diff --git a/Makefile.in b/Makefile.in
index 64433a27..fb159fee 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -189,8 +189,8 @@ LIBOBJS0 = alter.lo analyze.lo attach.lo auth.lo \
          random.lo resolve.lo rowset.lo rtree.lo select.lo status.lo \
          table.lo tokenize.lo trigger.lo \
          update.lo util.lo vacuum.lo \
-         vdbe.lo vdbeapi.lo vdbeaux.lo vdbeblob.lo vdbemem.lo vdbetrace.lo \
-         wal.lo walker.lo where.lo utf.lo vtab.lo $(CRYPTOLIBOBJ)
+         vdbe.lo vdbeapi.lo vdbeaux.lo vdbeblob.lo vdbemem.lo vdbesort.lo \
+         vdbetrace.lo wal.lo walker.lo where.lo utf.lo vtab.lo $(CRYPTOLIBOBJ) 
 
 # Object files for the amalgamation.
 #
@@ -287,6 +287,7 @@ SRC = \
   $(TOP)/src/vdbeaux.c \
   $(TOP)/src/vdbeblob.c \
   $(TOP)/src/vdbemem.c \
+  $(TOP)/src/vdbesort.c \
   $(TOP)/src/vdbetrace.c \
   $(TOP)/src/vdbeInt.h \
   $(TOP)/src/vtab.c \
@@ -530,6 +531,9 @@ sqlite3$(TEXE):	$(TOP)/src/shell.c libsqlite3.la sqlite3.h
 sqlite3.c:	.target_source $(TOP)/tool/mksqlite3c.tcl
 	$(TCLSH_CMD) $(TOP)/tool/mksqlite3c.tcl
 
+sqlite3-all.c:	sqlite3.c $(TOP)/tool/split-sqlite3c.tcl
+	$(TCLSH_CMD) $(TOP)/tool/split-sqlite3c.tcl
+
 # Rule to build the amalgamation
 #
 sqlite3.lo:	sqlite3.c
@@ -757,6 +761,9 @@ vdbeblob.lo:	$(TOP)/src/vdbeblob.c $(HDR)
 vdbemem.lo:	$(TOP)/src/vdbemem.c $(HDR)
 	$(LTCOMPILE) $(TEMP_STORE) -c $(TOP)/src/vdbemem.c
 
+vdbesort.lo:	$(TOP)/src/vdbesort.c $(HDR)
+	$(LTCOMPILE) $(TEMP_STORE) -c $(TOP)/src/vdbesort.c
+
 vdbetrace.lo:	$(TOP)/src/vdbetrace.c $(HDR)
 	$(LTCOMPILE) $(TEMP_STORE) -c $(TOP)/src/vdbetrace.c
 
@@ -788,7 +795,7 @@ tclsqlite3$(TEXE):	tclsqlite-shell.lo libsqlite3.la
 # Rules to build opcodes.c and opcodes.h
 #
 opcodes.c:	opcodes.h $(TOP)/mkopcodec.awk
-	sort -n -b -k 3 opcodes.h | $(NAWK) -f $(TOP)/mkopcodec.awk >opcodes.c
+	$(NAWK) -f $(TOP)/mkopcodec.awk opcodes.h >opcodes.c
 
 opcodes.h:	parse.h $(TOP)/src/vdbe.c $(TOP)/mkopcodeh.awk
 	cat parse.h $(TOP)/src/vdbe.c | $(NAWK) -f $(TOP)/mkopcodeh.awk >opcodes.h
@@ -805,7 +812,7 @@ parse.c:	$(TOP)/src/parse.y lemon$(BEXE) $(TOP)/addopcodes.awk
 	$(NAWK) -f $(TOP)/addopcodes.awk parse.h.temp >parse.h
 
 sqlite3.h:	$(TOP)/src/sqlite.h.in $(TOP)/manifest.uuid $(TOP)/VERSION
-	tclsh $(TOP)/tool/mksqlite3h.tcl $(TOP) >sqlite3.h
+	$(TCLSH_CMD) $(TOP)/tool/mksqlite3h.tcl $(TOP) >sqlite3.h
 
 keywordhash.h:	$(TOP)/tool/mkkeywordhash.c
 	$(BCC) -o mkkeywordhash$(BEXE) $(OPT_FEATURE_FLAGS) $(OPTS) $(TOP)/tool/mkkeywordhash.c
@@ -879,6 +886,7 @@ rtree.lo:	$(TOP)/ext/rtree/rtree.c $(HDR) $(EXTHDR)
 #
 TESTFIXTURE_FLAGS  = -DTCLSH=1 -DSQLITE_TEST=1 -DSQLITE_CRASH_TEST=1
 TESTFIXTURE_FLAGS += -DSQLITE_SERVER=1 -DSQLITE_PRIVATE="" -DSQLITE_CORE 
+TESTFIXTURE_FLAGS += -DBUILD_sqlite
 
 TESTFIXTURE_SRC0 = $(TESTSRC2) libsqlite3.la
 TESTFIXTURE_SRC1 = sqlite3.c
@@ -898,18 +906,16 @@ soaktest:	testfixture$(TEXE) sqlite3$(TEXE)
 test:	testfixture$(TEXE) sqlite3$(TEXE)
 	./testfixture$(TEXE) $(TOP)/test/veryquick.test
 
-sqlite3_analyzer$(TEXE):	$(TESTFIXTURE_SRC) $(TOP)/tool/spaceanal.tcl
-	sed \
-	  -e '/^#/d' \
-	  -e 's,\\,\\\\,g' \
-	  -e 's,",\\",g' \
-	  -e 's,^,",' \
-	  -e 's,$$,\\n",' \
-	  $(TOP)/tool/spaceanal.tcl >spaceanal_tcl.h
-	$(LTLINK) -DTCLSH=2 -DSQLITE_TEST=1 -DSQLITE_CRASH_TEST=1 \
-		-DSQLITE_SERVER=1 -DSQLITE_PRIVATE="" -DSQLITE_CORE \
-		$(TEMP_STORE) -o $@ $(TESTFIXTURE_SRC) $(LIBTCL) $(TLIBS)
+sqlite3_analyzer.c: sqlite3.c $(TOP)/src/test_stat.c $(TOP)/src/tclsqlite.c $(TOP)/tool/spaceanal.tcl
+	echo "#define TCLSH 2" > $@
+	cat sqlite3.c $(TOP)/src/test_stat.c $(TOP)/src/tclsqlite.c >> $@
+	echo "static const char *tclsh_main_loop(void){" >> $@
+	echo "static const char *zMainloop = " >> $@
+	$(NAWK) -f $(TOP)/tool/tostr.awk $(TOP)/tool/spaceanal.tcl >> $@
+	echo "; return zMainloop; }" >> $@
 
+sqlite3_analyzer$(TEXE): sqlite3_analyzer.c
+	$(LTLINK) sqlite3_analyzer.c -o $@ $(LIBTCL) $(TLIBS)
 
 # Standard install and cleanup targets
 #
@@ -943,9 +949,11 @@ clean:
 	rm -f $(PUBLISH)
 	rm -f *.da *.bb *.bbg gmon.out
 	rm -rf tsrc .target_source
+	rm -f tclsqlite3$(TEXE)
 	rm -f testfixture$(TEXE) test.db
-	rm -f sqlite3.dll sqlite3.lib sqlite3.def
+	rm -f sqlite3.dll sqlite3.lib sqlite3.exp sqlite3.def
 	rm -f sqlite3.c
+	rm -f sqlite3_analyzer$(TEXE) sqlite3_analyzer.c
 
 distclean:	clean
 	rm -f config.log config.status libtool Makefile sqlite3.pc
diff --git a/Makefile.msc b/Makefile.msc
index a6d1bf4c..f40936d9 100644
--- a/Makefile.msc
+++ b/Makefile.msc
@@ -11,22 +11,43 @@ TOP = .
 #
 USE_AMALGAMATION = 1
 
+# Set this non-0 to use the International Components for Unicode (ICU).
+#
+USE_ICU = 0
+
+# Set this to non-0 to create and use PDBs.
+#
+SYMBOLS = 1
+
+# Set this to one of the following values to enable various debugging
+# features.  Each level includes the debugging options from the previous
+# levels.  Currently, the recognized values for DEBUG are:
+#
+# 0 == NDEBUG: Disables assert() and other runtime diagnostics.
+# 1 == Disables NDEBUG and all optimizations and then enables PDBs.
+# 2 == SQLITE_DEBUG: Enables various diagnostics messages and code.
+# 3 == SQLITE_WIN32_MALLOC_VALIDATE: Validate the Win32 native heap per call.
+# 4 == SQLITE_DEBUG_OS_TRACE: Enables output from the OSTRACE() macros.
+# 5 == SQLITE_ENABLE_IOTRACE: Enables output from the IOTRACE() macros.
+#
+DEBUG = 0
+
 # Version numbers and release number for the SQLite being compiled.
 #
 VERSION = 3.7
-VERSION_NUMBER = 3007007
-RELEASE = 3.7.7
+VERSION_NUMBER = 3007009
+RELEASE = 3.7.9
 
 # C Compiler and options for use in building executables that
 # will run on the platform that is doing the build.
 #
-BCC = cl.exe -O2
+BCC = cl.exe
 
 # C Compile and options for use in building executables that
 # will run on the target platform.  (BCC and TCC are usually the
 # same unless your are cross-compiling.)
 #
-TCC = cl.exe -W3 -O2 -DSQLITE_OS_WIN=1 -I. -I$(TOP)\src -fp:precise
+TCC = cl.exe -W3 -DSQLITE_OS_WIN=1 -I. -I$(TOP)\src -fp:precise
 
 # The mksqlite3c.tcl and mksqlite3h.tcl scripts will pull in 
 # any extension header files by default.  For non-amalgamation
@@ -41,18 +62,82 @@ TCC = $(TCC) -I$(TOP)\ext\rtree
 # Omitting the define will cause extra debugging code to be inserted and
 # includes extra comments when "EXPLAIN stmt" is used.
 #
+!IF $(DEBUG)==0
 TCC = $(TCC) -DNDEBUG
+!ENDIF
+
+!IF $(DEBUG)>1
+TCC = $(TCC) -DSQLITE_DEBUG
+!ENDIF
+
+!IF $(DEBUG)>3
+TCC = $(TCC) -DSQLITE_DEBUG_OS_TRACE=1
+!ENDIF
+
+!IF $(DEBUG)>4
+TCC = $(TCC) -DSQLITE_ENABLE_IOTRACE
+!ENDIF
 
-# The library that programs using TCL must link against.
 #
-LIBTCL = tcl85.lib
+# Prevent warnings about "insecure" runtime library functions being used.
+#
+TCC = $(TCC) -D_CRT_SECURE_NO_DEPRECATE -D_CRT_SECURE_NO_WARNINGS
+
+#
+# Use native Win32 heap instead of malloc/free?
+#
+# TCC = $(TCC) -DSQLITE_WIN32_MALLOC=1
+
+#
+# Validate the heap on every call into the native Win32 heap subsystem?
+#
+!IF $(DEBUG)>2
+TCC = $(TCC) -DSQLITE_WIN32_MALLOC_VALIDATE=1
+!ENDIF
+
+# The locations of the Tcl header and library files.  Also, the library that
+# non-stubs enabled programs using Tcl must link against.  These variables
+# (TCLINCDIR, TCLLIBDIR, and LIBTCL) may be overridden via the environment
+# prior to running nmake in order to match the actual installed location and
+# version on this machine.
+#
+!if "$(TCLINCDIR)" == ""
 TCLINCDIR = c:\tcl\include
+!endif
+
+!if "$(TCLLIBDIR)" == ""
 TCLLIBDIR = c:\tcl\lib
+!endif
+
+!if "$(LIBTCL)" == ""
+LIBTCL = tcl85.lib
+!endif
+
+# The locations of the ICU header and library files.  These variables
+# (ICUINCDIR, ICULIBDIR, and LIBICU) may be overridden via the environment
+# prior to running nmake in order to match the actual installed location on
+# this machine.
+#
+!if "$(ICUINCDIR)" == ""
+ICUINCDIR = c:\icu\include
+!endif
+
+!if "$(ICULIBDIR)" == ""
+ICULIBDIR = c:\icu\lib
+!endif
+
+!if "$(LIBICU)" == ""
+LIBICU = icuuc.lib icuin.lib
+!endif
 
 # This is the command to use for tclsh - normally just "tclsh", but we may
-# know the specific version we want to use
+# know the specific version we want to use.  This variable (TCLSH_CMD) may be
+# overridden via the environment prior to running nmake in order to select a
+# specific Tcl shell to use.
 #
+!if "$(TCLSH_CMD)" == ""
 TCLSH_CMD = tclsh85
+!endif
 
 # Compiler options needed for programs that use the readline() library.
 #
@@ -72,7 +157,9 @@ TCC = $(TCC) -DSQLITE_THREAD_OVERRIDE_LOCK=-1
 
 # Any target libraries which libsqlite must be linked against
 #
+!if "$(TLIBS)" == ""
 TLIBS =
+!endif
 
 # Flags controlling use of the in memory btree implementation
 #
@@ -103,6 +190,25 @@ TCC = $(TCC) $(OPT_FEATURE_FLAGS)
 # ie.  make "OPTS=-DSQLITE_ENABLE_FOO=1 -DSQLITE_OMIT_FOO=1".
 TCC = $(TCC) $(OPTS)
 
+# If symbols are enabled, enable PDBs.
+# If debugging is enabled, disable all optimizations and enable PDBs.
+!IF $(DEBUG)>0
+TCC = $(TCC) -Od -D_DEBUG
+!ELSE
+TCC = $(TCC) -O2
+!ENDIF
+
+!IF $(DEBUG)>0 || $(SYMBOLS)!=0
+TCC = $(TCC) -Zi
+!ENDIF
+
+# If ICU support is enabled, add the compiler options for it.
+!IF $(USE_ICU)!=0
+TCC = $(TCC) -DSQLITE_ENABLE_ICU=1
+TCC = $(TCC) -I$(TOP)\ext\icu
+TCC = $(TCC) -I$(ICUINCDIR)
+!ENDIF
+
 # libtool compile/link
 LTCOMPILE = $(TCC) -Fo$@
 LTLIB = lib.exe
@@ -117,8 +223,23 @@ LTLINKOPTS = /MACHINE:$(PLATFORM)
 LTLIBOPTS = /MACHINE:$(PLATFORM)
 !ENDIF
 
+# If debugging is enabled, enable PDBs.
+!IF $(DEBUG)>0 || $(SYMBOLS)!=0
+LTLINKOPTS = $(LTLINKOPTS) /DEBUG
+!ENDIF
+
+# Start with the Tcl related linker options.
+LTLIBPATHS = /LIBPATH:$(TCLLIBDIR)
+LTLIBS = $(LIBTCL)
+
+# If ICU support is enabled, add the linker options for it.
+!IF $(USE_ICU)!=0
+LTLIBPATHS = $(LTLIBPATHS) /LIBPATH:$(ICULIBDIR)
+LTLIBS = $(LTLIBS) $(LIBICU)
+!ENDIF
+
 # nawk compatible awk.
-NAWK = .\gawk.exe
+NAWK = gawk.exe
 
 # You should not have to change anything below this line
 ###############################################################################
@@ -141,8 +262,8 @@ LIBOBJS0 = alter.lo analyze.lo attach.lo auth.lo \
          random.lo resolve.lo rowset.lo rtree.lo select.lo status.lo \
          table.lo tokenize.lo trigger.lo \
          update.lo util.lo vacuum.lo \
-         vdbe.lo vdbeapi.lo vdbeaux.lo vdbeblob.lo vdbemem.lo vdbetrace.lo \
-         wal.lo walker.lo where.lo utf.lo vtab.lo
+         vdbe.lo vdbeapi.lo vdbeaux.lo vdbeblob.lo vdbemem.lo vdbesort.lo \
+         vdbetrace.lo wal.lo walker.lo where.lo utf.lo vtab.lo
 
 # Object files for the amalgamation.
 #
@@ -241,6 +362,7 @@ SRC = \
   $(TOP)\src\vdbeaux.c \
   $(TOP)\src\vdbeblob.c \
   $(TOP)\src\vdbemem.c \
+  $(TOP)\src\vdbesort.c \
   $(TOP)\src\vdbetrace.c \
   $(TOP)\src\vdbeInt.h \
   $(TOP)\src\vtab.c \
@@ -382,6 +504,7 @@ TESTSRC2 = \
   $(TOP)\src\vdbeaux.c \
   $(TOP)\src\vdbe.c \
   $(TOP)\src\vdbemem.c \
+  $(TOP)\src\vdbesort.c \
   $(TOP)\src\vdbetrace.c \
   $(TOP)\src\where.c \
   parse.c \
@@ -439,18 +562,18 @@ EXTHDR = $(EXTHDR) \
 # This is the default Makefile target.  The objects listed here
 # are what get build when you type just "make" with no arguments.
 #
-all:	libsqlite3.lib sqlite3.exe libtclsqlite3.lib
+all:	dll libsqlite3.lib sqlite3.exe libtclsqlite3.lib
 
 libsqlite3.lib:	$(LIBOBJ)
 	$(LTLIB) $(LTLIBOPTS) /OUT:$@ $(LIBOBJ) $(TLIBS)
 
 libtclsqlite3.lib:	tclsqlite.lo libsqlite3.lib
-	$(LTLIB) $(LTLIBOPTS) /LIBPATH:$(TCLLIBDIR) /OUT:$@ tclsqlite.lo libsqlite3.lib $(LIBTCL:tcl=tclstub) $(TLIBS)
+	$(LTLIB) $(LTLIBOPTS) $(LTLIBPATHS) /OUT:$@ tclsqlite.lo libsqlite3.lib $(LIBTCL:tcl=tclstub) $(TLIBS)
 
 sqlite3.exe:	$(TOP)\src\shell.c libsqlite3.lib sqlite3.h
 	$(LTLINK) $(READLINE_FLAGS) \
 		$(TOP)\src\shell.c \
-		/link $(LTLINKOPTS) libsqlite3.lib $(LIBREADLINE) $(TLIBS)
+		/link $(LTLINKOPTS) $(LTLIBPATHS) libsqlite3.lib $(LIBREADLINE) $(LTLIBS) $(TLIBS)
 
 # This target creates a directory named "tsrc" and fills it with
 # copies of all of the C source code and header files needed to
@@ -463,13 +586,16 @@ sqlite3.exe:	$(TOP)\src\shell.c libsqlite3.lib sqlite3.h
 	-mkdir tsrc
 	for %i in ($(SRC)) do copy /Y %i tsrc
 	del /Q tsrc\sqlite.h.in tsrc\parse.y
-	$(TCLSH_CMD) $(TOP)\tool\vdbe-compress.tcl <tsrc\vdbe.c >vdbe.new
+	$(TCLSH_CMD) $(TOP)\tool\vdbe-compress.tcl < tsrc\vdbe.c > vdbe.new
 	move vdbe.new tsrc\vdbe.c
 	echo > .target_source
 
 sqlite3.c:	.target_source $(TOP)\tool\mksqlite3c.tcl
 	$(TCLSH_CMD) $(TOP)\tool\mksqlite3c.tcl
 
+sqlite3-all.c:	sqlite3.c $(TOP)/tool/split-sqlite3c.tcl
+	$(TCLSH_CMD) $(TOP)/tool/split-sqlite3c.tcl
+
 # Rule to build the amalgamation
 #
 sqlite3.lo:	sqlite3.c
@@ -692,6 +818,9 @@ vdbeblob.lo:	$(TOP)\src\vdbeblob.c $(HDR)
 vdbemem.lo:	$(TOP)\src\vdbemem.c $(HDR)
 	$(LTCOMPILE) -c $(TOP)\src\vdbemem.c
 
+vdbesort.lo:	$(TOP)\src\vdbesort.c $(HDR)
+	$(LTCOMPILE) -c $(TOP)\src\vdbesort.c
+
 vdbetrace.lo:	$(TOP)\src\vdbetrace.c $(HDR)
 	$(LTCOMPILE) -c $(TOP)\src\vdbetrace.c
 
@@ -715,15 +844,15 @@ tclsqlite-shell.lo:	$(TOP)\src\tclsqlite.c $(HDR)
 
 tclsqlite3.exe:	tclsqlite-shell.lo libsqlite3.lib
 	$(LTLINK) tclsqlite-shell.lo \
-		/link $(LTLINKOPTS) /LIBPATH:$(TCLLIBDIR) libsqlite3.lib $(LIBTCL)
+		/link $(LTLINKOPTS) $(LTLIBPATHS) libsqlite3.lib $(LTLIBS) $(TLIBS)
 
 # Rules to build opcodes.c and opcodes.h
 #
 opcodes.c:	opcodes.h $(TOP)\mkopcodec.awk
-	$(NAWK) "/#define OP_/ { print }" opcodes.h | sort /+45 | $(NAWK) -f $(TOP)\mkopcodec.awk >opcodes.c
+	$(NAWK) -f $(TOP)\mkopcodec.awk opcodes.h > opcodes.c
 
 opcodes.h:	parse.h $(TOP)\src\vdbe.c $(TOP)\mkopcodeh.awk
-	type parse.h $(TOP)\src\vdbe.c | $(NAWK) -f $(TOP)\mkopcodeh.awk >opcodes.h
+	type parse.h $(TOP)\src\vdbe.c | $(NAWK) -f $(TOP)\mkopcodeh.awk > opcodes.h
 
 # Rules to build parse.c and parse.h - the outputs of lemon.
 #
@@ -734,16 +863,16 @@ parse.c:	$(TOP)\src\parse.y lemon.exe $(TOP)\addopcodes.awk
 	copy $(TOP)\src\parse.y .
 	.\lemon.exe $(OPT_FEATURE_FLAGS) $(OPTS) parse.y
 	move parse.h parse.h.temp
-	$(NAWK) -f $(TOP)\addopcodes.awk parse.h.temp >parse.h
+	$(NAWK) -f $(TOP)\addopcodes.awk parse.h.temp > parse.h
 
 sqlite3.h:	$(TOP)\src\sqlite.h.in $(TOP)\manifest.uuid $(TOP)\VERSION
-	$(TCLSH_CMD) $(TOP)\tool\mksqlite3h.tcl $(TOP) >sqlite3.h
+	$(TCLSH_CMD) $(TOP)\tool\mksqlite3h.tcl $(TOP) > sqlite3.h
 
 mkkeywordhash.exe:	$(TOP)\tool\mkkeywordhash.c
 	$(BCC) -Femkkeywordhash.exe $(OPT_FEATURE_FLAGS) $(OPTS) $(TOP)\tool\mkkeywordhash.c
 
 keywordhash.h:	$(TOP)\tool\mkkeywordhash.c mkkeywordhash.exe
-	.\mkkeywordhash.exe >keywordhash.h
+	.\mkkeywordhash.exe > keywordhash.h
 
 
 
@@ -826,7 +955,7 @@ testfixture.exe:	$(TESTFIXTURE_SRC) $(HDR)
 	$(LTLINK) -DSQLITE_NO_SYNC=1 $(TESTFIXTURE_FLAGS) \
 		-DBUILD_sqlite -I$(TCLINCDIR) \
 		$(TESTFIXTURE_SRC) \
-		/link $(LTLINKOPTS) /LIBPATH:$(TCLLIBDIR) $(LIBTCL) $(TLIBS)
+		/link $(LTLINKOPTS) $(LTLIBPATHS) $(LTLIBS) $(TLIBS)
 
 fulltest:	testfixture.exe sqlite3.exe
 	.\testfixture.exe $(TOP)\test\all.test
@@ -837,28 +966,29 @@ soaktest:	testfixture.exe sqlite3.exe
 test:	testfixture.exe sqlite3.exe
 	.\testfixture.exe $(TOP)\test\veryquick.test
 
-spaceanal_tcl.h:	$(TOP)\tool\spaceanal.tcl
-	$(NAWK) -f $(TOP)/tool/tostr.awk \
-		$(TOP)\tool\spaceanal.tcl >spaceanal_tcl.h
+sqlite3_analyzer.c: sqlite3.c $(TOP)\src\test_stat.c $(TOP)\src\tclsqlite.c $(TOP)\tool\spaceanal.tcl
+	copy sqlite3.c + $(TOP)\src\test_stat.c + $(TOP)\src\tclsqlite.c $@
+	echo static const char *tclsh_main_loop(void){ >> $@
+	echo static const char *zMainloop = >> $@
+	$(NAWK) -f $(TOP)\tool\tostr.awk $(TOP)\tool\spaceanal.tcl >> $@
+	echo ; return zMainloop; } >> $@
 
-sqlite3_analyzer.exe:	$(TESTFIXTURE_SRC) spaceanal_tcl.h
-	$(LTLINK) -DTCLSH=2 -DSQLITE_TEST=1 -DSQLITE_CRASH_TEST=1 \
-		-DSQLITE_SERVER=1 -DSQLITE_PRIVATE="" -DSQLITE_CORE \
-		-DBUILD_sqlite -I$(TCLINCDIR) \
-		$(TESTFIXTURE_SRC) \
-		/link $(LTLINKOPTS) /LIBPATH:$(TCLLIBDIR) $(LIBTCL) $(TLIBS)
+sqlite3_analyzer.exe:	sqlite3_analyzer.c
+	$(LTLINK) -DBUILD_sqlite -DTCLSH=2 -I$(TCLINCDIR) sqlite3_analyzer.c \
+		/link $(LTLINKOPTS) $(LTLIBPATHS) $(LTLIBS) $(TLIBS)
 
 clean:
-	del /Q *.lo *.lib *.obj sqlite3.exe libsqlite3.lib
+	del /Q *.lo *.ilk *.lib *.obj *.pdb sqlite3.exe libsqlite3.lib
 	del /Q sqlite3.h opcodes.c opcodes.h
 	del /Q lemon.exe lempar.c parse.*
 	del /Q mkkeywordhash.exe keywordhash.h
 	-rmdir /Q/S tsrc
 	del /Q .target_source
+	del /Q tclsqlite3.exe
 	del /Q testfixture.exe testfixture.exp test.db
 	del /Q sqlite3.dll sqlite3.lib sqlite3.exp sqlite3.def
 	del /Q sqlite3.c
-	del /Q sqlite3_analyzer.exe sqlite3_analyzer.exp spaceanal_tcl.h
+	del /Q sqlite3_analyzer.exe sqlite3_analyzer.exp sqlite3_analyzer.c
 
 #
 # Windows section
@@ -866,10 +996,10 @@ clean:
 dll: sqlite3.dll
 
 sqlite3.def: libsqlite3.lib
-	echo EXPORTS >sqlite3.def
+	echo EXPORTS > sqlite3.def
 	dumpbin /all libsqlite3.lib \
-		| $(NAWK) "/ 1 _sqlite3_/ { sub(/^.* _/,\"\");print }" \
-		| sort >>sqlite3.def
+		| $(NAWK) "/ 1 _?sqlite3_/ { sub(/^.* _?/,\"\");print }" \
+		| sort >> sqlite3.def
 
 sqlite3.dll: $(LIBOBJ) sqlite3.def
-	link $(LTLINKOPTS) /DLL /DEF:sqlite3.def /OUT:$@ $(LIBOBJ)
+	link $(LTLINKOPTS) $(LTLIBPATHS) /DLL /DEF:sqlite3.def /OUT:$@ $(LIBOBJ) $(LTLIBS) $(TLIBS)
diff --git a/Makefile.vxworks b/Makefile.vxworks
index 993e5579..8d57da72 100644
--- a/Makefile.vxworks
+++ b/Makefile.vxworks
@@ -517,7 +517,7 @@ tclsqlite.o:	$(TOP)/src/tclsqlite.c $(HDR)
 # Rules to build opcodes.c and opcodes.h
 #
 opcodes.c:	opcodes.h $(TOP)/mkopcodec.awk
-	sort -n -b -k 3 opcodes.h | $(NAWK) -f $(TOP)/mkopcodec.awk >opcodes.c
+	$(NAWK) -f $(TOP)/mkopcodec.awk opcodes.h >opcodes.c
 
 opcodes.h:	parse.h $(TOP)/src/vdbe.c $(TOP)/mkopcodeh.awk
 	cat parse.h $(TOP)/src/vdbe.c | \
diff --git a/VERSION b/VERSION
index 9076adfe..c77a7de8 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-3.7.7.1
+3.7.9
diff --git a/configure b/configure
index b565366d..79cd72de 100755
--- a/configure
+++ b/configure
@@ -1,18 +1,22 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.62 for sqlite 3.7.7.1.
+# Generated by GNU Autoconf 2.67 for sqlite 3.7.9.
+#
 #
 # Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001,
-# 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
+# 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 Free Software
+# Foundation, Inc.
+#
+#
 # This configure script is free software; the Free Software Foundation
 # gives unlimited permission to copy, distribute and modify it.
-## --------------------- ##
-## M4sh Initialization.  ##
-## --------------------- ##
+## -------------------- ##
+## M4sh Initialization. ##
+## -------------------- ##
 
 # Be more Bourne compatible
 DUALCASE=1; export DUALCASE # for MKS sh
-if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then
+if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then :
   emulate sh
   NULLCMD=:
   # Pre-4.2 versions of Zsh do word splitting on ${1+"$@"}, which
@@ -20,23 +24,15 @@ if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then
   alias -g '${1+"$@"}'='"$@"'
   setopt NO_GLOB_SUBST
 else
-  case `(set -o) 2>/dev/null` in
-  *posix*) set -o posix ;;
+  case `(set -o) 2>/dev/null` in #(
+  *posix*) :
+    set -o posix ;; #(
+  *) :
+     ;;
 esac
-
 fi
 
 
-
-
-# PATH needs CR
-# Avoid depending upon Character Ranges.
-as_cr_letters='abcdefghijklmnopqrstuvwxyz'
-as_cr_LETTERS='ABCDEFGHIJKLMNOPQRSTUVWXYZ'
-as_cr_Letters=$as_cr_letters$as_cr_LETTERS
-as_cr_digits='0123456789'
-as_cr_alnum=$as_cr_Letters$as_cr_digits
-
 as_nl='
 '
 export as_nl
@@ -44,7 +40,13 @@ export as_nl
 as_echo='\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'
 as_echo=$as_echo$as_echo$as_echo$as_echo$as_echo
 as_echo=$as_echo$as_echo$as_echo$as_echo$as_echo$as_echo
-if (test "X`printf %s $as_echo`" = "X$as_echo") 2>/dev/null; then
+# Prefer a ksh shell builtin over an external printf program on Solaris,
+# but without wasting forks for bash or zsh.
+if test -z "$BASH_VERSION$ZSH_VERSION" \
+    && (test "X`print -r -- $as_echo`" = "X$as_echo") 2>/dev/null; then
+  as_echo='print -r --'
+  as_echo_n='print -rn --'
+elif (test "X`printf %s $as_echo`" = "X$as_echo") 2>/dev/null; then
   as_echo='printf %s\n'
   as_echo_n='printf %s'
 else
@@ -55,7 +57,7 @@ else
     as_echo_body='eval expr "X$1" : "X\\(.*\\)"'
     as_echo_n_body='eval
       arg=$1;
-      case $arg in
+      case $arg in #(
       *"$as_nl"*)
 	expr "X$arg" : "X\\(.*\\)$as_nl";
 	arg=`expr "X$arg" : ".*$as_nl\\(.*\\)"`;;
@@ -78,13 +80,6 @@ if test "${PATH_SEPARATOR+set}" != set; then
   }
 fi
 
-# Support unset when possible.
-if ( (MAIL=60; unset MAIL) || exit) >/dev/null 2>&1; then
-  as_unset=unset
-else
-  as_unset=false
-fi
-
 
 # IFS
 # We need space, tab and new line, in precisely that order.  Quoting is
@@ -94,15 +89,15 @@ fi
 IFS=" ""	$as_nl"
 
 # Find who we are.  Look in the path if we contain no directory separator.
-case $0 in
+case $0 in #((
   *[\\/]* ) as_myself=$0 ;;
   *) as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
   test -z "$as_dir" && as_dir=.
-  test -r "$as_dir/$0" && as_myself=$as_dir/$0 && break
-done
+    test -r "$as_dir/$0" && as_myself=$as_dir/$0 && break
+  done
 IFS=$as_save_IFS
 
      ;;
@@ -114,12 +109,16 @@ if test "x$as_myself" = x; then
 fi
 if test ! -f "$as_myself"; then
   $as_echo "$as_myself: error: cannot find myself; rerun with an absolute file name" >&2
-  { (exit 1); exit 1; }
+  exit 1
 fi
 
-# Work around bugs in pre-3.0 UWIN ksh.
-for as_var in ENV MAIL MAILPATH
-do ($as_unset $as_var) >/dev/null 2>&1 && $as_unset $as_var
+# Unset variables that we do not need and which cause bugs (e.g. in
+# pre-3.0 UWIN ksh).  But do not cause bugs in bash 2.01; the "|| exit 1"
+# suppresses any "Segmentation fault" message there.  '((' could
+# trigger a bug in pdksh 5.2.14.
+for as_var in BASH_ENV ENV MAIL MAILPATH
+do eval test x\${$as_var+set} = xset \
+  && ( (unset $as_var) || exit 1) >/dev/null 2>&1 && unset $as_var || :
 done
 PS1='$ '
 PS2='> '
@@ -131,7 +130,248 @@ export LC_ALL
 LANGUAGE=C
 export LANGUAGE
 
-# Required to use basename.
+# CDPATH.
+(unset CDPATH) >/dev/null 2>&1 && unset CDPATH
+
+if test "x$CONFIG_SHELL" = x; then
+  as_bourne_compatible="if test -n \"\${ZSH_VERSION+set}\" && (emulate sh) >/dev/null 2>&1; then :
+  emulate sh
+  NULLCMD=:
+  # Pre-4.2 versions of Zsh do word splitting on \${1+\"\$@\"}, which
+  # is contrary to our usage.  Disable this feature.
+  alias -g '\${1+\"\$@\"}'='\"\$@\"'
+  setopt NO_GLOB_SUBST
+else
+  case \`(set -o) 2>/dev/null\` in #(
+  *posix*) :
+    set -o posix ;; #(
+  *) :
+     ;;
+esac
+fi
+"
+  as_required="as_fn_return () { (exit \$1); }
+as_fn_success () { as_fn_return 0; }
+as_fn_failure () { as_fn_return 1; }
+as_fn_ret_success () { return 0; }
+as_fn_ret_failure () { return 1; }
+
+exitcode=0
+as_fn_success || { exitcode=1; echo as_fn_success failed.; }
+as_fn_failure && { exitcode=1; echo as_fn_failure succeeded.; }
+as_fn_ret_success || { exitcode=1; echo as_fn_ret_success failed.; }
+as_fn_ret_failure && { exitcode=1; echo as_fn_ret_failure succeeded.; }
+if ( set x; as_fn_ret_success y && test x = \"\$1\" ); then :
+
+else
+  exitcode=1; echo positional parameters were not saved.
+fi
+test x\$exitcode = x0 || exit 1"
+  as_suggested="  as_lineno_1=";as_suggested=$as_suggested$LINENO;as_suggested=$as_suggested" as_lineno_1a=\$LINENO
+  as_lineno_2=";as_suggested=$as_suggested$LINENO;as_suggested=$as_suggested" as_lineno_2a=\$LINENO
+  eval 'test \"x\$as_lineno_1'\$as_run'\" != \"x\$as_lineno_2'\$as_run'\" &&
+  test \"x\`expr \$as_lineno_1'\$as_run' + 1\`\" = \"x\$as_lineno_2'\$as_run'\"' || exit 1
+test \$(( 1 + 1 )) = 2 || exit 1"
+  if (eval "$as_required") 2>/dev/null; then :
+  as_have_required=yes
+else
+  as_have_required=no
+fi
+  if test x$as_have_required = xyes && (eval "$as_suggested") 2>/dev/null; then :
+
+else
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+as_found=false
+for as_dir in /bin$PATH_SEPARATOR/usr/bin$PATH_SEPARATOR$PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  as_found=:
+  case $as_dir in #(
+	 /*)
+	   for as_base in sh bash ksh sh5; do
+	     # Try only shells that exist, to save several forks.
+	     as_shell=$as_dir/$as_base
+	     if { test -f "$as_shell" || test -f "$as_shell.exe"; } &&
+		    { $as_echo "$as_bourne_compatible""$as_required" | as_run=a "$as_shell"; } 2>/dev/null; then :
+  CONFIG_SHELL=$as_shell as_have_required=yes
+		   if { $as_echo "$as_bourne_compatible""$as_suggested" | as_run=a "$as_shell"; } 2>/dev/null; then :
+  break 2
+fi
+fi
+	   done;;
+       esac
+  as_found=false
+done
+$as_found || { if { test -f "$SHELL" || test -f "$SHELL.exe"; } &&
+	      { $as_echo "$as_bourne_compatible""$as_required" | as_run=a "$SHELL"; } 2>/dev/null; then :
+  CONFIG_SHELL=$SHELL as_have_required=yes
+fi; }
+IFS=$as_save_IFS
+
+
+      if test "x$CONFIG_SHELL" != x; then :
+  # We cannot yet assume a decent shell, so we have to provide a
+	# neutralization value for shells without unset; and this also
+	# works around shells that cannot unset nonexistent variables.
+	BASH_ENV=/dev/null
+	ENV=/dev/null
+	(unset BASH_ENV) >/dev/null 2>&1 && unset BASH_ENV ENV
+	export CONFIG_SHELL
+	exec "$CONFIG_SHELL" "$as_myself" ${1+"$@"}
+fi
+
+    if test x$as_have_required = xno; then :
+  $as_echo "$0: This script requires a shell more modern than all"
+  $as_echo "$0: the shells that I found on your system."
+  if test x${ZSH_VERSION+set} = xset ; then
+    $as_echo "$0: In particular, zsh $ZSH_VERSION has bugs and should"
+    $as_echo "$0: be upgraded to zsh 4.3.4 or later."
+  else
+    $as_echo "$0: Please tell bug-autoconf@gnu.org about your system,
+$0: including any error possibly output before this
+$0: message. Then install a modern shell, or manually run
+$0: the script under such a shell if you do have one."
+  fi
+  exit 1
+fi
+fi
+fi
+SHELL=${CONFIG_SHELL-/bin/sh}
+export SHELL
+# Unset more variables known to interfere with behavior of common tools.
+CLICOLOR_FORCE= GREP_OPTIONS=
+unset CLICOLOR_FORCE GREP_OPTIONS
+
+## --------------------- ##
+## M4sh Shell Functions. ##
+## --------------------- ##
+# as_fn_unset VAR
+# ---------------
+# Portably unset VAR.
+as_fn_unset ()
+{
+  { eval $1=; unset $1;}
+}
+as_unset=as_fn_unset
+
+# as_fn_set_status STATUS
+# -----------------------
+# Set $? to STATUS, without forking.
+as_fn_set_status ()
+{
+  return $1
+} # as_fn_set_status
+
+# as_fn_exit STATUS
+# -----------------
+# Exit the shell with STATUS, even in a "trap 0" or "set -e" context.
+as_fn_exit ()
+{
+  set +e
+  as_fn_set_status $1
+  exit $1
+} # as_fn_exit
+
+# as_fn_mkdir_p
+# -------------
+# Create "$as_dir" as a directory, including parents if necessary.
+as_fn_mkdir_p ()
+{
+
+  case $as_dir in #(
+  -*) as_dir=./$as_dir;;
+  esac
+  test -d "$as_dir" || eval $as_mkdir_p || {
+    as_dirs=
+    while :; do
+      case $as_dir in #(
+      *\'*) as_qdir=`$as_echo "$as_dir" | sed "s/'/'\\\\\\\\''/g"`;; #'(
+      *) as_qdir=$as_dir;;
+      esac
+      as_dirs="'$as_qdir' $as_dirs"
+      as_dir=`$as_dirname -- "$as_dir" ||
+$as_expr X"$as_dir" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+	 X"$as_dir" : 'X\(//\)[^/]' \| \
+	 X"$as_dir" : 'X\(//\)$' \| \
+	 X"$as_dir" : 'X\(/\)' \| . 2>/dev/null ||
+$as_echo X"$as_dir" |
+    sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)[^/].*/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\).*/{
+	    s//\1/
+	    q
+	  }
+	  s/.*/./; q'`
+      test -d "$as_dir" && break
+    done
+    test -z "$as_dirs" || eval "mkdir $as_dirs"
+  } || test -d "$as_dir" || as_fn_error $? "cannot create directory $as_dir"
+
+
+} # as_fn_mkdir_p
+# as_fn_append VAR VALUE
+# ----------------------
+# Append the text in VALUE to the end of the definition contained in VAR. Take
+# advantage of any shell optimizations that allow amortized linear growth over
+# repeated appends, instead of the typical quadratic growth present in naive
+# implementations.
+if (eval "as_var=1; as_var+=2; test x\$as_var = x12") 2>/dev/null; then :
+  eval 'as_fn_append ()
+  {
+    eval $1+=\$2
+  }'
+else
+  as_fn_append ()
+  {
+    eval $1=\$$1\$2
+  }
+fi # as_fn_append
+
+# as_fn_arith ARG...
+# ------------------
+# Perform arithmetic evaluation on the ARGs, and store the result in the
+# global $as_val. Take advantage of shells that can avoid forks. The arguments
+# must be portable across $(()) and expr.
+if (eval "test \$(( 1 + 1 )) = 2") 2>/dev/null; then :
+  eval 'as_fn_arith ()
+  {
+    as_val=$(( $* ))
+  }'
+else
+  as_fn_arith ()
+  {
+    as_val=`expr "$@" || test $? -eq 1`
+  }
+fi # as_fn_arith
+
+
+# as_fn_error STATUS ERROR [LINENO LOG_FD]
+# ----------------------------------------
+# Output "`basename $0`: error: ERROR" to stderr. If LINENO and LOG_FD are
+# provided, also output the error to LOG_FD, referencing LINENO. Then exit the
+# script with STATUS, using 1 if that was 0.
+as_fn_error ()
+{
+  as_status=$1; test $as_status -eq 0 && as_status=1
+  if test "$4"; then
+    as_lineno=${as_lineno-"$3"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+    $as_echo "$as_me:${as_lineno-$LINENO}: error: $2" >&$4
+  fi
+  $as_echo "$as_me: error: $2" >&2
+  as_fn_exit $as_status
+} # as_fn_error
+
 if expr a : '\(a\)' >/dev/null 2>&1 &&
    test "X`expr 00001 : '.*\(...\)'`" = X001; then
   as_expr=expr
@@ -145,8 +385,12 @@ else
   as_basename=false
 fi
 
+if (as_dir=`dirname -- /` && test "X$as_dir" = X/) >/dev/null 2>&1; then
+  as_dirname=dirname
+else
+  as_dirname=false
+fi
 
-# Name of the executable.
 as_me=`$as_basename -- "$0" ||
 $as_expr X/"$0" : '.*/\([^/][^/]*\)/*$' \| \
 	 X"$0" : 'X\(//\)$' \| \
@@ -166,295 +410,19 @@ $as_echo X/"$0" |
 	  }
 	  s/.*/./; q'`
 
-# CDPATH.
-$as_unset CDPATH
+# Avoid depending upon Character Ranges.
+as_cr_letters='abcdefghijklmnopqrstuvwxyz'
+as_cr_LETTERS='ABCDEFGHIJKLMNOPQRSTUVWXYZ'
+as_cr_Letters=$as_cr_letters$as_cr_LETTERS
+as_cr_digits='0123456789'
+as_cr_alnum=$as_cr_Letters$as_cr_digits
 
 
-if test "x$CONFIG_SHELL" = x; then
-  if (eval ":") 2>/dev/null; then
-  as_have_required=yes
-else
-  as_have_required=no
-fi
-
-  if test $as_have_required = yes &&	 (eval ":
-(as_func_return () {
-  (exit \$1)
-}
-as_func_success () {
-  as_func_return 0
-}
-as_func_failure () {
-  as_func_return 1
-}
-as_func_ret_success () {
-  return 0
-}
-as_func_ret_failure () {
-  return 1
-}
-
-exitcode=0
-if as_func_success; then
-  :
-else
-  exitcode=1
-  echo as_func_success failed.
-fi
-
-if as_func_failure; then
-  exitcode=1
-  echo as_func_failure succeeded.
-fi
-
-if as_func_ret_success; then
-  :
-else
-  exitcode=1
-  echo as_func_ret_success failed.
-fi
-
-if as_func_ret_failure; then
-  exitcode=1
-  echo as_func_ret_failure succeeded.
-fi
-
-if ( set x; as_func_ret_success y && test x = \"\$1\" ); then
-  :
-else
-  exitcode=1
-  echo positional parameters were not saved.
-fi
-
-test \$exitcode = 0) || { (exit 1); exit 1; }
-
-(
-  as_lineno_1=\$LINENO
-  as_lineno_2=\$LINENO
-  test \"x\$as_lineno_1\" != \"x\$as_lineno_2\" &&
-  test \"x\`expr \$as_lineno_1 + 1\`\" = \"x\$as_lineno_2\") || { (exit 1); exit 1; }
-") 2> /dev/null; then
-  :
-else
-  as_candidate_shells=
-    as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in /bin$PATH_SEPARATOR/usr/bin$PATH_SEPARATOR$PATH
-do
-  IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
-  case $as_dir in
-	 /*)
-	   for as_base in sh bash ksh sh5; do
-	     as_candidate_shells="$as_candidate_shells $as_dir/$as_base"
-	   done;;
-       esac
-done
-IFS=$as_save_IFS
-
-
-      for as_shell in $as_candidate_shells $SHELL; do
-	 # Try only shells that exist, to save several forks.
-	 if { test -f "$as_shell" || test -f "$as_shell.exe"; } &&
-		{ ("$as_shell") 2> /dev/null <<\_ASEOF
-if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then
-  emulate sh
-  NULLCMD=:
-  # Pre-4.2 versions of Zsh do word splitting on ${1+"$@"}, which
-  # is contrary to our usage.  Disable this feature.
-  alias -g '${1+"$@"}'='"$@"'
-  setopt NO_GLOB_SUBST
-else
-  case `(set -o) 2>/dev/null` in
-  *posix*) set -o posix ;;
-esac
-
-fi
-
-
-:
-_ASEOF
-}; then
-  CONFIG_SHELL=$as_shell
-	       as_have_required=yes
-	       if { "$as_shell" 2> /dev/null <<\_ASEOF
-if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then
-  emulate sh
-  NULLCMD=:
-  # Pre-4.2 versions of Zsh do word splitting on ${1+"$@"}, which
-  # is contrary to our usage.  Disable this feature.
-  alias -g '${1+"$@"}'='"$@"'
-  setopt NO_GLOB_SUBST
-else
-  case `(set -o) 2>/dev/null` in
-  *posix*) set -o posix ;;
-esac
-
-fi
-
-
-:
-(as_func_return () {
-  (exit $1)
-}
-as_func_success () {
-  as_func_return 0
-}
-as_func_failure () {
-  as_func_return 1
-}
-as_func_ret_success () {
-  return 0
-}
-as_func_ret_failure () {
-  return 1
-}
-
-exitcode=0
-if as_func_success; then
-  :
-else
-  exitcode=1
-  echo as_func_success failed.
-fi
-
-if as_func_failure; then
-  exitcode=1
-  echo as_func_failure succeeded.
-fi
-
-if as_func_ret_success; then
-  :
-else
-  exitcode=1
-  echo as_func_ret_success failed.
-fi
-
-if as_func_ret_failure; then
-  exitcode=1
-  echo as_func_ret_failure succeeded.
-fi
-
-if ( set x; as_func_ret_success y && test x = "$1" ); then
-  :
-else
-  exitcode=1
-  echo positional parameters were not saved.
-fi
-
-test $exitcode = 0) || { (exit 1); exit 1; }
-
-(
-  as_lineno_1=$LINENO
-  as_lineno_2=$LINENO
-  test "x$as_lineno_1" != "x$as_lineno_2" &&
-  test "x`expr $as_lineno_1 + 1`" = "x$as_lineno_2") || { (exit 1); exit 1; }
-
-_ASEOF
-}; then
-  break
-fi
-
-fi
-
-      done
-
-      if test "x$CONFIG_SHELL" != x; then
-  for as_var in BASH_ENV ENV
-	do ($as_unset $as_var) >/dev/null 2>&1 && $as_unset $as_var
-	done
-	export CONFIG_SHELL
-	exec "$CONFIG_SHELL" "$as_myself" ${1+"$@"}
-fi
-
-
-    if test $as_have_required = no; then
-  echo This script requires a shell more modern than all the
-      echo shells that I found on your system.  Please install a
-      echo modern shell, or manually run the script under such a
-      echo shell if you do have one.
-      { (exit 1); exit 1; }
-fi
-
-
-fi
-
-fi
-
-
-
-(eval "as_func_return () {
-  (exit \$1)
-}
-as_func_success () {
-  as_func_return 0
-}
-as_func_failure () {
-  as_func_return 1
-}
-as_func_ret_success () {
-  return 0
-}
-as_func_ret_failure () {
-  return 1
-}
-
-exitcode=0
-if as_func_success; then
-  :
-else
-  exitcode=1
-  echo as_func_success failed.
-fi
-
-if as_func_failure; then
-  exitcode=1
-  echo as_func_failure succeeded.
-fi
-
-if as_func_ret_success; then
-  :
-else
-  exitcode=1
-  echo as_func_ret_success failed.
-fi
-
-if as_func_ret_failure; then
-  exitcode=1
-  echo as_func_ret_failure succeeded.
-fi
-
-if ( set x; as_func_ret_success y && test x = \"\$1\" ); then
-  :
-else
-  exitcode=1
-  echo positional parameters were not saved.
-fi
-
-test \$exitcode = 0") || {
-  echo No shell found that supports shell functions.
-  echo Please tell bug-autoconf@gnu.org about your system,
-  echo including any error possibly output before this message.
-  echo This can help us improve future autoconf versions.
-  echo Configuration will now proceed without shell functions.
-}
-
-
-
-  as_lineno_1=$LINENO
-  as_lineno_2=$LINENO
-  test "x$as_lineno_1" != "x$as_lineno_2" &&
-  test "x`expr $as_lineno_1 + 1`" = "x$as_lineno_2" || {
-
-  # Create $as_me.lineno as a copy of $as_myself, but with $LINENO
-  # uniformly replaced by the line number.  The first 'sed' inserts a
-  # line-number line after each line using $LINENO; the second 'sed'
-  # does the real work.  The second script uses 'N' to pair each
-  # line-number line with the line containing $LINENO, and appends
-  # trailing '-' during substitution so that $LINENO is not a special
-  # case at line end.
-  # (Raja R Harinath suggested sed '=', and Paul Eggert wrote the
-  # scripts with optimization help from Paolo Bonzini.  Blame Lee
-  # E. McMahon (1931-1989) for sed's syntax.  :-)
+  as_lineno_1=$LINENO as_lineno_1a=$LINENO
+  as_lineno_2=$LINENO as_lineno_2a=$LINENO
+  eval 'test "x$as_lineno_1'$as_run'" != "x$as_lineno_2'$as_run'" &&
+  test "x`expr $as_lineno_1'$as_run' + 1`" = "x$as_lineno_2'$as_run'"' || {
+  # Blame Lee E. McMahon (1931-1989) for sed's syntax.  :-)
   sed -n '
     p
     /[$]LINENO/=
@@ -471,8 +439,7 @@ test \$exitcode = 0") || {
       s/-\n.*//
     ' >$as_me.lineno &&
   chmod +x "$as_me.lineno" ||
-    { $as_echo "$as_me: error: cannot create $as_me.lineno; rerun with a POSIX shell" >&2
-   { (exit 1); exit 1; }; }
+    { $as_echo "$as_me: error: cannot create $as_me.lineno; rerun with a POSIX shell" >&2; as_fn_exit 1; }
 
   # Don't try to exec as it changes $[0], causing all sort of problems
   # (the dirname of $[0] is not the place where we might find the
@@ -482,29 +449,18 @@ test \$exitcode = 0") || {
   exit
 }
 
-
-if (as_dir=`dirname -- /` && test "X$as_dir" = X/) >/dev/null 2>&1; then
-  as_dirname=dirname
-else
-  as_dirname=false
-fi
-
 ECHO_C= ECHO_N= ECHO_T=
-case `echo -n x` in
+case `echo -n x` in #(((((
 -n*)
-  case `echo 'x\c'` in
+  case `echo 'xy\c'` in
   *c*) ECHO_T='	';;	# ECHO_T is single tab character.
-  *)   ECHO_C='\c';;
+  xy)  ECHO_C='\c';;
+  *)   echo `echo ksh88 bug on AIX 6.1` > /dev/null
+       ECHO_T='	';;
   esac;;
 *)
   ECHO_N='-n';;
 esac
-if expr a : '\(a\)' >/dev/null 2>&1 &&
-   test "X`expr 00001 : '.*\(...\)'`" = X001; then
-  as_expr=expr
-else
-  as_expr=false
-fi
 
 rm -f conf$$ conf$$.exe conf$$.file
 if test -d conf$$.dir; then
@@ -534,7 +490,7 @@ rm -f conf$$ conf$$.exe conf$$.dir/conf$$.file conf$$.file
 rmdir conf$$.dir 2>/dev/null
 
 if mkdir -p . 2>/dev/null; then
-  as_mkdir_p=:
+  as_mkdir_p='mkdir -p "$as_dir"'
 else
   test -d ./-p && rmdir ./-p
   as_mkdir_p=false
@@ -553,10 +509,10 @@ else
       if test -d "$1"; then
 	test -d "$1/.";
       else
-	case $1 in
+	case $1 in #(
 	-*)set "./$1";;
 	esac;
-	case `ls -ld'$as_ls_L_option' "$1" 2>/dev/null` in
+	case `ls -ld'$as_ls_L_option' "$1" 2>/dev/null` in #((
 	???[sx]*):;;*)false;;esac;fi
     '\'' sh
   '
@@ -571,7 +527,6 @@ as_tr_sh="eval sed 'y%*+%pp%;s%[^_$as_cr_alnum]%_%g'"
 
 
 
-
 # Check that we are running under the correct shell.
 SHELL=${CONFIG_SHELL-/bin/sh}
 
@@ -720,10 +675,11 @@ fi
 
 
 
-exec 7<&0 </dev/null 6>&1
+test -n "$DJDIR" || exec 7<&0 </dev/null
+exec 6>&1
 
 # Name of the host.
-# hostname on some systems (SVR3.2, Linux) returns a bogus exit status,
+# hostname on some systems (SVR3.2, old GNU/Linux) returns a bogus exit status,
 # so uname gets run too.
 ac_hostname=`(hostname || uname -n) 2>/dev/null | sed 1q`
 
@@ -738,14 +694,14 @@ cross_compiling=no
 subdirs=
 MFLAGS=
 MAKEFLAGS=
-SHELL=${CONFIG_SHELL-/bin/sh}
 
 # Identity of this package.
 PACKAGE_NAME='sqlite'
 PACKAGE_TARNAME='sqlite'
-PACKAGE_VERSION='3.7.7.1'
-PACKAGE_STRING='sqlite 3.7.7.1'
+PACKAGE_VERSION='3.7.9'
+PACKAGE_STRING='sqlite 3.7.9'
 PACKAGE_BUGREPORT=''
+PACKAGE_URL=''
 
 # Factoring default headers for most tests.
 ac_includes_default="\
@@ -783,121 +739,122 @@ ac_includes_default="\
 # include <unistd.h>
 #endif"
 
-ac_subst_vars='SHELL
-PATH_SEPARATOR
-PACKAGE_NAME
-PACKAGE_TARNAME
-PACKAGE_VERSION
-PACKAGE_STRING
-PACKAGE_BUGREPORT
-exec_prefix
-prefix
-program_transform_name
-bindir
-sbindir
-libexecdir
-datarootdir
-datadir
-sysconfdir
-sharedstatedir
-localstatedir
-includedir
-oldincludedir
-docdir
-infodir
-htmldir
-dvidir
-pdfdir
-psdir
-libdir
-localedir
-mandir
-DEFS
-ECHO_C
-ECHO_N
-ECHO_T
-LIBS
-build_alias
-host_alias
-target_alias
-LIBTOOL
-build
-build_cpu
-build_vendor
-build_os
-host
-host_cpu
-host_vendor
-host_os
-CC
-CFLAGS
-LDFLAGS
-CPPFLAGS
-ac_ct_CC
-EXEEXT
-OBJEXT
-SED
-GREP
-EGREP
-FGREP
-LD
-DUMPBIN
-ac_ct_DUMPBIN
-NM
-LN_S
-OBJDUMP
-AR
-STRIP
-RANLIB
-lt_ECHO
-DSYMUTIL
-NMEDIT
-LIPO
-OTOOL
-OTOOL64
-CPP
-INSTALL_PROGRAM
-INSTALL_SCRIPT
-INSTALL_DATA
-AWK
-TCLSH_CMD
-TCLLIBDIR
-program_prefix
-VERSION
-RELEASE
-VERSION_NUMBER
-BUILD_CC
-SQLITE_THREADSAFE
-XTHREADCONNECT
-ALLOWRELEASE
-TEMP_STORE
-BUILD_EXEEXT
-SQLITE_OS_UNIX
-SQLITE_OS_WIN
-SQLITE_OS_OS2
-TARGET_EXEEXT
-TCL_VERSION
-TCL_BIN_DIR
-TCL_SRC_DIR
-TCL_LIBS
-TCL_INCLUDE_SPEC
-TCL_LIB_FILE
-TCL_LIB_FLAG
-TCL_LIB_SPEC
-TCL_STUB_LIB_FILE
-TCL_STUB_LIB_FLAG
-TCL_STUB_LIB_SPEC
-HAVE_TCL
-TARGET_READLINE_LIBS
-TARGET_READLINE_INC
-TARGET_HAVE_READLINE
-TARGET_DEBUG
-USE_AMALGAMATION
-OPT_FEATURE_FLAGS
-USE_GCOV
-BUILD_CFLAGS
+ac_subst_vars='LTLIBOBJS
 LIBOBJS
-LTLIBOBJS'
+BUILD_CFLAGS
+USE_GCOV
+OPT_FEATURE_FLAGS
+USE_AMALGAMATION
+TARGET_DEBUG
+TARGET_HAVE_READLINE
+TARGET_READLINE_INC
+TARGET_READLINE_LIBS
+HAVE_TCL
+TCL_STUB_LIB_SPEC
+TCL_STUB_LIB_FLAG
+TCL_STUB_LIB_FILE
+TCL_LIB_SPEC
+TCL_LIB_FLAG
+TCL_LIB_FILE
+TCL_INCLUDE_SPEC
+TCL_LIBS
+TCL_SRC_DIR
+TCL_BIN_DIR
+TCL_VERSION
+TARGET_EXEEXT
+SQLITE_OS_OS2
+SQLITE_OS_WIN
+SQLITE_OS_UNIX
+BUILD_EXEEXT
+TEMP_STORE
+ALLOWRELEASE
+XTHREADCONNECT
+SQLITE_THREADSAFE
+BUILD_CC
+VERSION_NUMBER
+RELEASE
+VERSION
+program_prefix
+TCLLIBDIR
+TCLSH_CMD
+AWK
+INSTALL_DATA
+INSTALL_SCRIPT
+INSTALL_PROGRAM
+CPP
+OTOOL64
+OTOOL
+LIPO
+NMEDIT
+DSYMUTIL
+lt_ECHO
+RANLIB
+STRIP
+AR
+OBJDUMP
+LN_S
+NM
+ac_ct_DUMPBIN
+DUMPBIN
+LD
+FGREP
+EGREP
+GREP
+SED
+OBJEXT
+EXEEXT
+ac_ct_CC
+CPPFLAGS
+LDFLAGS
+CFLAGS
+CC
+host_os
+host_vendor
+host_cpu
+host
+build_os
+build_vendor
+build_cpu
+build
+LIBTOOL
+target_alias
+host_alias
+build_alias
+LIBS
+ECHO_T
+ECHO_N
+ECHO_C
+DEFS
+mandir
+localedir
+libdir
+psdir
+pdfdir
+dvidir
+htmldir
+infodir
+docdir
+oldincludedir
+includedir
+localstatedir
+sharedstatedir
+sysconfdir
+datadir
+datarootdir
+libexecdir
+sbindir
+bindir
+program_transform_name
+prefix
+exec_prefix
+PACKAGE_URL
+PACKAGE_BUGREPORT
+PACKAGE_STRING
+PACKAGE_VERSION
+PACKAGE_TARNAME
+PACKAGE_NAME
+PATH_SEPARATOR
+SHELL'
 ac_subst_files=''
 ac_user_opts='
 enable_option_checking
@@ -995,8 +952,9 @@ do
   fi
 
   case $ac_option in
-  *=*)	ac_optarg=`expr "X$ac_option" : '[^=]*=\(.*\)'` ;;
-  *)	ac_optarg=yes ;;
+  *=?*) ac_optarg=`expr "X$ac_option" : '[^=]*=\(.*\)'` ;;
+  *=)   ac_optarg= ;;
+  *)    ac_optarg=yes ;;
   esac
 
   # Accept the important Cygnus configure options, so we can diagnose typos.
@@ -1041,8 +999,7 @@ do
     ac_useropt=`expr "x$ac_option" : 'x-*disable-\(.*\)'`
     # Reject names that are not valid shell variable names.
     expr "x$ac_useropt" : ".*[^-+._$as_cr_alnum]" >/dev/null &&
-      { $as_echo "$as_me: error: invalid feature name: $ac_useropt" >&2
-   { (exit 1); exit 1; }; }
+      as_fn_error $? "invalid feature name: $ac_useropt"
     ac_useropt_orig=$ac_useropt
     ac_useropt=`$as_echo "$ac_useropt" | sed 's/[-+.]/_/g'`
     case $ac_user_opts in
@@ -1068,8 +1025,7 @@ do
     ac_useropt=`expr "x$ac_option" : 'x-*enable-\([^=]*\)'`
     # Reject names that are not valid shell variable names.
     expr "x$ac_useropt" : ".*[^-+._$as_cr_alnum]" >/dev/null &&
-      { $as_echo "$as_me: error: invalid feature name: $ac_useropt" >&2
-   { (exit 1); exit 1; }; }
+      as_fn_error $? "invalid feature name: $ac_useropt"
     ac_useropt_orig=$ac_useropt
     ac_useropt=`$as_echo "$ac_useropt" | sed 's/[-+.]/_/g'`
     case $ac_user_opts in
@@ -1273,8 +1229,7 @@ do
     ac_useropt=`expr "x$ac_option" : 'x-*with-\([^=]*\)'`
     # Reject names that are not valid shell variable names.
     expr "x$ac_useropt" : ".*[^-+._$as_cr_alnum]" >/dev/null &&
-      { $as_echo "$as_me: error: invalid package name: $ac_useropt" >&2
-   { (exit 1); exit 1; }; }
+      as_fn_error $? "invalid package name: $ac_useropt"
     ac_useropt_orig=$ac_useropt
     ac_useropt=`$as_echo "$ac_useropt" | sed 's/[-+.]/_/g'`
     case $ac_user_opts in
@@ -1290,8 +1245,7 @@ do
     ac_useropt=`expr "x$ac_option" : 'x-*without-\(.*\)'`
     # Reject names that are not valid shell variable names.
     expr "x$ac_useropt" : ".*[^-+._$as_cr_alnum]" >/dev/null &&
-      { $as_echo "$as_me: error: invalid package name: $ac_useropt" >&2
-   { (exit 1); exit 1; }; }
+      as_fn_error $? "invalid package name: $ac_useropt"
     ac_useropt_orig=$ac_useropt
     ac_useropt=`$as_echo "$ac_useropt" | sed 's/[-+.]/_/g'`
     case $ac_user_opts in
@@ -1321,17 +1275,17 @@ do
   | --x-librar=* | --x-libra=* | --x-libr=* | --x-lib=* | --x-li=* | --x-l=*)
     x_libraries=$ac_optarg ;;
 
-  -*) { $as_echo "$as_me: error: unrecognized option: $ac_option
-Try \`$0 --help' for more information." >&2
-   { (exit 1); exit 1; }; }
+  -*) as_fn_error $? "unrecognized option: \`$ac_option'
+Try \`$0 --help' for more information"
     ;;
 
   *=*)
     ac_envvar=`expr "x$ac_option" : 'x\([^=]*\)='`
     # Reject names that are not valid shell variable names.
-    expr "x$ac_envvar" : ".*[^_$as_cr_alnum]" >/dev/null &&
-      { $as_echo "$as_me: error: invalid variable name: $ac_envvar" >&2
-   { (exit 1); exit 1; }; }
+    case $ac_envvar in #(
+      '' | [0-9]* | *[!_$as_cr_alnum]* )
+      as_fn_error $? "invalid variable name: \`$ac_envvar'" ;;
+    esac
     eval $ac_envvar=\$ac_optarg
     export $ac_envvar ;;
 
@@ -1348,16 +1302,14 @@ done
 
 if test -n "$ac_prev"; then
   ac_option=--`echo $ac_prev | sed 's/_/-/g'`
-  { $as_echo "$as_me: error: missing argument to $ac_option" >&2
-   { (exit 1); exit 1; }; }
+  as_fn_error $? "missing argument to $ac_option"
 fi
 
 if test -n "$ac_unrecognized_opts"; then
   case $enable_option_checking in
     no) ;;
-    fatal) { $as_echo "$as_me: error: Unrecognized options: $ac_unrecognized_opts" >&2
-   { (exit 1); exit 1; }; } ;;
-    *)     $as_echo "$as_me: WARNING: Unrecognized options: $ac_unrecognized_opts" >&2 ;;
+    fatal) as_fn_error $? "unrecognized options: $ac_unrecognized_opts" ;;
+    *)     $as_echo "$as_me: WARNING: unrecognized options: $ac_unrecognized_opts" >&2 ;;
   esac
 fi
 
@@ -1379,8 +1331,7 @@ do
     [\\/$]* | ?:[\\/]* )  continue;;
     NONE | '' ) case $ac_var in *prefix ) continue;; esac;;
   esac
-  { $as_echo "$as_me: error: expected an absolute directory name for --$ac_var: $ac_val" >&2
-   { (exit 1); exit 1; }; }
+  as_fn_error $? "expected an absolute directory name for --$ac_var: $ac_val"
 done
 
 # There might be people who depend on the old broken behavior: `$host'
@@ -1394,8 +1345,8 @@ target=$target_alias
 if test "x$host_alias" != x; then
   if test "x$build_alias" = x; then
     cross_compiling=maybe
-    $as_echo "$as_me: WARNING: If you wanted to set the --build type, don't use --host.
-    If a cross compiler is detected then cross compile mode will be used." >&2
+    $as_echo "$as_me: WARNING: if you wanted to set the --build type, don't use --host.
+    If a cross compiler is detected then cross compile mode will be used" >&2
   elif test "x$build_alias" != "x$host_alias"; then
     cross_compiling=yes
   fi
@@ -1410,11 +1361,9 @@ test "$silent" = yes && exec 6>/dev/null
 ac_pwd=`pwd` && test -n "$ac_pwd" &&
 ac_ls_di=`ls -di .` &&
 ac_pwd_ls_di=`cd "$ac_pwd" && ls -di .` ||
-  { $as_echo "$as_me: error: Working directory cannot be determined" >&2
-   { (exit 1); exit 1; }; }
+  as_fn_error $? "working directory cannot be determined"
 test "X$ac_ls_di" = "X$ac_pwd_ls_di" ||
-  { $as_echo "$as_me: error: pwd does not report name of working directory" >&2
-   { (exit 1); exit 1; }; }
+  as_fn_error $? "pwd does not report name of working directory"
 
 
 # Find the source files, if location was not specified.
@@ -1453,13 +1402,11 @@ else
 fi
 if test ! -r "$srcdir/$ac_unique_file"; then
   test "$ac_srcdir_defaulted" = yes && srcdir="$ac_confdir or .."
-  { $as_echo "$as_me: error: cannot find sources ($ac_unique_file) in $srcdir" >&2
-   { (exit 1); exit 1; }; }
+  as_fn_error $? "cannot find sources ($ac_unique_file) in $srcdir"
 fi
 ac_msg="sources are in $srcdir, but \`cd $srcdir' does not work"
 ac_abs_confdir=`(
-	cd "$srcdir" && test -r "./$ac_unique_file" || { $as_echo "$as_me: error: $ac_msg" >&2
-   { (exit 1); exit 1; }; }
+	cd "$srcdir" && test -r "./$ac_unique_file" || as_fn_error $? "$ac_msg"
 	pwd)`
 # When building in place, set srcdir=.
 if test "$ac_abs_confdir" = "$ac_pwd"; then
@@ -1485,7 +1432,7 @@ if test "$ac_init_help" = "long"; then
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-\`configure' configures sqlite 3.7.7.1 to adapt to many kinds of systems.
+\`configure' configures sqlite 3.7.9 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1499,7 +1446,7 @@ Configuration:
       --help=short        display options specific to this package
       --help=recursive    display the short help of all the included packages
   -V, --version           display version information and exit
-  -q, --quiet, --silent   do not print \`checking...' messages
+  -q, --quiet, --silent   do not print \`checking ...' messages
       --cache-file=FILE   cache test results in FILE [disabled]
   -C, --config-cache      alias for \`--cache-file=config.cache'
   -n, --no-create         do not create output files
@@ -1550,7 +1497,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of sqlite 3.7.7.1:";;
+     short | recursive ) echo "Configuration of sqlite 3.7.9:";;
    esac
   cat <<\_ACEOF
 
@@ -1596,7 +1543,7 @@ Some influential environment variables:
   LDFLAGS     linker flags, e.g. -L<lib dir> if you have libraries in a
               nonstandard directory <lib dir>
   LIBS        libraries to pass to the linker, e.g. -l<library>
-  CPPFLAGS    C/C++/Objective C preprocessor flags, e.g. -I<include dir> if
+  CPPFLAGS    (Objective) C/C++ preprocessor flags, e.g. -I<include dir> if
               you have headers in a nonstandard directory <include dir>
   CPP         C preprocessor
   TCLLIBDIR   Where to install tcl plugin
@@ -1604,6 +1551,7 @@ Some influential environment variables:
 Use these variables to override the choices made by `configure' or to help
 it to find libraries and programs with nonstandard names/locations.
 
+Report bugs to the package provider.
 _ACEOF
 ac_status=$?
 fi
@@ -1666,22 +1614,427 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-sqlite configure 3.7.7.1
-generated by GNU Autoconf 2.62
+sqlite configure 3.7.9
+generated by GNU Autoconf 2.67
 
-Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001,
-2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
+Copyright (C) 2010 Free Software Foundation, Inc.
 This configure script is free software; the Free Software Foundation
 gives unlimited permission to copy, distribute and modify it.
 _ACEOF
   exit
 fi
+
+## ------------------------ ##
+## Autoconf initialization. ##
+## ------------------------ ##
+
+# ac_fn_c_try_compile LINENO
+# --------------------------
+# Try to compile conftest.$ac_ext, and return whether this succeeded.
+ac_fn_c_try_compile ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  rm -f conftest.$ac_objext
+  if { { ac_try="$ac_compile"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_compile") 2>conftest.err
+  ac_status=$?
+  if test -s conftest.err; then
+    grep -v '^ *+' conftest.err >conftest.er1
+    cat conftest.er1 >&5
+    mv -f conftest.er1 conftest.err
+  fi
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && {
+	 test -z "$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       } && test -s conftest.$ac_objext; then :
+  ac_retval=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+	ac_retval=1
+fi
+  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
+  as_fn_set_status $ac_retval
+
+} # ac_fn_c_try_compile
+
+# ac_fn_c_try_link LINENO
+# -----------------------
+# Try to link conftest.$ac_ext, and return whether this succeeded.
+ac_fn_c_try_link ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  rm -f conftest.$ac_objext conftest$ac_exeext
+  if { { ac_try="$ac_link"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_link") 2>conftest.err
+  ac_status=$?
+  if test -s conftest.err; then
+    grep -v '^ *+' conftest.err >conftest.er1
+    cat conftest.er1 >&5
+    mv -f conftest.er1 conftest.err
+  fi
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && {
+	 test -z "$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       } && test -s conftest$ac_exeext && {
+	 test "$cross_compiling" = yes ||
+	 $as_test_x conftest$ac_exeext
+       }; then :
+  ac_retval=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+	ac_retval=1
+fi
+  # Delete the IPA/IPO (Inter Procedural Analysis/Optimization) information
+  # created by the PGI compiler (conftest_ipa8_conftest.oo), as it would
+  # interfere with the next link command; also delete a directory that is
+  # left behind by Apple's compiler.  We do this before executing the actions.
+  rm -rf conftest.dSYM conftest_ipa8_conftest.oo
+  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
+  as_fn_set_status $ac_retval
+
+} # ac_fn_c_try_link
+
+# ac_fn_c_check_header_compile LINENO HEADER VAR INCLUDES
+# -------------------------------------------------------
+# Tests whether HEADER exists and can be compiled using the include files in
+# INCLUDES, setting the cache variable VAR accordingly.
+ac_fn_c_check_header_compile ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
+$as_echo_n "checking for $2... " >&6; }
+if eval "test \"\${$3+set}\"" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$4
+#include <$2>
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  eval "$3=yes"
+else
+  eval "$3=no"
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+eval ac_res=\$$3
+	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+$as_echo "$ac_res" >&6; }
+  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
+
+} # ac_fn_c_check_header_compile
+
+# ac_fn_c_try_cpp LINENO
+# ----------------------
+# Try to preprocess conftest.$ac_ext, and return whether this succeeded.
+ac_fn_c_try_cpp ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  if { { ac_try="$ac_cpp conftest.$ac_ext"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_cpp conftest.$ac_ext") 2>conftest.err
+  ac_status=$?
+  if test -s conftest.err; then
+    grep -v '^ *+' conftest.err >conftest.er1
+    cat conftest.er1 >&5
+    mv -f conftest.er1 conftest.err
+  fi
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } > conftest.i && {
+	 test -z "$ac_c_preproc_warn_flag$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       }; then :
+  ac_retval=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+    ac_retval=1
+fi
+  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
+  as_fn_set_status $ac_retval
+
+} # ac_fn_c_try_cpp
+
+# ac_fn_c_try_run LINENO
+# ----------------------
+# Try to link conftest.$ac_ext, and return whether this succeeded. Assumes
+# that executables *can* be run.
+ac_fn_c_try_run ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  if { { ac_try="$ac_link"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_link") 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && { ac_try='./conftest$ac_exeext'
+  { { case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_try") 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; }; then :
+  ac_retval=0
+else
+  $as_echo "$as_me: program exited with status $ac_status" >&5
+       $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+       ac_retval=$ac_status
+fi
+  rm -rf conftest.dSYM conftest_ipa8_conftest.oo
+  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
+  as_fn_set_status $ac_retval
+
+} # ac_fn_c_try_run
+
+# ac_fn_c_check_func LINENO FUNC VAR
+# ----------------------------------
+# Tests whether FUNC exists, setting the cache variable VAR accordingly
+ac_fn_c_check_func ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
+$as_echo_n "checking for $2... " >&6; }
+if eval "test \"\${$3+set}\"" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+/* Define $2 to an innocuous variant, in case <limits.h> declares $2.
+   For example, HP-UX 11i <limits.h> declares gettimeofday.  */
+#define $2 innocuous_$2
+
+/* System header to define __stub macros and hopefully few prototypes,
+    which can conflict with char $2 (); below.
+    Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
+    <limits.h> exists even on freestanding compilers.  */
+
+#ifdef __STDC__
+# include <limits.h>
+#else
+# include <assert.h>
+#endif
+
+#undef $2
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char $2 ();
+/* The GNU C library defines this for functions which it implements
+    to always fail with ENOSYS.  Some functions are actually named
+    something starting with __ and the normal name is an alias.  */
+#if defined __stub_$2 || defined __stub___$2
+choke me
+#endif
+
+int
+main ()
+{
+return $2 ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  eval "$3=yes"
+else
+  eval "$3=no"
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+fi
+eval ac_res=\$$3
+	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+$as_echo "$ac_res" >&6; }
+  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
+
+} # ac_fn_c_check_func
+
+# ac_fn_c_check_type LINENO TYPE VAR INCLUDES
+# -------------------------------------------
+# Tests whether TYPE exists after having included INCLUDES, setting cache
+# variable VAR accordingly.
+ac_fn_c_check_type ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
+$as_echo_n "checking for $2... " >&6; }
+if eval "test \"\${$3+set}\"" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  eval "$3=no"
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$4
+int
+main ()
+{
+if (sizeof ($2))
+	 return 0;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$4
+int
+main ()
+{
+if (sizeof (($2)))
+	    return 0;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+
+else
+  eval "$3=yes"
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+eval ac_res=\$$3
+	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+$as_echo "$ac_res" >&6; }
+  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
+
+} # ac_fn_c_check_type
+
+# ac_fn_c_check_header_mongrel LINENO HEADER VAR INCLUDES
+# -------------------------------------------------------
+# Tests whether HEADER exists, giving a warning if it cannot be compiled using
+# the include files in INCLUDES and setting the cache variable VAR
+# accordingly.
+ac_fn_c_check_header_mongrel ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  if eval "test \"\${$3+set}\"" = set; then :
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
+$as_echo_n "checking for $2... " >&6; }
+if eval "test \"\${$3+set}\"" = set; then :
+  $as_echo_n "(cached) " >&6
+fi
+eval ac_res=\$$3
+	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+$as_echo "$ac_res" >&6; }
+else
+  # Is the header compilable?
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking $2 usability" >&5
+$as_echo_n "checking $2 usability... " >&6; }
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$4
+#include <$2>
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ac_header_compiler=yes
+else
+  ac_header_compiler=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_header_compiler" >&5
+$as_echo "$ac_header_compiler" >&6; }
+
+# Is the header present?
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking $2 presence" >&5
+$as_echo_n "checking $2 presence... " >&6; }
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <$2>
+_ACEOF
+if ac_fn_c_try_cpp "$LINENO"; then :
+  ac_header_preproc=yes
+else
+  ac_header_preproc=no
+fi
+rm -f conftest.err conftest.i conftest.$ac_ext
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_header_preproc" >&5
+$as_echo "$ac_header_preproc" >&6; }
+
+# So?  What about this header?
+case $ac_header_compiler:$ac_header_preproc:$ac_c_preproc_warn_flag in #((
+  yes:no: )
+    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2: accepted by the compiler, rejected by the preprocessor!" >&5
+$as_echo "$as_me: WARNING: $2: accepted by the compiler, rejected by the preprocessor!" >&2;}
+    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2: proceeding with the compiler's result" >&5
+$as_echo "$as_me: WARNING: $2: proceeding with the compiler's result" >&2;}
+    ;;
+  no:yes:* )
+    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2: present but cannot be compiled" >&5
+$as_echo "$as_me: WARNING: $2: present but cannot be compiled" >&2;}
+    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2:     check for missing prerequisite headers?" >&5
+$as_echo "$as_me: WARNING: $2:     check for missing prerequisite headers?" >&2;}
+    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2: see the Autoconf documentation" >&5
+$as_echo "$as_me: WARNING: $2: see the Autoconf documentation" >&2;}
+    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2:     section \"Present But Cannot Be Compiled\"" >&5
+$as_echo "$as_me: WARNING: $2:     section \"Present But Cannot Be Compiled\"" >&2;}
+    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2: proceeding with the compiler's result" >&5
+$as_echo "$as_me: WARNING: $2: proceeding with the compiler's result" >&2;}
+    ;;
+esac
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
+$as_echo_n "checking for $2... " >&6; }
+if eval "test \"\${$3+set}\"" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  eval "$3=\$ac_header_compiler"
+fi
+eval ac_res=\$$3
+	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+$as_echo "$ac_res" >&6; }
+fi
+  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
+
+} # ac_fn_c_check_header_mongrel
 cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
-It was created by sqlite $as_me 3.7.7.1, which was
-generated by GNU Autoconf 2.62.  Invocation command line was
+It was created by sqlite $as_me 3.7.9, which was
+generated by GNU Autoconf 2.67.  Invocation command line was
 
   $ $0 $@
 
@@ -1717,8 +2070,8 @@ for as_dir in $PATH
 do
   IFS=$as_save_IFS
   test -z "$as_dir" && as_dir=.
-  $as_echo "PATH: $as_dir"
-done
+    $as_echo "PATH: $as_dir"
+  done
 IFS=$as_save_IFS
 
 } >&5
@@ -1755,9 +2108,9 @@ do
       ac_arg=`$as_echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
     esac
     case $ac_pass in
-    1) ac_configure_args0="$ac_configure_args0 '$ac_arg'" ;;
+    1) as_fn_append ac_configure_args0 " '$ac_arg'" ;;
     2)
-      ac_configure_args1="$ac_configure_args1 '$ac_arg'"
+      as_fn_append ac_configure_args1 " '$ac_arg'"
       if test $ac_must_keep_next = true; then
 	ac_must_keep_next=false # Got value, back to normal.
       else
@@ -1773,13 +2126,13 @@ do
 	  -* ) ac_must_keep_next=true ;;
 	esac
       fi
-      ac_configure_args="$ac_configure_args '$ac_arg'"
+      as_fn_append ac_configure_args " '$ac_arg'"
       ;;
     esac
   done
 done
-$as_unset ac_configure_args0 || test "${ac_configure_args0+set}" != set || { ac_configure_args0=; export ac_configure_args0; }
-$as_unset ac_configure_args1 || test "${ac_configure_args1+set}" != set || { ac_configure_args1=; export ac_configure_args1; }
+{ ac_configure_args0=; unset ac_configure_args0;}
+{ ac_configure_args1=; unset ac_configure_args1;}
 
 # When interrupted or exit'd, cleanup temporary files, and complete
 # config.log.  We remove comments because anyway the quotes in there
@@ -1791,11 +2144,9 @@ trap 'exit_status=$?
   {
     echo
 
-    cat <<\_ASBOX
-## ---------------- ##
+    $as_echo "## ---------------- ##
 ## Cache variables. ##
-## ---------------- ##
-_ASBOX
+## ---------------- ##"
     echo
     # The following way of writing the cache mishandles newlines in values,
 (
@@ -1804,13 +2155,13 @@ _ASBOX
     case $ac_val in #(
     *${as_nl}*)
       case $ac_var in #(
-      *_cv_*) { $as_echo "$as_me:$LINENO: WARNING: Cache variable $ac_var contains a newline." >&5
-$as_echo "$as_me: WARNING: Cache variable $ac_var contains a newline." >&2;} ;;
+      *_cv_*) { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: cache variable $ac_var contains a newline" >&5
+$as_echo "$as_me: WARNING: cache variable $ac_var contains a newline" >&2;} ;;
       esac
       case $ac_var in #(
       _ | IFS | as_nl) ;; #(
       BASH_ARGV | BASH_SOURCE) eval $ac_var= ;; #(
-      *) $as_unset $ac_var ;;
+      *) { eval $ac_var=; unset $ac_var;} ;;
       esac ;;
     esac
   done
@@ -1829,11 +2180,9 @@ $as_echo "$as_me: WARNING: Cache variable $ac_var contains a newline." >&2;} ;;
 )
     echo
 
-    cat <<\_ASBOX
-## ----------------- ##
+    $as_echo "## ----------------- ##
 ## Output variables. ##
-## ----------------- ##
-_ASBOX
+## ----------------- ##"
     echo
     for ac_var in $ac_subst_vars
     do
@@ -1846,11 +2195,9 @@ _ASBOX
     echo
 
     if test -n "$ac_subst_files"; then
-      cat <<\_ASBOX
-## ------------------- ##
+      $as_echo "## ------------------- ##
 ## File substitutions. ##
-## ------------------- ##
-_ASBOX
+## ------------------- ##"
       echo
       for ac_var in $ac_subst_files
       do
@@ -1864,11 +2211,9 @@ _ASBOX
     fi
 
     if test -s confdefs.h; then
-      cat <<\_ASBOX
-## ----------- ##
+      $as_echo "## ----------- ##
 ## confdefs.h. ##
-## ----------- ##
-_ASBOX
+## ----------- ##"
       echo
       cat confdefs.h
       echo
@@ -1882,46 +2227,53 @@ _ASBOX
     exit $exit_status
 ' 0
 for ac_signal in 1 2 13 15; do
-  trap 'ac_signal='$ac_signal'; { (exit 1); exit 1; }' $ac_signal
+  trap 'ac_signal='$ac_signal'; as_fn_exit 1' $ac_signal
 done
 ac_signal=0
 
 # confdefs.h avoids OS command line length limits that DEFS can exceed.
 rm -f -r conftest* confdefs.h
 
+$as_echo "/* confdefs.h */" > confdefs.h
+
 # Predefined preprocessor variables.
 
 cat >>confdefs.h <<_ACEOF
 #define PACKAGE_NAME "$PACKAGE_NAME"
 _ACEOF
 
-
 cat >>confdefs.h <<_ACEOF
 #define PACKAGE_TARNAME "$PACKAGE_TARNAME"
 _ACEOF
 
-
 cat >>confdefs.h <<_ACEOF
 #define PACKAGE_VERSION "$PACKAGE_VERSION"
 _ACEOF
 
-
 cat >>confdefs.h <<_ACEOF
 #define PACKAGE_STRING "$PACKAGE_STRING"
 _ACEOF
 
-
 cat >>confdefs.h <<_ACEOF
 #define PACKAGE_BUGREPORT "$PACKAGE_BUGREPORT"
 _ACEOF
 
+cat >>confdefs.h <<_ACEOF
+#define PACKAGE_URL "$PACKAGE_URL"
+_ACEOF
+
 
 # Let the site file select an alternate cache file if it wants to.
 # Prefer an explicitly selected file to automatically selected ones.
 ac_site_file1=NONE
 ac_site_file2=NONE
 if test -n "$CONFIG_SITE"; then
-  ac_site_file1=$CONFIG_SITE
+  # We do not want a PATH search for config.site.
+  case $CONFIG_SITE in #((
+    -*)  ac_site_file1=./$CONFIG_SITE;;
+    */*) ac_site_file1=$CONFIG_SITE;;
+    *)   ac_site_file1=./$CONFIG_SITE;;
+  esac
 elif test "x$prefix" != xNONE; then
   ac_site_file1=$prefix/share/config.site
   ac_site_file2=$prefix/etc/config.site
@@ -1932,19 +2284,23 @@ fi
 for ac_site_file in "$ac_site_file1" "$ac_site_file2"
 do
   test "x$ac_site_file" = xNONE && continue
-  if test -r "$ac_site_file"; then
-    { $as_echo "$as_me:$LINENO: loading site script $ac_site_file" >&5
+  if test /dev/null != "$ac_site_file" && test -r "$ac_site_file"; then
+    { $as_echo "$as_me:${as_lineno-$LINENO}: loading site script $ac_site_file" >&5
 $as_echo "$as_me: loading site script $ac_site_file" >&6;}
     sed 's/^/| /' "$ac_site_file" >&5
-    . "$ac_site_file"
+    . "$ac_site_file" \
+      || { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "failed to load site script $ac_site_file
+See \`config.log' for more details" "$LINENO" 5 ; }
   fi
 done
 
 if test -r "$cache_file"; then
-  # Some versions of bash will fail to source /dev/null (special
-  # files actually), so we avoid doing that.
-  if test -f "$cache_file"; then
-    { $as_echo "$as_me:$LINENO: loading cache $cache_file" >&5
+  # Some versions of bash will fail to source /dev/null (special files
+  # actually), so we avoid doing that.  DJGPP emulates it as a regular file.
+  if test /dev/null != "$cache_file" && test -f "$cache_file"; then
+    { $as_echo "$as_me:${as_lineno-$LINENO}: loading cache $cache_file" >&5
 $as_echo "$as_me: loading cache $cache_file" >&6;}
     case $cache_file in
       [\\/]* | ?:[\\/]* ) . "$cache_file";;
@@ -1952,7 +2308,7 @@ $as_echo "$as_me: loading cache $cache_file" >&6;}
     esac
   fi
 else
-  { $as_echo "$as_me:$LINENO: creating cache $cache_file" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: creating cache $cache_file" >&5
 $as_echo "$as_me: creating cache $cache_file" >&6;}
   >$cache_file
 fi
@@ -1967,11 +2323,11 @@ for ac_var in $ac_precious_vars; do
   eval ac_new_val=\$ac_env_${ac_var}_value
   case $ac_old_set,$ac_new_set in
     set,)
-      { $as_echo "$as_me:$LINENO: error: \`$ac_var' was set to \`$ac_old_val' in the previous run" >&5
+      { $as_echo "$as_me:${as_lineno-$LINENO}: error: \`$ac_var' was set to \`$ac_old_val' in the previous run" >&5
 $as_echo "$as_me: error: \`$ac_var' was set to \`$ac_old_val' in the previous run" >&2;}
       ac_cache_corrupted=: ;;
     ,set)
-      { $as_echo "$as_me:$LINENO: error: \`$ac_var' was not set in the previous run" >&5
+      { $as_echo "$as_me:${as_lineno-$LINENO}: error: \`$ac_var' was not set in the previous run" >&5
 $as_echo "$as_me: error: \`$ac_var' was not set in the previous run" >&2;}
       ac_cache_corrupted=: ;;
     ,);;
@@ -1981,17 +2337,17 @@ $as_echo "$as_me: error: \`$ac_var' was not set in the previous run" >&2;}
 	ac_old_val_w=`echo x $ac_old_val`
 	ac_new_val_w=`echo x $ac_new_val`
 	if test "$ac_old_val_w" != "$ac_new_val_w"; then
-	  { $as_echo "$as_me:$LINENO: error: \`$ac_var' has changed since the previous run:" >&5
+	  { $as_echo "$as_me:${as_lineno-$LINENO}: error: \`$ac_var' has changed since the previous run:" >&5
 $as_echo "$as_me: error: \`$ac_var' has changed since the previous run:" >&2;}
 	  ac_cache_corrupted=:
 	else
-	  { $as_echo "$as_me:$LINENO: warning: ignoring whitespace changes in \`$ac_var' since the previous run:" >&5
+	  { $as_echo "$as_me:${as_lineno-$LINENO}: warning: ignoring whitespace changes in \`$ac_var' since the previous run:" >&5
 $as_echo "$as_me: warning: ignoring whitespace changes in \`$ac_var' since the previous run:" >&2;}
 	  eval $ac_var=\$ac_old_val
 	fi
-	{ $as_echo "$as_me:$LINENO:   former value:  \`$ac_old_val'" >&5
+	{ $as_echo "$as_me:${as_lineno-$LINENO}:   former value:  \`$ac_old_val'" >&5
 $as_echo "$as_me:   former value:  \`$ac_old_val'" >&2;}
-	{ $as_echo "$as_me:$LINENO:   current value: \`$ac_new_val'" >&5
+	{ $as_echo "$as_me:${as_lineno-$LINENO}:   current value: \`$ac_new_val'" >&5
 $as_echo "$as_me:   current value: \`$ac_new_val'" >&2;}
       fi;;
   esac
@@ -2003,41 +2359,20 @@ $as_echo "$as_me:   current value: \`$ac_new_val'" >&2;}
     esac
     case " $ac_configure_args " in
       *" '$ac_arg' "*) ;; # Avoid dups.  Use of quotes ensures accuracy.
-      *) ac_configure_args="$ac_configure_args '$ac_arg'" ;;
+      *) as_fn_append ac_configure_args " '$ac_arg'" ;;
     esac
   fi
 done
 if $ac_cache_corrupted; then
-  { $as_echo "$as_me:$LINENO: error: changes in the environment can compromise the build" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+  { $as_echo "$as_me:${as_lineno-$LINENO}: error: changes in the environment can compromise the build" >&5
 $as_echo "$as_me: error: changes in the environment can compromise the build" >&2;}
-  { { $as_echo "$as_me:$LINENO: error: run \`make distclean' and/or \`rm $cache_file' and start over" >&5
-$as_echo "$as_me: error: run \`make distclean' and/or \`rm $cache_file' and start over" >&2;}
-   { (exit 1); exit 1; }; }
+  as_fn_error $? "run \`make distclean' and/or \`rm $cache_file' and start over" "$LINENO" 5
 fi
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
+## -------------------- ##
+## Main body of script. ##
+## -------------------- ##
 
 ac_ext=c
 ac_cpp='$CPP $CPPFLAGS'
@@ -2049,15 +2384,10 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 sqlite_version_sanity_check=`cat $srcdir/VERSION | tr -d '\n'`
 if test "$PACKAGE_VERSION" != "$sqlite_version_sanity_check" ; then
-{ { $as_echo "$as_me:$LINENO: error: configure script is out of date:
+as_fn_error $? "configure script is out of date:
  configure \$PACKAGE_VERSION = $PACKAGE_VERSION
  top level VERSION file     = $sqlite_version_sanity_check
-please regen with autoconf" >&5
-$as_echo "$as_me: error: configure script is out of date:
- configure \$PACKAGE_VERSION = $PACKAGE_VERSION
- top level VERSION file     = $sqlite_version_sanity_check
-please regen with autoconf" >&2;}
-   { (exit 1); exit 1; }; }
+please regen with autoconf" "$LINENO" 5
 fi
 
 # The following RCS revision string applies to configure.in
@@ -2068,7 +2398,7 @@ fi
 #
 case `pwd` in
   *\ * | *\	*)
-    { $as_echo "$as_me:$LINENO: WARNING: Libtool does not cope well with whitespace in \`pwd\`" >&5
+    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Libtool does not cope well with whitespace in \`pwd\`" >&5
 $as_echo "$as_me: WARNING: Libtool does not cope well with whitespace in \`pwd\`" >&2;} ;;
 esac
 
@@ -2108,9 +2438,7 @@ for ac_dir in "$srcdir" "$srcdir/.." "$srcdir/../.."; do
   fi
 done
 if test -z "$ac_aux_dir"; then
-  { { $as_echo "$as_me:$LINENO: error: cannot find install-sh or install.sh in \"$srcdir\" \"$srcdir/..\" \"$srcdir/../..\"" >&5
-$as_echo "$as_me: error: cannot find install-sh or install.sh in \"$srcdir\" \"$srcdir/..\" \"$srcdir/../..\"" >&2;}
-   { (exit 1); exit 1; }; }
+  as_fn_error $? "cannot find install-sh, install.sh, or shtool in \"$srcdir\" \"$srcdir/..\" \"$srcdir/../..\"" "$LINENO" 5
 fi
 
 # These three variables are undocumented and unsupported,
@@ -2124,35 +2452,27 @@ ac_configure="$SHELL $ac_aux_dir/configure"  # Please don't use this var.
 
 # Make sure we can run config.sub.
 $SHELL "$ac_aux_dir/config.sub" sun4 >/dev/null 2>&1 ||
-  { { $as_echo "$as_me:$LINENO: error: cannot run $SHELL $ac_aux_dir/config.sub" >&5
-$as_echo "$as_me: error: cannot run $SHELL $ac_aux_dir/config.sub" >&2;}
-   { (exit 1); exit 1; }; }
+  as_fn_error $? "cannot run $SHELL $ac_aux_dir/config.sub" "$LINENO" 5
 
-{ $as_echo "$as_me:$LINENO: checking build system type" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking build system type" >&5
 $as_echo_n "checking build system type... " >&6; }
-if test "${ac_cv_build+set}" = set; then
+if test "${ac_cv_build+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_build_alias=$build_alias
 test "x$ac_build_alias" = x &&
   ac_build_alias=`$SHELL "$ac_aux_dir/config.guess"`
 test "x$ac_build_alias" = x &&
-  { { $as_echo "$as_me:$LINENO: error: cannot guess build type; you must specify one" >&5
-$as_echo "$as_me: error: cannot guess build type; you must specify one" >&2;}
-   { (exit 1); exit 1; }; }
+  as_fn_error $? "cannot guess build type; you must specify one" "$LINENO" 5
 ac_cv_build=`$SHELL "$ac_aux_dir/config.sub" $ac_build_alias` ||
-  { { $as_echo "$as_me:$LINENO: error: $SHELL $ac_aux_dir/config.sub $ac_build_alias failed" >&5
-$as_echo "$as_me: error: $SHELL $ac_aux_dir/config.sub $ac_build_alias failed" >&2;}
-   { (exit 1); exit 1; }; }
+  as_fn_error $? "$SHELL $ac_aux_dir/config.sub $ac_build_alias failed" "$LINENO" 5
 
 fi
-{ $as_echo "$as_me:$LINENO: result: $ac_cv_build" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_build" >&5
 $as_echo "$ac_cv_build" >&6; }
 case $ac_cv_build in
 *-*-*) ;;
-*) { { $as_echo "$as_me:$LINENO: error: invalid value of canonical build" >&5
-$as_echo "$as_me: error: invalid value of canonical build" >&2;}
-   { (exit 1); exit 1; }; };;
+*) as_fn_error $? "invalid value of canonical build" "$LINENO" 5 ;;
 esac
 build=$ac_cv_build
 ac_save_IFS=$IFS; IFS='-'
@@ -2168,28 +2488,24 @@ IFS=$ac_save_IFS
 case $build_os in *\ *) build_os=`echo "$build_os" | sed 's/ /-/g'`;; esac
 
 
-{ $as_echo "$as_me:$LINENO: checking host system type" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking host system type" >&5
 $as_echo_n "checking host system type... " >&6; }
-if test "${ac_cv_host+set}" = set; then
+if test "${ac_cv_host+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test "x$host_alias" = x; then
   ac_cv_host=$ac_cv_build
 else
   ac_cv_host=`$SHELL "$ac_aux_dir/config.sub" $host_alias` ||
-    { { $as_echo "$as_me:$LINENO: error: $SHELL $ac_aux_dir/config.sub $host_alias failed" >&5
-$as_echo "$as_me: error: $SHELL $ac_aux_dir/config.sub $host_alias failed" >&2;}
-   { (exit 1); exit 1; }; }
+    as_fn_error $? "$SHELL $ac_aux_dir/config.sub $host_alias failed" "$LINENO" 5
 fi
 
 fi
-{ $as_echo "$as_me:$LINENO: result: $ac_cv_host" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_host" >&5
 $as_echo "$ac_cv_host" >&6; }
 case $ac_cv_host in
 *-*-*) ;;
-*) { { $as_echo "$as_me:$LINENO: error: invalid value of canonical host" >&5
-$as_echo "$as_me: error: invalid value of canonical host" >&2;}
-   { (exit 1); exit 1; }; };;
+*) as_fn_error $? "invalid value of canonical host" "$LINENO" 5 ;;
 esac
 host=$ac_cv_host
 ac_save_IFS=$IFS; IFS='-'
@@ -2213,9 +2529,9 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
 if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}gcc", so it can be a program name with args.
 set dummy ${ac_tool_prefix}gcc; ac_word=$2
-{ $as_echo "$as_me:$LINENO: checking for $ac_word" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_CC+set}" = set; then
+if test "${ac_cv_prog_CC+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$CC"; then
@@ -2226,24 +2542,24 @@ for as_dir in $PATH
 do
   IFS=$as_save_IFS
   test -z "$as_dir" && as_dir=.
-  for ac_exec_ext in '' $ac_executable_extensions; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
   if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
     ac_cv_prog_CC="${ac_tool_prefix}gcc"
-    $as_echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
-done
+  done
 IFS=$as_save_IFS
 
 fi
 fi
 CC=$ac_cv_prog_CC
 if test -n "$CC"; then
-  { $as_echo "$as_me:$LINENO: result: $CC" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
 $as_echo "$CC" >&6; }
 else
-  { $as_echo "$as_me:$LINENO: result: no" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi
 
@@ -2253,9 +2569,9 @@ if test -z "$ac_cv_prog_CC"; then
   ac_ct_CC=$CC
   # Extract the first word of "gcc", so it can be a program name with args.
 set dummy gcc; ac_word=$2
-{ $as_echo "$as_me:$LINENO: checking for $ac_word" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_ac_ct_CC+set}" = set; then
+if test "${ac_cv_prog_ac_ct_CC+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$ac_ct_CC"; then
@@ -2266,24 +2582,24 @@ for as_dir in $PATH
 do
   IFS=$as_save_IFS
   test -z "$as_dir" && as_dir=.
-  for ac_exec_ext in '' $ac_executable_extensions; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
   if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
     ac_cv_prog_ac_ct_CC="gcc"
-    $as_echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
-done
+  done
 IFS=$as_save_IFS
 
 fi
 fi
 ac_ct_CC=$ac_cv_prog_ac_ct_CC
 if test -n "$ac_ct_CC"; then
-  { $as_echo "$as_me:$LINENO: result: $ac_ct_CC" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CC" >&5
 $as_echo "$ac_ct_CC" >&6; }
 else
-  { $as_echo "$as_me:$LINENO: result: no" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi
 
@@ -2292,12 +2608,8 @@ fi
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ $as_echo "$as_me:$LINENO: WARNING: In the future, Autoconf will not detect cross-tools
-whose name does not start with the host triplet.  If you think this
-configuration is useful to you, please write to autoconf@gnu.org." >&5
-$as_echo "$as_me: WARNING: In the future, Autoconf will not detect cross-tools
-whose name does not start with the host triplet.  If you think this
-configuration is useful to you, please write to autoconf@gnu.org." >&2;}
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     CC=$ac_ct_CC
@@ -2310,9 +2622,9 @@ if test -z "$CC"; then
           if test -n "$ac_tool_prefix"; then
     # Extract the first word of "${ac_tool_prefix}cc", so it can be a program name with args.
 set dummy ${ac_tool_prefix}cc; ac_word=$2
-{ $as_echo "$as_me:$LINENO: checking for $ac_word" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_CC+set}" = set; then
+if test "${ac_cv_prog_CC+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$CC"; then
@@ -2323,24 +2635,24 @@ for as_dir in $PATH
 do
   IFS=$as_save_IFS
   test -z "$as_dir" && as_dir=.
-  for ac_exec_ext in '' $ac_executable_extensions; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
   if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
     ac_cv_prog_CC="${ac_tool_prefix}cc"
-    $as_echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
-done
+  done
 IFS=$as_save_IFS
 
 fi
 fi
 CC=$ac_cv_prog_CC
 if test -n "$CC"; then
-  { $as_echo "$as_me:$LINENO: result: $CC" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
 $as_echo "$CC" >&6; }
 else
-  { $as_echo "$as_me:$LINENO: result: no" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi
 
@@ -2350,9 +2662,9 @@ fi
 if test -z "$CC"; then
   # Extract the first word of "cc", so it can be a program name with args.
 set dummy cc; ac_word=$2
-{ $as_echo "$as_me:$LINENO: checking for $ac_word" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_CC+set}" = set; then
+if test "${ac_cv_prog_CC+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$CC"; then
@@ -2364,18 +2676,18 @@ for as_dir in $PATH
 do
   IFS=$as_save_IFS
   test -z "$as_dir" && as_dir=.
-  for ac_exec_ext in '' $ac_executable_extensions; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
   if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
     if test "$as_dir/$ac_word$ac_exec_ext" = "/usr/ucb/cc"; then
        ac_prog_rejected=yes
        continue
      fi
     ac_cv_prog_CC="cc"
-    $as_echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
-done
+  done
 IFS=$as_save_IFS
 
 if test $ac_prog_rejected = yes; then
@@ -2394,10 +2706,10 @@ fi
 fi
 CC=$ac_cv_prog_CC
 if test -n "$CC"; then
-  { $as_echo "$as_me:$LINENO: result: $CC" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
 $as_echo "$CC" >&6; }
 else
-  { $as_echo "$as_me:$LINENO: result: no" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi
 
@@ -2409,9 +2721,9 @@ if test -z "$CC"; then
   do
     # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args.
 set dummy $ac_tool_prefix$ac_prog; ac_word=$2
-{ $as_echo "$as_me:$LINENO: checking for $ac_word" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_CC+set}" = set; then
+if test "${ac_cv_prog_CC+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$CC"; then
@@ -2422,24 +2734,24 @@ for as_dir in $PATH
 do
   IFS=$as_save_IFS
   test -z "$as_dir" && as_dir=.
-  for ac_exec_ext in '' $ac_executable_extensions; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
   if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
     ac_cv_prog_CC="$ac_tool_prefix$ac_prog"
-    $as_echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
-done
+  done
 IFS=$as_save_IFS
 
 fi
 fi
 CC=$ac_cv_prog_CC
 if test -n "$CC"; then
-  { $as_echo "$as_me:$LINENO: result: $CC" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
 $as_echo "$CC" >&6; }
 else
-  { $as_echo "$as_me:$LINENO: result: no" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi
 
@@ -2453,9 +2765,9 @@ if test -z "$CC"; then
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
-{ $as_echo "$as_me:$LINENO: checking for $ac_word" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_ac_ct_CC+set}" = set; then
+if test "${ac_cv_prog_ac_ct_CC+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$ac_ct_CC"; then
@@ -2466,24 +2778,24 @@ for as_dir in $PATH
 do
   IFS=$as_save_IFS
   test -z "$as_dir" && as_dir=.
-  for ac_exec_ext in '' $ac_executable_extensions; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
   if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
     ac_cv_prog_ac_ct_CC="$ac_prog"
-    $as_echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
-done
+  done
 IFS=$as_save_IFS
 
 fi
 fi
 ac_ct_CC=$ac_cv_prog_ac_ct_CC
 if test -n "$ac_ct_CC"; then
-  { $as_echo "$as_me:$LINENO: result: $ac_ct_CC" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CC" >&5
 $as_echo "$ac_ct_CC" >&6; }
 else
-  { $as_echo "$as_me:$LINENO: result: no" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi
 
@@ -2496,12 +2808,8 @@ done
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ $as_echo "$as_me:$LINENO: WARNING: In the future, Autoconf will not detect cross-tools
-whose name does not start with the host triplet.  If you think this
-configuration is useful to you, please write to autoconf@gnu.org." >&5
-$as_echo "$as_me: WARNING: In the future, Autoconf will not detect cross-tools
-whose name does not start with the host triplet.  If you think this
-configuration is useful to you, please write to autoconf@gnu.org." >&2;}
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     CC=$ac_ct_CC
@@ -2511,55 +2819,37 @@ fi
 fi
 
 
-test -z "$CC" && { { $as_echo "$as_me:$LINENO: error: no acceptable C compiler found in \$PATH
-See \`config.log' for more details." >&5
-$as_echo "$as_me: error: no acceptable C compiler found in \$PATH
-See \`config.log' for more details." >&2;}
-   { (exit 1); exit 1; }; }
+test -z "$CC" && { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "no acceptable C compiler found in \$PATH
+See \`config.log' for more details" "$LINENO" 5 ; }
 
 # Provide some information about the compiler.
-$as_echo "$as_me:$LINENO: checking for C compiler version" >&5
+$as_echo "$as_me:${as_lineno-$LINENO}: checking for C compiler version" >&5
 set X $ac_compile
 ac_compiler=$2
-{ (ac_try="$ac_compiler --version >&5"
+for ac_option in --version -v -V -qversion; do
+  { { ac_try="$ac_compiler $ac_option >&5"
 case "(($ac_try" in
   *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
   *) ac_try_echo=$ac_try;;
 esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_compiler --version >&5") 2>&5
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_compiler $ac_option >&5") 2>conftest.err
   ac_status=$?
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }
-{ (ac_try="$ac_compiler -v >&5"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_compiler -v >&5") 2>&5
-  ac_status=$?
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }
-{ (ac_try="$ac_compiler -V >&5"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_compiler -V >&5") 2>&5
-  ac_status=$?
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }
+  if test -s conftest.err; then
+    sed '10a\
+... rest of stderr output deleted ...
+         10q' conftest.err >conftest.er1
+    cat conftest.er1 >&5
+  fi
+  rm -f conftest.er1 conftest.err
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }
+done
 
-cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
@@ -2575,8 +2865,8 @@ ac_clean_files="$ac_clean_files a.out a.out.dSYM a.exe b.out"
 # Try to create an executable without -o first, disregard a.out.
 # It will help us diagnose broken compilers, and finding out an intuition
 # of exeext.
-{ $as_echo "$as_me:$LINENO: checking for C compiler default output file name" >&5
-$as_echo_n "checking for C compiler default output file name... " >&6; }
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the C compiler works" >&5
+$as_echo_n "checking whether the C compiler works... " >&6; }
 ac_link_default=`$as_echo "$ac_link" | sed 's/ -o *conftest[^ ]*//'`
 
 # The possible output files:
@@ -2592,17 +2882,17 @@ do
 done
 rm -f $ac_rmfiles
 
-if { (ac_try="$ac_link_default"
+if { { ac_try="$ac_link_default"
 case "(($ac_try" in
   *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
   *) ac_try_echo=$ac_try;;
 esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
   (eval "$ac_link_default") 2>&5
   ac_status=$?
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; then
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then :
   # Autoconf-2.13 could set the ac_cv_exeext variable to `no'.
 # So ignore a value of `no', otherwise this would lead to `EXEEXT = no'
 # in a Makefile.  We should not override ac_cv_exeext if it was cached,
@@ -2619,7 +2909,7 @@ do
 	# certainly right.
 	break;;
     *.* )
-        if test "${ac_cv_exeext+set}" = set && test "$ac_cv_exeext" != no;
+	if test "${ac_cv_exeext+set}" = set && test "$ac_cv_exeext" != no;
 	then :; else
 	   ac_cv_exeext=`expr "$ac_file" : '[^.]*\(\..*\)'`
 	fi
@@ -2638,80 +2928,41 @@ test "$ac_cv_exeext" = no && ac_cv_exeext=
 else
   ac_file=''
 fi
-
-{ $as_echo "$as_me:$LINENO: result: $ac_file" >&5
-$as_echo "$ac_file" >&6; }
-if test -z "$ac_file"; then
-  $as_echo "$as_me: failed program was:" >&5
+if test -z "$ac_file"; then :
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+$as_echo "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
 
-{ { $as_echo "$as_me:$LINENO: error: C compiler cannot create executables
-See \`config.log' for more details." >&5
-$as_echo "$as_me: error: C compiler cannot create executables
-See \`config.log' for more details." >&2;}
-   { (exit 77); exit 77; }; }
-fi
-
-ac_exeext=$ac_cv_exeext
-
-# Check that the compiler produces executables we can run.  If not, either
-# the compiler is broken, or we cross compile.
-{ $as_echo "$as_me:$LINENO: checking whether the C compiler works" >&5
-$as_echo_n "checking whether the C compiler works... " >&6; }
-# FIXME: These cross compiler hacks should be removed for Autoconf 3.0
-# If not cross compiling, check that we can run a simple program.
-if test "$cross_compiling" != yes; then
-  if { ac_try='./$ac_file'
-  { (case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_try") 2>&5
-  ac_status=$?
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-    cross_compiling=no
-  else
-    if test "$cross_compiling" = maybe; then
-	cross_compiling=yes
-    else
-	{ { $as_echo "$as_me:$LINENO: error: cannot run C compiled programs.
-If you meant to cross compile, use \`--host'.
-See \`config.log' for more details." >&5
-$as_echo "$as_me: error: cannot run C compiled programs.
-If you meant to cross compile, use \`--host'.
-See \`config.log' for more details." >&2;}
-   { (exit 1); exit 1; }; }
-    fi
-  fi
-fi
-{ $as_echo "$as_me:$LINENO: result: yes" >&5
+{ { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error 77 "C compiler cannot create executables
+See \`config.log' for more details" "$LINENO" 5 ; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 $as_echo "yes" >&6; }
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for C compiler default output file name" >&5
+$as_echo_n "checking for C compiler default output file name... " >&6; }
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_file" >&5
+$as_echo "$ac_file" >&6; }
+ac_exeext=$ac_cv_exeext
 
 rm -f -r a.out a.out.dSYM a.exe conftest$ac_cv_exeext b.out
 ac_clean_files=$ac_clean_files_save
-# Check that the compiler produces executables we can run.  If not, either
-# the compiler is broken, or we cross compile.
-{ $as_echo "$as_me:$LINENO: checking whether we are cross compiling" >&5
-$as_echo_n "checking whether we are cross compiling... " >&6; }
-{ $as_echo "$as_me:$LINENO: result: $cross_compiling" >&5
-$as_echo "$cross_compiling" >&6; }
-
-{ $as_echo "$as_me:$LINENO: checking for suffix of executables" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for suffix of executables" >&5
 $as_echo_n "checking for suffix of executables... " >&6; }
-if { (ac_try="$ac_link"
+if { { ac_try="$ac_link"
 case "(($ac_try" in
   *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
   *) ac_try_echo=$ac_try;;
 esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
   (eval "$ac_link") 2>&5
   ac_status=$?
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; then
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then :
   # If both `conftest.exe' and `conftest' are `present' (well, observable)
 # catch `conftest.exe'.  For instance with Cygwin, `ls conftest' will
 # work properly (i.e., refer to `conftest.exe'), while it won't with
@@ -2726,30 +2977,83 @@ for ac_file in conftest.exe conftest conftest.*; do
   esac
 done
 else
-  { { $as_echo "$as_me:$LINENO: error: cannot compute suffix of executables: cannot compile and link
-See \`config.log' for more details." >&5
-$as_echo "$as_me: error: cannot compute suffix of executables: cannot compile and link
-See \`config.log' for more details." >&2;}
-   { (exit 1); exit 1; }; }
+  { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "cannot compute suffix of executables: cannot compile and link
+See \`config.log' for more details" "$LINENO" 5 ; }
 fi
-
-rm -f conftest$ac_cv_exeext
-{ $as_echo "$as_me:$LINENO: result: $ac_cv_exeext" >&5
+rm -f conftest conftest$ac_cv_exeext
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_exeext" >&5
 $as_echo "$ac_cv_exeext" >&6; }
 
 rm -f conftest.$ac_ext
 EXEEXT=$ac_cv_exeext
 ac_exeext=$EXEEXT
-{ $as_echo "$as_me:$LINENO: checking for suffix of object files" >&5
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stdio.h>
+int
+main ()
+{
+FILE *f = fopen ("conftest.out", "w");
+ return ferror (f) || fclose (f) != 0;
+
+  ;
+  return 0;
+}
+_ACEOF
+ac_clean_files="$ac_clean_files conftest.out"
+# Check that the compiler produces executables we can run.  If not, either
+# the compiler is broken, or we cross compile.
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether we are cross compiling" >&5
+$as_echo_n "checking whether we are cross compiling... " >&6; }
+if test "$cross_compiling" != yes; then
+  { { ac_try="$ac_link"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_link") 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }
+  if { ac_try='./conftest$ac_cv_exeext'
+  { { case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_try") 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; }; then
+    cross_compiling=no
+  else
+    if test "$cross_compiling" = maybe; then
+	cross_compiling=yes
+    else
+	{ { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "cannot run C compiled programs.
+If you meant to cross compile, use \`--host'.
+See \`config.log' for more details" "$LINENO" 5 ; }
+    fi
+  fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $cross_compiling" >&5
+$as_echo "$cross_compiling" >&6; }
+
+rm -f conftest.$ac_ext conftest$ac_cv_exeext conftest.out
+ac_clean_files=$ac_clean_files_save
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for suffix of object files" >&5
 $as_echo_n "checking for suffix of object files... " >&6; }
-if test "${ac_cv_objext+set}" = set; then
+if test "${ac_cv_objext+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
-  cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
@@ -2761,17 +3065,17 @@ main ()
 }
 _ACEOF
 rm -f conftest.o conftest.obj
-if { (ac_try="$ac_compile"
+if { { ac_try="$ac_compile"
 case "(($ac_try" in
   *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
   *) ac_try_echo=$ac_try;;
 esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
   (eval "$ac_compile") 2>&5
   ac_status=$?
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; then
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then :
   for ac_file in conftest.o conftest.obj conftest.*; do
   test -f "$ac_file" || continue;
   case $ac_file in
@@ -2784,29 +3088,23 @@ else
   $as_echo "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
 
-{ { $as_echo "$as_me:$LINENO: error: cannot compute suffix of object files: cannot compile
-See \`config.log' for more details." >&5
-$as_echo "$as_me: error: cannot compute suffix of object files: cannot compile
-See \`config.log' for more details." >&2;}
-   { (exit 1); exit 1; }; }
+{ { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "cannot compute suffix of object files: cannot compile
+See \`config.log' for more details" "$LINENO" 5 ; }
 fi
-
 rm -f conftest.$ac_cv_objext conftest.$ac_ext
 fi
-{ $as_echo "$as_me:$LINENO: result: $ac_cv_objext" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_objext" >&5
 $as_echo "$ac_cv_objext" >&6; }
 OBJEXT=$ac_cv_objext
 ac_objext=$OBJEXT
-{ $as_echo "$as_me:$LINENO: checking whether we are using the GNU C compiler" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether we are using the GNU C compiler" >&5
 $as_echo_n "checking whether we are using the GNU C compiler... " >&6; }
-if test "${ac_cv_c_compiler_gnu+set}" = set; then
+if test "${ac_cv_c_compiler_gnu+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
-  cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
@@ -2820,37 +3118,16 @@ main ()
   return 0;
 }
 _ACEOF
-rm -f conftest.$ac_objext
-if { (ac_try="$ac_compile"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_compile") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest.$ac_objext; then
+if ac_fn_c_try_compile "$LINENO"; then :
   ac_compiler_gnu=yes
 else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-	ac_compiler_gnu=no
+  ac_compiler_gnu=no
 fi
-
 rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
 ac_cv_c_compiler_gnu=$ac_compiler_gnu
 
 fi
-{ $as_echo "$as_me:$LINENO: result: $ac_cv_c_compiler_gnu" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_compiler_gnu" >&5
 $as_echo "$ac_cv_c_compiler_gnu" >&6; }
 if test $ac_compiler_gnu = yes; then
   GCC=yes
@@ -2859,20 +3136,16 @@ else
 fi
 ac_test_CFLAGS=${CFLAGS+set}
 ac_save_CFLAGS=$CFLAGS
-{ $as_echo "$as_me:$LINENO: checking whether $CC accepts -g" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CC accepts -g" >&5
 $as_echo_n "checking whether $CC accepts -g... " >&6; }
-if test "${ac_cv_prog_cc_g+set}" = set; then
+if test "${ac_cv_prog_cc_g+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_save_c_werror_flag=$ac_c_werror_flag
    ac_c_werror_flag=yes
    ac_cv_prog_cc_g=no
    CFLAGS="-g"
-   cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
+   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
@@ -2883,35 +3156,11 @@ main ()
   return 0;
 }
 _ACEOF
-rm -f conftest.$ac_objext
-if { (ac_try="$ac_compile"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_compile") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest.$ac_objext; then
+if ac_fn_c_try_compile "$LINENO"; then :
   ac_cv_prog_cc_g=yes
 else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-	CFLAGS=""
-      cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
+  CFLAGS=""
+      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
@@ -2922,36 +3171,12 @@ main ()
   return 0;
 }
 _ACEOF
-rm -f conftest.$ac_objext
-if { (ac_try="$ac_compile"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_compile") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest.$ac_objext; then
-  :
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
+if ac_fn_c_try_compile "$LINENO"; then :
 
-	ac_c_werror_flag=$ac_save_c_werror_flag
+else
+  ac_c_werror_flag=$ac_save_c_werror_flag
 	 CFLAGS="-g"
-	 cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
+	 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
@@ -2962,42 +3187,17 @@ main ()
   return 0;
 }
 _ACEOF
-rm -f conftest.$ac_objext
-if { (ac_try="$ac_compile"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_compile") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest.$ac_objext; then
+if ac_fn_c_try_compile "$LINENO"; then :
   ac_cv_prog_cc_g=yes
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-
 fi
-
 rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
 fi
-
 rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
 fi
-
 rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
    ac_c_werror_flag=$ac_save_c_werror_flag
 fi
-{ $as_echo "$as_me:$LINENO: result: $ac_cv_prog_cc_g" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_g" >&5
 $as_echo "$ac_cv_prog_cc_g" >&6; }
 if test "$ac_test_CFLAGS" = set; then
   CFLAGS=$ac_save_CFLAGS
@@ -3014,18 +3214,14 @@ else
     CFLAGS=
   fi
 fi
-{ $as_echo "$as_me:$LINENO: checking for $CC option to accept ISO C89" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $CC option to accept ISO C89" >&5
 $as_echo_n "checking for $CC option to accept ISO C89... " >&6; }
-if test "${ac_cv_prog_cc_c89+set}" = set; then
+if test "${ac_cv_prog_cc_c89+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_cv_prog_cc_c89=no
 ac_save_CC=$CC
-cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <stdarg.h>
 #include <stdio.h>
@@ -3082,32 +3278,9 @@ for ac_arg in '' -qlanglvl=extc89 -qlanglvl=ansi -std \
 	-Ae "-Aa -D_HPUX_SOURCE" "-Xc -D__EXTENSIONS__"
 do
   CC="$ac_save_CC $ac_arg"
-  rm -f conftest.$ac_objext
-if { (ac_try="$ac_compile"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_compile") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest.$ac_objext; then
+  if ac_fn_c_try_compile "$LINENO"; then :
   ac_cv_prog_cc_c89=$ac_arg
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-
 fi
-
 rm -f core conftest.err conftest.$ac_objext
   test "x$ac_cv_prog_cc_c89" != "xno" && break
 done
@@ -3118,17 +3291,19 @@ fi
 # AC_CACHE_VAL
 case "x$ac_cv_prog_cc_c89" in
   x)
-    { $as_echo "$as_me:$LINENO: result: none needed" >&5
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
 $as_echo "none needed" >&6; } ;;
   xno)
-    { $as_echo "$as_me:$LINENO: result: unsupported" >&5
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
 $as_echo "unsupported" >&6; } ;;
   *)
     CC="$CC $ac_cv_prog_cc_c89"
-    { $as_echo "$as_me:$LINENO: result: $ac_cv_prog_cc_c89" >&5
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c89" >&5
 $as_echo "$ac_cv_prog_cc_c89" >&6; } ;;
 esac
+if test "x$ac_cv_prog_cc_c89" != xno; then :
 
+fi
 
 ac_ext=c
 ac_cpp='$CPP $CPPFLAGS'
@@ -3136,9 +3311,9 @@ ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
 ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
 ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
-{ $as_echo "$as_me:$LINENO: checking for a sed that does not truncate output" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for a sed that does not truncate output" >&5
 $as_echo_n "checking for a sed that does not truncate output... " >&6; }
-if test "${ac_cv_path_SED+set}" = set; then
+if test "${ac_cv_path_SED+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
             ac_script=s/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa/bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb/
@@ -3146,7 +3321,7 @@ else
        ac_script="$ac_script$as_nl$ac_script"
      done
      echo "$ac_script" 2>/dev/null | sed 99q >conftest.sed
-     $as_unset ac_script || ac_script=
+     { ac_script=; unset ac_script;}
      if test -z "$SED"; then
   ac_path_SED_found=false
   # Loop through the user's path and test for each of PROGNAME-LIST
@@ -3155,7 +3330,7 @@ for as_dir in $PATH
 do
   IFS=$as_save_IFS
   test -z "$as_dir" && as_dir=.
-  for ac_prog in sed gsed; do
+    for ac_prog in sed gsed; do
     for ac_exec_ext in '' $ac_executable_extensions; do
       ac_path_SED="$as_dir/$ac_prog$ac_exec_ext"
       { test -f "$ac_path_SED" && $as_test_x "$ac_path_SED"; } || continue
@@ -3175,7 +3350,7 @@ case `"$ac_path_SED" --version 2>&1` in
     $as_echo '' >> "conftest.nl"
     "$ac_path_SED" -f conftest.sed < "conftest.nl" >"conftest.out" 2>/dev/null || break
     diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
-    ac_count=`expr $ac_count + 1`
+    as_fn_arith $ac_count + 1 && ac_count=$as_val
     if test $ac_count -gt ${ac_path_SED_max-0}; then
       # Best one so far, save it but keep looking for a better one
       ac_cv_path_SED="$ac_path_SED"
@@ -3190,19 +3365,17 @@ esac
       $ac_path_SED_found && break 3
     done
   done
-done
+  done
 IFS=$as_save_IFS
   if test -z "$ac_cv_path_SED"; then
-    { { $as_echo "$as_me:$LINENO: error: no acceptable sed could be found in \$PATH" >&5
-$as_echo "$as_me: error: no acceptable sed could be found in \$PATH" >&2;}
-   { (exit 1); exit 1; }; }
+    as_fn_error $? "no acceptable sed could be found in \$PATH" "$LINENO" 5
   fi
 else
   ac_cv_path_SED=$SED
 fi
 
 fi
-{ $as_echo "$as_me:$LINENO: result: $ac_cv_path_SED" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_SED" >&5
 $as_echo "$ac_cv_path_SED" >&6; }
  SED="$ac_cv_path_SED"
   rm -f conftest.sed
@@ -3220,9 +3393,9 @@ Xsed="$SED -e 1s/^X//"
 
 
 
-{ $as_echo "$as_me:$LINENO: checking for grep that handles long lines and -e" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for grep that handles long lines and -e" >&5
 $as_echo_n "checking for grep that handles long lines and -e... " >&6; }
-if test "${ac_cv_path_GREP+set}" = set; then
+if test "${ac_cv_path_GREP+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -z "$GREP"; then
@@ -3233,7 +3406,7 @@ for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
 do
   IFS=$as_save_IFS
   test -z "$as_dir" && as_dir=.
-  for ac_prog in grep ggrep; do
+    for ac_prog in grep ggrep; do
     for ac_exec_ext in '' $ac_executable_extensions; do
       ac_path_GREP="$as_dir/$ac_prog$ac_exec_ext"
       { test -f "$ac_path_GREP" && $as_test_x "$ac_path_GREP"; } || continue
@@ -3253,7 +3426,7 @@ case `"$ac_path_GREP" --version 2>&1` in
     $as_echo 'GREP' >> "conftest.nl"
     "$ac_path_GREP" -e 'GREP$' -e '-(cannot match)-' < "conftest.nl" >"conftest.out" 2>/dev/null || break
     diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
-    ac_count=`expr $ac_count + 1`
+    as_fn_arith $ac_count + 1 && ac_count=$as_val
     if test $ac_count -gt ${ac_path_GREP_max-0}; then
       # Best one so far, save it but keep looking for a better one
       ac_cv_path_GREP="$ac_path_GREP"
@@ -3268,26 +3441,24 @@ esac
       $ac_path_GREP_found && break 3
     done
   done
-done
+  done
 IFS=$as_save_IFS
   if test -z "$ac_cv_path_GREP"; then
-    { { $as_echo "$as_me:$LINENO: error: no acceptable grep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" >&5
-$as_echo "$as_me: error: no acceptable grep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" >&2;}
-   { (exit 1); exit 1; }; }
+    as_fn_error $? "no acceptable grep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
   fi
 else
   ac_cv_path_GREP=$GREP
 fi
 
 fi
-{ $as_echo "$as_me:$LINENO: result: $ac_cv_path_GREP" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_GREP" >&5
 $as_echo "$ac_cv_path_GREP" >&6; }
  GREP="$ac_cv_path_GREP"
 
 
-{ $as_echo "$as_me:$LINENO: checking for egrep" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for egrep" >&5
 $as_echo_n "checking for egrep... " >&6; }
-if test "${ac_cv_path_EGREP+set}" = set; then
+if test "${ac_cv_path_EGREP+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if echo a | $GREP -E '(a|b)' >/dev/null 2>&1
@@ -3301,7 +3472,7 @@ for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
 do
   IFS=$as_save_IFS
   test -z "$as_dir" && as_dir=.
-  for ac_prog in egrep; do
+    for ac_prog in egrep; do
     for ac_exec_ext in '' $ac_executable_extensions; do
       ac_path_EGREP="$as_dir/$ac_prog$ac_exec_ext"
       { test -f "$ac_path_EGREP" && $as_test_x "$ac_path_EGREP"; } || continue
@@ -3321,7 +3492,7 @@ case `"$ac_path_EGREP" --version 2>&1` in
     $as_echo 'EGREP' >> "conftest.nl"
     "$ac_path_EGREP" 'EGREP$' < "conftest.nl" >"conftest.out" 2>/dev/null || break
     diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
-    ac_count=`expr $ac_count + 1`
+    as_fn_arith $ac_count + 1 && ac_count=$as_val
     if test $ac_count -gt ${ac_path_EGREP_max-0}; then
       # Best one so far, save it but keep looking for a better one
       ac_cv_path_EGREP="$ac_path_EGREP"
@@ -3336,12 +3507,10 @@ esac
       $ac_path_EGREP_found && break 3
     done
   done
-done
+  done
 IFS=$as_save_IFS
   if test -z "$ac_cv_path_EGREP"; then
-    { { $as_echo "$as_me:$LINENO: error: no acceptable egrep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" >&5
-$as_echo "$as_me: error: no acceptable egrep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" >&2;}
-   { (exit 1); exit 1; }; }
+    as_fn_error $? "no acceptable egrep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
   fi
 else
   ac_cv_path_EGREP=$EGREP
@@ -3349,14 +3518,14 @@ fi
 
    fi
 fi
-{ $as_echo "$as_me:$LINENO: result: $ac_cv_path_EGREP" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_EGREP" >&5
 $as_echo "$ac_cv_path_EGREP" >&6; }
  EGREP="$ac_cv_path_EGREP"
 
 
-{ $as_echo "$as_me:$LINENO: checking for fgrep" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for fgrep" >&5
 $as_echo_n "checking for fgrep... " >&6; }
-if test "${ac_cv_path_FGREP+set}" = set; then
+if test "${ac_cv_path_FGREP+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if echo 'ab*c' | $GREP -F 'ab*c' >/dev/null 2>&1
@@ -3370,7 +3539,7 @@ for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
 do
   IFS=$as_save_IFS
   test -z "$as_dir" && as_dir=.
-  for ac_prog in fgrep; do
+    for ac_prog in fgrep; do
     for ac_exec_ext in '' $ac_executable_extensions; do
       ac_path_FGREP="$as_dir/$ac_prog$ac_exec_ext"
       { test -f "$ac_path_FGREP" && $as_test_x "$ac_path_FGREP"; } || continue
@@ -3390,7 +3559,7 @@ case `"$ac_path_FGREP" --version 2>&1` in
     $as_echo 'FGREP' >> "conftest.nl"
     "$ac_path_FGREP" FGREP < "conftest.nl" >"conftest.out" 2>/dev/null || break
     diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
-    ac_count=`expr $ac_count + 1`
+    as_fn_arith $ac_count + 1 && ac_count=$as_val
     if test $ac_count -gt ${ac_path_FGREP_max-0}; then
       # Best one so far, save it but keep looking for a better one
       ac_cv_path_FGREP="$ac_path_FGREP"
@@ -3405,12 +3574,10 @@ esac
       $ac_path_FGREP_found && break 3
     done
   done
-done
+  done
 IFS=$as_save_IFS
   if test -z "$ac_cv_path_FGREP"; then
-    { { $as_echo "$as_me:$LINENO: error: no acceptable fgrep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" >&5
-$as_echo "$as_me: error: no acceptable fgrep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" >&2;}
-   { (exit 1); exit 1; }; }
+    as_fn_error $? "no acceptable fgrep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
   fi
 else
   ac_cv_path_FGREP=$FGREP
@@ -3418,7 +3585,7 @@ fi
 
    fi
 fi
-{ $as_echo "$as_me:$LINENO: result: $ac_cv_path_FGREP" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_FGREP" >&5
 $as_echo "$ac_cv_path_FGREP" >&6; }
  FGREP="$ac_cv_path_FGREP"
 
@@ -3444,7 +3611,7 @@ test -z "$GREP" && GREP=grep
 
 
 # Check whether --with-gnu-ld was given.
-if test "${with_gnu_ld+set}" = set; then
+if test "${with_gnu_ld+set}" = set; then :
   withval=$with_gnu_ld; test "$withval" = no || with_gnu_ld=yes
 else
   with_gnu_ld=no
@@ -3453,7 +3620,7 @@ fi
 ac_prog=ld
 if test "$GCC" = yes; then
   # Check if gcc -print-prog-name=ld gives a path.
-  { $as_echo "$as_me:$LINENO: checking for ld used by $CC" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ld used by $CC" >&5
 $as_echo_n "checking for ld used by $CC... " >&6; }
   case $host in
   *-*-mingw*)
@@ -3483,13 +3650,13 @@ $as_echo_n "checking for ld used by $CC... " >&6; }
     ;;
   esac
 elif test "$with_gnu_ld" = yes; then
-  { $as_echo "$as_me:$LINENO: checking for GNU ld" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for GNU ld" >&5
 $as_echo_n "checking for GNU ld... " >&6; }
 else
-  { $as_echo "$as_me:$LINENO: checking for non-GNU ld" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for non-GNU ld" >&5
 $as_echo_n "checking for non-GNU ld... " >&6; }
 fi
-if test "${lt_cv_path_LD+set}" = set; then
+if test "${lt_cv_path_LD+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -z "$LD"; then
@@ -3520,18 +3687,16 @@ fi
 
 LD="$lt_cv_path_LD"
 if test -n "$LD"; then
-  { $as_echo "$as_me:$LINENO: result: $LD" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $LD" >&5
 $as_echo "$LD" >&6; }
 else
-  { $as_echo "$as_me:$LINENO: result: no" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi
-test -z "$LD" && { { $as_echo "$as_me:$LINENO: error: no acceptable ld found in \$PATH" >&5
-$as_echo "$as_me: error: no acceptable ld found in \$PATH" >&2;}
-   { (exit 1); exit 1; }; }
-{ $as_echo "$as_me:$LINENO: checking if the linker ($LD) is GNU ld" >&5
+test -z "$LD" && as_fn_error $? "no acceptable ld found in \$PATH" "$LINENO" 5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if the linker ($LD) is GNU ld" >&5
 $as_echo_n "checking if the linker ($LD) is GNU ld... " >&6; }
-if test "${lt_cv_prog_gnu_ld+set}" = set; then
+if test "${lt_cv_prog_gnu_ld+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   # I'd rather use --version here, but apparently some GNU lds only accept -v.
@@ -3544,7 +3709,7 @@ case `$LD -v 2>&1 </dev/null` in
   ;;
 esac
 fi
-{ $as_echo "$as_me:$LINENO: result: $lt_cv_prog_gnu_ld" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_gnu_ld" >&5
 $as_echo "$lt_cv_prog_gnu_ld" >&6; }
 with_gnu_ld=$lt_cv_prog_gnu_ld
 
@@ -3556,9 +3721,9 @@ with_gnu_ld=$lt_cv_prog_gnu_ld
 
 
 
-{ $as_echo "$as_me:$LINENO: checking for BSD- or MS-compatible name lister (nm)" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for BSD- or MS-compatible name lister (nm)" >&5
 $as_echo_n "checking for BSD- or MS-compatible name lister (nm)... " >&6; }
-if test "${lt_cv_path_NM+set}" = set; then
+if test "${lt_cv_path_NM+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$NM"; then
@@ -3605,7 +3770,7 @@ else
   : ${lt_cv_path_NM=no}
 fi
 fi
-{ $as_echo "$as_me:$LINENO: result: $lt_cv_path_NM" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_path_NM" >&5
 $as_echo "$lt_cv_path_NM" >&6; }
 if test "$lt_cv_path_NM" != "no"; then
   NM="$lt_cv_path_NM"
@@ -3616,9 +3781,9 @@ else
   do
     # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args.
 set dummy $ac_tool_prefix$ac_prog; ac_word=$2
-{ $as_echo "$as_me:$LINENO: checking for $ac_word" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_DUMPBIN+set}" = set; then
+if test "${ac_cv_prog_DUMPBIN+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$DUMPBIN"; then
@@ -3629,24 +3794,24 @@ for as_dir in $PATH
 do
   IFS=$as_save_IFS
   test -z "$as_dir" && as_dir=.
-  for ac_exec_ext in '' $ac_executable_extensions; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
   if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
     ac_cv_prog_DUMPBIN="$ac_tool_prefix$ac_prog"
-    $as_echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
-done
+  done
 IFS=$as_save_IFS
 
 fi
 fi
 DUMPBIN=$ac_cv_prog_DUMPBIN
 if test -n "$DUMPBIN"; then
-  { $as_echo "$as_me:$LINENO: result: $DUMPBIN" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $DUMPBIN" >&5
 $as_echo "$DUMPBIN" >&6; }
 else
-  { $as_echo "$as_me:$LINENO: result: no" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi
 
@@ -3660,9 +3825,9 @@ if test -z "$DUMPBIN"; then
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
-{ $as_echo "$as_me:$LINENO: checking for $ac_word" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_ac_ct_DUMPBIN+set}" = set; then
+if test "${ac_cv_prog_ac_ct_DUMPBIN+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$ac_ct_DUMPBIN"; then
@@ -3673,24 +3838,24 @@ for as_dir in $PATH
 do
   IFS=$as_save_IFS
   test -z "$as_dir" && as_dir=.
-  for ac_exec_ext in '' $ac_executable_extensions; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
   if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
     ac_cv_prog_ac_ct_DUMPBIN="$ac_prog"
-    $as_echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
-done
+  done
 IFS=$as_save_IFS
 
 fi
 fi
 ac_ct_DUMPBIN=$ac_cv_prog_ac_ct_DUMPBIN
 if test -n "$ac_ct_DUMPBIN"; then
-  { $as_echo "$as_me:$LINENO: result: $ac_ct_DUMPBIN" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_DUMPBIN" >&5
 $as_echo "$ac_ct_DUMPBIN" >&6; }
 else
-  { $as_echo "$as_me:$LINENO: result: no" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi
 
@@ -3703,12 +3868,8 @@ done
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ $as_echo "$as_me:$LINENO: WARNING: In the future, Autoconf will not detect cross-tools
-whose name does not start with the host triplet.  If you think this
-configuration is useful to you, please write to autoconf@gnu.org." >&5
-$as_echo "$as_me: WARNING: In the future, Autoconf will not detect cross-tools
-whose name does not start with the host triplet.  If you think this
-configuration is useful to you, please write to autoconf@gnu.org." >&2;}
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     DUMPBIN=$ac_ct_DUMPBIN
@@ -3727,44 +3888,44 @@ test -z "$NM" && NM=nm
 
 
 
-{ $as_echo "$as_me:$LINENO: checking the name lister ($NM) interface" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking the name lister ($NM) interface" >&5
 $as_echo_n "checking the name lister ($NM) interface... " >&6; }
-if test "${lt_cv_nm_interface+set}" = set; then
+if test "${lt_cv_nm_interface+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   lt_cv_nm_interface="BSD nm"
   echo "int some_variable = 0;" > conftest.$ac_ext
-  (eval echo "\"\$as_me:3737: $ac_compile\"" >&5)
+  (eval echo "\"\$as_me:3898: $ac_compile\"" >&5)
   (eval "$ac_compile" 2>conftest.err)
   cat conftest.err >&5
-  (eval echo "\"\$as_me:3740: $NM \\\"conftest.$ac_objext\\\"\"" >&5)
+  (eval echo "\"\$as_me:3901: $NM \\\"conftest.$ac_objext\\\"\"" >&5)
   (eval "$NM \"conftest.$ac_objext\"" 2>conftest.err > conftest.out)
   cat conftest.err >&5
-  (eval echo "\"\$as_me:3743: output\"" >&5)
+  (eval echo "\"\$as_me:3904: output\"" >&5)
   cat conftest.out >&5
   if $GREP 'External.*some_variable' conftest.out > /dev/null; then
     lt_cv_nm_interface="MS dumpbin"
   fi
   rm -f conftest*
 fi
-{ $as_echo "$as_me:$LINENO: result: $lt_cv_nm_interface" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_nm_interface" >&5
 $as_echo "$lt_cv_nm_interface" >&6; }
 
-{ $as_echo "$as_me:$LINENO: checking whether ln -s works" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether ln -s works" >&5
 $as_echo_n "checking whether ln -s works... " >&6; }
 LN_S=$as_ln_s
 if test "$LN_S" = "ln -s"; then
-  { $as_echo "$as_me:$LINENO: result: yes" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 $as_echo "yes" >&6; }
 else
-  { $as_echo "$as_me:$LINENO: result: no, using $LN_S" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no, using $LN_S" >&5
 $as_echo "no, using $LN_S" >&6; }
 fi
 
 # find the maximum length of command line arguments
-{ $as_echo "$as_me:$LINENO: checking the maximum length of command line arguments" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking the maximum length of command line arguments" >&5
 $as_echo_n "checking the maximum length of command line arguments... " >&6; }
-if test "${lt_cv_sys_max_cmd_len+set}" = set; then
+if test "${lt_cv_sys_max_cmd_len+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
     i=0
@@ -3882,10 +4043,10 @@ else
 fi
 
 if test -n $lt_cv_sys_max_cmd_len ; then
-  { $as_echo "$as_me:$LINENO: result: $lt_cv_sys_max_cmd_len" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_sys_max_cmd_len" >&5
 $as_echo "$lt_cv_sys_max_cmd_len" >&6; }
 else
-  { $as_echo "$as_me:$LINENO: result: none" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: none" >&5
 $as_echo "none" >&6; }
 fi
 max_cmd_len=$lt_cv_sys_max_cmd_len
@@ -3899,7 +4060,7 @@ max_cmd_len=$lt_cv_sys_max_cmd_len
 : ${MV="mv -f"}
 : ${RM="rm -f"}
 
-{ $as_echo "$as_me:$LINENO: checking whether the shell understands some XSI constructs" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the shell understands some XSI constructs" >&5
 $as_echo_n "checking whether the shell understands some XSI constructs... " >&6; }
 # Try some XSI features
 xsi_shell=no
@@ -3909,17 +4070,17 @@ xsi_shell=no
     && eval 'test $(( 1 + 1 )) -eq 2 \
     && test "${#_lt_dummy}" -eq 5' ) >/dev/null 2>&1 \
   && xsi_shell=yes
-{ $as_echo "$as_me:$LINENO: result: $xsi_shell" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $xsi_shell" >&5
 $as_echo "$xsi_shell" >&6; }
 
 
-{ $as_echo "$as_me:$LINENO: checking whether the shell understands \"+=\"" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the shell understands \"+=\"" >&5
 $as_echo_n "checking whether the shell understands \"+=\"... " >&6; }
 lt_shell_append=no
 ( foo=bar; set foo baz; eval "$1+=\$2" && test "$foo" = barbaz ) \
     >/dev/null 2>&1 \
   && lt_shell_append=yes
-{ $as_echo "$as_me:$LINENO: result: $lt_shell_append" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_shell_append" >&5
 $as_echo "$lt_shell_append" >&6; }
 
 
@@ -3954,14 +4115,14 @@ esac
 
 
 
-{ $as_echo "$as_me:$LINENO: checking for $LD option to reload object files" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $LD option to reload object files" >&5
 $as_echo_n "checking for $LD option to reload object files... " >&6; }
-if test "${lt_cv_ld_reload_flag+set}" = set; then
+if test "${lt_cv_ld_reload_flag+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   lt_cv_ld_reload_flag='-r'
 fi
-{ $as_echo "$as_me:$LINENO: result: $lt_cv_ld_reload_flag" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_ld_reload_flag" >&5
 $as_echo "$lt_cv_ld_reload_flag" >&6; }
 reload_flag=$lt_cv_ld_reload_flag
 case $reload_flag in
@@ -3990,9 +4151,9 @@ esac
 if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}objdump", so it can be a program name with args.
 set dummy ${ac_tool_prefix}objdump; ac_word=$2
-{ $as_echo "$as_me:$LINENO: checking for $ac_word" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_OBJDUMP+set}" = set; then
+if test "${ac_cv_prog_OBJDUMP+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$OBJDUMP"; then
@@ -4003,24 +4164,24 @@ for as_dir in $PATH
 do
   IFS=$as_save_IFS
   test -z "$as_dir" && as_dir=.
-  for ac_exec_ext in '' $ac_executable_extensions; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
   if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
     ac_cv_prog_OBJDUMP="${ac_tool_prefix}objdump"
-    $as_echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
-done
+  done
 IFS=$as_save_IFS
 
 fi
 fi
 OBJDUMP=$ac_cv_prog_OBJDUMP
 if test -n "$OBJDUMP"; then
-  { $as_echo "$as_me:$LINENO: result: $OBJDUMP" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $OBJDUMP" >&5
 $as_echo "$OBJDUMP" >&6; }
 else
-  { $as_echo "$as_me:$LINENO: result: no" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi
 
@@ -4030,9 +4191,9 @@ if test -z "$ac_cv_prog_OBJDUMP"; then
   ac_ct_OBJDUMP=$OBJDUMP
   # Extract the first word of "objdump", so it can be a program name with args.
 set dummy objdump; ac_word=$2
-{ $as_echo "$as_me:$LINENO: checking for $ac_word" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_ac_ct_OBJDUMP+set}" = set; then
+if test "${ac_cv_prog_ac_ct_OBJDUMP+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$ac_ct_OBJDUMP"; then
@@ -4043,24 +4204,24 @@ for as_dir in $PATH
 do
   IFS=$as_save_IFS
   test -z "$as_dir" && as_dir=.
-  for ac_exec_ext in '' $ac_executable_extensions; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
   if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
     ac_cv_prog_ac_ct_OBJDUMP="objdump"
-    $as_echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
-done
+  done
 IFS=$as_save_IFS
 
 fi
 fi
 ac_ct_OBJDUMP=$ac_cv_prog_ac_ct_OBJDUMP
 if test -n "$ac_ct_OBJDUMP"; then
-  { $as_echo "$as_me:$LINENO: result: $ac_ct_OBJDUMP" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_OBJDUMP" >&5
 $as_echo "$ac_ct_OBJDUMP" >&6; }
 else
-  { $as_echo "$as_me:$LINENO: result: no" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi
 
@@ -4069,12 +4230,8 @@ fi
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ $as_echo "$as_me:$LINENO: WARNING: In the future, Autoconf will not detect cross-tools
-whose name does not start with the host triplet.  If you think this
-configuration is useful to you, please write to autoconf@gnu.org." >&5
-$as_echo "$as_me: WARNING: In the future, Autoconf will not detect cross-tools
-whose name does not start with the host triplet.  If you think this
-configuration is useful to you, please write to autoconf@gnu.org." >&2;}
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     OBJDUMP=$ac_ct_OBJDUMP
@@ -4093,9 +4250,9 @@ test -z "$OBJDUMP" && OBJDUMP=objdump
 
 
 
-{ $as_echo "$as_me:$LINENO: checking how to recognize dependent libraries" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking how to recognize dependent libraries" >&5
 $as_echo_n "checking how to recognize dependent libraries... " >&6; }
-if test "${lt_cv_deplibs_check_method+set}" = set; then
+if test "${lt_cv_deplibs_check_method+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   lt_cv_file_magic_cmd='$MAGIC_CMD'
@@ -4289,7 +4446,7 @@ tpf*)
 esac
 
 fi
-{ $as_echo "$as_me:$LINENO: result: $lt_cv_deplibs_check_method" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_deplibs_check_method" >&5
 $as_echo "$lt_cv_deplibs_check_method" >&6; }
 file_magic_cmd=$lt_cv_file_magic_cmd
 deplibs_check_method=$lt_cv_deplibs_check_method
@@ -4309,9 +4466,9 @@ test -z "$deplibs_check_method" && deplibs_check_method=unknown
 if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}ar", so it can be a program name with args.
 set dummy ${ac_tool_prefix}ar; ac_word=$2
-{ $as_echo "$as_me:$LINENO: checking for $ac_word" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_AR+set}" = set; then
+if test "${ac_cv_prog_AR+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$AR"; then
@@ -4322,24 +4479,24 @@ for as_dir in $PATH
 do
   IFS=$as_save_IFS
   test -z "$as_dir" && as_dir=.
-  for ac_exec_ext in '' $ac_executable_extensions; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
   if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
     ac_cv_prog_AR="${ac_tool_prefix}ar"
-    $as_echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
-done
+  done
 IFS=$as_save_IFS
 
 fi
 fi
 AR=$ac_cv_prog_AR
 if test -n "$AR"; then
-  { $as_echo "$as_me:$LINENO: result: $AR" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $AR" >&5
 $as_echo "$AR" >&6; }
 else
-  { $as_echo "$as_me:$LINENO: result: no" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi
 
@@ -4349,9 +4506,9 @@ if test -z "$ac_cv_prog_AR"; then
   ac_ct_AR=$AR
   # Extract the first word of "ar", so it can be a program name with args.
 set dummy ar; ac_word=$2
-{ $as_echo "$as_me:$LINENO: checking for $ac_word" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_ac_ct_AR+set}" = set; then
+if test "${ac_cv_prog_ac_ct_AR+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$ac_ct_AR"; then
@@ -4362,24 +4519,24 @@ for as_dir in $PATH
 do
   IFS=$as_save_IFS
   test -z "$as_dir" && as_dir=.
-  for ac_exec_ext in '' $ac_executable_extensions; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
   if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
     ac_cv_prog_ac_ct_AR="ar"
-    $as_echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
-done
+  done
 IFS=$as_save_IFS
 
 fi
 fi
 ac_ct_AR=$ac_cv_prog_ac_ct_AR
 if test -n "$ac_ct_AR"; then
-  { $as_echo "$as_me:$LINENO: result: $ac_ct_AR" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_AR" >&5
 $as_echo "$ac_ct_AR" >&6; }
 else
-  { $as_echo "$as_me:$LINENO: result: no" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi
 
@@ -4388,12 +4545,8 @@ fi
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ $as_echo "$as_me:$LINENO: WARNING: In the future, Autoconf will not detect cross-tools
-whose name does not start with the host triplet.  If you think this
-configuration is useful to you, please write to autoconf@gnu.org." >&5
-$as_echo "$as_me: WARNING: In the future, Autoconf will not detect cross-tools
-whose name does not start with the host triplet.  If you think this
-configuration is useful to you, please write to autoconf@gnu.org." >&2;}
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     AR=$ac_ct_AR
@@ -4418,9 +4571,9 @@ test -z "$AR_FLAGS" && AR_FLAGS=cru
 if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}strip", so it can be a program name with args.
 set dummy ${ac_tool_prefix}strip; ac_word=$2
-{ $as_echo "$as_me:$LINENO: checking for $ac_word" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_STRIP+set}" = set; then
+if test "${ac_cv_prog_STRIP+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$STRIP"; then
@@ -4431,24 +4584,24 @@ for as_dir in $PATH
 do
   IFS=$as_save_IFS
   test -z "$as_dir" && as_dir=.
-  for ac_exec_ext in '' $ac_executable_extensions; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
   if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
     ac_cv_prog_STRIP="${ac_tool_prefix}strip"
-    $as_echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
-done
+  done
 IFS=$as_save_IFS
 
 fi
 fi
 STRIP=$ac_cv_prog_STRIP
 if test -n "$STRIP"; then
-  { $as_echo "$as_me:$LINENO: result: $STRIP" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $STRIP" >&5
 $as_echo "$STRIP" >&6; }
 else
-  { $as_echo "$as_me:$LINENO: result: no" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi
 
@@ -4458,9 +4611,9 @@ if test -z "$ac_cv_prog_STRIP"; then
   ac_ct_STRIP=$STRIP
   # Extract the first word of "strip", so it can be a program name with args.
 set dummy strip; ac_word=$2
-{ $as_echo "$as_me:$LINENO: checking for $ac_word" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_ac_ct_STRIP+set}" = set; then
+if test "${ac_cv_prog_ac_ct_STRIP+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$ac_ct_STRIP"; then
@@ -4471,24 +4624,24 @@ for as_dir in $PATH
 do
   IFS=$as_save_IFS
   test -z "$as_dir" && as_dir=.
-  for ac_exec_ext in '' $ac_executable_extensions; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
   if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
     ac_cv_prog_ac_ct_STRIP="strip"
-    $as_echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
-done
+  done
 IFS=$as_save_IFS
 
 fi
 fi
 ac_ct_STRIP=$ac_cv_prog_ac_ct_STRIP
 if test -n "$ac_ct_STRIP"; then
-  { $as_echo "$as_me:$LINENO: result: $ac_ct_STRIP" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_STRIP" >&5
 $as_echo "$ac_ct_STRIP" >&6; }
 else
-  { $as_echo "$as_me:$LINENO: result: no" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi
 
@@ -4497,12 +4650,8 @@ fi
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ $as_echo "$as_me:$LINENO: WARNING: In the future, Autoconf will not detect cross-tools
-whose name does not start with the host triplet.  If you think this
-configuration is useful to you, please write to autoconf@gnu.org." >&5
-$as_echo "$as_me: WARNING: In the future, Autoconf will not detect cross-tools
-whose name does not start with the host triplet.  If you think this
-configuration is useful to you, please write to autoconf@gnu.org." >&2;}
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     STRIP=$ac_ct_STRIP
@@ -4521,9 +4670,9 @@ test -z "$STRIP" && STRIP=:
 if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}ranlib", so it can be a program name with args.
 set dummy ${ac_tool_prefix}ranlib; ac_word=$2
-{ $as_echo "$as_me:$LINENO: checking for $ac_word" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_RANLIB+set}" = set; then
+if test "${ac_cv_prog_RANLIB+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$RANLIB"; then
@@ -4534,24 +4683,24 @@ for as_dir in $PATH
 do
   IFS=$as_save_IFS
   test -z "$as_dir" && as_dir=.
-  for ac_exec_ext in '' $ac_executable_extensions; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
   if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
     ac_cv_prog_RANLIB="${ac_tool_prefix}ranlib"
-    $as_echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
-done
+  done
 IFS=$as_save_IFS
 
 fi
 fi
 RANLIB=$ac_cv_prog_RANLIB
 if test -n "$RANLIB"; then
-  { $as_echo "$as_me:$LINENO: result: $RANLIB" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $RANLIB" >&5
 $as_echo "$RANLIB" >&6; }
 else
-  { $as_echo "$as_me:$LINENO: result: no" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi
 
@@ -4561,9 +4710,9 @@ if test -z "$ac_cv_prog_RANLIB"; then
   ac_ct_RANLIB=$RANLIB
   # Extract the first word of "ranlib", so it can be a program name with args.
 set dummy ranlib; ac_word=$2
-{ $as_echo "$as_me:$LINENO: checking for $ac_word" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_ac_ct_RANLIB+set}" = set; then
+if test "${ac_cv_prog_ac_ct_RANLIB+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$ac_ct_RANLIB"; then
@@ -4574,24 +4723,24 @@ for as_dir in $PATH
 do
   IFS=$as_save_IFS
   test -z "$as_dir" && as_dir=.
-  for ac_exec_ext in '' $ac_executable_extensions; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
   if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
     ac_cv_prog_ac_ct_RANLIB="ranlib"
-    $as_echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
-done
+  done
 IFS=$as_save_IFS
 
 fi
 fi
 ac_ct_RANLIB=$ac_cv_prog_ac_ct_RANLIB
 if test -n "$ac_ct_RANLIB"; then
-  { $as_echo "$as_me:$LINENO: result: $ac_ct_RANLIB" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_RANLIB" >&5
 $as_echo "$ac_ct_RANLIB" >&6; }
 else
-  { $as_echo "$as_me:$LINENO: result: no" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi
 
@@ -4600,12 +4749,8 @@ fi
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ $as_echo "$as_me:$LINENO: WARNING: In the future, Autoconf will not detect cross-tools
-whose name does not start with the host triplet.  If you think this
-configuration is useful to you, please write to autoconf@gnu.org." >&5
-$as_echo "$as_me: WARNING: In the future, Autoconf will not detect cross-tools
-whose name does not start with the host triplet.  If you think this
-configuration is useful to you, please write to autoconf@gnu.org." >&2;}
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     RANLIB=$ac_ct_RANLIB
@@ -4682,9 +4827,9 @@ compiler=$CC
 
 
 # Check for command to grab the raw symbol name followed by C symbol from nm.
-{ $as_echo "$as_me:$LINENO: checking command to parse $NM output from $compiler object" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking command to parse $NM output from $compiler object" >&5
 $as_echo_n "checking command to parse $NM output from $compiler object... " >&6; }
-if test "${lt_cv_sys_global_symbol_pipe+set}" = set; then
+if test "${lt_cv_sys_global_symbol_pipe+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
 
@@ -4800,18 +4945,18 @@ void nm_test_func(void){}
 int main(){nm_test_var='a';nm_test_func();return(0);}
 _LT_EOF
 
-  if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
   (eval $ac_compile) 2>&5
   ac_status=$?
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; then
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then
     # Now try to grab the symbols.
     nlist=conftest.nm
-    if { (eval echo "$as_me:$LINENO: \"$NM conftest.$ac_objext \| $lt_cv_sys_global_symbol_pipe \> $nlist\"") >&5
+    if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$NM conftest.$ac_objext \| $lt_cv_sys_global_symbol_pipe \> $nlist\""; } >&5
   (eval $NM conftest.$ac_objext \| $lt_cv_sys_global_symbol_pipe \> $nlist) 2>&5
   ac_status=$?
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && test -s "$nlist"; then
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s "$nlist"; then
       # Try sorting and uniquifying the output.
       if sort "$nlist" | uniq > "$nlist"T; then
 	mv -f "$nlist"T "$nlist"
@@ -4864,11 +5009,11 @@ _LT_EOF
 	  lt_save_CFLAGS="$CFLAGS"
 	  LIBS="conftstm.$ac_objext"
 	  CFLAGS="$CFLAGS$lt_prog_compiler_no_builtin_flag"
-	  if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+	  if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
   (eval $ac_link) 2>&5
   ac_status=$?
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && test -s conftest${ac_exeext}; then
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s conftest${ac_exeext}; then
 	    pipe_works=yes
 	  fi
 	  LIBS="$lt_save_LIBS"
@@ -4902,10 +5047,10 @@ if test -z "$lt_cv_sys_global_symbol_pipe"; then
   lt_cv_sys_global_symbol_to_cdecl=
 fi
 if test -z "$lt_cv_sys_global_symbol_pipe$lt_cv_sys_global_symbol_to_cdecl"; then
-  { $as_echo "$as_me:$LINENO: result: failed" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: failed" >&5
 $as_echo "failed" >&6; }
 else
-  { $as_echo "$as_me:$LINENO: result: ok" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: ok" >&5
 $as_echo "ok" >&6; }
 fi
 
@@ -4932,7 +5077,7 @@ fi
 
 
 # Check whether --enable-libtool-lock was given.
-if test "${enable_libtool_lock+set}" = set; then
+if test "${enable_libtool_lock+set}" = set; then :
   enableval=$enable_libtool_lock;
 fi
 
@@ -4944,11 +5089,11 @@ case $host in
 ia64-*-hpux*)
   # Find out which ABI we are using.
   echo 'int i;' > conftest.$ac_ext
-  if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
   (eval $ac_compile) 2>&5
   ac_status=$?
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; then
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then
     case `/usr/bin/file conftest.$ac_objext` in
       *ELF-32*)
 	HPUX_IA64_MODE="32"
@@ -4962,12 +5107,12 @@ ia64-*-hpux*)
   ;;
 *-*-irix6*)
   # Find out which ABI we are using.
-  echo '#line 4965 "configure"' > conftest.$ac_ext
-  if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  echo '#line 5110 "configure"' > conftest.$ac_ext
+  if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
   (eval $ac_compile) 2>&5
   ac_status=$?
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; then
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then
     if test "$lt_cv_prog_gnu_ld" = yes; then
       case `/usr/bin/file conftest.$ac_objext` in
 	*32-bit*)
@@ -5001,11 +5146,11 @@ x86_64-*kfreebsd*-gnu|x86_64-*linux*|ppc*-*linux*|powerpc*-*linux*| \
 s390*-*linux*|s390*-*tpf*|sparc*-*linux*)
   # Find out which ABI we are using.
   echo 'int i;' > conftest.$ac_ext
-  if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
   (eval $ac_compile) 2>&5
   ac_status=$?
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; then
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then
     case `/usr/bin/file conftest.o` in
       *32-bit*)
 	case $host in
@@ -5054,9 +5199,9 @@ s390*-*linux*|s390*-*tpf*|sparc*-*linux*)
   # On SCO OpenServer 5, we need -belf to get full-featured binaries.
   SAVE_CFLAGS="$CFLAGS"
   CFLAGS="$CFLAGS -belf"
-  { $as_echo "$as_me:$LINENO: checking whether the C compiler needs -belf" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the C compiler needs -belf" >&5
 $as_echo_n "checking whether the C compiler needs -belf... " >&6; }
-if test "${lt_cv_cc_needs_belf+set}" = set; then
+if test "${lt_cv_cc_needs_belf+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_ext=c
@@ -5065,11 +5210,7 @@ ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
 ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
 ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
-     cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
+     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
@@ -5080,38 +5221,13 @@ main ()
   return 0;
 }
 _ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (ac_try="$ac_link"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_link") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest$ac_exeext && {
-	 test "$cross_compiling" = yes ||
-	 $as_test_x conftest$ac_exeext
-       }; then
+if ac_fn_c_try_link "$LINENO"; then :
   lt_cv_cc_needs_belf=yes
 else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-	lt_cv_cc_needs_belf=no
+  lt_cv_cc_needs_belf=no
 fi
-
-rm -rf conftest.dSYM
-rm -f core conftest.err conftest.$ac_objext conftest_ipa8_conftest.oo \
-      conftest$ac_exeext conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
      ac_ext=c
 ac_cpp='$CPP $CPPFLAGS'
 ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
@@ -5119,7 +5235,7 @@ ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $
 ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 fi
-{ $as_echo "$as_me:$LINENO: result: $lt_cv_cc_needs_belf" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_cc_needs_belf" >&5
 $as_echo "$lt_cv_cc_needs_belf" >&6; }
   if test x"$lt_cv_cc_needs_belf" != x"yes"; then
     # this is probably gcc 2.8.0, egcs 1.0 or newer; no need for -belf
@@ -5129,11 +5245,11 @@ $as_echo "$lt_cv_cc_needs_belf" >&6; }
 sparc*-*solaris*)
   # Find out which ABI we are using.
   echo 'int i;' > conftest.$ac_ext
-  if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
   (eval $ac_compile) 2>&5
   ac_status=$?
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; then
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then
     case `/usr/bin/file conftest.o` in
     *64-bit*)
       case $lt_cv_prog_gnu_ld in
@@ -5159,9 +5275,9 @@ need_locks="$enable_libtool_lock"
     if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}dsymutil", so it can be a program name with args.
 set dummy ${ac_tool_prefix}dsymutil; ac_word=$2
-{ $as_echo "$as_me:$LINENO: checking for $ac_word" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_DSYMUTIL+set}" = set; then
+if test "${ac_cv_prog_DSYMUTIL+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$DSYMUTIL"; then
@@ -5172,24 +5288,24 @@ for as_dir in $PATH
 do
   IFS=$as_save_IFS
   test -z "$as_dir" && as_dir=.
-  for ac_exec_ext in '' $ac_executable_extensions; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
   if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
     ac_cv_prog_DSYMUTIL="${ac_tool_prefix}dsymutil"
-    $as_echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
-done
+  done
 IFS=$as_save_IFS
 
 fi
 fi
 DSYMUTIL=$ac_cv_prog_DSYMUTIL
 if test -n "$DSYMUTIL"; then
-  { $as_echo "$as_me:$LINENO: result: $DSYMUTIL" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $DSYMUTIL" >&5
 $as_echo "$DSYMUTIL" >&6; }
 else
-  { $as_echo "$as_me:$LINENO: result: no" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi
 
@@ -5199,9 +5315,9 @@ if test -z "$ac_cv_prog_DSYMUTIL"; then
   ac_ct_DSYMUTIL=$DSYMUTIL
   # Extract the first word of "dsymutil", so it can be a program name with args.
 set dummy dsymutil; ac_word=$2
-{ $as_echo "$as_me:$LINENO: checking for $ac_word" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_ac_ct_DSYMUTIL+set}" = set; then
+if test "${ac_cv_prog_ac_ct_DSYMUTIL+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$ac_ct_DSYMUTIL"; then
@@ -5212,24 +5328,24 @@ for as_dir in $PATH
 do
   IFS=$as_save_IFS
   test -z "$as_dir" && as_dir=.
-  for ac_exec_ext in '' $ac_executable_extensions; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
   if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
     ac_cv_prog_ac_ct_DSYMUTIL="dsymutil"
-    $as_echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
-done
+  done
 IFS=$as_save_IFS
 
 fi
 fi
 ac_ct_DSYMUTIL=$ac_cv_prog_ac_ct_DSYMUTIL
 if test -n "$ac_ct_DSYMUTIL"; then
-  { $as_echo "$as_me:$LINENO: result: $ac_ct_DSYMUTIL" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_DSYMUTIL" >&5
 $as_echo "$ac_ct_DSYMUTIL" >&6; }
 else
-  { $as_echo "$as_me:$LINENO: result: no" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi
 
@@ -5238,12 +5354,8 @@ fi
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ $as_echo "$as_me:$LINENO: WARNING: In the future, Autoconf will not detect cross-tools
-whose name does not start with the host triplet.  If you think this
-configuration is useful to you, please write to autoconf@gnu.org." >&5
-$as_echo "$as_me: WARNING: In the future, Autoconf will not detect cross-tools
-whose name does not start with the host triplet.  If you think this
-configuration is useful to you, please write to autoconf@gnu.org." >&2;}
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     DSYMUTIL=$ac_ct_DSYMUTIL
@@ -5255,9 +5367,9 @@ fi
     if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}nmedit", so it can be a program name with args.
 set dummy ${ac_tool_prefix}nmedit; ac_word=$2
-{ $as_echo "$as_me:$LINENO: checking for $ac_word" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_NMEDIT+set}" = set; then
+if test "${ac_cv_prog_NMEDIT+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$NMEDIT"; then
@@ -5268,24 +5380,24 @@ for as_dir in $PATH
 do
   IFS=$as_save_IFS
   test -z "$as_dir" && as_dir=.
-  for ac_exec_ext in '' $ac_executable_extensions; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
   if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
     ac_cv_prog_NMEDIT="${ac_tool_prefix}nmedit"
-    $as_echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
-done
+  done
 IFS=$as_save_IFS
 
 fi
 fi
 NMEDIT=$ac_cv_prog_NMEDIT
 if test -n "$NMEDIT"; then
-  { $as_echo "$as_me:$LINENO: result: $NMEDIT" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $NMEDIT" >&5
 $as_echo "$NMEDIT" >&6; }
 else
-  { $as_echo "$as_me:$LINENO: result: no" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi
 
@@ -5295,9 +5407,9 @@ if test -z "$ac_cv_prog_NMEDIT"; then
   ac_ct_NMEDIT=$NMEDIT
   # Extract the first word of "nmedit", so it can be a program name with args.
 set dummy nmedit; ac_word=$2
-{ $as_echo "$as_me:$LINENO: checking for $ac_word" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_ac_ct_NMEDIT+set}" = set; then
+if test "${ac_cv_prog_ac_ct_NMEDIT+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$ac_ct_NMEDIT"; then
@@ -5308,24 +5420,24 @@ for as_dir in $PATH
 do
   IFS=$as_save_IFS
   test -z "$as_dir" && as_dir=.
-  for ac_exec_ext in '' $ac_executable_extensions; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
   if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
     ac_cv_prog_ac_ct_NMEDIT="nmedit"
-    $as_echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
-done
+  done
 IFS=$as_save_IFS
 
 fi
 fi
 ac_ct_NMEDIT=$ac_cv_prog_ac_ct_NMEDIT
 if test -n "$ac_ct_NMEDIT"; then
-  { $as_echo "$as_me:$LINENO: result: $ac_ct_NMEDIT" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_NMEDIT" >&5
 $as_echo "$ac_ct_NMEDIT" >&6; }
 else
-  { $as_echo "$as_me:$LINENO: result: no" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi
 
@@ -5334,12 +5446,8 @@ fi
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ $as_echo "$as_me:$LINENO: WARNING: In the future, Autoconf will not detect cross-tools
-whose name does not start with the host triplet.  If you think this
-configuration is useful to you, please write to autoconf@gnu.org." >&5
-$as_echo "$as_me: WARNING: In the future, Autoconf will not detect cross-tools
-whose name does not start with the host triplet.  If you think this
-configuration is useful to you, please write to autoconf@gnu.org." >&2;}
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     NMEDIT=$ac_ct_NMEDIT
@@ -5351,9 +5459,9 @@ fi
     if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}lipo", so it can be a program name with args.
 set dummy ${ac_tool_prefix}lipo; ac_word=$2
-{ $as_echo "$as_me:$LINENO: checking for $ac_word" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_LIPO+set}" = set; then
+if test "${ac_cv_prog_LIPO+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$LIPO"; then
@@ -5364,24 +5472,24 @@ for as_dir in $PATH
 do
   IFS=$as_save_IFS
   test -z "$as_dir" && as_dir=.
-  for ac_exec_ext in '' $ac_executable_extensions; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
   if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
     ac_cv_prog_LIPO="${ac_tool_prefix}lipo"
-    $as_echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
-done
+  done
 IFS=$as_save_IFS
 
 fi
 fi
 LIPO=$ac_cv_prog_LIPO
 if test -n "$LIPO"; then
-  { $as_echo "$as_me:$LINENO: result: $LIPO" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $LIPO" >&5
 $as_echo "$LIPO" >&6; }
 else
-  { $as_echo "$as_me:$LINENO: result: no" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi
 
@@ -5391,9 +5499,9 @@ if test -z "$ac_cv_prog_LIPO"; then
   ac_ct_LIPO=$LIPO
   # Extract the first word of "lipo", so it can be a program name with args.
 set dummy lipo; ac_word=$2
-{ $as_echo "$as_me:$LINENO: checking for $ac_word" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_ac_ct_LIPO+set}" = set; then
+if test "${ac_cv_prog_ac_ct_LIPO+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$ac_ct_LIPO"; then
@@ -5404,24 +5512,24 @@ for as_dir in $PATH
 do
   IFS=$as_save_IFS
   test -z "$as_dir" && as_dir=.
-  for ac_exec_ext in '' $ac_executable_extensions; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
   if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
     ac_cv_prog_ac_ct_LIPO="lipo"
-    $as_echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
-done
+  done
 IFS=$as_save_IFS
 
 fi
 fi
 ac_ct_LIPO=$ac_cv_prog_ac_ct_LIPO
 if test -n "$ac_ct_LIPO"; then
-  { $as_echo "$as_me:$LINENO: result: $ac_ct_LIPO" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_LIPO" >&5
 $as_echo "$ac_ct_LIPO" >&6; }
 else
-  { $as_echo "$as_me:$LINENO: result: no" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi
 
@@ -5430,12 +5538,8 @@ fi
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ $as_echo "$as_me:$LINENO: WARNING: In the future, Autoconf will not detect cross-tools
-whose name does not start with the host triplet.  If you think this
-configuration is useful to you, please write to autoconf@gnu.org." >&5
-$as_echo "$as_me: WARNING: In the future, Autoconf will not detect cross-tools
-whose name does not start with the host triplet.  If you think this
-configuration is useful to you, please write to autoconf@gnu.org." >&2;}
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     LIPO=$ac_ct_LIPO
@@ -5447,9 +5551,9 @@ fi
     if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}otool", so it can be a program name with args.
 set dummy ${ac_tool_prefix}otool; ac_word=$2
-{ $as_echo "$as_me:$LINENO: checking for $ac_word" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_OTOOL+set}" = set; then
+if test "${ac_cv_prog_OTOOL+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$OTOOL"; then
@@ -5460,24 +5564,24 @@ for as_dir in $PATH
 do
   IFS=$as_save_IFS
   test -z "$as_dir" && as_dir=.
-  for ac_exec_ext in '' $ac_executable_extensions; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
   if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
     ac_cv_prog_OTOOL="${ac_tool_prefix}otool"
-    $as_echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
-done
+  done
 IFS=$as_save_IFS
 
 fi
 fi
 OTOOL=$ac_cv_prog_OTOOL
 if test -n "$OTOOL"; then
-  { $as_echo "$as_me:$LINENO: result: $OTOOL" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $OTOOL" >&5
 $as_echo "$OTOOL" >&6; }
 else
-  { $as_echo "$as_me:$LINENO: result: no" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi
 
@@ -5487,9 +5591,9 @@ if test -z "$ac_cv_prog_OTOOL"; then
   ac_ct_OTOOL=$OTOOL
   # Extract the first word of "otool", so it can be a program name with args.
 set dummy otool; ac_word=$2
-{ $as_echo "$as_me:$LINENO: checking for $ac_word" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_ac_ct_OTOOL+set}" = set; then
+if test "${ac_cv_prog_ac_ct_OTOOL+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$ac_ct_OTOOL"; then
@@ -5500,24 +5604,24 @@ for as_dir in $PATH
 do
   IFS=$as_save_IFS
   test -z "$as_dir" && as_dir=.
-  for ac_exec_ext in '' $ac_executable_extensions; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
   if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
     ac_cv_prog_ac_ct_OTOOL="otool"
-    $as_echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
-done
+  done
 IFS=$as_save_IFS
 
 fi
 fi
 ac_ct_OTOOL=$ac_cv_prog_ac_ct_OTOOL
 if test -n "$ac_ct_OTOOL"; then
-  { $as_echo "$as_me:$LINENO: result: $ac_ct_OTOOL" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_OTOOL" >&5
 $as_echo "$ac_ct_OTOOL" >&6; }
 else
-  { $as_echo "$as_me:$LINENO: result: no" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi
 
@@ -5526,12 +5630,8 @@ fi
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ $as_echo "$as_me:$LINENO: WARNING: In the future, Autoconf will not detect cross-tools
-whose name does not start with the host triplet.  If you think this
-configuration is useful to you, please write to autoconf@gnu.org." >&5
-$as_echo "$as_me: WARNING: In the future, Autoconf will not detect cross-tools
-whose name does not start with the host triplet.  If you think this
-configuration is useful to you, please write to autoconf@gnu.org." >&2;}
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     OTOOL=$ac_ct_OTOOL
@@ -5543,9 +5643,9 @@ fi
     if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}otool64", so it can be a program name with args.
 set dummy ${ac_tool_prefix}otool64; ac_word=$2
-{ $as_echo "$as_me:$LINENO: checking for $ac_word" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_OTOOL64+set}" = set; then
+if test "${ac_cv_prog_OTOOL64+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$OTOOL64"; then
@@ -5556,24 +5656,24 @@ for as_dir in $PATH
 do
   IFS=$as_save_IFS
   test -z "$as_dir" && as_dir=.
-  for ac_exec_ext in '' $ac_executable_extensions; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
   if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
     ac_cv_prog_OTOOL64="${ac_tool_prefix}otool64"
-    $as_echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
-done
+  done
 IFS=$as_save_IFS
 
 fi
 fi
 OTOOL64=$ac_cv_prog_OTOOL64
 if test -n "$OTOOL64"; then
-  { $as_echo "$as_me:$LINENO: result: $OTOOL64" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $OTOOL64" >&5
 $as_echo "$OTOOL64" >&6; }
 else
-  { $as_echo "$as_me:$LINENO: result: no" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi
 
@@ -5583,9 +5683,9 @@ if test -z "$ac_cv_prog_OTOOL64"; then
   ac_ct_OTOOL64=$OTOOL64
   # Extract the first word of "otool64", so it can be a program name with args.
 set dummy otool64; ac_word=$2
-{ $as_echo "$as_me:$LINENO: checking for $ac_word" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_ac_ct_OTOOL64+set}" = set; then
+if test "${ac_cv_prog_ac_ct_OTOOL64+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$ac_ct_OTOOL64"; then
@@ -5596,24 +5696,24 @@ for as_dir in $PATH
 do
   IFS=$as_save_IFS
   test -z "$as_dir" && as_dir=.
-  for ac_exec_ext in '' $ac_executable_extensions; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
   if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
     ac_cv_prog_ac_ct_OTOOL64="otool64"
-    $as_echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
-done
+  done
 IFS=$as_save_IFS
 
 fi
 fi
 ac_ct_OTOOL64=$ac_cv_prog_ac_ct_OTOOL64
 if test -n "$ac_ct_OTOOL64"; then
-  { $as_echo "$as_me:$LINENO: result: $ac_ct_OTOOL64" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_OTOOL64" >&5
 $as_echo "$ac_ct_OTOOL64" >&6; }
 else
-  { $as_echo "$as_me:$LINENO: result: no" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi
 
@@ -5622,12 +5722,8 @@ fi
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ $as_echo "$as_me:$LINENO: WARNING: In the future, Autoconf will not detect cross-tools
-whose name does not start with the host triplet.  If you think this
-configuration is useful to you, please write to autoconf@gnu.org." >&5
-$as_echo "$as_me: WARNING: In the future, Autoconf will not detect cross-tools
-whose name does not start with the host triplet.  If you think this
-configuration is useful to you, please write to autoconf@gnu.org." >&2;}
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     OTOOL64=$ac_ct_OTOOL64
@@ -5662,9 +5758,9 @@ fi
 
 
 
-    { $as_echo "$as_me:$LINENO: checking for -single_module linker flag" >&5
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for -single_module linker flag" >&5
 $as_echo_n "checking for -single_module linker flag... " >&6; }
-if test "${lt_cv_apple_cc_single_mod+set}" = set; then
+if test "${lt_cv_apple_cc_single_mod+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   lt_cv_apple_cc_single_mod=no
@@ -5689,22 +5785,18 @@ else
 	rm -f conftest.*
       fi
 fi
-{ $as_echo "$as_me:$LINENO: result: $lt_cv_apple_cc_single_mod" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_apple_cc_single_mod" >&5
 $as_echo "$lt_cv_apple_cc_single_mod" >&6; }
-    { $as_echo "$as_me:$LINENO: checking for -exported_symbols_list linker flag" >&5
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for -exported_symbols_list linker flag" >&5
 $as_echo_n "checking for -exported_symbols_list linker flag... " >&6; }
-if test "${lt_cv_ld_exported_symbols_list+set}" = set; then
+if test "${lt_cv_ld_exported_symbols_list+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   lt_cv_ld_exported_symbols_list=no
       save_LDFLAGS=$LDFLAGS
       echo "_main" > conftest.sym
       LDFLAGS="$LDFLAGS -Wl,-exported_symbols_list,conftest.sym"
-      cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
+      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
@@ -5715,42 +5807,17 @@ main ()
   return 0;
 }
 _ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (ac_try="$ac_link"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_link") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest$ac_exeext && {
-	 test "$cross_compiling" = yes ||
-	 $as_test_x conftest$ac_exeext
-       }; then
+if ac_fn_c_try_link "$LINENO"; then :
   lt_cv_ld_exported_symbols_list=yes
 else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-	lt_cv_ld_exported_symbols_list=no
+  lt_cv_ld_exported_symbols_list=no
 fi
-
-rm -rf conftest.dSYM
-rm -f core conftest.err conftest.$ac_objext conftest_ipa8_conftest.oo \
-      conftest$ac_exeext conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
 	LDFLAGS="$save_LDFLAGS"
 
 fi
-{ $as_echo "$as_me:$LINENO: result: $lt_cv_ld_exported_symbols_list" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_ld_exported_symbols_list" >&5
 $as_echo "$lt_cv_ld_exported_symbols_list" >&6; }
     case $host_os in
     rhapsody* | darwin1.[012])
@@ -5792,14 +5859,14 @@ ac_cpp='$CPP $CPPFLAGS'
 ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
 ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
 ac_compiler_gnu=$ac_cv_c_compiler_gnu
-{ $as_echo "$as_me:$LINENO: checking how to run the C preprocessor" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking how to run the C preprocessor" >&5
 $as_echo_n "checking how to run the C preprocessor... " >&6; }
 # On Suns, sometimes $CPP names a directory.
 if test -n "$CPP" && test -d "$CPP"; then
   CPP=
 fi
 if test -z "$CPP"; then
-  if test "${ac_cv_prog_CPP+set}" = set; then
+  if test "${ac_cv_prog_CPP+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
       # Double quotes because CPP needs to be expanded
@@ -5814,11 +5881,7 @@ do
   # <limits.h> exists even on freestanding compilers.
   # On the NeXT, cc -E runs the code through the compiler's parser,
   # not just through cpp. "Syntax error" is here to catch this case.
-  cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #ifdef __STDC__
 # include <limits.h>
@@ -5827,78 +5890,34 @@ cat >>conftest.$ac_ext <<_ACEOF
 #endif
 		     Syntax error
 _ACEOF
-if { (ac_try="$ac_cpp conftest.$ac_ext"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_cpp conftest.$ac_ext") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } >/dev/null && {
-	 test -z "$ac_c_preproc_warn_flag$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       }; then
-  :
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
+if ac_fn_c_try_cpp "$LINENO"; then :
 
+else
   # Broken: fails on valid input.
 continue
 fi
-
-rm -f conftest.err conftest.$ac_ext
+rm -f conftest.err conftest.i conftest.$ac_ext
 
   # OK, works on sane cases.  Now check whether nonexistent headers
   # can be detected and how.
-  cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <ac_nonexistent.h>
 _ACEOF
-if { (ac_try="$ac_cpp conftest.$ac_ext"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_cpp conftest.$ac_ext") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } >/dev/null && {
-	 test -z "$ac_c_preproc_warn_flag$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       }; then
+if ac_fn_c_try_cpp "$LINENO"; then :
   # Broken: success on invalid input.
 continue
 else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
   # Passes both tests.
 ac_preproc_ok=:
 break
 fi
-
-rm -f conftest.err conftest.$ac_ext
+rm -f conftest.err conftest.i conftest.$ac_ext
 
 done
 # Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped.
-rm -f conftest.err conftest.$ac_ext
-if $ac_preproc_ok; then
+rm -f conftest.i conftest.err conftest.$ac_ext
+if $ac_preproc_ok; then :
   break
 fi
 
@@ -5910,7 +5929,7 @@ fi
 else
   ac_cv_prog_CPP=$CPP
 fi
-{ $as_echo "$as_me:$LINENO: result: $CPP" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $CPP" >&5
 $as_echo "$CPP" >&6; }
 ac_preproc_ok=false
 for ac_c_preproc_warn_flag in '' yes
@@ -5921,11 +5940,7 @@ do
   # <limits.h> exists even on freestanding compilers.
   # On the NeXT, cc -E runs the code through the compiler's parser,
   # not just through cpp. "Syntax error" is here to catch this case.
-  cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #ifdef __STDC__
 # include <limits.h>
@@ -5934,85 +5949,40 @@ cat >>conftest.$ac_ext <<_ACEOF
 #endif
 		     Syntax error
 _ACEOF
-if { (ac_try="$ac_cpp conftest.$ac_ext"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_cpp conftest.$ac_ext") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } >/dev/null && {
-	 test -z "$ac_c_preproc_warn_flag$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       }; then
-  :
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
+if ac_fn_c_try_cpp "$LINENO"; then :
 
+else
   # Broken: fails on valid input.
 continue
 fi
-
-rm -f conftest.err conftest.$ac_ext
+rm -f conftest.err conftest.i conftest.$ac_ext
 
   # OK, works on sane cases.  Now check whether nonexistent headers
   # can be detected and how.
-  cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <ac_nonexistent.h>
 _ACEOF
-if { (ac_try="$ac_cpp conftest.$ac_ext"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_cpp conftest.$ac_ext") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } >/dev/null && {
-	 test -z "$ac_c_preproc_warn_flag$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       }; then
+if ac_fn_c_try_cpp "$LINENO"; then :
   # Broken: success on invalid input.
 continue
 else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
   # Passes both tests.
 ac_preproc_ok=:
 break
 fi
-
-rm -f conftest.err conftest.$ac_ext
+rm -f conftest.err conftest.i conftest.$ac_ext
 
 done
 # Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped.
-rm -f conftest.err conftest.$ac_ext
-if $ac_preproc_ok; then
-  :
+rm -f conftest.i conftest.err conftest.$ac_ext
+if $ac_preproc_ok; then :
+
 else
-  { { $as_echo "$as_me:$LINENO: error: C preprocessor \"$CPP\" fails sanity check
-See \`config.log' for more details." >&5
-$as_echo "$as_me: error: C preprocessor \"$CPP\" fails sanity check
-See \`config.log' for more details." >&2;}
-   { (exit 1); exit 1; }; }
+  { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "C preprocessor \"$CPP\" fails sanity check
+See \`config.log' for more details" "$LINENO" 5 ; }
 fi
 
 ac_ext=c
@@ -6022,16 +5992,12 @@ ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $
 ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 
-{ $as_echo "$as_me:$LINENO: checking for ANSI C header files" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for ANSI C header files" >&5
 $as_echo_n "checking for ANSI C header files... " >&6; }
-if test "${ac_cv_header_stdc+set}" = set; then
+if test "${ac_cv_header_stdc+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
-  cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <stdlib.h>
 #include <stdarg.h>
@@ -6046,48 +6012,23 @@ main ()
   return 0;
 }
 _ACEOF
-rm -f conftest.$ac_objext
-if { (ac_try="$ac_compile"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_compile") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest.$ac_objext; then
+if ac_fn_c_try_compile "$LINENO"; then :
   ac_cv_header_stdc=yes
 else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-	ac_cv_header_stdc=no
+  ac_cv_header_stdc=no
 fi
-
 rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
 
 if test $ac_cv_header_stdc = yes; then
   # SunOS 4.x string.h does not declare mem*, contrary to ANSI.
-  cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <string.h>
 
 _ACEOF
 if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
-  $EGREP "memchr" >/dev/null 2>&1; then
-  :
+  $EGREP "memchr" >/dev/null 2>&1; then :
+
 else
   ac_cv_header_stdc=no
 fi
@@ -6097,18 +6038,14 @@ fi
 
 if test $ac_cv_header_stdc = yes; then
   # ISC 2.0.2 stdlib.h does not declare free, contrary to ANSI.
-  cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <stdlib.h>
 
 _ACEOF
 if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
-  $EGREP "free" >/dev/null 2>&1; then
-  :
+  $EGREP "free" >/dev/null 2>&1; then :
+
 else
   ac_cv_header_stdc=no
 fi
@@ -6118,14 +6055,10 @@ fi
 
 if test $ac_cv_header_stdc = yes; then
   # /bin/cc in Irix-4.0.5 gets non-ANSI ctype macros unless using -ansi.
-  if test "$cross_compiling" = yes; then
+  if test "$cross_compiling" = yes; then :
   :
 else
-  cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <ctype.h>
 #include <stdlib.h>
@@ -6152,117 +6085,33 @@ main ()
   return 0;
 }
 _ACEOF
-rm -f conftest$ac_exeext
-if { (ac_try="$ac_link"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_link") 2>&5
-  ac_status=$?
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && { ac_try='./conftest$ac_exeext'
-  { (case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_try") 2>&5
-  ac_status=$?
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  :
+if ac_fn_c_try_run "$LINENO"; then :
+
 else
-  $as_echo "$as_me: program exited with status $ac_status" >&5
-$as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-( exit $ac_status )
-ac_cv_header_stdc=no
+  ac_cv_header_stdc=no
 fi
-rm -rf conftest.dSYM
-rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext conftest.$ac_objext conftest.$ac_ext
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
-
 fi
 fi
-{ $as_echo "$as_me:$LINENO: result: $ac_cv_header_stdc" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_header_stdc" >&5
 $as_echo "$ac_cv_header_stdc" >&6; }
 if test $ac_cv_header_stdc = yes; then
 
-cat >>confdefs.h <<\_ACEOF
-#define STDC_HEADERS 1
-_ACEOF
+$as_echo "#define STDC_HEADERS 1" >>confdefs.h
 
 fi
 
 # On IRIX 5.3, sys/types and inttypes.h are conflicting.
-
-
-
-
-
-
-
-
-
 for ac_header in sys/types.h sys/stat.h stdlib.h string.h memory.h strings.h \
 		  inttypes.h stdint.h unistd.h
-do
-as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
-{ $as_echo "$as_me:$LINENO: checking for $ac_header" >&5
-$as_echo_n "checking for $ac_header... " >&6; }
-if { as_var=$as_ac_Header; eval "test \"\${$as_var+set}\" = set"; }; then
-  $as_echo_n "(cached) " >&6
-else
-  cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-$ac_includes_default
-
-#include <$ac_header>
-_ACEOF
-rm -f conftest.$ac_objext
-if { (ac_try="$ac_compile"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_compile") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest.$ac_objext; then
-  eval "$as_ac_Header=yes"
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-	eval "$as_ac_Header=no"
-fi
-
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-ac_res=`eval 'as_val=${'$as_ac_Header'}
-		 $as_echo "$as_val"'`
-	       { $as_echo "$as_me:$LINENO: result: $ac_res" >&5
-$as_echo "$ac_res" >&6; }
-if test `eval 'as_val=${'$as_ac_Header'}
-		 $as_echo "$as_val"'` = yes; then
+do :
+  as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
+ac_fn_c_check_header_compile "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default
+"
+if eval test \"x\$"$as_ac_Header"\" = x"yes"; then :
   cat >>confdefs.h <<_ACEOF
 #define `$as_echo "HAVE_$ac_header" | $as_tr_cpp` 1
 _ACEOF
@@ -6272,61 +6121,13 @@ fi
 done
 
 
-
 for ac_header in dlfcn.h
-do
-as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
-{ $as_echo "$as_me:$LINENO: checking for $ac_header" >&5
-$as_echo_n "checking for $ac_header... " >&6; }
-if { as_var=$as_ac_Header; eval "test \"\${$as_var+set}\" = set"; }; then
-  $as_echo_n "(cached) " >&6
-else
-  cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-$ac_includes_default
-
-#include <$ac_header>
-_ACEOF
-rm -f conftest.$ac_objext
-if { (ac_try="$ac_compile"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_compile") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest.$ac_objext; then
-  eval "$as_ac_Header=yes"
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-	eval "$as_ac_Header=no"
-fi
-
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-ac_res=`eval 'as_val=${'$as_ac_Header'}
-		 $as_echo "$as_val"'`
-	       { $as_echo "$as_me:$LINENO: result: $ac_res" >&5
-$as_echo "$ac_res" >&6; }
-if test `eval 'as_val=${'$as_ac_Header'}
-		 $as_echo "$as_val"'` = yes; then
+do :
+  ac_fn_c_check_header_compile "$LINENO" "dlfcn.h" "ac_cv_header_dlfcn_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_dlfcn_h" = x""yes; then :
   cat >>confdefs.h <<_ACEOF
-#define `$as_echo "HAVE_$ac_header" | $as_tr_cpp` 1
+#define HAVE_DLFCN_H 1
 _ACEOF
 
 fi
@@ -6346,7 +6147,7 @@ done
 
 
             # Check whether --enable-shared was given.
-if test "${enable_shared+set}" = set; then
+if test "${enable_shared+set}" = set; then :
   enableval=$enable_shared; p=${PACKAGE-default}
     case $enableval in
     yes) enable_shared=yes ;;
@@ -6377,7 +6178,7 @@ fi
 
 
   # Check whether --enable-static was given.
-if test "${enable_static+set}" = set; then
+if test "${enable_static+set}" = set; then :
   enableval=$enable_static; p=${PACKAGE-default}
     case $enableval in
     yes) enable_static=yes ;;
@@ -6409,7 +6210,7 @@ fi
 
 
 # Check whether --with-pic was given.
-if test "${with_pic+set}" = set; then
+if test "${with_pic+set}" = set; then :
   withval=$with_pic; pic_mode="$withval"
 else
   pic_mode=default
@@ -6425,7 +6226,7 @@ test -z "$pic_mode" && pic_mode=default
 
 
   # Check whether --enable-fast-install was given.
-if test "${enable_fast_install+set}" = set; then
+if test "${enable_fast_install+set}" = set; then :
   enableval=$enable_fast_install; p=${PACKAGE-default}
     case $enableval in
     yes) enable_fast_install=yes ;;
@@ -6506,9 +6307,9 @@ if test -n "${ZSH_VERSION+set}" ; then
    setopt NO_GLOB_SUBST
 fi
 
-{ $as_echo "$as_me:$LINENO: checking for objdir" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for objdir" >&5
 $as_echo_n "checking for objdir... " >&6; }
-if test "${lt_cv_objdir+set}" = set; then
+if test "${lt_cv_objdir+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   rm -f .libs 2>/dev/null
@@ -6521,7 +6322,7 @@ else
 fi
 rmdir .libs 2>/dev/null
 fi
-{ $as_echo "$as_me:$LINENO: result: $lt_cv_objdir" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_objdir" >&5
 $as_echo "$lt_cv_objdir" >&6; }
 objdir=$lt_cv_objdir
 
@@ -6614,9 +6415,9 @@ test -z "$MAGIC_CMD" && MAGIC_CMD=file
 case $deplibs_check_method in
 file_magic*)
   if test "$file_magic_cmd" = '$MAGIC_CMD'; then
-    { $as_echo "$as_me:$LINENO: checking for ${ac_tool_prefix}file" >&5
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ${ac_tool_prefix}file" >&5
 $as_echo_n "checking for ${ac_tool_prefix}file... " >&6; }
-if test "${lt_cv_path_MAGIC_CMD+set}" = set; then
+if test "${lt_cv_path_MAGIC_CMD+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   case $MAGIC_CMD in
@@ -6667,10 +6468,10 @@ fi
 
 MAGIC_CMD="$lt_cv_path_MAGIC_CMD"
 if test -n "$MAGIC_CMD"; then
-  { $as_echo "$as_me:$LINENO: result: $MAGIC_CMD" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $MAGIC_CMD" >&5
 $as_echo "$MAGIC_CMD" >&6; }
 else
-  { $as_echo "$as_me:$LINENO: result: no" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi
 
@@ -6680,9 +6481,9 @@ fi
 
 if test -z "$lt_cv_path_MAGIC_CMD"; then
   if test -n "$ac_tool_prefix"; then
-    { $as_echo "$as_me:$LINENO: checking for file" >&5
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for file" >&5
 $as_echo_n "checking for file... " >&6; }
-if test "${lt_cv_path_MAGIC_CMD+set}" = set; then
+if test "${lt_cv_path_MAGIC_CMD+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   case $MAGIC_CMD in
@@ -6733,10 +6534,10 @@ fi
 
 MAGIC_CMD="$lt_cv_path_MAGIC_CMD"
 if test -n "$MAGIC_CMD"; then
-  { $as_echo "$as_me:$LINENO: result: $MAGIC_CMD" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $MAGIC_CMD" >&5
 $as_echo "$MAGIC_CMD" >&6; }
 else
-  { $as_echo "$as_me:$LINENO: result: no" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi
 
@@ -6813,9 +6614,9 @@ lt_prog_compiler_no_builtin_flag=
 if test "$GCC" = yes; then
   lt_prog_compiler_no_builtin_flag=' -fno-builtin'
 
-  { $as_echo "$as_me:$LINENO: checking if $compiler supports -fno-rtti -fno-exceptions" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking if $compiler supports -fno-rtti -fno-exceptions" >&5
 $as_echo_n "checking if $compiler supports -fno-rtti -fno-exceptions... " >&6; }
-if test "${lt_cv_prog_compiler_rtti_exceptions+set}" = set; then
+if test "${lt_cv_prog_compiler_rtti_exceptions+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   lt_cv_prog_compiler_rtti_exceptions=no
@@ -6831,11 +6632,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:6834: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:6635: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:6838: \$? = $ac_status" >&5
+   echo "$as_me:6639: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings other than the usual output.
@@ -6848,7 +6649,7 @@ else
    $RM conftest*
 
 fi
-{ $as_echo "$as_me:$LINENO: result: $lt_cv_prog_compiler_rtti_exceptions" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_rtti_exceptions" >&5
 $as_echo "$lt_cv_prog_compiler_rtti_exceptions" >&6; }
 
 if test x"$lt_cv_prog_compiler_rtti_exceptions" = xyes; then
@@ -6868,7 +6669,7 @@ fi
 lt_prog_compiler_pic=
 lt_prog_compiler_static=
 
-{ $as_echo "$as_me:$LINENO: checking for $compiler option to produce PIC" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $compiler option to produce PIC" >&5
 $as_echo_n "checking for $compiler option to produce PIC... " >&6; }
 
   if test "$GCC" = yes; then
@@ -7140,7 +6941,7 @@ case $host_os in
     lt_prog_compiler_pic="$lt_prog_compiler_pic -DPIC"
     ;;
 esac
-{ $as_echo "$as_me:$LINENO: result: $lt_prog_compiler_pic" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_prog_compiler_pic" >&5
 $as_echo "$lt_prog_compiler_pic" >&6; }
 
 
@@ -7152,9 +6953,9 @@ $as_echo "$lt_prog_compiler_pic" >&6; }
 # Check to make sure the PIC flag actually works.
 #
 if test -n "$lt_prog_compiler_pic"; then
-  { $as_echo "$as_me:$LINENO: checking if $compiler PIC flag $lt_prog_compiler_pic works" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking if $compiler PIC flag $lt_prog_compiler_pic works" >&5
 $as_echo_n "checking if $compiler PIC flag $lt_prog_compiler_pic works... " >&6; }
-if test "${lt_cv_prog_compiler_pic_works+set}" = set; then
+if test "${lt_cv_prog_compiler_pic_works+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   lt_cv_prog_compiler_pic_works=no
@@ -7170,11 +6971,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:7173: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:6974: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:7177: \$? = $ac_status" >&5
+   echo "$as_me:6978: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings other than the usual output.
@@ -7187,7 +6988,7 @@ else
    $RM conftest*
 
 fi
-{ $as_echo "$as_me:$LINENO: result: $lt_cv_prog_compiler_pic_works" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_pic_works" >&5
 $as_echo "$lt_cv_prog_compiler_pic_works" >&6; }
 
 if test x"$lt_cv_prog_compiler_pic_works" = xyes; then
@@ -7211,9 +7012,9 @@ fi
 # Check to make sure the static flag actually works.
 #
 wl=$lt_prog_compiler_wl eval lt_tmp_static_flag=\"$lt_prog_compiler_static\"
-{ $as_echo "$as_me:$LINENO: checking if $compiler static flag $lt_tmp_static_flag works" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if $compiler static flag $lt_tmp_static_flag works" >&5
 $as_echo_n "checking if $compiler static flag $lt_tmp_static_flag works... " >&6; }
-if test "${lt_cv_prog_compiler_static_works+set}" = set; then
+if test "${lt_cv_prog_compiler_static_works+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   lt_cv_prog_compiler_static_works=no
@@ -7239,7 +7040,7 @@ else
    LDFLAGS="$save_LDFLAGS"
 
 fi
-{ $as_echo "$as_me:$LINENO: result: $lt_cv_prog_compiler_static_works" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_static_works" >&5
 $as_echo "$lt_cv_prog_compiler_static_works" >&6; }
 
 if test x"$lt_cv_prog_compiler_static_works" = xyes; then
@@ -7254,9 +7055,9 @@ fi
 
 
 
-  { $as_echo "$as_me:$LINENO: checking if $compiler supports -c -o file.$ac_objext" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking if $compiler supports -c -o file.$ac_objext" >&5
 $as_echo_n "checking if $compiler supports -c -o file.$ac_objext... " >&6; }
-if test "${lt_cv_prog_compiler_c_o+set}" = set; then
+if test "${lt_cv_prog_compiler_c_o+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   lt_cv_prog_compiler_c_o=no
@@ -7275,11 +7076,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:7278: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:7079: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:7282: \$? = $ac_status" >&5
+   echo "$as_me:7083: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -7301,7 +7102,7 @@ else
    $RM conftest*
 
 fi
-{ $as_echo "$as_me:$LINENO: result: $lt_cv_prog_compiler_c_o" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_c_o" >&5
 $as_echo "$lt_cv_prog_compiler_c_o" >&6; }
 
 
@@ -7309,9 +7110,9 @@ $as_echo "$lt_cv_prog_compiler_c_o" >&6; }
 
 
 
-  { $as_echo "$as_me:$LINENO: checking if $compiler supports -c -o file.$ac_objext" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking if $compiler supports -c -o file.$ac_objext" >&5
 $as_echo_n "checking if $compiler supports -c -o file.$ac_objext... " >&6; }
-if test "${lt_cv_prog_compiler_c_o+set}" = set; then
+if test "${lt_cv_prog_compiler_c_o+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   lt_cv_prog_compiler_c_o=no
@@ -7330,11 +7131,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:7333: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:7134: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:7337: \$? = $ac_status" >&5
+   echo "$as_me:7138: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -7356,7 +7157,7 @@ else
    $RM conftest*
 
 fi
-{ $as_echo "$as_me:$LINENO: result: $lt_cv_prog_compiler_c_o" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_c_o" >&5
 $as_echo "$lt_cv_prog_compiler_c_o" >&6; }
 
 
@@ -7365,7 +7166,7 @@ $as_echo "$lt_cv_prog_compiler_c_o" >&6; }
 hard_links="nottested"
 if test "$lt_cv_prog_compiler_c_o" = no && test "$need_locks" != no; then
   # do not overwrite the value of need_locks provided by the user
-  { $as_echo "$as_me:$LINENO: checking if we can lock with hard links" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking if we can lock with hard links" >&5
 $as_echo_n "checking if we can lock with hard links... " >&6; }
   hard_links=yes
   $RM conftest*
@@ -7373,10 +7174,10 @@ $as_echo_n "checking if we can lock with hard links... " >&6; }
   touch conftest.a
   ln conftest.a conftest.b 2>&5 || hard_links=no
   ln conftest.a conftest.b 2>/dev/null && hard_links=no
-  { $as_echo "$as_me:$LINENO: result: $hard_links" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $hard_links" >&5
 $as_echo "$hard_links" >&6; }
   if test "$hard_links" = no; then
-    { $as_echo "$as_me:$LINENO: WARNING: \`$CC' does not support \`-c -o', so \`make -j' may be unsafe" >&5
+    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: \`$CC' does not support \`-c -o', so \`make -j' may be unsafe" >&5
 $as_echo "$as_me: WARNING: \`$CC' does not support \`-c -o', so \`make -j' may be unsafe" >&2;}
     need_locks=warn
   fi
@@ -7389,7 +7190,7 @@ fi
 
 
 
-  { $as_echo "$as_me:$LINENO: checking whether the $compiler linker ($LD) supports shared libraries" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the $compiler linker ($LD) supports shared libraries" >&5
 $as_echo_n "checking whether the $compiler linker ($LD) supports shared libraries... " >&6; }
 
   runpath_var=
@@ -7831,11 +7632,7 @@ _LT_EOF
 	allow_undefined_flag='-berok'
         # Determine the default libpath from the value encoded in an
         # empty executable.
-        cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
+        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
@@ -7846,27 +7643,7 @@ main ()
   return 0;
 }
 _ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (ac_try="$ac_link"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_link") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest$ac_exeext && {
-	 test "$cross_compiling" = yes ||
-	 $as_test_x conftest$ac_exeext
-       }; then
+if ac_fn_c_try_link "$LINENO"; then :
 
 lt_aix_libpath_sed='
     /Import File Strings/,/^$/ {
@@ -7880,16 +7657,9 @@ aix_libpath=`dump -H conftest$ac_exeext 2>/dev/null | $SED -n -e "$lt_aix_libpat
 if test -z "$aix_libpath"; then
   aix_libpath=`dump -HX64 conftest$ac_exeext 2>/dev/null | $SED -n -e "$lt_aix_libpath_sed"`
 fi
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-
 fi
-
-rm -rf conftest.dSYM
-rm -f core conftest.err conftest.$ac_objext conftest_ipa8_conftest.oo \
-      conftest$ac_exeext conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
 if test -z "$aix_libpath"; then aix_libpath="/usr/lib:/lib"; fi
 
         hardcode_libdir_flag_spec='${wl}-blibpath:$libdir:'"$aix_libpath"
@@ -7902,11 +7672,7 @@ if test -z "$aix_libpath"; then aix_libpath="/usr/lib:/lib"; fi
 	else
 	 # Determine the default libpath from the value encoded in an
 	 # empty executable.
-	 cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
+	 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
@@ -7917,27 +7683,7 @@ main ()
   return 0;
 }
 _ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (ac_try="$ac_link"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_link") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest$ac_exeext && {
-	 test "$cross_compiling" = yes ||
-	 $as_test_x conftest$ac_exeext
-       }; then
+if ac_fn_c_try_link "$LINENO"; then :
 
 lt_aix_libpath_sed='
     /Import File Strings/,/^$/ {
@@ -7951,16 +7697,9 @@ aix_libpath=`dump -H conftest$ac_exeext 2>/dev/null | $SED -n -e "$lt_aix_libpat
 if test -z "$aix_libpath"; then
   aix_libpath=`dump -HX64 conftest$ac_exeext 2>/dev/null | $SED -n -e "$lt_aix_libpath_sed"`
 fi
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-
 fi
-
-rm -rf conftest.dSYM
-rm -f core conftest.err conftest.$ac_objext conftest_ipa8_conftest.oo \
-      conftest$ac_exeext conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
 if test -z "$aix_libpath"; then aix_libpath="/usr/lib:/lib"; fi
 
 	 hardcode_libdir_flag_spec='${wl}-blibpath:$libdir:'"$aix_libpath"
@@ -8172,42 +7911,16 @@ if test -z "$aix_libpath"; then aix_libpath="/usr/lib:/lib"; fi
 	# implicitly export all symbols.
         save_LDFLAGS="$LDFLAGS"
         LDFLAGS="$LDFLAGS -shared ${wl}-exported_symbol ${wl}foo ${wl}-update_registry ${wl}/dev/null"
-        cat >conftest.$ac_ext <<_ACEOF
+        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
 int foo(void) {}
 _ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (ac_try="$ac_link"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_link") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest$ac_exeext && {
-	 test "$cross_compiling" = yes ||
-	 $as_test_x conftest$ac_exeext
-       }; then
+if ac_fn_c_try_link "$LINENO"; then :
   archive_expsym_cmds='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname ${wl}$soname `test -n "$verstring" && $ECHO "X${wl}-set_version ${wl}$verstring" | $Xsed` ${wl}-update_registry ${wl}${output_objdir}/so_locations ${wl}-exports_file ${wl}$export_symbols -o $lib'
 
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-
 fi
-
-rm -rf conftest.dSYM
-rm -f core conftest.err conftest.$ac_objext conftest_ipa8_conftest.oo \
-      conftest$ac_exeext conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
         LDFLAGS="$save_LDFLAGS"
       else
 	archive_cmds='$CC -shared $libobjs $deplibs $compiler_flags -soname $soname `test -n "$verstring" && $ECHO "X-set_version $verstring" | $Xsed` -update_registry ${output_objdir}/so_locations -o $lib'
@@ -8463,7 +8176,7 @@ rm -f core conftest.err conftest.$ac_objext conftest_ipa8_conftest.oo \
     fi
   fi
 
-{ $as_echo "$as_me:$LINENO: result: $ld_shlibs" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ld_shlibs" >&5
 $as_echo "$ld_shlibs" >&6; }
 test "$ld_shlibs" = no && can_build_shared=no
 
@@ -8500,16 +8213,16 @@ x|xyes)
       # Test whether the compiler implicitly links with -lc since on some
       # systems, -lgcc has to come before -lc. If gcc already passes -lc
       # to ld, don't add -lc before -lgcc.
-      { $as_echo "$as_me:$LINENO: checking whether -lc should be explicitly linked in" >&5
+      { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether -lc should be explicitly linked in" >&5
 $as_echo_n "checking whether -lc should be explicitly linked in... " >&6; }
       $RM conftest*
       echo "$lt_simple_compile_test_code" > conftest.$ac_ext
 
-      if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+      if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
   (eval $ac_compile) 2>&5
   ac_status=$?
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } 2>conftest.err; then
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } 2>conftest.err; then
         soname=conftest
         lib=conftest
         libobjs=conftest.$ac_objext
@@ -8523,11 +8236,11 @@ $as_echo_n "checking whether -lc should be explicitly linked in... " >&6; }
         libname=conftest
         lt_save_allow_undefined_flag=$allow_undefined_flag
         allow_undefined_flag=
-        if { (eval echo "$as_me:$LINENO: \"$archive_cmds 2\>\&1 \| $GREP \" -lc \" \>/dev/null 2\>\&1\"") >&5
+        if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$archive_cmds 2\>\&1 \| $GREP \" -lc \" \>/dev/null 2\>\&1\""; } >&5
   (eval $archive_cmds 2\>\&1 \| $GREP \" -lc \" \>/dev/null 2\>\&1) 2>&5
   ac_status=$?
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }
         then
 	  archive_cmds_need_lc=no
         else
@@ -8538,7 +8251,7 @@ $as_echo_n "checking whether -lc should be explicitly linked in... " >&6; }
         cat conftest.err 1>&5
       fi
       $RM conftest*
-      { $as_echo "$as_me:$LINENO: result: $archive_cmds_need_lc" >&5
+      { $as_echo "$as_me:${as_lineno-$LINENO}: result: $archive_cmds_need_lc" >&5
 $as_echo "$archive_cmds_need_lc" >&6; }
       ;;
     esac
@@ -8702,7 +8415,7 @@ esac
 
 
 
-  { $as_echo "$as_me:$LINENO: checking dynamic linker characteristics" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking dynamic linker characteristics" >&5
 $as_echo_n "checking dynamic linker characteristics... " >&6; }
 
 if test "$GCC" = yes; then
@@ -9137,11 +8850,7 @@ linux* | k*bsd*-gnu)
   save_libdir=$libdir
   eval "libdir=/foo; wl=\"$lt_prog_compiler_wl\"; \
        LDFLAGS=\"\$LDFLAGS $hardcode_libdir_flag_spec\""
-  cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
@@ -9152,41 +8861,13 @@ main ()
   return 0;
 }
 _ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (ac_try="$ac_link"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_link") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest$ac_exeext && {
-	 test "$cross_compiling" = yes ||
-	 $as_test_x conftest$ac_exeext
-       }; then
-  if  ($OBJDUMP -p conftest$ac_exeext) 2>/dev/null | grep "RUNPATH.*$libdir" >/dev/null; then
+if ac_fn_c_try_link "$LINENO"; then :
+  if  ($OBJDUMP -p conftest$ac_exeext) 2>/dev/null | grep "RUNPATH.*$libdir" >/dev/null; then :
   shlibpath_overrides_runpath=yes
 fi
-
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-
 fi
-
-rm -rf conftest.dSYM
-rm -f core conftest.err conftest.$ac_objext conftest_ipa8_conftest.oo \
-      conftest$ac_exeext conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
   LDFLAGS=$save_LDFLAGS
   libdir=$save_libdir
 
@@ -9398,7 +9079,7 @@ uts4*)
   dynamic_linker=no
   ;;
 esac
-{ $as_echo "$as_me:$LINENO: result: $dynamic_linker" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $dynamic_linker" >&5
 $as_echo "$dynamic_linker" >&6; }
 test "$dynamic_linker" = no && can_build_shared=no
 
@@ -9500,7 +9181,7 @@ fi
 
 
 
-  { $as_echo "$as_me:$LINENO: checking how to hardcode library paths into programs" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking how to hardcode library paths into programs" >&5
 $as_echo_n "checking how to hardcode library paths into programs... " >&6; }
 hardcode_action=
 if test -n "$hardcode_libdir_flag_spec" ||
@@ -9525,7 +9206,7 @@ else
   # directories.
   hardcode_action=unsupported
 fi
-{ $as_echo "$as_me:$LINENO: result: $hardcode_action" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $hardcode_action" >&5
 $as_echo "$hardcode_action" >&6; }
 
 if test "$hardcode_action" = relink ||
@@ -9570,18 +9251,14 @@ else
 
   darwin*)
   # if libdl is installed we need to link against it
-    { $as_echo "$as_me:$LINENO: checking for dlopen in -ldl" >&5
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for dlopen in -ldl" >&5
 $as_echo_n "checking for dlopen in -ldl... " >&6; }
-if test "${ac_cv_lib_dl_dlopen+set}" = set; then
+if test "${ac_cv_lib_dl_dlopen+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-ldl  $LIBS"
-cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
@@ -9599,43 +9276,18 @@ return dlopen ();
   return 0;
 }
 _ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (ac_try="$ac_link"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_link") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest$ac_exeext && {
-	 test "$cross_compiling" = yes ||
-	 $as_test_x conftest$ac_exeext
-       }; then
+if ac_fn_c_try_link "$LINENO"; then :
   ac_cv_lib_dl_dlopen=yes
 else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-	ac_cv_lib_dl_dlopen=no
+  ac_cv_lib_dl_dlopen=no
 fi
-
-rm -rf conftest.dSYM
-rm -f core conftest.err conftest.$ac_objext conftest_ipa8_conftest.oo \
-      conftest$ac_exeext conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
-{ $as_echo "$as_me:$LINENO: result: $ac_cv_lib_dl_dlopen" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dl_dlopen" >&5
 $as_echo "$ac_cv_lib_dl_dlopen" >&6; }
-if test $ac_cv_lib_dl_dlopen = yes; then
+if test "x$ac_cv_lib_dl_dlopen" = x""yes; then :
   lt_cv_dlopen="dlopen" lt_cv_dlopen_libs="-ldl"
 else
 
@@ -9648,106 +9300,18 @@ fi
     ;;
 
   *)
-    { $as_echo "$as_me:$LINENO: checking for shl_load" >&5
-$as_echo_n "checking for shl_load... " >&6; }
-if test "${ac_cv_func_shl_load+set}" = set; then
-  $as_echo_n "(cached) " >&6
-else
-  cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-/* Define shl_load to an innocuous variant, in case <limits.h> declares shl_load.
-   For example, HP-UX 11i <limits.h> declares gettimeofday.  */
-#define shl_load innocuous_shl_load
-
-/* System header to define __stub macros and hopefully few prototypes,
-    which can conflict with char shl_load (); below.
-    Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
-    <limits.h> exists even on freestanding compilers.  */
-
-#ifdef __STDC__
-# include <limits.h>
-#else
-# include <assert.h>
-#endif
-
-#undef shl_load
-
-/* Override any GCC internal prototype to avoid an error.
-   Use char because int might match the return type of a GCC
-   builtin and then its argument prototype would still apply.  */
-#ifdef __cplusplus
-extern "C"
-#endif
-char shl_load ();
-/* The GNU C library defines this for functions which it implements
-    to always fail with ENOSYS.  Some functions are actually named
-    something starting with __ and the normal name is an alias.  */
-#if defined __stub_shl_load || defined __stub___shl_load
-choke me
-#endif
-
-int
-main ()
-{
-return shl_load ();
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (ac_try="$ac_link"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_link") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest$ac_exeext && {
-	 test "$cross_compiling" = yes ||
-	 $as_test_x conftest$ac_exeext
-       }; then
-  ac_cv_func_shl_load=yes
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-	ac_cv_func_shl_load=no
-fi
-
-rm -rf conftest.dSYM
-rm -f core conftest.err conftest.$ac_objext conftest_ipa8_conftest.oo \
-      conftest$ac_exeext conftest.$ac_ext
-fi
-{ $as_echo "$as_me:$LINENO: result: $ac_cv_func_shl_load" >&5
-$as_echo "$ac_cv_func_shl_load" >&6; }
-if test $ac_cv_func_shl_load = yes; then
+    ac_fn_c_check_func "$LINENO" "shl_load" "ac_cv_func_shl_load"
+if test "x$ac_cv_func_shl_load" = x""yes; then :
   lt_cv_dlopen="shl_load"
 else
-  { $as_echo "$as_me:$LINENO: checking for shl_load in -ldld" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for shl_load in -ldld" >&5
 $as_echo_n "checking for shl_load in -ldld... " >&6; }
-if test "${ac_cv_lib_dld_shl_load+set}" = set; then
+if test "${ac_cv_lib_dld_shl_load+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-ldld  $LIBS"
-cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
@@ -9765,145 +9329,32 @@ return shl_load ();
   return 0;
 }
 _ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (ac_try="$ac_link"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_link") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest$ac_exeext && {
-	 test "$cross_compiling" = yes ||
-	 $as_test_x conftest$ac_exeext
-       }; then
+if ac_fn_c_try_link "$LINENO"; then :
   ac_cv_lib_dld_shl_load=yes
 else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-	ac_cv_lib_dld_shl_load=no
+  ac_cv_lib_dld_shl_load=no
 fi
-
-rm -rf conftest.dSYM
-rm -f core conftest.err conftest.$ac_objext conftest_ipa8_conftest.oo \
-      conftest$ac_exeext conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
-{ $as_echo "$as_me:$LINENO: result: $ac_cv_lib_dld_shl_load" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dld_shl_load" >&5
 $as_echo "$ac_cv_lib_dld_shl_load" >&6; }
-if test $ac_cv_lib_dld_shl_load = yes; then
+if test "x$ac_cv_lib_dld_shl_load" = x""yes; then :
   lt_cv_dlopen="shl_load" lt_cv_dlopen_libs="-ldld"
 else
-  { $as_echo "$as_me:$LINENO: checking for dlopen" >&5
-$as_echo_n "checking for dlopen... " >&6; }
-if test "${ac_cv_func_dlopen+set}" = set; then
-  $as_echo_n "(cached) " >&6
-else
-  cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-/* Define dlopen to an innocuous variant, in case <limits.h> declares dlopen.
-   For example, HP-UX 11i <limits.h> declares gettimeofday.  */
-#define dlopen innocuous_dlopen
-
-/* System header to define __stub macros and hopefully few prototypes,
-    which can conflict with char dlopen (); below.
-    Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
-    <limits.h> exists even on freestanding compilers.  */
-
-#ifdef __STDC__
-# include <limits.h>
-#else
-# include <assert.h>
-#endif
-
-#undef dlopen
-
-/* Override any GCC internal prototype to avoid an error.
-   Use char because int might match the return type of a GCC
-   builtin and then its argument prototype would still apply.  */
-#ifdef __cplusplus
-extern "C"
-#endif
-char dlopen ();
-/* The GNU C library defines this for functions which it implements
-    to always fail with ENOSYS.  Some functions are actually named
-    something starting with __ and the normal name is an alias.  */
-#if defined __stub_dlopen || defined __stub___dlopen
-choke me
-#endif
-
-int
-main ()
-{
-return dlopen ();
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (ac_try="$ac_link"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_link") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest$ac_exeext && {
-	 test "$cross_compiling" = yes ||
-	 $as_test_x conftest$ac_exeext
-       }; then
-  ac_cv_func_dlopen=yes
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-	ac_cv_func_dlopen=no
-fi
-
-rm -rf conftest.dSYM
-rm -f core conftest.err conftest.$ac_objext conftest_ipa8_conftest.oo \
-      conftest$ac_exeext conftest.$ac_ext
-fi
-{ $as_echo "$as_me:$LINENO: result: $ac_cv_func_dlopen" >&5
-$as_echo "$ac_cv_func_dlopen" >&6; }
-if test $ac_cv_func_dlopen = yes; then
+  ac_fn_c_check_func "$LINENO" "dlopen" "ac_cv_func_dlopen"
+if test "x$ac_cv_func_dlopen" = x""yes; then :
   lt_cv_dlopen="dlopen"
 else
-  { $as_echo "$as_me:$LINENO: checking for dlopen in -ldl" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for dlopen in -ldl" >&5
 $as_echo_n "checking for dlopen in -ldl... " >&6; }
-if test "${ac_cv_lib_dl_dlopen+set}" = set; then
+if test "${ac_cv_lib_dl_dlopen+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-ldl  $LIBS"
-cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
@@ -9921,57 +9372,28 @@ return dlopen ();
   return 0;
 }
 _ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (ac_try="$ac_link"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_link") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest$ac_exeext && {
-	 test "$cross_compiling" = yes ||
-	 $as_test_x conftest$ac_exeext
-       }; then
+if ac_fn_c_try_link "$LINENO"; then :
   ac_cv_lib_dl_dlopen=yes
 else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-	ac_cv_lib_dl_dlopen=no
+  ac_cv_lib_dl_dlopen=no
 fi
-
-rm -rf conftest.dSYM
-rm -f core conftest.err conftest.$ac_objext conftest_ipa8_conftest.oo \
-      conftest$ac_exeext conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
-{ $as_echo "$as_me:$LINENO: result: $ac_cv_lib_dl_dlopen" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dl_dlopen" >&5
 $as_echo "$ac_cv_lib_dl_dlopen" >&6; }
-if test $ac_cv_lib_dl_dlopen = yes; then
+if test "x$ac_cv_lib_dl_dlopen" = x""yes; then :
   lt_cv_dlopen="dlopen" lt_cv_dlopen_libs="-ldl"
 else
-  { $as_echo "$as_me:$LINENO: checking for dlopen in -lsvld" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for dlopen in -lsvld" >&5
 $as_echo_n "checking for dlopen in -lsvld... " >&6; }
-if test "${ac_cv_lib_svld_dlopen+set}" = set; then
+if test "${ac_cv_lib_svld_dlopen+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-lsvld  $LIBS"
-cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
@@ -9989,57 +9411,28 @@ return dlopen ();
   return 0;
 }
 _ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (ac_try="$ac_link"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_link") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest$ac_exeext && {
-	 test "$cross_compiling" = yes ||
-	 $as_test_x conftest$ac_exeext
-       }; then
+if ac_fn_c_try_link "$LINENO"; then :
   ac_cv_lib_svld_dlopen=yes
 else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-	ac_cv_lib_svld_dlopen=no
+  ac_cv_lib_svld_dlopen=no
 fi
-
-rm -rf conftest.dSYM
-rm -f core conftest.err conftest.$ac_objext conftest_ipa8_conftest.oo \
-      conftest$ac_exeext conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
-{ $as_echo "$as_me:$LINENO: result: $ac_cv_lib_svld_dlopen" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_svld_dlopen" >&5
 $as_echo "$ac_cv_lib_svld_dlopen" >&6; }
-if test $ac_cv_lib_svld_dlopen = yes; then
+if test "x$ac_cv_lib_svld_dlopen" = x""yes; then :
   lt_cv_dlopen="dlopen" lt_cv_dlopen_libs="-lsvld"
 else
-  { $as_echo "$as_me:$LINENO: checking for dld_link in -ldld" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for dld_link in -ldld" >&5
 $as_echo_n "checking for dld_link in -ldld... " >&6; }
-if test "${ac_cv_lib_dld_dld_link+set}" = set; then
+if test "${ac_cv_lib_dld_dld_link+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-ldld  $LIBS"
-cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
@@ -10057,43 +9450,18 @@ return dld_link ();
   return 0;
 }
 _ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (ac_try="$ac_link"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_link") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest$ac_exeext && {
-	 test "$cross_compiling" = yes ||
-	 $as_test_x conftest$ac_exeext
-       }; then
+if ac_fn_c_try_link "$LINENO"; then :
   ac_cv_lib_dld_dld_link=yes
 else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-	ac_cv_lib_dld_dld_link=no
+  ac_cv_lib_dld_dld_link=no
 fi
-
-rm -rf conftest.dSYM
-rm -f core conftest.err conftest.$ac_objext conftest_ipa8_conftest.oo \
-      conftest$ac_exeext conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
-{ $as_echo "$as_me:$LINENO: result: $ac_cv_lib_dld_dld_link" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dld_dld_link" >&5
 $as_echo "$ac_cv_lib_dld_dld_link" >&6; }
-if test $ac_cv_lib_dld_dld_link = yes; then
+if test "x$ac_cv_lib_dld_dld_link" = x""yes; then :
   lt_cv_dlopen="dld_link" lt_cv_dlopen_libs="-ldld"
 fi
 
@@ -10132,9 +9500,9 @@ fi
     save_LIBS="$LIBS"
     LIBS="$lt_cv_dlopen_libs $LIBS"
 
-    { $as_echo "$as_me:$LINENO: checking whether a program can dlopen itself" >&5
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether a program can dlopen itself" >&5
 $as_echo_n "checking whether a program can dlopen itself... " >&6; }
-if test "${lt_cv_dlopen_self+set}" = set; then
+if test "${lt_cv_dlopen_self+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   	  if test "$cross_compiling" = yes; then :
@@ -10143,7 +9511,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10146 "configure"
+#line 9514 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -10202,11 +9570,11 @@ int main ()
   return status;
 }
 _LT_EOF
-  if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
   (eval $ac_link) 2>&5
   ac_status=$?
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && test -s conftest${ac_exeext} 2>/dev/null; then
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s conftest${ac_exeext} 2>/dev/null; then
     (./conftest; exit; ) >&5 2>/dev/null
     lt_status=$?
     case x$lt_status in
@@ -10223,14 +9591,14 @@ rm -fr conftest*
 
 
 fi
-{ $as_echo "$as_me:$LINENO: result: $lt_cv_dlopen_self" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_dlopen_self" >&5
 $as_echo "$lt_cv_dlopen_self" >&6; }
 
     if test "x$lt_cv_dlopen_self" = xyes; then
       wl=$lt_prog_compiler_wl eval LDFLAGS=\"\$LDFLAGS $lt_prog_compiler_static\"
-      { $as_echo "$as_me:$LINENO: checking whether a statically linked program can dlopen itself" >&5
+      { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether a statically linked program can dlopen itself" >&5
 $as_echo_n "checking whether a statically linked program can dlopen itself... " >&6; }
-if test "${lt_cv_dlopen_self_static+set}" = set; then
+if test "${lt_cv_dlopen_self_static+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   	  if test "$cross_compiling" = yes; then :
@@ -10239,7 +9607,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10242 "configure"
+#line 9610 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -10298,11 +9666,11 @@ int main ()
   return status;
 }
 _LT_EOF
-  if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
   (eval $ac_link) 2>&5
   ac_status=$?
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && test -s conftest${ac_exeext} 2>/dev/null; then
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s conftest${ac_exeext} 2>/dev/null; then
     (./conftest; exit; ) >&5 2>/dev/null
     lt_status=$?
     case x$lt_status in
@@ -10319,7 +9687,7 @@ rm -fr conftest*
 
 
 fi
-{ $as_echo "$as_me:$LINENO: result: $lt_cv_dlopen_self_static" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_dlopen_self_static" >&5
 $as_echo "$lt_cv_dlopen_self_static" >&6; }
     fi
 
@@ -10358,12 +9726,12 @@ fi
 
 striplib=
 old_striplib=
-{ $as_echo "$as_me:$LINENO: checking whether stripping libraries is possible" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether stripping libraries is possible" >&5
 $as_echo_n "checking whether stripping libraries is possible... " >&6; }
 if test -n "$STRIP" && $STRIP -V 2>&1 | $GREP "GNU strip" >/dev/null; then
   test -z "$old_striplib" && old_striplib="$STRIP --strip-debug"
   test -z "$striplib" && striplib="$STRIP --strip-unneeded"
-  { $as_echo "$as_me:$LINENO: result: yes" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 $as_echo "yes" >&6; }
 else
 # FIXME - insert some real tests, host_os isn't really good enough
@@ -10372,15 +9740,15 @@ else
     if test -n "$STRIP" ; then
       striplib="$STRIP -x"
       old_striplib="$STRIP -S"
-      { $as_echo "$as_me:$LINENO: result: yes" >&5
+      { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 $as_echo "yes" >&6; }
     else
-      { $as_echo "$as_me:$LINENO: result: no" >&5
+      { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
     fi
     ;;
   *)
-    { $as_echo "$as_me:$LINENO: result: no" >&5
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
     ;;
   esac
@@ -10398,12 +9766,12 @@ fi
 
 
   # Report which library types will actually be built
-  { $as_echo "$as_me:$LINENO: checking if libtool supports shared libraries" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking if libtool supports shared libraries" >&5
 $as_echo_n "checking if libtool supports shared libraries... " >&6; }
-  { $as_echo "$as_me:$LINENO: result: $can_build_shared" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $can_build_shared" >&5
 $as_echo "$can_build_shared" >&6; }
 
-  { $as_echo "$as_me:$LINENO: checking whether to build shared libraries" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to build shared libraries" >&5
 $as_echo_n "checking whether to build shared libraries... " >&6; }
   test "$can_build_shared" = "no" && enable_shared=no
 
@@ -10424,14 +9792,14 @@ $as_echo_n "checking whether to build shared libraries... " >&6; }
     fi
     ;;
   esac
-  { $as_echo "$as_me:$LINENO: result: $enable_shared" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $enable_shared" >&5
 $as_echo "$enable_shared" >&6; }
 
-  { $as_echo "$as_me:$LINENO: checking whether to build static libraries" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to build static libraries" >&5
 $as_echo_n "checking whether to build static libraries... " >&6; }
   # Make sure either enable_shared or enable_static is yes.
   test "$enable_shared" = yes || enable_static=yes
-  { $as_echo "$as_me:$LINENO: result: $enable_static" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $enable_static" >&5
 $as_echo "$enable_static" >&6; }
 
 
@@ -10480,10 +9848,10 @@ CC="$lt_save_CC"
 # OS/2's system install, which has a completely different semantic
 # ./install, which can be erroneously created by make from ./install.sh.
 # Reject install programs that cannot install multiple files.
-{ $as_echo "$as_me:$LINENO: checking for a BSD-compatible install" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for a BSD-compatible install" >&5
 $as_echo_n "checking for a BSD-compatible install... " >&6; }
 if test -z "$INSTALL"; then
-if test "${ac_cv_path_install+set}" = set; then
+if test "${ac_cv_path_install+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
@@ -10491,11 +9859,11 @@ for as_dir in $PATH
 do
   IFS=$as_save_IFS
   test -z "$as_dir" && as_dir=.
-  # Account for people who put trailing slashes in PATH elements.
-case $as_dir/ in
-  ./ | .// | /cC/* | \
+    # Account for people who put trailing slashes in PATH elements.
+case $as_dir/ in #((
+  ./ | .// | /[cC]/* | \
   /etc/* | /usr/sbin/* | /usr/etc/* | /sbin/* | /usr/afsws/bin/* | \
-  ?:\\/os2\\/install\\/* | ?:\\/OS2\\/INSTALL\\/* | \
+  ?:[\\/]os2[\\/]install[\\/]* | ?:[\\/]OS2[\\/]INSTALL[\\/]* | \
   /usr/ucb/* ) ;;
   *)
     # OSF1 and SCO ODT 3.0 have their own names for install.
@@ -10532,7 +9900,7 @@ case $as_dir/ in
     ;;
 esac
 
-done
+  done
 IFS=$as_save_IFS
 
 rm -rf conftest.one conftest.two conftest.dir
@@ -10548,7 +9916,7 @@ fi
     INSTALL=$ac_install_sh
   fi
 fi
-{ $as_echo "$as_me:$LINENO: result: $INSTALL" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $INSTALL" >&5
 $as_echo "$INSTALL" >&6; }
 
 # Use test -z because SunOS4 sh mishandles braces in ${var-val}.
@@ -10563,9 +9931,9 @@ for ac_prog in gawk mawk nawk awk
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
-{ $as_echo "$as_me:$LINENO: checking for $ac_word" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_AWK+set}" = set; then
+if test "${ac_cv_prog_AWK+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$AWK"; then
@@ -10576,24 +9944,24 @@ for as_dir in $PATH
 do
   IFS=$as_save_IFS
   test -z "$as_dir" && as_dir=.
-  for ac_exec_ext in '' $ac_executable_extensions; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
   if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
     ac_cv_prog_AWK="$ac_prog"
-    $as_echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
-done
+  done
 IFS=$as_save_IFS
 
 fi
 fi
 AWK=$ac_cv_prog_AWK
 if test -n "$AWK"; then
-  { $as_echo "$as_me:$LINENO: result: $AWK" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $AWK" >&5
 $as_echo "$AWK" >&6; }
 else
-  { $as_echo "$as_me:$LINENO: result: no" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi
 
@@ -10606,15 +9974,15 @@ done
 # Enable large file support (if special flags are necessary)
 #
 # Check whether --enable-largefile was given.
-if test "${enable_largefile+set}" = set; then
+if test "${enable_largefile+set}" = set; then :
   enableval=$enable_largefile;
 fi
 
 if test "$enable_largefile" != no; then
 
-  { $as_echo "$as_me:$LINENO: checking for special C compiler options needed for large files" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for special C compiler options needed for large files" >&5
 $as_echo_n "checking for special C compiler options needed for large files... " >&6; }
-if test "${ac_cv_sys_largefile_CC+set}" = set; then
+if test "${ac_cv_sys_largefile_CC+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_cv_sys_largefile_CC=no
@@ -10623,11 +9991,7 @@ else
        while :; do
 	 # IRIX 6.2 and later do not support large files by default,
 	 # so use the C compiler's -n32 option if that helps.
-	 cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
+	 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <sys/types.h>
  /* Check that off_t can represent 2**63 - 1 correctly.
@@ -10646,60 +10010,14 @@ main ()
   return 0;
 }
 _ACEOF
-	 rm -f conftest.$ac_objext
-if { (ac_try="$ac_compile"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_compile") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest.$ac_objext; then
+	 if ac_fn_c_try_compile "$LINENO"; then :
   break
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-
 fi
-
 rm -f core conftest.err conftest.$ac_objext
 	 CC="$CC -n32"
-	 rm -f conftest.$ac_objext
-if { (ac_try="$ac_compile"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_compile") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest.$ac_objext; then
+	 if ac_fn_c_try_compile "$LINENO"; then :
   ac_cv_sys_largefile_CC=' -n32'; break
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-
 fi
-
 rm -f core conftest.err conftest.$ac_objext
 	 break
        done
@@ -10707,23 +10025,19 @@ rm -f core conftest.err conftest.$ac_objext
        rm -f conftest.$ac_ext
     fi
 fi
-{ $as_echo "$as_me:$LINENO: result: $ac_cv_sys_largefile_CC" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sys_largefile_CC" >&5
 $as_echo "$ac_cv_sys_largefile_CC" >&6; }
   if test "$ac_cv_sys_largefile_CC" != no; then
     CC=$CC$ac_cv_sys_largefile_CC
   fi
 
-  { $as_echo "$as_me:$LINENO: checking for _FILE_OFFSET_BITS value needed for large files" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for _FILE_OFFSET_BITS value needed for large files" >&5
 $as_echo_n "checking for _FILE_OFFSET_BITS value needed for large files... " >&6; }
-if test "${ac_cv_sys_file_offset_bits+set}" = set; then
+if test "${ac_cv_sys_file_offset_bits+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   while :; do
-  cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <sys/types.h>
  /* Check that off_t can represent 2**63 - 1 correctly.
@@ -10742,38 +10056,11 @@ main ()
   return 0;
 }
 _ACEOF
-rm -f conftest.$ac_objext
-if { (ac_try="$ac_compile"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_compile") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest.$ac_objext; then
+if ac_fn_c_try_compile "$LINENO"; then :
   ac_cv_sys_file_offset_bits=no; break
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-
 fi
-
 rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-  cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #define _FILE_OFFSET_BITS 64
 #include <sys/types.h>
@@ -10793,38 +10080,15 @@ main ()
   return 0;
 }
 _ACEOF
-rm -f conftest.$ac_objext
-if { (ac_try="$ac_compile"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_compile") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest.$ac_objext; then
+if ac_fn_c_try_compile "$LINENO"; then :
   ac_cv_sys_file_offset_bits=64; break
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-
 fi
-
 rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
   ac_cv_sys_file_offset_bits=unknown
   break
 done
 fi
-{ $as_echo "$as_me:$LINENO: result: $ac_cv_sys_file_offset_bits" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sys_file_offset_bits" >&5
 $as_echo "$ac_cv_sys_file_offset_bits" >&6; }
 case $ac_cv_sys_file_offset_bits in #(
   no | unknown) ;;
@@ -10836,17 +10100,13 @@ _ACEOF
 esac
 rm -rf conftest*
   if test $ac_cv_sys_file_offset_bits = unknown; then
-    { $as_echo "$as_me:$LINENO: checking for _LARGE_FILES value needed for large files" >&5
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for _LARGE_FILES value needed for large files" >&5
 $as_echo_n "checking for _LARGE_FILES value needed for large files... " >&6; }
-if test "${ac_cv_sys_large_files+set}" = set; then
+if test "${ac_cv_sys_large_files+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   while :; do
-  cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <sys/types.h>
  /* Check that off_t can represent 2**63 - 1 correctly.
@@ -10865,38 +10125,11 @@ main ()
   return 0;
 }
 _ACEOF
-rm -f conftest.$ac_objext
-if { (ac_try="$ac_compile"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_compile") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest.$ac_objext; then
+if ac_fn_c_try_compile "$LINENO"; then :
   ac_cv_sys_large_files=no; break
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-
 fi
-
 rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-  cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #define _LARGE_FILES 1
 #include <sys/types.h>
@@ -10916,38 +10149,15 @@ main ()
   return 0;
 }
 _ACEOF
-rm -f conftest.$ac_objext
-if { (ac_try="$ac_compile"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_compile") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest.$ac_objext; then
+if ac_fn_c_try_compile "$LINENO"; then :
   ac_cv_sys_large_files=1; break
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-
 fi
-
 rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
   ac_cv_sys_large_files=unknown
   break
 done
 fi
-{ $as_echo "$as_me:$LINENO: result: $ac_cv_sys_large_files" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sys_large_files" >&5
 $as_echo "$ac_cv_sys_large_files" >&6; }
 case $ac_cv_sys_large_files in #(
   no | unknown) ;;
@@ -10964,101 +10174,8 @@ fi
 
 #########
 # Check for needed/wanted data types
-{ $as_echo "$as_me:$LINENO: checking for int8_t" >&5
-$as_echo_n "checking for int8_t... " >&6; }
-if test "${ac_cv_type_int8_t+set}" = set; then
-  $as_echo_n "(cached) " >&6
-else
-  ac_cv_type_int8_t=no
-cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-$ac_includes_default
-int
-main ()
-{
-if (sizeof (int8_t))
-       return 0;
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext
-if { (ac_try="$ac_compile"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_compile") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest.$ac_objext; then
-  cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-$ac_includes_default
-int
-main ()
-{
-if (sizeof ((int8_t)))
-	  return 0;
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext
-if { (ac_try="$ac_compile"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_compile") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest.$ac_objext; then
-  :
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-	ac_cv_type_int8_t=yes
-fi
-
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-
-fi
-
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-{ $as_echo "$as_me:$LINENO: result: $ac_cv_type_int8_t" >&5
-$as_echo "$ac_cv_type_int8_t" >&6; }
-if test $ac_cv_type_int8_t = yes; then
+ac_fn_c_check_type "$LINENO" "int8_t" "ac_cv_type_int8_t" "$ac_includes_default"
+if test "x$ac_cv_type_int8_t" = x""yes; then :
 
 cat >>confdefs.h <<_ACEOF
 #define HAVE_INT8_T 1
@@ -11066,101 +10183,8 @@ _ACEOF
 
 
 fi
-{ $as_echo "$as_me:$LINENO: checking for int16_t" >&5
-$as_echo_n "checking for int16_t... " >&6; }
-if test "${ac_cv_type_int16_t+set}" = set; then
-  $as_echo_n "(cached) " >&6
-else
-  ac_cv_type_int16_t=no
-cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-$ac_includes_default
-int
-main ()
-{
-if (sizeof (int16_t))
-       return 0;
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext
-if { (ac_try="$ac_compile"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_compile") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest.$ac_objext; then
-  cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-$ac_includes_default
-int
-main ()
-{
-if (sizeof ((int16_t)))
-	  return 0;
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext
-if { (ac_try="$ac_compile"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_compile") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest.$ac_objext; then
-  :
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-	ac_cv_type_int16_t=yes
-fi
-
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-
-fi
-
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-{ $as_echo "$as_me:$LINENO: result: $ac_cv_type_int16_t" >&5
-$as_echo "$ac_cv_type_int16_t" >&6; }
-if test $ac_cv_type_int16_t = yes; then
+ac_fn_c_check_type "$LINENO" "int16_t" "ac_cv_type_int16_t" "$ac_includes_default"
+if test "x$ac_cv_type_int16_t" = x""yes; then :
 
 cat >>confdefs.h <<_ACEOF
 #define HAVE_INT16_T 1
@@ -11168,101 +10192,8 @@ _ACEOF
 
 
 fi
-{ $as_echo "$as_me:$LINENO: checking for int32_t" >&5
-$as_echo_n "checking for int32_t... " >&6; }
-if test "${ac_cv_type_int32_t+set}" = set; then
-  $as_echo_n "(cached) " >&6
-else
-  ac_cv_type_int32_t=no
-cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-$ac_includes_default
-int
-main ()
-{
-if (sizeof (int32_t))
-       return 0;
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext
-if { (ac_try="$ac_compile"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_compile") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest.$ac_objext; then
-  cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-$ac_includes_default
-int
-main ()
-{
-if (sizeof ((int32_t)))
-	  return 0;
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext
-if { (ac_try="$ac_compile"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_compile") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest.$ac_objext; then
-  :
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-	ac_cv_type_int32_t=yes
-fi
-
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-
-fi
-
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-{ $as_echo "$as_me:$LINENO: result: $ac_cv_type_int32_t" >&5
-$as_echo "$ac_cv_type_int32_t" >&6; }
-if test $ac_cv_type_int32_t = yes; then
+ac_fn_c_check_type "$LINENO" "int32_t" "ac_cv_type_int32_t" "$ac_includes_default"
+if test "x$ac_cv_type_int32_t" = x""yes; then :
 
 cat >>confdefs.h <<_ACEOF
 #define HAVE_INT32_T 1
@@ -11270,101 +10201,8 @@ _ACEOF
 
 
 fi
-{ $as_echo "$as_me:$LINENO: checking for int64_t" >&5
-$as_echo_n "checking for int64_t... " >&6; }
-if test "${ac_cv_type_int64_t+set}" = set; then
-  $as_echo_n "(cached) " >&6
-else
-  ac_cv_type_int64_t=no
-cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-$ac_includes_default
-int
-main ()
-{
-if (sizeof (int64_t))
-       return 0;
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext
-if { (ac_try="$ac_compile"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_compile") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest.$ac_objext; then
-  cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-$ac_includes_default
-int
-main ()
-{
-if (sizeof ((int64_t)))
-	  return 0;
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext
-if { (ac_try="$ac_compile"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_compile") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest.$ac_objext; then
-  :
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-	ac_cv_type_int64_t=yes
-fi
-
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-
-fi
-
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-{ $as_echo "$as_me:$LINENO: result: $ac_cv_type_int64_t" >&5
-$as_echo "$ac_cv_type_int64_t" >&6; }
-if test $ac_cv_type_int64_t = yes; then
+ac_fn_c_check_type "$LINENO" "int64_t" "ac_cv_type_int64_t" "$ac_includes_default"
+if test "x$ac_cv_type_int64_t" = x""yes; then :
 
 cat >>confdefs.h <<_ACEOF
 #define HAVE_INT64_T 1
@@ -11372,101 +10210,8 @@ _ACEOF
 
 
 fi
-{ $as_echo "$as_me:$LINENO: checking for intptr_t" >&5
-$as_echo_n "checking for intptr_t... " >&6; }
-if test "${ac_cv_type_intptr_t+set}" = set; then
-  $as_echo_n "(cached) " >&6
-else
-  ac_cv_type_intptr_t=no
-cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-$ac_includes_default
-int
-main ()
-{
-if (sizeof (intptr_t))
-       return 0;
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext
-if { (ac_try="$ac_compile"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_compile") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest.$ac_objext; then
-  cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-$ac_includes_default
-int
-main ()
-{
-if (sizeof ((intptr_t)))
-	  return 0;
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext
-if { (ac_try="$ac_compile"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_compile") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest.$ac_objext; then
-  :
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-	ac_cv_type_intptr_t=yes
-fi
-
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-
-fi
-
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-{ $as_echo "$as_me:$LINENO: result: $ac_cv_type_intptr_t" >&5
-$as_echo "$ac_cv_type_intptr_t" >&6; }
-if test $ac_cv_type_intptr_t = yes; then
+ac_fn_c_check_type "$LINENO" "intptr_t" "ac_cv_type_intptr_t" "$ac_includes_default"
+if test "x$ac_cv_type_intptr_t" = x""yes; then :
 
 cat >>confdefs.h <<_ACEOF
 #define HAVE_INTPTR_T 1
@@ -11474,101 +10219,8 @@ _ACEOF
 
 
 fi
-{ $as_echo "$as_me:$LINENO: checking for uint8_t" >&5
-$as_echo_n "checking for uint8_t... " >&6; }
-if test "${ac_cv_type_uint8_t+set}" = set; then
-  $as_echo_n "(cached) " >&6
-else
-  ac_cv_type_uint8_t=no
-cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-$ac_includes_default
-int
-main ()
-{
-if (sizeof (uint8_t))
-       return 0;
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext
-if { (ac_try="$ac_compile"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_compile") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest.$ac_objext; then
-  cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-$ac_includes_default
-int
-main ()
-{
-if (sizeof ((uint8_t)))
-	  return 0;
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext
-if { (ac_try="$ac_compile"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_compile") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest.$ac_objext; then
-  :
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-	ac_cv_type_uint8_t=yes
-fi
-
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-
-fi
-
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-{ $as_echo "$as_me:$LINENO: result: $ac_cv_type_uint8_t" >&5
-$as_echo "$ac_cv_type_uint8_t" >&6; }
-if test $ac_cv_type_uint8_t = yes; then
+ac_fn_c_check_type "$LINENO" "uint8_t" "ac_cv_type_uint8_t" "$ac_includes_default"
+if test "x$ac_cv_type_uint8_t" = x""yes; then :
 
 cat >>confdefs.h <<_ACEOF
 #define HAVE_UINT8_T 1
@@ -11576,101 +10228,8 @@ _ACEOF
 
 
 fi
-{ $as_echo "$as_me:$LINENO: checking for uint16_t" >&5
-$as_echo_n "checking for uint16_t... " >&6; }
-if test "${ac_cv_type_uint16_t+set}" = set; then
-  $as_echo_n "(cached) " >&6
-else
-  ac_cv_type_uint16_t=no
-cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-$ac_includes_default
-int
-main ()
-{
-if (sizeof (uint16_t))
-       return 0;
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext
-if { (ac_try="$ac_compile"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_compile") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest.$ac_objext; then
-  cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-$ac_includes_default
-int
-main ()
-{
-if (sizeof ((uint16_t)))
-	  return 0;
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext
-if { (ac_try="$ac_compile"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_compile") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest.$ac_objext; then
-  :
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-	ac_cv_type_uint16_t=yes
-fi
-
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-
-fi
-
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-{ $as_echo "$as_me:$LINENO: result: $ac_cv_type_uint16_t" >&5
-$as_echo "$ac_cv_type_uint16_t" >&6; }
-if test $ac_cv_type_uint16_t = yes; then
+ac_fn_c_check_type "$LINENO" "uint16_t" "ac_cv_type_uint16_t" "$ac_includes_default"
+if test "x$ac_cv_type_uint16_t" = x""yes; then :
 
 cat >>confdefs.h <<_ACEOF
 #define HAVE_UINT16_T 1
@@ -11678,101 +10237,8 @@ _ACEOF
 
 
 fi
-{ $as_echo "$as_me:$LINENO: checking for uint32_t" >&5
-$as_echo_n "checking for uint32_t... " >&6; }
-if test "${ac_cv_type_uint32_t+set}" = set; then
-  $as_echo_n "(cached) " >&6
-else
-  ac_cv_type_uint32_t=no
-cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-$ac_includes_default
-int
-main ()
-{
-if (sizeof (uint32_t))
-       return 0;
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext
-if { (ac_try="$ac_compile"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_compile") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest.$ac_objext; then
-  cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-$ac_includes_default
-int
-main ()
-{
-if (sizeof ((uint32_t)))
-	  return 0;
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext
-if { (ac_try="$ac_compile"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_compile") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest.$ac_objext; then
-  :
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-	ac_cv_type_uint32_t=yes
-fi
-
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-
-fi
-
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-{ $as_echo "$as_me:$LINENO: result: $ac_cv_type_uint32_t" >&5
-$as_echo "$ac_cv_type_uint32_t" >&6; }
-if test $ac_cv_type_uint32_t = yes; then
+ac_fn_c_check_type "$LINENO" "uint32_t" "ac_cv_type_uint32_t" "$ac_includes_default"
+if test "x$ac_cv_type_uint32_t" = x""yes; then :
 
 cat >>confdefs.h <<_ACEOF
 #define HAVE_UINT32_T 1
@@ -11780,101 +10246,8 @@ _ACEOF
 
 
 fi
-{ $as_echo "$as_me:$LINENO: checking for uint64_t" >&5
-$as_echo_n "checking for uint64_t... " >&6; }
-if test "${ac_cv_type_uint64_t+set}" = set; then
-  $as_echo_n "(cached) " >&6
-else
-  ac_cv_type_uint64_t=no
-cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-$ac_includes_default
-int
-main ()
-{
-if (sizeof (uint64_t))
-       return 0;
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext
-if { (ac_try="$ac_compile"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_compile") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest.$ac_objext; then
-  cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-$ac_includes_default
-int
-main ()
-{
-if (sizeof ((uint64_t)))
-	  return 0;
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext
-if { (ac_try="$ac_compile"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_compile") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest.$ac_objext; then
-  :
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-	ac_cv_type_uint64_t=yes
-fi
-
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-
-fi
-
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-{ $as_echo "$as_me:$LINENO: result: $ac_cv_type_uint64_t" >&5
-$as_echo "$ac_cv_type_uint64_t" >&6; }
-if test $ac_cv_type_uint64_t = yes; then
+ac_fn_c_check_type "$LINENO" "uint64_t" "ac_cv_type_uint64_t" "$ac_includes_default"
+if test "x$ac_cv_type_uint64_t" = x""yes; then :
 
 cat >>confdefs.h <<_ACEOF
 #define HAVE_UINT64_T 1
@@ -11882,101 +10255,8 @@ _ACEOF
 
 
 fi
-{ $as_echo "$as_me:$LINENO: checking for uintptr_t" >&5
-$as_echo_n "checking for uintptr_t... " >&6; }
-if test "${ac_cv_type_uintptr_t+set}" = set; then
-  $as_echo_n "(cached) " >&6
-else
-  ac_cv_type_uintptr_t=no
-cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-$ac_includes_default
-int
-main ()
-{
-if (sizeof (uintptr_t))
-       return 0;
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext
-if { (ac_try="$ac_compile"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_compile") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest.$ac_objext; then
-  cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-$ac_includes_default
-int
-main ()
-{
-if (sizeof ((uintptr_t)))
-	  return 0;
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext
-if { (ac_try="$ac_compile"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_compile") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest.$ac_objext; then
-  :
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-	ac_cv_type_uintptr_t=yes
-fi
-
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-
-fi
-
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-{ $as_echo "$as_me:$LINENO: result: $ac_cv_type_uintptr_t" >&5
-$as_echo "$ac_cv_type_uintptr_t" >&6; }
-if test $ac_cv_type_uintptr_t = yes; then
+ac_fn_c_check_type "$LINENO" "uintptr_t" "ac_cv_type_uintptr_t" "$ac_includes_default"
+if test "x$ac_cv_type_uintptr_t" = x""yes; then :
 
 cat >>confdefs.h <<_ACEOF
 #define HAVE_UINTPTR_T 1
@@ -11988,146 +10268,11 @@ fi
 
 #########
 # Check for needed/wanted headers
-
-
-
-
 for ac_header in sys/types.h stdlib.h stdint.h inttypes.h
-do
-as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
-if { as_var=$as_ac_Header; eval "test \"\${$as_var+set}\" = set"; }; then
-  { $as_echo "$as_me:$LINENO: checking for $ac_header" >&5
-$as_echo_n "checking for $ac_header... " >&6; }
-if { as_var=$as_ac_Header; eval "test \"\${$as_var+set}\" = set"; }; then
-  $as_echo_n "(cached) " >&6
-fi
-ac_res=`eval 'as_val=${'$as_ac_Header'}
-		 $as_echo "$as_val"'`
-	       { $as_echo "$as_me:$LINENO: result: $ac_res" >&5
-$as_echo "$ac_res" >&6; }
-else
-  # Is the header compilable?
-{ $as_echo "$as_me:$LINENO: checking $ac_header usability" >&5
-$as_echo_n "checking $ac_header usability... " >&6; }
-cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-$ac_includes_default
-#include <$ac_header>
-_ACEOF
-rm -f conftest.$ac_objext
-if { (ac_try="$ac_compile"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_compile") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest.$ac_objext; then
-  ac_header_compiler=yes
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-	ac_header_compiler=no
-fi
-
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-{ $as_echo "$as_me:$LINENO: result: $ac_header_compiler" >&5
-$as_echo "$ac_header_compiler" >&6; }
-
-# Is the header present?
-{ $as_echo "$as_me:$LINENO: checking $ac_header presence" >&5
-$as_echo_n "checking $ac_header presence... " >&6; }
-cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-#include <$ac_header>
-_ACEOF
-if { (ac_try="$ac_cpp conftest.$ac_ext"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_cpp conftest.$ac_ext") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } >/dev/null && {
-	 test -z "$ac_c_preproc_warn_flag$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       }; then
-  ac_header_preproc=yes
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-  ac_header_preproc=no
-fi
-
-rm -f conftest.err conftest.$ac_ext
-{ $as_echo "$as_me:$LINENO: result: $ac_header_preproc" >&5
-$as_echo "$ac_header_preproc" >&6; }
-
-# So?  What about this header?
-case $ac_header_compiler:$ac_header_preproc:$ac_c_preproc_warn_flag in
-  yes:no: )
-    { $as_echo "$as_me:$LINENO: WARNING: $ac_header: accepted by the compiler, rejected by the preprocessor!" >&5
-$as_echo "$as_me: WARNING: $ac_header: accepted by the compiler, rejected by the preprocessor!" >&2;}
-    { $as_echo "$as_me:$LINENO: WARNING: $ac_header: proceeding with the compiler's result" >&5
-$as_echo "$as_me: WARNING: $ac_header: proceeding with the compiler's result" >&2;}
-    ac_header_preproc=yes
-    ;;
-  no:yes:* )
-    { $as_echo "$as_me:$LINENO: WARNING: $ac_header: present but cannot be compiled" >&5
-$as_echo "$as_me: WARNING: $ac_header: present but cannot be compiled" >&2;}
-    { $as_echo "$as_me:$LINENO: WARNING: $ac_header:     check for missing prerequisite headers?" >&5
-$as_echo "$as_me: WARNING: $ac_header:     check for missing prerequisite headers?" >&2;}
-    { $as_echo "$as_me:$LINENO: WARNING: $ac_header: see the Autoconf documentation" >&5
-$as_echo "$as_me: WARNING: $ac_header: see the Autoconf documentation" >&2;}
-    { $as_echo "$as_me:$LINENO: WARNING: $ac_header:     section \"Present But Cannot Be Compiled\"" >&5
-$as_echo "$as_me: WARNING: $ac_header:     section \"Present But Cannot Be Compiled\"" >&2;}
-    { $as_echo "$as_me:$LINENO: WARNING: $ac_header: proceeding with the preprocessor's result" >&5
-$as_echo "$as_me: WARNING: $ac_header: proceeding with the preprocessor's result" >&2;}
-    { $as_echo "$as_me:$LINENO: WARNING: $ac_header: in the future, the compiler will take precedence" >&5
-$as_echo "$as_me: WARNING: $ac_header: in the future, the compiler will take precedence" >&2;}
-
-    ;;
-esac
-{ $as_echo "$as_me:$LINENO: checking for $ac_header" >&5
-$as_echo_n "checking for $ac_header... " >&6; }
-if { as_var=$as_ac_Header; eval "test \"\${$as_var+set}\" = set"; }; then
-  $as_echo_n "(cached) " >&6
-else
-  eval "$as_ac_Header=\$ac_header_preproc"
-fi
-ac_res=`eval 'as_val=${'$as_ac_Header'}
-		 $as_echo "$as_val"'`
-	       { $as_echo "$as_me:$LINENO: result: $ac_res" >&5
-$as_echo "$ac_res" >&6; }
-
-fi
-if test `eval 'as_val=${'$as_ac_Header'}
-		 $as_echo "$as_val"'` = yes; then
+do :
+  as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
+ac_fn_c_check_header_mongrel "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default"
+if eval test \"x\$"$as_ac_Header"\" = x"yes"; then :
   cat >>confdefs.h <<_ACEOF
 #define `$as_echo "HAVE_$ac_header" | $as_tr_cpp` 1
 _ACEOF
@@ -12140,104 +10285,11 @@ done
 #########
 # Figure out whether or not we have these functions
 #
-
-
-
-
-
-
 for ac_func in usleep fdatasync localtime_r gmtime_r localtime_s utime
-do
-as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
-{ $as_echo "$as_me:$LINENO: checking for $ac_func" >&5
-$as_echo_n "checking for $ac_func... " >&6; }
-if { as_var=$as_ac_var; eval "test \"\${$as_var+set}\" = set"; }; then
-  $as_echo_n "(cached) " >&6
-else
-  cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-/* Define $ac_func to an innocuous variant, in case <limits.h> declares $ac_func.
-   For example, HP-UX 11i <limits.h> declares gettimeofday.  */
-#define $ac_func innocuous_$ac_func
-
-/* System header to define __stub macros and hopefully few prototypes,
-    which can conflict with char $ac_func (); below.
-    Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
-    <limits.h> exists even on freestanding compilers.  */
-
-#ifdef __STDC__
-# include <limits.h>
-#else
-# include <assert.h>
-#endif
-
-#undef $ac_func
-
-/* Override any GCC internal prototype to avoid an error.
-   Use char because int might match the return type of a GCC
-   builtin and then its argument prototype would still apply.  */
-#ifdef __cplusplus
-extern "C"
-#endif
-char $ac_func ();
-/* The GNU C library defines this for functions which it implements
-    to always fail with ENOSYS.  Some functions are actually named
-    something starting with __ and the normal name is an alias.  */
-#if defined __stub_$ac_func || defined __stub___$ac_func
-choke me
-#endif
-
-int
-main ()
-{
-return $ac_func ();
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (ac_try="$ac_link"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_link") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest$ac_exeext && {
-	 test "$cross_compiling" = yes ||
-	 $as_test_x conftest$ac_exeext
-       }; then
-  eval "$as_ac_var=yes"
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-	eval "$as_ac_var=no"
-fi
-
-rm -rf conftest.dSYM
-rm -f core conftest.err conftest.$ac_objext conftest_ipa8_conftest.oo \
-      conftest$ac_exeext conftest.$ac_ext
-fi
-ac_res=`eval 'as_val=${'$as_ac_var'}
-		 $as_echo "$as_val"'`
-	       { $as_echo "$as_me:$LINENO: result: $ac_res" >&5
-$as_echo "$ac_res" >&6; }
-if test `eval 'as_val=${'$as_ac_var'}
-		 $as_echo "$as_val"'` = yes; then
+do :
+  as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
+ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
+if eval test \"x\$"$as_ac_var"\" = x"yes"; then :
   cat >>confdefs.h <<_ACEOF
 #define `$as_echo "HAVE_$ac_func" | $as_tr_cpp` 1
 _ACEOF
@@ -12260,9 +10312,9 @@ for ac_prog in tclsh8.5 tclsh
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
-{ $as_echo "$as_me:$LINENO: checking for $ac_word" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_TCLSH_CMD+set}" = set; then
+if test "${ac_cv_prog_TCLSH_CMD+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$TCLSH_CMD"; then
@@ -12273,24 +10325,24 @@ for as_dir in $PATH
 do
   IFS=$as_save_IFS
   test -z "$as_dir" && as_dir=.
-  for ac_exec_ext in '' $ac_executable_extensions; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
   if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
     ac_cv_prog_TCLSH_CMD="$ac_prog"
-    $as_echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
-done
+  done
 IFS=$as_save_IFS
 
 fi
 fi
 TCLSH_CMD=$ac_cv_prog_TCLSH_CMD
 if test -n "$TCLSH_CMD"; then
-  { $as_echo "$as_me:$LINENO: result: $TCLSH_CMD" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $TCLSH_CMD" >&5
 $as_echo "$TCLSH_CMD" >&6; }
 else
-  { $as_echo "$as_me:$LINENO: result: no" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi
 
@@ -12328,17 +10380,17 @@ fi
 
 
 VERSION=`cat $srcdir/VERSION | sed 's/^\([0-9]*\.*[0-9]*\).*/\1/'`
-{ $as_echo "$as_me:$LINENO: Version set to $VERSION" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: Version set to $VERSION" >&5
 $as_echo "$as_me: Version set to $VERSION" >&6;}
 
 RELEASE=`cat $srcdir/VERSION`
-{ $as_echo "$as_me:$LINENO: Release set to $RELEASE" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: Release set to $RELEASE" >&5
 $as_echo "$as_me: Release set to $RELEASE" >&6;}
 
 VERSION_NUMBER=`cat $srcdir/VERSION \
                            | sed 's/[^0-9]/ /g' \
                 | awk '{printf "%d%03d%03d",$1,$2,$3}'`
-{ $as_echo "$as_me:$LINENO: Version number set to $VERSION_NUMBER" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: Version number set to $VERSION_NUMBER" >&5
 $as_echo "$as_me: Version number set to $VERSION_NUMBER" >&6;}
 
 
@@ -12351,7 +10403,7 @@ $as_echo "$as_me: Version number set to $VERSION_NUMBER" >&6;}
 #
 
 # Check whether --with-hints was given.
-if test "${with_hints+set}" = set; then
+if test "${with_hints+set}" = set; then :
   withval=$with_hints; hints=$withval
 fi
 
@@ -12376,7 +10428,7 @@ if test "$hints" = ""; then
   fi
 fi
 if test "$hints" != ""; then
-  { $as_echo "$as_me:$LINENO: result: reading hints from $hints" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: reading hints from $hints" >&5
 $as_echo "reading hints from $hints" >&6; }
   . $hints
 fi
@@ -12394,9 +10446,9 @@ else
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
-{ $as_echo "$as_me:$LINENO: checking for $ac_word" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_BUILD_CC+set}" = set; then
+if test "${ac_cv_prog_BUILD_CC+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$BUILD_CC"; then
@@ -12407,24 +10459,24 @@ for as_dir in $PATH
 do
   IFS=$as_save_IFS
   test -z "$as_dir" && as_dir=.
-  for ac_exec_ext in '' $ac_executable_extensions; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
   if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
     ac_cv_prog_BUILD_CC="$ac_prog"
-    $as_echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
-done
+  done
 IFS=$as_save_IFS
 
 fi
 fi
 BUILD_CC=$ac_cv_prog_BUILD_CC
 if test -n "$BUILD_CC"; then
-  { $as_echo "$as_me:$LINENO: result: $BUILD_CC" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $BUILD_CC" >&5
 $as_echo "$BUILD_CC" >&6; }
 else
-  { $as_echo "$as_me:$LINENO: result: no" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi
 
@@ -12443,37 +10495,33 @@ fi
 # Do we want to support multithreaded use of sqlite
 #
 # Check whether --enable-threadsafe was given.
-if test "${enable_threadsafe+set}" = set; then
+if test "${enable_threadsafe+set}" = set; then :
   enableval=$enable_threadsafe;
 else
   enable_threadsafe=yes
 fi
 
-{ $as_echo "$as_me:$LINENO: checking whether to support threadsafe operation" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to support threadsafe operation" >&5
 $as_echo_n "checking whether to support threadsafe operation... " >&6; }
 if test "$enable_threadsafe" = "no"; then
   SQLITE_THREADSAFE=0
-  { $as_echo "$as_me:$LINENO: result: no" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 else
   SQLITE_THREADSAFE=1
-  { $as_echo "$as_me:$LINENO: result: yes" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 $as_echo "yes" >&6; }
 fi
 
 
 if test "$SQLITE_THREADSAFE" = "1"; then
-  { $as_echo "$as_me:$LINENO: checking for library containing pthread_create" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing pthread_create" >&5
 $as_echo_n "checking for library containing pthread_create... " >&6; }
-if test "${ac_cv_search_pthread_create+set}" = set; then
+if test "${ac_cv_search_pthread_create+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_func_search_save_LIBS=$LIBS
-cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
@@ -12498,54 +10546,27 @@ for ac_lib in '' pthread; do
     ac_res=-l$ac_lib
     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
   fi
-  rm -f conftest.$ac_objext conftest$ac_exeext
-if { (ac_try="$ac_link"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_link") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest$ac_exeext && {
-	 test "$cross_compiling" = yes ||
-	 $as_test_x conftest$ac_exeext
-       }; then
+  if ac_fn_c_try_link "$LINENO"; then :
   ac_cv_search_pthread_create=$ac_res
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-
 fi
-
-rm -rf conftest.dSYM
-rm -f core conftest.err conftest.$ac_objext conftest_ipa8_conftest.oo \
-      conftest$ac_exeext
-  if test "${ac_cv_search_pthread_create+set}" = set; then
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext
+  if test "${ac_cv_search_pthread_create+set}" = set; then :
   break
 fi
 done
-if test "${ac_cv_search_pthread_create+set}" = set; then
-  :
+if test "${ac_cv_search_pthread_create+set}" = set; then :
+
 else
   ac_cv_search_pthread_create=no
 fi
 rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS
 fi
-{ $as_echo "$as_me:$LINENO: result: $ac_cv_search_pthread_create" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_pthread_create" >&5
 $as_echo "$ac_cv_search_pthread_create" >&6; }
 ac_res=$ac_cv_search_pthread_create
-if test "$ac_res" != no; then
+if test "$ac_res" != no; then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
 
 fi
@@ -12558,21 +10579,21 @@ fi
 # due to bugs in the threading implementations.  This is thus off by default.
 #
 # Check whether --enable-cross-thread-connections was given.
-if test "${enable_cross_thread_connections+set}" = set; then
+if test "${enable_cross_thread_connections+set}" = set; then :
   enableval=$enable_cross_thread_connections;
 else
   enable_xthreadconnect=no
 fi
 
-{ $as_echo "$as_me:$LINENO: checking whether to allow connections to be shared across threads" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to allow connections to be shared across threads" >&5
 $as_echo_n "checking whether to allow connections to be shared across threads... " >&6; }
 if test "$enable_xthreadconnect" = "no"; then
   XTHREADCONNECT=''
-  { $as_echo "$as_me:$LINENO: result: no" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 else
   XTHREADCONNECT='-DSQLITE_ALLOW_XTHREAD_CONNECT=1'
-  { $as_echo "$as_me:$LINENO: result: yes" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 $as_echo "yes" >&6; }
 fi
 
@@ -12581,21 +10602,21 @@ fi
 # Do we want to support release
 #
 # Check whether --enable-releasemode was given.
-if test "${enable_releasemode+set}" = set; then
+if test "${enable_releasemode+set}" = set; then :
   enableval=$enable_releasemode;
 else
   enable_releasemode=no
 fi
 
-{ $as_echo "$as_me:$LINENO: checking whether to support shared library linked as release mode or not" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to support shared library linked as release mode or not" >&5
 $as_echo_n "checking whether to support shared library linked as release mode or not... " >&6; }
 if test "$enable_releasemode" = "no"; then
   ALLOWRELEASE=""
-  { $as_echo "$as_me:$LINENO: result: no" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 else
   ALLOWRELEASE="-release `cat $srcdir/VERSION`"
-  { $as_echo "$as_me:$LINENO: result: yes" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 $as_echo "yes" >&6; }
 fi
 
@@ -12604,38 +10625,38 @@ fi
 # Do we want temporary databases in memory
 #
 # Check whether --enable-tempstore was given.
-if test "${enable_tempstore+set}" = set; then
+if test "${enable_tempstore+set}" = set; then :
   enableval=$enable_tempstore;
 else
   enable_tempstore=no
 fi
 
-{ $as_echo "$as_me:$LINENO: checking whether to use an in-ram database for temporary tables" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to use an in-ram database for temporary tables" >&5
 $as_echo_n "checking whether to use an in-ram database for temporary tables... " >&6; }
 case "$enable_tempstore" in
   never )
     TEMP_STORE=0
-    { $as_echo "$as_me:$LINENO: result: never" >&5
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: never" >&5
 $as_echo "never" >&6; }
   ;;
   no )
     TEMP_STORE=1
-    { $as_echo "$as_me:$LINENO: result: no" >&5
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
   ;;
   yes )
      TEMP_STORE=2
-    { $as_echo "$as_me:$LINENO: result: yes" >&5
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 $as_echo "yes" >&6; }
   ;;
   always )
      TEMP_STORE=3
-    { $as_echo "$as_me:$LINENO: result: always" >&5
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: always" >&5
 $as_echo "always" >&6; }
   ;;
   * )
     TEMP_STORE=1
-    { $as_echo "$as_me:$LINENO: result: no" >&5
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
   ;;
 esac
@@ -12647,53 +10668,17 @@ esac
 # the CYGWIN environment.  So check for that special case and handle
 # things accordingly.
 #
-{ $as_echo "$as_me:$LINENO: checking if executables have the .exe suffix" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if executables have the .exe suffix" >&5
 $as_echo_n "checking if executables have the .exe suffix... " >&6; }
 if test "$config_BUILD_EXEEXT" = ".exe"; then
   CYGWIN=yes
-  { $as_echo "$as_me:$LINENO: result: yes" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 $as_echo "yes" >&6; }
 else
-  { $as_echo "$as_me:$LINENO: result: unknown" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: unknown" >&5
 $as_echo "unknown" >&6; }
 fi
 if test "$CYGWIN" != "yes"; then
-  { $as_echo "$as_me:$LINENO: checking host system type" >&5
-$as_echo_n "checking host system type... " >&6; }
-if test "${ac_cv_host+set}" = set; then
-  $as_echo_n "(cached) " >&6
-else
-  if test "x$host_alias" = x; then
-  ac_cv_host=$ac_cv_build
-else
-  ac_cv_host=`$SHELL "$ac_aux_dir/config.sub" $host_alias` ||
-    { { $as_echo "$as_me:$LINENO: error: $SHELL $ac_aux_dir/config.sub $host_alias failed" >&5
-$as_echo "$as_me: error: $SHELL $ac_aux_dir/config.sub $host_alias failed" >&2;}
-   { (exit 1); exit 1; }; }
-fi
-
-fi
-{ $as_echo "$as_me:$LINENO: result: $ac_cv_host" >&5
-$as_echo "$ac_cv_host" >&6; }
-case $ac_cv_host in
-*-*-*) ;;
-*) { { $as_echo "$as_me:$LINENO: error: invalid value of canonical host" >&5
-$as_echo "$as_me: error: invalid value of canonical host" >&2;}
-   { (exit 1); exit 1; }; };;
-esac
-host=$ac_cv_host
-ac_save_IFS=$IFS; IFS='-'
-set x $ac_cv_host
-shift
-host_cpu=$1
-host_vendor=$2
-shift; shift
-# Remember, the first character of IFS is used to create $*,
-# except with old shells:
-host_os=$*
-IFS=$ac_save_IFS
-case $host_os in *\ *) host_os=`echo "$host_os" | sed 's/ /-/g'`;; esac
-
 
 case $host_os in
   *cygwin* ) CYGWIN=yes;;
@@ -12745,7 +10730,7 @@ fi
 # minor changes to accomodate systems that do not have TCL installed.
 #
 # Check whether --enable-tcl was given.
-if test "${enable_tcl+set}" = set; then
+if test "${enable_tcl+set}" = set; then :
   enableval=$enable_tcl; use_tcl=$enableval
 else
   use_tcl=yes
@@ -12754,13 +10739,13 @@ fi
 if test "${use_tcl}" = "yes" ; then
 
 # Check whether --with-tcl was given.
-if test "${with_tcl+set}" = set; then
+if test "${with_tcl+set}" = set; then :
   withval=$with_tcl; with_tclconfig=${withval}
 fi
 
-  { $as_echo "$as_me:$LINENO: checking for Tcl configuration" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for Tcl configuration" >&5
 $as_echo_n "checking for Tcl configuration... " >&6; }
-  if test "${ac_cv_c_tclconfig+set}" = set; then
+  if test "${ac_cv_c_tclconfig+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
 
@@ -12769,9 +10754,7 @@ else
       if test -f "${with_tclconfig}/tclConfig.sh" ; then
         ac_cv_c_tclconfig=`(cd ${with_tclconfig}; pwd)`
       else
-        { { $as_echo "$as_me:$LINENO: error: ${with_tclconfig} directory doesn't contain tclConfig.sh" >&5
-$as_echo "$as_me: error: ${with_tclconfig} directory doesn't contain tclConfig.sh" >&2;}
-   { (exit 1); exit 1; }; }
+        as_fn_error $? "${with_tclconfig} directory doesn't contain tclConfig.sh" "$LINENO" 5
       fi
     fi
 
@@ -12844,25 +10827,25 @@ fi
 
   if test x"${ac_cv_c_tclconfig}" = x ; then
     use_tcl=no
-    { $as_echo "$as_me:$LINENO: WARNING: Can't find Tcl configuration definitions" >&5
+    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Can't find Tcl configuration definitions" >&5
 $as_echo "$as_me: WARNING: Can't find Tcl configuration definitions" >&2;}
-    { $as_echo "$as_me:$LINENO: WARNING: *** Without Tcl the regression tests cannot be executed ***" >&5
+    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: *** Without Tcl the regression tests cannot be executed ***" >&5
 $as_echo "$as_me: WARNING: *** Without Tcl the regression tests cannot be executed ***" >&2;}
-    { $as_echo "$as_me:$LINENO: WARNING: *** Consider using --with-tcl=... to define location of Tcl ***" >&5
+    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: *** Consider using --with-tcl=... to define location of Tcl ***" >&5
 $as_echo "$as_me: WARNING: *** Consider using --with-tcl=... to define location of Tcl ***" >&2;}
   else
     TCL_BIN_DIR=${ac_cv_c_tclconfig}
-    { $as_echo "$as_me:$LINENO: result: found $TCL_BIN_DIR/tclConfig.sh" >&5
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: found $TCL_BIN_DIR/tclConfig.sh" >&5
 $as_echo "found $TCL_BIN_DIR/tclConfig.sh" >&6; }
 
-    { $as_echo "$as_me:$LINENO: checking for existence of $TCL_BIN_DIR/tclConfig.sh" >&5
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for existence of $TCL_BIN_DIR/tclConfig.sh" >&5
 $as_echo_n "checking for existence of $TCL_BIN_DIR/tclConfig.sh... " >&6; }
     if test -f "$TCL_BIN_DIR/tclConfig.sh" ; then
-      { $as_echo "$as_me:$LINENO: result: loading" >&5
+      { $as_echo "$as_me:${as_lineno-$LINENO}: result: loading" >&5
 $as_echo "loading" >&6; }
       . $TCL_BIN_DIR/tclConfig.sh
     else
-      { $as_echo "$as_me:$LINENO: result: file not found" >&5
+      { $as_echo "$as_me:${as_lineno-$LINENO}: result: file not found" >&5
 $as_echo "file not found" >&6; }
     fi
 
@@ -12923,7 +10906,7 @@ TARGET_READLINE_LIBS=""
 TARGET_READLINE_INC=""
 TARGET_HAVE_READLINE=0
 # Check whether --enable-readline was given.
-if test "${enable_readline+set}" = set; then
+if test "${enable_readline+set}" = set; then :
   enableval=$enable_readline; with_readline=$enableval
 else
   with_readline=auto
@@ -12935,7 +10918,7 @@ if test x"$with_readline" != xno; then
 
 
 # Check whether --with-readline-lib was given.
-if test "${with_readline_lib+set}" = set; then
+if test "${with_readline_lib+set}" = set; then :
   withval=$with_readline_lib; with_readline_lib=$withval
 else
   with_readline_lib="auto"
@@ -12944,17 +10927,13 @@ fi
 	if test "x$with_readline_lib" = xauto; then
 		save_LIBS="$LIBS"
 		LIBS=""
-		{ $as_echo "$as_me:$LINENO: checking for library containing tgetent" >&5
+		{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing tgetent" >&5
 $as_echo_n "checking for library containing tgetent... " >&6; }
-if test "${ac_cv_search_tgetent+set}" = set; then
+if test "${ac_cv_search_tgetent+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_func_search_save_LIBS=$LIBS
-cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
@@ -12979,72 +10958,41 @@ for ac_lib in '' readline ncurses curses termcap; do
     ac_res=-l$ac_lib
     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
   fi
-  rm -f conftest.$ac_objext conftest$ac_exeext
-if { (ac_try="$ac_link"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_link") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest$ac_exeext && {
-	 test "$cross_compiling" = yes ||
-	 $as_test_x conftest$ac_exeext
-       }; then
+  if ac_fn_c_try_link "$LINENO"; then :
   ac_cv_search_tgetent=$ac_res
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-
 fi
-
-rm -rf conftest.dSYM
-rm -f core conftest.err conftest.$ac_objext conftest_ipa8_conftest.oo \
-      conftest$ac_exeext
-  if test "${ac_cv_search_tgetent+set}" = set; then
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext
+  if test "${ac_cv_search_tgetent+set}" = set; then :
   break
 fi
 done
-if test "${ac_cv_search_tgetent+set}" = set; then
-  :
+if test "${ac_cv_search_tgetent+set}" = set; then :
+
 else
   ac_cv_search_tgetent=no
 fi
 rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS
 fi
-{ $as_echo "$as_me:$LINENO: result: $ac_cv_search_tgetent" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_tgetent" >&5
 $as_echo "$ac_cv_search_tgetent" >&6; }
 ac_res=$ac_cv_search_tgetent
-if test "$ac_res" != no; then
+if test "$ac_res" != no; then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
   term_LIBS="$LIBS"
 else
   term_LIBS=""
 fi
 
-		{ $as_echo "$as_me:$LINENO: checking for readline in -lreadline" >&5
+		{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for readline in -lreadline" >&5
 $as_echo_n "checking for readline in -lreadline... " >&6; }
-if test "${ac_cv_lib_readline_readline+set}" = set; then
+if test "${ac_cv_lib_readline_readline+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-lreadline  $LIBS"
-cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
@@ -13062,43 +11010,18 @@ return readline ();
   return 0;
 }
 _ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (ac_try="$ac_link"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_link") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest$ac_exeext && {
-	 test "$cross_compiling" = yes ||
-	 $as_test_x conftest$ac_exeext
-       }; then
+if ac_fn_c_try_link "$LINENO"; then :
   ac_cv_lib_readline_readline=yes
 else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-	ac_cv_lib_readline_readline=no
+  ac_cv_lib_readline_readline=no
 fi
-
-rm -rf conftest.dSYM
-rm -f core conftest.err conftest.$ac_objext conftest_ipa8_conftest.oo \
-      conftest$ac_exeext conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
-{ $as_echo "$as_me:$LINENO: result: $ac_cv_lib_readline_readline" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_readline_readline" >&5
 $as_echo "$ac_cv_lib_readline_readline" >&6; }
-if test $ac_cv_lib_readline_readline = yes; then
+if test "x$ac_cv_lib_readline_readline" = x""yes; then :
   TARGET_READLINE_LIBS="-lreadline"
 else
   found="no"
@@ -13112,141 +11035,15 @@ fi
 
 
 # Check whether --with-readline-inc was given.
-if test "${with_readline_inc+set}" = set; then
+if test "${with_readline_inc+set}" = set; then :
   withval=$with_readline_inc; with_readline_inc=$withval
 else
   with_readline_inc="auto"
 fi
 
 	if test "x$with_readline_inc" = xauto; then
-		if test "${ac_cv_header_readline_h+set}" = set; then
-  { $as_echo "$as_me:$LINENO: checking for readline.h" >&5
-$as_echo_n "checking for readline.h... " >&6; }
-if test "${ac_cv_header_readline_h+set}" = set; then
-  $as_echo_n "(cached) " >&6
-fi
-{ $as_echo "$as_me:$LINENO: result: $ac_cv_header_readline_h" >&5
-$as_echo "$ac_cv_header_readline_h" >&6; }
-else
-  # Is the header compilable?
-{ $as_echo "$as_me:$LINENO: checking readline.h usability" >&5
-$as_echo_n "checking readline.h usability... " >&6; }
-cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-$ac_includes_default
-#include <readline.h>
-_ACEOF
-rm -f conftest.$ac_objext
-if { (ac_try="$ac_compile"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_compile") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest.$ac_objext; then
-  ac_header_compiler=yes
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-	ac_header_compiler=no
-fi
-
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-{ $as_echo "$as_me:$LINENO: result: $ac_header_compiler" >&5
-$as_echo "$ac_header_compiler" >&6; }
-
-# Is the header present?
-{ $as_echo "$as_me:$LINENO: checking readline.h presence" >&5
-$as_echo_n "checking readline.h presence... " >&6; }
-cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-#include <readline.h>
-_ACEOF
-if { (ac_try="$ac_cpp conftest.$ac_ext"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_cpp conftest.$ac_ext") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } >/dev/null && {
-	 test -z "$ac_c_preproc_warn_flag$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       }; then
-  ac_header_preproc=yes
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-  ac_header_preproc=no
-fi
-
-rm -f conftest.err conftest.$ac_ext
-{ $as_echo "$as_me:$LINENO: result: $ac_header_preproc" >&5
-$as_echo "$ac_header_preproc" >&6; }
-
-# So?  What about this header?
-case $ac_header_compiler:$ac_header_preproc:$ac_c_preproc_warn_flag in
-  yes:no: )
-    { $as_echo "$as_me:$LINENO: WARNING: readline.h: accepted by the compiler, rejected by the preprocessor!" >&5
-$as_echo "$as_me: WARNING: readline.h: accepted by the compiler, rejected by the preprocessor!" >&2;}
-    { $as_echo "$as_me:$LINENO: WARNING: readline.h: proceeding with the compiler's result" >&5
-$as_echo "$as_me: WARNING: readline.h: proceeding with the compiler's result" >&2;}
-    ac_header_preproc=yes
-    ;;
-  no:yes:* )
-    { $as_echo "$as_me:$LINENO: WARNING: readline.h: present but cannot be compiled" >&5
-$as_echo "$as_me: WARNING: readline.h: present but cannot be compiled" >&2;}
-    { $as_echo "$as_me:$LINENO: WARNING: readline.h:     check for missing prerequisite headers?" >&5
-$as_echo "$as_me: WARNING: readline.h:     check for missing prerequisite headers?" >&2;}
-    { $as_echo "$as_me:$LINENO: WARNING: readline.h: see the Autoconf documentation" >&5
-$as_echo "$as_me: WARNING: readline.h: see the Autoconf documentation" >&2;}
-    { $as_echo "$as_me:$LINENO: WARNING: readline.h:     section \"Present But Cannot Be Compiled\"" >&5
-$as_echo "$as_me: WARNING: readline.h:     section \"Present But Cannot Be Compiled\"" >&2;}
-    { $as_echo "$as_me:$LINENO: WARNING: readline.h: proceeding with the preprocessor's result" >&5
-$as_echo "$as_me: WARNING: readline.h: proceeding with the preprocessor's result" >&2;}
-    { $as_echo "$as_me:$LINENO: WARNING: readline.h: in the future, the compiler will take precedence" >&5
-$as_echo "$as_me: WARNING: readline.h: in the future, the compiler will take precedence" >&2;}
-
-    ;;
-esac
-{ $as_echo "$as_me:$LINENO: checking for readline.h" >&5
-$as_echo_n "checking for readline.h... " >&6; }
-if test "${ac_cv_header_readline_h+set}" = set; then
-  $as_echo_n "(cached) " >&6
-else
-  ac_cv_header_readline_h=$ac_header_preproc
-fi
-{ $as_echo "$as_me:$LINENO: result: $ac_cv_header_readline_h" >&5
-$as_echo "$ac_cv_header_readline_h" >&6; }
-
-fi
-if test $ac_cv_header_readline_h = yes; then
+		ac_fn_c_check_header_mongrel "$LINENO" "readline.h" "ac_cv_header_readline_h" "$ac_includes_default"
+if test "x$ac_cv_header_readline_h" = x""yes; then :
   found="yes"
 else
 
@@ -13255,27 +11052,23 @@ else
 				for dir in /usr /usr/local /usr/local/readline /usr/contrib /mingw; do
 					for subdir in include include/readline; do
 						as_ac_File=`$as_echo "ac_cv_file_$dir/$subdir/readline.h" | $as_tr_sh`
-{ $as_echo "$as_me:$LINENO: checking for $dir/$subdir/readline.h" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $dir/$subdir/readline.h" >&5
 $as_echo_n "checking for $dir/$subdir/readline.h... " >&6; }
-if { as_var=$as_ac_File; eval "test \"\${$as_var+set}\" = set"; }; then
+if eval "test \"\${$as_ac_File+set}\"" = set; then :
   $as_echo_n "(cached) " >&6
 else
   test "$cross_compiling" = yes &&
-  { { $as_echo "$as_me:$LINENO: error: cannot check for file existence when cross compiling" >&5
-$as_echo "$as_me: error: cannot check for file existence when cross compiling" >&2;}
-   { (exit 1); exit 1; }; }
+  as_fn_error $? "cannot check for file existence when cross compiling" "$LINENO" 5
 if test -r "$dir/$subdir/readline.h"; then
   eval "$as_ac_File=yes"
 else
   eval "$as_ac_File=no"
 fi
 fi
-ac_res=`eval 'as_val=${'$as_ac_File'}
-		 $as_echo "$as_val"'`
-	       { $as_echo "$as_me:$LINENO: result: $ac_res" >&5
+eval ac_res=\$$as_ac_File
+	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
 $as_echo "$ac_res" >&6; }
-if test `eval 'as_val=${'$as_ac_File'}
-		 $as_echo "$as_val"'` = yes; then
+if eval test \"x\$"$as_ac_File"\" = x"yes"; then :
   found=yes
 fi
 
@@ -13312,17 +11105,13 @@ fi
 # Figure out what C libraries are required to compile programs
 # that use "fdatasync()" function.
 #
-{ $as_echo "$as_me:$LINENO: checking for library containing fdatasync" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing fdatasync" >&5
 $as_echo_n "checking for library containing fdatasync... " >&6; }
-if test "${ac_cv_search_fdatasync+set}" = set; then
+if test "${ac_cv_search_fdatasync+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_func_search_save_LIBS=$LIBS
-cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
@@ -13347,54 +11136,27 @@ for ac_lib in '' rt; do
     ac_res=-l$ac_lib
     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
   fi
-  rm -f conftest.$ac_objext conftest$ac_exeext
-if { (ac_try="$ac_link"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_link") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest$ac_exeext && {
-	 test "$cross_compiling" = yes ||
-	 $as_test_x conftest$ac_exeext
-       }; then
+  if ac_fn_c_try_link "$LINENO"; then :
   ac_cv_search_fdatasync=$ac_res
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-
 fi
-
-rm -rf conftest.dSYM
-rm -f core conftest.err conftest.$ac_objext conftest_ipa8_conftest.oo \
-      conftest$ac_exeext
-  if test "${ac_cv_search_fdatasync+set}" = set; then
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext
+  if test "${ac_cv_search_fdatasync+set}" = set; then :
   break
 fi
 done
-if test "${ac_cv_search_fdatasync+set}" = set; then
-  :
+if test "${ac_cv_search_fdatasync+set}" = set; then :
+
 else
   ac_cv_search_fdatasync=no
 fi
 rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS
 fi
-{ $as_echo "$as_me:$LINENO: result: $ac_cv_search_fdatasync" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_fdatasync" >&5
 $as_echo "$ac_cv_search_fdatasync" >&6; }
 ac_res=$ac_cv_search_fdatasync
-if test "$ac_res" != no; then
+if test "$ac_res" != no; then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
 
 fi
@@ -13403,7 +11165,7 @@ fi
 #########
 # check for debug enabled
 # Check whether --enable-debug was given.
-if test "${enable_debug+set}" = set; then
+if test "${enable_debug+set}" = set; then :
   enableval=$enable_debug; use_debug=$enableval
 else
   use_debug=no
@@ -13419,7 +11181,7 @@ fi
 #########
 # See whether we should use the amalgamation to build
 # Check whether --enable-amalgamation was given.
-if test "${enable_amalgamation+set}" = set; then
+if test "${enable_amalgamation+set}" = set; then :
   enableval=$enable_amalgamation; use_amalgamation=$enableval
 else
   use_amalgamation=yes
@@ -13433,7 +11195,7 @@ fi
 #########
 # See whether we should allow loadable extensions
 # Check whether --enable-load-extension was given.
-if test "${enable_load_extension+set}" = set; then
+if test "${enable_load_extension+set}" = set; then :
   enableval=$enable_load_extension; use_loadextension=$enableval
 else
   use_loadextension=no
@@ -13441,17 +11203,13 @@ fi
 
 if test "${use_loadextension}" = "yes" ; then
   OPT_FEATURE_FLAGS=""
-  { $as_echo "$as_me:$LINENO: checking for library containing dlopen" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing dlopen" >&5
 $as_echo_n "checking for library containing dlopen... " >&6; }
-if test "${ac_cv_search_dlopen+set}" = set; then
+if test "${ac_cv_search_dlopen+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_func_search_save_LIBS=$LIBS
-cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
@@ -13476,54 +11234,27 @@ for ac_lib in '' dl; do
     ac_res=-l$ac_lib
     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
   fi
-  rm -f conftest.$ac_objext conftest$ac_exeext
-if { (ac_try="$ac_link"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
-$as_echo "$ac_try_echo") >&5
-  (eval "$ac_link") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest$ac_exeext && {
-	 test "$cross_compiling" = yes ||
-	 $as_test_x conftest$ac_exeext
-       }; then
+  if ac_fn_c_try_link "$LINENO"; then :
   ac_cv_search_dlopen=$ac_res
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-
 fi
-
-rm -rf conftest.dSYM
-rm -f core conftest.err conftest.$ac_objext conftest_ipa8_conftest.oo \
-      conftest$ac_exeext
-  if test "${ac_cv_search_dlopen+set}" = set; then
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext
+  if test "${ac_cv_search_dlopen+set}" = set; then :
   break
 fi
 done
-if test "${ac_cv_search_dlopen+set}" = set; then
-  :
+if test "${ac_cv_search_dlopen+set}" = set; then :
+
 else
   ac_cv_search_dlopen=no
 fi
 rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS
 fi
-{ $as_echo "$as_me:$LINENO: result: $ac_cv_search_dlopen" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_dlopen" >&5
 $as_echo "$ac_cv_search_dlopen" >&6; }
 ac_res=$ac_cv_search_dlopen
-if test "$ac_res" != no; then
+if test "$ac_res" != no; then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
 
 fi
@@ -13586,7 +11317,7 @@ BUILD_CFLAGS=$ac_temp_BUILD_CFLAGS
 #########
 # See whether we should use GCOV
 # Check whether --enable-gcov was given.
-if test "${enable_gcov+set}" = set; then
+if test "${enable_gcov+set}" = set; then :
   enableval=$enable_gcov; use_gcov=$enableval
 else
   use_gcov=no
@@ -13638,13 +11369,13 @@ _ACEOF
     case $ac_val in #(
     *${as_nl}*)
       case $ac_var in #(
-      *_cv_*) { $as_echo "$as_me:$LINENO: WARNING: Cache variable $ac_var contains a newline." >&5
-$as_echo "$as_me: WARNING: Cache variable $ac_var contains a newline." >&2;} ;;
+      *_cv_*) { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: cache variable $ac_var contains a newline" >&5
+$as_echo "$as_me: WARNING: cache variable $ac_var contains a newline" >&2;} ;;
       esac
       case $ac_var in #(
       _ | IFS | as_nl) ;; #(
       BASH_ARGV | BASH_SOURCE) eval $ac_var= ;; #(
-      *) $as_unset $ac_var ;;
+      *) { eval $ac_var=; unset $ac_var;} ;;
       esac ;;
     esac
   done
@@ -13652,8 +11383,8 @@ $as_echo "$as_me: WARNING: Cache variable $ac_var contains a newline." >&2;} ;;
   (set) 2>&1 |
     case $as_nl`(ac_space=' '; set) 2>&1` in #(
     *${as_nl}ac_space=\ *)
-      # `set' does not quote correctly, so add quotes (double-quote
-      # substitution turns \\\\ into \\, and sed turns \\ into \).
+      # `set' does not quote correctly, so add quotes: double-quote
+      # substitution turns \\\\ into \\, and sed turns \\ into \.
       sed -n \
 	"s/'/'\\\\''/g;
 	  s/^\\([_$as_cr_alnum]*_cv_[_$as_cr_alnum]*\\)=\\(.*\\)/\\1='\\2'/p"
@@ -13676,11 +11407,11 @@ $as_echo "$as_me: WARNING: Cache variable $ac_var contains a newline." >&2;} ;;
 if diff "$cache_file" confcache >/dev/null 2>&1; then :; else
   if test -w "$cache_file"; then
     test "x$cache_file" != "x/dev/null" &&
-      { $as_echo "$as_me:$LINENO: updating cache $cache_file" >&5
+      { $as_echo "$as_me:${as_lineno-$LINENO}: updating cache $cache_file" >&5
 $as_echo "$as_me: updating cache $cache_file" >&6;}
     cat confcache >$cache_file
   else
-    { $as_echo "$as_me:$LINENO: not updating unwritable cache $cache_file" >&5
+    { $as_echo "$as_me:${as_lineno-$LINENO}: not updating unwritable cache $cache_file" >&5
 $as_echo "$as_me: not updating unwritable cache $cache_file" >&6;}
   fi
 fi
@@ -13694,14 +11425,15 @@ DEFS=-DHAVE_CONFIG_H
 
 ac_libobjs=
 ac_ltlibobjs=
+U=
 for ac_i in : $LIBOBJS; do test "x$ac_i" = x: && continue
   # 1. Remove the extension, and $U if already installed.
   ac_script='s/\$U\././;s/\.o$//;s/\.obj$//'
   ac_i=`$as_echo "$ac_i" | sed "$ac_script"`
   # 2. Prepend LIBOBJDIR.  When used with automake>=1.10 LIBOBJDIR
   #    will be set to the directory where LIBOBJS objects are built.
-  ac_libobjs="$ac_libobjs \${LIBOBJDIR}$ac_i\$U.$ac_objext"
-  ac_ltlibobjs="$ac_ltlibobjs \${LIBOBJDIR}$ac_i"'$U.lo'
+  as_fn_append ac_libobjs " \${LIBOBJDIR}$ac_i\$U.$ac_objext"
+  as_fn_append ac_ltlibobjs " \${LIBOBJDIR}$ac_i"'$U.lo'
 done
 LIBOBJS=$ac_libobjs
 
@@ -13713,9 +11445,10 @@ LTLIBOBJS=$ac_ltlibobjs
 ac_write_fail=0
 ac_clean_files_save=$ac_clean_files
 ac_clean_files="$ac_clean_files $CONFIG_STATUS"
-{ $as_echo "$as_me:$LINENO: creating $CONFIG_STATUS" >&5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: creating $CONFIG_STATUS" >&5
 $as_echo "$as_me: creating $CONFIG_STATUS" >&6;}
-cat >$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+as_write_fail=0
+cat >$CONFIG_STATUS <<_ASEOF || as_write_fail=1
 #! $SHELL
 # Generated by $as_me.
 # Run this file to recreate the current configuration.
@@ -13725,17 +11458,18 @@ cat >$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 debug=false
 ac_cs_recheck=false
 ac_cs_silent=false
-SHELL=\${CONFIG_SHELL-$SHELL}
-_ACEOF
 
-cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
-## --------------------- ##
-## M4sh Initialization.  ##
-## --------------------- ##
+SHELL=\${CONFIG_SHELL-$SHELL}
+export SHELL
+_ASEOF
+cat >>$CONFIG_STATUS <<\_ASEOF || as_write_fail=1
+## -------------------- ##
+## M4sh Initialization. ##
+## -------------------- ##
 
 # Be more Bourne compatible
 DUALCASE=1; export DUALCASE # for MKS sh
-if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then
+if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then :
   emulate sh
   NULLCMD=:
   # Pre-4.2 versions of Zsh do word splitting on ${1+"$@"}, which
@@ -13743,23 +11477,15 @@ if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then
   alias -g '${1+"$@"}'='"$@"'
   setopt NO_GLOB_SUBST
 else
-  case `(set -o) 2>/dev/null` in
-  *posix*) set -o posix ;;
+  case `(set -o) 2>/dev/null` in #(
+  *posix*) :
+    set -o posix ;; #(
+  *) :
+     ;;
 esac
-
 fi
 
 
-
-
-# PATH needs CR
-# Avoid depending upon Character Ranges.
-as_cr_letters='abcdefghijklmnopqrstuvwxyz'
-as_cr_LETTERS='ABCDEFGHIJKLMNOPQRSTUVWXYZ'
-as_cr_Letters=$as_cr_letters$as_cr_LETTERS
-as_cr_digits='0123456789'
-as_cr_alnum=$as_cr_Letters$as_cr_digits
-
 as_nl='
 '
 export as_nl
@@ -13767,7 +11493,13 @@ export as_nl
 as_echo='\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'
 as_echo=$as_echo$as_echo$as_echo$as_echo$as_echo
 as_echo=$as_echo$as_echo$as_echo$as_echo$as_echo$as_echo
-if (test "X`printf %s $as_echo`" = "X$as_echo") 2>/dev/null; then
+# Prefer a ksh shell builtin over an external printf program on Solaris,
+# but without wasting forks for bash or zsh.
+if test -z "$BASH_VERSION$ZSH_VERSION" \
+    && (test "X`print -r -- $as_echo`" = "X$as_echo") 2>/dev/null; then
+  as_echo='print -r --'
+  as_echo_n='print -rn --'
+elif (test "X`printf %s $as_echo`" = "X$as_echo") 2>/dev/null; then
   as_echo='printf %s\n'
   as_echo_n='printf %s'
 else
@@ -13778,7 +11510,7 @@ else
     as_echo_body='eval expr "X$1" : "X\\(.*\\)"'
     as_echo_n_body='eval
       arg=$1;
-      case $arg in
+      case $arg in #(
       *"$as_nl"*)
 	expr "X$arg" : "X\\(.*\\)$as_nl";
 	arg=`expr "X$arg" : ".*$as_nl\\(.*\\)"`;;
@@ -13801,13 +11533,6 @@ if test "${PATH_SEPARATOR+set}" != set; then
   }
 fi
 
-# Support unset when possible.
-if ( (MAIL=60; unset MAIL) || exit) >/dev/null 2>&1; then
-  as_unset=unset
-else
-  as_unset=false
-fi
-
 
 # IFS
 # We need space, tab and new line, in precisely that order.  Quoting is
@@ -13817,15 +11542,15 @@ fi
 IFS=" ""	$as_nl"
 
 # Find who we are.  Look in the path if we contain no directory separator.
-case $0 in
+case $0 in #((
   *[\\/]* ) as_myself=$0 ;;
   *) as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
   test -z "$as_dir" && as_dir=.
-  test -r "$as_dir/$0" && as_myself=$as_dir/$0 && break
-done
+    test -r "$as_dir/$0" && as_myself=$as_dir/$0 && break
+  done
 IFS=$as_save_IFS
 
      ;;
@@ -13837,12 +11562,16 @@ if test "x$as_myself" = x; then
 fi
 if test ! -f "$as_myself"; then
   $as_echo "$as_myself: error: cannot find myself; rerun with an absolute file name" >&2
-  { (exit 1); exit 1; }
+  exit 1
 fi
 
-# Work around bugs in pre-3.0 UWIN ksh.
-for as_var in ENV MAIL MAILPATH
-do ($as_unset $as_var) >/dev/null 2>&1 && $as_unset $as_var
+# Unset variables that we do not need and which cause bugs (e.g. in
+# pre-3.0 UWIN ksh).  But do not cause bugs in bash 2.01; the "|| exit 1"
+# suppresses any "Segmentation fault" message there.  '((' could
+# trigger a bug in pdksh 5.2.14.
+for as_var in BASH_ENV ENV MAIL MAILPATH
+do eval test x\${$as_var+set} = xset \
+  && ( (unset $as_var) || exit 1) >/dev/null 2>&1 && unset $as_var || :
 done
 PS1='$ '
 PS2='> '
@@ -13854,7 +11583,89 @@ export LC_ALL
 LANGUAGE=C
 export LANGUAGE
 
-# Required to use basename.
+# CDPATH.
+(unset CDPATH) >/dev/null 2>&1 && unset CDPATH
+
+
+# as_fn_error STATUS ERROR [LINENO LOG_FD]
+# ----------------------------------------
+# Output "`basename $0`: error: ERROR" to stderr. If LINENO and LOG_FD are
+# provided, also output the error to LOG_FD, referencing LINENO. Then exit the
+# script with STATUS, using 1 if that was 0.
+as_fn_error ()
+{
+  as_status=$1; test $as_status -eq 0 && as_status=1
+  if test "$4"; then
+    as_lineno=${as_lineno-"$3"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+    $as_echo "$as_me:${as_lineno-$LINENO}: error: $2" >&$4
+  fi
+  $as_echo "$as_me: error: $2" >&2
+  as_fn_exit $as_status
+} # as_fn_error
+
+
+# as_fn_set_status STATUS
+# -----------------------
+# Set $? to STATUS, without forking.
+as_fn_set_status ()
+{
+  return $1
+} # as_fn_set_status
+
+# as_fn_exit STATUS
+# -----------------
+# Exit the shell with STATUS, even in a "trap 0" or "set -e" context.
+as_fn_exit ()
+{
+  set +e
+  as_fn_set_status $1
+  exit $1
+} # as_fn_exit
+
+# as_fn_unset VAR
+# ---------------
+# Portably unset VAR.
+as_fn_unset ()
+{
+  { eval $1=; unset $1;}
+}
+as_unset=as_fn_unset
+# as_fn_append VAR VALUE
+# ----------------------
+# Append the text in VALUE to the end of the definition contained in VAR. Take
+# advantage of any shell optimizations that allow amortized linear growth over
+# repeated appends, instead of the typical quadratic growth present in naive
+# implementations.
+if (eval "as_var=1; as_var+=2; test x\$as_var = x12") 2>/dev/null; then :
+  eval 'as_fn_append ()
+  {
+    eval $1+=\$2
+  }'
+else
+  as_fn_append ()
+  {
+    eval $1=\$$1\$2
+  }
+fi # as_fn_append
+
+# as_fn_arith ARG...
+# ------------------
+# Perform arithmetic evaluation on the ARGs, and store the result in the
+# global $as_val. Take advantage of shells that can avoid forks. The arguments
+# must be portable across $(()) and expr.
+if (eval "test \$(( 1 + 1 )) = 2") 2>/dev/null; then :
+  eval 'as_fn_arith ()
+  {
+    as_val=$(( $* ))
+  }'
+else
+  as_fn_arith ()
+  {
+    as_val=`expr "$@" || test $? -eq 1`
+  }
+fi # as_fn_arith
+
+
 if expr a : '\(a\)' >/dev/null 2>&1 &&
    test "X`expr 00001 : '.*\(...\)'`" = X001; then
   as_expr=expr
@@ -13868,8 +11679,12 @@ else
   as_basename=false
 fi
 
+if (as_dir=`dirname -- /` && test "X$as_dir" = X/) >/dev/null 2>&1; then
+  as_dirname=dirname
+else
+  as_dirname=false
+fi
 
-# Name of the executable.
 as_me=`$as_basename -- "$0" ||
 $as_expr X/"$0" : '.*/\([^/][^/]*\)/*$' \| \
 	 X"$0" : 'X\(//\)$' \| \
@@ -13889,76 +11704,25 @@ $as_echo X/"$0" |
 	  }
 	  s/.*/./; q'`
 
-# CDPATH.
-$as_unset CDPATH
-
-
-
-  as_lineno_1=$LINENO
-  as_lineno_2=$LINENO
-  test "x$as_lineno_1" != "x$as_lineno_2" &&
-  test "x`expr $as_lineno_1 + 1`" = "x$as_lineno_2" || {
-
-  # Create $as_me.lineno as a copy of $as_myself, but with $LINENO
-  # uniformly replaced by the line number.  The first 'sed' inserts a
-  # line-number line after each line using $LINENO; the second 'sed'
-  # does the real work.  The second script uses 'N' to pair each
-  # line-number line with the line containing $LINENO, and appends
-  # trailing '-' during substitution so that $LINENO is not a special
-  # case at line end.
-  # (Raja R Harinath suggested sed '=', and Paul Eggert wrote the
-  # scripts with optimization help from Paolo Bonzini.  Blame Lee
-  # E. McMahon (1931-1989) for sed's syntax.  :-)
-  sed -n '
-    p
-    /[$]LINENO/=
-  ' <$as_myself |
-    sed '
-      s/[$]LINENO.*/&-/
-      t lineno
-      b
-      :lineno
-      N
-      :loop
-      s/[$]LINENO\([^'$as_cr_alnum'_].*\n\)\(.*\)/\2\1\2/
-      t loop
-      s/-\n.*//
-    ' >$as_me.lineno &&
-  chmod +x "$as_me.lineno" ||
-    { $as_echo "$as_me: error: cannot create $as_me.lineno; rerun with a POSIX shell" >&2
-   { (exit 1); exit 1; }; }
-
-  # Don't try to exec as it changes $[0], causing all sort of problems
-  # (the dirname of $[0] is not the place where we might find the
-  # original and so on.  Autoconf is especially sensitive to this).
-  . "./$as_me.lineno"
-  # Exit status is that of the last command.
-  exit
-}
-
-
-if (as_dir=`dirname -- /` && test "X$as_dir" = X/) >/dev/null 2>&1; then
-  as_dirname=dirname
-else
-  as_dirname=false
-fi
+# Avoid depending upon Character Ranges.
+as_cr_letters='abcdefghijklmnopqrstuvwxyz'
+as_cr_LETTERS='ABCDEFGHIJKLMNOPQRSTUVWXYZ'
+as_cr_Letters=$as_cr_letters$as_cr_LETTERS
+as_cr_digits='0123456789'
+as_cr_alnum=$as_cr_Letters$as_cr_digits
 
 ECHO_C= ECHO_N= ECHO_T=
-case `echo -n x` in
+case `echo -n x` in #(((((
 -n*)
-  case `echo 'x\c'` in
+  case `echo 'xy\c'` in
   *c*) ECHO_T='	';;	# ECHO_T is single tab character.
-  *)   ECHO_C='\c';;
+  xy)  ECHO_C='\c';;
+  *)   echo `echo ksh88 bug on AIX 6.1` > /dev/null
+       ECHO_T='	';;
   esac;;
 *)
   ECHO_N='-n';;
 esac
-if expr a : '\(a\)' >/dev/null 2>&1 &&
-   test "X`expr 00001 : '.*\(...\)'`" = X001; then
-  as_expr=expr
-else
-  as_expr=false
-fi
 
 rm -f conf$$ conf$$.exe conf$$.file
 if test -d conf$$.dir; then
@@ -13987,8 +11751,56 @@ fi
 rm -f conf$$ conf$$.exe conf$$.dir/conf$$.file conf$$.file
 rmdir conf$$.dir 2>/dev/null
 
+
+# as_fn_mkdir_p
+# -------------
+# Create "$as_dir" as a directory, including parents if necessary.
+as_fn_mkdir_p ()
+{
+
+  case $as_dir in #(
+  -*) as_dir=./$as_dir;;
+  esac
+  test -d "$as_dir" || eval $as_mkdir_p || {
+    as_dirs=
+    while :; do
+      case $as_dir in #(
+      *\'*) as_qdir=`$as_echo "$as_dir" | sed "s/'/'\\\\\\\\''/g"`;; #'(
+      *) as_qdir=$as_dir;;
+      esac
+      as_dirs="'$as_qdir' $as_dirs"
+      as_dir=`$as_dirname -- "$as_dir" ||
+$as_expr X"$as_dir" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+	 X"$as_dir" : 'X\(//\)[^/]' \| \
+	 X"$as_dir" : 'X\(//\)$' \| \
+	 X"$as_dir" : 'X\(/\)' \| . 2>/dev/null ||
+$as_echo X"$as_dir" |
+    sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)[^/].*/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\).*/{
+	    s//\1/
+	    q
+	  }
+	  s/.*/./; q'`
+      test -d "$as_dir" && break
+    done
+    test -z "$as_dirs" || eval "mkdir $as_dirs"
+  } || test -d "$as_dir" || as_fn_error $? "cannot create directory $as_dir"
+
+
+} # as_fn_mkdir_p
 if mkdir -p . 2>/dev/null; then
-  as_mkdir_p=:
+  as_mkdir_p='mkdir -p "$as_dir"'
 else
   test -d ./-p && rmdir ./-p
   as_mkdir_p=false
@@ -14007,10 +11819,10 @@ else
       if test -d "$1"; then
 	test -d "$1/.";
       else
-	case $1 in
+	case $1 in #(
 	-*)set "./$1";;
 	esac;
-	case `ls -ld'$as_ls_L_option' "$1" 2>/dev/null` in
+	case `ls -ld'$as_ls_L_option' "$1" 2>/dev/null` in #((
 	???[sx]*):;;*)false;;esac;fi
     '\'' sh
   '
@@ -14025,13 +11837,19 @@ as_tr_sh="eval sed 'y%*+%pp%;s%[^_$as_cr_alnum]%_%g'"
 
 
 exec 6>&1
+## ----------------------------------- ##
+## Main body of $CONFIG_STATUS script. ##
+## ----------------------------------- ##
+_ASEOF
+test $as_write_fail = 0 && chmod +x $CONFIG_STATUS || ac_write_fail=1
 
-# Save the log message, to keep $[0] and so on meaningful, and to
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+# Save the log message, to keep $0 and so on meaningful, and to
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by sqlite $as_me 3.7.7.1, which was
-generated by GNU Autoconf 2.62.  Invocation command line was
+This file was extended by sqlite $as_me 3.7.9, which was
+generated by GNU Autoconf 2.67.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
   CONFIG_HEADERS  = $CONFIG_HEADERS
@@ -14044,6 +11862,15 @@ on `(hostname || uname -n) 2>/dev/null | sed 1q`
 
 _ACEOF
 
+case $ac_config_files in *"
+"*) set x $ac_config_files; shift; ac_config_files=$*;;
+esac
+
+case $ac_config_headers in *"
+"*) set x $ac_config_headers; shift; ac_config_headers=$*;;
+esac
+
+
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 # Files that config.status was made for.
 config_files="$ac_config_files"
@@ -14054,19 +11881,22 @@ _ACEOF
 
 cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 ac_cs_usage="\
-\`$as_me' instantiates files from templates according to the
-current configuration.
+\`$as_me' instantiates files and other configuration actions
+from templates according to the current configuration.  Unless the files
+and actions are specified as TAGs, all are instantiated by default.
 
-Usage: $0 [OPTIONS] [FILE]...
+Usage: $0 [OPTION]... [TAG]...
 
   -h, --help       print this help, then exit
   -V, --version    print version number and configuration settings, then exit
-  -q, --quiet      do not print progress messages
+      --config     print configuration, then exit
+  -q, --quiet, --silent
+                   do not print progress messages
   -d, --debug      don't remove temporary files
       --recheck    update $as_me by reconfiguring in the same conditions
-  --file=FILE[:TEMPLATE]
+      --file=FILE[:TEMPLATE]
                    instantiate the configuration file FILE
-  --header=FILE[:TEMPLATE]
+      --header=FILE[:TEMPLATE]
                    instantiate the configuration header FILE
 
 Configuration files:
@@ -14078,16 +11908,17 @@ $config_headers
 Configuration commands:
 $config_commands
 
-Report bugs to <bug-autoconf@gnu.org>."
+Report bugs to the package provider."
 
 _ACEOF
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
 ac_cs_version="\\
-sqlite config.status 3.7.7.1
-configured by $0, generated by GNU Autoconf 2.62,
-  with options \\"`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`\\"
+sqlite config.status 3.7.9
+configured by $0, generated by GNU Autoconf 2.67,
+  with options \\"\$ac_cs_config\\"
 
-Copyright (C) 2008 Free Software Foundation, Inc.
+Copyright (C) 2010 Free Software Foundation, Inc.
 This config.status script is free software; the Free Software Foundation
 gives unlimited permission to copy, distribute and modify it."
 
@@ -14104,11 +11935,16 @@ ac_need_defaults=:
 while test $# != 0
 do
   case $1 in
-  --*=*)
+  --*=?*)
     ac_option=`expr "X$1" : 'X\([^=]*\)='`
     ac_optarg=`expr "X$1" : 'X[^=]*=\(.*\)'`
     ac_shift=:
     ;;
+  --*=)
+    ac_option=`expr "X$1" : 'X\([^=]*\)='`
+    ac_optarg=
+    ac_shift=:
+    ;;
   *)
     ac_option=$1
     ac_optarg=$2
@@ -14122,27 +11958,29 @@ do
     ac_cs_recheck=: ;;
   --version | --versio | --versi | --vers | --ver | --ve | --v | -V )
     $as_echo "$ac_cs_version"; exit ;;
+  --config | --confi | --conf | --con | --co | --c )
+    $as_echo "$ac_cs_config"; exit ;;
   --debug | --debu | --deb | --de | --d | -d )
     debug=: ;;
   --file | --fil | --fi | --f )
     $ac_shift
     case $ac_optarg in
     *\'*) ac_optarg=`$as_echo "$ac_optarg" | sed "s/'/'\\\\\\\\''/g"` ;;
+    '') as_fn_error $? "missing file argument" ;;
     esac
-    CONFIG_FILES="$CONFIG_FILES '$ac_optarg'"
+    as_fn_append CONFIG_FILES " '$ac_optarg'"
     ac_need_defaults=false;;
   --header | --heade | --head | --hea )
     $ac_shift
     case $ac_optarg in
     *\'*) ac_optarg=`$as_echo "$ac_optarg" | sed "s/'/'\\\\\\\\''/g"` ;;
     esac
-    CONFIG_HEADERS="$CONFIG_HEADERS '$ac_optarg'"
+    as_fn_append CONFIG_HEADERS " '$ac_optarg'"
     ac_need_defaults=false;;
   --he | --h)
     # Conflict between --help and --header
-    { $as_echo "$as_me: error: ambiguous option: $1
-Try \`$0 --help' for more information." >&2
-   { (exit 1); exit 1; }; };;
+    as_fn_error $? "ambiguous option: \`$1'
+Try \`$0 --help' for more information.";;
   --help | --hel | -h )
     $as_echo "$ac_cs_usage"; exit ;;
   -q | -quiet | --quiet | --quie | --qui | --qu | --q \
@@ -14150,11 +11988,10 @@ Try \`$0 --help' for more information." >&2
     ac_cs_silent=: ;;
 
   # This is an error.
-  -*) { $as_echo "$as_me: error: unrecognized option: $1
-Try \`$0 --help' for more information." >&2
-   { (exit 1); exit 1; }; } ;;
+  -*) as_fn_error $? "unrecognized option: \`$1'
+Try \`$0 --help' for more information." ;;
 
-  *) ac_config_targets="$ac_config_targets $1"
+  *) as_fn_append ac_config_targets " $1"
      ac_need_defaults=false ;;
 
   esac
@@ -14464,9 +12301,7 @@ do
     "Makefile") CONFIG_FILES="$CONFIG_FILES Makefile" ;;
     "sqlite3.pc") CONFIG_FILES="$CONFIG_FILES sqlite3.pc" ;;
 
-  *) { { $as_echo "$as_me:$LINENO: error: invalid argument: $ac_config_target" >&5
-$as_echo "$as_me: error: invalid argument: $ac_config_target" >&2;}
-   { (exit 1); exit 1; }; };;
+  *) as_fn_error $? "invalid argument: \`$ac_config_target'" "$LINENO" 5 ;;
   esac
 done
 
@@ -14493,7 +12328,7 @@ $debug ||
   trap 'exit_status=$?
   { test -z "$tmp" || test ! -d "$tmp" || rm -fr "$tmp"; } && exit $exit_status
 ' 0
-  trap '{ (exit 1); exit 1; }' 1 2 13 15
+  trap 'as_fn_exit 1' 1 2 13 15
 }
 # Create a (secure) tmp directory for tmp files.
 
@@ -14504,11 +12339,7 @@ $debug ||
 {
   tmp=./conf$$-$RANDOM
   (umask 077 && mkdir "$tmp")
-} ||
-{
-   $as_echo "$as_me: cannot create a temporary directory in ." >&2
-   { (exit 1); exit 1; }
-}
+} || as_fn_error $? "cannot create a temporary directory in ." "$LINENO" 5
 
 # Set up the scripts for CONFIG_FILES section.
 # No need to generate them if there are no CONFIG_FILES.
@@ -14516,7 +12347,13 @@ $debug ||
 if test -n "$CONFIG_FILES"; then
 
 
-ac_cr='
'
+ac_cr=`echo X | tr X '\015'`
+# On cygwin, bash can eat \r inside `` if the user requested igncr.
+# But we know of no other shell where ac_cr would be empty at this
+# point, so we can use a bashism as a fallback.
+if test "x$ac_cr" = x; then
+  eval ac_cr=\$\'\\r\'
+fi
 ac_cs_awk_cr=`$AWK 'BEGIN { print "a\rb" }' </dev/null 2>/dev/null`
 if test "$ac_cs_awk_cr" = "a${ac_cr}b"; then
   ac_cs_awk_cr='\\r'
@@ -14533,23 +12370,18 @@ _ACEOF
   echo "$ac_subst_vars" | sed 's/.*/&!$&$ac_delim/' &&
   echo "_ACEOF"
 } >conf$$subs.sh ||
-  { { $as_echo "$as_me:$LINENO: error: could not make $CONFIG_STATUS" >&5
-$as_echo "$as_me: error: could not make $CONFIG_STATUS" >&2;}
-   { (exit 1); exit 1; }; }
-ac_delim_num=`echo "$ac_subst_vars" | grep -c '$'`
+  as_fn_error $? "could not make $CONFIG_STATUS" "$LINENO" 5
+ac_delim_num=`echo "$ac_subst_vars" | grep -c '^'`
 ac_delim='%!_!# '
 for ac_last_try in false false false false false :; do
   . ./conf$$subs.sh ||
-    { { $as_echo "$as_me:$LINENO: error: could not make $CONFIG_STATUS" >&5
-$as_echo "$as_me: error: could not make $CONFIG_STATUS" >&2;}
-   { (exit 1); exit 1; }; }
+    as_fn_error $? "could not make $CONFIG_STATUS" "$LINENO" 5
 
-  if test `sed -n "s/.*$ac_delim\$/X/p" conf$$subs.awk | grep -c X` = $ac_delim_num; then
+  ac_delim_n=`sed -n "s/.*$ac_delim\$/X/p" conf$$subs.awk | grep -c X`
+  if test $ac_delim_n = $ac_delim_num; then
     break
   elif $ac_last_try; then
-    { { $as_echo "$as_me:$LINENO: error: could not make $CONFIG_STATUS" >&5
-$as_echo "$as_me: error: could not make $CONFIG_STATUS" >&2;}
-   { (exit 1); exit 1; }; }
+    as_fn_error $? "could not make $CONFIG_STATUS" "$LINENO" 5
   else
     ac_delim="$ac_delim!$ac_delim _$ac_delim!! "
   fi
@@ -14571,7 +12403,7 @@ s/'"$ac_delim"'$//
 t delim
 :nl
 h
-s/\(.\{148\}\).*/\1/
+s/\(.\{148\}\)..*/\1/
 t more1
 s/["\\]/\\&/g; s/^/"/; s/$/\\n"\\/
 p
@@ -14585,7 +12417,7 @@ s/.\{148\}//
 t nl
 :delim
 h
-s/\(.\{148\}\).*/\1/
+s/\(.\{148\}\)..*/\1/
 t more2
 s/["\\]/\\&/g; s/^/"/; s/$/"/
 p
@@ -14638,22 +12470,28 @@ if sed "s/$ac_cr//" < /dev/null > /dev/null 2>&1; then
 else
   cat
 fi < "$tmp/subs1.awk" > "$tmp/subs.awk" \
-  || { { $as_echo "$as_me:$LINENO: error: could not setup config files machinery" >&5
-$as_echo "$as_me: error: could not setup config files machinery" >&2;}
-   { (exit 1); exit 1; }; }
+  || as_fn_error $? "could not setup config files machinery" "$LINENO" 5
 _ACEOF
 
-# VPATH may cause trouble with some makes, so we remove $(srcdir),
-# ${srcdir} and @srcdir@ from VPATH if srcdir is ".", strip leading and
+# VPATH may cause trouble with some makes, so we remove sole $(srcdir),
+# ${srcdir} and @srcdir@ entries from VPATH if srcdir is ".", strip leading and
 # trailing colons and then remove the whole line if VPATH becomes empty
 # (actually we leave an empty line to preserve line numbers).
 if test "x$srcdir" = x.; then
-  ac_vpsub='/^[	 ]*VPATH[	 ]*=/{
-s/:*\$(srcdir):*/:/
-s/:*\${srcdir}:*/:/
-s/:*@srcdir@:*/:/
-s/^\([^=]*=[	 ]*\):*/\1/
+  ac_vpsub='/^[	 ]*VPATH[	 ]*=[	 ]*/{
+h
+s///
+s/^/:/
+s/[	 ]*$/:/
+s/:\$(srcdir):/:/g
+s/:\${srcdir}:/:/g
+s/:@srcdir@:/:/g
+s/^:*//
 s/:*$//
+x
+s/\(=[	 ]*\).*/\1/
+G
+s/\n//
 s/^[^=]*=[	 ]*$//
 }'
 fi
@@ -14681,9 +12519,7 @@ for ac_last_try in false false :; do
   if test -z "$ac_t"; then
     break
   elif $ac_last_try; then
-    { { $as_echo "$as_me:$LINENO: error: could not make $CONFIG_HEADERS" >&5
-$as_echo "$as_me: error: could not make $CONFIG_HEADERS" >&2;}
-   { (exit 1); exit 1; }; }
+    as_fn_error $? "could not make $CONFIG_HEADERS" "$LINENO" 5
   else
     ac_delim="$ac_delim!$ac_delim _$ac_delim!! "
   fi
@@ -14749,9 +12585,9 @@ cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
   }
   split(mac1, mac2, "(") #)
   macro = mac2[1]
+  prefix = substr(line, 1, index(line, defundef) - 1)
   if (D_is_set[macro]) {
     # Preserve the white space surrounding the "#".
-    prefix = substr(line, 1, index(line, defundef) - 1)
     print prefix "define", macro P[macro] D[macro]
     next
   } else {
@@ -14759,7 +12595,7 @@ cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
     # in the case of _POSIX_SOURCE, which is predefined and required
     # on some systems where configure will not decide to define it.
     if (defundef == "undef") {
-      print "/*", line, "*/"
+      print "/*", prefix defundef, macro, "*/"
       next
     }
   }
@@ -14768,9 +12604,7 @@ cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 _ACAWK
 _ACEOF
 cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
-  { { $as_echo "$as_me:$LINENO: error: could not setup config headers machinery" >&5
-$as_echo "$as_me: error: could not setup config headers machinery" >&2;}
-   { (exit 1); exit 1; }; }
+  as_fn_error $? "could not setup config headers machinery" "$LINENO" 5
 fi # test -n "$CONFIG_HEADERS"
 
 
@@ -14783,9 +12617,7 @@ do
   esac
   case $ac_mode$ac_tag in
   :[FHL]*:*);;
-  :L* | :C*:*) { { $as_echo "$as_me:$LINENO: error: Invalid tag $ac_tag." >&5
-$as_echo "$as_me: error: Invalid tag $ac_tag." >&2;}
-   { (exit 1); exit 1; }; };;
+  :L* | :C*:*) as_fn_error $? "invalid tag \`$ac_tag'" "$LINENO" 5 ;;
   :[FH]-) ac_tag=-:-;;
   :[FH]*) ac_tag=$ac_tag:$ac_tag.in;;
   esac
@@ -14813,12 +12645,10 @@ $as_echo "$as_me: error: Invalid tag $ac_tag." >&2;}
 	   [\\/$]*) false;;
 	   *) test -f "$srcdir/$ac_f" && ac_f="$srcdir/$ac_f";;
 	   esac ||
-	   { { $as_echo "$as_me:$LINENO: error: cannot find input file: $ac_f" >&5
-$as_echo "$as_me: error: cannot find input file: $ac_f" >&2;}
-   { (exit 1); exit 1; }; };;
+	   as_fn_error 1 "cannot find input file: \`$ac_f'" "$LINENO" 5 ;;
       esac
       case $ac_f in *\'*) ac_f=`$as_echo "$ac_f" | sed "s/'/'\\\\\\\\''/g"`;; esac
-      ac_file_inputs="$ac_file_inputs '$ac_f'"
+      as_fn_append ac_file_inputs " '$ac_f'"
     done
 
     # Let's still pretend it is `configure' which instantiates (i.e., don't
@@ -14829,7 +12659,7 @@ $as_echo "$as_me: error: cannot find input file: $ac_f" >&2;}
 	`' by configure.'
     if test x"$ac_file" != x-; then
       configure_input="$ac_file.  $configure_input"
-      { $as_echo "$as_me:$LINENO: creating $ac_file" >&5
+      { $as_echo "$as_me:${as_lineno-$LINENO}: creating $ac_file" >&5
 $as_echo "$as_me: creating $ac_file" >&6;}
     fi
     # Neutralize special characters interpreted by sed in replacement strings.
@@ -14842,9 +12672,7 @@ $as_echo "$as_me: creating $ac_file" >&6;}
 
     case $ac_tag in
     *:-:* | *:-) cat >"$tmp/stdin" \
-      || { { $as_echo "$as_me:$LINENO: error: could not create $ac_file" >&5
-$as_echo "$as_me: error: could not create $ac_file" >&2;}
-   { (exit 1); exit 1; }; } ;;
+      || as_fn_error $? "could not create $ac_file" "$LINENO" 5  ;;
     esac
     ;;
   esac
@@ -14872,47 +12700,7 @@ $as_echo X"$ac_file" |
 	    q
 	  }
 	  s/.*/./; q'`
-  { as_dir="$ac_dir"
-  case $as_dir in #(
-  -*) as_dir=./$as_dir;;
-  esac
-  test -d "$as_dir" || { $as_mkdir_p && mkdir -p "$as_dir"; } || {
-    as_dirs=
-    while :; do
-      case $as_dir in #(
-      *\'*) as_qdir=`$as_echo "$as_dir" | sed "s/'/'\\\\\\\\''/g"`;; #'(
-      *) as_qdir=$as_dir;;
-      esac
-      as_dirs="'$as_qdir' $as_dirs"
-      as_dir=`$as_dirname -- "$as_dir" ||
-$as_expr X"$as_dir" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
-	 X"$as_dir" : 'X\(//\)[^/]' \| \
-	 X"$as_dir" : 'X\(//\)$' \| \
-	 X"$as_dir" : 'X\(/\)' \| . 2>/dev/null ||
-$as_echo X"$as_dir" |
-    sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
-	    s//\1/
-	    q
-	  }
-	  /^X\(\/\/\)[^/].*/{
-	    s//\1/
-	    q
-	  }
-	  /^X\(\/\/\)$/{
-	    s//\1/
-	    q
-	  }
-	  /^X\(\/\).*/{
-	    s//\1/
-	    q
-	  }
-	  s/.*/./; q'`
-      test -d "$as_dir" && break
-    done
-    test -z "$as_dirs" || eval "mkdir $as_dirs"
-  } || test -d "$as_dir" || { { $as_echo "$as_me:$LINENO: error: cannot create directory $as_dir" >&5
-$as_echo "$as_me: error: cannot create directory $as_dir" >&2;}
-   { (exit 1); exit 1; }; }; }
+  as_dir="$ac_dir"; as_fn_mkdir_p
   ac_builddir=.
 
 case "$ac_dir" in
@@ -14964,7 +12752,6 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 # If the template does not know about datarootdir, expand it.
 # FIXME: This hack should be removed a few years after 2.60.
 ac_datarootdir_hack=; ac_datarootdir_seen=
-
 ac_sed_dataroot='
 /datarootdir/ {
   p
@@ -14974,12 +12761,11 @@ ac_sed_dataroot='
 /@docdir@/p
 /@infodir@/p
 /@localedir@/p
-/@mandir@/p
-'
+/@mandir@/p'
 case `eval "sed -n \"\$ac_sed_dataroot\" $ac_file_inputs"` in
 *datarootdir*) ac_datarootdir_seen=yes;;
 *@datadir@*|*@docdir@*|*@infodir@*|*@localedir@*|*@mandir@*)
-  { $as_echo "$as_me:$LINENO: WARNING: $ac_file_inputs seems to ignore the --datarootdir setting" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $ac_file_inputs seems to ignore the --datarootdir setting" >&5
 $as_echo "$as_me: WARNING: $ac_file_inputs seems to ignore the --datarootdir setting" >&2;}
 _ACEOF
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
@@ -14989,7 +12775,7 @@ cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
   s&@infodir@&$infodir&g
   s&@localedir@&$localedir&g
   s&@mandir@&$mandir&g
-    s&\\\${datarootdir}&$datarootdir&g' ;;
+  s&\\\${datarootdir}&$datarootdir&g' ;;
 esac
 _ACEOF
 
@@ -15017,26 +12803,22 @@ s&@INSTALL@&$ac_INSTALL&;t t
 $ac_datarootdir_hack
 "
 eval sed \"\$ac_sed_extra\" "$ac_file_inputs" | $AWK -f "$tmp/subs.awk" >$tmp/out \
-  || { { $as_echo "$as_me:$LINENO: error: could not create $ac_file" >&5
-$as_echo "$as_me: error: could not create $ac_file" >&2;}
-   { (exit 1); exit 1; }; }
+  || as_fn_error $? "could not create $ac_file" "$LINENO" 5
 
 test -z "$ac_datarootdir_hack$ac_datarootdir_seen" &&
   { ac_out=`sed -n '/\${datarootdir}/p' "$tmp/out"`; test -n "$ac_out"; } &&
   { ac_out=`sed -n '/^[	 ]*datarootdir[	 ]*:*=/p' "$tmp/out"`; test -z "$ac_out"; } &&
-  { $as_echo "$as_me:$LINENO: WARNING: $ac_file contains a reference to the variable \`datarootdir'
-which seems to be undefined.  Please make sure it is defined." >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $ac_file contains a reference to the variable \`datarootdir'
+which seems to be undefined.  Please make sure it is defined" >&5
 $as_echo "$as_me: WARNING: $ac_file contains a reference to the variable \`datarootdir'
-which seems to be undefined.  Please make sure it is defined." >&2;}
+which seems to be undefined.  Please make sure it is defined" >&2;}
 
   rm -f "$tmp/stdin"
   case $ac_file in
   -) cat "$tmp/out" && rm -f "$tmp/out";;
   *) rm -f "$ac_file" && mv "$tmp/out" "$ac_file";;
   esac \
-  || { { $as_echo "$as_me:$LINENO: error: could not create $ac_file" >&5
-$as_echo "$as_me: error: could not create $ac_file" >&2;}
-   { (exit 1); exit 1; }; }
+  || as_fn_error $? "could not create $ac_file" "$LINENO" 5
  ;;
   :H)
   #
@@ -15047,29 +12829,23 @@ $as_echo "$as_me: error: could not create $ac_file" >&2;}
       $as_echo "/* $configure_input  */" \
       && eval '$AWK -f "$tmp/defines.awk"' "$ac_file_inputs"
     } >"$tmp/config.h" \
-      || { { $as_echo "$as_me:$LINENO: error: could not create $ac_file" >&5
-$as_echo "$as_me: error: could not create $ac_file" >&2;}
-   { (exit 1); exit 1; }; }
+      || as_fn_error $? "could not create $ac_file" "$LINENO" 5
     if diff "$ac_file" "$tmp/config.h" >/dev/null 2>&1; then
-      { $as_echo "$as_me:$LINENO: $ac_file is unchanged" >&5
+      { $as_echo "$as_me:${as_lineno-$LINENO}: $ac_file is unchanged" >&5
 $as_echo "$as_me: $ac_file is unchanged" >&6;}
     else
       rm -f "$ac_file"
       mv "$tmp/config.h" "$ac_file" \
-	|| { { $as_echo "$as_me:$LINENO: error: could not create $ac_file" >&5
-$as_echo "$as_me: error: could not create $ac_file" >&2;}
-   { (exit 1); exit 1; }; }
+	|| as_fn_error $? "could not create $ac_file" "$LINENO" 5
     fi
   else
     $as_echo "/* $configure_input  */" \
       && eval '$AWK -f "$tmp/defines.awk"' "$ac_file_inputs" \
-      || { { $as_echo "$as_me:$LINENO: error: could not create -" >&5
-$as_echo "$as_me: error: could not create -" >&2;}
-   { (exit 1); exit 1; }; }
+      || as_fn_error $? "could not create -" "$LINENO" 5
   fi
  ;;
 
-  :C)  { $as_echo "$as_me:$LINENO: executing $ac_file commands" >&5
+  :C)  { $as_echo "$as_me:${as_lineno-$LINENO}: executing $ac_file commands" >&5
 $as_echo "$as_me: executing $ac_file commands" >&6;}
  ;;
   esac
@@ -15716,15 +13492,12 @@ _LT_EOF
 done # for ac_tag
 
 
-{ (exit 0); exit 0; }
+as_fn_exit 0
 _ACEOF
-chmod +x $CONFIG_STATUS
 ac_clean_files=$ac_clean_files_save
 
 test $ac_write_fail = 0 ||
-  { { $as_echo "$as_me:$LINENO: error: write failure creating $CONFIG_STATUS" >&5
-$as_echo "$as_me: error: write failure creating $CONFIG_STATUS" >&2;}
-   { (exit 1); exit 1; }; }
+  as_fn_error $? "write failure creating $CONFIG_STATUS" "$LINENO" 5
 
 
 # configure is writing to config.log, and then calls config.status.
@@ -15745,10 +13518,10 @@ if test "$no_create" != yes; then
   exec 5>>config.log
   # Use ||, not &&, to avoid exiting from the if with $? = 1, which
   # would make configure fail if this is the last instruction.
-  $ac_cs_success || { (exit 1); exit 1; }
+  $ac_cs_success || as_fn_exit 1
 fi
 if test -n "$ac_unrecognized_opts" && test "$enable_option_checking" != no; then
-  { $as_echo "$as_me:$LINENO: WARNING: Unrecognized options: $ac_unrecognized_opts" >&5
-$as_echo "$as_me: WARNING: Unrecognized options: $ac_unrecognized_opts" >&2;}
+  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: unrecognized options: $ac_unrecognized_opts" >&5
+$as_echo "$as_me: WARNING: unrecognized options: $ac_unrecognized_opts" >&2;}
 fi
 
diff --git a/doc/lemon.html b/doc/lemon.html
index 6a4d6dbd..2c655559 100644
--- a/doc/lemon.html
+++ b/doc/lemon.html
@@ -282,7 +282,7 @@ tokens) and it honors the same commenting conventions as C and C++.</p>
 <p>A terminal symbol (token) is any string of alphanumeric
 and underscore characters
 that begins with an upper case letter.
-A terminal can contain lower class letters after the first character,
+A terminal can contain lowercase letters after the first character,
 but the usual convention is to make terminals all upper case.
 A nonterminal, on the other hand, is any string of alphanumeric
 and underscore characters than begins with a lower case letter.
diff --git a/ext/fts3/README.content b/ext/fts3/README.content
new file mode 100644
index 00000000..ab986754
--- /dev/null
+++ b/ext/fts3/README.content
@@ -0,0 +1,178 @@
+
+FTS4 CONTENT OPTION
+
+  Normally, in order to create a full-text index on a dataset, the FTS4 
+  module stores a copy of all indexed documents in a specially created 
+  database table.
+
+  As of SQLite version 3.7.9, FTS4 supports a new option - "content" -
+  designed to extend FTS4 to support the creation of full-text indexes where:
+
+    * The indexed documents are not stored within the SQLite database 
+      at all (a "contentless" FTS4 table), or
+
+    * The indexed documents are stored in a database table created and
+      managed by the user (an "external content" FTS4 table).
+
+  Because the indexed documents themselves are usually much larger than 
+  the full-text index, the content option can sometimes be used to achieve 
+  significant space savings.
+
+CONTENTLESS FTS4 TABLES
+
+  In order to create an FTS4 table that does not store a copy of the indexed
+  documents at all, the content option should be set to an empty string.
+  For example, the following SQL creates such an FTS4 table with three
+  columns - "a", "b", and "c":
+
+    CREATE VIRTUAL TABLE t1 USING fts4(content="", a, b, c);
+
+  Data can be inserted into such an FTS4 table using an INSERT statements.
+  However, unlike ordinary FTS4 tables, the user must supply an explicit
+  integer docid value. For example:
+
+    -- This statement is Ok:
+    INSERT INTO t1(docid, a, b, c) VALUES(1, 'a b c', 'd e f', 'g h i');
+
+    -- This statement causes an error, as no docid value has been provided:
+    INSERT INTO t1(a, b, c) VALUES('j k l', 'm n o', 'p q r');
+
+  It is not possible to UPDATE or DELETE a row stored in a contentless FTS4
+  table. Attempting to do so is an error.
+
+  Contentless FTS4 tables also support SELECT statements. However, it is
+  an error to attempt to retrieve the value of any table column other than
+  the docid column. The auxiliary function matchinfo() may be used, but
+  snippet() and offsets() may not. For example:
+
+    -- The following statements are Ok:
+    SELECT docid FROM t1 WHERE t1 MATCH 'xxx';
+    SELECT docid FROM t1 WHERE a MATCH 'xxx';
+    SELECT matchinfo(t1) FROM t1 WHERE t1 MATCH 'xxx';
+
+    -- The following statements all cause errors, as the value of columns
+    -- other than docid are required to evaluate them.
+    SELECT * FROM t1;
+    SELECT a, b FROM t1 WHERE t1 MATCH 'xxx';
+    SELECT docid FROM t1 WHERE a LIKE 'xxx%';
+    SELECT snippet(t1) FROM t1 WHERE t1 MATCH 'xxx';
+
+  Errors related to attempting to retrieve column values other than docid
+  are runtime errors that occur within sqlite3_step(). In some cases, for
+  example if the MATCH expression in a SELECT query matches zero rows, there
+  may be no error at all even if a statement does refer to column values 
+  other than docid.
+
+EXTERNAL CONTENT FTS4 TABLES
+
+  An "external content" FTS4 table is similar to a contentless table, except
+  that if evaluation of a query requires the value of a column other than 
+  docid, FTS4 attempts to retrieve that value from a table (or view, or 
+  virtual table) nominated by the user (hereafter referred to as the "content
+  table"). The FTS4 module never writes to the content table, and writing
+  to the content table does not affect the full-text index. It is the
+  responsibility of the user to ensure that the content table and the 
+  full-text index are consistent.
+
+  An external content FTS4 table is created by setting the content option
+  to the name of a table (or view, or virtual table) that may be queried by
+  FTS4 to retrieve column values when required. If the nominated table does
+  not exist, then an external content table behaves in the same way as
+  a contentless table. For example:
+
+    CREATE TABLE t2(id INTEGER PRIMARY KEY, a, b, c);
+    CREATE VIRTUAL TABLE t3 USING fts4(content="t2", a, c);
+
+  Assuming the nominated table does exist, then its columns must be the same 
+  as or a superset of those defined for the FTS table.
+
+  When a users query on the FTS table requires a column value other than
+  docid, FTS attempts to read this value from the corresponding column of
+  the row in the content table with a rowid value equal to the current FTS
+  docid. Or, if such a row cannot be found in the content table, a NULL
+  value is used instead. For example:
+
+    CREATE TABLE t2(id INTEGER PRIMARY KEY, a, b, c, d);
+    CREATE VIRTUAL TABLE t3 USING fts4(content="t2", b, c);
+  
+    INSERT INTO t2 VALUES(2, 'a b', 'c d', 'e f');
+    INSERT INTO t2 VALUES(3, 'g h', 'i j', 'k l');
+    INSERT INTO t3(docid, b, c) SELECT id, b, c FROM t2;
+
+    -- The following query returns a single row with two columns containing
+    -- the text values "i j" and "k l".
+    --
+    -- The query uses the full-text index to discover that the MATCH 
+    -- term matches the row with docid=3. It then retrieves the values
+    -- of columns b and c from the row with rowid=3 in the content table
+    -- to return.
+    --
+    SELECT * FROM t3 WHERE t3 MATCH 'k';
+
+    -- Following the UPDATE, the query still returns a single row, this
+    -- time containing the text values "xxx" and "yyy". This is because the
+    -- full-text index still indicates that the row with docid=3 matches
+    -- the FTS4 query 'k', even though the documents stored in the content
+    -- table have been modified.
+    --
+    UPDATE t2 SET b = 'xxx', c = 'yyy' WHERE rowid = 3;
+    SELECT * FROM t3 WHERE t3 MATCH 'k';
+
+    -- Following the DELETE below, the query returns one row containing two
+    -- NULL values. NULL values are returned because FTS is unable to find
+    -- a row with rowid=3 within the content table.
+    --
+    DELETE FROM t2;
+    SELECT * FROM t3 WHERE t3 MATCH 'k';
+
+  When a row is deleted from an external content FTS4 table, FTS4 needs to
+  retrieve the column values of the row being deleted from the content table.
+  This is so that FTS4 can update the full-text index entries for each token
+  that occurs within the deleted row to indicate that that row has been 
+  deleted. If the content table row cannot be found, or if it contains values
+  inconsistent with the contents of the FTS index, the results can be difficult
+  to predict. The FTS index may be left containing entries corresponding to the
+  deleted row, which can lead to seemingly nonsensical results being returned
+  by subsequent SELECT queries. The same applies when a row is updated, as
+  internally an UPDATE is the same as a DELETE followed by an INSERT.
+  
+  Instead of writing separately to the full-text index and the content table,
+  some users may wish to use database triggers to keep the full-text index
+  up to date with respect to the set of documents stored in the content table.
+  For example, using the tables from earlier examples:
+
+    CREATE TRIGGER t2_bu BEFORE UPDATE ON t2 BEGIN
+      DELETE FROM t3 WHERE docid=old.rowid;
+    END;
+    CREATE TRIGGER t2_bd BEFORE DELETE ON t2 BEGIN
+      DELETE FROM t3 WHERE docid=old.rowid;
+    END;
+
+    CREATE TRIGGER t2_bu AFTER UPDATE ON t2 BEGIN
+      INSERT INTO t3(docid, b, c) VALUES(new.rowid, new.b, new.c);
+    END;
+    CREATE TRIGGER t2_bd AFTER INSERT ON t2 BEGIN
+      INSERT INTO t3(docid, b, c) VALUES(new.rowid, new.b, new.c);
+    END;
+
+  The DELETE trigger must be fired before the actual delete takes place
+  on the content table. This is so that FTS4 can still retrieve the original
+  values in order to update the full-text index. And the INSERT trigger must
+  be fired after the new row is inserted, so as to handle the case where the
+  rowid is assigned automatically within the system. The UPDATE trigger must
+  be split into two parts, one fired before and one after the update of the
+  content table, for the same reasons.
+
+  FTS4 features a special command similar to the 'optimize' command that
+  deletes the entire full-text index and rebuilds it based on the current
+  set of documents in the content table. Assuming again that "t3" is the
+  name of the external content FTS4 table, the command is:
+
+    INSERT INTO t3(t3) VALUES('rebuild');
+
+  This command may also be used with ordinary FTS4 tables, although it may
+  only be useful if the full-text index has somehow become corrupt. It is an
+  error to attempt to rebuild the full-text index maintained by a contentless
+  FTS4 table.
+
+
diff --git a/ext/fts3/fts3.c b/ext/fts3/fts3.c
index 67a0ea20..12013f2b 100644
--- a/ext/fts3/fts3.c
+++ b/ext/fts3/fts3.c
@@ -312,6 +312,11 @@
   SQLITE_EXTENSION_INIT1
 #endif
 
+static int fts3EvalNext(Fts3Cursor *pCsr);
+static int fts3EvalStart(Fts3Cursor *pCsr);
+static int fts3TermSegReaderCursor(
+    Fts3Cursor *, const char *, int, int, Fts3MultiSegReader **);
+
 /* 
 ** Write a 64-bit variable-length integer to memory starting at p[0].
 ** The length of data written will be between 1 and FTS3_VARINT_MAX bytes.
@@ -433,7 +438,7 @@ static void fts3GetReverseVarint(
   sqlite3_int64 *pVal
 ){
   sqlite3_int64 iVal;
-  char *p = *pp;
+  char *p;
 
   /* Pointer p now points at the first byte past the varint we are 
   ** interested in. So, unless the doclist is corrupt, the 0x80 bit is
@@ -463,6 +468,7 @@ static int fts3DisconnectMethod(sqlite3_vtab *pVtab){
   sqlite3_free(p->zSegmentsTbl);
   sqlite3_free(p->zReadExprlist);
   sqlite3_free(p->zWriteExprlist);
+  sqlite3_free(p->zContentTbl);
 
   /* Invoke the tokenizer destructor to free the tokenizer. */
   p->pTokenizer->pModule->xDestroy(p->pTokenizer);
@@ -502,16 +508,19 @@ static void fts3DbExec(
 ** The xDestroy() virtual table method.
 */
 static int fts3DestroyMethod(sqlite3_vtab *pVtab){
-  int rc = SQLITE_OK;              /* Return code */
   Fts3Table *p = (Fts3Table *)pVtab;
-  sqlite3 *db = p->db;
+  int rc = SQLITE_OK;              /* Return code */
+  const char *zDb = p->zDb;        /* Name of database (e.g. "main", "temp") */
+  sqlite3 *db = p->db;             /* Database handle */
 
   /* Drop the shadow tables */
-  fts3DbExec(&rc, db, "DROP TABLE IF EXISTS %Q.'%q_content'", p->zDb, p->zName);
-  fts3DbExec(&rc, db, "DROP TABLE IF EXISTS %Q.'%q_segments'", p->zDb,p->zName);
-  fts3DbExec(&rc, db, "DROP TABLE IF EXISTS %Q.'%q_segdir'", p->zDb, p->zName);
-  fts3DbExec(&rc, db, "DROP TABLE IF EXISTS %Q.'%q_docsize'", p->zDb, p->zName);
-  fts3DbExec(&rc, db, "DROP TABLE IF EXISTS %Q.'%q_stat'", p->zDb, p->zName);
+  if( p->zContentTbl==0 ){
+    fts3DbExec(&rc, db, "DROP TABLE IF EXISTS %Q.'%q_content'", zDb, p->zName);
+  }
+  fts3DbExec(&rc, db, "DROP TABLE IF EXISTS %Q.'%q_segments'", zDb,p->zName);
+  fts3DbExec(&rc, db, "DROP TABLE IF EXISTS %Q.'%q_segdir'", zDb, p->zName);
+  fts3DbExec(&rc, db, "DROP TABLE IF EXISTS %Q.'%q_docsize'", zDb, p->zName);
+  fts3DbExec(&rc, db, "DROP TABLE IF EXISTS %Q.'%q_stat'", zDb, p->zName);
 
   /* If everything has worked, invoke fts3DisconnectMethod() to free the
   ** memory associated with the Fts3Table structure and return SQLITE_OK.
@@ -573,23 +582,27 @@ static void fts3DeclareVtab(int *pRc, Fts3Table *p){
 static int fts3CreateTables(Fts3Table *p){
   int rc = SQLITE_OK;             /* Return code */
   int i;                          /* Iterator variable */
-  char *zContentCols;             /* Columns of %_content table */
   sqlite3 *db = p->db;            /* The database connection */
 
-  /* Create a list of user columns for the content table */
-  zContentCols = sqlite3_mprintf("docid INTEGER PRIMARY KEY");
-  for(i=0; zContentCols && i<p->nColumn; i++){
-    char *z = p->azColumn[i];
-    zContentCols = sqlite3_mprintf("%z, 'c%d%q'", zContentCols, i, z);
-  }
-  if( zContentCols==0 ) rc = SQLITE_NOMEM;
+  if( p->zContentTbl==0 ){
+    char *zContentCols;           /* Columns of %_content table */
+
+    /* Create a list of user columns for the content table */
+    zContentCols = sqlite3_mprintf("docid INTEGER PRIMARY KEY");
+    for(i=0; zContentCols && i<p->nColumn; i++){
+      char *z = p->azColumn[i];
+      zContentCols = sqlite3_mprintf("%z, 'c%d%q'", zContentCols, i, z);
+    }
+    if( zContentCols==0 ) rc = SQLITE_NOMEM;
+  
+    /* Create the content table */
+    fts3DbExec(&rc, db, 
+       "CREATE TABLE %Q.'%q_content'(%s)",
+       p->zDb, p->zName, zContentCols
+    );
+    sqlite3_free(zContentCols);
+  }
 
-  /* Create the content table */
-  fts3DbExec(&rc, db, 
-     "CREATE TABLE %Q.'%q_content'(%s)",
-     p->zDb, p->zName, zContentCols
-  );
-  sqlite3_free(zContentCols);
   /* Create other tables */
   fts3DbExec(&rc, db, 
       "CREATE TABLE %Q.'%q_segments'(blockid INTEGER PRIMARY KEY, block BLOB);",
@@ -740,8 +753,8 @@ static char *fts3QuoteId(char const *zInput){
 }
 
 /*
-** Return a list of comma separated SQL expressions that could be used
-** in a SELECT statement such as the following:
+** Return a list of comma separated SQL expressions and a FROM clause that 
+** could be used in a SELECT statement such as the following:
 **
 **     SELECT <list of expressions> FROM %_content AS x ...
 **
@@ -752,7 +765,7 @@ static char *fts3QuoteId(char const *zInput){
 ** table has the three user-defined columns "a", "b", and "c", the following
 ** string is returned:
 **
-**     "docid, unzip(x.'a'), unzip(x.'b'), unzip(x.'c')"
+**     "docid, unzip(x.'a'), unzip(x.'b'), unzip(x.'c') FROM %_content AS x"
 **
 ** The pointer returned points to a buffer allocated by sqlite3_malloc(). It
 ** is the responsibility of the caller to eventually free it.
@@ -768,16 +781,28 @@ static char *fts3ReadExprList(Fts3Table *p, const char *zFunc, int *pRc){
   char *zFunction;
   int i;
 
-  if( !zFunc ){
-    zFunction = "";
+  if( p->zContentTbl==0 ){
+    if( !zFunc ){
+      zFunction = "";
+    }else{
+      zFree = zFunction = fts3QuoteId(zFunc);
+    }
+    fts3Appendf(pRc, &zRet, "docid");
+    for(i=0; i<p->nColumn; i++){
+      fts3Appendf(pRc, &zRet, ",%s(x.'c%d%q')", zFunction, i, p->azColumn[i]);
+    }
+    sqlite3_free(zFree);
   }else{
-    zFree = zFunction = fts3QuoteId(zFunc);
+    fts3Appendf(pRc, &zRet, "rowid");
+    for(i=0; i<p->nColumn; i++){
+      fts3Appendf(pRc, &zRet, ", x.'%q'", p->azColumn[i]);
+    }
   }
-  fts3Appendf(pRc, &zRet, "docid");
-  for(i=0; i<p->nColumn; i++){
-    fts3Appendf(pRc, &zRet, ",%s(x.'c%d%q')", zFunction, i, p->azColumn[i]);
-  }
-  sqlite3_free(zFree);
+  fts3Appendf(pRc, &zRet, "FROM '%q'.'%q%s' AS x", 
+      p->zDb,
+      (p->zContentTbl ? p->zContentTbl : p->zName),
+      (p->zContentTbl ? "" : "_content")
+  );
   return zRet;
 }
 
@@ -820,9 +845,23 @@ static char *fts3WriteExprList(Fts3Table *p, const char *zFunc, int *pRc){
   return zRet;
 }
 
+/*
+** This function interprets the string at (*pp) as a non-negative integer
+** value. It reads the integer and sets *pnOut to the value read, then 
+** sets *pp to point to the byte immediately following the last byte of
+** the integer value.
+**
+** Only decimal digits ('0'..'9') may be part of an integer value. 
+**
+** If *pp does not being with a decimal digit SQLITE_ERROR is returned and
+** the output value undefined. Otherwise SQLITE_OK is returned.
+**
+** This function is used when parsing the "prefix=" FTS4 parameter.
+*/
 static int fts3GobbleInt(const char **pp, int *pnOut){
-  const char *p = *pp;
-  int nInt = 0;
+  const char *p;                  /* Iterator pointer */
+  int nInt = 0;                   /* Output value */
+
   for(p=*pp; p[0]>='0' && p[0]<='9'; p++){
     nInt = nInt * 10 + (p[0] - '0');
   }
@@ -832,15 +871,30 @@ static int fts3GobbleInt(const char **pp, int *pnOut){
   return SQLITE_OK;
 }
 
-
+/*
+** This function is called to allocate an array of Fts3Index structures
+** representing the indexes maintained by the current FTS table. FTS tables
+** always maintain the main "terms" index, but may also maintain one or
+** more "prefix" indexes, depending on the value of the "prefix=" parameter
+** (if any) specified as part of the CREATE VIRTUAL TABLE statement.
+**
+** Argument zParam is passed the value of the "prefix=" option if one was
+** specified, or NULL otherwise.
+**
+** If no error occurs, SQLITE_OK is returned and *apIndex set to point to
+** the allocated array. *pnIndex is set to the number of elements in the
+** array. If an error does occur, an SQLite error code is returned.
+**
+** Regardless of whether or not an error is returned, it is the responsibility
+** of the caller to call sqlite3_free() on the output array to free it.
+*/
 static int fts3PrefixParameter(
   const char *zParam,             /* ABC in prefix=ABC parameter to parse */
   int *pnIndex,                   /* OUT: size of *apIndex[] array */
-  struct Fts3Index **apIndex,     /* OUT: Array of indexes for this table */
-  struct Fts3Index **apFree       /* OUT: Free this with sqlite3_free() */
+  struct Fts3Index **apIndex      /* OUT: Array of indexes for this table */
 ){
-  struct Fts3Index *aIndex;
-  int nIndex = 1;
+  struct Fts3Index *aIndex;       /* Allocated array */
+  int nIndex = 1;                 /* Number of entries in array */
 
   if( zParam && zParam[0] ){
     const char *p;
@@ -851,7 +905,7 @@ static int fts3PrefixParameter(
   }
 
   aIndex = sqlite3_malloc(sizeof(struct Fts3Index) * nIndex);
-  *apIndex = *apFree = aIndex;
+  *apIndex = aIndex;
   *pnIndex = nIndex;
   if( !aIndex ){
     return SQLITE_NOMEM;
@@ -872,6 +926,91 @@ static int fts3PrefixParameter(
   return SQLITE_OK;
 }
 
+/*
+** This function is called when initializing an FTS4 table that uses the
+** content=xxx option. It determines the number of and names of the columns
+** of the new FTS4 table.
+**
+** The third argument passed to this function is the value passed to the
+** config=xxx option (i.e. "xxx"). This function queries the database for
+** a table of that name. If found, the output variables are populated
+** as follows:
+**
+**   *pnCol:   Set to the number of columns table xxx has,
+**
+**   *pnStr:   Set to the total amount of space required to store a copy
+**             of each columns name, including the nul-terminator.
+**
+**   *pazCol:  Set to point to an array of *pnCol strings. Each string is
+**             the name of the corresponding column in table xxx. The array
+**             and its contents are allocated using a single allocation. It
+**             is the responsibility of the caller to free this allocation
+**             by eventually passing the *pazCol value to sqlite3_free().
+**
+** If the table cannot be found, an error code is returned and the output
+** variables are undefined. Or, if an OOM is encountered, SQLITE_NOMEM is
+** returned (and the output variables are undefined).
+*/
+static int fts3ContentColumns(
+  sqlite3 *db,                    /* Database handle */
+  const char *zDb,                /* Name of db (i.e. "main", "temp" etc.) */
+  const char *zTbl,               /* Name of content table */
+  const char ***pazCol,           /* OUT: Malloc'd array of column names */
+  int *pnCol,                     /* OUT: Size of array *pazCol */
+  int *pnStr                      /* OUT: Bytes of string content */
+){
+  int rc = SQLITE_OK;             /* Return code */
+  char *zSql;                     /* "SELECT *" statement on zTbl */  
+  sqlite3_stmt *pStmt = 0;        /* Compiled version of zSql */
+
+  zSql = sqlite3_mprintf("SELECT * FROM %Q.%Q", zDb, zTbl);
+  if( !zSql ){
+    rc = SQLITE_NOMEM;
+  }else{
+    rc = sqlite3_prepare(db, zSql, -1, &pStmt, 0);
+  }
+  sqlite3_free(zSql);
+
+  if( rc==SQLITE_OK ){
+    const char **azCol;           /* Output array */
+    int nStr = 0;                 /* Size of all column names (incl. 0x00) */
+    int nCol;                     /* Number of table columns */
+    int i;                        /* Used to iterate through columns */
+
+    /* Loop through the returned columns. Set nStr to the number of bytes of
+    ** space required to store a copy of each column name, including the
+    ** nul-terminator byte.  */
+    nCol = sqlite3_column_count(pStmt);
+    for(i=0; i<nCol; i++){
+      const char *zCol = sqlite3_column_name(pStmt, i);
+      nStr += strlen(zCol) + 1;
+    }
+
+    /* Allocate and populate the array to return. */
+    azCol = (const char **)sqlite3_malloc(sizeof(char *) * nCol + nStr);
+    if( azCol==0 ){
+      rc = SQLITE_NOMEM;
+    }else{
+      char *p = (char *)&azCol[nCol];
+      for(i=0; i<nCol; i++){
+        const char *zCol = sqlite3_column_name(pStmt, i);
+        int n = strlen(zCol)+1;
+        memcpy(p, zCol, n);
+        azCol[i] = p;
+        p += n;
+      }
+    }
+    sqlite3_finalize(pStmt);
+
+    /* Set the output variables. */
+    *pnCol = nCol;
+    *pnStr = nStr;
+    *pazCol = azCol;
+  }
+
+  return rc;
+}
+
 /*
 ** This function is the implementation of both the xConnect and xCreate
 ** methods of the FTS3 virtual table.
@@ -908,8 +1047,7 @@ static int fts3InitVtab(
   sqlite3_tokenizer *pTokenizer = 0;        /* Tokenizer for this table */
 
   int nIndex;                     /* Size of aIndex[] array */
-  struct Fts3Index *aIndex;       /* Array of indexes for this table */
-  struct Fts3Index *aFree = 0;    /* Free this before returning */
+  struct Fts3Index *aIndex = 0;   /* Array of indexes for this table */
 
   /* The results of parsing supported FTS4 key=value options: */
   int bNoDocsize = 0;             /* True to omit %_docsize table */
@@ -917,6 +1055,7 @@ static int fts3InitVtab(
   char *zPrefix = 0;              /* Prefix parameter value (or NULL) */
   char *zCompress = 0;            /* compress=? parameter (or NULL) */
   char *zUncompress = 0;          /* uncompress=? parameter (or NULL) */
+  char *zContent = 0;             /* content=? parameter (or NULL) */
 
   assert( strlen(argv[0])==4 );
   assert( (sqlite3_strnicmp(argv[0], "fts4", 4)==0 && isFts4)
@@ -960,13 +1099,13 @@ static int fts3InitVtab(
       struct Fts4Option {
         const char *zOpt;
         int nOpt;
-        char **pzVar;
       } aFts4Opt[] = {
-        { "matchinfo",   9, 0 },            /* 0 -> MATCHINFO */
-        { "prefix",      6, 0 },            /* 1 -> PREFIX */
-        { "compress",    8, 0 },            /* 2 -> COMPRESS */
-        { "uncompress", 10, 0 },            /* 3 -> UNCOMPRESS */
-        { "order",       5, 0 }             /* 4 -> ORDER */
+        { "matchinfo",   9 },     /* 0 -> MATCHINFO */
+        { "prefix",      6 },     /* 1 -> PREFIX */
+        { "compress",    8 },     /* 2 -> COMPRESS */
+        { "uncompress", 10 },     /* 3 -> UNCOMPRESS */
+        { "order",       5 },     /* 4 -> ORDER */
+        { "content",     7 }      /* 5 -> CONTENT */
       };
 
       int iOpt;
@@ -1012,13 +1151,20 @@ static int fts3InitVtab(
 
             case 4:               /* ORDER */
               if( (strlen(zVal)!=3 || sqlite3_strnicmp(zVal, "asc", 3)) 
-               && (strlen(zVal)!=4 || sqlite3_strnicmp(zVal, "desc", 3)) 
+               && (strlen(zVal)!=4 || sqlite3_strnicmp(zVal, "desc", 4)) 
               ){
                 *pzErr = sqlite3_mprintf("unrecognized order: %s", zVal);
                 rc = SQLITE_ERROR;
               }
               bDescIdx = (zVal[0]=='d' || zVal[0]=='D');
               break;
+
+            default:              /* CONTENT */
+              assert( iOpt==5 );
+              sqlite3_free(zUncompress);
+              zContent = zVal;
+              zVal = 0;
+              break;
           }
         }
         sqlite3_free(zVal);
@@ -1031,6 +1177,26 @@ static int fts3InitVtab(
       aCol[nCol++] = z;
     }
   }
+
+  /* If a content=xxx option was specified, the following:
+  **
+  **   1. Ignore any compress= and uncompress= options.
+  **
+  **   2. If no column names were specified as part of the CREATE VIRTUAL
+  **      TABLE statement, use all columns from the content table.
+  */
+  if( rc==SQLITE_OK && zContent ){
+    sqlite3_free(zCompress); 
+    sqlite3_free(zUncompress); 
+    zCompress = 0;
+    zUncompress = 0;
+    if( nCol==0 ){
+      sqlite3_free((void*)aCol); 
+      aCol = 0;
+      rc = fts3ContentColumns(db, argv[1], zContent, &aCol, &nCol, &nString);
+    }
+    assert( rc!=SQLITE_OK || nCol>0 );
+  }
   if( rc!=SQLITE_OK ) goto fts3_init_out;
 
   if( nCol==0 ){
@@ -1046,7 +1212,7 @@ static int fts3InitVtab(
   }
   assert( pTokenizer );
 
-  rc = fts3PrefixParameter(zPrefix, &nIndex, &aIndex, &aFree);
+  rc = fts3PrefixParameter(zPrefix, &nIndex, &aIndex);
   if( rc==SQLITE_ERROR ){
     assert( zPrefix );
     *pzErr = sqlite3_mprintf("error parsing prefix parameter: %s", zPrefix);
@@ -1075,6 +1241,8 @@ static int fts3InitVtab(
   p->bHasDocsize = (isFts4 && bNoDocsize==0);
   p->bHasStat = isFts4;
   p->bDescIdx = bDescIdx;
+  p->zContentTbl = zContent;
+  zContent = 0;
   TESTONLY( p->inTransaction = -1 );
   TESTONLY( p->mxSavepoint = -1 );
 
@@ -1133,9 +1301,10 @@ static int fts3InitVtab(
 
 fts3_init_out:
   sqlite3_free(zPrefix);
-  sqlite3_free(aFree);
+  sqlite3_free(aIndex);
   sqlite3_free(zCompress);
   sqlite3_free(zUncompress);
+  sqlite3_free(zContent);
   sqlite3_free((void *)aCol);
   if( rc!=SQLITE_OK ){
     if( p ){
@@ -1287,35 +1456,64 @@ static int fts3CloseMethod(sqlite3_vtab_cursor *pCursor){
   return SQLITE_OK;
 }
 
+/*
+** If pCsr->pStmt has not been prepared (i.e. if pCsr->pStmt==0), then
+** compose and prepare an SQL statement of the form:
+**
+**    "SELECT <columns> FROM %_content WHERE rowid = ?"
+**
+** (or the equivalent for a content=xxx table) and set pCsr->pStmt to
+** it. If an error occurs, return an SQLite error code.
+**
+** Otherwise, set *ppStmt to point to pCsr->pStmt and return SQLITE_OK.
+*/
+static int fts3CursorSeekStmt(Fts3Cursor *pCsr, sqlite3_stmt **ppStmt){
+  int rc = SQLITE_OK;
+  if( pCsr->pStmt==0 ){
+    Fts3Table *p = (Fts3Table *)pCsr->base.pVtab;
+    char *zSql;
+    zSql = sqlite3_mprintf("SELECT %s WHERE rowid = ?", p->zReadExprlist);
+    if( !zSql ) return SQLITE_NOMEM;
+    rc = sqlite3_prepare_v2(p->db, zSql, -1, &pCsr->pStmt, 0);
+    sqlite3_free(zSql);
+  }
+  *ppStmt = pCsr->pStmt;
+  return rc;
+}
+
 /*
 ** Position the pCsr->pStmt statement so that it is on the row
 ** of the %_content table that contains the last match.  Return
 ** SQLITE_OK on success.  
 */
 static int fts3CursorSeek(sqlite3_context *pContext, Fts3Cursor *pCsr){
+  int rc = SQLITE_OK;
   if( pCsr->isRequireSeek ){
-    sqlite3_bind_int64(pCsr->pStmt, 1, pCsr->iPrevId);
-    pCsr->isRequireSeek = 0;
-    if( SQLITE_ROW==sqlite3_step(pCsr->pStmt) ){
-      return SQLITE_OK;
-    }else{
-      int rc = sqlite3_reset(pCsr->pStmt);
-      if( rc==SQLITE_OK ){
-        /* If no row was found and no error has occured, then the %_content
-        ** table is missing a row that is present in the full-text index.
-        ** The data structures are corrupt.
-        */
-        rc = SQLITE_CORRUPT_VTAB;
+    sqlite3_stmt *pStmt = 0;
+
+    rc = fts3CursorSeekStmt(pCsr, &pStmt);
+    if( rc==SQLITE_OK ){
+      sqlite3_bind_int64(pCsr->pStmt, 1, pCsr->iPrevId);
+      pCsr->isRequireSeek = 0;
+      if( SQLITE_ROW==sqlite3_step(pCsr->pStmt) ){
+        return SQLITE_OK;
+      }else{
+        rc = sqlite3_reset(pCsr->pStmt);
+        if( rc==SQLITE_OK && ((Fts3Table *)pCsr->base.pVtab)->zContentTbl==0 ){
+          /* If no row was found and no error has occured, then the %_content
+          ** table is missing a row that is present in the full-text index.
+          ** The data structures are corrupt.  */
+          rc = FTS_CORRUPT_VTAB;
+          pCsr->isEof = 1;
+        }
       }
-      pCsr->isEof = 1;
-      if( pContext ){
-        sqlite3_result_error_code(pContext, rc);
-      }
-      return rc;
     }
-  }else{
-    return SQLITE_OK;
   }
+
+  if( rc!=SQLITE_OK && pContext ){
+    sqlite3_result_error_code(pContext, rc);
+  }
+  return rc;
 }
 
 /*
@@ -1365,7 +1563,7 @@ static int fts3ScanInteriorNode(
   zCsr += sqlite3Fts3GetVarint(zCsr, &iChild);
   zCsr += sqlite3Fts3GetVarint(zCsr, &iChild);
   if( zCsr>zEnd ){
-    return SQLITE_CORRUPT_VTAB;
+    return FTS_CORRUPT_VTAB;
   }
   
   while( zCsr<zEnd && (piFirst || piLast) ){
@@ -1383,7 +1581,7 @@ static int fts3ScanInteriorNode(
     zCsr += sqlite3Fts3GetVarint32(zCsr, &nSuffix);
     
     if( nPrefix<0 || nSuffix<0 || &zCsr[nSuffix]>zEnd ){
-      rc = SQLITE_CORRUPT_VTAB;
+      rc = FTS_CORRUPT_VTAB;
       goto finish_scan;
     }
     if( nPrefix+nSuffix>nAlloc ){
@@ -1396,6 +1594,7 @@ static int fts3ScanInteriorNode(
       }
       zBuffer = zNew;
     }
+    assert( zBuffer );
     memcpy(&zBuffer[nPrefix], zCsr, nSuffix);
     nBuffer = nPrefix + nSuffix;
     zCsr += nSuffix;
@@ -1724,8 +1923,6 @@ static void fts3PoslistMerge(
 }
 
 /*
-** nToken==1 searches for adjacent positions.
-**
 ** This function is used to merge two position lists into one. When it is
 ** called, *pp1 and *pp2 must both point to position lists. A position-list is
 ** the part of a doclist that follows each document id. For example, if a row
@@ -1745,6 +1942,8 @@ static void fts3PoslistMerge(
 ** *pp1 so that (pos(*pp2)>pos(*pp1) && pos(*pp2)-pos(*pp1)<=nToken). i.e.
 ** when the *pp1 token appears before the *pp2 token, but not more than nToken
 ** slots before it.
+**
+** e.g. nToken==1 searches for adjacent positions.
 */
 static int fts3PoslistPhraseMerge(
   char **pp,                      /* IN/OUT: Preallocated output buffer */
@@ -1754,7 +1953,7 @@ static int fts3PoslistPhraseMerge(
   char **pp1,                     /* IN/OUT: Left input list */
   char **pp2                      /* IN/OUT: Right input list */
 ){
-  char *p = (pp ? *pp : 0);
+  char *p = *pp;
   char *p1 = *pp1;
   char *p2 = *pp2;
   int iCol1 = 0;
@@ -1763,7 +1962,7 @@ static int fts3PoslistPhraseMerge(
   /* Never set both isSaveLeft and isExact for the same invocation. */
   assert( isSaveLeft==0 || isExact==0 );
 
-  assert( *p1!=0 && *p2!=0 );
+  assert( p!=0 && *p1!=0 && *p2!=0 );
   if( *p1==POS_COLUMN ){ 
     p1++;
     p1 += sqlite3Fts3GetVarint32(p1, &iCol1);
@@ -1780,7 +1979,7 @@ static int fts3PoslistPhraseMerge(
       sqlite3_int64 iPos1 = 0;
       sqlite3_int64 iPos2 = 0;
 
-      if( pp && iCol1 ){
+      if( iCol1 ){
         *p++ = POS_COLUMN;
         p += sqlite3Fts3PutVarint(p, iCol1);
       }
@@ -1795,16 +1994,10 @@ static int fts3PoslistPhraseMerge(
          || (isExact==0 && iPos2>iPos1 && iPos2<=iPos1+nToken) 
         ){
           sqlite3_int64 iSave;
-          if( !pp ){
-            fts3PoslistCopy(0, &p2);
-            fts3PoslistCopy(0, &p1);
-            *pp1 = p1;
-            *pp2 = p2;
-            return 1;
-          }
           iSave = isSaveLeft ? iPos1 : iPos2;
           fts3PutDeltaVarint(&p, &iPrev, iSave+2); iPrev -= 2;
           pSave = 0;
+          assert( p );
         }
         if( (!isSaveLeft && iPos2<=(iPos1+nToken)) || iPos2<=iPos1 ){
           if( (*p2&0xFE)==0 ) break;
@@ -1853,7 +2046,7 @@ static int fts3PoslistPhraseMerge(
   fts3PoslistCopy(0, &p1);
   *pp1 = p1;
   *pp2 = p2;
-  if( !pp || *pp==p ){
+  if( *pp==p ){
     return 0;
   }
   *p++ = 0x00;
@@ -1911,22 +2104,34 @@ static int fts3PoslistNearMerge(
 }
 
 /* 
-** A pointer to an instance of this structure is used as the context 
-** argument to sqlite3Fts3SegReaderIterate()
+** An instance of this function is used to merge together the (potentially
+** large number of) doclists for each term that matches a prefix query.
+** See function fts3TermSelectMerge() for details.
 */
 typedef struct TermSelect TermSelect;
 struct TermSelect {
-  int isReqPos;
-  char *aaOutput[16];             /* Malloc'd output buffer */
-  int anOutput[16];               /* Size of output in bytes */
+  char *aaOutput[16];             /* Malloc'd output buffers */
+  int anOutput[16];               /* Size each output buffer in bytes */
 };
 
-
+/*
+** This function is used to read a single varint from a buffer. Parameter
+** pEnd points 1 byte past the end of the buffer. When this function is
+** called, if *pp points to pEnd or greater, then the end of the buffer
+** has been reached. In this case *pp is set to 0 and the function returns.
+**
+** If *pp does not point to or past pEnd, then a single varint is read
+** from *pp. *pp is then set to point 1 byte past the end of the read varint.
+**
+** If bDescIdx is false, the value read is added to *pVal before returning.
+** If it is true, the value read is subtracted from *pVal before this 
+** function returns.
+*/
 static void fts3GetDeltaVarint3(
-  char **pp, 
-  char *pEnd, 
-  int bDescIdx,
-  sqlite3_int64 *pVal
+  char **pp,                      /* IN/OUT: Point to read varint from */
+  char *pEnd,                     /* End of buffer */
+  int bDescIdx,                   /* True if docids are descending */
+  sqlite3_int64 *pVal             /* IN/OUT: Integer value */
 ){
   if( *pp>=pEnd ){
     *pp = 0;
@@ -1941,6 +2146,21 @@ static void fts3GetDeltaVarint3(
   }
 }
 
+/*
+** This function is used to write a single varint to a buffer. The varint
+** is written to *pp. Before returning, *pp is set to point 1 byte past the
+** end of the value written.
+**
+** If *pbFirst is zero when this function is called, the value written to
+** the buffer is that of parameter iVal. 
+**
+** If *pbFirst is non-zero when this function is called, then the value 
+** written is either (iVal-*piPrev) (if bDescIdx is zero) or (*piPrev-iVal)
+** (if bDescIdx is non-zero).
+**
+** Before returning, this function always sets *pbFirst to 1 and *piPrev
+** to the value of parameter iVal.
+*/
 static void fts3PutDeltaVarint3(
   char **pp,                      /* IN/OUT: Output pointer */
   int bDescIdx,                   /* True for descending docids */
@@ -1961,10 +2181,34 @@ static void fts3PutDeltaVarint3(
   *pbFirst = 1;
 }
 
-#define COMPARE_DOCID(i1, i2) ((bDescIdx?-1:1) * (i1-i2))
 
+/*
+** This macro is used by various functions that merge doclists. The two
+** arguments are 64-bit docid values. If the value of the stack variable
+** bDescDoclist is 0 when this macro is invoked, then it returns (i1-i2). 
+** Otherwise, (i2-i1).
+**
+** Using this makes it easier to write code that can merge doclists that are
+** sorted in either ascending or descending order.
+*/
+#define DOCID_CMP(i1, i2) ((bDescDoclist?-1:1) * (i1-i2))
+
+/*
+** This function does an "OR" merge of two doclists (output contains all
+** positions contained in either argument doclist). If the docids in the 
+** input doclists are sorted in ascending order, parameter bDescDoclist
+** should be false. If they are sorted in ascending order, it should be
+** passed a non-zero value.
+**
+** If no error occurs, *paOut is set to point at an sqlite3_malloc'd buffer
+** containing the output doclist and SQLITE_OK is returned. In this case
+** *pnOut is set to the number of bytes in the output doclist.
+**
+** If an error occurs, an SQLite error code is returned. The output values
+** are undefined in this case.
+*/
 static int fts3DoclistOrMerge(
-  int bDescIdx,                   /* True if arguments are desc */
+  int bDescDoclist,               /* True if arguments are desc */
   char *a1, int n1,               /* First doclist */
   char *a2, int n2,               /* Second doclist */
   char **paOut, int *pnOut        /* OUT: Malloc'd doclist */
@@ -1982,38 +2226,81 @@ static int fts3DoclistOrMerge(
 
   *paOut = 0;
   *pnOut = 0;
-  aOut = sqlite3_malloc(n1+n2);
+
+  /* Allocate space for the output. Both the input and output doclists
+  ** are delta encoded. If they are in ascending order (bDescDoclist==0),
+  ** then the first docid in each list is simply encoded as a varint. For
+  ** each subsequent docid, the varint stored is the difference between the
+  ** current and previous docid (a positive number - since the list is in
+  ** ascending order).
+  **
+  ** The first docid written to the output is therefore encoded using the 
+  ** same number of bytes as it is in whichever of the input lists it is
+  ** read from. And each subsequent docid read from the same input list 
+  ** consumes either the same or less bytes as it did in the input (since
+  ** the difference between it and the previous value in the output must
+  ** be a positive value less than or equal to the delta value read from 
+  ** the input list). The same argument applies to all but the first docid
+  ** read from the 'other' list. And to the contents of all position lists
+  ** that will be copied and merged from the input to the output.
+  **
+  ** However, if the first docid copied to the output is a negative number,
+  ** then the encoding of the first docid from the 'other' input list may
+  ** be larger in the output than it was in the input (since the delta value
+  ** may be a larger positive integer than the actual docid).
+  **
+  ** The space required to store the output is therefore the sum of the
+  ** sizes of the two inputs, plus enough space for exactly one of the input
+  ** docids to grow. 
+  **
+  ** A symetric argument may be made if the doclists are in descending 
+  ** order.
+  */
+  aOut = sqlite3_malloc(n1+n2+FTS3_VARINT_MAX-1);
   if( !aOut ) return SQLITE_NOMEM;
 
   p = aOut;
   fts3GetDeltaVarint3(&p1, pEnd1, 0, &i1);
   fts3GetDeltaVarint3(&p2, pEnd2, 0, &i2);
   while( p1 || p2 ){
-    sqlite3_int64 iDiff = COMPARE_DOCID(i1, i2);
+    sqlite3_int64 iDiff = DOCID_CMP(i1, i2);
 
     if( p2 && p1 && iDiff==0 ){
-      fts3PutDeltaVarint3(&p, bDescIdx, &iPrev, &bFirstOut, i1);
+      fts3PutDeltaVarint3(&p, bDescDoclist, &iPrev, &bFirstOut, i1);
       fts3PoslistMerge(&p, &p1, &p2);
-      fts3GetDeltaVarint3(&p1, pEnd1, bDescIdx, &i1);
-      fts3GetDeltaVarint3(&p2, pEnd2, bDescIdx, &i2);
+      fts3GetDeltaVarint3(&p1, pEnd1, bDescDoclist, &i1);
+      fts3GetDeltaVarint3(&p2, pEnd2, bDescDoclist, &i2);
     }else if( !p2 || (p1 && iDiff<0) ){
-      fts3PutDeltaVarint3(&p, bDescIdx, &iPrev, &bFirstOut, i1);
+      fts3PutDeltaVarint3(&p, bDescDoclist, &iPrev, &bFirstOut, i1);
       fts3PoslistCopy(&p, &p1);
-      fts3GetDeltaVarint3(&p1, pEnd1, bDescIdx, &i1);
+      fts3GetDeltaVarint3(&p1, pEnd1, bDescDoclist, &i1);
     }else{
-      fts3PutDeltaVarint3(&p, bDescIdx, &iPrev, &bFirstOut, i2);
+      fts3PutDeltaVarint3(&p, bDescDoclist, &iPrev, &bFirstOut, i2);
       fts3PoslistCopy(&p, &p2);
-      fts3GetDeltaVarint3(&p2, pEnd2, bDescIdx, &i2);
+      fts3GetDeltaVarint3(&p2, pEnd2, bDescDoclist, &i2);
     }
   }
 
   *paOut = aOut;
   *pnOut = (p-aOut);
+  assert( *pnOut<=n1+n2+FTS3_VARINT_MAX-1 );
   return SQLITE_OK;
 }
 
+/*
+** This function does a "phrase" merge of two doclists. In a phrase merge,
+** the output contains a copy of each position from the right-hand input
+** doclist for which there is a position in the left-hand input doclist
+** exactly nDist tokens before it.
+**
+** If the docids in the input doclists are sorted in ascending order,
+** parameter bDescDoclist should be false. If they are sorted in ascending 
+** order, it should be passed a non-zero value.
+**
+** The right-hand input doclist is overwritten by this function.
+*/
 static void fts3DoclistPhraseMerge(
-  int bDescIdx,                   /* True if arguments are desc */
+  int bDescDoclist,               /* True if arguments are desc */
   int nDist,                      /* Distance from left to right (1=adjacent) */
   char *aLeft, int nLeft,         /* Left doclist */
   char *aRight, int *pnRight      /* IN/OUT: Right/output doclist */
@@ -2036,32 +2323,82 @@ static void fts3DoclistPhraseMerge(
   fts3GetDeltaVarint3(&p2, pEnd2, 0, &i2);
 
   while( p1 && p2 ){
-    sqlite3_int64 iDiff = COMPARE_DOCID(i1, i2);
+    sqlite3_int64 iDiff = DOCID_CMP(i1, i2);
     if( iDiff==0 ){
       char *pSave = p;
       sqlite3_int64 iPrevSave = iPrev;
       int bFirstOutSave = bFirstOut;
 
-      fts3PutDeltaVarint3(&p, bDescIdx, &iPrev, &bFirstOut, i1);
+      fts3PutDeltaVarint3(&p, bDescDoclist, &iPrev, &bFirstOut, i1);
       if( 0==fts3PoslistPhraseMerge(&p, nDist, 0, 1, &p1, &p2) ){
         p = pSave;
         iPrev = iPrevSave;
         bFirstOut = bFirstOutSave;
       }
-      fts3GetDeltaVarint3(&p1, pEnd1, bDescIdx, &i1);
-      fts3GetDeltaVarint3(&p2, pEnd2, bDescIdx, &i2);
+      fts3GetDeltaVarint3(&p1, pEnd1, bDescDoclist, &i1);
+      fts3GetDeltaVarint3(&p2, pEnd2, bDescDoclist, &i2);
     }else if( iDiff<0 ){
       fts3PoslistCopy(0, &p1);
-      fts3GetDeltaVarint3(&p1, pEnd1, bDescIdx, &i1);
+      fts3GetDeltaVarint3(&p1, pEnd1, bDescDoclist, &i1);
     }else{
       fts3PoslistCopy(0, &p2);
-      fts3GetDeltaVarint3(&p2, pEnd2, bDescIdx, &i2);
+      fts3GetDeltaVarint3(&p2, pEnd2, bDescDoclist, &i2);
     }
   }
 
   *pnRight = p - aOut;
 }
 
+/*
+** Argument pList points to a position list nList bytes in size. This
+** function checks to see if the position list contains any entries for
+** a token in position 0 (of any column). If so, it writes argument iDelta
+** to the output buffer pOut, followed by a position list consisting only
+** of the entries from pList at position 0, and terminated by an 0x00 byte.
+** The value returned is the number of bytes written to pOut (if any).
+*/
+int sqlite3Fts3FirstFilter(
+  sqlite3_int64 iDelta,           /* Varint that may be written to pOut */
+  char *pList,                    /* Position list (no 0x00 term) */
+  int nList,                      /* Size of pList in bytes */
+  char *pOut                      /* Write output here */
+){
+  int nOut = 0;
+  int bWritten = 0;               /* True once iDelta has been written */
+  char *p = pList;
+  char *pEnd = &pList[nList];
+
+  if( *p!=0x01 ){
+    if( *p==0x02 ){
+      nOut += sqlite3Fts3PutVarint(&pOut[nOut], iDelta);
+      pOut[nOut++] = 0x02;
+      bWritten = 1;
+    }
+    fts3ColumnlistCopy(0, &p);
+  }
+
+  while( p<pEnd && *p==0x01 ){
+    sqlite3_int64 iCol;
+    p++;
+    p += sqlite3Fts3GetVarint(p, &iCol);
+    if( *p==0x02 ){
+      if( bWritten==0 ){
+        nOut += sqlite3Fts3PutVarint(&pOut[nOut], iDelta);
+        bWritten = 1;
+      }
+      pOut[nOut++] = 0x01;
+      nOut += sqlite3Fts3PutVarint(&pOut[nOut], iCol);
+      pOut[nOut++] = 0x02;
+    }
+    fts3ColumnlistCopy(0, &p);
+  }
+  if( bWritten ){
+    pOut[nOut++] = 0x00;
+  }
+
+  return nOut;
+}
+
 
 /*
 ** Merge all doclists in the TermSelect.aaOutput[] array into a single
@@ -2072,7 +2409,7 @@ static void fts3DoclistPhraseMerge(
 ** the responsibility of the caller to free any doclists left in the
 ** TermSelect.aaOutput[] array.
 */
-static int fts3TermSelectMerge(Fts3Table *p, TermSelect *pTS){
+static int fts3TermSelectFinishMerge(Fts3Table *p, TermSelect *pTS){
   char *aOut = 0;
   int nOut = 0;
   int i;
@@ -2113,24 +2450,25 @@ static int fts3TermSelectMerge(Fts3Table *p, TermSelect *pTS){
 }
 
 /*
-** This function is used as the sqlite3Fts3SegReaderIterate() callback when
-** querying the full-text index for a doclist associated with a term or
-** term-prefix.
+** Merge the doclist aDoclist/nDoclist into the TermSelect object passed
+** as the first argument. The merge is an "OR" merge (see function
+** fts3DoclistOrMerge() for details).
+**
+** This function is called with the doclist for each term that matches
+** a queried prefix. It merges all these doclists into one, the doclist
+** for the specified prefix. Since there can be a very large number of
+** doclists to merge, the merging is done pair-wise using the TermSelect
+** object.
+**
+** This function returns SQLITE_OK if the merge is successful, or an
+** SQLite error code (SQLITE_NOMEM) if an error occurs.
 */
-static int fts3TermSelectCb(
-  Fts3Table *p,                   /* Virtual table object */
-  void *pContext,                 /* Pointer to TermSelect structure */
-  char *zTerm,
-  int nTerm,
-  char *aDoclist,
-  int nDoclist
+static int fts3TermSelectMerge(
+  Fts3Table *p,                   /* FTS table handle */
+  TermSelect *pTS,                /* TermSelect object to merge into */
+  char *aDoclist,                 /* Pointer to doclist */
+  int nDoclist                    /* Size of aDoclist in bytes */
 ){
-  TermSelect *pTS = (TermSelect *)pContext;
-
-  UNUSED_PARAMETER(p);
-  UNUSED_PARAMETER(zTerm);
-  UNUSED_PARAMETER(nTerm);
-
   if( pTS->aaOutput[0]==0 ){
     /* If this is the first term selected, copy the doclist to the output
     ** buffer using memcpy(). */
@@ -2201,6 +2539,13 @@ static int fts3SegReaderCursorAppend(
   return SQLITE_OK;
 }
 
+/*
+** Add seg-reader objects to the Fts3MultiSegReader object passed as the
+** 8th argument.
+**
+** This function returns SQLITE_OK if successful, or an SQLite error code
+** otherwise.
+*/
 static int fts3SegReaderCursor(
   Fts3Table *p,                   /* FTS3 table handle */
   int iIndex,                     /* Index to search (from 0 to p->nIndex-1) */
@@ -2209,11 +2554,11 @@ static int fts3SegReaderCursor(
   int nTerm,                      /* Size of zTerm in bytes */
   int isPrefix,                   /* True for a prefix search */
   int isScan,                     /* True to scan from zTerm to EOF */
-  Fts3MultiSegReader *pCsr       /* Cursor object to populate */
+  Fts3MultiSegReader *pCsr        /* Cursor object to populate */
 ){
-  int rc = SQLITE_OK;
-  int rc2;
-  sqlite3_stmt *pStmt = 0;
+  int rc = SQLITE_OK;             /* Error code */
+  sqlite3_stmt *pStmt = 0;        /* Statement to iterate through segments */
+  int rc2;                        /* Result of sqlite3_reset() */
 
   /* If iLevel is less than 0 and this is not a scan, include a seg-reader 
   ** for the pending-terms. If this is a scan, then this call must be being
@@ -2302,24 +2647,42 @@ int sqlite3Fts3SegReaderCursor(
   );
 }
 
+/*
+** In addition to its current configuration, have the Fts3MultiSegReader
+** passed as the 4th argument also scan the doclist for term zTerm/nTerm.
+**
+** SQLITE_OK is returned if no error occurs, otherwise an SQLite error code.
+*/
 static int fts3SegReaderCursorAddZero(
-  Fts3Table *p,
-  const char *zTerm,
-  int nTerm,
-  Fts3MultiSegReader *pCsr
+  Fts3Table *p,                   /* FTS virtual table handle */
+  const char *zTerm,              /* Term to scan doclist of */
+  int nTerm,                      /* Number of bytes in zTerm */
+  Fts3MultiSegReader *pCsr        /* Fts3MultiSegReader to modify */
 ){
   return fts3SegReaderCursor(p, 0, FTS3_SEGCURSOR_ALL, zTerm, nTerm, 0, 0,pCsr);
 }
 
-
-int sqlite3Fts3TermSegReaderCursor(
+/*
+** Open an Fts3MultiSegReader to scan the doclist for term zTerm/nTerm. Or,
+** if isPrefix is true, to scan the doclist for all terms for which 
+** zTerm/nTerm is a prefix. If successful, return SQLITE_OK and write
+** a pointer to the new Fts3MultiSegReader to *ppSegcsr. Otherwise, return
+** an SQLite error code.
+**
+** It is the responsibility of the caller to free this object by eventually
+** passing it to fts3SegReaderCursorFree() 
+**
+** SQLITE_OK is returned if no error occurs, otherwise an SQLite error code.
+** Output parameter *ppSegcsr is set to 0 if an error occurs.
+*/
+static int fts3TermSegReaderCursor(
   Fts3Cursor *pCsr,               /* Virtual table cursor handle */
   const char *zTerm,              /* Term to query for */
   int nTerm,                      /* Size of zTerm in bytes */
   int isPrefix,                   /* True for a prefix search */
   Fts3MultiSegReader **ppSegcsr   /* OUT: Allocated seg-reader cursor */
 ){
-  Fts3MultiSegReader *pSegcsr;   /* Object to allocate and return */
+  Fts3MultiSegReader *pSegcsr;    /* Object to allocate and return */
   int rc = SQLITE_NOMEM;          /* Return code */
 
   pSegcsr = sqlite3_malloc(sizeof(Fts3MultiSegReader));
@@ -2363,6 +2726,9 @@ int sqlite3Fts3TermSegReaderCursor(
   return rc;
 }
 
+/*
+** Free an Fts3MultiSegReader allocated by fts3TermSegReaderCursor().
+*/
 static void fts3SegReaderCursorFree(Fts3MultiSegReader *pSegcsr){
   sqlite3Fts3SegReaderFinish(pSegcsr);
   sqlite3_free(pSegcsr);
@@ -2370,35 +2736,26 @@ static void fts3SegReaderCursorFree(Fts3MultiSegReader *pSegcsr){
 
 /*
 ** This function retreives the doclist for the specified term (or term
-** prefix) from the database. 
-**
-** The returned doclist may be in one of two formats, depending on the 
-** value of parameter isReqPos. If isReqPos is zero, then the doclist is
-** a sorted list of delta-compressed docids (a bare doclist). If isReqPos
-** is non-zero, then the returned list is in the same format as is stored 
-** in the database without the found length specifier at the start of on-disk
-** doclists.
+** prefix) from the database.
 */
 static int fts3TermSelect(
   Fts3Table *p,                   /* Virtual table handle */
   Fts3PhraseToken *pTok,          /* Token to query for */
   int iColumn,                    /* Column to query (or -ve for all columns) */
-  int isReqPos,                   /* True to include position lists in output */
   int *pnOut,                     /* OUT: Size of buffer at *ppOut */
   char **ppOut                    /* OUT: Malloced result buffer */
 ){
   int rc;                         /* Return code */
-  Fts3MultiSegReader *pSegcsr;   /* Seg-reader cursor for this term */
-  TermSelect tsc;                 /* Context object for fts3TermSelectCb() */
+  Fts3MultiSegReader *pSegcsr;    /* Seg-reader cursor for this term */
+  TermSelect tsc;                 /* Object for pair-wise doclist merging */
   Fts3SegFilter filter;           /* Segment term filter configuration */
 
   pSegcsr = pTok->pSegcsr;
   memset(&tsc, 0, sizeof(TermSelect));
-  tsc.isReqPos = isReqPos;
 
-  filter.flags = FTS3_SEGMENT_IGNORE_EMPTY 
+  filter.flags = FTS3_SEGMENT_IGNORE_EMPTY | FTS3_SEGMENT_REQUIRE_POS
         | (pTok->isPrefix ? FTS3_SEGMENT_PREFIX : 0)
-        | (isReqPos ? FTS3_SEGMENT_REQUIRE_POS : 0)
+        | (pTok->bFirst ? FTS3_SEGMENT_FIRST : 0)
         | (iColumn<p->nColumn ? FTS3_SEGMENT_COLUMN_FILTER : 0);
   filter.iCol = iColumn;
   filter.zTerm = pTok->z;
@@ -2408,13 +2765,11 @@ static int fts3TermSelect(
   while( SQLITE_OK==rc
       && SQLITE_ROW==(rc = sqlite3Fts3SegReaderStep(p, pSegcsr)) 
   ){
-    rc = fts3TermSelectCb(p, (void *)&tsc, 
-        pSegcsr->zTerm, pSegcsr->nTerm, pSegcsr->aDoclist, pSegcsr->nDoclist
-    );
+    rc = fts3TermSelectMerge(p, &tsc, pSegcsr->aDoclist, pSegcsr->nDoclist);
   }
 
   if( rc==SQLITE_OK ){
-    rc = fts3TermSelectMerge(p, &tsc);
+    rc = fts3TermSelectFinishMerge(p, &tsc);
   }
   if( rc==SQLITE_OK ){
     *ppOut = tsc.aaOutput[0];
@@ -2440,24 +2795,15 @@ static int fts3TermSelect(
 ** that the doclist is simply a list of docids stored as delta encoded 
 ** varints.
 */
-static int fts3DoclistCountDocids(int isPoslist, char *aList, int nList){
+static int fts3DoclistCountDocids(char *aList, int nList){
   int nDoc = 0;                   /* Return value */
   if( aList ){
     char *aEnd = &aList[nList];   /* Pointer to one byte after EOF */
     char *p = aList;              /* Cursor */
-    if( !isPoslist ){
-      /* The number of docids in the list is the same as the number of 
-      ** varints. In FTS3 a varint consists of a single byte with the 0x80 
-      ** bit cleared and zero or more bytes with the 0x80 bit set. So to
-      ** count the varints in the buffer, just count the number of bytes
-      ** with the 0x80 bit clear.  */
-      while( p<aEnd ) nDoc += (((*p++)&0x80)==0);
-    }else{
-      while( p<aEnd ){
-        nDoc++;
-        while( (*p++)&0x80 );     /* Skip docid varint */
-        fts3PoslistCopy(0, &p);   /* Skip over position list */
-      }
+    while( p<aEnd ){
+      nDoc++;
+      while( (*p++)&0x80 );     /* Skip docid varint */
+      fts3PoslistCopy(0, &p);   /* Skip over position list */
     }
   }
 
@@ -2487,7 +2833,7 @@ static int fts3NextMethod(sqlite3_vtab_cursor *pCursor){
       rc = SQLITE_OK;
     }
   }else{
-    rc = sqlite3Fts3EvalNext((Fts3Cursor *)pCursor);
+    rc = fts3EvalNext((Fts3Cursor *)pCursor);
   }
   assert( ((Fts3Table *)pCsr->base.pVtab)->pSegments==0 );
   return rc;
@@ -2550,8 +2896,8 @@ static int fts3FilterMethod(
       return SQLITE_NOMEM;
     }
 
-    rc = sqlite3Fts3ExprParse(p->pTokenizer, p->azColumn, p->nColumn, 
-        iCol, zQuery, -1, &pCsr->pExpr
+    rc = sqlite3Fts3ExprParse(p->pTokenizer, p->azColumn, p->bHasStat, 
+        p->nColumn, iCol, zQuery, -1, &pCsr->pExpr
     );
     if( rc!=SQLITE_OK ){
       if( rc==SQLITE_ERROR ){
@@ -2564,7 +2910,7 @@ static int fts3FilterMethod(
     rc = sqlite3Fts3ReadLock(p);
     if( rc!=SQLITE_OK ) return rc;
 
-    rc = sqlite3Fts3EvalStart(pCsr, pCsr->pExpr, 1);
+    rc = fts3EvalStart(pCsr);
 
     sqlite3Fts3SegmentsClose(p);
     if( rc!=SQLITE_OK ) return rc;
@@ -2578,23 +2924,24 @@ static int fts3FilterMethod(
   ** row by docid.
   */
   if( idxNum==FTS3_FULLSCAN_SEARCH ){
-    const char *zSort = (pCsr->bDesc ? "DESC" : "ASC");
-    const char *zTmpl = "SELECT %s FROM %Q.'%q_content' AS x ORDER BY docid %s";
-    zSql = sqlite3_mprintf(zTmpl, p->zReadExprlist, p->zDb, p->zName, zSort);
-  }else{
-    const char *zTmpl = "SELECT %s FROM %Q.'%q_content' AS x WHERE docid = ?";
-    zSql = sqlite3_mprintf(zTmpl, p->zReadExprlist, p->zDb, p->zName);
+    zSql = sqlite3_mprintf(
+        "SELECT %s ORDER BY rowid %s",
+        p->zReadExprlist, (pCsr->bDesc ? "DESC" : "ASC")
+    );
+    if( zSql ){
+      rc = sqlite3_prepare_v2(p->db, zSql, -1, &pCsr->pStmt, 0);
+      sqlite3_free(zSql);
+    }else{
+      rc = SQLITE_NOMEM;
+    }
+  }else if( idxNum==FTS3_DOCID_SEARCH ){
+    rc = fts3CursorSeekStmt(pCsr, &pCsr->pStmt);
+    if( rc==SQLITE_OK ){
+      rc = sqlite3_bind_value(pCsr->pStmt, 1, apVal[0]);
+    }
   }
-  if( !zSql ) return SQLITE_NOMEM;
-  rc = sqlite3_prepare_v2(p->db, zSql, -1, &pCsr->pStmt, 0);
-  sqlite3_free(zSql);
   if( rc!=SQLITE_OK ) return rc;
 
-  if( idxNum==FTS3_DOCID_SEARCH ){
-    rc = sqlite3_bind_value(pCsr->pStmt, 1, apVal[0]);
-    if( rc!=SQLITE_OK ) return rc;
-  }
-
   return fts3NextMethod(pCursor);
 }
 
@@ -2646,7 +2993,7 @@ static int fts3ColumnMethod(
     sqlite3_result_blob(pContext, &pCsr, sizeof(pCsr), SQLITE_TRANSIENT);
   }else{
     rc = fts3CursorSeek(0, pCsr);
-    if( rc==SQLITE_OK ){
+    if( rc==SQLITE_OK && sqlite3_data_count(pCsr->pStmt)>(iCol+1) ){
       sqlite3_result_value(pContext, sqlite3_column_value(pCsr->pStmt, iCol+1));
     }
   }
@@ -2730,7 +3077,7 @@ static int fts3RollbackMethod(sqlite3_vtab *pVtab){
 */
 static void fts3ReversePoslist(char *pStart, char **ppPoslist){
   char *p = &(*ppPoslist)[-2];
-  char c;
+  char c = 0;
 
   while( p>pStart && (c=*p--)==0 );
   while( p>pStart && (*p & 0x80) | c ){ 
@@ -2939,15 +3286,22 @@ static int fts3RenameMethod(
   sqlite3 *db = p->db;            /* Database connection */
   int rc;                         /* Return Code */
 
+  /* As it happens, the pending terms table is always empty here. This is
+  ** because an "ALTER TABLE RENAME TABLE" statement inside a transaction 
+  ** always opens a savepoint transaction. And the xSavepoint() method 
+  ** flushes the pending terms table. But leave the (no-op) call to
+  ** PendingTermsFlush() in in case that changes.
+  */
+  assert( p->nPendingData==0 );
   rc = sqlite3Fts3PendingTermsFlush(p);
-  if( rc!=SQLITE_OK ){
-    return rc;
+
+  if( p->zContentTbl==0 ){
+    fts3DbExec(&rc, db,
+      "ALTER TABLE %Q.'%q_content'  RENAME TO '%q_content';",
+      p->zDb, p->zName, zName
+    );
   }
 
-  fts3DbExec(&rc, db,
-    "ALTER TABLE %Q.'%q_content'  RENAME TO '%q_content';",
-    p->zDb, p->zName, zName
-  );
   if( p->bHasDocsize ){
     fts3DbExec(&rc, db,
       "ALTER TABLE %Q.'%q_docsize'  RENAME TO '%q_docsize';",
@@ -2971,6 +3325,11 @@ static int fts3RenameMethod(
   return rc;
 }
 
+/*
+** The xSavepoint() method.
+**
+** Flush the contents of the pending-terms table to disk.
+*/
 static int fts3SavepointMethod(sqlite3_vtab *pVtab, int iSavepoint){
   UNUSED_PARAMETER(iSavepoint);
   assert( ((Fts3Table *)pVtab)->inTransaction );
@@ -2978,6 +3337,12 @@ static int fts3SavepointMethod(sqlite3_vtab *pVtab, int iSavepoint){
   TESTONLY( ((Fts3Table *)pVtab)->mxSavepoint = iSavepoint );
   return fts3SyncMethod(pVtab);
 }
+
+/*
+** The xRelease() method.
+**
+** This is a no-op.
+*/
 static int fts3ReleaseMethod(sqlite3_vtab *pVtab, int iSavepoint){
   TESTONLY( Fts3Table *p = (Fts3Table*)pVtab );
   UNUSED_PARAMETER(iSavepoint);
@@ -2987,6 +3352,12 @@ static int fts3ReleaseMethod(sqlite3_vtab *pVtab, int iSavepoint){
   TESTONLY( p->mxSavepoint = iSavepoint-1 );
   return SQLITE_OK;
 }
+
+/*
+** The xRollbackTo() method.
+**
+** Discard the contents of the pending terms table.
+*/
 static int fts3RollbackToMethod(sqlite3_vtab *pVtab, int iSavepoint){
   Fts3Table *p = (Fts3Table*)pVtab;
   UNUSED_PARAMETER(iSavepoint);
@@ -3136,18 +3507,6 @@ int sqlite3Fts3Init(sqlite3 *db){
   return rc;
 }
 
-#if !SQLITE_CORE
-int sqlite3_extension_init(
-  sqlite3 *db, 
-  char **pzErrMsg,
-  const sqlite3_api_routines *pApi
-){
-  SQLITE_EXTENSION_INIT2(pApi)
-  return sqlite3Fts3Init(db);
-}
-#endif
-
-
 /*
 ** Allocate an Fts3MultiSegReader for each token in the expression headed
 ** by pExpr. 
@@ -3164,11 +3523,11 @@ int sqlite3_extension_init(
 ** doclist and then traversed.
 */
 static void fts3EvalAllocateReaders(
-  Fts3Cursor *pCsr, 
-  Fts3Expr *pExpr, 
+  Fts3Cursor *pCsr,               /* FTS cursor handle */
+  Fts3Expr *pExpr,                /* Allocate readers for this expression */
   int *pnToken,                   /* OUT: Total number of tokens in phrase. */
   int *pnOr,                      /* OUT: Total number of OR nodes in expr. */
-  int *pRc
+  int *pRc                        /* IN/OUT: Error code */
 ){
   if( pExpr && SQLITE_OK==*pRc ){
     if( pExpr->eType==FTSQUERY_PHRASE ){
@@ -3177,7 +3536,7 @@ static void fts3EvalAllocateReaders(
       *pnToken += nToken;
       for(i=0; i<nToken; i++){
         Fts3PhraseToken *pToken = &pExpr->pPhrase->aToken[i];
-        int rc = sqlite3Fts3TermSegReaderCursor(pCsr, 
+        int rc = fts3TermSegReaderCursor(pCsr, 
             pToken->z, pToken->n, pToken->isPrefix, &pToken->pSegcsr
         );
         if( rc!=SQLITE_OK ){
@@ -3195,12 +3554,20 @@ static void fts3EvalAllocateReaders(
   }
 }
 
+/*
+** Arguments pList/nList contain the doclist for token iToken of phrase p.
+** It is merged into the main doclist stored in p->doclist.aAll/nAll.
+**
+** This function assumes that pList points to a buffer allocated using
+** sqlite3_malloc(). This function takes responsibility for eventually
+** freeing the buffer.
+*/
 static void fts3EvalPhraseMergeToken(
-  Fts3Table *pTab,
-  Fts3Phrase *p,
-  int iToken,
-  char *pList,
-  int nList
+  Fts3Table *pTab,                /* FTS Table pointer */
+  Fts3Phrase *p,                  /* Phrase to merge pList/nList into */
+  int iToken,                     /* Token pList/nList corresponds to */
+  char *pList,                    /* Pointer to doclist */
+  int nList                       /* Number of bytes in pList */
 ){
   assert( iToken!=p->iDoclistToken );
 
@@ -3249,9 +3616,15 @@ static void fts3EvalPhraseMergeToken(
   if( iToken>p->iDoclistToken ) p->iDoclistToken = iToken;
 }
 
+/*
+** Load the doclist for phrase p into p->doclist.aAll/nAll. The loaded doclist
+** does not take deferred tokens into account.
+**
+** SQLITE_OK is returned if no error occurs, otherwise an SQLite error code.
+*/
 static int fts3EvalPhraseLoad(
-  Fts3Cursor *pCsr, 
-  Fts3Phrase *p
+  Fts3Cursor *pCsr,               /* FTS Cursor handle */
+  Fts3Phrase *p                   /* Phrase object */
 ){
   Fts3Table *pTab = (Fts3Table *)pCsr->base.pVtab;
   int iToken;
@@ -3264,7 +3637,7 @@ static int fts3EvalPhraseLoad(
     if( pToken->pSegcsr ){
       int nThis = 0;
       char *pThis = 0;
-      rc = fts3TermSelect(pTab, pToken, p->iColumn, 1, &nThis, &pThis);
+      rc = fts3TermSelect(pTab, pToken, p->iColumn, &nThis, &pThis);
       if( rc==SQLITE_OK ){
         fts3EvalPhraseMergeToken(pTab, p, iToken, pThis, nThis);
       }
@@ -3275,25 +3648,32 @@ static int fts3EvalPhraseLoad(
   return rc;
 }
 
+/*
+** This function is called on each phrase after the position lists for
+** any deferred tokens have been loaded into memory. It updates the phrases
+** current position list to include only those positions that are really
+** instances of the phrase (after considering deferred tokens). If this
+** means that the phrase does not appear in the current row, doclist.pList
+** and doclist.nList are both zeroed.
+**
+** SQLITE_OK is returned if no error occurs, otherwise an SQLite error code.
+*/
 static int fts3EvalDeferredPhrase(Fts3Cursor *pCsr, Fts3Phrase *pPhrase){
-  int iToken;
-  int rc = SQLITE_OK;
-
-  int nMaxUndeferred = pPhrase->iDoclistToken;
-  char *aPoslist = 0;
-  int nPoslist = 0;
-  int iPrev = -1;
+  int iToken;                     /* Used to iterate through phrase tokens */
+  char *aPoslist = 0;             /* Position list for deferred tokens */
+  int nPoslist = 0;               /* Number of bytes in aPoslist */
+  int iPrev = -1;                 /* Token number of previous deferred token */
 
   assert( pPhrase->doclist.bFreeList==0 );
 
-  for(iToken=0; rc==SQLITE_OK && iToken<pPhrase->nToken; iToken++){
+  for(iToken=0; iToken<pPhrase->nToken; iToken++){
     Fts3PhraseToken *pToken = &pPhrase->aToken[iToken];
     Fts3DeferredToken *pDeferred = pToken->pDeferred;
 
     if( pDeferred ){
       char *pList;
       int nList;
-      rc = sqlite3Fts3DeferredTokenList(pDeferred, &pList, &nList);
+      int rc = sqlite3Fts3DeferredTokenList(pDeferred, &pList, &nList);
       if( rc!=SQLITE_OK ) return rc;
 
       if( pList==0 ){
@@ -3328,6 +3708,7 @@ static int fts3EvalDeferredPhrase(Fts3Cursor *pCsr, Fts3Phrase *pPhrase){
   }
 
   if( iPrev>=0 ){
+    int nMaxUndeferred = pPhrase->iDoclistToken;
     if( nMaxUndeferred<0 ){
       pPhrase->doclist.pList = aPoslist;
       pPhrase->doclist.nList = nPoslist;
@@ -3376,9 +3757,15 @@ static int fts3EvalDeferredPhrase(Fts3Cursor *pCsr, Fts3Phrase *pPhrase){
 ** expression to initialize the mechanism for returning rows. Once this
 ** function has been called successfully on an Fts3Phrase, it may be
 ** used with fts3EvalPhraseNext() to iterate through the matching docids.
+**
+** If parameter bOptOk is true, then the phrase may (or may not) use the
+** incremental loading strategy. Otherwise, the entire doclist is loaded into
+** memory within this call.
+**
+** SQLITE_OK is returned if no error occurs, otherwise an SQLite error code.
 */
 static int fts3EvalPhraseStart(Fts3Cursor *pCsr, int bOptOk, Fts3Phrase *p){
-  int rc;
+  int rc;                         /* Error code */
   Fts3PhraseToken *pFirst = &p->aToken[0];
   Fts3Table *pTab = (Fts3Table *)pCsr->base.pVtab;
 
@@ -3387,6 +3774,7 @@ static int fts3EvalPhraseStart(Fts3Cursor *pCsr, int bOptOk, Fts3Phrase *p){
    && p->nToken==1 
    && pFirst->pSegcsr 
    && pFirst->pSegcsr->bLookup 
+   && pFirst->bFirst==0
   ){
     /* Use the incremental approach. */
     int iCol = (p->iColumn >= pTab->nColumn ? -1 : p->iColumn);
@@ -3406,7 +3794,13 @@ static int fts3EvalPhraseStart(Fts3Cursor *pCsr, int bOptOk, Fts3Phrase *p){
 
 /*
 ** This function is used to iterate backwards (from the end to start) 
-** through doclists.
+** through doclists. It is used by this module to iterate through phrase
+** doclists in reverse and by the fts3_write.c module to iterate through
+** pending-terms lists when writing to databases with "order=desc".
+**
+** The doclist may be sorted in ascending (parameter bDescIdx==0) or 
+** descending (parameter bDescIdx==1) order of docid. Regardless, this
+** function iterates from the end of the doclist to the beginning.
 */
 void sqlite3Fts3DoclistPrev(
   int bDescIdx,                   /* True if the doclist is desc */
@@ -3471,9 +3865,9 @@ void sqlite3Fts3DoclistPrev(
 ** successfully advanced, *pbEof is set to 0.
 */
 static int fts3EvalPhraseNext(
-  Fts3Cursor *pCsr, 
-  Fts3Phrase *p, 
-  u8 *pbEof
+  Fts3Cursor *pCsr,               /* FTS Cursor handle */
+  Fts3Phrase *p,                  /* Phrase object to advance to next docid */
+  u8 *pbEof                       /* OUT: Set to 1 if EOF */
 ){
   int rc = SQLITE_OK;
   Fts3Doclist *pDL = &p->doclist;
@@ -3519,10 +3913,10 @@ static int fts3EvalPhraseNext(
 
       /* pIter now points just past the 0x00 that terminates the position-
       ** list for document pDL->iDocid. However, if this position-list was
-      ** edited in place by fts3EvalNearTrim2(), then pIter may not actually
+      ** edited in place by fts3EvalNearTrim(), then pIter may not actually
       ** point to the start of the next docid value. The following line deals
       ** with this case by advancing pIter past the zero-padding added by
-      ** fts3EvalNearTrim2().  */
+      ** fts3EvalNearTrim().  */
       while( pIter<pEnd && *pIter==0 ) pIter++;
 
       pDL->pNextDocid = pIter;
@@ -3534,11 +3928,27 @@ static int fts3EvalPhraseNext(
   return rc;
 }
 
+/*
+**
+** If *pRc is not SQLITE_OK when this function is called, it is a no-op.
+** Otherwise, fts3EvalPhraseStart() is called on all phrases within the
+** expression. Also the Fts3Expr.bDeferred variable is set to true for any
+** expressions for which all descendent tokens are deferred.
+**
+** If parameter bOptOk is zero, then it is guaranteed that the
+** Fts3Phrase.doclist.aAll/nAll variables contain the entire doclist for
+** each phrase in the expression (subject to deferred token processing).
+** Or, if bOptOk is non-zero, then one or more tokens within the expression
+** may be loaded incrementally, meaning doclist.aAll/nAll is not available.
+**
+** If an error occurs within this function, *pRc is set to an SQLite error
+** code before returning.
+*/
 static void fts3EvalStartReaders(
-  Fts3Cursor *pCsr, 
-  Fts3Expr *pExpr, 
-  int bOptOk,
-  int *pRc
+  Fts3Cursor *pCsr,               /* FTS Cursor handle */
+  Fts3Expr *pExpr,                /* Expression to initialize phrases in */
+  int bOptOk,                     /* True to enable incremental loading */
+  int *pRc                        /* IN/OUT: Error code */
 ){
   if( pExpr && SQLITE_OK==*pRc ){
     if( pExpr->eType==FTSQUERY_PHRASE ){
@@ -3557,25 +3967,44 @@ static void fts3EvalStartReaders(
   }
 }
 
+/*
+** An array of the following structures is assembled as part of the process
+** of selecting tokens to defer before the query starts executing (as part
+** of the xFilter() method). There is one element in the array for each
+** token in the FTS expression.
+**
+** Tokens are divided into AND/NEAR clusters. All tokens in a cluster belong
+** to phrases that are connected only by AND and NEAR operators (not OR or
+** NOT). When determining tokens to defer, each AND/NEAR cluster is considered
+** separately. The root of a tokens AND/NEAR cluster is stored in 
+** Fts3TokenAndCost.pRoot.
+*/
 typedef struct Fts3TokenAndCost Fts3TokenAndCost;
 struct Fts3TokenAndCost {
   Fts3Phrase *pPhrase;            /* The phrase the token belongs to */
   int iToken;                     /* Position of token in phrase */
   Fts3PhraseToken *pToken;        /* The token itself */
-  Fts3Expr *pRoot; 
-  int nOvfl;
+  Fts3Expr *pRoot;                /* Root of NEAR/AND cluster */
+  int nOvfl;                      /* Number of overflow pages to load doclist */
   int iCol;                       /* The column the token must match */
 };
 
+/*
+** This function is used to populate an allocated Fts3TokenAndCost array.
+**
+** If *pRc is not SQLITE_OK when this function is called, it is a no-op.
+** Otherwise, if an error occurs during execution, *pRc is set to an
+** SQLite error code.
+*/
 static void fts3EvalTokenCosts(
-  Fts3Cursor *pCsr, 
-  Fts3Expr *pRoot, 
-  Fts3Expr *pExpr, 
-  Fts3TokenAndCost **ppTC,
-  Fts3Expr ***ppOr,
-  int *pRc
+  Fts3Cursor *pCsr,               /* FTS Cursor handle */
+  Fts3Expr *pRoot,                /* Root of current AND/NEAR cluster */
+  Fts3Expr *pExpr,                /* Expression to consider */
+  Fts3TokenAndCost **ppTC,        /* Write new entries to *(*ppTC)++ */
+  Fts3Expr ***ppOr,               /* Write new OR root to *(*ppOr)++ */
+  int *pRc                        /* IN/OUT: Error code */
 ){
-  if( *pRc==SQLITE_OK && pExpr ){
+  if( *pRc==SQLITE_OK ){
     if( pExpr->eType==FTSQUERY_PHRASE ){
       Fts3Phrase *pPhrase = pExpr->pPhrase;
       int i;
@@ -3589,6 +4018,11 @@ static void fts3EvalTokenCosts(
         *pRc = sqlite3Fts3MsrOvfl(pCsr, pTC->pToken->pSegcsr, &pTC->nOvfl);
       }
     }else if( pExpr->eType!=FTSQUERY_NOT ){
+      assert( pExpr->eType==FTSQUERY_OR
+           || pExpr->eType==FTSQUERY_AND
+           || pExpr->eType==FTSQUERY_NEAR
+      );
+      assert( pExpr->pLeft && pExpr->pRight );
       if( pExpr->eType==FTSQUERY_OR ){
         pRoot = pExpr->pLeft;
         **ppOr = pRoot;
@@ -3605,19 +4039,30 @@ static void fts3EvalTokenCosts(
   }
 }
 
+/*
+** Determine the average document (row) size in pages. If successful,
+** write this value to *pnPage and return SQLITE_OK. Otherwise, return
+** an SQLite error code.
+**
+** The average document size in pages is calculated by first calculating 
+** determining the average size in bytes, B. If B is less than the amount
+** of data that will fit on a single leaf page of an intkey table in
+** this database, then the average docsize is 1. Otherwise, it is 1 plus
+** the number of overflow pages consumed by a record B bytes in size.
+*/
 static int fts3EvalAverageDocsize(Fts3Cursor *pCsr, int *pnPage){
   if( pCsr->nRowAvg==0 ){
     /* The average document size, which is required to calculate the cost
-     ** of each doclist, has not yet been determined. Read the required 
-     ** data from the %_stat table to calculate it.
-     **
-     ** Entry 0 of the %_stat table is a blob containing (nCol+1) FTS3 
-     ** varints, where nCol is the number of columns in the FTS3 table.
-     ** The first varint is the number of documents currently stored in
-     ** the table. The following nCol varints contain the total amount of
-     ** data stored in all rows of each column of the table, from left
-     ** to right.
-     */
+    ** of each doclist, has not yet been determined. Read the required 
+    ** data from the %_stat table to calculate it.
+    **
+    ** Entry 0 of the %_stat table is a blob containing (nCol+1) FTS3 
+    ** varints, where nCol is the number of columns in the FTS3 table.
+    ** The first varint is the number of documents currently stored in
+    ** the table. The following nCol varints contain the total amount of
+    ** data stored in all rows of each column of the table, from left
+    ** to right.
+    */
     int rc;
     Fts3Table *p = (Fts3Table*)pCsr->base.pVtab;
     sqlite3_stmt *pStmt;
@@ -3638,7 +4083,7 @@ static int fts3EvalAverageDocsize(Fts3Cursor *pCsr, int *pnPage){
     }
     if( nDoc==0 || nByte==0 ){
       sqlite3_reset(pStmt);
-      return SQLITE_CORRUPT_VTAB;
+      return FTS_CORRUPT_VTAB;
     }
 
     pCsr->nDoc = nDoc;
@@ -3652,68 +4097,130 @@ static int fts3EvalAverageDocsize(Fts3Cursor *pCsr, int *pnPage){
   return SQLITE_OK;
 }
 
+/*
+** This function is called to select the tokens (if any) that will be 
+** deferred. The array aTC[] has already been populated when this is
+** called.
+**
+** This function is called once for each AND/NEAR cluster in the 
+** expression. Each invocation determines which tokens to defer within
+** the cluster with root node pRoot. See comments above the definition
+** of struct Fts3TokenAndCost for more details.
+**
+** If no error occurs, SQLITE_OK is returned and sqlite3Fts3DeferToken()
+** called on each token to defer. Otherwise, an SQLite error code is
+** returned.
+*/
 static int fts3EvalSelectDeferred(
-  Fts3Cursor *pCsr,
-  Fts3Expr *pRoot,
-  Fts3TokenAndCost *aTC,
-  int nTC
+  Fts3Cursor *pCsr,               /* FTS Cursor handle */
+  Fts3Expr *pRoot,                /* Consider tokens with this root node */
+  Fts3TokenAndCost *aTC,          /* Array of expression tokens and costs */
+  int nTC                         /* Number of entries in aTC[] */
 ){
-  int nDocSize = 0;
-  int nDocEst = 0;
-  int rc = SQLITE_OK;
   Fts3Table *pTab = (Fts3Table *)pCsr->base.pVtab;
-  int ii;
+  int nDocSize = 0;               /* Number of pages per doc loaded */
+  int rc = SQLITE_OK;             /* Return code */
+  int ii;                         /* Iterator variable for various purposes */
+  int nOvfl = 0;                  /* Total overflow pages used by doclists */
+  int nToken = 0;                 /* Total number of tokens in cluster */
 
-  int nOvfl = 0;
-  int nTerm = 0;
+  int nMinEst = 0;                /* The minimum count for any phrase so far. */
+  int nLoad4 = 1;                 /* (Phrases that will be loaded)^4. */
 
+  /* Tokens are never deferred for FTS tables created using the content=xxx
+  ** option. The reason being that it is not guaranteed that the content
+  ** table actually contains the same data as the index. To prevent this from
+  ** causing any problems, the deferred token optimization is completely
+  ** disabled for content=xxx tables. */
+  if( pTab->zContentTbl ){
+    return SQLITE_OK;
+  }
+
+  /* Count the tokens in this AND/NEAR cluster. If none of the doclists
+  ** associated with the tokens spill onto overflow pages, or if there is
+  ** only 1 token, exit early. No tokens to defer in this case. */
   for(ii=0; ii<nTC; ii++){
     if( aTC[ii].pRoot==pRoot ){
       nOvfl += aTC[ii].nOvfl;
-      nTerm++;
+      nToken++;
     }
   }
-  if( nOvfl==0 || nTerm<2 ) return SQLITE_OK;
+  if( nOvfl==0 || nToken<2 ) return SQLITE_OK;
 
+  /* Obtain the average docsize (in pages). */
   rc = fts3EvalAverageDocsize(pCsr, &nDocSize);
+  assert( rc!=SQLITE_OK || nDocSize>0 );
 
-  for(ii=0; ii<nTerm && rc==SQLITE_OK; ii++){
-    int jj;
-    Fts3TokenAndCost *pTC = 0;
 
-    for(jj=0; jj<nTC; jj++){
-      if( aTC[jj].pToken && aTC[jj].pRoot==pRoot 
-       && (!pTC || aTC[jj].nOvfl<pTC->nOvfl) 
+  /* Iterate through all tokens in this AND/NEAR cluster, in ascending order 
+  ** of the number of overflow pages that will be loaded by the pager layer 
+  ** to retrieve the entire doclist for the token from the full-text index.
+  ** Load the doclists for tokens that are either:
+  **
+  **   a. The cheapest token in the entire query (i.e. the one visited by the
+  **      first iteration of this loop), or
+  **
+  **   b. Part of a multi-token phrase.
+  **
+  ** After each token doclist is loaded, merge it with the others from the
+  ** same phrase and count the number of documents that the merged doclist
+  ** contains. Set variable "nMinEst" to the smallest number of documents in 
+  ** any phrase doclist for which 1 or more token doclists have been loaded.
+  ** Let nOther be the number of other phrases for which it is certain that
+  ** one or more tokens will not be deferred.
+  **
+  ** Then, for each token, defer it if loading the doclist would result in
+  ** loading N or more overflow pages into memory, where N is computed as:
+  **
+  **    (nMinEst + 4^nOther - 1) / (4^nOther)
+  */
+  for(ii=0; ii<nToken && rc==SQLITE_OK; ii++){
+    int iTC;                      /* Used to iterate through aTC[] array. */
+    Fts3TokenAndCost *pTC = 0;    /* Set to cheapest remaining token. */
+
+    /* Set pTC to point to the cheapest remaining token. */
+    for(iTC=0; iTC<nTC; iTC++){
+      if( aTC[iTC].pToken && aTC[iTC].pRoot==pRoot 
+       && (!pTC || aTC[iTC].nOvfl<pTC->nOvfl) 
       ){
-        pTC = &aTC[jj];
+        pTC = &aTC[iTC];
       }
     }
     assert( pTC );
 
-    /* At this point pTC points to the cheapest remaining token. */
-    if( ii==0 ){
-      if( pTC->nOvfl ){
-        nDocEst = (pTC->nOvfl * pTab->nPgsz + pTab->nPgsz) / 10;
-      }else{
+    if( ii && pTC->nOvfl>=((nMinEst+(nLoad4/4)-1)/(nLoad4/4))*nDocSize ){
+      /* The number of overflow pages to load for this (and therefore all
+      ** subsequent) tokens is greater than the estimated number of pages 
+      ** that will be loaded if all subsequent tokens are deferred.
+      */
+      Fts3PhraseToken *pToken = pTC->pToken;
+      rc = sqlite3Fts3DeferToken(pCsr, pToken, pTC->iCol);
+      fts3SegReaderCursorFree(pToken->pSegcsr);
+      pToken->pSegcsr = 0;
+    }else{
+      /* Set nLoad4 to the value of (4^nOther) for the next iteration of the
+      ** for-loop. Except, limit the value to 2^24 to prevent it from 
+      ** overflowing the 32-bit integer it is stored in. */
+      if( ii<12 ) nLoad4 = nLoad4*4;
+
+      if( ii==0 || pTC->pPhrase->nToken>1 ){
+        /* Either this is the cheapest token in the entire query, or it is
+        ** part of a multi-token phrase. Either way, the entire doclist will
+        ** (eventually) be loaded into memory. It may as well be now. */
         Fts3PhraseToken *pToken = pTC->pToken;
         int nList = 0;
         char *pList = 0;
-        rc = fts3TermSelect(pTab, pToken, pTC->iCol, 1, &nList, &pList);
+        rc = fts3TermSelect(pTab, pToken, pTC->iCol, &nList, &pList);
         assert( rc==SQLITE_OK || pList==0 );
-
         if( rc==SQLITE_OK ){
-          nDocEst = fts3DoclistCountDocids(1, pList, nList);
+          int nCount;
           fts3EvalPhraseMergeToken(pTab, pTC->pPhrase, pTC->iToken,pList,nList);
+          nCount = fts3DoclistCountDocids(
+              pTC->pPhrase->doclist.aAll, pTC->pPhrase->doclist.nAll
+          );
+          if( ii==0 || nCount<nMinEst ) nMinEst = nCount;
         }
       }
-    }else{
-      if( pTC->nOvfl>=(nDocEst*nDocSize) ){
-        Fts3PhraseToken *pToken = pTC->pToken;
-        rc = sqlite3Fts3DeferToken(pCsr, pToken, pTC->iCol);
-        fts3SegReaderCursorFree(pToken->pSegcsr);
-        pToken->pSegcsr = 0;
-      }
-      nDocEst = 1 + (nDocEst/4);
     }
     pTC->pToken = 0;
   }
@@ -3721,36 +4228,29 @@ static int fts3EvalSelectDeferred(
   return rc;
 }
 
-int sqlite3Fts3EvalStart(Fts3Cursor *pCsr, Fts3Expr *pExpr, int bOptOk){
+/*
+** This function is called from within the xFilter method. It initializes
+** the full-text query currently stored in pCsr->pExpr. To iterate through
+** the results of a query, the caller does:
+**
+**    fts3EvalStart(pCsr);
+**    while( 1 ){
+**      fts3EvalNext(pCsr);
+**      if( pCsr->bEof ) break;
+**      ... return row pCsr->iPrevId to the caller ...
+**    }
+*/
+static int fts3EvalStart(Fts3Cursor *pCsr){
   Fts3Table *pTab = (Fts3Table *)pCsr->base.pVtab;
   int rc = SQLITE_OK;
   int nToken = 0;
   int nOr = 0;
 
   /* Allocate a MultiSegReader for each token in the expression. */
-  fts3EvalAllocateReaders(pCsr, pExpr, &nToken, &nOr, &rc);
+  fts3EvalAllocateReaders(pCsr, pCsr->pExpr, &nToken, &nOr, &rc);
 
-  /* Call fts3EvalPhraseStart() on all phrases in the expression. TODO:
-  ** This call will eventually also be responsible for determining which
-  ** tokens are 'deferred' until the document text is loaded into memory.
-  **
-  ** Each token in each phrase is dealt with using one of the following
-  ** three strategies:
-  **
-  **   1. Entire doclist loaded into memory as part of the
-  **      fts3EvalStartReaders() call.
-  **
-  **   2. Doclist loaded into memory incrementally, as part of each
-  **      sqlite3Fts3EvalNext() call.
-  **
-  **   3. Token doclist is never loaded. Instead, documents are loaded into
-  **      memory and scanned for the token as part of the sqlite3Fts3EvalNext()
-  **      call. This is known as a "deferred" token.
-  */
-
-  /* If bOptOk is true, check if there are any tokens that should be deferred.
-  */
-  if( rc==SQLITE_OK && bOptOk && nToken>1 && pTab->bHasStat ){
+  /* Determine which, if any, tokens in the expression should be deferred. */
+  if( rc==SQLITE_OK && nToken>1 && pTab->bHasStat ){
     Fts3TokenAndCost *aTC;
     Fts3Expr **apOr;
     aTC = (Fts3TokenAndCost *)sqlite3_malloc(
@@ -3766,7 +4266,7 @@ int sqlite3Fts3EvalStart(Fts3Cursor *pCsr, Fts3Expr *pExpr, int bOptOk){
       Fts3TokenAndCost *pTC = aTC;
       Fts3Expr **ppOr = apOr;
 
-      fts3EvalTokenCosts(pCsr, 0, pExpr, &pTC, &ppOr, &rc);
+      fts3EvalTokenCosts(pCsr, 0, pCsr->pExpr, &pTC, &ppOr, &rc);
       nToken = pTC-aTC;
       nOr = ppOr-apOr;
 
@@ -3781,11 +4281,14 @@ int sqlite3Fts3EvalStart(Fts3Cursor *pCsr, Fts3Expr *pExpr, int bOptOk){
     }
   }
 
-  fts3EvalStartReaders(pCsr, pExpr, bOptOk, &rc);
+  fts3EvalStartReaders(pCsr, pCsr->pExpr, 1, &rc);
   return rc;
 }
 
-static void fts3EvalZeroPoslist(Fts3Phrase *pPhrase){
+/*
+** Invalidate the current position list for phrase pPhrase.
+*/
+static void fts3EvalInvalidatePoslist(Fts3Phrase *pPhrase){
   if( pPhrase->doclist.bFreeList ){
     sqlite3_free(pPhrase->doclist.pList);
   }
@@ -3794,8 +4297,30 @@ static void fts3EvalZeroPoslist(Fts3Phrase *pPhrase){
   pPhrase->doclist.bFreeList = 0;
 }
 
-static int fts3EvalNearTrim2(
-  int nNear,
+/*
+** This function is called to edit the position list associated with
+** the phrase object passed as the fifth argument according to a NEAR
+** condition. For example:
+**
+**     abc NEAR/5 "def ghi"
+**
+** Parameter nNear is passed the NEAR distance of the expression (5 in
+** the example above). When this function is called, *paPoslist points to
+** the position list, and *pnToken is the number of phrase tokens in, the
+** phrase on the other side of the NEAR operator to pPhrase. For example,
+** if pPhrase refers to the "def ghi" phrase, then *paPoslist points to
+** the position list associated with phrase "abc".
+**
+** All positions in the pPhrase position list that are not sufficiently
+** close to a position in the *paPoslist position list are removed. If this
+** leaves 0 positions, zero is returned. Otherwise, non-zero.
+**
+** Before returning, *paPoslist is set to point to the position lsit 
+** associated with pPhrase. And *pnToken is set to the number of tokens in
+** pPhrase.
+*/
+static int fts3EvalNearTrim(
+  int nNear,                      /* NEAR distance. As in "NEAR/nNear". */
   char *aTmp,                     /* Temporary space to use */
   char **paPoslist,               /* IN/OUT: Position list */
   int *pnToken,                   /* IN/OUT: Tokens in phrase of *paPoslist */
@@ -3827,6 +4352,172 @@ static int fts3EvalNearTrim2(
   return res;
 }
 
+/*
+** This function is a no-op if *pRc is other than SQLITE_OK when it is called.
+** Otherwise, it advances the expression passed as the second argument to
+** point to the next matching row in the database. Expressions iterate through
+** matching rows in docid order. Ascending order if Fts3Cursor.bDesc is zero,
+** or descending if it is non-zero.
+**
+** If an error occurs, *pRc is set to an SQLite error code. Otherwise, if
+** successful, the following variables in pExpr are set:
+**
+**   Fts3Expr.bEof                (non-zero if EOF - there is no next row)
+**   Fts3Expr.iDocid              (valid if bEof==0. The docid of the next row)
+**
+** If the expression is of type FTSQUERY_PHRASE, and the expression is not
+** at EOF, then the following variables are populated with the position list
+** for the phrase for the visited row:
+**
+**   FTs3Expr.pPhrase->doclist.nList        (length of pList in bytes)
+**   FTs3Expr.pPhrase->doclist.pList        (pointer to position list)
+**
+** It says above that this function advances the expression to the next
+** matching row. This is usually true, but there are the following exceptions:
+**
+**   1. Deferred tokens are not taken into account. If a phrase consists
+**      entirely of deferred tokens, it is assumed to match every row in
+**      the db. In this case the position-list is not populated at all. 
+**
+**      Or, if a phrase contains one or more deferred tokens and one or
+**      more non-deferred tokens, then the expression is advanced to the 
+**      next possible match, considering only non-deferred tokens. In other
+**      words, if the phrase is "A B C", and "B" is deferred, the expression
+**      is advanced to the next row that contains an instance of "A * C", 
+**      where "*" may match any single token. The position list in this case
+**      is populated as for "A * C" before returning.
+**
+**   2. NEAR is treated as AND. If the expression is "x NEAR y", it is 
+**      advanced to point to the next row that matches "x AND y".
+** 
+** See fts3EvalTestDeferredAndNear() for details on testing if a row is
+** really a match, taking into account deferred tokens and NEAR operators.
+*/
+static void fts3EvalNextRow(
+  Fts3Cursor *pCsr,               /* FTS Cursor handle */
+  Fts3Expr *pExpr,                /* Expr. to advance to next matching row */
+  int *pRc                        /* IN/OUT: Error code */
+){
+  if( *pRc==SQLITE_OK ){
+    int bDescDoclist = pCsr->bDesc;         /* Used by DOCID_CMP() macro */
+    assert( pExpr->bEof==0 );
+    pExpr->bStart = 1;
+
+    switch( pExpr->eType ){
+      case FTSQUERY_NEAR:
+      case FTSQUERY_AND: {
+        Fts3Expr *pLeft = pExpr->pLeft;
+        Fts3Expr *pRight = pExpr->pRight;
+        assert( !pLeft->bDeferred || !pRight->bDeferred );
+
+        if( pLeft->bDeferred ){
+          /* LHS is entirely deferred. So we assume it matches every row.
+          ** Advance the RHS iterator to find the next row visited. */
+          fts3EvalNextRow(pCsr, pRight, pRc);
+          pExpr->iDocid = pRight->iDocid;
+          pExpr->bEof = pRight->bEof;
+        }else if( pRight->bDeferred ){
+          /* RHS is entirely deferred. So we assume it matches every row.
+          ** Advance the LHS iterator to find the next row visited. */
+          fts3EvalNextRow(pCsr, pLeft, pRc);
+          pExpr->iDocid = pLeft->iDocid;
+          pExpr->bEof = pLeft->bEof;
+        }else{
+          /* Neither the RHS or LHS are deferred. */
+          fts3EvalNextRow(pCsr, pLeft, pRc);
+          fts3EvalNextRow(pCsr, pRight, pRc);
+          while( !pLeft->bEof && !pRight->bEof && *pRc==SQLITE_OK ){
+            sqlite3_int64 iDiff = DOCID_CMP(pLeft->iDocid, pRight->iDocid);
+            if( iDiff==0 ) break;
+            if( iDiff<0 ){
+              fts3EvalNextRow(pCsr, pLeft, pRc);
+            }else{
+              fts3EvalNextRow(pCsr, pRight, pRc);
+            }
+          }
+          pExpr->iDocid = pLeft->iDocid;
+          pExpr->bEof = (pLeft->bEof || pRight->bEof);
+        }
+        break;
+      }
+  
+      case FTSQUERY_OR: {
+        Fts3Expr *pLeft = pExpr->pLeft;
+        Fts3Expr *pRight = pExpr->pRight;
+        sqlite3_int64 iCmp = DOCID_CMP(pLeft->iDocid, pRight->iDocid);
+
+        assert( pLeft->bStart || pLeft->iDocid==pRight->iDocid );
+        assert( pRight->bStart || pLeft->iDocid==pRight->iDocid );
+
+        if( pRight->bEof || (pLeft->bEof==0 && iCmp<0) ){
+          fts3EvalNextRow(pCsr, pLeft, pRc);
+        }else if( pLeft->bEof || (pRight->bEof==0 && iCmp>0) ){
+          fts3EvalNextRow(pCsr, pRight, pRc);
+        }else{
+          fts3EvalNextRow(pCsr, pLeft, pRc);
+          fts3EvalNextRow(pCsr, pRight, pRc);
+        }
+
+        pExpr->bEof = (pLeft->bEof && pRight->bEof);
+        iCmp = DOCID_CMP(pLeft->iDocid, pRight->iDocid);
+        if( pRight->bEof || (pLeft->bEof==0 &&  iCmp<0) ){
+          pExpr->iDocid = pLeft->iDocid;
+        }else{
+          pExpr->iDocid = pRight->iDocid;
+        }
+
+        break;
+      }
+
+      case FTSQUERY_NOT: {
+        Fts3Expr *pLeft = pExpr->pLeft;
+        Fts3Expr *pRight = pExpr->pRight;
+
+        if( pRight->bStart==0 ){
+          fts3EvalNextRow(pCsr, pRight, pRc);
+          assert( *pRc!=SQLITE_OK || pRight->bStart );
+        }
+
+        fts3EvalNextRow(pCsr, pLeft, pRc);
+        if( pLeft->bEof==0 ){
+          while( !*pRc 
+              && !pRight->bEof 
+              && DOCID_CMP(pLeft->iDocid, pRight->iDocid)>0 
+          ){
+            fts3EvalNextRow(pCsr, pRight, pRc);
+          }
+        }
+        pExpr->iDocid = pLeft->iDocid;
+        pExpr->bEof = pLeft->bEof;
+        break;
+      }
+
+      default: {
+        Fts3Phrase *pPhrase = pExpr->pPhrase;
+        fts3EvalInvalidatePoslist(pPhrase);
+        *pRc = fts3EvalPhraseNext(pCsr, pPhrase, &pExpr->bEof);
+        pExpr->iDocid = pPhrase->doclist.iDocid;
+        break;
+      }
+    }
+  }
+}
+
+/*
+** If *pRc is not SQLITE_OK, or if pExpr is not the root node of a NEAR
+** cluster, then this function returns 1 immediately.
+**
+** Otherwise, it checks if the current row really does match the NEAR 
+** expression, using the data currently stored in the position lists 
+** (Fts3Expr->pPhrase.doclist.pList/nList) for each phrase in the expression. 
+**
+** If the current row is a match, the position list associated with each
+** phrase in the NEAR expression is edited in place to contain only those
+** phrase instances sufficiently close to their peers to satisfy all NEAR
+** constraints. In this case it returns 1. If the NEAR expression does not 
+** match the current row, 0 is returned. The position lists may or may not
+** be edited if 0 is returned.
+*/
 static int fts3EvalNearTest(Fts3Expr *pExpr, int *pRc){
   int res = 1;
 
@@ -3848,7 +4539,7 @@ static int fts3EvalNearTest(Fts3Expr *pExpr, int *pRc){
   **
   ** The right-hand child of a NEAR node is always a phrase. The 
   ** left-hand child may be either a phrase or a NEAR node. There are
-  ** no exceptions to this.
+  ** no exceptions to this - it's the way the parser in fts3_expr.c works.
   */
   if( *pRc==SQLITE_OK 
    && pExpr->eType==FTSQUERY_NEAR 
@@ -3875,17 +4566,20 @@ static int fts3EvalNearTest(Fts3Expr *pExpr, int *pRc){
       for(p=p->pParent;res && p && p->eType==FTSQUERY_NEAR; p=p->pParent){
         Fts3Phrase *pPhrase = p->pRight->pPhrase;
         int nNear = p->nNear;
-        res = fts3EvalNearTrim2(nNear, aTmp, &aPoslist, &nToken, pPhrase);
+        res = fts3EvalNearTrim(nNear, aTmp, &aPoslist, &nToken, pPhrase);
       }
   
       aPoslist = pExpr->pRight->pPhrase->doclist.pList;
       nToken = pExpr->pRight->pPhrase->nToken;
       for(p=pExpr->pLeft; p && res; p=p->pLeft){
-        int nNear = p->pParent->nNear;
-        Fts3Phrase *pPhrase = (
+        int nNear;
+        Fts3Phrase *pPhrase;
+        assert( p->pParent && p->pParent->pLeft==p );
+        nNear = p->pParent->nNear;
+        pPhrase = (
             p->eType==FTSQUERY_NEAR ? p->pRight->pPhrase : p->pPhrase
         );
-        res = fts3EvalNearTrim2(nNear, aTmp, &aPoslist, &nToken, pPhrase);
+        res = fts3EvalNearTrim(nNear, aTmp, &aPoslist, &nToken, pPhrase);
       }
     }
 
@@ -3896,128 +4590,29 @@ static int fts3EvalNearTest(Fts3Expr *pExpr, int *pRc){
 }
 
 /*
-** This macro is used by the fts3EvalNext() function. The two arguments are
-** 64-bit docid values. If the current query is "ORDER BY docid ASC", then
-** the macro returns (i1 - i2). Or if it is "ORDER BY docid DESC", then
-** it returns (i2 - i1). This allows the same code to be used for merging
-** doclists in ascending or descending order.
+** This function is a helper function for fts3EvalTestDeferredAndNear().
+** Assuming no error occurs or has occurred, It returns non-zero if the
+** expression passed as the second argument matches the row that pCsr 
+** currently points to, or zero if it does not.
+**
+** If *pRc is not SQLITE_OK when this function is called, it is a no-op.
+** If an error occurs during execution of this function, *pRc is set to 
+** the appropriate SQLite error code. In this case the returned value is 
+** undefined.
 */
-#define DOCID_CMP(i1, i2) ((pCsr->bDesc?-1:1) * (i1-i2))
-
-static void fts3EvalNext(
-  Fts3Cursor *pCsr, 
-  Fts3Expr *pExpr, 
-  int *pRc
+static int fts3EvalTestExpr(
+  Fts3Cursor *pCsr,               /* FTS cursor handle */
+  Fts3Expr *pExpr,                /* Expr to test. May or may not be root. */
+  int *pRc                        /* IN/OUT: Error code */
 ){
-  if( *pRc==SQLITE_OK ){
-    assert( pExpr->bEof==0 );
-    pExpr->bStart = 1;
-
-    switch( pExpr->eType ){
-      case FTSQUERY_NEAR:
-      case FTSQUERY_AND: {
-        Fts3Expr *pLeft = pExpr->pLeft;
-        Fts3Expr *pRight = pExpr->pRight;
-        assert( !pLeft->bDeferred || !pRight->bDeferred );
-        if( pLeft->bDeferred ){
-          fts3EvalNext(pCsr, pRight, pRc);
-          pExpr->iDocid = pRight->iDocid;
-          pExpr->bEof = pRight->bEof;
-        }else if( pRight->bDeferred ){
-          fts3EvalNext(pCsr, pLeft, pRc);
-          pExpr->iDocid = pLeft->iDocid;
-          pExpr->bEof = pLeft->bEof;
-        }else{
-          fts3EvalNext(pCsr, pLeft, pRc);
-          fts3EvalNext(pCsr, pRight, pRc);
-
-          while( !pLeft->bEof && !pRight->bEof && *pRc==SQLITE_OK ){
-            sqlite3_int64 iDiff = DOCID_CMP(pLeft->iDocid, pRight->iDocid);
-            if( iDiff==0 ) break;
-            if( iDiff<0 ){
-              fts3EvalNext(pCsr, pLeft, pRc);
-            }else{
-              fts3EvalNext(pCsr, pRight, pRc);
-            }
-          }
-
-          pExpr->iDocid = pLeft->iDocid;
-          pExpr->bEof = (pLeft->bEof || pRight->bEof);
-        }
-        break;
-      }
-  
-      case FTSQUERY_OR: {
-        Fts3Expr *pLeft = pExpr->pLeft;
-        Fts3Expr *pRight = pExpr->pRight;
-        sqlite3_int64 iCmp = DOCID_CMP(pLeft->iDocid, pRight->iDocid);
-
-        assert( pLeft->bStart || pLeft->iDocid==pRight->iDocid );
-        assert( pRight->bStart || pLeft->iDocid==pRight->iDocid );
-
-        if( pRight->bEof || (pLeft->bEof==0 && iCmp<0) ){
-          fts3EvalNext(pCsr, pLeft, pRc);
-        }else if( pLeft->bEof || (pRight->bEof==0 && iCmp>0) ){
-          fts3EvalNext(pCsr, pRight, pRc);
-        }else{
-          fts3EvalNext(pCsr, pLeft, pRc);
-          fts3EvalNext(pCsr, pRight, pRc);
-        }
-
-        pExpr->bEof = (pLeft->bEof && pRight->bEof);
-        iCmp = DOCID_CMP(pLeft->iDocid, pRight->iDocid);
-        if( pRight->bEof || (pLeft->bEof==0 &&  iCmp<0) ){
-          pExpr->iDocid = pLeft->iDocid;
-        }else{
-          pExpr->iDocid = pRight->iDocid;
-        }
-
-        break;
-      }
-
-      case FTSQUERY_NOT: {
-        Fts3Expr *pLeft = pExpr->pLeft;
-        Fts3Expr *pRight = pExpr->pRight;
-
-        if( pRight->bStart==0 ){
-          fts3EvalNext(pCsr, pRight, pRc);
-          assert( *pRc!=SQLITE_OK || pRight->bStart );
-        }
-
-        fts3EvalNext(pCsr, pLeft, pRc);
-        if( pLeft->bEof==0 ){
-          while( !*pRc 
-              && !pRight->bEof 
-              && DOCID_CMP(pLeft->iDocid, pRight->iDocid)>0 
-          ){
-            fts3EvalNext(pCsr, pRight, pRc);
-          }
-        }
-        pExpr->iDocid = pLeft->iDocid;
-        pExpr->bEof = pLeft->bEof;
-        break;
-      }
-
-      default: {
-        Fts3Phrase *pPhrase = pExpr->pPhrase;
-        fts3EvalZeroPoslist(pPhrase);
-        *pRc = fts3EvalPhraseNext(pCsr, pPhrase, &pExpr->bEof);
-        pExpr->iDocid = pPhrase->doclist.iDocid;
-        break;
-      }
-    }
-  }
-}
-
-static int fts3EvalDeferredTest(Fts3Cursor *pCsr, Fts3Expr *pExpr, int *pRc){
-  int bHit = 1;
+  int bHit = 1;                   /* Return value */
   if( *pRc==SQLITE_OK ){
     switch( pExpr->eType ){
       case FTSQUERY_NEAR:
       case FTSQUERY_AND:
         bHit = (
-            fts3EvalDeferredTest(pCsr, pExpr->pLeft, pRc)
-         && fts3EvalDeferredTest(pCsr, pExpr->pRight, pRc)
+            fts3EvalTestExpr(pCsr, pExpr->pLeft, pRc)
+         && fts3EvalTestExpr(pCsr, pExpr->pRight, pRc)
          && fts3EvalNearTest(pExpr, pRc)
         );
 
@@ -4043,27 +4638,27 @@ static int fts3EvalDeferredTest(Fts3Cursor *pCsr, Fts3Expr *pExpr, int *pRc){
           Fts3Expr *p;
           for(p=pExpr; p->pPhrase==0; p=p->pLeft){
             if( p->pRight->iDocid==pCsr->iPrevId ){
-              fts3EvalZeroPoslist(p->pRight->pPhrase);
+              fts3EvalInvalidatePoslist(p->pRight->pPhrase);
             }
           }
           if( p->iDocid==pCsr->iPrevId ){
-            fts3EvalZeroPoslist(p->pPhrase);
+            fts3EvalInvalidatePoslist(p->pPhrase);
           }
         }
 
         break;
 
       case FTSQUERY_OR: {
-        int bHit1 = fts3EvalDeferredTest(pCsr, pExpr->pLeft, pRc);
-        int bHit2 = fts3EvalDeferredTest(pCsr, pExpr->pRight, pRc);
+        int bHit1 = fts3EvalTestExpr(pCsr, pExpr->pLeft, pRc);
+        int bHit2 = fts3EvalTestExpr(pCsr, pExpr->pRight, pRc);
         bHit = bHit1 || bHit2;
         break;
       }
 
       case FTSQUERY_NOT:
         bHit = (
-            fts3EvalDeferredTest(pCsr, pExpr->pLeft, pRc)
-         && !fts3EvalDeferredTest(pCsr, pExpr->pRight, pRc)
+            fts3EvalTestExpr(pCsr, pExpr->pLeft, pRc)
+         && !fts3EvalTestExpr(pCsr, pExpr->pRight, pRc)
         );
         break;
 
@@ -4074,7 +4669,7 @@ static int fts3EvalDeferredTest(Fts3Cursor *pCsr, Fts3Expr *pExpr, int *pRc){
           Fts3Phrase *pPhrase = pExpr->pPhrase;
           assert( pExpr->bDeferred || pPhrase->doclist.bFreeList==0 );
           if( pExpr->bDeferred ){
-            fts3EvalZeroPoslist(pPhrase);
+            fts3EvalInvalidatePoslist(pPhrase);
           }
           *pRc = fts3EvalDeferredPhrase(pCsr, pPhrase);
           bHit = (pPhrase->doclist.pList!=0);
@@ -4090,27 +4685,49 @@ static int fts3EvalDeferredTest(Fts3Cursor *pCsr, Fts3Expr *pExpr, int *pRc){
 }
 
 /*
-** Return 1 if both of the following are true:
+** This function is called as the second part of each xNext operation when
+** iterating through the results of a full-text query. At this point the
+** cursor points to a row that matches the query expression, with the
+** following caveats:
+**
+**   * Up until this point, "NEAR" operators in the expression have been
+**     treated as "AND".
+**
+**   * Deferred tokens have not yet been considered.
+**
+** If *pRc is not SQLITE_OK when this function is called, it immediately
+** returns 0. Otherwise, it tests whether or not after considering NEAR
+** operators and deferred tokens the current row is still a match for the
+** expression. It returns 1 if both of the following are true:
 **
 **   1. *pRc is SQLITE_OK when this function returns, and
 **
 **   2. After scanning the current FTS table row for the deferred tokens,
-**      it is determined that the row does not match the query.
+**      it is determined that the row does *not* match the query.
 **
 ** Or, if no error occurs and it seems the current row does match the FTS
 ** query, return 0.
 */
-static int fts3EvalLoadDeferred(Fts3Cursor *pCsr, int *pRc){
+static int fts3EvalTestDeferredAndNear(Fts3Cursor *pCsr, int *pRc){
   int rc = *pRc;
   int bMiss = 0;
   if( rc==SQLITE_OK ){
+
+    /* If there are one or more deferred tokens, load the current row into
+    ** memory and scan it to determine the position list for each deferred
+    ** token. Then, see if this row is really a match, considering deferred
+    ** tokens and NEAR operators (neither of which were taken into account
+    ** earlier, by fts3EvalNextRow()). 
+    */
     if( pCsr->pDeferred ){
       rc = fts3CursorSeek(0, pCsr);
       if( rc==SQLITE_OK ){
         rc = sqlite3Fts3CacheDeferredDoclists(pCsr);
       }
     }
-    bMiss = (0==fts3EvalDeferredTest(pCsr, pCsr->pExpr, &rc));
+    bMiss = (0==fts3EvalTestExpr(pCsr, pCsr->pExpr, &rc));
+
+    /* Free the position-lists accumulated for each deferred token above. */
     sqlite3Fts3FreeDeferredDoclists(pCsr);
     *pRc = rc;
   }
@@ -4121,7 +4738,7 @@ static int fts3EvalLoadDeferred(Fts3Cursor *pCsr, int *pRc){
 ** Advance to the next document that matches the FTS expression in
 ** Fts3Cursor.pExpr.
 */
-int sqlite3Fts3EvalNext(Fts3Cursor *pCsr){
+static int fts3EvalNext(Fts3Cursor *pCsr){
   int rc = SQLITE_OK;             /* Return Code */
   Fts3Expr *pExpr = pCsr->pExpr;
   assert( pCsr->isEof==0 );
@@ -4133,19 +4750,19 @@ int sqlite3Fts3EvalNext(Fts3Cursor *pCsr){
         sqlite3_reset(pCsr->pStmt);
       }
       assert( sqlite3_data_count(pCsr->pStmt)==0 );
-      fts3EvalNext(pCsr, pExpr, &rc);
+      fts3EvalNextRow(pCsr, pExpr, &rc);
       pCsr->isEof = pExpr->bEof;
       pCsr->isRequireSeek = 1;
       pCsr->isMatchinfoNeeded = 1;
       pCsr->iPrevId = pExpr->iDocid;
-    }while( pCsr->isEof==0 && fts3EvalLoadDeferred(pCsr, &rc) );
+    }while( pCsr->isEof==0 && fts3EvalTestDeferredAndNear(pCsr, &rc) );
   }
   return rc;
 }
 
 /*
 ** Restart interation for expression pExpr so that the next call to
-** sqlite3Fts3EvalNext() visits the first row. Do not allow incremental 
+** fts3EvalNext() visits the first row. Do not allow incremental 
 ** loading or merging of phrase doclists for this iteration.
 **
 ** If *pRc is other than SQLITE_OK when this function is called, it is
@@ -4161,7 +4778,7 @@ static void fts3EvalRestart(
     Fts3Phrase *pPhrase = pExpr->pPhrase;
 
     if( pPhrase ){
-      fts3EvalZeroPoslist(pPhrase);
+      fts3EvalInvalidatePoslist(pPhrase);
       if( pPhrase->bIncr ){
         assert( pPhrase->nToken==1 );
         assert( pPhrase->aToken[0].pSegcsr );
@@ -4277,14 +4894,14 @@ static int fts3EvalGatherStats(
         assert( sqlite3_data_count(pCsr->pStmt)==0 );
 
         /* Advance to the next document */
-        fts3EvalNext(pCsr, pRoot, &rc);
+        fts3EvalNextRow(pCsr, pRoot, &rc);
         pCsr->isEof = pRoot->bEof;
         pCsr->isRequireSeek = 1;
         pCsr->isMatchinfoNeeded = 1;
         pCsr->iPrevId = pRoot->iDocid;
       }while( pCsr->isEof==0 
            && pRoot->eType==FTSQUERY_NEAR 
-           && fts3EvalLoadDeferred(pCsr, &rc) 
+           && fts3EvalTestDeferredAndNear(pCsr, &rc) 
       );
 
       if( rc==SQLITE_OK && pCsr->isEof==0 ){
@@ -4306,10 +4923,10 @@ static int fts3EvalGatherStats(
       */
       fts3EvalRestart(pCsr, pRoot, &rc);
       do {
-        fts3EvalNext(pCsr, pRoot, &rc);
+        fts3EvalNextRow(pCsr, pRoot, &rc);
         assert( pRoot->bEof==0 );
       }while( pRoot->iDocid!=iDocid && rc==SQLITE_OK );
-      fts3EvalLoadDeferred(pCsr, &rc);
+      fts3EvalTestDeferredAndNear(pCsr, &rc);
     }
   }
   return rc;
@@ -4440,7 +5057,7 @@ void sqlite3Fts3EvalPhraseCleanup(Fts3Phrase *pPhrase){
   if( pPhrase ){
     int i;
     sqlite3_free(pPhrase->doclist.aAll);
-    fts3EvalZeroPoslist(pPhrase);
+    fts3EvalInvalidatePoslist(pPhrase);
     memset(&pPhrase->doclist, 0, sizeof(Fts3Doclist));
     for(i=0; i<pPhrase->nToken; i++){
       fts3SegReaderCursorFree(pPhrase->aToken[i].pSegcsr);
@@ -4449,4 +5066,27 @@ void sqlite3Fts3EvalPhraseCleanup(Fts3Phrase *pPhrase){
   }
 }
 
+/*
+** Return SQLITE_CORRUPT_VTAB.
+*/
+#ifdef SQLITE_DEBUG
+int sqlite3Fts3Corrupt(){
+  return SQLITE_CORRUPT_VTAB;
+}
+#endif
+
+#if !SQLITE_CORE
+/*
+** Initialize API pointer table, if required.
+*/
+int sqlite3_extension_init(
+  sqlite3 *db, 
+  char **pzErrMsg,
+  const sqlite3_api_routines *pApi
+){
+  SQLITE_EXTENSION_INIT2(pApi)
+  return sqlite3Fts3Init(db);
+}
+#endif
+
 #endif
diff --git a/ext/fts3/fts3Int.h b/ext/fts3/fts3Int.h
index 16643796..78392ec3 100644
--- a/ext/fts3/fts3Int.h
+++ b/ext/fts3/fts3Int.h
@@ -27,7 +27,14 @@
 # define SQLITE_ENABLE_FTS3
 #endif
 
-#ifdef SQLITE_ENABLE_FTS3
+#if !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_FTS3)
+
+/* If not building as part of the core, include sqlite3ext.h. */
+#ifndef SQLITE_CORE
+# include "sqlite3ext.h" 
+extern const sqlite3_api_routines *sqlite3_api;
+#endif
+
 #include "sqlite3.h"
 #include "fts3_tokenizer.h"
 #include "fts3_hash.h"
@@ -150,6 +157,13 @@ typedef sqlite3_uint64 u64;       /* 8-byte unsigned integer */
 
 #endif /* SQLITE_AMALGAMATION */
 
+#ifdef SQLITE_DEBUG
+int sqlite3Fts3Corrupt(void);
+# define FTS_CORRUPT_VTAB sqlite3Fts3Corrupt()
+#else
+# define FTS_CORRUPT_VTAB SQLITE_CORRUPT_VTAB
+#endif
+
 typedef struct Fts3Table Fts3Table;
 typedef struct Fts3Cursor Fts3Cursor;
 typedef struct Fts3Expr Fts3Expr;
@@ -177,6 +191,7 @@ struct Fts3Table {
   int nColumn;                    /* number of named columns in virtual table */
   char **azColumn;                /* column names.  malloced */
   sqlite3_tokenizer *pTokenizer;  /* tokenizer for inserts and queries */
+  char *zContentTbl;              /* content=xxx option, or NULL */
 
   /* Precompiled statements used by the implementation. Each of these 
   ** statements is run and reset within a single virtual table API call. 
@@ -217,7 +232,7 @@ struct Fts3Table {
   int nPendingData;               /* Current bytes of pending data */
   sqlite_int64 iPrevDocid;        /* Docid of most recently inserted document */
 
-#if defined(SQLITE_DEBUG)
+#if defined(SQLITE_DEBUG) || defined(SQLITE_COVERAGE_TEST)
   /* State variables used for validating that the transaction control
   ** methods of the virtual table are called at appropriate times.  These
   ** values do not contribution to the FTS computation; they are used for
@@ -290,7 +305,7 @@ struct Fts3Doclist {
   int bFreeList;                 /* True if pList should be sqlite3_free()d */
   char *pList;                   /* Pointer to position list following iDocid */
   int nList;                     /* Length of position list */
-} doclist;
+};
 
 /*
 ** A "phrase" is a sequence of one or more tokens that must match in
@@ -302,6 +317,7 @@ struct Fts3PhraseToken {
   char *z;                        /* Text of the token */
   int n;                          /* Number of bytes in buffer z */
   int isPrefix;                   /* True if token ends with a "*" character */
+  int bFirst;                     /* True if token must appear at position 0 */
 
   /* Variables above this point are populated when the expression is
   ** parsed (by code in fts3_expr.c). Below this point the variables are
@@ -420,6 +436,7 @@ int sqlite3Fts3SegReaderCursor(
 #define FTS3_SEGMENT_COLUMN_FILTER 0x00000004
 #define FTS3_SEGMENT_PREFIX        0x00000008
 #define FTS3_SEGMENT_SCAN          0x00000010
+#define FTS3_SEGMENT_FIRST         0x00000020
 
 /* Type passed as 4th argument to SegmentReaderIterate() */
 struct Fts3SegFilter {
@@ -459,8 +476,8 @@ int sqlite3Fts3GetVarint32(const char *, int *);
 int sqlite3Fts3VarintLen(sqlite3_uint64);
 void sqlite3Fts3Dequote(char *);
 void sqlite3Fts3DoclistPrev(int,char*,int,char**,sqlite3_int64*,int*,u8*);
-
 int sqlite3Fts3EvalPhraseStats(Fts3Cursor *, Fts3Expr *, u32 *);
+int sqlite3Fts3FirstFilter(sqlite3_int64, char *, int, char *);
 
 /* fts3_tokenizer.c */
 const char *sqlite3Fts3NextToken(const char *, int *);
@@ -479,7 +496,7 @@ void sqlite3Fts3Matchinfo(sqlite3_context *, Fts3Cursor *, const char *);
 
 /* fts3_expr.c */
 int sqlite3Fts3ExprParse(sqlite3_tokenizer *, 
-  char **, int, int, const char *, int, Fts3Expr **
+  char **, int, int, int, const char *, int, Fts3Expr **
 );
 void sqlite3Fts3ExprFree(Fts3Expr *);
 #ifdef SQLITE_TEST
@@ -490,19 +507,8 @@ int sqlite3Fts3InitTerm(sqlite3 *db);
 /* fts3_aux.c */
 int sqlite3Fts3InitAux(sqlite3 *db);
 
-int sqlite3Fts3TermSegReaderCursor(
-  Fts3Cursor *pCsr,               /* Virtual table cursor handle */
-  const char *zTerm,              /* Term to query for */
-  int nTerm,                      /* Size of zTerm in bytes */
-  int isPrefix,                   /* True for a prefix search */
-  Fts3MultiSegReader **ppSegcsr   /* OUT: Allocated seg-reader cursor */
-);
-
 void sqlite3Fts3EvalPhraseCleanup(Fts3Phrase *);
 
-int sqlite3Fts3EvalStart(Fts3Cursor *, Fts3Expr *, int);
-int sqlite3Fts3EvalNext(Fts3Cursor *pCsr);
-
 int sqlite3Fts3MsrIncrStart(
     Fts3Table*, Fts3MultiSegReader*, int, const char*, int);
 int sqlite3Fts3MsrIncrNext(
@@ -513,5 +519,5 @@ int sqlite3Fts3MsrIncrRestart(Fts3MultiSegReader *pCsr);
 
 int sqlite3Fts3DeferredTokenList(Fts3DeferredToken *, char **, int *);
 
-#endif /* SQLITE_ENABLE_FTS3 */
+#endif /* !SQLITE_CORE || SQLITE_ENABLE_FTS3 */
 #endif /* _FTSINT_H */
diff --git a/ext/fts3/fts3_expr.c b/ext/fts3/fts3_expr.c
index 7eb2962d..1c3a7907 100644
--- a/ext/fts3/fts3_expr.c
+++ b/ext/fts3/fts3_expr.c
@@ -93,6 +93,7 @@ typedef struct ParseContext ParseContext;
 struct ParseContext {
   sqlite3_tokenizer *pTokenizer;      /* Tokenizer module */
   const char **azCol;                 /* Array of column names for fts3 table */
+  int bFts4;                          /* True to allow FTS4-only syntax */
   int nCol;                           /* Number of entries in azCol[] */
   int iDefaultCol;                    /* Default column to query */
   int isNot;                          /* True if getNextNode() sees a unary - */
@@ -180,9 +181,21 @@ static int getNextToken(
           pRet->pPhrase->aToken[0].isPrefix = 1;
           iEnd++;
         }
-        if( !sqlite3_fts3_enable_parentheses && iStart>0 && z[iStart-1]=='-' ){
-          pParse->isNot = 1;
+
+        while( 1 ){
+          if( !sqlite3_fts3_enable_parentheses 
+           && iStart>0 && z[iStart-1]=='-' 
+          ){
+            pParse->isNot = 1;
+            iStart--;
+          }else if( pParse->bFts4 && iStart>0 && z[iStart-1]=='^' ){
+            pRet->pPhrase->aToken[0].bFirst = 1;
+            iStart--;
+          }else{
+            break;
+          }
         }
+
       }
       nConsumed = iEnd;
     }
@@ -281,6 +294,7 @@ static int getNextString(
 
         pToken->n = nByte;
         pToken->isPrefix = (iEnd<nInput && zInput[iEnd]=='*');
+        pToken->bFirst = (iBegin>0 && zInput[iBegin-1]=='^');
         nToken = ii+1;
       }
     }
@@ -302,8 +316,12 @@ static int getNextString(
     p->pPhrase->nToken = nToken;
 
     zBuf = (char *)&p->pPhrase->aToken[nToken];
-    memcpy(zBuf, zTemp, nTemp);
-    sqlite3_free(zTemp);
+    if( zTemp ){
+      memcpy(zBuf, zTemp, nTemp);
+      sqlite3_free(zTemp);
+    }else{
+      assert( nTemp==0 );
+    }
 
     for(jj=0; jj<p->pPhrase->nToken; jj++){
       p->pPhrase->aToken[jj].z = zBuf;
@@ -728,6 +746,7 @@ exprparse_out:
 int sqlite3Fts3ExprParse(
   sqlite3_tokenizer *pTokenizer,      /* Tokenizer module */
   char **azCol,                       /* Array of column names for fts3 table */
+  int bFts4,                          /* True to allow FTS4-only syntax */
   int nCol,                           /* Number of entries in azCol[] */
   int iDefaultCol,                    /* Default column to query */
   const char *z, int n,               /* Text of MATCH query */
@@ -741,6 +760,7 @@ int sqlite3Fts3ExprParse(
   sParse.nCol = nCol;
   sParse.iDefaultCol = iDefaultCol;
   sParse.nNest = 0;
+  sParse.bFts4 = bFts4;
   if( z==0 ){
     *ppExpr = 0;
     return SQLITE_OK;
@@ -930,7 +950,7 @@ static void fts3ExprTest(
   }
 
   rc = sqlite3Fts3ExprParse(
-      pTokenizer, azCol, nCol, nCol, zExpr, nExpr, &pExpr
+      pTokenizer, azCol, 0, nCol, nCol, zExpr, nExpr, &pExpr
   );
   if( rc!=SQLITE_OK && rc!=SQLITE_NOMEM ){
     sqlite3_result_error(context, "Error parsing expression", -1);
diff --git a/ext/fts3/fts3_hash.c b/ext/fts3/fts3_hash.c
index b7c3e8b5..57c59b58 100644
--- a/ext/fts3/fts3_hash.c
+++ b/ext/fts3/fts3_hash.c
@@ -30,7 +30,6 @@
 #include <stdlib.h>
 #include <string.h>
 
-#include "sqlite3.h"
 #include "fts3_hash.h"
 
 /*
diff --git a/ext/fts3/fts3_snippet.c b/ext/fts3/fts3_snippet.c
index b569eb13..23ef25c5 100644
--- a/ext/fts3/fts3_snippet.c
+++ b/ext/fts3/fts3_snippet.c
@@ -368,6 +368,7 @@ static int fts3SnippetFindPositions(Fts3Expr *pExpr, int iPhrase, void *ctx){
     int iFirst = 0;
     pPhrase->pList = pCsr;
     fts3GetDeltaPosition(&pCsr, &iFirst);
+    assert( iFirst>=0 );
     pPhrase->pHead = pCsr;
     pPhrase->pTail = pCsr;
     pPhrase->iHead = iFirst;
@@ -848,7 +849,7 @@ static int fts3MatchinfoSelectDoctotal(
 
   a = sqlite3_column_blob(pStmt, 0);
   a += sqlite3Fts3GetVarint(a, &nDoc);
-  if( nDoc==0 ) return SQLITE_CORRUPT_VTAB;
+  if( nDoc==0 ) return FTS_CORRUPT_VTAB;
   *pnDoc = (u32)nDoc;
 
   if( paLen ) *paLen = a;
@@ -1409,7 +1410,7 @@ void sqlite3Fts3Offsets(
 
       if( !pTerm ){
         /* All offsets for this column have been gathered. */
-        break;
+        rc = SQLITE_DONE;
       }else{
         assert( iCurrent<=iMinPos );
         if( 0==(0xFE&*pTerm->pList) ){
@@ -1426,8 +1427,8 @@ void sqlite3Fts3Offsets(
               "%d %d %d %d ", iCol, pTerm-sCtx.aTerm, iStart, iEnd-iStart
           );
           rc = fts3StringAppend(&res, aBuffer, -1);
-        }else if( rc==SQLITE_DONE ){
-          rc = SQLITE_CORRUPT_VTAB;
+        }else if( rc==SQLITE_DONE && pTab->zContentTbl==0 ){
+          rc = FTS_CORRUPT_VTAB;
         }
       }
     }
diff --git a/ext/fts3/fts3_test.c b/ext/fts3/fts3_test.c
index c5f72d84..72735f3d 100644
--- a/ext/fts3/fts3_test.c
+++ b/ext/fts3/fts3_test.c
@@ -19,6 +19,8 @@
 #include <string.h>
 #include <assert.h>
 
+#ifdef SQLITE_TEST
+
 /* Required so that the "ifdef SQLITE_ENABLE_FTS3" below works */
 #include "fts3Int.h"
 
@@ -319,3 +321,4 @@ int Sqlitetestfts3_Init(Tcl_Interp *interp){
   );
   return TCL_OK;
 }
+#endif                  /* ifdef SQLITE_TEST */
diff --git a/ext/fts3/fts3_tokenizer.c b/ext/fts3/fts3_tokenizer.c
index c4ad6a5c..6494bb96 100644
--- a/ext/fts3/fts3_tokenizer.c
+++ b/ext/fts3/fts3_tokenizer.c
@@ -23,12 +23,7 @@
 **     * The FTS3 module is being built into the core of
 **       SQLite (in which case SQLITE_ENABLE_FTS3 is defined).
 */
-#include "sqlite3ext.h"
-#ifndef SQLITE_CORE
-  SQLITE_EXTENSION_INIT1
-#endif
 #include "fts3Int.h"
-
 #if !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_FTS3)
 
 #include <assert.h>
diff --git a/ext/fts3/fts3_write.c b/ext/fts3/fts3_write.c
index 36f2249e..2904a9ac 100644
--- a/ext/fts3/fts3_write.c
+++ b/ext/fts3/fts3_write.c
@@ -256,7 +256,7 @@ static int fts3SqlStmt(
 /* 4  */  "DELETE FROM %Q.'%q_segdir'",
 /* 5  */  "DELETE FROM %Q.'%q_docsize'",
 /* 6  */  "DELETE FROM %Q.'%q_stat'",
-/* 7  */  "SELECT %s FROM %Q.'%q_content' AS x WHERE rowid=?",
+/* 7  */  "SELECT %s WHERE rowid=?",
 /* 8  */  "SELECT (SELECT max(idx) FROM %Q.'%q_segdir' WHERE level = ?) + 1",
 /* 9  */  "INSERT INTO %Q.'%q_segments'(blockid, block) VALUES(?, ?)",
 /* 10 */  "SELECT coalesce((SELECT max(blockid) FROM %Q.'%q_segments') + 1, 1)",
@@ -298,7 +298,7 @@ static int fts3SqlStmt(
     if( eStmt==SQL_CONTENT_INSERT ){
       zSql = sqlite3_mprintf(azSql[eStmt], p->zDb, p->zName, p->zWriteExprlist);
     }else if( eStmt==SQL_SELECT_CONTENT_BY_ROWID ){
-      zSql = sqlite3_mprintf(azSql[eStmt], p->zReadExprlist, p->zDb, p->zName);
+      zSql = sqlite3_mprintf(azSql[eStmt], p->zReadExprlist);
     }else{
       zSql = sqlite3_mprintf(azSql[eStmt], p->zDb, p->zName);
     }
@@ -341,7 +341,7 @@ static int fts3SelectDocsize(
     rc = sqlite3_step(pStmt);
     if( rc!=SQLITE_ROW || sqlite3_column_type(pStmt, 0)!=SQLITE_BLOB ){
       rc = sqlite3_reset(pStmt);
-      if( rc==SQLITE_OK ) rc = SQLITE_CORRUPT_VTAB;
+      if( rc==SQLITE_OK ) rc = FTS_CORRUPT_VTAB;
       pStmt = 0;
     }else{
       rc = SQLITE_OK;
@@ -409,17 +409,24 @@ static void fts3SqlExec(
 ** not what users expect when they get SQLITE_LOCKED_SHAREDCACHE. It can
 ** still happen if the user reads data directly from the %_segments or
 ** %_segdir tables instead of going through FTS3 though.
+**
+** This reasoning does not apply to a content=xxx table.
 */
 int sqlite3Fts3ReadLock(Fts3Table *p){
   int rc;                         /* Return code */
   sqlite3_stmt *pStmt;            /* Statement used to obtain lock */
 
-  rc = fts3SqlStmt(p, SQL_SELECT_CONTENT_BY_ROWID, &pStmt, 0);
-  if( rc==SQLITE_OK ){
-    sqlite3_bind_null(pStmt, 1);
-    sqlite3_step(pStmt);
-    rc = sqlite3_reset(pStmt);
+  if( p->zContentTbl==0 ){
+    rc = fts3SqlStmt(p, SQL_SELECT_CONTENT_BY_ROWID, &pStmt, 0);
+    if( rc==SQLITE_OK ){
+      sqlite3_bind_null(pStmt, 1);
+      sqlite3_step(pStmt);
+      rc = sqlite3_reset(pStmt);
+    }
+  }else{
+    rc = SQLITE_OK;
   }
+
   return rc;
 }
 
@@ -780,6 +787,18 @@ static int fts3InsertData(
   int rc;                         /* Return code */
   sqlite3_stmt *pContentInsert;   /* INSERT INTO %_content VALUES(...) */
 
+  if( p->zContentTbl ){
+    sqlite3_value *pRowid = apVal[p->nColumn+3];
+    if( sqlite3_value_type(pRowid)==SQLITE_NULL ){
+      pRowid = apVal[1];
+    }
+    if( sqlite3_value_type(pRowid)!=SQLITE_INTEGER ){
+      return SQLITE_CONSTRAINT;
+    }
+    *piDocid = sqlite3_value_int64(pRowid);
+    return SQLITE_OK;
+  }
+
   /* Locate the statement handle used to insert data into the %_content
   ** table. The SQL for this statement is:
   **
@@ -830,14 +849,16 @@ static int fts3InsertData(
 ** Remove all data from the FTS3 table. Clear the hash table containing
 ** pending terms.
 */
-static int fts3DeleteAll(Fts3Table *p){
+static int fts3DeleteAll(Fts3Table *p, int bContent){
   int rc = SQLITE_OK;             /* Return code */
 
   /* Discard the contents of the pending-terms hash table. */
   sqlite3Fts3PendingTermsClear(p);
 
-  /* Delete everything from the %_content, %_segments and %_segdir tables. */
-  fts3SqlExec(&rc, p, SQL_DELETE_ALL_CONTENT, 0);
+  /* Delete everything from the shadow tables. Except, leave %_content as
+  ** is if bContent is false.  */
+  assert( p->zContentTbl==0 || bContent==0 );
+  if( bContent ) fts3SqlExec(&rc, p, SQL_DELETE_ALL_CONTENT, 0);
   fts3SqlExec(&rc, p, SQL_DELETE_ALL_SEGMENTS, 0);
   fts3SqlExec(&rc, p, SQL_DELETE_ALL_SEGDIR, 0);
   if( p->bHasDocsize ){
@@ -1145,7 +1166,7 @@ static int fts3SegReaderNext(
   if( nPrefix<0 || nSuffix<=0 
    || &pNext[nSuffix]>&pReader->aNode[pReader->nNode] 
   ){
-    return SQLITE_CORRUPT_VTAB;
+    return FTS_CORRUPT_VTAB;
   }
 
   if( nPrefix+nSuffix>pReader->nTermAlloc ){
@@ -1175,7 +1196,7 @@ static int fts3SegReaderNext(
   if( &pReader->aDoclist[pReader->nDoclist]>&pReader->aNode[pReader->nNode] 
    || (pReader->nPopulate==0 && pReader->aDoclist[pReader->nDoclist-1])
   ){
-    return SQLITE_CORRUPT_VTAB;
+    return FTS_CORRUPT_VTAB;
   }
   return SQLITE_OK;
 }
@@ -2125,12 +2146,18 @@ static void fts3SegWriterFree(SegmentWriter *pWriter){
 static int fts3IsEmpty(Fts3Table *p, sqlite3_value *pRowid, int *pisEmpty){
   sqlite3_stmt *pStmt;
   int rc;
-  rc = fts3SqlStmt(p, SQL_IS_EMPTY, &pStmt, &pRowid);
-  if( rc==SQLITE_OK ){
-    if( SQLITE_ROW==sqlite3_step(pStmt) ){
-      *pisEmpty = sqlite3_column_int(pStmt, 0);
+  if( p->zContentTbl ){
+    /* If using the content=xxx option, assume the table is never empty */
+    *pisEmpty = 0;
+    rc = SQLITE_OK;
+  }else{
+    rc = fts3SqlStmt(p, SQL_IS_EMPTY, &pStmt, &pRowid);
+    if( rc==SQLITE_OK ){
+      if( SQLITE_ROW==sqlite3_step(pStmt) ){
+        *pisEmpty = sqlite3_column_int(pStmt, 0);
+      }
+      rc = sqlite3_reset(pStmt);
     }
-    rc = sqlite3_reset(pStmt);
   }
   return rc;
 }
@@ -2482,6 +2509,7 @@ int sqlite3Fts3SegReaderStep(
   int isColFilter =    (pCsr->pFilter->flags & FTS3_SEGMENT_COLUMN_FILTER);
   int isPrefix =       (pCsr->pFilter->flags & FTS3_SEGMENT_PREFIX);
   int isScan =         (pCsr->pFilter->flags & FTS3_SEGMENT_SCAN);
+  int isFirst =        (pCsr->pFilter->flags & FTS3_SEGMENT_FIRST);
 
   Fts3SegReader **apSegment = pCsr->apSegment;
   int nSegment = pCsr->nSegment;
@@ -2541,6 +2569,7 @@ int sqlite3Fts3SegReaderStep(
     assert( isIgnoreEmpty || (isRequirePos && !isColFilter) );
     if( nMerge==1 
      && !isIgnoreEmpty 
+     && !isFirst 
      && (p->bDescIdx==0 || fts3SegReaderIsPending(apSegment[0])==0)
     ){
       pCsr->nDoclist = apSegment[0]->nDoclist;
@@ -2606,12 +2635,24 @@ int sqlite3Fts3SegReaderStep(
             }
             pCsr->aBuffer = aNew;
           }
-          nDoclist += sqlite3Fts3PutVarint(&pCsr->aBuffer[nDoclist], iDelta);
-          iPrev = iDocid;
-          if( isRequirePos ){
-            memcpy(&pCsr->aBuffer[nDoclist], pList, nList);
-            nDoclist += nList;
-            pCsr->aBuffer[nDoclist++] = '\0';
+
+          if( isFirst ){
+            char *a = &pCsr->aBuffer[nDoclist];
+            int nWrite;
+           
+            nWrite = sqlite3Fts3FirstFilter(iDelta, pList, nList, a);
+            if( nWrite ){
+              iPrev = iDocid;
+              nDoclist += nWrite;
+            }
+          }else{
+            nDoclist += sqlite3Fts3PutVarint(&pCsr->aBuffer[nDoclist], iDelta);
+            iPrev = iDocid;
+            if( isRequirePos ){
+              memcpy(&pCsr->aBuffer[nDoclist], pList, nList);
+              nDoclist += nList;
+              pCsr->aBuffer[nDoclist++] = '\0';
+            }
           }
         }
 
@@ -2787,9 +2828,9 @@ static void fts3DecodeIntArray(
 ** a blob of varints.
 */
 static void fts3InsertDocsize(
-  int *pRC,         /* Result code */
-  Fts3Table *p,     /* Table into which to insert */
-  u32 *aSz          /* Sizes of each column */
+  int *pRC,                       /* Result code */
+  Fts3Table *p,                   /* Table into which to insert */
+  u32 *aSz                        /* Sizes of each column, in tokens */
 ){
   char *pBlob;             /* The BLOB encoding of the document size */
   int nBlob;               /* Number of bytes in the BLOB */
@@ -2911,6 +2952,86 @@ static int fts3DoOptimize(Fts3Table *p, int bReturnDone){
   return (rc==SQLITE_OK && bReturnDone && bSeenDone) ? SQLITE_DONE : rc;
 }
 
+/*
+** This function is called when the user executes the following statement:
+**
+**     INSERT INTO <tbl>(<tbl>) VALUES('rebuild');
+**
+** The entire FTS index is discarded and rebuilt. If the table is one 
+** created using the content=xxx option, then the new index is based on
+** the current contents of the xxx table. Otherwise, it is rebuilt based
+** on the contents of the %_content table.
+*/
+static int fts3DoRebuild(Fts3Table *p){
+  int rc;                         /* Return Code */
+
+  rc = fts3DeleteAll(p, 0);
+  if( rc==SQLITE_OK ){
+    u32 *aSz = 0;
+    u32 *aSzIns = 0;
+    u32 *aSzDel = 0;
+    sqlite3_stmt *pStmt = 0;
+    int nEntry = 0;
+
+    /* Compose and prepare an SQL statement to loop through the content table */
+    char *zSql = sqlite3_mprintf("SELECT %s" , p->zReadExprlist);
+    if( !zSql ){
+      rc = SQLITE_NOMEM;
+    }else{
+      rc = sqlite3_prepare_v2(p->db, zSql, -1, &pStmt, 0);
+      sqlite3_free(zSql);
+    }
+
+    if( rc==SQLITE_OK ){
+      int nByte = sizeof(u32) * (p->nColumn+1)*3;
+      aSz = (u32 *)sqlite3_malloc(nByte);
+      if( aSz==0 ){
+        rc = SQLITE_NOMEM;
+      }else{
+        memset(aSz, 0, nByte);
+        aSzIns = &aSz[p->nColumn+1];
+        aSzDel = &aSzIns[p->nColumn+1];
+      }
+    }
+
+    while( rc==SQLITE_OK && SQLITE_ROW==sqlite3_step(pStmt) ){
+      int iCol;
+      rc = fts3PendingTermsDocid(p, sqlite3_column_int64(pStmt, 0));
+      aSz[p->nColumn] = 0;
+      for(iCol=0; rc==SQLITE_OK && iCol<p->nColumn; iCol++){
+        const char *z = (const char *) sqlite3_column_text(pStmt, iCol+1);
+        rc = fts3PendingTermsAdd(p, z, iCol, &aSz[iCol]);
+        aSz[p->nColumn] += sqlite3_column_bytes(pStmt, iCol+1);
+      }
+      if( p->bHasDocsize ){
+        fts3InsertDocsize(&rc, p, aSz);
+      }
+      if( rc!=SQLITE_OK ){
+        sqlite3_finalize(pStmt);
+        pStmt = 0;
+      }else{
+        nEntry++;
+        for(iCol=0; iCol<=p->nColumn; iCol++){
+          aSzIns[iCol] += aSz[iCol];
+        }
+      }
+    }
+    if( p->bHasStat ){
+      fts3UpdateDocTotals(&rc, p, aSzIns, aSzDel, nEntry);
+    }
+    sqlite3_free(aSz);
+
+    if( pStmt ){
+      int rc2 = sqlite3_finalize(pStmt);
+      if( rc==SQLITE_OK ){
+        rc = rc2;
+      }
+    }
+  }
+
+  return rc;
+}
+
 /*
 ** Handle a 'special' INSERT of the form:
 **
@@ -2928,6 +3049,8 @@ static int fts3SpecialInsert(Fts3Table *p, sqlite3_value *pVal){
     return SQLITE_NOMEM;
   }else if( nVal==8 && 0==sqlite3_strnicmp(zVal, "optimize", 8) ){
     rc = fts3DoOptimize(p, 0);
+  }else if( nVal==7 && 0==sqlite3_strnicmp(zVal, "rebuild", 7) ){
+    rc = fts3DoRebuild(p);
 #ifdef SQLITE_TEST
   }else if( nVal>9 && 0==sqlite3_strnicmp(zVal, "nodesize=", 9) ){
     p->nNodeSize = atoi(&zVal[9]);
@@ -3008,6 +3131,7 @@ int sqlite3Fts3CacheDeferredDoclists(Fts3Cursor *pCsr){
         for(pDef=pCsr->pDeferred; pDef && rc==SQLITE_OK; pDef=pDef->pNext){
           Fts3PhraseToken *pPT = pDef->pToken;
           if( (pDef->iCol>=p->nColumn || pDef->iCol==i)
+           && (pPT->bFirst==0 || iPos==0)
            && (pPT->n==nToken || (pPT->isPrefix && pPT->n<nToken))
            && (0==memcmp(zToken, pPT->z, pPT->n))
           ){
@@ -3099,14 +3223,18 @@ static int fts3DeleteByRowid(
       /* Deleting this row means the whole table is empty. In this case
       ** delete the contents of all three tables and throw away any
       ** data in the pendingTerms hash table.  */
-      rc = fts3DeleteAll(p);
+      rc = fts3DeleteAll(p, 1);
       *pnDoc = *pnDoc - 1;
     }else{
       sqlite3_int64 iRemove = sqlite3_value_int64(pRowid);
       rc = fts3PendingTermsDocid(p, iRemove);
       fts3DeleteTerms(&rc, p, pRowid, aSzDel);
-      fts3SqlExec(&rc, p, SQL_DELETE_CONTENT, &pRowid);
-      if( sqlite3_changes(p->db) ) *pnDoc = *pnDoc - 1;
+      if( p->zContentTbl==0 ){
+        fts3SqlExec(&rc, p, SQL_DELETE_CONTENT, &pRowid);
+        if( sqlite3_changes(p->db) ) *pnDoc = *pnDoc - 1;
+      }else{
+        *pnDoc = *pnDoc - 1;
+      }
       if( p->bHasDocsize ){
         fts3SqlExec(&rc, p, SQL_DELETE_DOCSIZE, &pRowid);
       }
@@ -3129,7 +3257,6 @@ int sqlite3Fts3UpdateMethod(
   Fts3Table *p = (Fts3Table *)pVtab;
   int rc = SQLITE_OK;             /* Return Code */
   int isRemove = 0;               /* True for an UPDATE or DELETE */
-  sqlite3_int64 iRemove = 0;      /* Rowid removed by UPDATE or DELETE */
   u32 *aSzIns = 0;                /* Sizes of inserted documents */
   u32 *aSzDel;                    /* Sizes of deleted documents */
   int nChng = 0;                  /* Net change in number of documents */
@@ -3167,7 +3294,7 @@ int sqlite3Fts3UpdateMethod(
   ** detect the conflict and return SQLITE_CONSTRAINT before beginning to
   ** modify the database file.
   */
-  if( nArg>1 ){
+  if( nArg>1 && p->zContentTbl==0 ){
     /* Find the value object that holds the new rowid value. */
     sqlite3_value *pNewRowid = apVal[3+p->nColumn];
     if( sqlite3_value_type(pNewRowid)==SQLITE_NULL ){
@@ -3212,19 +3339,21 @@ int sqlite3Fts3UpdateMethod(
     assert( sqlite3_value_type(apVal[0])==SQLITE_INTEGER );
     rc = fts3DeleteByRowid(p, apVal[0], &nChng, aSzDel);
     isRemove = 1;
-    iRemove = sqlite3_value_int64(apVal[0]);
   }
   
   /* If this is an INSERT or UPDATE operation, insert the new record. */
   if( nArg>1 && rc==SQLITE_OK ){
     if( bInsertDone==0 ){
       rc = fts3InsertData(p, apVal, pRowid);
-      if( rc==SQLITE_CONSTRAINT ) rc = SQLITE_CORRUPT_VTAB;
+      if( rc==SQLITE_CONSTRAINT && p->zContentTbl==0 ){
+        rc = FTS_CORRUPT_VTAB;
+      }
     }
-    if( rc==SQLITE_OK && (!isRemove || *pRowid!=iRemove) ){
+    if( rc==SQLITE_OK && (!isRemove || *pRowid!=p->iPrevDocid ) ){
       rc = fts3PendingTermsDocid(p, *pRowid);
     }
     if( rc==SQLITE_OK ){
+      assert( p->iPrevDocid==*pRowid );
       rc = fts3InsertTerms(p, apVal, aSzIns);
     }
     if( p->bHasDocsize ){
diff --git a/ext/rtree/rtree.c b/ext/rtree/rtree.c
index 2375069e..884482ea 100644
--- a/ext/rtree/rtree.c
+++ b/ext/rtree/rtree.c
@@ -1268,7 +1268,8 @@ static int rtreeFilter(
         rc = SQLITE_NOMEM;
       }else{
         memset(pCsr->aConstraint, 0, sizeof(RtreeConstraint)*argc);
-        assert( (idxStr==0 && argc==0) || (int)strlen(idxStr)==argc*2 );
+        assert( (idxStr==0 && argc==0)
+                || (idxStr && (int)strlen(idxStr)==argc*2) );
         for(ii=0; ii<argc; ii++){
           RtreeConstraint *p = &pCsr->aConstraint[ii];
           p->op = idxStr[ii*2];
@@ -1569,7 +1570,10 @@ static int ChooseLeaf(
 
     float fMinGrowth = 0.0;
     float fMinArea = 0.0;
+#if VARIANT_RSTARTREE_CHOOSESUBTREE
     float fMinOverlap = 0.0;
+    float overlap;
+#endif
 
     int nCell = NCELL(pNode);
     RtreeCell cell;
@@ -1601,7 +1605,6 @@ static int ChooseLeaf(
       int bBest = 0;
       float growth;
       float area;
-      float overlap = 0.0;
       nodeGetCell(pRtree, pNode, iCell, &cell);
       growth = cellGrowth(pRtree, &cell, pCell);
       area = cellArea(pRtree, &cell);
@@ -1609,6 +1612,8 @@ static int ChooseLeaf(
 #if VARIANT_RSTARTREE_CHOOSESUBTREE
       if( ii==(pRtree->iDepth-1) ){
         overlap = cellOverlapEnlargement(pRtree,&cell,pCell,aCell,nCell,iCell);
+      }else{
+        overlap = 0.0;
       }
       if( (iCell==0) 
        || (overlap<fMinOverlap) 
@@ -1616,6 +1621,7 @@ static int ChooseLeaf(
        || (overlap==fMinOverlap && growth==fMinGrowth && area<fMinArea)
       ){
         bBest = 1;
+        fMinOverlap = overlap;
       }
 #else
       if( iCell==0||growth<fMinGrowth||(growth==fMinGrowth && area<fMinArea) ){
@@ -1623,7 +1629,6 @@ static int ChooseLeaf(
       }
 #endif
       if( bBest ){
-        fMinOverlap = overlap;
         fMinGrowth = growth;
         fMinArea = area;
         iBest = cell.iRowid;
diff --git a/main.mk b/main.mk
index 33b2e6ec..4360d862 100644
--- a/main.mk
+++ b/main.mk
@@ -65,8 +65,8 @@ LIBOBJ+= alter.o analyze.o attach.o auth.o \
          random.o resolve.o rowset.o rtree.o select.o status.o \
          table.o tokenize.o trigger.o \
          update.o util.o vacuum.o \
-         vdbe.o vdbeapi.o vdbeaux.o vdbeblob.o vdbemem.o vdbetrace.o \
-         wal.o walker.o where.o utf.o vtab.o
+         vdbe.o vdbeapi.o vdbeaux.o vdbeblob.o vdbemem.o vdbesort.o \
+	 vdbetrace.o wal.o walker.o where.o utf.o vtab.o
 
 
 
@@ -155,6 +155,7 @@ SRC = \
   $(TOP)/src/vdbeaux.c \
   $(TOP)/src/vdbeblob.c \
   $(TOP)/src/vdbemem.c \
+  $(TOP)/src/vdbesort.c \
   $(TOP)/src/vdbetrace.c \
   $(TOP)/src/vdbeInt.h \
   $(TOP)/src/vtab.c \
@@ -361,6 +362,9 @@ sqlite3$(EXE):	$(TOP)/src/shell.c libsqlite3.a sqlite3.h
 		$(TOP)/src/shell.c                                  \
 		libsqlite3.a $(LIBREADLINE) $(TLIBS) $(THREADLIB)
 
+sqlite3.o:	sqlite3.c
+	$(TCCX) -c sqlite3.c
+
 # This target creates a directory named "tsrc" and fills it with
 # copies of all of the C source code and header files needed to
 # build on the target system.  Some of the C source code and header
@@ -383,6 +387,17 @@ sqlite3.c:	target_source $(TOP)/tool/mksqlite3c.tcl
 	echo '#endif /* USE_SYSTEM_SQLITE */' >>tclsqlite3.c
 	cat $(TOP)/src/tclsqlite.c >>tclsqlite3.c
 
+sqlite3.c-debug:	target_source $(TOP)/tool/mksqlite3c.tcl
+	tclsh $(TOP)/tool/mksqlite3c.tcl --linemacros
+	echo '#ifndef USE_SYSTEM_SQLITE' >tclsqlite3.c
+	cat sqlite3.c >>tclsqlite3.c
+	echo '#endif /* USE_SYSTEM_SQLITE */' >>tclsqlite3.c
+	echo '#line 1 "tclsqlite.c"' >>tclsqlite3.c
+	cat $(TOP)/src/tclsqlite.c >>tclsqlite3.c
+
+sqlite3-all.c:	sqlite3.c $(TOP)/tool/split-sqlite3c.tcl
+	tclsh $(TOP)/tool/split-sqlite3c.tcl
+
 fts2amal.c:	target_source $(TOP)/ext/fts2/mkfts2amal.tcl
 	tclsh $(TOP)/ext/fts2/mkfts2amal.tcl
 
@@ -417,7 +432,7 @@ tclsqlite.o:	$(TOP)/src/tclsqlite.c $(HDR)
 # Rules to build opcodes.c and opcodes.h
 #
 opcodes.c:	opcodes.h $(TOP)/mkopcodec.awk
-	sort -n -b -k 3 opcodes.h | $(NAWK) -f $(TOP)/mkopcodec.awk >opcodes.c
+	$(NAWK) -f $(TOP)/mkopcodec.awk opcodes.h >opcodes.c
 
 opcodes.h:	parse.h $(TOP)/src/vdbe.c $(TOP)/mkopcodeh.awk
 	cat parse.h $(TOP)/src/vdbe.c | \
@@ -506,6 +521,16 @@ tclsqlite3:	$(TOP)/src/tclsqlite.c libsqlite3.a
 	$(TCCX) $(TCL_FLAGS) -DTCLSH=1 -o tclsqlite3 \
 		$(TOP)/src/tclsqlite.c libsqlite3.a $(LIBTCL) $(THREADLIB)
 
+sqlite3_analyzer.c: sqlite3.c $(TOP)/src/test_stat.c $(TOP)/src/tclsqlite.c $(TOP)/tool/spaceanal.tcl
+	echo "#define TCLSH 2" > $@
+	cat sqlite3.c $(TOP)/src/test_stat.c $(TOP)/src/tclsqlite.c >> $@
+	echo "static const char *tclsh_main_loop(void){" >> $@
+	echo "static const char *zMainloop = " >> $@
+	$(NAWK) -f $(TOP)/tool/tostr.awk $(TOP)/tool/spaceanal.tcl >> $@
+	echo "; return zMainloop; }" >> $@
+
+sqlite3_analyzer$(EXE): sqlite3_analyzer.c
+	$(TCCX) $(TCL_FLAGS) sqlite3_analyzer.c -o $@ $(LIBTCL) $(THREADLIB) 
 
 # Rules to build the 'testfixture' application.
 #
@@ -548,16 +573,6 @@ threadtest3$(EXE): sqlite3.o $(TOP)/test/threadtest3.c $(TOP)/test/tt3_checkpoin
 threadtest: threadtest3$(EXE)
 	./threadtest3$(EXE)
 
-sqlite3_analyzer$(EXE):	$(TOP)/src/tclsqlite.c sqlite3.c $(TESTSRC) \
-			$(TOP)/tool/spaceanal.tcl
-	$(NAWK) -f $(TOP)/tool/tostr.awk $(TOP)/tool/spaceanal.tcl \
-		 >spaceanal_tcl.h
-	$(TCCX) $(TCL_FLAGS) -DTCLSH=2 $(TESTFIXTURE_FLAGS)                    \
-		-DSQLITE_TEST=1 -DSQLITE_PRIVATE=""                            \
-		$(TESTSRC) $(TOP)/src/tclsqlite.c sqlite3.c                    \
-		-o sqlite3_analyzer$(EXE)                                      \
-		$(LIBTCL) $(THREADLIB)
-
 TEST_EXTENSION = $(SHPREFIX)testloadext.$(SO)
 $(TEST_EXTENSION): $(TOP)/src/test_loadext.c
 	$(MKSHLIB) $(TOP)/src/test_loadext.c -o $(TEST_EXTENSION)
@@ -565,6 +580,13 @@ $(TEST_EXTENSION): $(TOP)/src/test_loadext.c
 extensiontest: testfixture$(EXE) $(TEST_EXTENSION)
 	./testfixture$(EXE) $(TOP)/test/loadext.test
 
+# This target will fail if the SQLite amalgamation contains any exported
+# symbols that do not begin with "sqlite3_". It is run as part of the
+# releasetest.tcl script.
+#
+checksymbols: sqlite3.o
+	nm -g --defined-only sqlite3.o | grep -v " sqlite3_" ; test $$? -ne 0
+
 
 # Standard install and cleanup targets
 #
@@ -574,10 +596,16 @@ install:	sqlite3 libsqlite3.a sqlite3.h
 	mv sqlite3.h /usr/include
 
 clean:	
-	rm -f *.o sqlite3 libsqlite3.a sqlite3.h opcodes.*
-	rm -f lemon lempar.c parse.* sqlite*.tar.gz mkkeywordhash keywordhash.h
+	rm -f *.o sqlite3 sqlite3.exe libsqlite3.a sqlite3.h opcodes.*
+	rm -f lemon lemon.exe lempar.c parse.* sqlite*.tar.gz
+	rm -f mkkeywordhash mkkeywordhash.exe keywordhash.h
 	rm -f $(PUBLISH)
 	rm -f *.da *.bb *.bbg gmon.out
 	rm -rf tsrc target_source
 	rm -f testloadext.dll libtestloadext.so
+	rm -f amalgamation-testfixture amalgamation-testfixture.exe
+	rm -f fts3-testfixture fts3-testfixture.exe
+	rm -f testfixture testfixture.exe
+	rm -f threadtest3 threadtest3.exe
 	rm -f sqlite3.c fts?amal.c tclsqlite3.c
+	rm -f sqlite3_analyzer sqlite3_analyzer.exe sqlite3_analyzer.c
diff --git a/manifest b/manifest
index b2251f24..307b0c39 100644
--- a/manifest
+++ b/manifest
@@ -1,12 +1,12 @@
-C Release\scandidate\s3.7.7.1.
-D 2011-06-28T17:39:05.200
+C Version\s3.7.9
+D 2011-11-01T00:52:41.132
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
-F Makefile.in c1d7a7f4fd8da6b1815032efca950e3d5125407e
+F Makefile.in a162fe39e249b8ed4a65ee947c30152786cfe897
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
-F Makefile.msc 11082f65b452b908d93013292c17850378c39284
-F Makefile.vxworks c85ec1d8597fe2f7bc225af12ac1666e21379151
+F Makefile.msc dcad80fa69f17d46fe6778ba873fc108ca16298d
+F Makefile.vxworks 1deb39c8bb047296c30161ffa10c1b5423e632f9
 F README cd04a36fbc7ea56932a4052d7d0b7f09f27c33d6
-F VERSION 5d587aa6adf86fd587768fe736359bd9f5e43890
+F VERSION bb37c274b503bbe73f00ea4f374eb817cba4b171
 F aclocal.m4 a5c22d164aff7ed549d53a90fa56d56955281f50
 F addopcodes.awk 17dc593f791f874d2c23a0f9360850ded0286531
 F art/2005osaward.gif 0d1851b2a7c1c9d0ccce545f3e14bca42d7fd248
@@ -23,10 +23,10 @@ F art/src_logo.gif 9341ef09f0e53cd44c0c9b6fc3c16f7f3d6c2ad9
 F config.guess 226d9a188c6196f3033ffc651cbc9dcee1a42977
 F config.h.in 405a958bdb3af382a809dccb08a44694923ddd61
 F config.sub 9ebe4c3b3dab6431ece34f16828b594fb420da55
-F configure b8e6049719c5f649670388236e2253183243b873 x
+F configure 806c06aef5895860da49600ce098dbe4d5a8435c x
 F configure.ac 298a759c086e72c013da459c2aec02a104f4224f
 F contrib/sqlitecon.tcl 210a913ad63f9f991070821e599d600bd913e0ad
-F doc/lemon.html f0f682f50210928c07e562621c3b7e8ab912a538
+F doc/lemon.html 3091574143dd3415669b6745843ff8d011d33549
 F doc/pager-invariants.txt 870107036470d7c419e93768676fae2f8749cf9e
 F doc/vfs-shm.txt e101f27ea02a8387ce46a05be2b1a902a021d37a
 F ext/README.txt 913a7bd3f4837ab14d7e063304181787658b14e1
@@ -59,32 +59,33 @@ F ext/fts2/fts2_tokenizer.c 26e993a00b2bd5b6e73c155597361710b12ffe25
 F ext/fts2/fts2_tokenizer.h a7e46462d935a314b2682287f12f27530a3ee08e
 F ext/fts2/fts2_tokenizer1.c 0123d21078e053bd98fd6186c5c6dc6d67969f2e
 F ext/fts2/mkfts2amal.tcl 974d5d438cb3f7c4a652639262f82418c1e4cff0
+F ext/fts3/README.content fdc666a70d5257a64fee209f97cf89e0e6e32b51
 F ext/fts3/README.syntax a19711dc5458c20734b8e485e75fb1981ec2427a
 F ext/fts3/README.tokenizers 998756696647400de63d5ba60e9655036cb966e9
 F ext/fts3/README.txt 8c18f41574404623b76917b9da66fcb0ab38328d
-F ext/fts3/fts3.c ca776037493d0081da70a6afc0df80f5ce347cb7
+F ext/fts3/fts3.c 246ef2d0cef67517d156d39c9247cd6c432f0d79
 F ext/fts3/fts3.h 3a10a0af180d502cecc50df77b1b22df142817fe
-F ext/fts3/fts3Int.h fa493ccbad78a2c99ad1c984f651c0c202e68536
+F ext/fts3/fts3Int.h def7a900f98c5ab5fa4772e922bfa219d5097f05
 F ext/fts3/fts3_aux.c 0ebfa7b86cf8ff6a0861605fcc63b83ec1b70691
-F ext/fts3/fts3_expr.c 23791de01b3a5d313d76e02befd2601d4096bc2b
-F ext/fts3/fts3_hash.c aad95afa01cf2a5ffaa448e4b0ab043880cd1efb
+F ext/fts3/fts3_expr.c f5df26bddf46a5916b2a5f80c4027996e92b7b15
+F ext/fts3/fts3_hash.c 8dd2d06b66c72c628c2732555a32bc0943114914
 F ext/fts3/fts3_hash.h 8331fb2206c609f9fc4c4735b9ab5ad6137c88ec
 F ext/fts3/fts3_icu.c 6c8f395cdf9e1e3afa7fadb7e523dbbf381c6dfa
 F ext/fts3/fts3_porter.c 8d946908f4812c005d3d33fcbe78418b1f4eb70c
-F ext/fts3/fts3_snippet.c 58b2ba2b934c1e2a2f6ac857d7f3c7e1a14b4532
+F ext/fts3/fts3_snippet.c 1f9ee6a8e0e242649645968dcec4deb253d86c2a
 F ext/fts3/fts3_term.c a5457992723455a58804cb75c8cbd8978db5c2ef
-F ext/fts3/fts3_test.c c0aae3219df989d3e827d07846097adf8cb09945
-F ext/fts3/fts3_tokenizer.c 6089986ebcfc19d4b7aabd2b92773368efa4354f
+F ext/fts3/fts3_test.c 24fa13f330db011500acb95590da9eee24951894
+F ext/fts3/fts3_tokenizer.c 9ff7ec66ae3c5c0340fa081958e64f395c71a106
 F ext/fts3/fts3_tokenizer.h 13ffd9fcb397fec32a05ef5cd9e0fa659bf3dbd3
 F ext/fts3/fts3_tokenizer1.c 0dde8f307b8045565cf63797ba9acfaff1c50c68
-F ext/fts3/fts3_write.c 194829c8fd024a448fc899e5ff02a8ed06595529
+F ext/fts3/fts3_write.c c097228bff4d33c6b8a270c9717b9f8339068776
 F ext/fts3/fts3speed.tcl b54caf6a18d38174f1a6e84219950d85e98bb1e9
 F ext/fts3/mkfts3amal.tcl 252ecb7fe6467854f2aa237bf2c390b74e71f100
 F ext/icu/README.txt bf8461d8cdc6b8f514c080e4e10dc3b2bbdfefa9
 F ext/icu/icu.c eb9ae1d79046bd7871aa97ee6da51eb770134b5a
 F ext/icu/sqliteicu.h 728867a802baa5a96de7495e9689a8e01715ef37
 F ext/rtree/README 6315c0d73ebf0ec40dedb5aa0e942bc8b54e3761
-F ext/rtree/rtree.c b431c54d1ed05f04f2987e8a4fbb931acb40c312
+F ext/rtree/rtree.c 692e9192d148f318b3dca9f744600346a175eedd
 F ext/rtree/rtree.h 834dbcb82dc85b2481cde6a07cdadfddc99e9b9e
 F ext/rtree/rtree1.test 28e1b8da4da98093ce3210187434dd760a8d89d8
 F ext/rtree/rtree2.test acbb3a4ce0f4fbc2c304d2b4b784cfa161856bba
@@ -104,11 +105,11 @@ F ext/rtree/tkt3363.test 142ab96eded44a3615ec79fba98c7bde7d0f96de
 F ext/rtree/viewrtree.tcl eea6224b3553599ae665b239bd827e182b466024
 F install-sh 9d4de14ab9fb0facae2f48780b874848cbf2f895 x
 F ltmain.sh 3ff0879076df340d2e23ae905484d8c15d5fdea8
-F main.mk d799fb600383cee11fed58876a7cccb749dd2614
+F main.mk ac48970ca7506c9034f5c7b2212111fbeb0a1aaa
 F mkdll.sh 7d09b23c05d56532e9d44a50868eb4b12ff4f74a
 F mkextu.sh 416f9b7089d80e5590a29692c9d9280a10dbad9f
 F mkextw.sh 4123480947681d9b434a5e7b1ee08135abe409ac
-F mkopcodec.awk 3fb9bf077053c968451f4dd03d11661ac373f9d1
+F mkopcodec.awk f6fccee29e68493bfd90a2e0466ede5fa94dd2fc
 F mkopcodeh.awk 29b84656502eee5f444c3147f331ee686956ab0e
 F mkso.sh fd21c06b063bb16a5d25deea1752c2da6ac3ed83
 F publish.sh 313c5b2425f2cf5e547db7549a9796acc4508f22
@@ -118,90 +119,90 @@ F sqlite.pc.in 42b7bf0d02e08b9e77734a47798d1a55a9e0716b
 F sqlite3.1 6be1ad09113570e1fc8dcaff84c9b0b337db5ffc
 F sqlite3.pc.in ae6f59a76e862f5c561eb32a380228a02afc3cad
 F src/alter.c ac80a0f31189f8b4a524ebf661e47e84536ee7f5
-F src/analyze.c a425d62e8fa9ebcb4359ab84ff0c62c6563d2e2a
+F src/analyze.c 5a1db16a651ce6310c8b046b2cbb736e030e14b9
 F src/attach.c 12c6957996908edc31c96d7c68d4942c2474405f
 F src/auth.c 523da7fb4979469955d822ff9298352d6b31de34
-F src/backup.c 986c15232757f2873dff35ee3b35cbf935fc573c
+F src/backup.c 4368158da74d4711888e03264105c5c527d76caf
 F src/bitvec.c af50f1c8c0ff54d6bdb7a80e2fceca5a93670bef
 F src/btmutex.c 976f45a12e37293e32cae0281b15a21d48a8aaa7
-F src/btree.c 8c46f0ab69ad9549c75a3a91fed87abdaa743e2f
+F src/btree.c 32199e2d939233ade25340eaba450f818b37c079
 F src/btree.h f5d775cd6cfc7ac32a2535b70e8d2af48ef5f2ce
 F src/btreeInt.h 67978c014fa4f7cc874032dd3aacadd8db656bc3
-F src/build.c 5a428625d21ad409514afb40ad083bee25dd957a
+F src/build.c 8af67a08a852ff4c63701963cb1ab7166f577814
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 F test/eqp.test f14fadd76da53405e9885e2431cacf7191d83cdb
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 F test/eval.test bc269c365ba877554948441e91ad5373f9f91be3
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 F test/fkey1.test 01c7de578e11747e720c2d9aeef27f239853c4da
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 F test/fkey4.test c6c8f9f9be885f95c85c7bceb26f243ad906fd49
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 F test/format4.test 1f0cac8ff3895e9359ed87e41aaabee982a812eb
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 F test/fts1a.test 46090311f85da51bb33bd5ce84f7948359c6d8d7
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 F test/fts1c.test 85a525ce7428907469b4cce13d5563ce542ce64c
@@ -411,12 +417,12 @@ F test/fts1d.test a73deace5c18df4a549b12908bade4f05dcf1a2f
 F test/fts1e.test 77244843e925560b5a0b70069c3e7ab62f181ed2
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 F test/fts1k.test 65d3b41487b9f738d11b0f00eca375c0ca6bd970
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 F test/fts1n.test a2317dcd27b1d087ee3878b30e0a59c593c98b7a
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 F test/fts1porter.test d86e9c3e0c7f8ff95add6582b4b585fb4e02b96d
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 F test/fts2a.test 473a5c8b473a4e21a8e3fddaed1e59666e0c6ab7
@@ -428,12 +434,12 @@ F test/fts2f.test cf84096235991709c1e61caa389632aa0a4f976d
 F test/fts2g.test d49d6f6c900e6e20a0fb980ec1cd568dee12af76
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 F test/fts2k.test c7ebf4a4937594aa07459e3e1bca1251c1be8659
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 F test/fts2n.test 12b9c5352128cebd1c6b8395e43788d4b09087c2
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 F test/fts2p.test 4b48c35c91e6a7dbf5ac8d1e5691823cc999aafb
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 F test/fts2r.test b154c30b63061d8725e320fba1a39e2201cadd5e
@@ -449,14 +455,14 @@ F test/fts3af.test d394978c534eabf22dd0837e718b913fd66b499c
 F test/fts3ag.test 0b7d303f61ae5d620c4efb5e825713ea34ff9441
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 F test/fts3ak.test bd14deafe9d1586e8e9bf032411026ac4f8c925d
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 F test/fts3an.test a49ccadc07a2f7d646ec1b81bc09da2d85a85b18
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 F test/fts3atoken.test 402ef2f7c2fb4b3d4fa0587df6441c1447e799b3
-F test/fts3auto.test f1cb0a55130897013ca5850dbee2945c2908a45a
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 F test/fts3aux1.test 0b02743955d56fc0d4d66236a26177bd1b726de0
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@@ -465,65 +471,70 @@ F test/fts3conf.test 8e65ea56f88ced6cdd2252bdddb1a8327ae5af7e
 F test/fts3corrupt.test 7b0f91780ca36118d73324ec803187208ad33b32
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 F test/fts3defer2.test 35867d33ba6db03f6c73bd6f5fc333ae14f68c81
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 F test/fts3e.test 1f6c6ac9cc8b772ca256e6b22aaeed50c9350851
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 F test/fts3near.test 2e318ee434d32babd27c167142e2b94ddbab4844
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 F test/fts3query.test ef79d31fdb355d094baec1c1b24b60439a1fb8a2
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+F test/vtabC.test 4528f459a13136f982e75614d120aef165f17292
 F test/vtabD.test 74167b1578e5886fe4c886d6bef2fd1406444c42
 F test/vtabE.test 7c4693638d7797ce2eda17af74292b97e705cc61
+F test/vtabF.test fd5ad376f5a34fe0891df1f3cddb4fe7c3eb077e
 F test/vtab_alter.test 9e374885248f69e251bdaacf480b04a197f125e5
 F test/vtab_err.test 0d4d8eb4def1d053ac7c5050df3024fd47a3fbd8
 F test/vtab_shared.test 0eff9ce4f19facbe0a3e693f6c14b80711a4222d
-F test/wal.test 5617ad308bfdb8a8885220d8a261a6096a8d7e57
-F test/wal2.test aa0fb2314b3235be4503c06873e41ebfc0757782
-F test/wal3.test 5c396cc22497244d627306f4c1d360167353f8dd
-F test/wal4.test 3404b048fa5e10605facaf70384e6d2943412e30
-F test/wal5.test f06a0427e06db00347e32eb9fa99d6a5c0f2d088
-F test/wal6.test 07aa31ca8892d0527f2c5c5a9a2a87aa421dfaa8
+F test/wal.test e11da8d5ea8a38a247339455098357e9adf63d76
+F test/wal2.test ad6412596815f553cd30f271d291ab003092bc7e
+F test/wal3.test 18da4e65c30c43c646ad40e145e9a074e4062fc9
+F test/wal4.test 4744e155cd6299c6bd99d3eab1c82f77db9cdb3c
+F test/wal5.test 1bbfaa316dc2a1d0d1fac3f4500c38a90055a41b
+F test/wal6.test 2e3bc767d9c2ce35c47106148d43fcbd072a93b3
 F test/wal7.test 2ae8f427d240099cc4b2dfef63cff44e2a68a1bd
 F test/wal_common.tcl a98f17fba96206122eff624db0ab13ec377be4fe
-F test/walbak.test 4df1c7369da0301caeb9a48fa45997fd592380e4
-F test/walbig.test e882bc1d014afffbfa2b6ba36e0f07d30a633ad0
-F test/walcksum.test a37b36375c595e61bdb7e1ec49b5f0979b6fc7ce
-F test/walcrash.test e763841551d6b23677ccb419797c1589dcbdbaf5
+F test/walbak.test b9f68e39646375c2b877be906babcc15d38b4877
+F test/walbig.test 0ab8a430ef420a3114f7092e0f30fc9585ffa155
+F test/walcksum.test f5447800a157c9e2234fbb8e80243f0813941bde
+F test/walcrash.test 4fcb661faf71db91214156d52d43ee327f52bde1
 F test/walcrash2.test 019d60b89d96c1937adb2b30b850ac7e86e5a142
-F test/walfault.test 58fce626359c9376fe35101b5c0f2df8040aa839
+F test/walfault.test efb0d5724893133e71b8d9d90abdb781845a6bb0
 F test/walhook.test ed00a40ba7255da22d6b66433ab61fab16a63483
-F test/walmode.test 22ddccd073c817ac9ead62b88ac446e8dedc7d2c
-F test/walnoshm.test a074428046408f4eb5c6a00e09df8cc97ff93317
-F test/walro.test 2d5d69e2e99da19ce6faab340330234fc4ca0720
+F test/walmode.test 4022fe03ae6e830583672caa101f046438a0473c
+F test/walnoshm.test 84ca10c544632a756467336b7c3b864d493ee496
+F test/walpersist.test fd40d33765b2693f721c90c66d97f99757559006
+F test/walro.test e6bb27762c9f22601cbb8bff6e0acfd124e74b63
 F test/walshared.test 6dda2293880c300baf5d791c307f653094585761
-F test/walslow.test d21625e2e99e11c032ce949e8a94661576548933
-F test/walthread.test a25a393c068a2b42b44333fa3fdaae9072f1617c
+F test/walslow.test e7be6d9888f83aa5d3d3c7c08aa9b5c28b93609a
+F test/walthread.test a2ed5270eb695284d4ad27d252517bdc3317ee2a
 F test/where.test de337a3fe0a459ec7c93db16a519657a90552330
 F test/where2.test 43d4becaf5a5df854e6c21d624a1cb84c6904554
-F test/where3.test 8e1175c7ef710c70502858fc4fb08d784b3620b9
+F test/where3.test 667e75642102c97a00bf9b23d3cb267db321d006
 F test/where4.test e9b9e2f2f98f00379e6031db6a6fca29bae782a2
 F test/where5.test fdf66f96d29a064b63eb543e28da4dfdccd81ad2
 F test/where6.test 5da5a98cec820d488e82708301b96cb8c18a258b
-F test/where7.test aa4cfcd6f66e2a4ef87b6717327325bf4d547502
+F test/where7.test 814d7373413398e074f134cff5f8872e2c08bd3b
 F test/where8.test a6c740fd286d7883e274e17b6230a9d672a7ab1f
 F test/where8m.test da346596e19d54f0aba35ebade032a7c47d79739
-F test/where9.test 24f19ad14bb1b831564ced5273e681e495662848
+F test/where9.test bed66dcfc69a54a99661c0c9906189cb5e58f4e2
 F test/whereA.test 24c234263c8fe358f079d5e57d884fb569d2da0a
 F test/whereB.test 0def95db3bdec220a731c7e4bec5930327c1d8c5
 F test/wherelimit.test 5e9fd41e79bb2b2d588ed999d641d9c965619b31
+F test/win32lock.test b2a539e85ae6b2d78475e016a9636b4451dc7fb9
 F test/zeroblob.test caaecfb4f908f7bc086ed238668049f96774d688
 F tool/build-shell.sh 12aa4391073a777fcb6dcc490b219a018ae98bac
 F tool/diffdb.c 7524b1b5df217c20cd0431f6789851a4e0cb191b
+F tool/extract.c 054069d81b095fbdc189a6f5d4466e40380505e2
 F tool/fragck.tcl 5265a95126abcf6ab357f7efa544787e5963f439
 F tool/genfkey.README cf68fddd4643bbe3ff8e31b8b6d8b0a1b85e20f4
 F tool/genfkey.test 4196a8928b78f51d54ef58e99e99401ab2f0a7e5
 F tool/getlock.c f4c39b651370156cae979501a7b156bdba50e7ce
-F tool/lemon.c d51c68d405ff7f9bad99268ca3c20a198eb983ed
+F tool/lemon.c 949328f67cac94969d3112b105b8457edf27f44e
 F tool/lempar.c 01ca97f87610d1dac6d8cd96ab109ab1130e76dc
 F tool/mkkeywordhash.c d2e6b4a5965e23afb80fbe74bb54648cd371f309
 F tool/mkopts.tcl 66ac10d240cc6e86abd37dc908d50382f84ff46e
 F tool/mkspeedsql.tcl a1a334d288f7adfe6e996f2e712becf076745c97
-F tool/mksqlite3c.tcl 1fa0ed9cfdc768bf5de7e65fda8d97a46dd2a7e6
+F tool/mksqlite3c-noext.tcl 105023aa86f696a74b1d6a4929d1e1c3baf9471c
+F tool/mksqlite3c.tcl 9fbac513cd9d5ac95ad55630f49bb16c5347ab75
 F tool/mksqlite3h.tcl 78013ad79a5e492e5f764f3c7a8ef834255061f8
 F tool/mksqlite3internalh.tcl 7b43894e21bcb1bb39e11547ce7e38a063357e87
-F tool/omittest.tcl 8086c014cbae90f1f2b564d59d05a5e4ac1783c9
+F tool/offsets.c fe4262fdfa378e8f5499a42136d17bf3b98f6091
+F tool/omittest.tcl 72a49b8a9a8b0bf213a438180307a0df836d4380
 F tool/opcodeDoc.awk b3a2a3d5d3075b8bd90b7afe24283efdd586659c
 F tool/restore_jrnl.tcl 6957a34f8f1f0f8285e07536225ec3b292a9024a
 F tool/rollback-test.c 9fc98427d1e23e84429d7e6d07d9094fbdec65a5
@@ -938,18 +961,21 @@ F tool/showjournal.c b62cecaab86a4053d944c276bb5232e4d17ece02
 F tool/showwal.c f09e5a80a293919290ec85a6a37c85a5ddcf37d9
 F tool/soak1.tcl 8d407956e1a45b485a8e072470a3e629a27037fe
 F tool/space_used.tcl f714c41a59e326b8b9042f415b628b561bafa06b
-F tool/spaceanal.tcl b91879d52bf77a1ff5382493284f429d32a63490
+F tool/spaceanal.tcl 15f6cd939b4ecc14d061de7e8ace89e26c30c40b
 F tool/speedtest.tcl 06c76698485ccf597b9e7dbb1ac70706eb873355
 F tool/speedtest16.c c8a9c793df96db7e4933f0852abb7a03d48f2e81
 F tool/speedtest2.tcl ee2149167303ba8e95af97873c575c3e0fab58ff
 F tool/speedtest8.c 2902c46588c40b55661e471d7a86e4dd71a18224
 F tool/speedtest8inst1.c 293327bc76823f473684d589a8160bde1f52c14e
 F tool/split-sqlite3c.tcl d9be87f1c340285a3e081eb19b4a247981ed290c
-F tool/symbols.sh bc2a3709940d47c8ac8e0a1fdf17ec801f015a00
-F tool/tostr.awk 11760e1b94a5d3dcd42378f3cc18544c06cfa576
+F tool/symbols-mingw.sh 4dbcea7e74768305384c9fd2ed2b41bbf9f0414d
+F tool/symbols.sh fec58532668296d7c7dc48be9c87f75ccdb5814f
+F tool/tostr.awk e75472c2f98dd76e06b8c9c1367f4ab07e122d06
 F tool/vdbe-compress.tcl d70ea6d8a19e3571d7ab8c9b75cba86d1173ff0f
-F tool/warnings.sh 347d974d143cf132f953b565fbc03026f19fcb4d
-P de8ad5f8176d5573c02ec39b14cca324cfef5cb9
-R 627b3b91e5169f5233cd18fa7efa5202
-U dan
-Z 94b0ac9079eaca2f6ca6db06cfa18fd2
+F tool/warnings-clang.sh 9f406d66e750e8ac031c63a9ef3248aaa347ef2a
+F tool/warnings.sh fbc018d67fd7395f440c28f33ef0f94420226381
+P 6635cd9a7714b681dd8aa96e90be462a40d10178
+R b059ff356abfc5b4524a9b548916f43e
+T +sym-version-3.7.9 *
+U drh
+Z a9ecbb5c487c786a176874d979505217
diff --git a/manifest.uuid b/manifest.uuid
index 735e9cae..cf01f92c 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-af0d91adf497f5f36ec3813f04235a6e195a605f
+c7c6050ef060877ebe77b41d959e9df13f8c9b5e
diff --git a/mkopcodec.awk b/mkopcodec.awk
index ec809530..2ef77d4c 100644
--- a/mkopcodec.awk
+++ b/mkopcodec.awk
@@ -17,13 +17,18 @@ BEGIN {
   print     " || defined(SQLITE_DEBUG)"
   print "const char *sqlite3OpcodeName(int i){"
   print " static const char *const azName[] = { \"?\","
+  mx = 0
 }
 /define OP_/ {
   sub("OP_","",$2)
-  i++
-  printf "     /* %3d */ \"%s\",\n", $3, $2
+  i = $3+0
+  label[i] = $2
+  if( mx<i ) mx = i
 }
 END {
+  for(i=1; i<=mx; i++){
+    printf "     /* %3d */ \"%s\",\n", i, label[i]
+  }
   print "  };"
   print "  return azName[i];"
   print "}"
diff --git a/src/analyze.c b/src/analyze.c
index 17c1de83..b6a987ab 100644
--- a/src/analyze.c
+++ b/src/analyze.c
@@ -10,6 +10,108 @@
 **
 *************************************************************************
 ** This file contains code associated with the ANALYZE command.
+**
+** The ANALYZE command gather statistics about the content of tables
+** and indices.  These statistics are made available to the query planner
+** to help it make better decisions about how to perform queries.
+**
+** The following system tables are or have been supported:
+**
+**    CREATE TABLE sqlite_stat1(tbl, idx, stat);
+**    CREATE TABLE sqlite_stat2(tbl, idx, sampleno, sample);
+**    CREATE TABLE sqlite_stat3(tbl, idx, nEq, nLt, nDLt, sample);
+**
+** Additional tables might be added in future releases of SQLite.
+** The sqlite_stat2 table is not created or used unless the SQLite version
+** is between 3.6.18 and 3.7.8, inclusive, and unless SQLite is compiled
+** with SQLITE_ENABLE_STAT2.  The sqlite_stat2 table is deprecated.
+** The sqlite_stat2 table is superceded by sqlite_stat3, which is only
+** created and used by SQLite versions 3.7.9 and later and with
+** SQLITE_ENABLE_STAT3 defined.  The fucntionality of sqlite_stat3
+** is a superset of sqlite_stat2.  
+**
+** Format of sqlite_stat1:
+**
+** There is normally one row per index, with the index identified by the
+** name in the idx column.  The tbl column is the name of the table to
+** which the index belongs.  In each such row, the stat column will be
+** a string consisting of a list of integers.  The first integer in this
+** list is the number of rows in the index and in the table.  The second
+** integer is the average number of rows in the index that have the same
+** value in the first column of the index.  The third integer is the average
+** number of rows in the index that have the same value for the first two
+** columns.  The N-th integer (for N>1) is the average number of rows in 
+** the index which have the same value for the first N-1 columns.  For
+** a K-column index, there will be K+1 integers in the stat column.  If
+** the index is unique, then the last integer will be 1.
+**
+** The list of integers in the stat column can optionally be followed
+** by the keyword "unordered".  The "unordered" keyword, if it is present,
+** must be separated from the last integer by a single space.  If the
+** "unordered" keyword is present, then the query planner assumes that
+** the index is unordered and will not use the index for a range query.
+** 
+** If the sqlite_stat1.idx column is NULL, then the sqlite_stat1.stat
+** column contains a single integer which is the (estimated) number of
+** rows in the table identified by sqlite_stat1.tbl.
+**
+** Format of sqlite_stat2:
+**
+** The sqlite_stat2 is only created and is only used if SQLite is compiled
+** with SQLITE_ENABLE_STAT2 and if the SQLite version number is between
+** 3.6.18 and 3.7.8.  The "stat2" table contains additional information
+** about the distribution of keys within an index.  The index is identified by
+** the "idx" column and the "tbl" column is the name of the table to which
+** the index belongs.  There are usually 10 rows in the sqlite_stat2
+** table for each index.
+**
+** The sqlite_stat2 entries for an index that have sampleno between 0 and 9
+** inclusive are samples of the left-most key value in the index taken at
+** evenly spaced points along the index.  Let the number of samples be S
+** (10 in the standard build) and let C be the number of rows in the index.
+** Then the sampled rows are given by:
+**
+**     rownumber = (i*C*2 + C)/(S*2)
+**
+** For i between 0 and S-1.  Conceptually, the index space is divided into
+** S uniform buckets and the samples are the middle row from each bucket.
+**
+** The format for sqlite_stat2 is recorded here for legacy reference.  This
+** version of SQLite does not support sqlite_stat2.  It neither reads nor
+** writes the sqlite_stat2 table.  This version of SQLite only supports
+** sqlite_stat3.
+**
+** Format for sqlite_stat3:
+**
+** The sqlite_stat3 is an enhancement to sqlite_stat2.  A new name is
+** used to avoid compatibility problems.  
+**
+** The format of the sqlite_stat3 table is similar to the format of
+** the sqlite_stat2 table.  There are multiple entries for each index.
+** The idx column names the index and the tbl column is the table of the
+** index.  If the idx and tbl columns are the same, then the sample is
+** of the INTEGER PRIMARY KEY.  The sample column is a value taken from
+** the left-most column of the index.  The nEq column is the approximate
+** number of entires in the index whose left-most column exactly matches
+** the sample.  nLt is the approximate number of entires whose left-most
+** column is less than the sample.  The nDLt column is the approximate
+** number of distinct left-most entries in the index that are less than
+** the sample.
+**
+** Future versions of SQLite might change to store a string containing
+** multiple integers values in the nDLt column of sqlite_stat3.  The first
+** integer will be the number of prior index entires that are distinct in
+** the left-most column.  The second integer will be the number of prior index
+** entries that are distinct in the first two columns.  The third integer
+** will be the number of prior index entries that are distinct in the first
+** three columns.  And so forth.  With that extension, the nDLt field is
+** similar in function to the sqlite_stat1.stat field.
+**
+** There can be an arbitrary number of sqlite_stat3 entries per index.
+** The ANALYZE command will typically generate sqlite_stat3 tables
+** that contain between 10 and 40 samples which are distributed across
+** the key space, though not uniformly, and which include samples with
+** largest possible nEq values.
 */
 #ifndef SQLITE_OMIT_ANALYZE
 #include "sqliteInt.h"
@@ -17,16 +119,16 @@
 /*
 ** This routine generates code that opens the sqlite_stat1 table for
 ** writing with cursor iStatCur. If the library was built with the
-** SQLITE_ENABLE_STAT2 macro defined, then the sqlite_stat2 table is
+** SQLITE_ENABLE_STAT3 macro defined, then the sqlite_stat3 table is
 ** opened for writing using cursor (iStatCur+1)
 **
 ** If the sqlite_stat1 tables does not previously exist, it is created.
-** Similarly, if the sqlite_stat2 table does not exist and the library
-** is compiled with SQLITE_ENABLE_STAT2 defined, it is created. 
+** Similarly, if the sqlite_stat3 table does not exist and the library
+** is compiled with SQLITE_ENABLE_STAT3 defined, it is created. 
 **
 ** Argument zWhere may be a pointer to a buffer containing a table name,
 ** or it may be a NULL pointer. If it is not NULL, then all entries in
-** the sqlite_stat1 and (if applicable) sqlite_stat2 tables associated
+** the sqlite_stat1 and (if applicable) sqlite_stat3 tables associated
 ** with the named table are deleted. If zWhere==0, then code is generated
 ** to delete all stat table entries.
 */
@@ -42,8 +144,8 @@ static void openStatTable(
     const char *zCols;
   } aTable[] = {
     { "sqlite_stat1", "tbl,idx,stat" },
-#ifdef SQLITE_ENABLE_STAT2
-    { "sqlite_stat2", "tbl,idx,sampleno,sample" },
+#ifdef SQLITE_ENABLE_STAT3
+    { "sqlite_stat3", "tbl,idx,neq,nlt,ndlt,sample" },
 #endif
   };
 
@@ -59,6 +161,9 @@ static void openStatTable(
   assert( sqlite3VdbeDb(v)==db );
   pDb = &db->aDb[iDb];
 
+  /* Create new statistic tables if they do not exist, or clear them
+  ** if they do already exist.
+  */
   for(i=0; i<ArraySize(aTable); i++){
     const char *zTab = aTable[i].zName;
     Table *pStat;
@@ -89,7 +194,7 @@ static void openStatTable(
     }
   }
 
-  /* Open the sqlite_stat[12] tables for writing. */
+  /* Open the sqlite_stat[13] tables for writing. */
   for(i=0; i<ArraySize(aTable); i++){
     sqlite3VdbeAddOp3(v, OP_OpenWrite, iStatCur+i, aRoot[i], iDb);
     sqlite3VdbeChangeP4(v, -1, (char *)3, P4_INT32);
@@ -97,6 +202,226 @@ static void openStatTable(
   }
 }
 
+/*
+** Recommended number of samples for sqlite_stat3
+*/
+#ifndef SQLITE_STAT3_SAMPLES
+# define SQLITE_STAT3_SAMPLES 24
+#endif
+
+/*
+** Three SQL functions - stat3_init(), stat3_push(), and stat3_pop() -
+** share an instance of the following structure to hold their state
+** information.
+*/
+typedef struct Stat3Accum Stat3Accum;
+struct Stat3Accum {
+  tRowcnt nRow;             /* Number of rows in the entire table */
+  tRowcnt nPSample;         /* How often to do a periodic sample */
+  int iMin;                 /* Index of entry with minimum nEq and hash */
+  int mxSample;             /* Maximum number of samples to accumulate */
+  int nSample;              /* Current number of samples */
+  u32 iPrn;                 /* Pseudo-random number used for sampling */
+  struct Stat3Sample {
+    i64 iRowid;                /* Rowid in main table of the key */
+    tRowcnt nEq;               /* sqlite_stat3.nEq */
+    tRowcnt nLt;               /* sqlite_stat3.nLt */
+    tRowcnt nDLt;              /* sqlite_stat3.nDLt */
+    u8 isPSample;              /* True if a periodic sample */
+    u32 iHash;                 /* Tiebreaker hash */
+  } *a;                     /* An array of samples */
+};
+
+#ifdef SQLITE_ENABLE_STAT3
+/*
+** Implementation of the stat3_init(C,S) SQL function.  The two parameters
+** are the number of rows in the table or index (C) and the number of samples
+** to accumulate (S).
+**
+** This routine allocates the Stat3Accum object.
+**
+** The return value is the Stat3Accum object (P).
+*/
+static void stat3Init(
+  sqlite3_context *context,
+  int argc,
+  sqlite3_value **argv
+){
+  Stat3Accum *p;
+  tRowcnt nRow;
+  int mxSample;
+  int n;
+
+  UNUSED_PARAMETER(argc);
+  nRow = (tRowcnt)sqlite3_value_int64(argv[0]);
+  mxSample = sqlite3_value_int(argv[1]);
+  n = sizeof(*p) + sizeof(p->a[0])*mxSample;
+  p = sqlite3_malloc( n );
+  if( p==0 ){
+    sqlite3_result_error_nomem(context);
+    return;
+  }
+  memset(p, 0, n);
+  p->a = (struct Stat3Sample*)&p[1];
+  p->nRow = nRow;
+  p->mxSample = mxSample;
+  p->nPSample = p->nRow/(mxSample/3+1) + 1;
+  sqlite3_randomness(sizeof(p->iPrn), &p->iPrn);
+  sqlite3_result_blob(context, p, sizeof(p), sqlite3_free);
+}
+static const FuncDef stat3InitFuncdef = {
+  2,                /* nArg */
+  SQLITE_UTF8,      /* iPrefEnc */
+  0,                /* flags */
+  0,                /* pUserData */
+  0,                /* pNext */
+  stat3Init,        /* xFunc */
+  0,                /* xStep */
+  0,                /* xFinalize */
+  "stat3_init",     /* zName */
+  0,                /* pHash */
+  0                 /* pDestructor */
+};
+
+
+/*
+** Implementation of the stat3_push(nEq,nLt,nDLt,rowid,P) SQL function.  The
+** arguments describe a single key instance.  This routine makes the 
+** decision about whether or not to retain this key for the sqlite_stat3
+** table.
+**
+** The return value is NULL.
+*/
+static void stat3Push(
+  sqlite3_context *context,
+  int argc,
+  sqlite3_value **argv
+){
+  Stat3Accum *p = (Stat3Accum*)sqlite3_value_blob(argv[4]);
+  tRowcnt nEq = sqlite3_value_int64(argv[0]);
+  tRowcnt nLt = sqlite3_value_int64(argv[1]);
+  tRowcnt nDLt = sqlite3_value_int64(argv[2]);
+  i64 rowid = sqlite3_value_int64(argv[3]);
+  u8 isPSample = 0;
+  u8 doInsert = 0;
+  int iMin = p->iMin;
+  struct Stat3Sample *pSample;
+  int i;
+  u32 h;
+
+  UNUSED_PARAMETER(context);
+  UNUSED_PARAMETER(argc);
+  if( nEq==0 ) return;
+  h = p->iPrn = p->iPrn*1103515245 + 12345;
+  if( (nLt/p->nPSample)!=((nEq+nLt)/p->nPSample) ){
+    doInsert = isPSample = 1;
+  }else if( p->nSample<p->mxSample ){
+    doInsert = 1;
+  }else{
+    if( nEq>p->a[iMin].nEq || (nEq==p->a[iMin].nEq && h>p->a[iMin].iHash) ){
+      doInsert = 1;
+    }
+  }
+  if( !doInsert ) return;
+  if( p->nSample==p->mxSample ){
+    assert( p->nSample - iMin - 1 >= 0 );
+    memmove(&p->a[iMin], &p->a[iMin+1], sizeof(p->a[0])*(p->nSample-iMin-1));
+    pSample = &p->a[p->nSample-1];
+  }else{
+    pSample = &p->a[p->nSample++];
+  }
+  pSample->iRowid = rowid;
+  pSample->nEq = nEq;
+  pSample->nLt = nLt;
+  pSample->nDLt = nDLt;
+  pSample->iHash = h;
+  pSample->isPSample = isPSample;
+
+  /* Find the new minimum */
+  if( p->nSample==p->mxSample ){
+    pSample = p->a;
+    i = 0;
+    while( pSample->isPSample ){
+      i++;
+      pSample++;
+      assert( i<p->nSample );
+    }
+    nEq = pSample->nEq;
+    h = pSample->iHash;
+    iMin = i;
+    for(i++, pSample++; i<p->nSample; i++, pSample++){
+      if( pSample->isPSample ) continue;
+      if( pSample->nEq<nEq
+       || (pSample->nEq==nEq && pSample->iHash<h)
+      ){
+        iMin = i;
+        nEq = pSample->nEq;
+        h = pSample->iHash;
+      }
+    }
+    p->iMin = iMin;
+  }
+}
+static const FuncDef stat3PushFuncdef = {
+  5,                /* nArg */
+  SQLITE_UTF8,      /* iPrefEnc */
+  0,                /* flags */
+  0,                /* pUserData */
+  0,                /* pNext */
+  stat3Push,        /* xFunc */
+  0,                /* xStep */
+  0,                /* xFinalize */
+  "stat3_push",     /* zName */
+  0,                /* pHash */
+  0                 /* pDestructor */
+};
+
+/*
+** Implementation of the stat3_get(P,N,...) SQL function.  This routine is
+** used to query the results.  Content is returned for the Nth sqlite_stat3
+** row where N is between 0 and S-1 and S is the number of samples.  The
+** value returned depends on the number of arguments.
+**
+**   argc==2    result:  rowid
+**   argc==3    result:  nEq
+**   argc==4    result:  nLt
+**   argc==5    result:  nDLt
+*/
+static void stat3Get(
+  sqlite3_context *context,
+  int argc,
+  sqlite3_value **argv
+){
+  int n = sqlite3_value_int(argv[1]);
+  Stat3Accum *p = (Stat3Accum*)sqlite3_value_blob(argv[0]);
+
+  assert( p!=0 );
+  if( p->nSample<=n ) return;
+  switch( argc ){
+    case 2:  sqlite3_result_int64(context, p->a[n].iRowid); break;
+    case 3:  sqlite3_result_int64(context, p->a[n].nEq);    break;
+    case 4:  sqlite3_result_int64(context, p->a[n].nLt);    break;
+    default: sqlite3_result_int64(context, p->a[n].nDLt);   break;
+  }
+}
+static const FuncDef stat3GetFuncdef = {
+  -1,               /* nArg */
+  SQLITE_UTF8,      /* iPrefEnc */
+  0,                /* flags */
+  0,                /* pUserData */
+  0,                /* pNext */
+  stat3Get,         /* xFunc */
+  0,                /* xStep */
+  0,                /* xFinalize */
+  "stat3_get",     /* zName */
+  0,                /* pHash */
+  0                 /* pDestructor */
+};
+#endif /* SQLITE_ENABLE_STAT3 */
+
+
+
+
 /*
 ** Generate code to do an analysis of all indices associated with
 ** a single table.
@@ -119,20 +444,27 @@ static void analyzeOneTable(
   int iDb;                     /* Index of database containing pTab */
   int regTabname = iMem++;     /* Register containing table name */
   int regIdxname = iMem++;     /* Register containing index name */
-  int regSampleno = iMem++;    /* Register containing next sample number */
-  int regCol = iMem++;         /* Content of a column analyzed table */
+  int regStat1 = iMem++;       /* The stat column of sqlite_stat1 */
+#ifdef SQLITE_ENABLE_STAT3
+  int regNumEq = regStat1;     /* Number of instances.  Same as regStat1 */
+  int regNumLt = iMem++;       /* Number of keys less than regSample */
+  int regNumDLt = iMem++;      /* Number of distinct keys less than regSample */
+  int regSample = iMem++;      /* The next sample value */
+  int regRowid = regSample;    /* Rowid of a sample */
+  int regAccum = iMem++;       /* Register to hold Stat3Accum object */
+  int regLoop = iMem++;        /* Loop counter */
+  int regCount = iMem++;       /* Number of rows in the table or index */
+  int regTemp1 = iMem++;       /* Intermediate register */
+  int regTemp2 = iMem++;       /* Intermediate register */
+  int once = 1;                /* One-time initialization */
+  int shortJump = 0;           /* Instruction address */
+  int iTabCur = pParse->nTab++; /* Table cursor */
+#endif
+  int regCol = iMem++;         /* Content of a column in analyzed table */
   int regRec = iMem++;         /* Register holding completed record */
   int regTemp = iMem++;        /* Temporary use register */
-  int regRowid = iMem++;       /* Rowid for the inserted record */
+  int regNewRowid = iMem++;    /* Rowid for the inserted record */
 
-#ifdef SQLITE_ENABLE_STAT2
-  int addr = 0;                /* Instruction address */
-  int regTemp2 = iMem++;       /* Temporary use register */
-  int regSamplerecno = iMem++; /* Index of next sample to record */
-  int regRecno = iMem++;       /* Current sample index */
-  int regLast = iMem++;        /* Index of last sample to record */
-  int regFirst = iMem++;       /* Index of first sample to record */
-#endif
 
   v = sqlite3GetVdbe(pParse);
   if( v==0 || NEVER(pTab==0) ){
@@ -165,9 +497,14 @@ static void analyzeOneTable(
   for(pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext){
     int nCol;
     KeyInfo *pKey;
+    int addrIfNot = 0;           /* address of OP_IfNot */
+    int *aChngAddr;              /* Array of jump instruction addresses */
 
     if( pOnlyIdx && pOnlyIdx!=pIdx ) continue;
+    VdbeNoopComment((v, "Begin analysis of %s", pIdx->zName));
     nCol = pIdx->nColumn;
+    aChngAddr = sqlite3DbMallocRaw(db, sizeof(int)*nCol);
+    if( aChngAddr==0 ) continue;
     pKey = sqlite3IndexKeyinfo(pParse, pIdx);
     if( iMem+1+(nCol*2)>pParse->nMem ){
       pParse->nMem = iMem+1+(nCol*2);
@@ -182,31 +519,20 @@ static void analyzeOneTable(
     /* Populate the register containing the index name. */
     sqlite3VdbeAddOp4(v, OP_String8, 0, regIdxname, 0, pIdx->zName, 0);
 
-#ifdef SQLITE_ENABLE_STAT2
-
-    /* If this iteration of the loop is generating code to analyze the
-    ** first index in the pTab->pIndex list, then register regLast has
-    ** not been populated. In this case populate it now.  */
-    if( pTab->pIndex==pIdx ){
-      sqlite3VdbeAddOp2(v, OP_Integer, SQLITE_INDEX_SAMPLES, regSamplerecno);
-      sqlite3VdbeAddOp2(v, OP_Integer, SQLITE_INDEX_SAMPLES*2-1, regTemp);
-      sqlite3VdbeAddOp2(v, OP_Integer, SQLITE_INDEX_SAMPLES*2, regTemp2);
-
-      sqlite3VdbeAddOp2(v, OP_Count, iIdxCur, regLast);
-      sqlite3VdbeAddOp2(v, OP_Null, 0, regFirst);
-      addr = sqlite3VdbeAddOp3(v, OP_Lt, regSamplerecno, 0, regLast);
-      sqlite3VdbeAddOp3(v, OP_Divide, regTemp2, regLast, regFirst);
-      sqlite3VdbeAddOp3(v, OP_Multiply, regLast, regTemp, regLast);
-      sqlite3VdbeAddOp2(v, OP_AddImm, regLast, SQLITE_INDEX_SAMPLES*2-2);
-      sqlite3VdbeAddOp3(v, OP_Divide,  regTemp2, regLast, regLast);
-      sqlite3VdbeJumpHere(v, addr);
+#ifdef SQLITE_ENABLE_STAT3
+    if( once ){
+      once = 0;
+      sqlite3OpenTable(pParse, iTabCur, iDb, pTab, OP_OpenRead);
     }
-
-    /* Zero the regSampleno and regRecno registers. */
-    sqlite3VdbeAddOp2(v, OP_Integer, 0, regSampleno);
-    sqlite3VdbeAddOp2(v, OP_Integer, 0, regRecno);
-    sqlite3VdbeAddOp2(v, OP_Copy, regFirst, regSamplerecno);
-#endif
+    sqlite3VdbeAddOp2(v, OP_Count, iIdxCur, regCount);
+    sqlite3VdbeAddOp2(v, OP_Integer, SQLITE_STAT3_SAMPLES, regTemp1);
+    sqlite3VdbeAddOp2(v, OP_Integer, 0, regNumEq);
+    sqlite3VdbeAddOp2(v, OP_Integer, 0, regNumLt);
+    sqlite3VdbeAddOp2(v, OP_Integer, -1, regNumDLt);
+    sqlite3VdbeAddOp4(v, OP_Function, 1, regCount, regAccum,
+                      (char*)&stat3InitFuncdef, P4_FUNCDEF);
+    sqlite3VdbeChangeP5(v, 2);
+#endif /* SQLITE_ENABLE_STAT3 */
 
     /* The block of memory cells initialized here is used as follows.
     **
@@ -236,75 +562,83 @@ static void analyzeOneTable(
     endOfLoop = sqlite3VdbeMakeLabel(v);
     sqlite3VdbeAddOp2(v, OP_Rewind, iIdxCur, endOfLoop);
     topOfLoop = sqlite3VdbeCurrentAddr(v);
-    sqlite3VdbeAddOp2(v, OP_AddImm, iMem, 1);
+    sqlite3VdbeAddOp2(v, OP_AddImm, iMem, 1);  /* Increment row counter */
 
     for(i=0; i<nCol; i++){
       CollSeq *pColl;
       sqlite3VdbeAddOp3(v, OP_Column, iIdxCur, i, regCol);
       if( i==0 ){
-#ifdef SQLITE_ENABLE_STAT2
-        /* Check if the record that cursor iIdxCur points to contains a
-        ** value that should be stored in the sqlite_stat2 table. If so,
-        ** store it.  */
-        int ne = sqlite3VdbeAddOp3(v, OP_Ne, regRecno, 0, regSamplerecno);
-        assert( regTabname+1==regIdxname 
-             && regTabname+2==regSampleno
-             && regTabname+3==regCol
-        );
-        sqlite3VdbeChangeP5(v, SQLITE_JUMPIFNULL);
-        sqlite3VdbeAddOp4(v, OP_MakeRecord, regTabname, 4, regRec, "aaab", 0);
-        sqlite3VdbeAddOp2(v, OP_NewRowid, iStatCur+1, regRowid);
-        sqlite3VdbeAddOp3(v, OP_Insert, iStatCur+1, regRec, regRowid);
-
-        /* Calculate new values for regSamplerecno and regSampleno.
-        **
-        **   sampleno = sampleno + 1
-        **   samplerecno = samplerecno+(remaining records)/(remaining samples)
-        */
-        sqlite3VdbeAddOp2(v, OP_AddImm, regSampleno, 1);
-        sqlite3VdbeAddOp3(v, OP_Subtract, regRecno, regLast, regTemp);
-        sqlite3VdbeAddOp2(v, OP_AddImm, regTemp, -1);
-        sqlite3VdbeAddOp2(v, OP_Integer, SQLITE_INDEX_SAMPLES, regTemp2);
-        sqlite3VdbeAddOp3(v, OP_Subtract, regSampleno, regTemp2, regTemp2);
-        sqlite3VdbeAddOp3(v, OP_Divide, regTemp2, regTemp, regTemp);
-        sqlite3VdbeAddOp3(v, OP_Add, regSamplerecno, regTemp, regSamplerecno);
-
-        sqlite3VdbeJumpHere(v, ne);
-        sqlite3VdbeAddOp2(v, OP_AddImm, regRecno, 1);
-#endif
-
         /* Always record the very first row */
-        sqlite3VdbeAddOp1(v, OP_IfNot, iMem+1);
+        addrIfNot = sqlite3VdbeAddOp1(v, OP_IfNot, iMem+1);
       }
       assert( pIdx->azColl!=0 );
       assert( pIdx->azColl[i]!=0 );
       pColl = sqlite3LocateCollSeq(pParse, pIdx->azColl[i]);
-      sqlite3VdbeAddOp4(v, OP_Ne, regCol, 0, iMem+nCol+i+1,
-                       (char*)pColl, P4_COLLSEQ);
+      aChngAddr[i] = sqlite3VdbeAddOp4(v, OP_Ne, regCol, 0, iMem+nCol+i+1,
+                                      (char*)pColl, P4_COLLSEQ);
       sqlite3VdbeChangeP5(v, SQLITE_NULLEQ);
-    }
-    if( db->mallocFailed ){
-      /* If a malloc failure has occurred, then the result of the expression 
-      ** passed as the second argument to the call to sqlite3VdbeJumpHere() 
-      ** below may be negative. Which causes an assert() to fail (or an
-      ** out-of-bounds write if SQLITE_DEBUG is not defined).  */
-      return;
+      VdbeComment((v, "jump if column %d changed", i));
+#ifdef SQLITE_ENABLE_STAT3
+      if( i==0 ){
+        sqlite3VdbeAddOp2(v, OP_AddImm, regNumEq, 1);
+        VdbeComment((v, "incr repeat count"));
+      }
+#endif
     }
     sqlite3VdbeAddOp2(v, OP_Goto, 0, endOfLoop);
     for(i=0; i<nCol; i++){
-      int addr2 = sqlite3VdbeCurrentAddr(v) - (nCol*2);
+      sqlite3VdbeJumpHere(v, aChngAddr[i]);  /* Set jump dest for the OP_Ne */
       if( i==0 ){
-        sqlite3VdbeJumpHere(v, addr2-1);  /* Set jump dest for the OP_IfNot */
+        sqlite3VdbeJumpHere(v, addrIfNot);   /* Jump dest for OP_IfNot */
+#ifdef SQLITE_ENABLE_STAT3
+        sqlite3VdbeAddOp4(v, OP_Function, 1, regNumEq, regTemp2,
+                          (char*)&stat3PushFuncdef, P4_FUNCDEF);
+        sqlite3VdbeChangeP5(v, 5);
+        sqlite3VdbeAddOp3(v, OP_Column, iIdxCur, pIdx->nColumn, regRowid);
+        sqlite3VdbeAddOp3(v, OP_Add, regNumEq, regNumLt, regNumLt);
+        sqlite3VdbeAddOp2(v, OP_AddImm, regNumDLt, 1);
+        sqlite3VdbeAddOp2(v, OP_Integer, 1, regNumEq);
+#endif        
       }
-      sqlite3VdbeJumpHere(v, addr2);      /* Set jump dest for the OP_Ne */
       sqlite3VdbeAddOp2(v, OP_AddImm, iMem+i+1, 1);
       sqlite3VdbeAddOp3(v, OP_Column, iIdxCur, i, iMem+nCol+i+1);
     }
+    sqlite3DbFree(db, aChngAddr);
 
-    /* End of the analysis loop. */
+    /* Always jump here after updating the iMem+1...iMem+1+nCol counters */
     sqlite3VdbeResolveLabel(v, endOfLoop);
+
     sqlite3VdbeAddOp2(v, OP_Next, iIdxCur, topOfLoop);
     sqlite3VdbeAddOp1(v, OP_Close, iIdxCur);
+#ifdef SQLITE_ENABLE_STAT3
+    sqlite3VdbeAddOp4(v, OP_Function, 1, regNumEq, regTemp2,
+                      (char*)&stat3PushFuncdef, P4_FUNCDEF);
+    sqlite3VdbeChangeP5(v, 5);
+    sqlite3VdbeAddOp2(v, OP_Integer, -1, regLoop);
+    shortJump = 
+    sqlite3VdbeAddOp2(v, OP_AddImm, regLoop, 1);
+    sqlite3VdbeAddOp4(v, OP_Function, 1, regAccum, regTemp1,
+                      (char*)&stat3GetFuncdef, P4_FUNCDEF);
+    sqlite3VdbeChangeP5(v, 2);
+    sqlite3VdbeAddOp1(v, OP_IsNull, regTemp1);
+    sqlite3VdbeAddOp3(v, OP_NotExists, iTabCur, shortJump, regTemp1);
+    sqlite3VdbeAddOp3(v, OP_Column, iTabCur, pIdx->aiColumn[0], regSample);
+    sqlite3ColumnDefault(v, pTab, pIdx->aiColumn[0], regSample);
+    sqlite3VdbeAddOp4(v, OP_Function, 1, regAccum, regNumEq,
+                      (char*)&stat3GetFuncdef, P4_FUNCDEF);
+    sqlite3VdbeChangeP5(v, 3);
+    sqlite3VdbeAddOp4(v, OP_Function, 1, regAccum, regNumLt,
+                      (char*)&stat3GetFuncdef, P4_FUNCDEF);
+    sqlite3VdbeChangeP5(v, 4);
+    sqlite3VdbeAddOp4(v, OP_Function, 1, regAccum, regNumDLt,
+                      (char*)&stat3GetFuncdef, P4_FUNCDEF);
+    sqlite3VdbeChangeP5(v, 5);
+    sqlite3VdbeAddOp4(v, OP_MakeRecord, regTabname, 6, regRec, "bbbbbb", 0);
+    sqlite3VdbeAddOp2(v, OP_NewRowid, iStatCur+1, regNewRowid);
+    sqlite3VdbeAddOp3(v, OP_Insert, iStatCur+1, regRec, regNewRowid);
+    sqlite3VdbeAddOp2(v, OP_Goto, 0, shortJump);
+    sqlite3VdbeJumpHere(v, shortJump+2);
+#endif        
 
     /* Store the results in sqlite_stat1.
     **
@@ -324,22 +658,22 @@ static void analyzeOneTable(
     ** If K>0 then it is always the case the D>0 so division by zero
     ** is never possible.
     */
-    sqlite3VdbeAddOp2(v, OP_SCopy, iMem, regSampleno);
+    sqlite3VdbeAddOp2(v, OP_SCopy, iMem, regStat1);
     if( jZeroRows<0 ){
       jZeroRows = sqlite3VdbeAddOp1(v, OP_IfNot, iMem);
     }
     for(i=0; i<nCol; i++){
       sqlite3VdbeAddOp4(v, OP_String8, 0, regTemp, 0, " ", 0);
-      sqlite3VdbeAddOp3(v, OP_Concat, regTemp, regSampleno, regSampleno);
+      sqlite3VdbeAddOp3(v, OP_Concat, regTemp, regStat1, regStat1);
       sqlite3VdbeAddOp3(v, OP_Add, iMem, iMem+i+1, regTemp);
       sqlite3VdbeAddOp2(v, OP_AddImm, regTemp, -1);
       sqlite3VdbeAddOp3(v, OP_Divide, iMem+i+1, regTemp, regTemp);
       sqlite3VdbeAddOp1(v, OP_ToInt, regTemp);
-      sqlite3VdbeAddOp3(v, OP_Concat, regTemp, regSampleno, regSampleno);
+      sqlite3VdbeAddOp3(v, OP_Concat, regTemp, regStat1, regStat1);
     }
     sqlite3VdbeAddOp4(v, OP_MakeRecord, regTabname, 3, regRec, "aaa", 0);
-    sqlite3VdbeAddOp2(v, OP_NewRowid, iStatCur, regRowid);
-    sqlite3VdbeAddOp3(v, OP_Insert, iStatCur, regRec, regRowid);
+    sqlite3VdbeAddOp2(v, OP_NewRowid, iStatCur, regNewRowid);
+    sqlite3VdbeAddOp3(v, OP_Insert, iStatCur, regRec, regNewRowid);
     sqlite3VdbeChangeP5(v, OPFLAG_APPEND);
   }
 
@@ -349,22 +683,23 @@ static void analyzeOneTable(
   if( pTab->pIndex==0 ){
     sqlite3VdbeAddOp3(v, OP_OpenRead, iIdxCur, pTab->tnum, iDb);
     VdbeComment((v, "%s", pTab->zName));
-    sqlite3VdbeAddOp2(v, OP_Count, iIdxCur, regSampleno);
+    sqlite3VdbeAddOp2(v, OP_Count, iIdxCur, regStat1);
     sqlite3VdbeAddOp1(v, OP_Close, iIdxCur);
-    jZeroRows = sqlite3VdbeAddOp1(v, OP_IfNot, regSampleno);
+    jZeroRows = sqlite3VdbeAddOp1(v, OP_IfNot, regStat1);
   }else{
     sqlite3VdbeJumpHere(v, jZeroRows);
     jZeroRows = sqlite3VdbeAddOp0(v, OP_Goto);
   }
   sqlite3VdbeAddOp2(v, OP_Null, 0, regIdxname);
   sqlite3VdbeAddOp4(v, OP_MakeRecord, regTabname, 3, regRec, "aaa", 0);
-  sqlite3VdbeAddOp2(v, OP_NewRowid, iStatCur, regRowid);
-  sqlite3VdbeAddOp3(v, OP_Insert, iStatCur, regRec, regRowid);
+  sqlite3VdbeAddOp2(v, OP_NewRowid, iStatCur, regNewRowid);
+  sqlite3VdbeAddOp3(v, OP_Insert, iStatCur, regRec, regNewRowid);
   sqlite3VdbeChangeP5(v, OPFLAG_APPEND);
   if( pParse->nMem<regRec ) pParse->nMem = regRec;
   sqlite3VdbeJumpHere(v, jZeroRows);
 }
 
+
 /*
 ** Generate code that will cause the most recent index analysis to
 ** be loaded into internal hash tables where is can be used.
@@ -388,7 +723,7 @@ static void analyzeDatabase(Parse *pParse, int iDb){
 
   sqlite3BeginWriteOperation(pParse, 0, iDb);
   iStatCur = pParse->nTab;
-  pParse->nTab += 2;
+  pParse->nTab += 3;
   openStatTable(pParse, iDb, iStatCur, 0, 0);
   iMem = pParse->nMem+1;
   assert( sqlite3SchemaMutexHeld(db, iDb, 0) );
@@ -413,7 +748,7 @@ static void analyzeTable(Parse *pParse, Table *pTab, Index *pOnlyIdx){
   iDb = sqlite3SchemaToIndex(pParse->db, pTab->pSchema);
   sqlite3BeginWriteOperation(pParse, 0, iDb);
   iStatCur = pParse->nTab;
-  pParse->nTab += 2;
+  pParse->nTab += 3;
   if( pOnlyIdx ){
     openStatTable(pParse, iDb, iStatCur, pOnlyIdx->zName, "idx");
   }else{
@@ -518,7 +853,7 @@ static int analysisLoader(void *pData, int argc, char **argv, char **NotUsed){
   Index *pIndex;
   Table *pTable;
   int i, c, n;
-  unsigned int v;
+  tRowcnt v;
   const char *z;
 
   assert( argc==3 );
@@ -561,10 +896,10 @@ static int analysisLoader(void *pData, int argc, char **argv, char **NotUsed){
 ** and its contents.
 */
 void sqlite3DeleteIndexSamples(sqlite3 *db, Index *pIdx){
-#ifdef SQLITE_ENABLE_STAT2
+#ifdef SQLITE_ENABLE_STAT3
   if( pIdx->aSample ){
     int j;
-    for(j=0; j<SQLITE_INDEX_SAMPLES; j++){
+    for(j=0; j<pIdx->nSample; j++){
       IndexSample *p = &pIdx->aSample[j];
       if( p->eType==SQLITE_TEXT || p->eType==SQLITE_BLOB ){
         sqlite3DbFree(db, p->u.z);
@@ -572,25 +907,157 @@ void sqlite3DeleteIndexSamples(sqlite3 *db, Index *pIdx){
     }
     sqlite3DbFree(db, pIdx->aSample);
   }
+  if( db && db->pnBytesFreed==0 ){
+    pIdx->nSample = 0;
+    pIdx->aSample = 0;
+  }
 #else
   UNUSED_PARAMETER(db);
   UNUSED_PARAMETER(pIdx);
 #endif
 }
 
+#ifdef SQLITE_ENABLE_STAT3
 /*
-** Load the content of the sqlite_stat1 and sqlite_stat2 tables. The
+** Load content from the sqlite_stat3 table into the Index.aSample[]
+** arrays of all indices.
+*/
+static int loadStat3(sqlite3 *db, const char *zDb){
+  int rc;                       /* Result codes from subroutines */
+  sqlite3_stmt *pStmt = 0;      /* An SQL statement being run */
+  char *zSql;                   /* Text of the SQL statement */
+  Index *pPrevIdx = 0;          /* Previous index in the loop */
+  int idx = 0;                  /* slot in pIdx->aSample[] for next sample */
+  int eType;                    /* Datatype of a sample */
+  IndexSample *pSample;         /* A slot in pIdx->aSample[] */
+
+  if( !sqlite3FindTable(db, "sqlite_stat3", zDb) ){
+    return SQLITE_OK;
+  }
+
+  zSql = sqlite3MPrintf(db, 
+      "SELECT idx,count(*) FROM %Q.sqlite_stat3"
+      " GROUP BY idx", zDb);
+  if( !zSql ){
+    return SQLITE_NOMEM;
+  }
+  rc = sqlite3_prepare(db, zSql, -1, &pStmt, 0);
+  sqlite3DbFree(db, zSql);
+  if( rc ) return rc;
+
+  while( sqlite3_step(pStmt)==SQLITE_ROW ){
+    char *zIndex;   /* Index name */
+    Index *pIdx;    /* Pointer to the index object */
+    int nSample;    /* Number of samples */
+
+    zIndex = (char *)sqlite3_column_text(pStmt, 0);
+    if( zIndex==0 ) continue;
+    nSample = sqlite3_column_int(pStmt, 1);
+    pIdx = sqlite3FindIndex(db, zIndex, zDb);
+    if( pIdx==0 ) continue;
+    assert( pIdx->nSample==0 );
+    pIdx->nSample = nSample;
+    pIdx->aSample = sqlite3MallocZero( nSample*sizeof(IndexSample) );
+    pIdx->avgEq = pIdx->aiRowEst[1];
+    if( pIdx->aSample==0 ){
+      db->mallocFailed = 1;
+      sqlite3_finalize(pStmt);
+      return SQLITE_NOMEM;
+    }
+  }
+  rc = sqlite3_finalize(pStmt);
+  if( rc ) return rc;
+
+  zSql = sqlite3MPrintf(db, 
+      "SELECT idx,neq,nlt,ndlt,sample FROM %Q.sqlite_stat3", zDb);
+  if( !zSql ){
+    return SQLITE_NOMEM;
+  }
+  rc = sqlite3_prepare(db, zSql, -1, &pStmt, 0);
+  sqlite3DbFree(db, zSql);
+  if( rc ) return rc;
+
+  while( sqlite3_step(pStmt)==SQLITE_ROW ){
+    char *zIndex;   /* Index name */
+    Index *pIdx;    /* Pointer to the index object */
+    int i;          /* Loop counter */
+    tRowcnt sumEq;  /* Sum of the nEq values */
+
+    zIndex = (char *)sqlite3_column_text(pStmt, 0);
+    if( zIndex==0 ) continue;
+    pIdx = sqlite3FindIndex(db, zIndex, zDb);
+    if( pIdx==0 ) continue;
+    if( pIdx==pPrevIdx ){
+      idx++;
+    }else{
+      pPrevIdx = pIdx;
+      idx = 0;
+    }
+    assert( idx<pIdx->nSample );
+    pSample = &pIdx->aSample[idx];
+    pSample->nEq = (tRowcnt)sqlite3_column_int64(pStmt, 1);
+    pSample->nLt = (tRowcnt)sqlite3_column_int64(pStmt, 2);
+    pSample->nDLt = (tRowcnt)sqlite3_column_int64(pStmt, 3);
+    if( idx==pIdx->nSample-1 ){
+      if( pSample->nDLt>0 ){
+        for(i=0, sumEq=0; i<=idx-1; i++) sumEq += pIdx->aSample[i].nEq;
+        pIdx->avgEq = (pSample->nLt - sumEq)/pSample->nDLt;
+      }
+      if( pIdx->avgEq<=0 ) pIdx->avgEq = 1;
+    }
+    eType = sqlite3_column_type(pStmt, 4);
+    pSample->eType = (u8)eType;
+    switch( eType ){
+      case SQLITE_INTEGER: {
+        pSample->u.i = sqlite3_column_int64(pStmt, 4);
+        break;
+      }
+      case SQLITE_FLOAT: {
+        pSample->u.r = sqlite3_column_double(pStmt, 4);
+        break;
+      }
+      case SQLITE_NULL: {
+        break;
+      }
+      default: assert( eType==SQLITE_TEXT || eType==SQLITE_BLOB ); {
+        const char *z = (const char *)(
+              (eType==SQLITE_BLOB) ?
+              sqlite3_column_blob(pStmt, 4):
+              sqlite3_column_text(pStmt, 4)
+           );
+        int n = z ? sqlite3_column_bytes(pStmt, 4) : 0;
+        pSample->nByte = n;
+        if( n < 1){
+          pSample->u.z = 0;
+        }else{
+          pSample->u.z = sqlite3Malloc(n);
+          if( pSample->u.z==0 ){
+            db->mallocFailed = 1;
+            sqlite3_finalize(pStmt);
+            return SQLITE_NOMEM;
+          }
+          memcpy(pSample->u.z, z, n);
+        }
+      }
+    }
+  }
+  return sqlite3_finalize(pStmt);
+}
+#endif /* SQLITE_ENABLE_STAT3 */
+
+/*
+** Load the content of the sqlite_stat1 and sqlite_stat3 tables. The
 ** contents of sqlite_stat1 are used to populate the Index.aiRowEst[]
-** arrays. The contents of sqlite_stat2 are used to populate the
+** arrays. The contents of sqlite_stat3 are used to populate the
 ** Index.aSample[] arrays.
 **
 ** If the sqlite_stat1 table is not present in the database, SQLITE_ERROR
-** is returned. In this case, even if SQLITE_ENABLE_STAT2 was defined 
-** during compilation and the sqlite_stat2 table is present, no data is 
+** is returned. In this case, even if SQLITE_ENABLE_STAT3 was defined 
+** during compilation and the sqlite_stat3 table is present, no data is 
 ** read from it.
 **
-** If SQLITE_ENABLE_STAT2 was defined during compilation and the 
-** sqlite_stat2 table is not present in the database, SQLITE_ERROR is
+** If SQLITE_ENABLE_STAT3 was defined during compilation and the 
+** sqlite_stat3 table is not present in the database, SQLITE_ERROR is
 ** returned. However, in this case, data is read from the sqlite_stat1
 ** table (if it is present) before returning.
 **
@@ -612,8 +1079,10 @@ int sqlite3AnalysisLoad(sqlite3 *db, int iDb){
   for(i=sqliteHashFirst(&db->aDb[iDb].pSchema->idxHash);i;i=sqliteHashNext(i)){
     Index *pIdx = sqliteHashData(i);
     sqlite3DefaultRowEst(pIdx);
+#ifdef SQLITE_ENABLE_STAT3
     sqlite3DeleteIndexSamples(db, pIdx);
     pIdx->aSample = 0;
+#endif
   }
 
   /* Check to make sure the sqlite_stat1 table exists */
@@ -625,7 +1094,7 @@ int sqlite3AnalysisLoad(sqlite3 *db, int iDb){
 
   /* Load new statistics out of the sqlite_stat1 table */
   zSql = sqlite3MPrintf(db, 
-      "SELECT tbl, idx, stat FROM %Q.sqlite_stat1", sInfo.zDatabase);
+      "SELECT tbl,idx,stat FROM %Q.sqlite_stat1", sInfo.zDatabase);
   if( zSql==0 ){
     rc = SQLITE_NOMEM;
   }else{
@@ -634,78 +1103,10 @@ int sqlite3AnalysisLoad(sqlite3 *db, int iDb){
   }
 
 
-  /* Load the statistics from the sqlite_stat2 table. */
-#ifdef SQLITE_ENABLE_STAT2
-  if( rc==SQLITE_OK && !sqlite3FindTable(db, "sqlite_stat2", sInfo.zDatabase) ){
-    rc = SQLITE_ERROR;
-  }
+  /* Load the statistics from the sqlite_stat3 table. */
+#ifdef SQLITE_ENABLE_STAT3
   if( rc==SQLITE_OK ){
-    sqlite3_stmt *pStmt = 0;
-
-    zSql = sqlite3MPrintf(db, 
-        "SELECT idx,sampleno,sample FROM %Q.sqlite_stat2", sInfo.zDatabase);
-    if( !zSql ){
-      rc = SQLITE_NOMEM;
-    }else{
-      rc = sqlite3_prepare(db, zSql, -1, &pStmt, 0);
-      sqlite3DbFree(db, zSql);
-    }
-
-    if( rc==SQLITE_OK ){
-      while( sqlite3_step(pStmt)==SQLITE_ROW ){
-        char *zIndex;   /* Index name */
-        Index *pIdx;    /* Pointer to the index object */
-
-        zIndex = (char *)sqlite3_column_text(pStmt, 0);
-        pIdx = zIndex ? sqlite3FindIndex(db, zIndex, sInfo.zDatabase) : 0;
-        if( pIdx ){
-          int iSample = sqlite3_column_int(pStmt, 1);
-          if( iSample<SQLITE_INDEX_SAMPLES && iSample>=0 ){
-            int eType = sqlite3_column_type(pStmt, 2);
-
-            if( pIdx->aSample==0 ){
-              static const int sz = sizeof(IndexSample)*SQLITE_INDEX_SAMPLES;
-              pIdx->aSample = (IndexSample *)sqlite3DbMallocRaw(0, sz);
-              if( pIdx->aSample==0 ){
-                db->mallocFailed = 1;
-                break;
-              }
-	      memset(pIdx->aSample, 0, sz);
-            }
-
-            assert( pIdx->aSample );
-            {
-              IndexSample *pSample = &pIdx->aSample[iSample];
-              pSample->eType = (u8)eType;
-              if( eType==SQLITE_INTEGER || eType==SQLITE_FLOAT ){
-                pSample->u.r = sqlite3_column_double(pStmt, 2);
-              }else if( eType==SQLITE_TEXT || eType==SQLITE_BLOB ){
-                const char *z = (const char *)(
-                    (eType==SQLITE_BLOB) ?
-                    sqlite3_column_blob(pStmt, 2):
-                    sqlite3_column_text(pStmt, 2)
-                );
-                int n = sqlite3_column_bytes(pStmt, 2);
-                if( n>24 ){
-                  n = 24;
-                }
-                pSample->nByte = (u8)n;
-                if( n < 1){
-                  pSample->u.z = 0;
-                }else{
-                  pSample->u.z = sqlite3DbStrNDup(0, z, n);
-                  if( pSample->u.z==0 ){
-                    db->mallocFailed = 1;
-                    break;
-                  }
-                }
-              }
-            }
-          }
-        }
-      }
-      rc = sqlite3_finalize(pStmt);
-    }
+    rc = loadStat3(db, sInfo.zDatabase);
   }
 #endif
 
diff --git a/src/backup.c b/src/backup.c
index 4d7ae318..bdf96bd8 100644
--- a/src/backup.c
+++ b/src/backup.c
@@ -410,102 +410,106 @@ int sqlite3_backup_step(sqlite3_backup *p, int nPage){
     ** the case where the source and destination databases have the
     ** same schema version.
     */
-    if( rc==SQLITE_DONE 
-     && (rc = sqlite3BtreeUpdateMeta(p->pDest,1,p->iDestSchema+1))==SQLITE_OK
-    ){
-      int nDestTruncate;
-  
-      if( p->pDestDb ){
-        sqlite3ResetInternalSchema(p->pDestDb, -1);
-      }
-
-      /* Set nDestTruncate to the final number of pages in the destination
-      ** database. The complication here is that the destination page
-      ** size may be different to the source page size. 
-      **
-      ** If the source page size is smaller than the destination page size, 
-      ** round up. In this case the call to sqlite3OsTruncate() below will
-      ** fix the size of the file. However it is important to call
-      ** sqlite3PagerTruncateImage() here so that any pages in the 
-      ** destination file that lie beyond the nDestTruncate page mark are
-      ** journalled by PagerCommitPhaseOne() before they are destroyed
-      ** by the file truncation.
-      */
-      assert( pgszSrc==sqlite3BtreeGetPageSize(p->pSrc) );
-      assert( pgszDest==sqlite3BtreeGetPageSize(p->pDest) );
-      if( pgszSrc<pgszDest ){
-        int ratio = pgszDest/pgszSrc;
-        nDestTruncate = (nSrcPage+ratio-1)/ratio;
-        if( nDestTruncate==(int)PENDING_BYTE_PAGE(p->pDest->pBt) ){
-          nDestTruncate--;
+    if( rc==SQLITE_DONE ){
+      rc = sqlite3BtreeUpdateMeta(p->pDest,1,p->iDestSchema+1);
+      if( rc==SQLITE_OK ){
+        if( p->pDestDb ){
+          sqlite3ResetInternalSchema(p->pDestDb, -1);
+        }
+        if( destMode==PAGER_JOURNALMODE_WAL ){
+          rc = sqlite3BtreeSetVersion(p->pDest, 2);
         }
-      }else{
-        nDestTruncate = nSrcPage * (pgszSrc/pgszDest);
       }
-      sqlite3PagerTruncateImage(pDestPager, nDestTruncate);
-
-      if( pgszSrc<pgszDest ){
-        /* If the source page-size is smaller than the destination page-size,
-        ** two extra things may need to happen:
+      if( rc==SQLITE_OK ){
+        int nDestTruncate;
+        /* Set nDestTruncate to the final number of pages in the destination
+        ** database. The complication here is that the destination page
+        ** size may be different to the source page size. 
         **
-        **   * The destination may need to be truncated, and
-        **
-        **   * Data stored on the pages immediately following the 
-        **     pending-byte page in the source database may need to be
-        **     copied into the destination database.
+        ** If the source page size is smaller than the destination page size, 
+        ** round up. In this case the call to sqlite3OsTruncate() below will
+        ** fix the size of the file. However it is important to call
+        ** sqlite3PagerTruncateImage() here so that any pages in the 
+        ** destination file that lie beyond the nDestTruncate page mark are
+        ** journalled by PagerCommitPhaseOne() before they are destroyed
+        ** by the file truncation.
         */
-        const i64 iSize = (i64)pgszSrc * (i64)nSrcPage;
-        sqlite3_file * const pFile = sqlite3PagerFile(pDestPager);
-        i64 iOff;
-        i64 iEnd;
-
-        assert( pFile );
-        assert( (i64)nDestTruncate*(i64)pgszDest >= iSize || (
-              nDestTruncate==(int)(PENDING_BYTE_PAGE(p->pDest->pBt)-1)
-           && iSize>=PENDING_BYTE && iSize<=PENDING_BYTE+pgszDest
-        ));
-
-        /* This call ensures that all data required to recreate the original
-        ** database has been stored in the journal for pDestPager and the
-        ** journal synced to disk. So at this point we may safely modify
-        ** the database file in any way, knowing that if a power failure
-        ** occurs, the original database will be reconstructed from the 
-        ** journal file.  */
-        rc = sqlite3PagerCommitPhaseOne(pDestPager, 0, 1);
-
-        /* Write the extra pages and truncate the database file as required. */
-        iEnd = MIN(PENDING_BYTE + pgszDest, iSize);
-        for(
-          iOff=PENDING_BYTE+pgszSrc; 
-          rc==SQLITE_OK && iOff<iEnd; 
-          iOff+=pgszSrc
-        ){
-          PgHdr *pSrcPg = 0;
-          const Pgno iSrcPg = (Pgno)((iOff/pgszSrc)+1);
-          rc = sqlite3PagerGet(pSrcPager, iSrcPg, &pSrcPg);
-          if( rc==SQLITE_OK ){
-            u8 *zData = sqlite3PagerGetData(pSrcPg);
-            rc = sqlite3OsWrite(pFile, zData, pgszSrc, iOff);
+        assert( pgszSrc==sqlite3BtreeGetPageSize(p->pSrc) );
+        assert( pgszDest==sqlite3BtreeGetPageSize(p->pDest) );
+        if( pgszSrc<pgszDest ){
+          int ratio = pgszDest/pgszSrc;
+          nDestTruncate = (nSrcPage+ratio-1)/ratio;
+          if( nDestTruncate==(int)PENDING_BYTE_PAGE(p->pDest->pBt) ){
+            nDestTruncate--;
           }
-          sqlite3PagerUnref(pSrcPg);
-        }
-        if( rc==SQLITE_OK ){
-          rc = backupTruncateFile(pFile, iSize);
+        }else{
+          nDestTruncate = nSrcPage * (pgszSrc/pgszDest);
         }
+        sqlite3PagerTruncateImage(pDestPager, nDestTruncate);
 
-        /* Sync the database file to disk. */
-        if( rc==SQLITE_OK ){
-          rc = sqlite3PagerSync(pDestPager);
+        if( pgszSrc<pgszDest ){
+          /* If the source page-size is smaller than the destination page-size,
+          ** two extra things may need to happen:
+          **
+          **   * The destination may need to be truncated, and
+          **
+          **   * Data stored on the pages immediately following the 
+          **     pending-byte page in the source database may need to be
+          **     copied into the destination database.
+          */
+          const i64 iSize = (i64)pgszSrc * (i64)nSrcPage;
+          sqlite3_file * const pFile = sqlite3PagerFile(pDestPager);
+          i64 iOff;
+          i64 iEnd;
+
+          assert( pFile );
+          assert( (i64)nDestTruncate*(i64)pgszDest >= iSize || (
+                nDestTruncate==(int)(PENDING_BYTE_PAGE(p->pDest->pBt)-1)
+             && iSize>=PENDING_BYTE && iSize<=PENDING_BYTE+pgszDest
+          ));
+
+          /* This call ensures that all data required to recreate the original
+          ** database has been stored in the journal for pDestPager and the
+          ** journal synced to disk. So at this point we may safely modify
+          ** the database file in any way, knowing that if a power failure
+          ** occurs, the original database will be reconstructed from the 
+          ** journal file.  */
+          rc = sqlite3PagerCommitPhaseOne(pDestPager, 0, 1);
+
+          /* Write the extra pages and truncate the database file as required */
+          iEnd = MIN(PENDING_BYTE + pgszDest, iSize);
+          for(
+            iOff=PENDING_BYTE+pgszSrc; 
+            rc==SQLITE_OK && iOff<iEnd; 
+            iOff+=pgszSrc
+          ){
+            PgHdr *pSrcPg = 0;
+            const Pgno iSrcPg = (Pgno)((iOff/pgszSrc)+1);
+            rc = sqlite3PagerGet(pSrcPager, iSrcPg, &pSrcPg);
+            if( rc==SQLITE_OK ){
+              u8 *zData = sqlite3PagerGetData(pSrcPg);
+              rc = sqlite3OsWrite(pFile, zData, pgszSrc, iOff);
+            }
+            sqlite3PagerUnref(pSrcPg);
+          }
+          if( rc==SQLITE_OK ){
+            rc = backupTruncateFile(pFile, iSize);
+          }
+
+          /* Sync the database file to disk. */
+          if( rc==SQLITE_OK ){
+            rc = sqlite3PagerSync(pDestPager);
+          }
+        }else{
+          rc = sqlite3PagerCommitPhaseOne(pDestPager, 0, 0);
+        }
+    
+        /* Finish committing the transaction to the destination database. */
+        if( SQLITE_OK==rc
+         && SQLITE_OK==(rc = sqlite3BtreeCommitPhaseTwo(p->pDest, 0))
+        ){
+          rc = SQLITE_DONE;
         }
-      }else{
-        rc = sqlite3PagerCommitPhaseOne(pDestPager, 0, 0);
-      }
-  
-      /* Finish committing the transaction to the destination database. */
-      if( SQLITE_OK==rc
-       && SQLITE_OK==(rc = sqlite3BtreeCommitPhaseTwo(p->pDest, 0))
-      ){
-        rc = SQLITE_DONE;
       }
     }
   
@@ -539,14 +543,14 @@ int sqlite3_backup_step(sqlite3_backup *p, int nPage){
 */
 int sqlite3_backup_finish(sqlite3_backup *p){
   sqlite3_backup **pp;                 /* Ptr to head of pagers backup list */
-  sqlite3_mutex *mutex;                /* Mutex to protect source database */
+  MUTEX_LOGIC( sqlite3_mutex *mutex; ) /* Mutex to protect source database */
   int rc;                              /* Value to return */
 
   /* Enter the mutexes */
   if( p==0 ) return SQLITE_OK;
   sqlite3_mutex_enter(p->pSrcDb->mutex);
   sqlite3BtreeEnter(p->pSrc);
-  mutex = p->pSrcDb->mutex;
+  MUTEX_LOGIC( mutex = p->pSrcDb->mutex; )
   if( p->pDestDb ){
     sqlite3_mutex_enter(p->pDestDb->mutex);
   }
@@ -665,10 +669,18 @@ void sqlite3BackupRestart(sqlite3_backup *pBackup){
 */
 int sqlite3BtreeCopyFile(Btree *pTo, Btree *pFrom){
   int rc;
+  sqlite3_file *pFd;              /* File descriptor for database pTo */
   sqlite3_backup b;
   sqlite3BtreeEnter(pTo);
   sqlite3BtreeEnter(pFrom);
 
+  assert( sqlite3BtreeIsInTrans(pTo) );
+  pFd = sqlite3PagerFile(sqlite3BtreePager(pTo));
+  if( pFd->pMethods ){
+    i64 nByte = sqlite3BtreeGetPageSize(pFrom)*(i64)sqlite3BtreeLastPage(pFrom);
+    sqlite3OsFileControl(pFd, SQLITE_FCNTL_OVERWRITE, &nByte);
+  }
+
   /* Set up an sqlite3_backup object. sqlite3_backup.pDestDb must be set
   ** to 0. This is used by the implementations of sqlite3_backup_step()
   ** and sqlite3_backup_finish() to detect that they are being called
@@ -692,8 +704,11 @@ int sqlite3BtreeCopyFile(Btree *pTo, Btree *pFrom){
   rc = sqlite3_backup_finish(&b);
   if( rc==SQLITE_OK ){
     pTo->pBt->pageSizeFixed = 0;
+  }else{
+    sqlite3PagerClearCache(sqlite3BtreePager(b.pDest));
   }
 
+  assert( sqlite3BtreeIsInTrans(pTo)==0 );
   sqlite3BtreeLeave(pFrom);
   sqlite3BtreeLeave(pTo);
   return rc;
diff --git a/src/btree.c b/src/btree.c
index 3d7162db..d64e172f 100644
--- a/src/btree.c
+++ b/src/btree.c
@@ -656,18 +656,21 @@ static int btreeMoveto(
   int rc;                    /* Status code */
   UnpackedRecord *pIdxKey;   /* Unpacked index key */
   char aSpace[150];          /* Temp space for pIdxKey - to avoid a malloc */
+  char *pFree = 0;
 
   if( pKey ){
     assert( nKey==(i64)(int)nKey );
-    pIdxKey = sqlite3VdbeRecordUnpack(pCur->pKeyInfo, (int)nKey, pKey,
-                                      aSpace, sizeof(aSpace));
+    pIdxKey = sqlite3VdbeAllocUnpackedRecord(
+        pCur->pKeyInfo, aSpace, sizeof(aSpace), &pFree
+    );
     if( pIdxKey==0 ) return SQLITE_NOMEM;
+    sqlite3VdbeRecordUnpack(pCur->pKeyInfo, (int)nKey, pKey, pIdxKey);
   }else{
     pIdxKey = 0;
   }
   rc = sqlite3BtreeMovetoUnpacked(pCur, pIdxKey, nKey, bias, pRes);
-  if( pKey ){
-    sqlite3VdbeDeleteUnpackedRecord(pIdxKey);
+  if( pFree ){
+    sqlite3DbFree(pCur->pKeyInfo->db, pFree);
   }
   return rc;
 }
@@ -1763,17 +1766,19 @@ int sqlite3BtreeOpen(
     if( vfsFlags & SQLITE_OPEN_SHAREDCACHE ){
       int nFullPathname = pVfs->mxPathname+1;
       char *zFullPathname = sqlite3Malloc(nFullPathname);
-      sqlite3_mutex *mutexShared;
+      MUTEX_LOGIC( sqlite3_mutex *mutexShared; )
       p->sharable = 1;
       if( !zFullPathname ){
         sqlite3_free(p);
         return SQLITE_NOMEM;
       }
       sqlite3OsFullPathname(pVfs, zFilename, nFullPathname, zFullPathname);
+#if SQLITE_THREADSAFE
       mutexOpen = sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_OPEN);
       sqlite3_mutex_enter(mutexOpen);
       mutexShared = sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_MASTER);
       sqlite3_mutex_enter(mutexShared);
+#endif
       for(pBt=GLOBAL(BtShared*,sqlite3SharedCacheList); pBt; pBt=pBt->pNext){
         assert( pBt->nRef>0 );
         if( 0==strcmp(zFullPathname, sqlite3PagerFilename(pBt->pPager))
@@ -1879,9 +1884,9 @@ int sqlite3BtreeOpen(
     /* Add the new BtShared object to the linked list sharable BtShareds.
     */
     if( p->sharable ){
-      sqlite3_mutex *mutexShared;
+      MUTEX_LOGIC( sqlite3_mutex *mutexShared; )
       pBt->nRef = 1;
-      mutexShared = sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_MASTER);
+      MUTEX_LOGIC( mutexShared = sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_MASTER);)
       if( SQLITE_THREADSAFE && sqlite3GlobalConfig.bCoreMutex ){
         pBt->mutex = sqlite3MutexAlloc(SQLITE_MUTEX_FAST);
         if( pBt->mutex==0 ){
@@ -1963,12 +1968,12 @@ btree_open_out:
 */
 static int removeFromSharingList(BtShared *pBt){
 #ifndef SQLITE_OMIT_SHARED_CACHE
-  sqlite3_mutex *pMaster;
+  MUTEX_LOGIC( sqlite3_mutex *pMaster; )
   BtShared *pList;
   int removed = 0;
 
   assert( sqlite3_mutex_notheld(pBt->mutex) );
-  pMaster = sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_MASTER);
+  MUTEX_LOGIC( pMaster = sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_MASTER); )
   sqlite3_mutex_enter(pMaster);
   pBt->nRef--;
   if( pBt->nRef<=0 ){
@@ -2743,11 +2748,12 @@ static int modifyPagePointer(MemPage *pPage, Pgno iFrom, Pgno iTo, u8 eType){
       if( eType==PTRMAP_OVERFLOW1 ){
         CellInfo info;
         btreeParseCellPtr(pPage, pCell, &info);
-        if( info.iOverflow ){
-          if( iFrom==get4byte(&pCell[info.iOverflow]) ){
-            put4byte(&pCell[info.iOverflow], iTo);
-            break;
-          }
+        if( info.iOverflow
+         && pCell+info.iOverflow+3<=pPage->aData+pPage->maskPage
+         && iFrom==get4byte(&pCell[info.iOverflow])
+        ){
+          put4byte(&pCell[info.iOverflow], iTo);
+          break;
         }
       }else{
         if( get4byte(pCell)==iFrom ){
@@ -3468,7 +3474,8 @@ static int btreeCursor(
     return SQLITE_READONLY;
   }
   if( iTable==1 && btreePagecount(pBt)==0 ){
-    return SQLITE_EMPTY;
+    assert( wrFlag==0 );
+    iTable = 0;
   }
 
   /* Now that no other errors can occur, finish filling in the BtCursor
@@ -3933,21 +3940,55 @@ static int accessPayload(
         /* Need to read this page properly. It contains some of the
         ** range of data that is being read (eOp==0) or written (eOp!=0).
         */
-        DbPage *pDbPage;
+#ifdef SQLITE_DIRECT_OVERFLOW_READ
+        sqlite3_file *fd;
+#endif
         int a = amt;
-        rc = sqlite3PagerGet(pBt->pPager, nextPage, &pDbPage);
-        if( rc==SQLITE_OK ){
-          aPayload = sqlite3PagerGetData(pDbPage);
-          nextPage = get4byte(aPayload);
-          if( a + offset > ovflSize ){
-            a = ovflSize - offset;
-          }
-          rc = copyPayload(&aPayload[offset+4], pBuf, a, eOp, pDbPage);
-          sqlite3PagerUnref(pDbPage);
-          offset = 0;
-          amt -= a;
-          pBuf += a;
+        if( a + offset > ovflSize ){
+          a = ovflSize - offset;
         }
+
+#ifdef SQLITE_DIRECT_OVERFLOW_READ
+        /* If all the following are true:
+        **
+        **   1) this is a read operation, and 
+        **   2) data is required from the start of this overflow page, and
+        **   3) the database is file-backed, and
+        **   4) there is no open write-transaction, and
+        **   5) the database is not a WAL database,
+        **
+        ** then data can be read directly from the database file into the
+        ** output buffer, bypassing the page-cache altogether. This speeds
+        ** up loading large records that span many overflow pages.
+        */
+        if( eOp==0                                             /* (1) */
+         && offset==0                                          /* (2) */
+         && pBt->inTransaction==TRANS_READ                     /* (4) */
+         && (fd = sqlite3PagerFile(pBt->pPager))->pMethods     /* (3) */
+         && pBt->pPage1->aData[19]==0x01                       /* (5) */
+        ){
+          u8 aSave[4];
+          u8 *aWrite = &pBuf[-4];
+          memcpy(aSave, aWrite, 4);
+          rc = sqlite3OsRead(fd, aWrite, a+4, pBt->pageSize * (nextPage-1));
+          nextPage = get4byte(aWrite);
+          memcpy(aWrite, aSave, 4);
+        }else
+#endif
+
+        {
+          DbPage *pDbPage;
+          rc = sqlite3PagerGet(pBt->pPager, nextPage, &pDbPage);
+          if( rc==SQLITE_OK ){
+            aPayload = sqlite3PagerGetData(pDbPage);
+            nextPage = get4byte(aPayload);
+            rc = copyPayload(&aPayload[offset+4], pBuf, a, eOp, pDbPage);
+            sqlite3PagerUnref(pDbPage);
+            offset = 0;
+          }
+        }
+        amt -= a;
+        pBuf += a;
       }
     }
   }
@@ -4222,6 +4263,9 @@ static int moveToRoot(BtCursor *pCur){
       releasePage(pCur->apPage[i]);
     }
     pCur->iPage = 0;
+  }else if( pCur->pgnoRoot==0 ){
+    pCur->eState = CURSOR_INVALID;
+    return SQLITE_OK;
   }else{
     rc = getAndInitPage(pBt, pCur->pgnoRoot, &pCur->apPage[0]);
     if( rc!=SQLITE_OK ){
@@ -4331,7 +4375,7 @@ int sqlite3BtreeFirst(BtCursor *pCur, int *pRes){
   rc = moveToRoot(pCur);
   if( rc==SQLITE_OK ){
     if( pCur->eState==CURSOR_INVALID ){
-      assert( pCur->apPage[pCur->iPage]->nCell==0 );
+      assert( pCur->pgnoRoot==0 || pCur->apPage[pCur->iPage]->nCell==0 );
       *pRes = 1;
     }else{
       assert( pCur->apPage[pCur->iPage]->nCell>0 );
@@ -4370,7 +4414,7 @@ int sqlite3BtreeLast(BtCursor *pCur, int *pRes){
   rc = moveToRoot(pCur);
   if( rc==SQLITE_OK ){
     if( CURSOR_INVALID==pCur->eState ){
-      assert( pCur->apPage[pCur->iPage]->nCell==0 );
+      assert( pCur->pgnoRoot==0 || pCur->apPage[pCur->iPage]->nCell==0 );
       *pRes = 1;
     }else{
       assert( pCur->eState==CURSOR_VALID );
@@ -4443,12 +4487,12 @@ int sqlite3BtreeMovetoUnpacked(
   if( rc ){
     return rc;
   }
-  assert( pCur->apPage[pCur->iPage] );
-  assert( pCur->apPage[pCur->iPage]->isInit );
-  assert( pCur->apPage[pCur->iPage]->nCell>0 || pCur->eState==CURSOR_INVALID );
+  assert( pCur->pgnoRoot==0 || pCur->apPage[pCur->iPage] );
+  assert( pCur->pgnoRoot==0 || pCur->apPage[pCur->iPage]->isInit );
+  assert( pCur->eState==CURSOR_INVALID || pCur->apPage[pCur->iPage]->nCell>0 );
   if( pCur->eState==CURSOR_INVALID ){
     *pRes = -1;
-    assert( pCur->apPage[pCur->iPage]->nCell==0 );
+    assert( pCur->pgnoRoot==0 || pCur->apPage[pCur->iPage]->nCell==0 );
     return SQLITE_OK;
   }
   assert( pCur->apPage[0]->intKey || pIdxKey );
@@ -4543,7 +4587,6 @@ int sqlite3BtreeMovetoUnpacked(
       if( c==0 ){
         if( pPage->intKey && !pPage->leaf ){
           lwr = idx;
-          upr = lwr - 1;
           break;
         }else{
           *pRes = 0;
@@ -4561,7 +4604,7 @@ int sqlite3BtreeMovetoUnpacked(
       }
       pCur->aiIdx[pCur->iPage] = (u16)(idx = (lwr+upr)/2);
     }
-    assert( lwr==upr+1 );
+    assert( lwr==upr+1 || (pPage->intKey && !pPage->leaf) );
     assert( pPage->isInit );
     if( pPage->leaf ){
       chldPg = 0;
@@ -4826,6 +4869,8 @@ static int allocateBtreePage(
         pTrunk = 0;
         goto end_allocate_page;
       }
+      assert( pTrunk!=0 );
+      assert( pTrunk->aData!=0 );
 
       k = get4byte(&pTrunk->aData[4]); /* # of leaves on this trunk page */
       if( k==0 && !searchList ){
@@ -5175,6 +5220,9 @@ static int clearCell(MemPage *pPage, unsigned char *pCell){
   if( info.iOverflow==0 ){
     return SQLITE_OK;  /* No overflow pages. Return without doing anything */
   }
+  if( pCell+info.iOverflow+3 > pPage->aData+pPage->maskPage ){
+    return SQLITE_CORRUPT;  /* Cell extends past end of page */
+  }
   ovflPgno = get4byte(&pCell[info.iOverflow]);
   assert( pBt->usableSize > 4 );
   ovflPageSize = pBt->usableSize - 4;
@@ -5950,13 +5998,15 @@ static int balance_nonroot(
       ** four bytes of the divider cell. So the pointer is safe to use
       ** later on.  
       **
-      ** Unless SQLite is compiled in secure-delete mode. In this case,
+      ** But not if we are in secure-delete mode. In secure-delete mode,
       ** the dropCell() routine will overwrite the entire cell with zeroes.
       ** In this case, temporarily copy the cell into the aOvflSpace[]
       ** buffer. It will be copied out again as soon as the aSpace[] buffer
       ** is allocated.  */
       if( pBt->secureDelete ){
-        int iOff = SQLITE_PTR_TO_INT(apDiv[i]) - SQLITE_PTR_TO_INT(pParent->aData);
+        int iOff;
+
+        iOff = SQLITE_PTR_TO_INT(apDiv[i]) - SQLITE_PTR_TO_INT(pParent->aData);
         if( (iOff+szNew[i])>(int)pBt->usableSize ){
           rc = SQLITE_CORRUPT_BKPT;
           memset(apOld, 0, (i+1)*sizeof(MemPage*));
@@ -6376,6 +6426,7 @@ static int balance_nonroot(
         /* Cell i is the cell immediately following the last cell on old
         ** sibling page j. If the siblings are not leaf pages of an
         ** intkey b-tree, then cell i was a divider cell. */
+        assert( j+1 < ArraySize(apCopy) );
         pOld = apCopy[++j];
         iNextOld = i + !leafData + pOld->nCell + pOld->nOverflow;
         if( pOld->nOverflow ){
@@ -7358,6 +7409,11 @@ int sqlite3BtreeUpdateMeta(Btree *p, int idx, u32 iMeta){
 int sqlite3BtreeCount(BtCursor *pCur, i64 *pnEntry){
   i64 nEntry = 0;                      /* Value to return in *pnEntry */
   int rc;                              /* Return code */
+
+  if( pCur->pgnoRoot==0 ){
+    *pnEntry = 0;
+    return SQLITE_OK;
+  }
   rc = moveToRoot(pCur);
 
   /* Unless an error occurs, the following loop runs one iteration for each
@@ -8142,7 +8198,6 @@ int sqlite3BtreeSetVersion(Btree *pBtree, int iVersion){
   BtShared *pBt = pBtree->pBt;
   int rc;                         /* Return code */
  
-  assert( pBtree->inTrans==TRANS_NONE );
   assert( iVersion==1 || iVersion==2 );
 
   /* If setting the version fields to 1, do not automatically open the
diff --git a/src/build.c b/src/build.c
index 97758cbc..e23aab6b 100644
--- a/src/build.c
+++ b/src/build.c
@@ -1674,7 +1674,7 @@ void sqlite3CreateView(
   const char *z;
   Token sEnd;
   DbFixer sFix;
-  Token *pName;
+  Token *pName = 0;
   int iDb;
   sqlite3 *db = pParse->db;
 
@@ -1980,6 +1980,100 @@ static void destroyTable(Parse *pParse, Table *pTab){
 #endif
 }
 
+/*
+** Remove entries from the sqlite_statN tables (for N in (1,2,3))
+** after a DROP INDEX or DROP TABLE command.
+*/
+static void sqlite3ClearStatTables(
+  Parse *pParse,         /* The parsing context */
+  int iDb,               /* The database number */
+  const char *zType,     /* "idx" or "tbl" */
+  const char *zName      /* Name of index or table */
+){
+  int i;
+  const char *zDbName = pParse->db->aDb[iDb].zName;
+  for(i=1; i<=3; i++){
+    char zTab[24];
+    sqlite3_snprintf(sizeof(zTab),zTab,"sqlite_stat%d",i);
+    if( sqlite3FindTable(pParse->db, zTab, zDbName) ){
+      sqlite3NestedParse(pParse,
+        "DELETE FROM %Q.%s WHERE %s=%Q",
+        zDbName, zTab, zType, zName
+      );
+    }
+  }
+}
+
+/*
+** Generate code to drop a table.
+*/
+void sqlite3CodeDropTable(Parse *pParse, Table *pTab, int iDb, int isView){
+  Vdbe *v;
+  sqlite3 *db = pParse->db;
+  Trigger *pTrigger;
+  Db *pDb = &db->aDb[iDb];
+
+  v = sqlite3GetVdbe(pParse);
+  assert( v!=0 );
+  sqlite3BeginWriteOperation(pParse, 1, iDb);
+
+#ifndef SQLITE_OMIT_VIRTUALTABLE
+  if( IsVirtual(pTab) ){
+    sqlite3VdbeAddOp0(v, OP_VBegin);
+  }
+#endif
+
+  /* Drop all triggers associated with the table being dropped. Code
+  ** is generated to remove entries from sqlite_master and/or
+  ** sqlite_temp_master if required.
+  */
+  pTrigger = sqlite3TriggerList(pParse, pTab);
+  while( pTrigger ){
+    assert( pTrigger->pSchema==pTab->pSchema || 
+        pTrigger->pSchema==db->aDb[1].pSchema );
+    sqlite3DropTriggerPtr(pParse, pTrigger);
+    pTrigger = pTrigger->pNext;
+  }
+
+#ifndef SQLITE_OMIT_AUTOINCREMENT
+  /* Remove any entries of the sqlite_sequence table associated with
+  ** the table being dropped. This is done before the table is dropped
+  ** at the btree level, in case the sqlite_sequence table needs to
+  ** move as a result of the drop (can happen in auto-vacuum mode).
+  */
+  if( pTab->tabFlags & TF_Autoincrement ){
+    sqlite3NestedParse(pParse,
+      "DELETE FROM %Q.sqlite_sequence WHERE name=%Q",
+      pDb->zName, pTab->zName
+    );
+  }
+#endif
+
+  /* Drop all SQLITE_MASTER table and index entries that refer to the
+  ** table. The program name loops through the master table and deletes
+  ** every row that refers to a table of the same name as the one being
+  ** dropped. Triggers are handled seperately because a trigger can be
+  ** created in the temp database that refers to a table in another
+  ** database.
+  */
+  sqlite3NestedParse(pParse, 
+      "DELETE FROM %Q.%s WHERE tbl_name=%Q and type!='trigger'",
+      pDb->zName, SCHEMA_TABLE(iDb), pTab->zName);
+  if( !isView && !IsVirtual(pTab) ){
+    destroyTable(pParse, pTab);
+  }
+
+  /* Remove the table entry from SQLite's internal schema and modify
+  ** the schema cookie.
+  */
+  if( IsVirtual(pTab) ){
+    sqlite3VdbeAddOp4(v, OP_VDestroy, iDb, 0, 0, pTab->zName, 0);
+  }
+  sqlite3VdbeAddOp4(v, OP_DropTable, iDb, 0, 0, pTab->zName, 0);
+  sqlite3ChangeCookie(pParse, iDb);
+  sqliteViewResetAll(db, iDb);
+}
+
 /*
 ** This routine is called to do the work of a DROP TABLE statement.
 ** pName is the name of the table to be dropped.
@@ -2048,7 +2142,8 @@ void sqlite3DropTable(Parse *pParse, SrcList *pName, int isView, int noErr){
     }
   }
 #endif
-  if( sqlite3StrNICmp(pTab->zName, "sqlite_", 7)==0 ){
+  if( sqlite3StrNICmp(pTab->zName, "sqlite_", 7)==0 
+    && sqlite3StrNICmp(pTab->zName, "sqlite_stat", 11)!=0 ){
     sqlite3ErrorMsg(pParse, "table %s may not be dropped", pTab->zName);
     goto exit_drop_table;
   }
@@ -2072,75 +2167,11 @@ void sqlite3DropTable(Parse *pParse, SrcList *pName, int isView, int noErr){
   */
   v = sqlite3GetVdbe(pParse);
   if( v ){
-    Trigger *pTrigger;
-    Db *pDb = &db->aDb[iDb];
     sqlite3BeginWriteOperation(pParse, 1, iDb);
-
-#ifndef SQLITE_OMIT_VIRTUALTABLE
-    if( IsVirtual(pTab) ){
-      sqlite3VdbeAddOp0(v, OP_VBegin);
-    }
-#endif
+    sqlite3ClearStatTables(pParse, iDb, "tbl", pTab->zName);
     sqlite3FkDropTable(pParse, pName, pTab);
-
-    /* Drop all triggers associated with the table being dropped. Code
-    ** is generated to remove entries from sqlite_master and/or
-    ** sqlite_temp_master if required.
-    */
-    pTrigger = sqlite3TriggerList(pParse, pTab);
-    while( pTrigger ){
-      assert( pTrigger->pSchema==pTab->pSchema || 
-          pTrigger->pSchema==db->aDb[1].pSchema );
-      sqlite3DropTriggerPtr(pParse, pTrigger);
-      pTrigger = pTrigger->pNext;
-    }
-
-#ifndef SQLITE_OMIT_AUTOINCREMENT
-    /* Remove any entries of the sqlite_sequence table associated with
-    ** the table being dropped. This is done before the table is dropped
-    ** at the btree level, in case the sqlite_sequence table needs to
-    ** move as a result of the drop (can happen in auto-vacuum mode).
-    */
-    if( pTab->tabFlags & TF_Autoincrement ){
-      sqlite3NestedParse(pParse,
-        "DELETE FROM %s.sqlite_sequence WHERE name=%Q",
-        pDb->zName, pTab->zName
-      );
-    }
-#endif
-
-    /* Drop all SQLITE_MASTER table and index entries that refer to the
-    ** table. The program name loops through the master table and deletes
-    ** every row that refers to a table of the same name as the one being
-    ** dropped. Triggers are handled seperately because a trigger can be
-    ** created in the temp database that refers to a table in another
-    ** database.
-    */
-    sqlite3NestedParse(pParse, 
-        "DELETE FROM %Q.%s WHERE tbl_name=%Q and type!='trigger'",
-        pDb->zName, SCHEMA_TABLE(iDb), pTab->zName);
-
-    /* Drop any statistics from the sqlite_stat1 table, if it exists */
-    if( sqlite3FindTable(db, "sqlite_stat1", db->aDb[iDb].zName) ){
-      sqlite3NestedParse(pParse,
-        "DELETE FROM %Q.sqlite_stat1 WHERE tbl=%Q", pDb->zName, pTab->zName
-      );
-    }
-
-    if( !isView && !IsVirtual(pTab) ){
-      destroyTable(pParse, pTab);
-    }
-
-    /* Remove the table entry from SQLite's internal schema and modify
-    ** the schema cookie.
-    */
-    if( IsVirtual(pTab) ){
-      sqlite3VdbeAddOp4(v, OP_VDestroy, iDb, 0, 0, pTab->zName, 0);
-    }
-    sqlite3VdbeAddOp4(v, OP_DropTable, iDb, 0, 0, pTab->zName, 0);
-    sqlite3ChangeCookie(pParse, iDb);
+    sqlite3CodeDropTable(pParse, pTab, iDb, isView);
   }
-  sqliteViewResetAll(db, iDb);
 
 exit_drop_table:
   sqlite3SrcListDelete(db, pName);
@@ -2308,11 +2339,15 @@ static void sqlite3RefillIndex(Parse *pParse, Index *pIndex, int memRootPage){
   Table *pTab = pIndex->pTable;  /* The table that is indexed */
   int iTab = pParse->nTab++;     /* Btree cursor used for pTab */
   int iIdx = pParse->nTab++;     /* Btree cursor used for pIndex */
+  int iSorter;                   /* Cursor opened by OpenSorter (if in use) */
   int addr1;                     /* Address of top of loop */
+  int addr2;                     /* Address to jump to for next iteration */
   int tnum;                      /* Root page of index */
   Vdbe *v;                       /* Generate code into this virtual machine */
   KeyInfo *pKey;                 /* KeyInfo for index */
+#ifdef SQLITE_OMIT_MERGE_SORT
   int regIdxKey;                 /* Registers containing the index key */
+#endif
   int regRecord;                 /* Register holding assemblied index record */
   sqlite3 *db = pParse->db;      /* The database connection */
   int iDb = sqlite3SchemaToIndex(db, pIndex->pSchema);
@@ -2341,10 +2376,44 @@ static void sqlite3RefillIndex(Parse *pParse, Index *pIndex, int memRootPage){
   if( memRootPage>=0 ){
     sqlite3VdbeChangeP5(v, 1);
   }
+
+#ifndef SQLITE_OMIT_MERGE_SORT
+  /* Open the sorter cursor if we are to use one. */
+  iSorter = pParse->nTab++;
+  sqlite3VdbeAddOp4(v, OP_SorterOpen, iSorter, 0, 0, (char*)pKey, P4_KEYINFO);
+#else
+  iSorter = iTab;
+#endif
+
+  /* Open the table. Loop through all rows of the table, inserting index
+  ** records into the sorter. */
   sqlite3OpenTable(pParse, iTab, iDb, pTab, OP_OpenRead);
   addr1 = sqlite3VdbeAddOp2(v, OP_Rewind, iTab, 0);
   regRecord = sqlite3GetTempReg(pParse);
+
+#ifndef SQLITE_OMIT_MERGE_SORT
+  sqlite3GenerateIndexKey(pParse, pIndex, iTab, regRecord, 1);
+  sqlite3VdbeAddOp2(v, OP_SorterInsert, iSorter, regRecord);
+  sqlite3VdbeAddOp2(v, OP_Next, iTab, addr1+1);
+  sqlite3VdbeJumpHere(v, addr1);
+  addr1 = sqlite3VdbeAddOp2(v, OP_SorterSort, iSorter, 0);
+  if( pIndex->onError!=OE_None ){
+    int j2 = sqlite3VdbeCurrentAddr(v) + 3;
+    sqlite3VdbeAddOp2(v, OP_Goto, 0, j2);
+    addr2 = sqlite3VdbeCurrentAddr(v);
+    sqlite3VdbeAddOp3(v, OP_SorterCompare, iSorter, j2, regRecord);
+    sqlite3HaltConstraint(
+        pParse, OE_Abort, "indexed columns are not unique", P4_STATIC
+    );
+  }else{
+    addr2 = sqlite3VdbeCurrentAddr(v);
+  }
+  sqlite3VdbeAddOp2(v, OP_SorterData, iSorter, regRecord);
+  sqlite3VdbeAddOp3(v, OP_IdxInsert, iIdx, regRecord, 1);
+  sqlite3VdbeChangeP5(v, OPFLAG_USESEEKRESULT);
+#else
   regIdxKey = sqlite3GenerateIndexKey(pParse, pIndex, iTab, regRecord, 1);
+  addr2 = addr1 + 1;
   if( pIndex->onError!=OE_None ){
     const int regRowid = regIdxKey + pIndex->nColumn;
     const int j2 = sqlite3VdbeCurrentAddr(v) + 2;
@@ -2363,13 +2432,16 @@ static void sqlite3RefillIndex(Parse *pParse, Index *pIndex, int memRootPage){
     sqlite3HaltConstraint(
         pParse, OE_Abort, "indexed columns are not unique", P4_STATIC);
   }
-  sqlite3VdbeAddOp2(v, OP_IdxInsert, iIdx, regRecord);
+  sqlite3VdbeAddOp3(v, OP_IdxInsert, iIdx, regRecord, 0);
   sqlite3VdbeChangeP5(v, OPFLAG_USESEEKRESULT);
+#endif
   sqlite3ReleaseTempReg(pParse, regRecord);
-  sqlite3VdbeAddOp2(v, OP_Next, iTab, addr1+1);
+  sqlite3VdbeAddOp2(v, OP_SorterNext, iSorter, addr2);
   sqlite3VdbeJumpHere(v, addr1);
+
   sqlite3VdbeAddOp1(v, OP_Close, iTab);
   sqlite3VdbeAddOp1(v, OP_Close, iIdx);
+  sqlite3VdbeAddOp1(v, OP_Close, iSorter);
 }
 
 /*
@@ -2439,6 +2511,7 @@ Index *sqlite3CreateIndex(
     assert( pName1 && pName2 );
     iDb = sqlite3TwoPartName(pParse, pName1, pName2, &pName);
     if( iDb<0 ) goto exit_create_index;
+    assert( pName && pName->z );
 
 #ifndef SQLITE_OMIT_TEMPDB
     /* If the index name was unqualified, check if the the table
@@ -2466,6 +2539,7 @@ Index *sqlite3CreateIndex(
     assert( db->aDb[iDb].pSchema==pTab->pSchema );
   }else{
     assert( pName==0 );
+    assert( pStart==0 );
     pTab = pParse->pNewTable;
     if( !pTab ) goto exit_create_index;
     iDb = sqlite3SchemaToIndex(db, pTab->pSchema);
@@ -2508,6 +2582,7 @@ Index *sqlite3CreateIndex(
   if( pName ){
     zName = sqlite3NameFromToken(db, pName);
     if( zName==0 ) goto exit_create_index;
+    assert( pName->z!=0 );
     if( SQLITE_OK!=sqlite3CheckObjectName(pParse, zName) ){
       goto exit_create_index;
     }
@@ -2587,8 +2662,8 @@ Index *sqlite3CreateIndex(
   nCol = pList->nExpr;
   pIndex = sqlite3DbMallocZero(db, 
       sizeof(Index) +              /* Index structure  */
+      sizeof(tRowcnt)*(nCol+1) +   /* Index.aiRowEst   */
       sizeof(int)*nCol +           /* Index.aiColumn   */
-      sizeof(int)*(nCol+1) +       /* Index.aiRowEst   */
       sizeof(char *)*nCol +        /* Index.azColl     */
       sizeof(u8)*nCol +            /* Index.aSortOrder */
       nName + 1 +                  /* Index.zName      */
@@ -2597,10 +2672,10 @@ Index *sqlite3CreateIndex(
   if( db->mallocFailed ){
     goto exit_create_index;
   }
-  pIndex->azColl = (char**)(&pIndex[1]);
+  pIndex->aiRowEst = (tRowcnt*)(&pIndex[1]);
+  pIndex->azColl = (char**)(&pIndex->aiRowEst[nCol+1]);
   pIndex->aiColumn = (int *)(&pIndex->azColl[nCol]);
-  pIndex->aiRowEst = (unsigned *)(&pIndex->aiColumn[nCol]);
-  pIndex->aSortOrder = (u8 *)(&pIndex->aiRowEst[nCol+1]);
+  pIndex->aSortOrder = (u8 *)(&pIndex->aiColumn[nCol]);
   pIndex->zName = (char *)(&pIndex->aSortOrder[nCol]);
   zExtra = (char *)(&pIndex->zName[nName+1]);
   memcpy(pIndex->zName, zName, nName+1);
@@ -2791,7 +2866,7 @@ Index *sqlite3CreateIndex(
       /* A named index with an explicit CREATE INDEX statement */
       zStmt = sqlite3MPrintf(db, "CREATE%s INDEX %.*s",
         onError==OE_None ? "" : " UNIQUE",
-        pEnd->z - pName->z + 1,
+        (int)(pEnd->z - pName->z) + 1,
         pName->z);
     }else{
       /* An automatic index created by a PRIMARY KEY or UNIQUE constraint */
@@ -2877,9 +2952,9 @@ exit_create_index:
 ** are based on typical values found in actual indices.
 */
 void sqlite3DefaultRowEst(Index *pIdx){
-  unsigned *a = pIdx->aiRowEst;
+  tRowcnt *a = pIdx->aiRowEst;
   int i;
-  unsigned n;
+  tRowcnt n;
   assert( a!=0 );
   a[0] = pIdx->pTable->nRowEst;
   if( a[0]<10 ) a[0] = 10;
@@ -2949,15 +3024,9 @@ void sqlite3DropIndex(Parse *pParse, SrcList *pName, int ifExists){
     sqlite3BeginWriteOperation(pParse, 1, iDb);
     sqlite3NestedParse(pParse,
        "DELETE FROM %Q.%s WHERE name=%Q AND type='index'",
-       db->aDb[iDb].zName, SCHEMA_TABLE(iDb),
-       pIndex->zName
+       db->aDb[iDb].zName, SCHEMA_TABLE(iDb), pIndex->zName
     );
-    if( sqlite3FindTable(db, "sqlite_stat1", db->aDb[iDb].zName) ){
-      sqlite3NestedParse(pParse,
-        "DELETE FROM %Q.sqlite_stat1 WHERE idx=%Q",
-        db->aDb[iDb].zName, pIndex->zName
-      );
-    }
+    sqlite3ClearStatTables(pParse, iDb, "idx", pIndex->zName);
     sqlite3ChangeCookie(pParse, iDb);
     destroyRootPage(pParse, pIndex->tnum, iDb);
     sqlite3VdbeAddOp4(v, OP_DropIndex, iDb, 0, 0, pIndex->zName, 0);
@@ -3329,8 +3398,9 @@ void sqlite3SrcListIndexedBy(Parse *pParse, SrcList *p, Token *pIndexedBy){
 ** operator with A.  This routine shifts that operator over to B.
 */
 void sqlite3SrcListShiftJoinType(SrcList *p){
-  if( p && p->a ){
+  if( p ){
     int i;
+    assert( p->a || p->nSrc==0 );
     for(i=p->nSrc-1; i>0; i--){
       p->a[i].jointype = p->a[i-1].jointype;
     }
@@ -3368,13 +3438,10 @@ void sqlite3BeginTransaction(Parse *pParse, int type){
 ** Commit a transaction
 */
 void sqlite3CommitTransaction(Parse *pParse){
-  sqlite3 *db;
   Vdbe *v;
 
   assert( pParse!=0 );
-  db = pParse->db;
-  assert( db!=0 );
-/*  if( db->aDb[0].pBt==0 ) return; */
+  assert( pParse->db!=0 );
   if( sqlite3AuthCheck(pParse, SQLITE_TRANSACTION, "COMMIT", 0, 0) ){
     return;
   }
@@ -3388,13 +3455,10 @@ void sqlite3CommitTransaction(Parse *pParse){
 ** Rollback a transaction
 */
 void sqlite3RollbackTransaction(Parse *pParse){
-  sqlite3 *db;
   Vdbe *v;
 
   assert( pParse!=0 );
-  db = pParse->db;
-  assert( db!=0 );
-/*  if( db->aDb[0].pBt==0 ) return; */
+  assert( pParse->db!=0 );
   if( sqlite3AuthCheck(pParse, SQLITE_TRANSACTION, "ROLLBACK", 0, 0) ){
     return;
   }
diff --git a/src/ctime.c b/src/ctime.c
index a128f61a..1688069c 100644
--- a/src/ctime.c
+++ b/src/ctime.c
@@ -114,8 +114,8 @@ static const char * const azCompileOpt[] = {
 #ifdef SQLITE_ENABLE_RTREE
   "ENABLE_RTREE",
 #endif
-#ifdef SQLITE_ENABLE_STAT2
-  "ENABLE_STAT2",
+#ifdef SQLITE_ENABLE_STAT3
+  "ENABLE_STAT3",
 #endif
 #ifdef SQLITE_ENABLE_UNLOCK_NOTIFY
   "ENABLE_UNLOCK_NOTIFY",
@@ -144,6 +144,9 @@ static const char * const azCompileOpt[] = {
 #ifdef SQLITE_LOCK_TRACE
   "LOCK_TRACE",
 #endif
+#ifdef SQLITE_MAX_SCHEMA_RETRY
+  "MAX_SCHEMA_RETRY=" CTIMEOPT_VAL(SQLITE_MAX_SCHEMA_RETRY),
+#endif
 #ifdef SQLITE_MEMDEBUG
   "MEMDEBUG",
 #endif
@@ -257,6 +260,9 @@ static const char * const azCompileOpt[] = {
 #ifdef SQLITE_OMIT_MEMORYDB
   "OMIT_MEMORYDB",
 #endif
+#ifdef SQLITE_OMIT_MERGE_SORT
+  "OMIT_MERGE_SORT",
+#endif
 #ifdef SQLITE_OMIT_OR_OPTIMIZATION
   "OMIT_OR_OPTIMIZATION",
 #endif
diff --git a/src/date.c b/src/date.c
index c0744e8c..758dd7c8 100644
--- a/src/date.c
+++ b/src/date.c
@@ -289,12 +289,18 @@ static int parseYyyyMmDd(const char *zDate, DateTime *p){
 }
 
 /*
-** Set the time to the current time reported by the VFS
+** Set the time to the current time reported by the VFS.
+**
+** Return the number of errors.
 */
-static void setDateTimeToCurrent(sqlite3_context *context, DateTime *p){
+static int setDateTimeToCurrent(sqlite3_context *context, DateTime *p){
   sqlite3 *db = sqlite3_context_db_handle(context);
-  sqlite3OsCurrentTimeInt64(db->pVfs, &p->iJD);
-  p->validJD = 1;
+  if( sqlite3OsCurrentTimeInt64(db->pVfs, &p->iJD)==SQLITE_OK ){
+    p->validJD = 1;
+    return 0;
+  }else{
+    return 1;
+  }
 }
 
 /*
@@ -324,8 +330,7 @@ static int parseDateOrTime(
   }else if( parseHhMmSs(zDate, p)==0 ){
     return 0;
   }else if( sqlite3StrICmp(zDate,"now")==0){
-    setDateTimeToCurrent(context, p);
-    return 0;
+    return setDateTimeToCurrent(context, p);
   }else if( sqlite3AtoF(zDate, &r, sqlite3Strlen30(zDate), SQLITE_UTF8) ){
     p->iJD = (sqlite3_int64)(r*86400000.0 + 0.5);
     p->validJD = 1;
@@ -427,7 +432,9 @@ static int osLocaltime(time_t *t, struct tm *pTm){
 #if (!defined(HAVE_LOCALTIME_R) || !HAVE_LOCALTIME_R) \
       && (!defined(HAVE_LOCALTIME_S) || !HAVE_LOCALTIME_S)
   struct tm *pX;
+#if SQLITE_THREADSAFE>0
   sqlite3_mutex *mutex = sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_MASTER);
+#endif
   sqlite3_mutex_enter(mutex);
   pX = localtime(t);
 #ifndef SQLITE_OMIT_BUILTIN_TEST
@@ -750,8 +757,9 @@ static int isDate(
   int eType;
   memset(p, 0, sizeof(*p));
   if( argc==0 ){
-    setDateTimeToCurrent(context, p);
-  }else if( (eType = sqlite3_value_type(argv[0]))==SQLITE_FLOAT
+    return setDateTimeToCurrent(context, p);
+  }
+  if( (eType = sqlite3_value_type(argv[0]))==SQLITE_FLOAT
                    || eType==SQLITE_INTEGER ){
     p->iJD = (sqlite3_int64)(sqlite3_value_double(argv[0])*86400000.0 + 0.5);
     p->validJD = 1;
@@ -1063,31 +1071,28 @@ static void currentTimeFunc(
   char *zFormat = (char *)sqlite3_user_data(context);
   sqlite3 *db;
   sqlite3_int64 iT;
+  struct tm *pTm;
+  struct tm sNow;
   char zBuf[20];
 
   UNUSED_PARAMETER(argc);
   UNUSED_PARAMETER(argv);
 
   db = sqlite3_context_db_handle(context);
-  sqlite3OsCurrentTimeInt64(db->pVfs, &iT);
+  if( sqlite3OsCurrentTimeInt64(db->pVfs, &iT) ) return;
   t = iT/1000 - 10000*(sqlite3_int64)21086676;
 #ifdef HAVE_GMTIME_R
-  {
-    struct tm sNow;
-    gmtime_r(&t, &sNow);
-    strftime(zBuf, 20, zFormat, &sNow);
-  }
+  pTm = gmtime_r(&t, &sNow);
 #else
-  {
-    struct tm *pTm;
-    sqlite3_mutex_enter(sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_MASTER));
-    pTm = gmtime(&t);
-    strftime(zBuf, 20, zFormat, pTm);
-    sqlite3_mutex_leave(sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_MASTER));
-  }
+  sqlite3_mutex_enter(sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_MASTER));
+  pTm = gmtime(&t);
+  if( pTm ) memcpy(&sNow, pTm, sizeof(sNow));
+  sqlite3_mutex_leave(sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_MASTER));
 #endif
-
-  sqlite3_result_text(context, zBuf, -1, SQLITE_TRANSIENT);
+  if( pTm ){
+    strftime(zBuf, 20, zFormat, &sNow);
+    sqlite3_result_text(context, zBuf, -1, SQLITE_TRANSIENT);
+  }
 }
 #endif
 
diff --git a/src/delete.c b/src/delete.c
index ec0ecec7..147a5ca8 100644
--- a/src/delete.c
+++ b/src/delete.c
@@ -371,7 +371,9 @@ void sqlite3DeleteFrom(
     /* Collect rowids of every row to be deleted.
     */
     sqlite3VdbeAddOp2(v, OP_Null, 0, iRowSet);
-    pWInfo = sqlite3WhereBegin(pParse, pTabList, pWhere,0,WHERE_DUPLICATES_OK);
+    pWInfo = sqlite3WhereBegin(
+        pParse, pTabList, pWhere, 0, 0, WHERE_DUPLICATES_OK
+    );
     if( pWInfo==0 ) goto delete_from_cleanup;
     regRowid = sqlite3ExprCodeGetColumn(pParse, pTab, -1, iCur, iRowid);
     sqlite3VdbeAddOp2(v, OP_RowSetAdd, iRowSet, regRowid);
diff --git a/src/expr.c b/src/expr.c
index be2f4d7c..d5061737 100644
--- a/src/expr.c
+++ b/src/expr.c
@@ -403,7 +403,8 @@ Expr *sqlite3ExprAlloc(
       }else{
         int c;
         pNew->u.zToken = (char*)&pNew[1];
-        memcpy(pNew->u.zToken, pToken->z, pToken->n);
+        assert( pToken->z!=0 || pToken->n==0 );
+        if( pToken->n ) memcpy(pNew->u.zToken, pToken->z, pToken->n);
         pNew->u.zToken[pToken->n] = 0;
         if( dequote && nExtra>=3 
              && ((c = pToken->z[0])=='\'' || c=='"' || c=='[' || c=='`') ){
@@ -901,7 +902,9 @@ SrcList *sqlite3SrcListDup(sqlite3 *db, SrcList *p, int flags){
     pNewItem->zAlias = sqlite3DbStrDup(db, pOldItem->zAlias);
     pNewItem->jointype = pOldItem->jointype;
     pNewItem->iCursor = pOldItem->iCursor;
-    pNewItem->isPopulated = pOldItem->isPopulated;
+    pNewItem->addrFillSub = pOldItem->addrFillSub;
+    pNewItem->regReturn = pOldItem->regReturn;
+    pNewItem->isCorrelated = pOldItem->isCorrelated;
     pNewItem->zIndex = sqlite3DbStrDup(db, pOldItem->zIndex);
     pNewItem->notIndexed = pOldItem->notIndexed;
     pNewItem->pIndex = pOldItem->pIndex;
@@ -1440,11 +1443,19 @@ int sqlite3FindInIndex(Parse *pParse, Expr *pX, int *prNotFound){
   p = (ExprHasProperty(pX, EP_xIsSelect) ? pX->x.pSelect : 0);
   if( ALWAYS(pParse->nErr==0) && isCandidateForInOpt(p) ){
     sqlite3 *db = pParse->db;              /* Database connection */
-    Expr *pExpr = p->pEList->a[0].pExpr;   /* Expression <column> */
-    int iCol = pExpr->iColumn;             /* Index of column <column> */
     Vdbe *v = sqlite3GetVdbe(pParse);      /* Virtual machine being coded */
-    Table *pTab = p->pSrc->a[0].pTab;      /* Table <table>. */
+    Table *pTab;                           /* Table <table>. */
+    Expr *pExpr;                           /* Expression <column> */
+    int iCol;                              /* Index of column <column> */
     int iDb;                               /* Database idx for pTab */
+
+    assert( p );                        /* Because of isCandidateForInOpt(p) */
+    assert( p->pEList!=0 );             /* Because of isCandidateForInOpt(p) */
+    assert( p->pEList->a[0].pExpr!=0 ); /* Because of isCandidateForInOpt(p) */
+    assert( p->pSrc!=0 );               /* Because of isCandidateForInOpt(p) */
+    pTab = p->pSrc->a[0].pTab;
+    pExpr = p->pEList->a[0].pExpr;
+    iCol = pExpr->iColumn;
    
     /* Code an OP_VerifyCookie and OP_TableLock for <table>. */
     iDb = sqlite3SchemaToIndex(db, pTab->pSchema);
@@ -1460,8 +1471,7 @@ int sqlite3FindInIndex(Parse *pParse, Expr *pX, int *prNotFound){
       int iMem = ++pParse->nMem;
       int iAddr;
 
-      iAddr = sqlite3VdbeAddOp1(v, OP_If, iMem);
-      sqlite3VdbeAddOp2(v, OP_Integer, 1, iMem);
+      iAddr = sqlite3VdbeAddOp1(v, OP_Once, iMem);
 
       sqlite3OpenTable(pParse, iTab, iDb, pTab, OP_OpenRead);
       eType = IN_INDEX_ROWID;
@@ -1492,8 +1502,7 @@ int sqlite3FindInIndex(Parse *pParse, Expr *pX, int *prNotFound){
           char *pKey;
   
           pKey = (char *)sqlite3IndexKeyinfo(pParse, pIdx);
-          iAddr = sqlite3VdbeAddOp1(v, OP_If, iMem);
-          sqlite3VdbeAddOp2(v, OP_Integer, 1, iMem);
+          iAddr = sqlite3VdbeAddOp1(v, OP_Once, iMem);
   
           sqlite3VdbeAddOp4(v, OP_OpenRead, iTab, pIdx->tnum, iDb,
                                pKey,P4_KEYINFO_HANDOFF);
@@ -1574,7 +1583,7 @@ int sqlite3CodeSubselect(
   int rMayHaveNull,       /* Register that records whether NULLs exist in RHS */
   int isRowid             /* If true, LHS of IN operator is a rowid */
 ){
-  int testAddr = 0;                       /* One-time test address */
+  int testAddr = -1;                      /* One-time test address */
   int rReg = 0;                           /* Register storing resulting */
   Vdbe *v = sqlite3GetVdbe(pParse);
   if( NEVER(v==0) ) return 0;
@@ -1592,15 +1601,13 @@ int sqlite3CodeSubselect(
   */
   if( !ExprHasAnyProperty(pExpr, EP_VarSelect) && !pParse->pTriggerTab ){
     int mem = ++pParse->nMem;
-    sqlite3VdbeAddOp1(v, OP_If, mem);
-    testAddr = sqlite3VdbeAddOp2(v, OP_Integer, 1, mem);
-    assert( testAddr>0 || pParse->db->mallocFailed );
+    testAddr = sqlite3VdbeAddOp1(v, OP_Once, mem);
   }
 
 #ifndef SQLITE_OMIT_EXPLAIN
   if( pParse->explain==2 ){
     char *zMsg = sqlite3MPrintf(
-        pParse->db, "EXECUTE %s%s SUBQUERY %d", testAddr?"":"CORRELATED ",
+        pParse->db, "EXECUTE %s%s SUBQUERY %d", testAddr>=0?"":"CORRELATED ",
         pExpr->op==TK_IN?"LIST":"SCALAR", pParse->iNextSelectId
     );
     sqlite3VdbeAddOp4(v, OP_Explain, pParse->iSelectId, 0, 0, zMsg, P4_DYNAMIC);
@@ -1692,9 +1699,9 @@ int sqlite3CodeSubselect(
           ** this code only executes once.  Because for a non-constant
           ** expression we need to rerun this code each time.
           */
-          if( testAddr && !sqlite3ExprIsConstant(pE2) ){
-            sqlite3VdbeChangeToNoop(v, testAddr-1, 2);
-            testAddr = 0;
+          if( testAddr>=0 && !sqlite3ExprIsConstant(pE2) ){
+            sqlite3VdbeChangeToNoop(v, testAddr);
+            testAddr = -1;
           }
 
           /* Evaluate the expression and insert it into the temp table */
@@ -1763,8 +1770,8 @@ int sqlite3CodeSubselect(
     }
   }
 
-  if( testAddr ){
-    sqlite3VdbeJumpHere(v, testAddr-1);
+  if( testAddr>=0 ){
+    sqlite3VdbeJumpHere(v, testAddr);
   }
   sqlite3ExprCachePop(pParse, 1);
 
@@ -2286,7 +2293,7 @@ int sqlite3ExprCodeTarget(Parse *pParse, Expr *pExpr, int target){
         inReg = pCol->iMem;
         break;
       }else if( pAggInfo->useSortingIdx ){
-        sqlite3VdbeAddOp3(v, OP_Column, pAggInfo->sortingIdx,
+        sqlite3VdbeAddOp3(v, OP_Column, pAggInfo->sortingIdxPTab,
                               pCol->iSorterColumn, target);
         break;
       }
@@ -3455,7 +3462,7 @@ int sqlite3ExprCompare(Expr *pA, Expr *pB){
     }
   }else if( pA->op!=TK_COLUMN && pA->u.zToken ){
     if( ExprHasProperty(pB, EP_IntValue) || NEVER(pB->u.zToken==0) ) return 2;
-    if( sqlite3StrICmp(pA->u.zToken,pB->u.zToken)!=0 ){
+    if( strcmp(pA->u.zToken,pB->u.zToken)!=0 ){
       return 2;
     }
   }
diff --git a/src/fkey.c b/src/fkey.c
index dda8a50d..82e4cdc4 100644
--- a/src/fkey.c
+++ b/src/fkey.c
@@ -560,7 +560,7 @@ static void fkScanChildren(
   ** clause. If the constraint is not deferred, throw an exception for
   ** each row found. Otherwise, for deferred constraints, increment the
   ** deferred constraint counter by nIncr for each row selected.  */
-  pWInfo = sqlite3WhereBegin(pParse, pSrc, pWhere, 0, 0);
+  pWInfo = sqlite3WhereBegin(pParse, pSrc, pWhere, 0, 0, 0);
   if( nIncr>0 && pFKey->isDeferred==0 ){
     sqlite3ParseToplevel(pParse)->mayAbort = 1;
   }
@@ -734,7 +734,24 @@ void sqlite3FkCheck(
       pTo = sqlite3LocateTable(pParse, 0, pFKey->zTo, zDb);
     }
     if( !pTo || locateFkeyIndex(pParse, pTo, pFKey, &pIdx, &aiFree) ){
+      assert( isIgnoreErrors==0 || (regOld!=0 && regNew==0) );
       if( !isIgnoreErrors || db->mallocFailed ) return;
+      if( pTo==0 ){
+        /* If isIgnoreErrors is true, then a table is being dropped. In this
+        ** case SQLite runs a "DELETE FROM xxx" on the table being dropped
+        ** before actually dropping it in order to check FK constraints.
+        ** If the parent table of an FK constraint on the current table is
+        ** missing, behave as if it is empty. i.e. decrement the relevant
+        ** FK counter for each row of the current table with non-NULL keys.
+        */
+        Vdbe *v = sqlite3GetVdbe(pParse);
+        int iJump = sqlite3VdbeCurrentAddr(v) + pFKey->nCol + 1;
+        for(i=0; i<pFKey->nCol; i++){
+          int iReg = pFKey->aCol[i].iFrom + regOld + 1;
+          sqlite3VdbeAddOp2(v, OP_IsNull, iReg, iJump);
+        }
+        sqlite3VdbeAddOp2(v, OP_FkCounter, pFKey->isDeferred, -1);
+      }
       continue;
     }
     assert( pFKey->nCol==1 || (aiFree && pIdx) );
@@ -1107,6 +1124,7 @@ static Trigger *fkActionTrigger(
       fkTriggerDelete(db, pTrigger);
       return 0;
     }
+    assert( pStep!=0 );
 
     switch( action ){
       case OE_Restrict:
diff --git a/src/func.c b/src/func.c
index 75046704..0514b384 100644
--- a/src/func.c
+++ b/src/func.c
@@ -332,16 +332,15 @@ static void upperFunc(sqlite3_context *context, int argc, sqlite3_value **argv){
   if( z2 ){
     z1 = contextMalloc(context, ((i64)n)+1);
     if( z1 ){
-      memcpy(z1, z2, n+1);
-      for(i=0; z1[i]; i++){
-        z1[i] = (char)sqlite3Toupper(z1[i]);
+      for(i=0; i<n; i++){
+        z1[i] = (char)sqlite3Toupper(z2[i]);
       }
-      sqlite3_result_text(context, z1, -1, sqlite3_free);
+      sqlite3_result_text(context, z1, n, sqlite3_free);
     }
   }
 }
 static void lowerFunc(sqlite3_context *context, int argc, sqlite3_value **argv){
-  u8 *z1;
+  char *z1;
   const char *z2;
   int i, n;
   UNUSED_PARAMETER(argc);
@@ -352,11 +351,10 @@ static void lowerFunc(sqlite3_context *context, int argc, sqlite3_value **argv){
   if( z2 ){
     z1 = contextMalloc(context, ((i64)n)+1);
     if( z1 ){
-      memcpy(z1, z2, n+1);
-      for(i=0; z1[i]; i++){
-        z1[i] = sqlite3Tolower(z1[i]);
+      for(i=0; i<n; i++){
+        z1[i] = sqlite3Tolower(z2[i]);
       }
-      sqlite3_result_text(context, (char *)z1, -1, sqlite3_free);
+      sqlite3_result_text(context, z1, n, sqlite3_free);
     }
   }
 }
diff --git a/src/global.c b/src/global.c
index 69daa5e9..1e691c44 100644
--- a/src/global.c
+++ b/src/global.c
@@ -143,7 +143,7 @@ SQLITE_WSD struct Sqlite3Config sqlite3Config = {
    SQLITE_THREADSAFE==1,      /* bFullMutex */
    SQLITE_USE_URI,            /* bOpenUri */
    0x7ffffffe,                /* mxStrlen */
-   100,                       /* szLookaside */
+   128,                       /* szLookaside */
    500,                       /* nLookaside */
    {0,0,0,0,0,0,0,0},         /* m */
    {0,0,0,0,0,0,0,0,0},       /* mutex */
diff --git a/src/insert.c b/src/insert.c
index 452939db..277a852c 100644
--- a/src/insert.c
+++ b/src/insert.c
@@ -1747,6 +1747,9 @@ static int xferOptimization(
     return 0;
   }
 #endif
+  if( (pParse->db->flags & SQLITE_CountRows)!=0 ){
+    return 0;
+  }
 
   /* If we get this far, it means either:
   **
diff --git a/src/lempar.c b/src/lempar.c
index fb52490e..cb6025e8 100644
--- a/src/lempar.c
+++ b/src/lempar.c
@@ -716,7 +716,9 @@ void Parse(
 ){
   YYMINORTYPE yyminorunion;
   int yyact;            /* The parser action. */
+#if !defined(YYERRORSYMBOL) && !defined(YYNOERRORRECOVERY)
   int yyendofinput;     /* True if we are at the end of input */
+#endif
 #ifdef YYERRORSYMBOL
   int yyerrorhit = 0;   /* True if yymajor has invoked an error */
 #endif
@@ -739,7 +741,9 @@ void Parse(
     yypParser->yystack[0].major = 0;
   }
   yyminorunion.yy0 = yyminor;
+#if !defined(YYERRORSYMBOL) && !defined(YYNOERRORRECOVERY)
   yyendofinput = (yymajor==0);
+#endif
   ParseARG_STORE;
 
 #ifndef NDEBUG
@@ -751,7 +755,6 @@ void Parse(
   do{
     yyact = yy_find_shift_action(yypParser,(YYCODETYPE)yymajor);
     if( yyact<YYNSTATE ){
-      assert( !yyendofinput );  /* Impossible to shift the $ token */
       yy_shift(yypParser,yyact,yymajor,&yyminorunion);
       yypParser->yyerrcnt--;
       yymajor = YYNOCODE;
diff --git a/src/loadext.c b/src/loadext.c
index c832e684..e9c97adf 100644
--- a/src/loadext.c
+++ b/src/loadext.c
@@ -84,6 +84,8 @@
 # define sqlite3_create_module 0
 # define sqlite3_create_module_v2 0
 # define sqlite3_declare_vtab 0
+# define sqlite3_vtab_config 0
+# define sqlite3_vtab_on_conflict 0
 #endif
 
 #ifdef SQLITE_OMIT_SHARED_CACHE
@@ -107,6 +109,7 @@
 #define sqlite3_blob_open      0
 #define sqlite3_blob_read      0
 #define sqlite3_blob_write     0
+#define sqlite3_blob_reopen    0
 #endif
 
 /*
@@ -372,6 +375,9 @@ static const sqlite3_api_routines sqlite3Apis = {
   0,
   0,
 #endif
+  sqlite3_blob_reopen,
+  sqlite3_vtab_config,
+  sqlite3_vtab_on_conflict,
 };
 
 /*
@@ -397,7 +403,7 @@ static int sqlite3LoadExtension(
   int (*xInit)(sqlite3*,char**,const sqlite3_api_routines*);
   char *zErrmsg = 0;
   void **aHandle;
-  const int nMsg = 300;
+  int nMsg = 300 + sqlite3Strlen30(zFile);
 
   if( pzErrMsg ) *pzErrMsg = 0;
 
@@ -434,6 +440,7 @@ static int sqlite3LoadExtension(
                    sqlite3OsDlSym(pVfs, handle, zProc);
   if( xInit==0 ){
     if( pzErrMsg ){
+      nMsg += sqlite3Strlen30(zProc);
       *pzErrMsg = zErrmsg = sqlite3_malloc(nMsg);
       if( zErrmsg ){
         sqlite3_snprintf(nMsg, zErrmsg,
diff --git a/src/main.c b/src/main.c
index b2366304..42bbba5d 100644
--- a/src/main.c
+++ b/src/main.c
@@ -106,7 +106,7 @@ char *sqlite3_temp_directory = 0;
 **       without blocking.
 */
 int sqlite3_initialize(void){
-  sqlite3_mutex *pMaster;                      /* The main static mutex */
+  MUTEX_LOGIC( sqlite3_mutex *pMaster; )       /* The main static mutex */
   int rc;                                      /* Result code */
 
 #ifdef SQLITE_OMIT_WSD
@@ -140,7 +140,7 @@ int sqlite3_initialize(void){
   ** malloc subsystem - this implies that the allocation of a static
   ** mutex must not require support from the malloc subsystem.
   */
-  pMaster = sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_MASTER);
+  MUTEX_LOGIC( pMaster = sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_MASTER); )
   sqlite3_mutex_enter(pMaster);
   sqlite3GlobalConfig.isMutexInit = 1;
   if( !sqlite3GlobalConfig.isMallocInit ){
@@ -234,6 +234,16 @@ int sqlite3_initialize(void){
 #endif
 #endif
 
+  /* Do extra initialization steps requested by the SQLITE_EXTRA_INIT
+  ** compile-time option.
+  */
+#ifdef SQLITE_EXTRA_INIT
+  if( rc==SQLITE_OK && sqlite3GlobalConfig.isInit ){
+    int SQLITE_EXTRA_INIT(void);
+    rc = SQLITE_EXTRA_INIT();
+  }
+#endif
+
   return rc;
 }
 
@@ -1204,13 +1214,13 @@ int sqlite3_overload_function(
   int nArg
 ){
   int nName = sqlite3Strlen30(zName);
-  int rc;
+  int rc = SQLITE_OK;
   sqlite3_mutex_enter(db->mutex);
   if( sqlite3FindFunction(db, zName, nName, nArg, SQLITE_UTF8, 0)==0 ){
-    sqlite3CreateFunc(db, zName, nArg, SQLITE_UTF8,
-                      0, sqlite3InvalidFunction, 0, 0, 0);
+    rc = sqlite3CreateFunc(db, zName, nArg, SQLITE_UTF8,
+                           0, sqlite3InvalidFunction, 0, 0, 0);
   }
-  rc = sqlite3ApiExit(db, SQLITE_OK);
+  rc = sqlite3ApiExit(db, rc);
   sqlite3_mutex_leave(db->mutex);
   return rc;
 }
@@ -2272,6 +2282,7 @@ opendb_out:
     sqlite3_mutex_leave(db->mutex);
   }
   rc = sqlite3_errcode(db);
+  assert( db!=0 || rc==SQLITE_NOMEM );
   if( rc==SQLITE_NOMEM ){
     sqlite3_close(db);
     db = 0;
diff --git a/src/mem3.c b/src/mem3.c
index e2d66815..1a1b791f 100644
--- a/src/mem3.c
+++ b/src/mem3.c
@@ -433,7 +433,7 @@ static void *memsys3MallocUnsafe(int nByte){
 ** This function assumes that the necessary mutexes, if any, are
 ** already held by the caller. Hence "Unsafe".
 */
-void memsys3FreeUnsafe(void *pOld){
+static void memsys3FreeUnsafe(void *pOld){
   Mem3Block *p = (Mem3Block*)pOld;
   int i;
   u32 size, x;
@@ -508,7 +508,7 @@ static void *memsys3Malloc(int nBytes){
 /*
 ** Free memory.
 */
-void memsys3Free(void *pPrior){
+static void memsys3Free(void *pPrior){
   assert( pPrior );
   memsys3Enter();
   memsys3FreeUnsafe(pPrior);
@@ -518,7 +518,7 @@ void memsys3Free(void *pPrior){
 /*
 ** Change the size of an existing memory allocation
 */
-void *memsys3Realloc(void *pPrior, int nBytes){
+static void *memsys3Realloc(void *pPrior, int nBytes){
   int nOld;
   void *p;
   if( pPrior==0 ){
diff --git a/src/mutex.h b/src/mutex.h
index c24f3da4..b0e552c7 100644
--- a/src/mutex.h
+++ b/src/mutex.h
@@ -60,12 +60,15 @@
 */
 #define sqlite3_mutex_alloc(X)    ((sqlite3_mutex*)8)
 #define sqlite3_mutex_free(X)
-#define sqlite3_mutex_enter(X)
+#define sqlite3_mutex_enter(X)    
 #define sqlite3_mutex_try(X)      SQLITE_OK
-#define sqlite3_mutex_leave(X)
+#define sqlite3_mutex_leave(X)    
 #define sqlite3_mutex_held(X)     ((void)(X),1)
 #define sqlite3_mutex_notheld(X)  ((void)(X),1)
 #define sqlite3MutexAlloc(X)      ((sqlite3_mutex*)8)
 #define sqlite3MutexInit()        SQLITE_OK
 #define sqlite3MutexEnd()
+#define MUTEX_LOGIC(X)
+#else
+#define MUTEX_LOGIC(X)            X
 #endif /* defined(SQLITE_MUTEX_OMIT) */
diff --git a/src/os.c b/src/os.c
index ba0438ad..0b13c86e 100644
--- a/src/os.c
+++ b/src/os.c
@@ -136,7 +136,7 @@ int sqlite3OsOpen(
   ** down into the VFS layer.  Some SQLITE_OPEN_ flags (for example,
   ** SQLITE_OPEN_FULLMUTEX or SQLITE_OPEN_SHAREDCACHE) are blocked before
   ** reaching the VFS. */
-  rc = pVfs->xOpen(pVfs, zPath, pFile, flags & 0x87f3f, pFlagsOut);
+  rc = pVfs->xOpen(pVfs, zPath, pFile, flags & 0x87f7f, pFlagsOut);
   assert( rc==SQLITE_OK || pFile->pMethods==0 );
   return rc;
 }
@@ -208,7 +208,7 @@ int sqlite3OsOpenMalloc(
 ){
   int rc = SQLITE_NOMEM;
   sqlite3_file *pFile;
-  pFile = (sqlite3_file *)sqlite3Malloc(pVfs->szOsFile);
+  pFile = (sqlite3_file *)sqlite3MallocZero(pVfs->szOsFile);
   if( pFile ){
     rc = sqlite3OsOpen(pVfs, zFile, pFile, flags, pOutFlags);
     if( rc!=SQLITE_OK ){
@@ -297,12 +297,12 @@ static void vfsUnlink(sqlite3_vfs *pVfs){
 ** true.
 */
 int sqlite3_vfs_register(sqlite3_vfs *pVfs, int makeDflt){
-  sqlite3_mutex *mutex = 0;
+  MUTEX_LOGIC(sqlite3_mutex *mutex;)
 #ifndef SQLITE_OMIT_AUTOINIT
   int rc = sqlite3_initialize();
   if( rc ) return rc;
 #endif
-  mutex = sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_MASTER);
+  MUTEX_LOGIC( mutex = sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_MASTER); )
   sqlite3_mutex_enter(mutex);
   vfsUnlink(pVfs);
   if( makeDflt || vfsList==0 ){
diff --git a/src/os_common.h b/src/os_common.h
index eba856be..f6c3e7ff 100644
--- a/src/os_common.h
+++ b/src/os_common.h
@@ -29,11 +29,14 @@
 # error "The MEMORY_DEBUG macro is obsolete.  Use SQLITE_DEBUG instead."
 #endif
 
-#ifdef SQLITE_DEBUG
-int sqlite3OSTrace = 0;
-#define OSTRACE(X)          if( sqlite3OSTrace ) sqlite3DebugPrintf X
+#if defined(SQLITE_TEST) && defined(SQLITE_DEBUG)
+# ifndef SQLITE_DEBUG_OS_TRACE
+#   define SQLITE_DEBUG_OS_TRACE 0
+# endif
+  int sqlite3OSTrace = SQLITE_DEBUG_OS_TRACE;
+# define OSTRACE(X)          if( sqlite3OSTrace ) sqlite3DebugPrintf X
 #else
-#define OSTRACE(X)
+# define OSTRACE(X)
 #endif
 
 /*
diff --git a/src/os_unix.c b/src/os_unix.c
index 682e74c9..0ea6daf2 100644
--- a/src/os_unix.c
+++ b/src/os_unix.c
@@ -208,7 +208,6 @@ struct unixFile {
   sqlite3_io_methods const *pMethod;  /* Always the first entry */
   unixInodeInfo *pInode;              /* Info about locks on this inode */
   int h;                              /* The file descriptor */
-  int dirfd;                          /* File descriptor for the directory */
   unsigned char eFileLock;            /* The type of lock held on this fd */
   unsigned char ctrlFlags;            /* Behavioral bits.  UNIXFILE_* flags */
   int lastErrno;                      /* The unix errno from last I/O error */
@@ -250,8 +249,14 @@ struct unixFile {
 /*
 ** Allowed values for the unixFile.ctrlFlags bitmask:
 */
-#define UNIXFILE_EXCL   0x01     /* Connections from one process only */
-#define UNIXFILE_RDONLY 0x02     /* Connection is read only */
+#define UNIXFILE_EXCL        0x01     /* Connections from one process only */
+#define UNIXFILE_RDONLY      0x02     /* Connection is read only */
+#define UNIXFILE_PERSIST_WAL 0x04     /* Persistent WAL mode */
+#ifndef SQLITE_DISABLE_DIRSYNC
+# define UNIXFILE_DIRSYNC    0x08     /* Directory sync needed */
+#else
+# define UNIXFILE_DIRSYNC    0x00
+#endif
 
 /*
 ** Include code that is common to all os_*.c files
@@ -297,6 +302,9 @@ static int posixOpen(const char *zFile, int flags, int mode){
   return open(zFile, flags, mode);
 }
 
+/* Forward reference */
+static int openDirectory(const char*, int*);
+
 /*
 ** Many system calls are accessed through pointer-to-functions so that
 ** they may be overridden at runtime to facilitate fault injection during
@@ -393,6 +401,12 @@ static struct unix_syscall {
 #endif
 #define osFallocate ((int(*)(int,off_t,off_t))aSyscall[15].pCurrent)
 
+  { "unlink",       (sqlite3_syscall_ptr)unlink,           0 },
+#define osUnlink    ((int(*)(const char*))aSyscall[16].pCurrent)
+
+  { "openDirectory",    (sqlite3_syscall_ptr)openDirectory,      0 },
+#define osOpenDirectory ((int(*)(const char*,int*))aSyscall[17].pCurrent)
+
 }; /* End of the overrideable system calls */
 
 /*
@@ -514,7 +528,7 @@ static int unixMutexHeld(void) {
 #endif
 
 
-#ifdef SQLITE_DEBUG
+#if defined(SQLITE_TEST) && defined(SQLITE_DEBUG)
 /*
 ** Helper function for printing out trace information from debugging
 ** binaries. This returns the string represetation of the supplied
@@ -677,7 +691,9 @@ static int sqliteErrorFromPosixError(int posixError, int sqliteIOErr) {
   case ENODEV:
   case ENXIO:
   case ENOENT:
+#ifdef ESTALE                     /* ESTALE is not defined on Interix systems */
   case ESTALE:
+#endif
   case ENOSYS:
     /* these should force the client to close the file and reconnect */
     
@@ -1347,14 +1363,14 @@ static int unixLock(sqlite3_file *id, int eFileLock){
   */
   int rc = SQLITE_OK;
   unixFile *pFile = (unixFile*)id;
-  unixInodeInfo *pInode = pFile->pInode;
+  unixInodeInfo *pInode;
   struct flock lock;
   int tErrno = 0;
 
   assert( pFile );
   OSTRACE(("LOCK    %d %s was %s(%s,%d) pid=%d (unix)\n", pFile->h,
       azFileLock(eFileLock), azFileLock(pFile->eFileLock),
-      azFileLock(pInode->eFileLock), pInode->nShared , getpid()));
+      azFileLock(pFile->pInode->eFileLock), pFile->pInode->nShared , getpid()));
 
   /* If there is already a lock of this type or more restrictive on the
   ** unixFile, do nothing. Don't use the end_lock: exit path, as
@@ -1558,7 +1574,6 @@ static int posixUnlock(sqlite3_file *id, int eFileLock, int handleNFSUnlock){
   unixInodeInfo *pInode;
   struct flock lock;
   int rc = SQLITE_OK;
-  int h;
 
   assert( pFile );
   OSTRACE(("UNLOCK  %d %d was %d(%d,%d) pid=%d (unix)\n", pFile->h, eFileLock,
@@ -1570,14 +1585,10 @@ static int posixUnlock(sqlite3_file *id, int eFileLock, int handleNFSUnlock){
     return SQLITE_OK;
   }
   unixEnterMutex();
-  h = pFile->h;
   pInode = pFile->pInode;
   assert( pInode->nShared!=0 );
   if( pFile->eFileLock>SHARED_LOCK ){
     assert( pInode->eFileLock==pFile->eFileLock );
-    SimulateIOErrorBenign(1);
-    SimulateIOError( h=(-1) )
-    SimulateIOErrorBenign(0);
 
 #ifndef NDEBUG
     /* When reducing a lock such that other processes can start
@@ -1588,11 +1599,6 @@ static int posixUnlock(sqlite3_file *id, int eFileLock, int handleNFSUnlock){
     ** the file has changed and hence might not know to flush their
     ** cache.  The use of a stale cache can lead to database corruption.
     */
-#if 0
-    assert( pFile->inNormalWrite==0
-         || pFile->dbUpdate==0
-         || pFile->transCntrChng==1 );
-#endif
     pFile->inNormalWrite = 0;
 #endif
 
@@ -1694,9 +1700,6 @@ static int posixUnlock(sqlite3_file *id, int eFileLock, int handleNFSUnlock){
       lock.l_type = F_UNLCK;
       lock.l_whence = SEEK_SET;
       lock.l_start = lock.l_len = 0L;
-      SimulateIOErrorBenign(1);
-      SimulateIOError( h=(-1) )
-      SimulateIOErrorBenign(0);
       if( unixFileLock(pFile, &lock)==0 ){
         pInode->eFileLock = NO_LOCK;
       }else{
@@ -1747,10 +1750,6 @@ static int unixUnlock(sqlite3_file *id, int eFileLock){
 */
 static int closeUnixFile(sqlite3_file *id){
   unixFile *pFile = (unixFile*)id;
-  if( pFile->dirfd>=0 ){
-    robust_close(pFile, pFile->dirfd, __LINE__);
-    pFile->dirfd=-1;
-  }
   if( pFile->h>=0 ){
     robust_close(pFile, pFile->h, __LINE__);
     pFile->h = -1;
@@ -1758,7 +1757,7 @@ static int closeUnixFile(sqlite3_file *id){
 #if OS_VXWORKS
   if( pFile->pId ){
     if( pFile->isDelete ){
-      unlink(pFile->pId->zCanonicalName);
+      osUnlink(pFile->pId->zCanonicalName);
     }
     vxworksReleaseFileId(pFile->pId);
     pFile->pId = 0;
@@ -2007,7 +2006,7 @@ static int dotlockUnlock(sqlite3_file *id, int eFileLock) {
   
   /* To fully unlock the database, delete the lock file */
   assert( eFileLock==NO_LOCK );
-  if( unlink(zLockFile) ){
+  if( osUnlink(zLockFile) ){
     int rc = 0;
     int tErrno = errno;
     if( ENOENT != tErrno ){
@@ -2513,11 +2512,12 @@ static int afpCheckReservedLock(sqlite3_file *id, int *pResOut){
   int rc = SQLITE_OK;
   int reserved = 0;
   unixFile *pFile = (unixFile*)id;
+  afpLockingContext *context;
   
   SimulateIOError( return SQLITE_IOERR_CHECKRESERVEDLOCK; );
   
   assert( pFile );
-  afpLockingContext *context = (afpLockingContext *) pFile->lockingContext;
+  context = (afpLockingContext *) pFile->lockingContext;
   if( context->reserved ){
     *pResOut = 1;
     return SQLITE_OK;
@@ -2657,7 +2657,7 @@ static int afpLock(sqlite3_file *id, int eFileLock){
   ** operating system calls for the specified lock.
   */
   if( eFileLock==SHARED_LOCK ){
-    int lrc1, lrc2, lrc1Errno;
+    int lrc1, lrc2, lrc1Errno = 0;
     long lk, mask;
     
     assert( pInode->nShared==0 );
@@ -3031,17 +3031,19 @@ static int seekAndWrite(unixFile *id, i64 offset, const void *pBuf, int cnt){
 #elif defined(USE_PREAD64)
   do{ got = osPwrite64(id->h, pBuf, cnt, offset);}while( got<0 && errno==EINTR);
 #else
-  newOffset = lseek(id->h, offset, SEEK_SET);
-  SimulateIOError( newOffset-- );
-  if( newOffset!=offset ){
-    if( newOffset == -1 ){
-      ((unixFile*)id)->lastErrno = errno;
-    }else{
-      ((unixFile*)id)->lastErrno = 0;			
+  do{
+    newOffset = lseek(id->h, offset, SEEK_SET);
+    SimulateIOError( newOffset-- );
+    if( newOffset!=offset ){
+      if( newOffset == -1 ){
+        ((unixFile*)id)->lastErrno = errno;
+      }else{
+        ((unixFile*)id)->lastErrno = 0;			
+      }
+      return -1;
     }
-    return -1;
-  }
-  do{ got = osWrite(id->h, pBuf, cnt); }while( got<0 && errno==EINTR );
+    got = osWrite(id->h, pBuf, cnt);
+  }while( got<0 && errno==EINTR );
 #endif
   TIMER_END;
   if( got<0 ){
@@ -3131,11 +3133,11 @@ int sqlite3_fullsync_count = 0;
 
 /*
 ** We do not trust systems to provide a working fdatasync().  Some do.
-** Others do no.  To be safe, we will stick with the (slower) fsync().
-** If you know that your system does support fdatasync() correctly,
+** Others do no.  To be safe, we will stick with the (slightly slower)
+** fsync(). If you know that your system does support fdatasync() correctly,
 ** then simply compile with -Dfdatasync=fdatasync
 */
-#if !defined(fdatasync) && !defined(__linux__)
+#if !defined(fdatasync)
 # define fdatasync fsync
 #endif
 
@@ -3243,6 +3245,50 @@ static int full_fsync(int fd, int fullSync, int dataOnly){
   return rc;
 }
 
+/*
+** Open a file descriptor to the directory containing file zFilename.
+** If successful, *pFd is set to the opened file descriptor and
+** SQLITE_OK is returned. If an error occurs, either SQLITE_NOMEM
+** or SQLITE_CANTOPEN is returned and *pFd is set to an undefined
+** value.
+**
+** The directory file descriptor is used for only one thing - to
+** fsync() a directory to make sure file creation and deletion events
+** are flushed to disk.  Such fsyncs are not needed on newer
+** journaling filesystems, but are required on older filesystems.
+**
+** This routine can be overridden using the xSetSysCall interface.
+** The ability to override this routine was added in support of the
+** chromium sandbox.  Opening a directory is a security risk (we are
+** told) so making it overrideable allows the chromium sandbox to
+** replace this routine with a harmless no-op.  To make this routine
+** a no-op, replace it with a stub that returns SQLITE_OK but leaves
+** *pFd set to a negative number.
+**
+** If SQLITE_OK is returned, the caller is responsible for closing
+** the file descriptor *pFd using close().
+*/
+static int openDirectory(const char *zFilename, int *pFd){
+  int ii;
+  int fd = -1;
+  char zDirname[MAX_PATHNAME+1];
+
+  sqlite3_snprintf(MAX_PATHNAME, zDirname, "%s", zFilename);
+  for(ii=(int)strlen(zDirname); ii>1 && zDirname[ii]!='/'; ii--);
+  if( ii>0 ){
+    zDirname[ii] = '\0';
+    fd = robust_open(zDirname, O_RDONLY|O_BINARY, 0);
+    if( fd>=0 ){
+#ifdef FD_CLOEXEC
+      osFcntl(fd, F_SETFD, osFcntl(fd, F_GETFD, 0) | FD_CLOEXEC);
+#endif
+      OSTRACE(("OPENDIR %-3d %s\n", fd, zDirname));
+    }
+  }
+  *pFd = fd;
+  return (fd>=0?SQLITE_OK:unixLogError(SQLITE_CANTOPEN_BKPT, "open", zDirname));
+}
+
 /*
 ** Make sure all writes to a particular file are committed to disk.
 **
@@ -3283,28 +3329,23 @@ static int unixSync(sqlite3_file *id, int flags){
     pFile->lastErrno = errno;
     return unixLogError(SQLITE_IOERR_FSYNC, "full_fsync", pFile->zPath);
   }
-  if( pFile->dirfd>=0 ){
-    OSTRACE(("DIRSYNC %-3d (have_fullfsync=%d fullsync=%d)\n", pFile->dirfd,
+
+  /* Also fsync the directory containing the file if the DIRSYNC flag
+  ** is set.  This is a one-time occurrance.  Many systems (examples: AIX)
+  ** are unable to fsync a directory, so ignore errors on the fsync.
+  */
+  if( pFile->ctrlFlags & UNIXFILE_DIRSYNC ){
+    int dirfd;
+    OSTRACE(("DIRSYNC %s (have_fullfsync=%d fullsync=%d)\n", pFile->zPath,
             HAVE_FULLFSYNC, isFullsync));
-#ifndef SQLITE_DISABLE_DIRSYNC
-    /* The directory sync is only attempted if full_fsync is
-    ** turned off or unavailable.  If a full_fsync occurred above,
-    ** then the directory sync is superfluous.
-    */
-    if( (!HAVE_FULLFSYNC || !isFullsync) && full_fsync(pFile->dirfd,0,0) ){
-       /*
-       ** We have received multiple reports of fsync() returning
-       ** errors when applied to directories on certain file systems.
-       ** A failed directory sync is not a big deal.  So it seems
-       ** better to ignore the error.  Ticket #1657
-       */
-       /* pFile->lastErrno = errno; */
-       /* return SQLITE_IOERR; */
+    rc = osOpenDirectory(pFile->zPath, &dirfd);
+    if( rc==SQLITE_OK && dirfd>=0 ){
+      full_fsync(dirfd, 0, 0);
+      robust_close(pFile, dirfd, __LINE__);
+    }else if( rc==SQLITE_CANTOPEN ){
+      rc = SQLITE_OK;
     }
-#endif
-    /* Only need to sync once, so close the  directory when we are done */
-    robust_close(pFile, pFile->dirfd, __LINE__);
-    pFile->dirfd = -1;
+    pFile->ctrlFlags &= ~UNIXFILE_DIRSYNC;
   }
   return rc;
 }
@@ -3386,14 +3427,12 @@ static int proxyFileControl(sqlite3_file*,int,void*);
 
 /* 
 ** This function is called to handle the SQLITE_FCNTL_SIZE_HINT 
-** file-control operation.
-**
-** If the user has configured a chunk-size for this file, it could be
-** that the file needs to be extended at this point. Otherwise, the
-** SQLITE_FCNTL_SIZE_HINT operation is a no-op for Unix.
+** file-control operation.  Enlarge the database to nBytes in size
+** (rounded up to the next chunk-size).  If the database is already
+** nBytes or larger, this routine is a no-op.
 */
 static int fcntlSizeHint(unixFile *pFile, i64 nByte){
-  if( pFile->szChunk ){
+  if( pFile->szChunk>0 ){
     i64 nSize;                    /* Required file size */
     struct stat buf;              /* Used to hold return values of fstat() */
    
@@ -3442,21 +3481,37 @@ static int fcntlSizeHint(unixFile *pFile, i64 nByte){
 ** Information and control of an open file handle.
 */
 static int unixFileControl(sqlite3_file *id, int op, void *pArg){
+  unixFile *pFile = (unixFile*)id;
   switch( op ){
     case SQLITE_FCNTL_LOCKSTATE: {
-      *(int*)pArg = ((unixFile*)id)->eFileLock;
+      *(int*)pArg = pFile->eFileLock;
       return SQLITE_OK;
     }
     case SQLITE_LAST_ERRNO: {
-      *(int*)pArg = ((unixFile*)id)->lastErrno;
+      *(int*)pArg = pFile->lastErrno;
       return SQLITE_OK;
     }
     case SQLITE_FCNTL_CHUNK_SIZE: {
-      ((unixFile*)id)->szChunk = *(int *)pArg;
+      pFile->szChunk = *(int *)pArg;
       return SQLITE_OK;
     }
     case SQLITE_FCNTL_SIZE_HINT: {
-      return fcntlSizeHint((unixFile *)id, *(i64 *)pArg);
+      int rc;
+      SimulateIOErrorBenign(1);
+      rc = fcntlSizeHint(pFile, *(i64 *)pArg);
+      SimulateIOErrorBenign(0);
+      return rc;
+    }
+    case SQLITE_FCNTL_PERSIST_WAL: {
+      int bPersist = *(int*)pArg;
+      if( bPersist<0 ){
+        *(int*)pArg = (pFile->ctrlFlags & UNIXFILE_PERSIST_WAL)!=0;
+      }else if( bPersist==0 ){
+        pFile->ctrlFlags &= ~UNIXFILE_PERSIST_WAL;
+      }else{
+        pFile->ctrlFlags |= UNIXFILE_PERSIST_WAL;
+      }
+      return SQLITE_OK;
     }
 #ifndef NDEBUG
     /* The pager calls this method to signal that it has done
@@ -3572,11 +3627,9 @@ struct unixShm {
   unixShmNode *pShmNode;     /* The underlying unixShmNode object */
   unixShm *pNext;            /* Next unixShm with the same unixShmNode */
   u8 hasMutex;               /* True if holding the unixShmNode mutex */
+  u8 id;                     /* Id of this connection within its unixShmNode */
   u16 sharedMask;            /* Mask of shared locks held */
   u16 exclMask;              /* Mask of exclusive locks held */
-#ifdef SQLITE_DEBUG
-  u8 id;                     /* Id of this connection within its unixShmNode */
-#endif
 };
 
 /*
@@ -3672,7 +3725,7 @@ static void unixShmPurge(unixFile *pFd){
   if( p && p->nRef==0 ){
     int i;
     assert( p->pInode==pFd->pInode );
-    if( p->mutex ) sqlite3_mutex_free(p->mutex);
+    sqlite3_mutex_free(p->mutex);
     for(i=0; i<p->nRegion; i++){
       if( p->h>=0 ){
         munmap(p->apRegion[i], p->szRegion);
@@ -3788,16 +3841,15 @@ static int unixOpenSharedMemory(unixFile *pDbFd){
     }
 
     if( pInode->bProcessLock==0 ){
-      pShmNode->h = robust_open(zShmFilename, O_RDWR|O_CREAT,
-                               (sStat.st_mode & 0777));
+      const char *zRO;
+      int openFlags = O_RDWR | O_CREAT;
+      zRO = sqlite3_uri_parameter(pDbFd->zPath, "readonly_shm");
+      if( zRO && sqlite3GetBoolean(zRO) ){
+        openFlags = O_RDONLY;
+        pShmNode->isReadonly = 1;
+      }
+      pShmNode->h = robust_open(zShmFilename, openFlags, (sStat.st_mode&0777));
       if( pShmNode->h<0 ){
-        const char *zRO;
-        zRO = sqlite3_uri_parameter(pDbFd->zPath, "readonly_shm");
-        if( zRO && sqlite3GetBoolean(zRO) ){
-          pShmNode->h = robust_open(zShmFilename, O_RDONLY,
-                                    (sStat.st_mode & 0777));
-          pShmNode->isReadonly = 1;
-        }
         if( pShmNode->h<0 ){
           rc = unixLogError(SQLITE_CANTOPEN_BKPT, "open", zShmFilename);
           goto shm_open_err;
@@ -4141,7 +4193,7 @@ static int unixShmUnmap(
   assert( pShmNode->nRef>0 );
   pShmNode->nRef--;
   if( pShmNode->nRef==0 ){
-    if( deleteFlag && pShmNode->h>=0 ) unlink(pShmNode->zFilename);
+    if( deleteFlag && pShmNode->h>=0 ) osUnlink(pShmNode->zFilename);
     unixShmPurge(pDbFd);
   }
   unixLeaveMutex();
@@ -4454,7 +4506,7 @@ typedef const sqlite3_io_methods *(*finder_type)(const char*,unixFile*);
 static int fillInUnixFile(
   sqlite3_vfs *pVfs,      /* Pointer to vfs object */
   int h,                  /* Open file descriptor of file being opened */
-  int dirfd,              /* Directory file descriptor */
+  int syncDir,            /* True to sync directory on first sync */
   sqlite3_file *pId,      /* Write to the unixFile structure here */
   const char *zFilename,  /* Name of the file being opened */
   int noLock,             /* Omit locking if true */
@@ -4483,9 +4535,11 @@ static int fillInUnixFile(
   assert( zFilename==0 || zFilename[0]=='/' );
 #endif
 
+  /* No locking occurs in temporary files */
+  assert( zFilename!=0 || noLock );
+
   OSTRACE(("OPEN    %-3d %s\n", h, zFilename));
   pNew->h = h;
-  pNew->dirfd = dirfd;
   pNew->zPath = zFilename;
   if( memcmp(pVfs->zName,"unix-excl",10)==0 ){
     pNew->ctrlFlags = UNIXFILE_EXCL;
@@ -4495,6 +4549,9 @@ static int fillInUnixFile(
   if( isReadOnly ){
     pNew->ctrlFlags |= UNIXFILE_RDONLY;
   }
+  if( syncDir ){
+    pNew->ctrlFlags |= UNIXFILE_DIRSYNC;
+  }
 
 #if OS_VXWORKS
   pNew->pId = vxworksFindFileId(zFilename);
@@ -4582,6 +4639,7 @@ static int fillInUnixFile(
     */
     char *zLockFile;
     int nFilename;
+    assert( zFilename!=0 );
     nFilename = (int)strlen(zFilename) + 6;
     zLockFile = (char *)sqlite3_malloc(nFilename);
     if( zLockFile==0 ){
@@ -4621,13 +4679,12 @@ static int fillInUnixFile(
   if( rc!=SQLITE_OK ){
     if( h>=0 ) robust_close(pNew, h, __LINE__);
     h = -1;
-    unlink(zFilename);
+    osUnlink(zFilename);
     isDelete = 0;
   }
   pNew->isDelete = isDelete;
 #endif
   if( rc!=SQLITE_OK ){
-    if( dirfd>=0 ) robust_close(pNew, dirfd, __LINE__);
     if( h>=0 ) robust_close(pNew, h, __LINE__);
   }else{
     pNew->pMethod = pLockingStyle;
@@ -4636,37 +4693,6 @@ static int fillInUnixFile(
   return rc;
 }
 
-/*
-** Open a file descriptor to the directory containing file zFilename.
-** If successful, *pFd is set to the opened file descriptor and
-** SQLITE_OK is returned. If an error occurs, either SQLITE_NOMEM
-** or SQLITE_CANTOPEN is returned and *pFd is set to an undefined
-** value.
-**
-** If SQLITE_OK is returned, the caller is responsible for closing
-** the file descriptor *pFd using close().
-*/
-static int openDirectory(const char *zFilename, int *pFd){
-  int ii;
-  int fd = -1;
-  char zDirname[MAX_PATHNAME+1];
-
-  sqlite3_snprintf(MAX_PATHNAME, zDirname, "%s", zFilename);
-  for(ii=(int)strlen(zDirname); ii>1 && zDirname[ii]!='/'; ii--);
-  if( ii>0 ){
-    zDirname[ii] = '\0';
-    fd = robust_open(zDirname, O_RDONLY|O_BINARY, 0);
-    if( fd>=0 ){
-#ifdef FD_CLOEXEC
-      osFcntl(fd, F_SETFD, osFcntl(fd, F_GETFD, 0) | FD_CLOEXEC);
-#endif
-      OSTRACE(("OPENDIR %-3d %s\n", fd, zDirname));
-    }
-  }
-  *pFd = fd;
-  return (fd>=0?SQLITE_OK:unixLogError(SQLITE_CANTOPEN_BKPT, "open", zDirname));
-}
-
 /*
 ** Return the name of a directory in which to put temporary files.
 ** If no suitable temporary file directory can be found, return NULL.
@@ -4781,7 +4807,7 @@ static UnixUnusedFd *findReusableFd(const char *zPath, int flags){
   **
   ** Even if a subsequent open() call does succeed, the consequences of
   ** not searching for a resusable file descriptor are not dire.  */
-  if( 0==stat(zPath, &sStat) ){
+  if( 0==osStat(zPath, &sStat) ){
     unixInodeInfo *pInode;
 
     unixEnterMutex();
@@ -4848,16 +4874,24 @@ static int findCreateFileMode(
     **   "<path to db>-journalNN"
     **   "<path to db>-walNN"
     **
-    ** where NN is a 4 digit decimal number. The NN naming schemes are 
+    ** where NN is a decimal number. The NN naming schemes are 
     ** used by the test_multiplex.c module.
     */
     nDb = sqlite3Strlen30(zPath) - 1; 
-    while( nDb>0 && zPath[nDb]!='-' ) nDb--;
-    if( nDb==0 ) return SQLITE_OK;
+#ifdef SQLITE_ENABLE_8_3_NAMES
+    while( nDb>0 && !sqlite3Isalnum(zPath[nDb]) ) nDb--;
+    if( nDb==0 || zPath[nDb]!='-' ) return SQLITE_OK;
+#else
+    while( zPath[nDb]!='-' ){
+      assert( nDb>0 );
+      assert( zPath[nDb]!='\n' );
+      nDb--;
+    }
+#endif
     memcpy(zDb, zPath, nDb);
     zDb[nDb] = '\0';
 
-    if( 0==stat(zDb, &sStat) ){
+    if( 0==osStat(zDb, &sStat) ){
       *pMode = sStat.st_mode & 0777;
     }else{
       rc = SQLITE_IOERR_FSTAT;
@@ -4899,7 +4933,6 @@ static int unixOpen(
 ){
   unixFile *p = (unixFile *)pFile;
   int fd = -1;                   /* File descriptor returned by open() */
-  int dirfd = -1;                /* Directory file descriptor */
   int openFlags = 0;             /* Flags to pass to open() */
   int eType = flags&0xFFFFFF00;  /* Type of file to open */
   int noLock;                    /* True to omit locking primitives */
@@ -4913,12 +4946,15 @@ static int unixOpen(
 #if SQLITE_ENABLE_LOCKING_STYLE
   int isAutoProxy  = (flags & SQLITE_OPEN_AUTOPROXY);
 #endif
+#if defined(__APPLE__) || SQLITE_ENABLE_LOCKING_STYLE
+  struct statfs fsInfo;
+#endif
 
   /* If creating a master or main-file journal, this function will open
   ** a file-descriptor on the directory too. The first time unixSync()
   ** is called the directory file descriptor will be fsync()ed and close()d.
   */
-  int isOpenDirectory = (isCreate && (
+  int syncDir = (isCreate && (
         eType==SQLITE_OPEN_MASTER_JOURNAL 
      || eType==SQLITE_OPEN_MAIN_JOURNAL 
      || eType==SQLITE_OPEN_WAL
@@ -4972,7 +5008,7 @@ static int unixOpen(
     p->pUnused = pUnused;
   }else if( !zName ){
     /* If zName is NULL, the upper layer is requesting a temp file. */
-    assert(isDelete && !isOpenDirectory);
+    assert(isDelete && !syncDir);
     rc = unixGetTempname(MAX_PATHNAME+1, zTmpname);
     if( rc!=SQLITE_OK ){
       return rc;
@@ -5028,7 +5064,7 @@ static int unixOpen(
 #if OS_VXWORKS
     zPath = zName;
 #else
-    unlink(zName);
+    osUnlink(zName);
 #endif
   }
 #if SQLITE_ENABLE_LOCKING_STYLE
@@ -5037,19 +5073,6 @@ static int unixOpen(
   }
 #endif
 
-  if( isOpenDirectory ){
-    rc = openDirectory(zPath, &dirfd);
-    if( rc!=SQLITE_OK ){
-      /* It is safe to close fd at this point, because it is guaranteed not
-      ** to be open on a database file. If it were open on a database file,
-      ** it would not be safe to close as this would release any locks held
-      ** on the file by this process.  */
-      assert( eType!=SQLITE_OPEN_MAIN_DB );
-      robust_close(p, fd, __LINE__);
-      goto open_finished;
-    }
-  }
-
 #ifdef FD_CLOEXEC
   osFcntl(fd, F_SETFD, osFcntl(fd, F_GETFD, 0) | FD_CLOEXEC);
 #endif
@@ -5058,10 +5081,8 @@ static int unixOpen(
 
   
 #if defined(__APPLE__) || SQLITE_ENABLE_LOCKING_STYLE
-  struct statfs fsInfo;
   if( fstatfs(fd, &fsInfo) == -1 ){
     ((unixFile*)pFile)->lastErrno = errno;
-    if( dirfd>=0 ) robust_close(p, dirfd, __LINE__);
     robust_close(p, fd, __LINE__);
     return SQLITE_IOERR_ACCESS;
   }
@@ -5083,7 +5104,6 @@ static int unixOpen(
     if( envforce!=NULL ){
       useProxy = atoi(envforce)>0;
     }else{
-      struct statfs fsInfo;
       if( statfs(zPath, &fsInfo) == -1 ){
         /* In theory, the close(fd) call is sub-optimal. If the file opened
         ** with fd is a database file, and there are other connections open
@@ -5093,9 +5113,6 @@ static int unixOpen(
         ** not while other file descriptors opened by the same process on
         ** the same file are working.  */
         p->lastErrno = errno;
-        if( dirfd>=0 ){
-          robust_close(p, dirfd, __LINE__);
-        }
         robust_close(p, fd, __LINE__);
         rc = SQLITE_IOERR_ACCESS;
         goto open_finished;
@@ -5103,7 +5120,7 @@ static int unixOpen(
       useProxy = !(fsInfo.f_flags&MNT_LOCAL);
     }
     if( useProxy ){
-      rc = fillInUnixFile(pVfs, fd, dirfd, pFile, zPath, noLock,
+      rc = fillInUnixFile(pVfs, fd, syncDir, pFile, zPath, noLock,
                           isDelete, isReadonly);
       if( rc==SQLITE_OK ){
         rc = proxyTransformUnixFile((unixFile*)pFile, ":auto:");
@@ -5121,7 +5138,7 @@ static int unixOpen(
   }
 #endif
   
-  rc = fillInUnixFile(pVfs, fd, dirfd, pFile, zPath, noLock,
+  rc = fillInUnixFile(pVfs, fd, syncDir, pFile, zPath, noLock,
                       isDelete, isReadonly);
 open_finished:
   if( rc!=SQLITE_OK ){
@@ -5143,13 +5160,13 @@ static int unixDelete(
   int rc = SQLITE_OK;
   UNUSED_PARAMETER(NotUsed);
   SimulateIOError(return SQLITE_IOERR_DELETE);
-  if( unlink(zPath)==(-1) && errno!=ENOENT ){
+  if( osUnlink(zPath)==(-1) && errno!=ENOENT ){
     return unixLogError(SQLITE_IOERR_DELETE, "unlink", zPath);
   }
 #ifndef SQLITE_DISABLE_DIRSYNC
   if( dirSync ){
     int fd;
-    rc = openDirectory(zPath, &fd);
+    rc = osOpenDirectory(zPath, &fd);
     if( rc==SQLITE_OK ){
 #if OS_VXWORKS
       if( fsync(fd)==-1 )
@@ -5160,6 +5177,8 @@ static int unixDelete(
         rc = unixLogError(SQLITE_IOERR_DIR_FSYNC, "fsync", zPath);
       }
       robust_close(0, fd, __LINE__);
+    }else if( rc==SQLITE_CANTOPEN ){
+      rc = SQLITE_OK;
     }
   }
 #endif
@@ -5202,7 +5221,7 @@ static int unixAccess(
   *pResOut = (osAccess(zPath, amode)==0);
   if( flags==SQLITE_ACCESS_EXISTS && *pResOut ){
     struct stat buf;
-    if( 0==stat(zPath, &buf) && buf.st_size==0 ){
+    if( 0==osStat(zPath, &buf) && buf.st_size==0 ){
       *pResOut = 0;
     }
   }
@@ -5400,10 +5419,12 @@ int sqlite3_current_time = 0;  /* Fake system time in seconds since 1970. */
 ** epoch of noon in Greenwich on November 24, 4714 B.C according to the
 ** proleptic Gregorian calendar.
 **
-** On success, return 0.  Return 1 if the time and date cannot be found.
+** On success, return SQLITE_OK.  Return SQLITE_ERROR if the time and date 
+** cannot be found.
 */
 static int unixCurrentTimeInt64(sqlite3_vfs *NotUsed, sqlite3_int64 *piNow){
   static const sqlite3_int64 unixEpoch = 24405875*(sqlite3_int64)8640000;
+  int rc = SQLITE_OK;
 #if defined(NO_GETTOD)
   time_t t;
   time(&t);
@@ -5414,8 +5435,11 @@ static int unixCurrentTimeInt64(sqlite3_vfs *NotUsed, sqlite3_int64 *piNow){
   *piNow = unixEpoch + 1000*(sqlite3_int64)sNow.tv_sec + sNow.tv_nsec/1000000;
 #else
   struct timeval sNow;
-  gettimeofday(&sNow, 0);
-  *piNow = unixEpoch + 1000*(sqlite3_int64)sNow.tv_sec + sNow.tv_usec/1000;
+  if( gettimeofday(&sNow, 0)==0 ){
+    *piNow = unixEpoch + 1000*(sqlite3_int64)sNow.tv_sec + sNow.tv_usec/1000;
+  }else{
+    rc = SQLITE_ERROR;
+  }
 #endif
 
 #ifdef SQLITE_TEST
@@ -5424,7 +5448,7 @@ static int unixCurrentTimeInt64(sqlite3_vfs *NotUsed, sqlite3_int64 *piNow){
   }
 #endif
   UNUSED_PARAMETER(NotUsed);
-  return 0;
+  return rc;
 }
 
 /*
@@ -5433,11 +5457,12 @@ static int unixCurrentTimeInt64(sqlite3_vfs *NotUsed, sqlite3_int64 *piNow){
 ** return 0.  Return 1 if the time and date cannot be found.
 */
 static int unixCurrentTime(sqlite3_vfs *NotUsed, double *prNow){
-  sqlite3_int64 i;
+  sqlite3_int64 i = 0;
+  int rc;
   UNUSED_PARAMETER(NotUsed);
-  unixCurrentTimeInt64(0, &i);
+  rc = unixCurrentTimeInt64(0, &i);
   *prNow = i/86400000.0;
-  return 0;
+  return rc;
 }
 
 /*
@@ -5721,7 +5746,6 @@ static int proxyCreateUnixFile(
     int islockfile           /* if non zero missing dirs will be created */
 ) {
   int fd = -1;
-  int dirfd = -1;
   unixFile *pNew;
   int rc = SQLITE_OK;
   int openFlags = O_RDWR | O_CREAT;
@@ -5786,7 +5810,7 @@ static int proxyCreateUnixFile(
   pUnused->flags = openFlags;
   pNew->pUnused = pUnused;
   
-  rc = fillInUnixFile(&dummyVfs, fd, dirfd, (sqlite3_file*)pNew, path, 0, 0, 0);
+  rc = fillInUnixFile(&dummyVfs, fd, 0, (sqlite3_file*)pNew, path, 0, 0, 0);
   if( rc==SQLITE_OK ){
     *ppFile = pNew;
     return SQLITE_OK;
@@ -5826,6 +5850,8 @@ static int proxyGetHostID(unsigned char *pHostID, int *pError){
       return SQLITE_IOERR;
     }
   }
+#else
+  UNUSED_PARAMETER(pError);
 #endif
 #ifdef SQLITE_TEST
   /* simulate multiple hosts by creating unique hostid file paths */
@@ -5900,7 +5926,7 @@ static int proxyBreakConchLock(unixFile *pFile, uuid_t myHostID){
 end_breaklock:
   if( rc ){
     if( fd>=0 ){
-      unlink(tPath);
+      osUnlink(tPath);
       robust_close(pFile, fd, __LINE__);
     }
     fprintf(stderr, "failed to break stale lock on %s, %s\n", cPath, errmsg);
@@ -5918,6 +5944,7 @@ static int proxyConchLock(unixFile *pFile, uuid_t myHostID, int lockType){
   int nTries = 0;
   struct timespec conchModTime;
   
+  memset(&conchModTime, 0, sizeof(conchModTime));
   do {
     rc = conchFile->pMethod->xLock((sqlite3_file*)conchFile, lockType);
     nTries ++;
@@ -6149,11 +6176,12 @@ static int proxyTakeConch(unixFile *pFile){
     end_takeconch:
       OSTRACE(("TRANSPROXY: CLOSE  %d\n", pFile->h));
       if( rc==SQLITE_OK && pFile->openFlags ){
+        int fd;
         if( pFile->h>=0 ){
           robust_close(pFile, pFile->h, __LINE__);
         }
         pFile->h = -1;
-        int fd = robust_open(pCtx->dbPath, pFile->openFlags,
+        fd = robust_open(pCtx->dbPath, pFile->openFlags,
                       SQLITE_DEFAULT_FILE_PERMISSIONS);
         OSTRACE(("TRANSPROXY: OPEN  %d\n", fd));
         if( fd>=0 ){
@@ -6723,7 +6751,7 @@ int sqlite3_os_init(void){
 
   /* Double-check that the aSyscall[] array has been constructed
   ** correctly.  See ticket [bb3a86e890c8e96ab] */
-  assert( ArraySize(aSyscall)==16 );
+  assert( ArraySize(aSyscall)==18 );
 
   /* Register all VFSes defined in the aVfs[] array */
   for(i=0; i<(sizeof(aVfs)/sizeof(sqlite3_vfs)); i++){
diff --git a/src/os_win.c b/src/os_win.c
index bd0f2f21..45180304 100644
--- a/src/os_win.c
+++ b/src/os_win.c
@@ -102,8 +102,9 @@ struct winFile {
   const sqlite3_io_methods *pMethod; /*** Must be first ***/
   sqlite3_vfs *pVfs;      /* The VFS used to open this file */
   HANDLE h;               /* Handle for accessing the file */
-  unsigned char locktype; /* Type of lock currently held on this file */
+  u8 locktype;            /* Type of lock currently held on this file */
   short sharedLockByte;   /* Randomly chosen byte used as a shared lock */
+  u8 bPersistWal;         /* True to persist WAL files */
   DWORD lastErrno;        /* The Windows errno from the last I/O error */
   DWORD sectorSize;       /* Sector size of the device file is on */
   winShm *pShm;           /* Instance of shared memory on this file */
@@ -118,6 +119,76 @@ struct winFile {
 #endif
 };
 
+/*
+ * If compiled with SQLITE_WIN32_MALLOC on Windows, we will use the
+ * various Win32 API heap functions instead of our own.
+ */
+#ifdef SQLITE_WIN32_MALLOC
+/*
+ * The initial size of the Win32-specific heap.  This value may be zero.
+ */
+#ifndef SQLITE_WIN32_HEAP_INIT_SIZE
+#  define SQLITE_WIN32_HEAP_INIT_SIZE ((SQLITE_DEFAULT_CACHE_SIZE) * \
+                                       (SQLITE_DEFAULT_PAGE_SIZE) + 4194304)
+#endif
+
+/*
+ * The maximum size of the Win32-specific heap.  This value may be zero.
+ */
+#ifndef SQLITE_WIN32_HEAP_MAX_SIZE
+#  define SQLITE_WIN32_HEAP_MAX_SIZE  (0)
+#endif
+
+/*
+ * The extra flags to use in calls to the Win32 heap APIs.  This value may be
+ * zero for the default behavior.
+ */
+#ifndef SQLITE_WIN32_HEAP_FLAGS
+#  define SQLITE_WIN32_HEAP_FLAGS     (0)
+#endif
+
+/*
+** The winMemData structure stores information required by the Win32-specific
+** sqlite3_mem_methods implementation.
+*/
+typedef struct winMemData winMemData;
+struct winMemData {
+#ifndef NDEBUG
+  u32 magic;    /* Magic number to detect structure corruption. */
+#endif
+  HANDLE hHeap; /* The handle to our heap. */
+  BOOL bOwned;  /* Do we own the heap (i.e. destroy it on shutdown)? */
+};
+
+#ifndef NDEBUG
+#define WINMEM_MAGIC     0x42b2830b
+#endif
+
+static struct winMemData win_mem_data = {
+#ifndef NDEBUG
+  WINMEM_MAGIC,
+#endif
+  NULL, FALSE
+};
+
+#ifndef NDEBUG
+#define winMemAssertMagic() assert( win_mem_data.magic==WINMEM_MAGIC )
+#else
+#define winMemAssertMagic()
+#endif
+
+#define winMemGetHeap() win_mem_data.hHeap
+
+static void *winMemMalloc(int nBytes);
+static void winMemFree(void *pPrior);
+static void *winMemRealloc(void *pPrior, int nBytes);
+static int winMemSize(void *p);
+static int winMemRoundup(int n);
+static int winMemInit(void *pAppData);
+static void winMemShutdown(void *pAppData);
+
+const sqlite3_mem_methods *sqlite3MemGetWin32(void);
+#endif /* SQLITE_WIN32_MALLOC */
 
 /*
 ** Forward prototypes.
@@ -170,6 +241,188 @@ static int sqlite3_os_type = 0;
   }
 #endif /* SQLITE_OS_WINCE */
 
+#ifdef SQLITE_WIN32_MALLOC
+/*
+** Allocate nBytes of memory.
+*/
+static void *winMemMalloc(int nBytes){
+  HANDLE hHeap;
+  void *p;
+
+  winMemAssertMagic();
+  hHeap = winMemGetHeap();
+  assert( hHeap!=0 );
+  assert( hHeap!=INVALID_HANDLE_VALUE );
+#ifdef SQLITE_WIN32_MALLOC_VALIDATE
+  assert ( HeapValidate(hHeap, SQLITE_WIN32_HEAP_FLAGS, NULL) );
+#endif
+  assert( nBytes>=0 );
+  p = HeapAlloc(hHeap, SQLITE_WIN32_HEAP_FLAGS, (SIZE_T)nBytes);
+  if( !p ){
+    sqlite3_log(SQLITE_NOMEM, "failed to HeapAlloc %u bytes (%d), heap=%p",
+        nBytes, GetLastError(), (void*)hHeap);
+  }
+  return p;
+}
+
+/*
+** Free memory.
+*/
+static void winMemFree(void *pPrior){
+  HANDLE hHeap;
+
+  winMemAssertMagic();
+  hHeap = winMemGetHeap();
+  assert( hHeap!=0 );
+  assert( hHeap!=INVALID_HANDLE_VALUE );
+#ifdef SQLITE_WIN32_MALLOC_VALIDATE
+  assert ( HeapValidate(hHeap, SQLITE_WIN32_HEAP_FLAGS, pPrior) );
+#endif
+  if( !pPrior ) return; /* Passing NULL to HeapFree is undefined. */
+  if( !HeapFree(hHeap, SQLITE_WIN32_HEAP_FLAGS, pPrior) ){
+    sqlite3_log(SQLITE_NOMEM, "failed to HeapFree block %p (%d), heap=%p",
+        pPrior, GetLastError(), (void*)hHeap);
+  }
+}
+
+/*
+** Change the size of an existing memory allocation
+*/
+static void *winMemRealloc(void *pPrior, int nBytes){
+  HANDLE hHeap;
+  void *p;
+
+  winMemAssertMagic();
+  hHeap = winMemGetHeap();
+  assert( hHeap!=0 );
+  assert( hHeap!=INVALID_HANDLE_VALUE );
+#ifdef SQLITE_WIN32_MALLOC_VALIDATE
+  assert ( HeapValidate(hHeap, SQLITE_WIN32_HEAP_FLAGS, pPrior) );
+#endif
+  assert( nBytes>=0 );
+  if( !pPrior ){
+    p = HeapAlloc(hHeap, SQLITE_WIN32_HEAP_FLAGS, (SIZE_T)nBytes);
+  }else{
+    p = HeapReAlloc(hHeap, SQLITE_WIN32_HEAP_FLAGS, pPrior, (SIZE_T)nBytes);
+  }
+  if( !p ){
+    sqlite3_log(SQLITE_NOMEM, "failed to %s %u bytes (%d), heap=%p",
+        pPrior ? "HeapReAlloc" : "HeapAlloc", nBytes, GetLastError(),
+        (void*)hHeap);
+  }
+  return p;
+}
+
+/*
+** Return the size of an outstanding allocation, in bytes.
+*/
+static int winMemSize(void *p){
+  HANDLE hHeap;
+  SIZE_T n;
+
+  winMemAssertMagic();
+  hHeap = winMemGetHeap();
+  assert( hHeap!=0 );
+  assert( hHeap!=INVALID_HANDLE_VALUE );
+#ifdef SQLITE_WIN32_MALLOC_VALIDATE
+  assert ( HeapValidate(hHeap, SQLITE_WIN32_HEAP_FLAGS, NULL) );
+#endif
+  if( !p ) return 0;
+  n = HeapSize(hHeap, SQLITE_WIN32_HEAP_FLAGS, p);
+  if( n==(SIZE_T)-1 ){
+    sqlite3_log(SQLITE_NOMEM, "failed to HeapSize block %p (%d), heap=%p",
+        p, GetLastError(), (void*)hHeap);
+    return 0;
+  }
+  return (int)n;
+}
+
+/*
+** Round up a request size to the next valid allocation size.
+*/
+static int winMemRoundup(int n){
+  return n;
+}
+
+/*
+** Initialize this module.
+*/
+static int winMemInit(void *pAppData){
+  winMemData *pWinMemData = (winMemData *)pAppData;
+
+  if( !pWinMemData ) return SQLITE_ERROR;
+  assert( pWinMemData->magic==WINMEM_MAGIC );
+  if( !pWinMemData->hHeap ){
+    pWinMemData->hHeap = HeapCreate(SQLITE_WIN32_HEAP_FLAGS,
+                                    SQLITE_WIN32_HEAP_INIT_SIZE,
+                                    SQLITE_WIN32_HEAP_MAX_SIZE);
+    if( !pWinMemData->hHeap ){
+      sqlite3_log(SQLITE_NOMEM,
+          "failed to HeapCreate (%d), flags=%u, initSize=%u, maxSize=%u",
+          GetLastError(), SQLITE_WIN32_HEAP_FLAGS, SQLITE_WIN32_HEAP_INIT_SIZE,
+          SQLITE_WIN32_HEAP_MAX_SIZE);
+      return SQLITE_NOMEM;
+    }
+    pWinMemData->bOwned = TRUE;
+  }
+  assert( pWinMemData->hHeap!=0 );
+  assert( pWinMemData->hHeap!=INVALID_HANDLE_VALUE );
+#ifdef SQLITE_WIN32_MALLOC_VALIDATE
+  assert( HeapValidate(pWinMemData->hHeap, SQLITE_WIN32_HEAP_FLAGS, NULL) );
+#endif
+  return SQLITE_OK;
+}
+
+/*
+** Deinitialize this module.
+*/
+static void winMemShutdown(void *pAppData){
+  winMemData *pWinMemData = (winMemData *)pAppData;
+
+  if( !pWinMemData ) return;
+  if( pWinMemData->hHeap ){
+    assert( pWinMemData->hHeap!=INVALID_HANDLE_VALUE );
+#ifdef SQLITE_WIN32_MALLOC_VALIDATE
+    assert( HeapValidate(pWinMemData->hHeap, SQLITE_WIN32_HEAP_FLAGS, NULL) );
+#endif
+    if( pWinMemData->bOwned ){
+      if( !HeapDestroy(pWinMemData->hHeap) ){
+        sqlite3_log(SQLITE_NOMEM, "failed to HeapDestroy (%d), heap=%p",
+            GetLastError(), (void*)pWinMemData->hHeap);
+      }
+      pWinMemData->bOwned = FALSE;
+    }
+    pWinMemData->hHeap = NULL;
+  }
+}
+
+/*
+** Populate the low-level memory allocation function pointers in
+** sqlite3GlobalConfig.m with pointers to the routines in this file. The
+** arguments specify the block of memory to manage.
+**
+** This routine is only called by sqlite3_config(), and therefore
+** is not required to be threadsafe (it is not).
+*/
+const sqlite3_mem_methods *sqlite3MemGetWin32(void){
+  static const sqlite3_mem_methods winMemMethods = {
+    winMemMalloc,
+    winMemFree,
+    winMemRealloc,
+    winMemSize,
+    winMemRoundup,
+    winMemInit,
+    winMemShutdown,
+    &win_mem_data
+  };
+  return &winMemMethods;
+}
+
+void sqlite3MemSetDefault(void){
+  sqlite3_config(SQLITE_CONFIG_MALLOC, sqlite3MemGetWin32());
+}
+#endif /* SQLITE_WIN32_MALLOC */
+
 /*
 ** Convert a UTF-8 string to microsoft unicode (UTF-16?). 
 **
@@ -402,6 +655,54 @@ static int winLogErrorAtLine(
   return errcode;
 }
 
+/*
+** The number of times that a ReadFile(), WriteFile(), and DeleteFile()
+** will be retried following a locking error - probably caused by 
+** antivirus software.  Also the initial delay before the first retry.
+** The delay increases linearly with each retry.
+*/
+#ifndef SQLITE_WIN32_IOERR_RETRY
+# define SQLITE_WIN32_IOERR_RETRY 10
+#endif
+#ifndef SQLITE_WIN32_IOERR_RETRY_DELAY
+# define SQLITE_WIN32_IOERR_RETRY_DELAY 25
+#endif
+static int win32IoerrRetry = SQLITE_WIN32_IOERR_RETRY;
+static int win32IoerrRetryDelay = SQLITE_WIN32_IOERR_RETRY_DELAY;
+
+/*
+** If a ReadFile() or WriteFile() error occurs, invoke this routine
+** to see if it should be retried.  Return TRUE to retry.  Return FALSE
+** to give up with an error.
+*/
+static int retryIoerr(int *pnRetry){
+  DWORD e;
+  if( *pnRetry>=win32IoerrRetry ){
+    return 0;
+  }
+  e = GetLastError();
+  if( e==ERROR_ACCESS_DENIED ||
+      e==ERROR_LOCK_VIOLATION ||
+      e==ERROR_SHARING_VIOLATION ){
+    Sleep(win32IoerrRetryDelay*(1+*pnRetry));
+    ++*pnRetry;
+    return 1;
+  }
+  return 0;
+}
+
+/*
+** Log a I/O error retry episode.
+*/
+static void logIoerr(int nRetry){
+  if( nRetry ){
+    sqlite3_log(SQLITE_IOERR, 
+      "delayed %dms for lock/sharing conflict",
+      win32IoerrRetryDelay*nRetry*(nRetry+1)/2
+    );
+  }
+}
+
 #if SQLITE_OS_WINCE
 /*************************************************************************
 ** This section contains code for WinCE only.
@@ -820,6 +1121,7 @@ static int winRead(
 ){
   winFile *pFile = (winFile*)id;  /* file handle */
   DWORD nRead;                    /* Number of bytes actually read from file */
+  int nRetry = 0;                 /* Number of retrys */
 
   assert( id!=0 );
   SimulateIOError(return SQLITE_IOERR_READ);
@@ -828,10 +1130,12 @@ static int winRead(
   if( seekWinFile(pFile, offset) ){
     return SQLITE_FULL;
   }
-  if( !ReadFile(pFile->h, pBuf, amt, &nRead, 0) ){
+  while( !ReadFile(pFile->h, pBuf, amt, &nRead, 0) ){
+    if( retryIoerr(&nRetry) ) continue;
     pFile->lastErrno = GetLastError();
     return winLogError(SQLITE_IOERR_READ, "winRead", pFile->zPath);
   }
+  logIoerr(nRetry);
   if( nRead<(DWORD)amt ){
     /* Unread parts of the buffer must be zero-filled */
     memset(&((char*)pBuf)[nRead], 0, amt-nRead);
@@ -853,6 +1157,7 @@ static int winWrite(
 ){
   int rc;                         /* True if error has occured, else false */
   winFile *pFile = (winFile*)id;  /* File handle */
+  int nRetry = 0;                 /* Number of retries */
 
   assert( amt>0 );
   assert( pFile );
@@ -867,7 +1172,12 @@ static int winWrite(
     int nRem = amt;               /* Number of bytes yet to be written */
     DWORD nWrite;                 /* Bytes written by each WriteFile() call */
 
-    while( nRem>0 && WriteFile(pFile->h, aRem, nRem, &nWrite, 0) && nWrite>0 ){
+    while( nRem>0 ){
+      if( !WriteFile(pFile->h, aRem, nRem, &nWrite, 0) ){
+        if( retryIoerr(&nRetry) ) continue;
+        break;
+      }
+      if( nWrite<=0 ) break;
       aRem += nWrite;
       nRem -= nWrite;
     }
@@ -883,6 +1193,8 @@ static int winWrite(
       return SQLITE_FULL;
     }
     return winLogError(SQLITE_IOERR_WRITE, "winWrite", pFile->zPath);
+  }else{
+    logIoerr(nRetry);
   }
   return SQLITE_OK;
 }
@@ -904,7 +1216,7 @@ static int winTruncate(sqlite3_file *id, sqlite3_int64 nByte){
   ** actual file size after the operation may be larger than the requested
   ** size).
   */
-  if( pFile->szChunk ){
+  if( pFile->szChunk>0 ){
     nByte = ((nByte + pFile->szChunk - 1)/pFile->szChunk) * pFile->szChunk;
   }
 
@@ -933,9 +1245,19 @@ int sqlite3_fullsync_count = 0;
 ** Make sure all writes to a particular file are committed to disk.
 */
 static int winSync(sqlite3_file *id, int flags){
-#if !defined(NDEBUG) || !defined(SQLITE_NO_SYNC) || defined(SQLITE_DEBUG)
-  winFile *pFile = (winFile*)id;
+#ifndef SQLITE_NO_SYNC
+  /*
+  ** Used only when SQLITE_NO_SYNC is not defined.
+   */
   BOOL rc;
+#endif
+#if !defined(NDEBUG) || !defined(SQLITE_NO_SYNC) || \
+    (defined(SQLITE_TEST) && defined(SQLITE_DEBUG))
+  /*
+  ** Used when SQLITE_NO_SYNC is not defined and by the assert() and/or
+  ** OSTRACE() macros.
+   */
+  winFile *pFile = (winFile*)id;
 #else
   UNUSED_PARAMETER(id);
 #endif
@@ -1276,29 +1598,62 @@ static int winUnlock(sqlite3_file *id, int locktype){
 ** Control and query of the open file handle.
 */
 static int winFileControl(sqlite3_file *id, int op, void *pArg){
+  winFile *pFile = (winFile*)id;
   switch( op ){
     case SQLITE_FCNTL_LOCKSTATE: {
-      *(int*)pArg = ((winFile*)id)->locktype;
+      *(int*)pArg = pFile->locktype;
       return SQLITE_OK;
     }
     case SQLITE_LAST_ERRNO: {
-      *(int*)pArg = (int)((winFile*)id)->lastErrno;
+      *(int*)pArg = (int)pFile->lastErrno;
       return SQLITE_OK;
     }
     case SQLITE_FCNTL_CHUNK_SIZE: {
-      ((winFile*)id)->szChunk = *(int *)pArg;
+      pFile->szChunk = *(int *)pArg;
       return SQLITE_OK;
     }
     case SQLITE_FCNTL_SIZE_HINT: {
-      sqlite3_int64 sz = *(sqlite3_int64*)pArg;
-      SimulateIOErrorBenign(1);
-      winTruncate(id, sz);
-      SimulateIOErrorBenign(0);
+      if( pFile->szChunk>0 ){
+        sqlite3_int64 oldSz;
+        int rc = winFileSize(id, &oldSz);
+        if( rc==SQLITE_OK ){
+          sqlite3_int64 newSz = *(sqlite3_int64*)pArg;
+          if( newSz>oldSz ){
+            SimulateIOErrorBenign(1);
+            rc = winTruncate(id, newSz);
+            SimulateIOErrorBenign(0);
+          }
+        }
+        return rc;
+      }
+      return SQLITE_OK;
+    }
+    case SQLITE_FCNTL_PERSIST_WAL: {
+      int bPersist = *(int*)pArg;
+      if( bPersist<0 ){
+        *(int*)pArg = pFile->bPersistWal;
+      }else{
+        pFile->bPersistWal = bPersist!=0;
+      }
       return SQLITE_OK;
     }
     case SQLITE_FCNTL_SYNC_OMITTED: {
       return SQLITE_OK;
     }
+    case SQLITE_FCNTL_WIN32_AV_RETRY: {
+      int *a = (int*)pArg;
+      if( a[0]>0 ){
+        win32IoerrRetry = a[0];
+      }else{
+        a[0] = win32IoerrRetry;
+      }
+      if( a[1]>0 ){
+        win32IoerrRetryDelay = a[1];
+      }else{
+        a[1] = win32IoerrRetryDelay;
+      }
+      return SQLITE_OK;
+    }
   }
   return SQLITE_NOTFOUND;
 }
@@ -2107,6 +2462,7 @@ static int winOpen(
   winFile *pFile = (winFile*)id;
   void *zConverted;              /* Filename in OS encoding */
   const char *zUtf8Name = zName; /* Filename in UTF-8 encoding */
+  int cnt = 0;
 
   /* If argument zPath is a NULL pointer, this function is required to open
   ** a temporary file. Use this buffer to store the file name in.
@@ -2226,31 +2582,31 @@ static int winOpen(
 #endif
 
   if( isNT() ){
-    h = CreateFileW((WCHAR*)zConverted,
-       dwDesiredAccess,
-       dwShareMode,
-       NULL,
-       dwCreationDisposition,
-       dwFlagsAndAttributes,
-       NULL
-    );
+    while( (h = CreateFileW((WCHAR*)zConverted,
+                            dwDesiredAccess,
+                            dwShareMode, NULL,
+                            dwCreationDisposition,
+                            dwFlagsAndAttributes,
+                            NULL))==INVALID_HANDLE_VALUE &&
+                            retryIoerr(&cnt) ){}
 /* isNT() is 1 if SQLITE_OS_WINCE==1, so this else is never executed. 
 ** Since the ASCII version of these Windows API do not exist for WINCE,
 ** it's important to not reference them for WINCE builds.
 */
 #if SQLITE_OS_WINCE==0
   }else{
-    h = CreateFileA((char*)zConverted,
-       dwDesiredAccess,
-       dwShareMode,
-       NULL,
-       dwCreationDisposition,
-       dwFlagsAndAttributes,
-       NULL
-    );
+    while( (h = CreateFileA((char*)zConverted,
+                            dwDesiredAccess,
+                            dwShareMode, NULL,
+                            dwCreationDisposition,
+                            dwFlagsAndAttributes,
+                            NULL))==INVALID_HANDLE_VALUE &&
+                            retryIoerr(&cnt) ){}
 #endif
   }
 
+  logIoerr(cnt);
+
   OSTRACE(("OPEN %d %s 0x%lx %s\n", 
            h, zName, dwDesiredAccess, 
            h==INVALID_HANDLE_VALUE ? "failed" : "ok"));
@@ -2259,7 +2615,7 @@ static int winOpen(
     pFile->lastErrno = GetLastError();
     winLogError(SQLITE_CANTOPEN, "winOpen", zUtf8Name);
     free(zConverted);
-    if( isReadWrite ){
+    if( isReadWrite && !isExclusive ){
       return winOpen(pVfs, zName, id, 
              ((flags|SQLITE_OPEN_READONLY)&~(SQLITE_OPEN_CREATE|SQLITE_OPEN_READWRITE)), pOutFlags);
     }else{
@@ -2316,15 +2672,13 @@ static int winOpen(
 ** to MX_DELETION_ATTEMPTs deletion attempts are run before giving
 ** up and returning an error.
 */
-#define MX_DELETION_ATTEMPTS 5
 static int winDelete(
   sqlite3_vfs *pVfs,          /* Not used on win32 */
   const char *zFilename,      /* Name of file to delete */
   int syncDir                 /* Not used on win32 */
 ){
   int cnt = 0;
-  DWORD rc;
-  DWORD error = 0;
+  int rc;
   void *zConverted;
   UNUSED_PARAMETER(pVfs);
   UNUSED_PARAMETER(syncDir);
@@ -2335,34 +2689,30 @@ static int winDelete(
     return SQLITE_NOMEM;
   }
   if( isNT() ){
-    do{
-      DeleteFileW(zConverted);
-    }while(   (   ((rc = GetFileAttributesW(zConverted)) != INVALID_FILE_ATTRIBUTES)
-               || ((error = GetLastError()) == ERROR_ACCESS_DENIED))
-           && (++cnt < MX_DELETION_ATTEMPTS)
-           && (Sleep(100), 1) );
+    rc = 1;
+    while( GetFileAttributesW(zConverted)!=INVALID_FILE_ATTRIBUTES &&
+           (rc = DeleteFileW(zConverted))==0 && retryIoerr(&cnt) ){}
+    rc = rc ? SQLITE_OK : SQLITE_ERROR;
 /* isNT() is 1 if SQLITE_OS_WINCE==1, so this else is never executed. 
 ** Since the ASCII version of these Windows API do not exist for WINCE,
 ** it's important to not reference them for WINCE builds.
 */
 #if SQLITE_OS_WINCE==0
   }else{
-    do{
-      DeleteFileA(zConverted);
-    }while(   (   ((rc = GetFileAttributesA(zConverted)) != INVALID_FILE_ATTRIBUTES)
-               || ((error = GetLastError()) == ERROR_ACCESS_DENIED))
-           && (++cnt < MX_DELETION_ATTEMPTS)
-           && (Sleep(100), 1) );
+    rc = 1;
+    while( GetFileAttributesA(zConverted)!=INVALID_FILE_ATTRIBUTES &&
+           (rc = DeleteFileA(zConverted))==0 && retryIoerr(&cnt) ){}
+    rc = rc ? SQLITE_OK : SQLITE_ERROR;
 #endif
   }
+  if( rc ){
+    rc = winLogError(SQLITE_IOERR_DELETE, "winDelete", zFilename);
+  }else{
+    logIoerr(cnt);
+  }
   free(zConverted);
-  OSTRACE(("DELETE \"%s\" %s\n", zFilename,
-       ( (rc==INVALID_FILE_ATTRIBUTES) && (error==ERROR_FILE_NOT_FOUND)) ?
-         "ok" : "failed" ));
- 
-  return (   (rc == INVALID_FILE_ATTRIBUTES) 
-          && (error == ERROR_FILE_NOT_FOUND)) ? SQLITE_OK :
-                 winLogError(SQLITE_IOERR_DELETE, "winDelete", zFilename);
+  OSTRACE(("DELETE \"%s\" %s\n", zFilename, (rc ? "failed" : "ok" )));
+  return rc;
 }
 
 /*
@@ -2385,11 +2735,13 @@ static int winAccess(
     return SQLITE_NOMEM;
   }
   if( isNT() ){
+    int cnt = 0;
     WIN32_FILE_ATTRIBUTE_DATA sAttrData;
     memset(&sAttrData, 0, sizeof(sAttrData));
-    if( GetFileAttributesExW((WCHAR*)zConverted,
+    while( !(rc = GetFileAttributesExW((WCHAR*)zConverted,
                              GetFileExInfoStandard, 
-                             &sAttrData) ){
+                             &sAttrData)) && retryIoerr(&cnt) ){}
+    if( rc ){
       /* For an SQLITE_ACCESS_EXISTS query, treat a zero-length file
       ** as if it does not exist.
       */
@@ -2401,6 +2753,7 @@ static int winAccess(
         attr = sAttrData.dwFileAttributes;
       }
     }else{
+      logIoerr(cnt);
       if( GetLastError()!=ERROR_FILE_NOT_FOUND ){
         winLogError(SQLITE_IOERR_ACCESS, "winAccess", zFilename);
         free(zConverted);
@@ -2425,7 +2778,8 @@ static int winAccess(
       rc = attr!=INVALID_FILE_ATTRIBUTES;
       break;
     case SQLITE_ACCESS_READWRITE:
-      rc = (attr & FILE_ATTRIBUTE_READONLY)==0;
+      rc = attr!=INVALID_FILE_ATTRIBUTES &&
+             (attr & FILE_ATTRIBUTE_READONLY)==0;
       break;
     default:
       assert(!"Invalid flags argument");
@@ -2627,7 +2981,7 @@ static void winDlError(sqlite3_vfs *pVfs, int nBuf, char *zBufOut){
   UNUSED_PARAMETER(pVfs);
   getLastErrorMsg(nBuf, zBufOut);
 }
-void (*winDlSym(sqlite3_vfs *pVfs, void *pHandle, const char *zSymbol))(void){
+static void (*winDlSym(sqlite3_vfs *pVfs, void *pHandle, const char *zSymbol))(void){
   UNUSED_PARAMETER(pVfs);
 #if SQLITE_OS_WINCE
   /* The GetProcAddressA() routine is only available on wince. */
@@ -2638,7 +2992,7 @@ void (*winDlSym(sqlite3_vfs *pVfs, void *pHandle, const char *zSymbol))(void){
   return (void(*)(void))GetProcAddress((HANDLE)pHandle, zSymbol);
 #endif
 }
-void winDlClose(sqlite3_vfs *pVfs, void *pHandle){
+static void winDlClose(sqlite3_vfs *pVfs, void *pHandle){
   UNUSED_PARAMETER(pVfs);
   FreeLibrary((HANDLE)pHandle);
 }
@@ -2712,7 +3066,8 @@ int sqlite3_current_time = 0;  /* Fake system time in seconds since 1970. */
 ** epoch of noon in Greenwich on November 24, 4714 B.C according to the
 ** proleptic Gregorian calendar.
 **
-** On success, return 0.  Return 1 if the time and date cannot be found.
+** On success, return SQLITE_OK.  Return SQLITE_ERROR if the time and date 
+** cannot be found.
 */
 static int winCurrentTimeInt64(sqlite3_vfs *pVfs, sqlite3_int64 *piNow){
   /* FILETIME structure is a 64-bit value representing the number of 
@@ -2732,7 +3087,7 @@ static int winCurrentTimeInt64(sqlite3_vfs *pVfs, sqlite3_int64 *piNow){
   GetSystemTime(&time);
   /* if SystemTimeToFileTime() fails, it returns zero. */
   if (!SystemTimeToFileTime(&time,&ft)){
-    return 1;
+    return SQLITE_ERROR;
   }
 #else
   GetSystemTimeAsFileTime( &ft );
@@ -2748,7 +3103,7 @@ static int winCurrentTimeInt64(sqlite3_vfs *pVfs, sqlite3_int64 *piNow){
   }
 #endif
   UNUSED_PARAMETER(pVfs);
-  return 0;
+  return SQLITE_OK;
 }
 
 /*
@@ -2756,7 +3111,7 @@ static int winCurrentTimeInt64(sqlite3_vfs *pVfs, sqlite3_int64 *piNow){
 ** current time and date as a Julian Day number into *prNow and
 ** return 0.  Return 1 if the time and date cannot be found.
 */
-int winCurrentTime(sqlite3_vfs *pVfs, double *prNow){
+static int winCurrentTime(sqlite3_vfs *pVfs, double *prNow){
   int rc;
   sqlite3_int64 i;
   rc = winCurrentTimeInt64(pVfs, &i);
diff --git a/src/pager.c b/src/pager.c
index fd74ea4f..ad6f8310 100644
--- a/src/pager.c
+++ b/src/pager.c
@@ -670,8 +670,8 @@ struct Pager {
   char *zJournal;             /* Name of the journal file */
   int (*xBusyHandler)(void*); /* Function to call when busy */
   void *pBusyHandlerArg;      /* Context argument for xBusyHandler */
+  int nHit, nMiss;            /* Total cache hits and misses */
 #ifdef SQLITE_TEST
-  int nHit, nMiss;            /* Cache hits and missing */
   int nRead, nWrite;          /* Database pages read/written */
 #endif
   void (*xReiniter)(DbPage*); /* Call this routine when reloading pages */
@@ -2703,7 +2703,6 @@ static int pager_playback(Pager *pPager, int isHot){
       rc = pager_playback_one_page(pPager,&pPager->journalOff,0,1,0);
       if( rc!=SQLITE_OK ){
         if( rc==SQLITE_DONE ){
-          rc = SQLITE_OK;
           pPager->journalOff = szJ;
           break;
         }else if( rc==SQLITE_IOERR_SHORT_READ ){
@@ -2965,6 +2964,7 @@ static int pagerWalFrames(
 #endif
 
   assert( pPager->pWal );
+  assert( pList );
 #ifdef SQLITE_DEBUG
   /* Verify that the page list is in accending order */
   for(p=pList; p && p->pDirty; p=p->pDirty){
@@ -3739,6 +3739,7 @@ static int pagerSyncHotJournal(Pager *pPager){
 int sqlite3PagerClose(Pager *pPager){
   u8 *pTmp = (u8 *)pPager->pTmpSpace;
 
+  assert( assert_pager_state(pPager) );
   disable_simulated_io_errors();
   sqlite3BeginBenignMalloc();
   /* pPager->errCode = 0; */
@@ -4168,7 +4169,7 @@ static int pagerStress(void *p, PgHdr *pPg){
   **
   ** Spilling is also prohibited when in an error state since that could
   ** lead to database corruption.   In the current implementaton it 
-  ** is impossible for sqlite3PCacheFetch() to be called with createFlag==1
+  ** is impossible for sqlite3PcacheFetch() to be called with createFlag==1
   ** while in the error state, hence it is impossible for this routine to
   ** be called in the error state.  Nevertheless, we include a NEVER()
   ** test for the error state as a safeguard against future changes.
@@ -5004,14 +5005,13 @@ int sqlite3PagerAcquire(
     /* In this case the pcache already contains an initialized copy of
     ** the page. Return without further ado.  */
     assert( pgno<=PAGER_MAX_PGNO && pgno!=PAGER_MJ_PGNO(pPager) );
-    PAGER_INCR(pPager->nHit);
+    pPager->nHit++;
     return SQLITE_OK;
 
   }else{
     /* The pager cache has created a new page. Its content needs to 
     ** be initialized.  */
 
-    PAGER_INCR(pPager->nMiss);
     pPg = *ppPage;
     pPg->pPager = pPager;
 
@@ -5047,6 +5047,7 @@ int sqlite3PagerAcquire(
       IOTRACE(("ZERO %p %d\n", pPager, pgno));
     }else{
       assert( pPg->pPager==pPager );
+      pPager->nMiss++;
       rc = readDbPage(pPg);
       if( rc!=SQLITE_OK ){
         goto pager_acquire_err;
@@ -6081,6 +6082,31 @@ int *sqlite3PagerStats(Pager *pPager){
 }
 #endif
 
+/*
+** Parameter eStat must be either SQLITE_DBSTATUS_CACHE_HIT or
+** SQLITE_DBSTATUS_CACHE_MISS. Before returning, *pnVal is incremented by the
+** current cache hit or miss count, according to the value of eStat. If the 
+** reset parameter is non-zero, the cache hit or miss count is zeroed before 
+** returning.
+*/
+void sqlite3PagerCacheStat(Pager *pPager, int eStat, int reset, int *pnVal){
+  int *piStat;
+
+  assert( eStat==SQLITE_DBSTATUS_CACHE_HIT
+       || eStat==SQLITE_DBSTATUS_CACHE_MISS
+  );
+  if( eStat==SQLITE_DBSTATUS_CACHE_HIT ){
+    piStat = &pPager->nHit;
+  }else{
+    piStat = &pPager->nMiss;
+  }
+
+  *pnVal += *piStat;
+  if( reset ){
+    *piStat = 0;
+  }
+}
+
 /*
 ** Return true if this is an in-memory pager.
 */
@@ -6810,6 +6836,13 @@ int sqlite3PagerCloseWal(Pager *pPager){
   return rc;
 }
 
+/*
+** Unless this is an in-memory or temporary database, clear the pager cache.
+*/
+void sqlite3PagerClearCache(Pager *pPager){
+  if( !MEMDB && pPager->tempFile==0 ) pager_reset(pPager);
+}
+
 #ifdef SQLITE_HAS_CODEC
 /*
 ** This function is called by the wal module when writing page content
diff --git a/src/pager.h b/src/pager.h
index eab7ddaf..e36e6c2e 100644
--- a/src/pager.h
+++ b/src/pager.h
@@ -155,6 +155,8 @@ const char *sqlite3PagerJournalname(Pager*);
 int sqlite3PagerNosync(Pager*);
 void *sqlite3PagerTempSpace(Pager*);
 int sqlite3PagerIsMemdb(Pager*);
+void sqlite3PagerCacheStat(Pager *, int, int, int *);
+void sqlite3PagerClearCache(Pager *);
 
 /* Functions used to truncate the database file. */
 void sqlite3PagerTruncateImage(Pager*,Pgno);
diff --git a/src/pcache1.c b/src/pcache1.c
index e47265a2..077a7b21 100644
--- a/src/pcache1.c
+++ b/src/pcache1.c
@@ -24,6 +24,7 @@ typedef struct PgHdr1 PgHdr1;
 typedef struct PgFreeslot PgFreeslot;
 typedef struct PGroup PGroup;
 
+
 /* Each page cache (or PCache) belongs to a PGroup.  A PGroup is a set 
 ** of one or more PCaches that are able to recycle each others unpinned
 ** pages when they are under memory pressure.  A PGroup is an instance of
@@ -288,15 +289,22 @@ static int pcache1MemSize(void *p){
 */
 static PgHdr1 *pcache1AllocPage(PCache1 *pCache){
   int nByte = sizeof(PgHdr1) + pCache->szPage;
-  void *pPg = pcache1Alloc(nByte);
-  PgHdr1 *p;
+  PgHdr1 *p = 0;
+  void *pPg;
+
+  /* The group mutex must be released before pcache1Alloc() is called. This
+  ** is because it may call sqlite3_release_memory(), which assumes that 
+  ** this mutex is not held. */
+  assert( sqlite3_mutex_held(pCache->pGroup->mutex) );
+  pcache1LeaveMutex(pCache->pGroup);
+  pPg = pcache1Alloc(nByte);
+  pcache1EnterMutex(pCache->pGroup);
+
   if( pPg ){
     p = PAGE_TO_PGHDR1(pCache, pPg);
     if( pCache->bPurgeable ){
       pCache->pGroup->nCurrentPage++;
     }
-  }else{
-    p = 0;
   }
   return p;
 }
@@ -311,10 +319,11 @@ static PgHdr1 *pcache1AllocPage(PCache1 *pCache){
 static void pcache1FreePage(PgHdr1 *p){
   if( ALWAYS(p) ){
     PCache1 *pCache = p->pCache;
+    assert( sqlite3_mutex_held(p->pCache->pGroup->mutex) );
+    pcache1Free(PGHDR1_TO_PAGE(p));
     if( pCache->bPurgeable ){
       pCache->pGroup->nCurrentPage--;
     }
-    pcache1Free(PGHDR1_TO_PAGE(p));
   }
 }
 
@@ -752,9 +761,7 @@ static void *pcache1Fetch(sqlite3_pcache *p, unsigned int iKey, int createFlag){
   */
   if( !pPage ){
     if( createFlag==1 ) sqlite3BeginBenignMalloc();
-    pcache1LeaveMutex(pGroup);
     pPage = pcache1AllocPage(pCache);
-    pcache1EnterMutex(pGroup);
     if( createFlag==1 ) sqlite3EndBenignMalloc();
   }
 
diff --git a/src/pragma.c b/src/pragma.c
index dd6e059d..7c20a89e 100644
--- a/src/pragma.c
+++ b/src/pragma.c
@@ -467,7 +467,7 @@ void sqlite3Pragma(
     if( sqlite3ReadSchema(pParse) ) goto pragma_out;
     sqlite3CodeVerifySchema(pParse, iDb);
     iReg = ++pParse->nMem;
-    if( zLeft[0]=='p' ){
+    if( sqlite3Tolower(zLeft[0])=='p' ){
       sqlite3VdbeAddOp2(v, OP_Pagecount, iDb, iReg);
     }else{
       sqlite3VdbeAddOp3(v, OP_MaxPgcnt, iDb, iReg, sqlite3Atoi(zRight));
@@ -533,8 +533,10 @@ void sqlite3Pragma(
     int eMode;        /* One of the PAGER_JOURNALMODE_XXX symbols */
     int ii;           /* Loop counter */
 
-    /* Force the schema to be loaded on all databases.  This cases all
-    ** database files to be opened and the journal_modes set. */
+    /* Force the schema to be loaded on all databases.  This causes all
+    ** database files to be opened and the journal_modes set.  This is
+    ** necessary because subsequent processing must know if the databases
+    ** are in WAL mode. */
     if( sqlite3ReadSchema(pParse) ){
       goto pragma_out;
     }
@@ -1078,7 +1080,7 @@ void sqlite3Pragma(
       { OP_ResultRow,   3, 1,        0},
     };
 
-    int isQuick = (zLeft[0]=='q');
+    int isQuick = (sqlite3Tolower(zLeft[0])=='q');
 
     /* Initialize the VDBE program */
     if( sqlite3ReadSchema(pParse) ) goto pragma_out;
diff --git a/src/printf.c b/src/printf.c
index 2a3dd81d..0babee51 100644
--- a/src/printf.c
+++ b/src/printf.c
@@ -7,48 +7,10 @@
 **
 **************************************************************************
 **
-** The following modules is an enhanced replacement for the "printf" subroutines
-** found in the standard C library.  The following enhancements are
-** supported:
-**
-**      +  Additional functions.  The standard set of "printf" functions
-**         includes printf, fprintf, sprintf, vprintf, vfprintf, and
-**         vsprintf.  This module adds the following:
-**
-**           *  snprintf -- Works like sprintf, but has an extra argument
-**                          which is the size of the buffer written to.
-**
-**           *  mprintf --  Similar to sprintf.  Writes output to memory
-**                          obtained from malloc.
-**
-**           *  xprintf --  Calls a function to dispose of output.
-**
-**           *  nprintf --  No output, but returns the number of characters
-**                          that would have been output by printf.
-**
-**           *  A v- version (ex: vsnprintf) of every function is also
-**              supplied.
-**
-**      +  A few extensions to the formatting notation are supported:
-**
-**           *  The "=" flag (similar to "-") causes the output to be
-**              be centered in the appropriately sized field.
-**
-**           *  The %b field outputs an integer in binary notation.
-**
-**           *  The %c field now accepts a precision.  The character output
-**              is repeated by the number of times the precision specifies.
-**
-**           *  The %' field works like %c, but takes as its character the
-**              next character of the format string, instead of the next
-**              argument.  For example,  printf("%.78'-")  prints 78 minus
-**              signs, the same as  printf("%.78c",'-').
-**
-**      +  When compiled using GCC on a SPARC, this version of printf is
-**         faster than the library printf for SUN OS 4.1.
-**
-**      +  All functions are fully reentrant.
-**
+** This file contains code for a set of "printf"-like routines.  These
+** routines format strings much like the printf() from the standard C
+** library, though the implementation here has enhancements to support
+** SQLlite.
 */
 #include "sqliteInt.h"
 
@@ -187,43 +149,15 @@ static void appendSpace(StrAccum *pAccum, int N){
 
 /*
 ** On machines with a small stack size, you can redefine the
-** SQLITE_PRINT_BUF_SIZE to be less than 350.
+** SQLITE_PRINT_BUF_SIZE to be something smaller, if desired.
 */
 #ifndef SQLITE_PRINT_BUF_SIZE
-# if defined(SQLITE_SMALL_STACK)
-#   define SQLITE_PRINT_BUF_SIZE 50
-# else
-#   define SQLITE_PRINT_BUF_SIZE 350
-# endif
+# define SQLITE_PRINT_BUF_SIZE 70
 #endif
 #define etBUFSIZE SQLITE_PRINT_BUF_SIZE  /* Size of the output buffer */
 
 /*
-** The root program.  All variations call this core.
-**
-** INPUTS:
-**   func   This is a pointer to a function taking three arguments
-**            1. A pointer to anything.  Same as the "arg" parameter.
-**            2. A pointer to the list of characters to be output
-**               (Note, this list is NOT null terminated.)
-**            3. An integer number of characters to be output.
-**               (Note: This number might be zero.)
-**
-**   arg    This is the pointer to anything which will be passed as the
-**          first argument to "func".  Use it for whatever you like.
-**
-**   fmt    This is the format string, as in the usual print.
-**
-**   ap     This is a pointer to a list of arguments.  Same as in
-**          vfprint.
-**
-** OUTPUTS:
-**          The return value is the total number of characters sent to
-**          the function "func".  Returns -1 on a error.
-**
-** Note that the order in which automatic variables are declared below
-** seems to make a big difference in determining how fast this beast
-** will run.
+** Render a string given by "fmt" into the StrAccum object.
 */
 void sqlite3VXPrintf(
   StrAccum *pAccum,                  /* Accumulate results here */
@@ -246,23 +180,23 @@ void sqlite3VXPrintf(
   etByte flag_long;          /* True if "l" flag is present */
   etByte flag_longlong;      /* True if the "ll" flag is present */
   etByte done;               /* Loop termination flag */
+  etByte xtype = 0;          /* Conversion paradigm */
+  char prefix;               /* Prefix character.  "+" or "-" or " " or '\0'. */
   sqlite_uint64 longvalue;   /* Value for integer types */
   LONGDOUBLE_TYPE realvalue; /* Value for real types */
   const et_info *infop;      /* Pointer to the appropriate info structure */
-  char buf[etBUFSIZE];       /* Conversion buffer */
-  char prefix;               /* Prefix character.  "+" or "-" or " " or '\0'. */
-  etByte xtype = 0;          /* Conversion paradigm */
-  char *zExtra;              /* Extra memory used for etTCLESCAPE conversions */
+  char *zOut;                /* Rendering buffer */
+  int nOut;                  /* Size of the rendering buffer */
+  char *zExtra;              /* Malloced memory used by some conversion */
 #ifndef SQLITE_OMIT_FLOATING_POINT
   int  exp, e2;              /* exponent of real numbers */
+  int nsd;                   /* Number of significant digits returned */
   double rounder;            /* Used for rounding floating point values */
   etByte flag_dp;            /* True if decimal point should be shown */
   etByte flag_rtz;           /* True if trailing zeros should be removed */
-  etByte flag_exp;           /* True to force display of the exponent */
-  int nsd;                   /* Number of significant digits returned */
 #endif
+  char buf[etBUFSIZE];       /* Conversion buffer */
 
-  length = 0;
   bufpt = 0;
   for(; (c=(*fmt))!=0; ++fmt){
     if( c!='%' ){
@@ -307,9 +241,6 @@ void sqlite3VXPrintf(
         c = *++fmt;
       }
     }
-    if( width > etBUFSIZE-10 ){
-      width = etBUFSIZE-10;
-    }
     /* Get the precision */
     if( c=='.' ){
       precision = 0;
@@ -356,12 +287,6 @@ void sqlite3VXPrintf(
     }
     zExtra = 0;
 
-
-    /* Limit the precision to prevent overflowing buf[] during conversion */
-    if( precision>etBUFSIZE-40 && (infop->flags & FLAG_STRING)==0 ){
-      precision = etBUFSIZE-40;
-    }
-
     /*
     ** At this point, variables are initialized as follows:
     **
@@ -426,16 +351,26 @@ void sqlite3VXPrintf(
         if( flag_zeropad && precision<width-(prefix!=0) ){
           precision = width-(prefix!=0);
         }
-        bufpt = &buf[etBUFSIZE-1];
+        if( precision<etBUFSIZE-10 ){
+          nOut = etBUFSIZE;
+          zOut = buf;
+        }else{
+          nOut = precision + 10;
+          zOut = zExtra = sqlite3Malloc( nOut );
+          if( zOut==0 ){
+            pAccum->mallocFailed = 1;
+            return;
+          }
+        }
+        bufpt = &zOut[nOut-1];
         if( xtype==etORDINAL ){
           static const char zOrd[] = "thstndrd";
           int x = (int)(longvalue % 10);
           if( x>=4 || (longvalue/10)%10==1 ){
             x = 0;
           }
-          buf[etBUFSIZE-3] = zOrd[x*2];
-          buf[etBUFSIZE-2] = zOrd[x*2+1];
-          bufpt -= 2;
+          *(--bufpt) = zOrd[x*2+1];
+          *(--bufpt) = zOrd[x*2];
         }
         {
           register const char *cset;      /* Use registers for speed */
@@ -447,7 +382,7 @@ void sqlite3VXPrintf(
             longvalue = longvalue/base;
           }while( longvalue>0 );
         }
-        length = (int)(&buf[etBUFSIZE-1]-bufpt);
+        length = (int)(&zOut[nOut-1]-bufpt);
         for(idx=precision-length; idx>0; idx--){
           *(--bufpt) = '0';                             /* Zero pad */
         }
@@ -458,7 +393,7 @@ void sqlite3VXPrintf(
           pre = &aPrefix[infop->prefix];
           for(; (x=(*pre))!=0; pre++) *(--bufpt) = x;
         }
-        length = (int)(&buf[etBUFSIZE-1]-bufpt);
+        length = (int)(&zOut[nOut-1]-bufpt);
         break;
       case etFLOAT:
       case etEXP:
@@ -468,7 +403,6 @@ void sqlite3VXPrintf(
         length = 0;
 #else
         if( precision<0 ) precision = 6;         /* Set default precision */
-        if( precision>etBUFSIZE/2-10 ) precision = etBUFSIZE/2-10;
         if( realvalue<0.0 ){
           realvalue = -realvalue;
           prefix = '-';
@@ -516,7 +450,6 @@ void sqlite3VXPrintf(
         ** If the field type is etGENERIC, then convert to either etEXP
         ** or etFLOAT, as appropriate.
         */
-        flag_exp = xtype==etEXP;
         if( xtype!=etFLOAT ){
           realvalue += rounder;
           if( realvalue>=10.0 ){ realvalue *= 0.1; exp++; }
@@ -537,6 +470,14 @@ void sqlite3VXPrintf(
         }else{
           e2 = exp;
         }
+        if( e2+precision+width > etBUFSIZE - 15 ){
+          bufpt = zExtra = sqlite3Malloc( e2+precision+width+15 );
+          if( bufpt==0 ){
+            pAccum->mallocFailed = 1;
+            return;
+          }
+        }
+        zOut = bufpt;
         nsd = 0;
         flag_dp = (precision>0 ?1:0) | flag_alternateform | flag_altform2;
         /* The sign in front of the number */
@@ -568,7 +509,7 @@ void sqlite3VXPrintf(
         /* Remove trailing zeros and the "." if no digits follow the "." */
         if( flag_rtz && flag_dp ){
           while( bufpt[-1]=='0' ) *(--bufpt) = 0;
-          assert( bufpt>buf );
+          assert( bufpt>zOut );
           if( bufpt[-1]=='.' ){
             if( flag_altform2 ){
               *(bufpt++) = '0';
@@ -578,7 +519,7 @@ void sqlite3VXPrintf(
           }
         }
         /* Add the "eNNN" suffix */
-        if( flag_exp || xtype==etEXP ){
+        if( xtype==etEXP ){
           *(bufpt++) = aDigits[infop->charset];
           if( exp<0 ){
             *(bufpt++) = '-'; exp = -exp;
@@ -597,8 +538,8 @@ void sqlite3VXPrintf(
         /* The converted number is in buf[] and zero terminated. Output it.
         ** Note that the number is in the usual order, not reversed as with
         ** integer conversions. */
-        length = (int)(bufpt-buf);
-        bufpt = buf;
+        length = (int)(bufpt-zOut);
+        bufpt = zOut;
 
         /* Special case:  Add leading zeros if the flag_zeropad flag is
         ** set and we are not left justified */
@@ -736,9 +677,7 @@ void sqlite3VXPrintf(
         appendSpace(pAccum, nspace);
       }
     }
-    if( zExtra ){
-      sqlite3_free(zExtra);
-    }
+    sqlite3_free(zExtra);
   }/* End for loop over the format string */
 } /* End of function */
 
@@ -752,6 +691,7 @@ void sqlite3StrAccumAppend(StrAccum *p, const char *z, int N){
     testcase(p->mallocFailed);
     return;
   }
+  assert( p->zText!=0 || p->nChar==0 );
   if( N<0 ){
     N = sqlite3Strlen30(z);
   }
@@ -783,7 +723,7 @@ void sqlite3StrAccumAppend(StrAccum *p, const char *z, int N){
         zNew = sqlite3_realloc(zOld, p->nAlloc);
       }
       if( zNew ){
-        if( zOld==0 ) memcpy(zNew, p->zText, p->nChar);
+        if( zOld==0 && p->nChar>0 ) memcpy(zNew, p->zText, p->nChar);
         p->zText = zNew;
       }else{
         p->mallocFailed = 1;
@@ -792,6 +732,7 @@ void sqlite3StrAccumAppend(StrAccum *p, const char *z, int N){
       }
     }
   }
+  assert( p->zText );
   memcpy(&p->zText[p->nChar], z, N);
   p->nChar += N;
 }
diff --git a/src/resolve.c b/src/resolve.c
index 74d6aaef..6d857f00 100644
--- a/src/resolve.c
+++ b/src/resolve.c
@@ -98,6 +98,24 @@ static void resolveAlias(
   sqlite3DbFree(db, pDup);
 }
 
+
+/*
+** Return TRUE if the name zCol occurs anywhere in the USING clause.
+**
+** Return FALSE if the USING clause is NULL or if it does not contain
+** zCol.
+*/
+static int nameInUsingClause(IdList *pUsing, const char *zCol){
+  if( pUsing ){
+    int k;
+    for(k=0; k<pUsing->nId; k++){
+      if( sqlite3StrICmp(pUsing->a[k].zName, zCol)==0 ) return 1;
+    }
+  }
+  return 0;
+}
+
+
 /*
 ** Given the name of a column of the form X.Y.Z or Y.Z or just Z, look up
 ** that name in the set of source tables in pSrcList and make the pExpr 
@@ -189,7 +207,14 @@ static int lookupName(
         }
         for(j=0, pCol=pTab->aCol; j<pTab->nCol; j++, pCol++){
           if( sqlite3StrICmp(pCol->zName, zCol)==0 ){
-            IdList *pUsing;
+            /* If there has been exactly one prior match and this match
+            ** is for the right-hand table of a NATURAL JOIN or is in a 
+            ** USING clause, then skip this match.
+            */
+            if( cnt==1 ){
+              if( pItem->jointype & JT_NATURAL ) continue;
+              if( nameInUsingClause(pItem->pUsing, zCol) ) continue;
+            }
             cnt++;
             pExpr->iTable = pItem->iCursor;
             pExpr->pTab = pTab;
@@ -197,26 +222,6 @@ static int lookupName(
             pSchema = pTab->pSchema;
             /* Substitute the rowid (column -1) for the INTEGER PRIMARY KEY */
             pExpr->iColumn = j==pTab->iPKey ? -1 : (i16)j;
-            if( i<pSrcList->nSrc-1 ){
-              if( pItem[1].jointype & JT_NATURAL ){
-                /* If this match occurred in the left table of a natural join,
-                ** then skip the right table to avoid a duplicate match */
-                pItem++;
-                i++;
-              }else if( (pUsing = pItem[1].pUsing)!=0 ){
-                /* If this match occurs on a column that is in the USING clause
-                ** of a join, skip the search of the right table of the join
-                ** to avoid a duplicate match there. */
-                int k;
-                for(k=0; k<pUsing->nId; k++){
-                  if( sqlite3StrICmp(pUsing->a[k].zName, zCol)==0 ){
-                    pItem++;
-                    i++;
-                    break;
-                  }
-                }
-              }
-            }
             break;
           }
         }
@@ -996,11 +1001,25 @@ static int resolveSelectStep(Walker *pWalker, Select *p){
     for(i=0; i<p->pSrc->nSrc; i++){
       struct SrcList_item *pItem = &p->pSrc->a[i];
       if( pItem->pSelect ){
+        NameContext *pNC;         /* Used to iterate name contexts */
+        int nRef = 0;             /* Refcount for pOuterNC and outer contexts */
         const char *zSavedContext = pParse->zAuthContext;
+
+        /* Count the total number of references to pOuterNC and all of its
+        ** parent contexts. After resolving references to expressions in
+        ** pItem->pSelect, check if this value has changed. If so, then
+        ** SELECT statement pItem->pSelect must be correlated. Set the
+        ** pItem->isCorrelated flag if this is the case. */
+        for(pNC=pOuterNC; pNC; pNC=pNC->pNext) nRef += pNC->nRef;
+
         if( pItem->zName ) pParse->zAuthContext = pItem->zName;
         sqlite3ResolveSelectNames(pParse, pItem->pSelect, pOuterNC);
         pParse->zAuthContext = zSavedContext;
         if( pParse->nErr || db->mallocFailed ) return WRC_Abort;
+
+        for(pNC=pOuterNC; pNC; pNC=pNC->pNext) nRef -= pNC->nRef;
+        assert( pItem->isCorrelated==0 && nRef<=0 );
+        pItem->isCorrelated = (nRef!=0);
       }
     }
   
diff --git a/src/select.c b/src/select.c
index 8dcfb84b..571a7782 100644
--- a/src/select.c
+++ b/src/select.c
@@ -65,6 +65,7 @@ Select *sqlite3SelectNew(
   pNew = sqlite3DbMallocZero(db, sizeof(*pNew) );
   assert( db->mallocFailed || !pOffset || pLimit ); /* OFFSET implies LIMIT */
   if( pNew==0 ){
+    assert( db->mallocFailed );
     pNew = &standin;
     memset(pNew, 0, sizeof(*pNew));
   }
@@ -89,7 +90,10 @@ Select *sqlite3SelectNew(
     clearSelect(db, pNew);
     if( pNew!=&standin ) sqlite3DbFree(db, pNew);
     pNew = 0;
+  }else{
+    assert( pNew->pSrc!=0 || pParse->nErr>0 );
   }
+  assert( pNew!=&standin );
   return pNew;
 }
 
@@ -419,12 +423,18 @@ static void pushOntoSorter(
   int nExpr = pOrderBy->nExpr;
   int regBase = sqlite3GetTempRange(pParse, nExpr+2);
   int regRecord = sqlite3GetTempReg(pParse);
+  int op;
   sqlite3ExprCacheClear(pParse);
   sqlite3ExprCodeExprList(pParse, pOrderBy, regBase, 0);
   sqlite3VdbeAddOp2(v, OP_Sequence, pOrderBy->iECursor, regBase+nExpr);
   sqlite3ExprCodeMove(pParse, regData, regBase+nExpr+1, 1);
   sqlite3VdbeAddOp3(v, OP_MakeRecord, regBase, nExpr + 2, regRecord);
-  sqlite3VdbeAddOp2(v, OP_IdxInsert, pOrderBy->iECursor, regRecord);
+  if( pSelect->selFlags & SF_UseSorter ){
+    op = OP_SorterInsert;
+  }else{
+    op = OP_IdxInsert;
+  }
+  sqlite3VdbeAddOp2(v, op, pOrderBy->iECursor, regRecord);
   sqlite3ReleaseTempReg(pParse, regRecord);
   sqlite3ReleaseTempRange(pParse, regBase, nExpr+2);
   if( pSelect->iLimit ){
@@ -893,9 +903,20 @@ static void generateSortTail(
   }else{
     regRowid = sqlite3GetTempReg(pParse);
   }
-  addr = 1 + sqlite3VdbeAddOp2(v, OP_Sort, iTab, addrBreak);
-  codeOffset(v, p, addrContinue);
-  sqlite3VdbeAddOp3(v, OP_Column, iTab, pOrderBy->nExpr + 1, regRow);
+  if( p->selFlags & SF_UseSorter ){
+    int regSortOut = ++pParse->nMem;
+    int ptab2 = pParse->nTab++;
+    sqlite3VdbeAddOp3(v, OP_OpenPseudo, ptab2, regSortOut, pOrderBy->nExpr+2);
+    addr = 1 + sqlite3VdbeAddOp2(v, OP_SorterSort, iTab, addrBreak);
+    codeOffset(v, p, addrContinue);
+    sqlite3VdbeAddOp2(v, OP_SorterData, iTab, regSortOut);
+    sqlite3VdbeAddOp3(v, OP_Column, ptab2, pOrderBy->nExpr+1, regRow);
+    sqlite3VdbeChangeP5(v, OPFLAG_CLEARCACHE);
+  }else{
+    addr = 1 + sqlite3VdbeAddOp2(v, OP_Sort, iTab, addrBreak);
+    codeOffset(v, p, addrContinue);
+    sqlite3VdbeAddOp3(v, OP_Column, iTab, pOrderBy->nExpr+1, regRow);
+  }
   switch( eDest ){
     case SRT_Table:
     case SRT_EphemTab: {
@@ -948,7 +969,11 @@ static void generateSortTail(
   /* The bottom of the loop
   */
   sqlite3VdbeResolveLabel(v, addrContinue);
-  sqlite3VdbeAddOp2(v, OP_Next, iTab, addr);
+  if( p->selFlags & SF_UseSorter ){
+    sqlite3VdbeAddOp2(v, OP_SorterNext, iTab, addr);
+  }else{
+    sqlite3VdbeAddOp2(v, OP_Next, iTab, addr);
+  }
   sqlite3VdbeResolveLabel(v, addrBreak);
   if( eDest==SRT_Output || eDest==SRT_Coroutine ){
     sqlite3VdbeAddOp2(v, OP_Close, pseudoTab, 0);
@@ -1247,7 +1272,10 @@ static int selectColumnsFromExprList(
     }else{
       Expr *pColExpr = p;  /* The expression that is the result column name */
       Table *pTab;         /* Table associated with this expression */
-      while( pColExpr->op==TK_DOT ) pColExpr = pColExpr->pRight;
+      while( pColExpr->op==TK_DOT ){
+        pColExpr = pColExpr->pRight;
+        assert( pColExpr!=0 );
+      }
       if( pColExpr->op==TK_COLUMN && ALWAYS(pColExpr->pTab!=0) ){
         /* For columns use the column name name */
         int iCol = pColExpr->iColumn;
@@ -3721,6 +3749,7 @@ int sqlite3Select(
   int distinct;          /* Table to use for the distinct set */
   int rc = 1;            /* Value to return from this function */
   int addrSortIndex;     /* Address of an OP_OpenEphemeral instruction */
+  int addrDistinctIndex; /* Address of an OP_OpenEphemeral instruction */
   AggInfo sAggInfo;      /* Information used by aggregate queries */
   int iEnd;              /* Address of the end of the query */
   sqlite3 *db;           /* The database connection */
@@ -3779,7 +3808,11 @@ int sqlite3Select(
     Select *pSub = pItem->pSelect;
     int isAggSub;
 
-    if( pSub==0 || pItem->isPopulated ) continue;
+    if( pSub==0 ) continue;
+    if( pItem->addrFillSub ){
+      sqlite3VdbeAddOp2(v, OP_Gosub, pItem->regReturn, pItem->addrFillSub);
+      continue;
+    }
 
     /* Increment Parse.nHeight by the height of the largest expression
     ** tree refered to by this, the parent select. The child select
@@ -3790,21 +3823,44 @@ int sqlite3Select(
     */
     pParse->nHeight += sqlite3SelectExprHeight(p);
 
-    /* Check to see if the subquery can be absorbed into the parent. */
     isAggSub = (pSub->selFlags & SF_Aggregate)!=0;
     if( flattenSubquery(pParse, p, i, isAgg, isAggSub) ){
+      /* This subquery can be absorbed into its parent. */
       if( isAggSub ){
         isAgg = 1;
         p->selFlags |= SF_Aggregate;
       }
       i = -1;
     }else{
+      /* Generate a subroutine that will fill an ephemeral table with
+      ** the content of this subquery.  pItem->addrFillSub will point
+      ** to the address of the generated subroutine.  pItem->regReturn
+      ** is a register allocated to hold the subroutine return address
+      */
+      int topAddr;
+      int onceAddr = 0;
+      int retAddr;
+      assert( pItem->addrFillSub==0 );
+      pItem->regReturn = ++pParse->nMem;
+      topAddr = sqlite3VdbeAddOp2(v, OP_Integer, 0, pItem->regReturn);
+      pItem->addrFillSub = topAddr+1;
+      VdbeNoopComment((v, "materialize %s", pItem->pTab->zName));
+      if( pItem->isCorrelated==0 && pParse->pTriggerTab==0 ){
+        /* If the subquery is no correlated and if we are not inside of
+        ** a trigger, then we only need to compute the value of the subquery
+        ** once. */
+        int regOnce = ++pParse->nMem;
+        onceAddr = sqlite3VdbeAddOp1(v, OP_Once, regOnce);
+      }
       sqlite3SelectDestInit(&dest, SRT_EphemTab, pItem->iCursor);
-      assert( pItem->isPopulated==0 );
       explainSetInteger(pItem->iSelectId, (u8)pParse->iNextSelectId);
       sqlite3Select(pParse, pSub, &dest);
-      pItem->isPopulated = 1;
       pItem->pTab->nRowEst = (unsigned)pSub->nSelectRow;
+      if( onceAddr ) sqlite3VdbeJumpHere(v, onceAddr);
+      retAddr = sqlite3VdbeAddOp1(v, OP_Return, pItem->regReturn);
+      VdbeComment((v, "end %s", pItem->pTab->zName));
+      sqlite3VdbeChangeP1(v, topAddr, retAddr);
+
     }
     if( /*pParse->nErr ||*/ db->mallocFailed ){
       goto select_end;
@@ -3847,16 +3903,6 @@ int sqlite3Select(
   }
 #endif
 
-  /* If possible, rewrite the query to use GROUP BY instead of DISTINCT.
-  ** GROUP BY might use an index, DISTINCT never does.
-  */
-  assert( p->pGroupBy==0 || (p->selFlags & SF_Aggregate)!=0 );
-  if( (p->selFlags & (SF_Distinct|SF_Aggregate))==SF_Distinct ){
-    p->pGroupBy = sqlite3ExprListDup(db, p->pEList, 0);
-    pGroupBy = p->pGroupBy;
-    p->selFlags &= ~SF_Distinct;
-  }
-
   /* If there is both a GROUP BY and an ORDER BY clause and they are
   ** identical, then disable the ORDER BY clause since the GROUP BY
   ** will cause elements to come out in the correct order.  This is
@@ -3869,6 +3915,30 @@ int sqlite3Select(
     pOrderBy = 0;
   }
 
+  /* If the query is DISTINCT with an ORDER BY but is not an aggregate, and 
+  ** if the select-list is the same as the ORDER BY list, then this query
+  ** can be rewritten as a GROUP BY. In other words, this:
+  **
+  **     SELECT DISTINCT xyz FROM ... ORDER BY xyz
+  **
+  ** is transformed to:
+  **
+  **     SELECT xyz FROM ... GROUP BY xyz
+  **
+  ** The second form is preferred as a single index (or temp-table) may be 
+  ** used for both the ORDER BY and DISTINCT processing. As originally 
+  ** written the query must use a temp-table for at least one of the ORDER 
+  ** BY and DISTINCT, and an index or separate temp-table for the other.
+  */
+  if( (p->selFlags & (SF_Distinct|SF_Aggregate))==SF_Distinct 
+   && sqlite3ExprListCompare(pOrderBy, p->pEList)==0
+  ){
+    p->selFlags &= ~SF_Distinct;
+    p->pGroupBy = sqlite3ExprListDup(db, p->pEList, 0);
+    pGroupBy = p->pGroupBy;
+    pOrderBy = 0;
+  }
+
   /* If there is an ORDER BY clause, then this sorting
   ** index might end up being unused if the data can be 
   ** extracted in pre-sorted order.  If that is the case, then the
@@ -3899,27 +3969,30 @@ int sqlite3Select(
   iEnd = sqlite3VdbeMakeLabel(v);
   p->nSelectRow = (double)LARGEST_INT64;
   computeLimitRegisters(pParse, p, iEnd);
+  if( p->iLimit==0 && addrSortIndex>=0 ){
+    sqlite3VdbeGetOp(v, addrSortIndex)->opcode = OP_SorterOpen;
+    p->selFlags |= SF_UseSorter;
+  }
 
   /* Open a virtual index to use for the distinct set.
   */
   if( p->selFlags & SF_Distinct ){
     KeyInfo *pKeyInfo;
-    assert( isAgg || pGroupBy );
     distinct = pParse->nTab++;
     pKeyInfo = keyInfoFromExprList(pParse, p->pEList);
-    sqlite3VdbeAddOp4(v, OP_OpenEphemeral, distinct, 0, 0,
-                        (char*)pKeyInfo, P4_KEYINFO_HANDOFF);
+    addrDistinctIndex = sqlite3VdbeAddOp4(v, OP_OpenEphemeral, distinct, 0, 0,
+        (char*)pKeyInfo, P4_KEYINFO_HANDOFF);
     sqlite3VdbeChangeP5(v, BTREE_UNORDERED);
   }else{
-    distinct = -1;
+    distinct = addrDistinctIndex = -1;
   }
 
   /* Aggregate and non-aggregate queries are handled differently */
   if( !isAgg && pGroupBy==0 ){
-    /* This case is for non-aggregate queries
-    ** Begin the database scan
-    */
-    pWInfo = sqlite3WhereBegin(pParse, pTabList, pWhere, &pOrderBy, 0);
+    ExprList *pDist = (isDistinct ? p->pEList : 0);
+
+    /* Begin the database scan. */
+    pWInfo = sqlite3WhereBegin(pParse, pTabList, pWhere, &pOrderBy, pDist, 0);
     if( pWInfo==0 ) goto select_end;
     if( pWInfo->nRowOut < p->nSelectRow ) p->nSelectRow = pWInfo->nRowOut;
 
@@ -3928,14 +4001,56 @@ int sqlite3Select(
     ** into an OP_Noop.
     */
     if( addrSortIndex>=0 && pOrderBy==0 ){
-      sqlite3VdbeChangeToNoop(v, addrSortIndex, 1);
+      sqlite3VdbeChangeToNoop(v, addrSortIndex);
       p->addrOpenEphm[2] = -1;
     }
 
-    /* Use the standard inner loop
-    */
-    assert(!isDistinct);
-    selectInnerLoop(pParse, p, pEList, 0, 0, pOrderBy, -1, pDest,
+    if( pWInfo->eDistinct ){
+      VdbeOp *pOp;                /* No longer required OpenEphemeral instr. */
+     
+      assert( addrDistinctIndex>=0 );
+      pOp = sqlite3VdbeGetOp(v, addrDistinctIndex);
+
+      assert( isDistinct );
+      assert( pWInfo->eDistinct==WHERE_DISTINCT_ORDERED 
+           || pWInfo->eDistinct==WHERE_DISTINCT_UNIQUE 
+      );
+      distinct = -1;
+      if( pWInfo->eDistinct==WHERE_DISTINCT_ORDERED ){
+        int iJump;
+        int iExpr;
+        int iFlag = ++pParse->nMem;
+        int iBase = pParse->nMem+1;
+        int iBase2 = iBase + pEList->nExpr;
+        pParse->nMem += (pEList->nExpr*2);
+
+        /* Change the OP_OpenEphemeral coded earlier to an OP_Integer. The
+        ** OP_Integer initializes the "first row" flag.  */
+        pOp->opcode = OP_Integer;
+        pOp->p1 = 1;
+        pOp->p2 = iFlag;
+
+        sqlite3ExprCodeExprList(pParse, pEList, iBase, 1);
+        iJump = sqlite3VdbeCurrentAddr(v) + 1 + pEList->nExpr + 1 + 1;
+        sqlite3VdbeAddOp2(v, OP_If, iFlag, iJump-1);
+        for(iExpr=0; iExpr<pEList->nExpr; iExpr++){
+          CollSeq *pColl = sqlite3ExprCollSeq(pParse, pEList->a[iExpr].pExpr);
+          sqlite3VdbeAddOp3(v, OP_Ne, iBase+iExpr, iJump, iBase2+iExpr);
+          sqlite3VdbeChangeP4(v, -1, (const char *)pColl, P4_COLLSEQ);
+          sqlite3VdbeChangeP5(v, SQLITE_NULLEQ);
+        }
+        sqlite3VdbeAddOp2(v, OP_Goto, 0, pWInfo->iContinue);
+
+        sqlite3VdbeAddOp2(v, OP_Integer, 0, iFlag);
+        assert( sqlite3VdbeCurrentAddr(v)==iJump );
+        sqlite3VdbeAddOp3(v, OP_Move, iBase, iBase2, pEList->nExpr);
+      }else{
+        pOp->opcode = OP_Noop;
+      }
+    }
+
+    /* Use the standard inner loop. */
+    selectInnerLoop(pParse, p, pEList, 0, 0, pOrderBy, distinct, pDest,
                     pWInfo->iContinue, pWInfo->iBreak);
 
     /* End the database scan loop.
@@ -3952,6 +4067,8 @@ int sqlite3Select(
     int iAbortFlag;     /* Mem address which causes query abort if positive */
     int groupBySort;    /* Rows come from source in GROUP BY order */
     int addrEnd;        /* End of processing for this SELECT */
+    int sortPTab = 0;   /* Pseudotable used to decode sorting results */
+    int sortOut = 0;    /* Output register from the sorter */
 
     /* Remove any and all aliases between the result set and the
     ** GROUP BY clause.
@@ -4013,12 +4130,12 @@ int sqlite3Select(
 
       /* If there is a GROUP BY clause we might need a sorting index to
       ** implement it.  Allocate that sorting index now.  If it turns out
-      ** that we do not need it after all, the OpenEphemeral instruction
+      ** that we do not need it after all, the OP_SorterOpen instruction
       ** will be converted into a Noop.  
       */
       sAggInfo.sortingIdx = pParse->nTab++;
       pKeyInfo = keyInfoFromExprList(pParse, pGroupBy);
-      addrSortingIdx = sqlite3VdbeAddOp4(v, OP_OpenEphemeral, 
+      addrSortingIdx = sqlite3VdbeAddOp4(v, OP_SorterOpen, 
           sAggInfo.sortingIdx, sAggInfo.nSortingColumn, 
           0, (char*)pKeyInfo, P4_KEYINFO_HANDOFF);
 
@@ -4045,7 +4162,7 @@ int sqlite3Select(
       ** in the right order to begin with.
       */
       sqlite3VdbeAddOp2(v, OP_Gosub, regReset, addrReset);
-      pWInfo = sqlite3WhereBegin(pParse, pTabList, pWhere, &pGroupBy, 0);
+      pWInfo = sqlite3WhereBegin(pParse, pTabList, pWhere, &pGroupBy, 0, 0);
       if( pWInfo==0 ) goto select_end;
       if( pGroupBy==0 ){
         /* The optimizer is able to deliver rows in group by order so
@@ -4099,11 +4216,14 @@ int sqlite3Select(
         }
         regRecord = sqlite3GetTempReg(pParse);
         sqlite3VdbeAddOp3(v, OP_MakeRecord, regBase, nCol, regRecord);
-        sqlite3VdbeAddOp2(v, OP_IdxInsert, sAggInfo.sortingIdx, regRecord);
+        sqlite3VdbeAddOp2(v, OP_SorterInsert, sAggInfo.sortingIdx, regRecord);
         sqlite3ReleaseTempReg(pParse, regRecord);
         sqlite3ReleaseTempRange(pParse, regBase, nCol);
         sqlite3WhereEnd(pWInfo);
-        sqlite3VdbeAddOp2(v, OP_Sort, sAggInfo.sortingIdx, addrEnd);
+        sAggInfo.sortingIdxPTab = sortPTab = pParse->nTab++;
+        sortOut = sqlite3GetTempReg(pParse);
+        sqlite3VdbeAddOp3(v, OP_OpenPseudo, sortPTab, sortOut, nCol);
+        sqlite3VdbeAddOp2(v, OP_SorterSort, sAggInfo.sortingIdx, addrEnd);
         VdbeComment((v, "GROUP BY sort"));
         sAggInfo.useSortingIdx = 1;
         sqlite3ExprCacheClear(pParse);
@@ -4116,9 +4236,13 @@ int sqlite3Select(
       */
       addrTopOfLoop = sqlite3VdbeCurrentAddr(v);
       sqlite3ExprCacheClear(pParse);
+      if( groupBySort ){
+        sqlite3VdbeAddOp2(v, OP_SorterData, sAggInfo.sortingIdx, sortOut);
+      }
       for(j=0; j<pGroupBy->nExpr; j++){
         if( groupBySort ){
-          sqlite3VdbeAddOp3(v, OP_Column, sAggInfo.sortingIdx, j, iBMem+j);
+          sqlite3VdbeAddOp3(v, OP_Column, sortPTab, j, iBMem+j);
+          if( j==0 ) sqlite3VdbeChangeP5(v, OPFLAG_CLEARCACHE);
         }else{
           sAggInfo.directMode = 1;
           sqlite3ExprCode(pParse, pGroupBy->a[j].pExpr, iBMem+j);
@@ -4157,10 +4281,10 @@ int sqlite3Select(
       /* End of the loop
       */
       if( groupBySort ){
-        sqlite3VdbeAddOp2(v, OP_Next, sAggInfo.sortingIdx, addrTopOfLoop);
+        sqlite3VdbeAddOp2(v, OP_SorterNext, sAggInfo.sortingIdx, addrTopOfLoop);
       }else{
         sqlite3WhereEnd(pWInfo);
-        sqlite3VdbeChangeToNoop(v, addrSortingIdx, 1);
+        sqlite3VdbeChangeToNoop(v, addrSortingIdx);
       }
 
       /* Output the final row of result
@@ -4307,7 +4431,7 @@ int sqlite3Select(
         ** of output.
         */
         resetAccumulator(pParse, &sAggInfo);
-        pWInfo = sqlite3WhereBegin(pParse, pTabList, pWhere, &pMinMax, flag);
+        pWInfo = sqlite3WhereBegin(pParse, pTabList, pWhere, &pMinMax, 0, flag);
         if( pWInfo==0 ){
           sqlite3ExprListDelete(db, pDel);
           goto select_end;
diff --git a/src/shell.c b/src/shell.c
index a54c922e..07623e52 100644
--- a/src/shell.c
+++ b/src/shell.c
@@ -12,11 +12,22 @@
 ** This file contains code to implement the "sqlite" command line
 ** utility for accessing SQLite databases.
 */
-#if defined(_WIN32) || defined(WIN32)
+#if (defined(_WIN32) || defined(WIN32)) && !defined(_CRT_SECURE_NO_WARNINGS)
 /* This needs to come before any includes for MSVC compiler */
 #define _CRT_SECURE_NO_WARNINGS
 #endif
 
+/*
+** Enable large-file support for fopen() and friends on unix.
+*/
+#ifndef SQLITE_DISABLE_LFS
+# define _LARGE_FILE       1
+# ifndef _FILE_OFFSET_BITS
+#   define _FILE_OFFSET_BITS 64
+# endif
+# define _LARGEFILE_SOURCE 1
+#endif
+
 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h>
@@ -60,7 +71,7 @@
 #else
 /* Make sure isatty() has a prototype.
 */
-extern int isatty();
+extern int isatty(int);
 #endif
 
 #if defined(_WIN32_WCE)
@@ -74,6 +85,11 @@ extern int isatty();
 /* True if the timer is enabled */
 static int enableTimer = 0;
 
+/* ctype macros that work with signed characters */
+#define IsSpace(X)  isspace((unsigned char)X)
+#define IsDigit(X)  isdigit((unsigned char)X)
+#define ToLower(X)  (char)tolower((unsigned char)X)
+
 #if !defined(_WIN32) && !defined(WIN32) && !defined(__OS2__) && !defined(__RTP__) && !defined(_WRS_KERNEL)
 #include <sys/time.h>
 #include <sys/resource.h>
@@ -265,23 +281,23 @@ static void iotracePrintf(const char *zFormat, ...){
 */
 static int isNumber(const char *z, int *realnum){
   if( *z=='-' || *z=='+' ) z++;
-  if( !isdigit(*z) ){
+  if( !IsDigit(*z) ){
     return 0;
   }
   z++;
   if( realnum ) *realnum = 0;
-  while( isdigit(*z) ){ z++; }
+  while( IsDigit(*z) ){ z++; }
   if( *z=='.' ){
     z++;
-    if( !isdigit(*z) ) return 0;
-    while( isdigit(*z) ){ z++; }
+    if( !IsDigit(*z) ) return 0;
+    while( IsDigit(*z) ){ z++; }
     if( realnum ) *realnum = 1;
   }
   if( *z=='e' || *z=='E' ){
     z++;
     if( *z=='+' || *z=='-' ) z++;
-    if( !isdigit(*z) ) return 0;
-    while( isdigit(*z) ){ z++; }
+    if( !IsDigit(*z) ) return 0;
+    while( IsDigit(*z) ){ z++; }
     if( realnum ) *realnum = 1;
   }
   return *z==0;
@@ -322,7 +338,6 @@ static char *local_getline(char *zPrompt, FILE *in){
   char *zLine;
   int nLine;
   int n;
-  int eol;
 
   if( zPrompt && *zPrompt ){
     printf("%s",zPrompt);
@@ -332,8 +347,7 @@ static char *local_getline(char *zPrompt, FILE *in){
   zLine = malloc( nLine );
   if( zLine==0 ) return 0;
   n = 0;
-  eol = 0;
-  while( !eol ){
+  while( 1 ){
     if( n+100>nLine ){
       nLine = nLine*2 + 100;
       zLine = realloc(zLine, nLine);
@@ -345,7 +359,6 @@ static char *local_getline(char *zPrompt, FILE *in){
         return 0;
       }
       zLine[n] = 0;
-      eol = 1;
       break;
     }
     while( zLine[n] ){ n++; }
@@ -353,7 +366,7 @@ static char *local_getline(char *zPrompt, FILE *in){
       n--;
       if( n>0 && zLine[n-1]=='\r' ) n--;
       zLine[n] = 0;
-      eol = 1;
+      break;
     }
   }
   zLine = realloc( zLine, n+1 );
@@ -402,6 +415,7 @@ struct callback_data {
   int statsOn;           /* True to display memory stats before each finalize */
   int cnt;               /* Number of records displayed so far */
   FILE *out;             /* Write results here */
+  int nErr;              /* Number of errors seen */
   int mode;              /* An output mode setting */
   int writableSchema;    /* True if PRAGMA writable_schema=ON */
   int showHeader;        /* True to show column names in List or Column mode */
@@ -927,27 +941,33 @@ static char *appendText(char *zIn, char const *zAppend, char quote){
 ** querying the SQLITE_MASTER table.
 */
 static int run_table_dump_query(
-  FILE *out,              /* Send output here */
-  sqlite3 *db,            /* Database to query */
-  const char *zSelect,    /* SELECT statement to extract content */
-  const char *zFirstRow   /* Print before first row, if not NULL */
+  struct callback_data *p, /* Query context */
+  const char *zSelect,     /* SELECT statement to extract content */
+  const char *zFirstRow    /* Print before first row, if not NULL */
 ){
   sqlite3_stmt *pSelect;
   int rc;
-  rc = sqlite3_prepare(db, zSelect, -1, &pSelect, 0);
+  rc = sqlite3_prepare(p->db, zSelect, -1, &pSelect, 0);
   if( rc!=SQLITE_OK || !pSelect ){
+    fprintf(p->out, "/**** ERROR: (%d) %s *****/\n", rc, sqlite3_errmsg(p->db));
+    p->nErr++;
     return rc;
   }
   rc = sqlite3_step(pSelect);
   while( rc==SQLITE_ROW ){
     if( zFirstRow ){
-      fprintf(out, "%s", zFirstRow);
+      fprintf(p->out, "%s", zFirstRow);
       zFirstRow = 0;
     }
-    fprintf(out, "%s;\n", sqlite3_column_text(pSelect, 0));
+    fprintf(p->out, "%s;\n", sqlite3_column_text(pSelect, 0));
     rc = sqlite3_step(pSelect);
   }
-  return sqlite3_finalize(pSelect);
+  rc = sqlite3_finalize(pSelect);
+  if( rc!=SQLITE_OK ){
+    fprintf(p->out, "/**** ERROR: (%d) %s *****/\n", rc, sqlite3_errmsg(p->db));
+    p->nErr++;
+  }
+  return rc;
 }
 
 /*
@@ -1029,7 +1049,12 @@ static int display_stats(
     fprintf(pArg->out, "Lookaside failures due to OOM:       %d\n", iHiwtr);
     iHiwtr = iCur = -1;
     sqlite3_db_status(db, SQLITE_DBSTATUS_CACHE_USED, &iCur, &iHiwtr, bReset);
-    fprintf(pArg->out, "Pager Heap Usage:                    %d bytes\n", iCur); 
+    fprintf(pArg->out, "Pager Heap Usage:                    %d bytes\n", iCur);    iHiwtr = iCur = -1;
+    sqlite3_db_status(db, SQLITE_DBSTATUS_CACHE_HIT, &iCur, &iHiwtr, 1);
+    fprintf(pArg->out, "Page cache hits:                     %d\n", iCur);
+    iHiwtr = iCur = -1;
+    sqlite3_db_status(db, SQLITE_DBSTATUS_CACHE_MISS, &iCur, &iHiwtr, 1);
+    fprintf(pArg->out, "Page cache misses:                   %d\n", iCur); 
     iHiwtr = iCur = -1;
     sqlite3_db_status(db, SQLITE_DBSTATUS_SCHEMA_USED, &iCur, &iHiwtr, bReset);
     fprintf(pArg->out, "Schema Heap Usage:                   %d bytes\n", iCur); 
@@ -1069,6 +1094,7 @@ static int shell_exec(
 ){
   sqlite3_stmt *pStmt = NULL;     /* Statement to execute. */
   int rc = SQLITE_OK;             /* Return Code */
+  int rc2;
   const char *zLeftover;          /* Tail of unprocessed SQL */
 
   if( pzErrMsg ){
@@ -1085,7 +1111,7 @@ static int shell_exec(
       if( !pStmt ){
         /* this happens for a comment or white-space */
         zSql = zLeftover;
-        while( isspace(zSql[0]) ) zSql++;
+        while( IsSpace(zSql[0]) ) zSql++;
         continue;
       }
 
@@ -1162,10 +1188,11 @@ static int shell_exec(
       /* Finalize the statement just executed. If this fails, save a 
       ** copy of the error message. Otherwise, set zSql to point to the
       ** next statement to execute. */
-      rc = sqlite3_finalize(pStmt);
+      rc2 = sqlite3_finalize(pStmt);
+      if( rc!=SQLITE_NOMEM ) rc = rc2;
       if( rc==SQLITE_OK ){
         zSql = zLeftover;
-        while( isspace(zSql[0]) ) zSql++;
+        while( IsSpace(zSql[0]) ) zSql++;
       }else if( pzErrMsg ){
         *pzErrMsg = save_err_msg(db);
       }
@@ -1268,10 +1295,10 @@ static int dump_callback(void *pArg, int nArg, char **azArg, char **azCol){
     zSelect = appendText(zSelect, "|| ')' FROM  ", 0);
     zSelect = appendText(zSelect, zTable, '"');
 
-    rc = run_table_dump_query(p->out, p->db, zSelect, zPrepStmt);
+    rc = run_table_dump_query(p, zSelect, zPrepStmt);
     if( rc==SQLITE_CORRUPT ){
       zSelect = appendText(zSelect, " ORDER BY rowid DESC", 0);
-      rc = run_table_dump_query(p->out, p->db, zSelect, 0);
+      run_table_dump_query(p, zSelect, 0);
     }
     if( zSelect ) free(zSelect);
   }
@@ -1287,19 +1314,30 @@ static int dump_callback(void *pArg, int nArg, char **azArg, char **azCol){
 */
 static int run_schema_dump_query(
   struct callback_data *p, 
-  const char *zQuery,
-  char **pzErrMsg
+  const char *zQuery
 ){
   int rc;
-  rc = sqlite3_exec(p->db, zQuery, dump_callback, p, pzErrMsg);
+  char *zErr = 0;
+  rc = sqlite3_exec(p->db, zQuery, dump_callback, p, &zErr);
   if( rc==SQLITE_CORRUPT ){
     char *zQ2;
     int len = strlen30(zQuery);
-    if( pzErrMsg ) sqlite3_free(*pzErrMsg);
+    fprintf(p->out, "/****** CORRUPTION ERROR *******/\n");
+    if( zErr ){
+      fprintf(p->out, "/****** %s ******/\n", zErr);
+      sqlite3_free(zErr);
+      zErr = 0;
+    }
     zQ2 = malloc( len+100 );
     if( zQ2==0 ) return rc;
     sqlite3_snprintf(sizeof(zQ2), zQ2, "%s ORDER BY rowid DESC", zQuery);
-    rc = sqlite3_exec(p->db, zQ2, dump_callback, p, pzErrMsg);
+    rc = sqlite3_exec(p->db, zQ2, dump_callback, p, &zErr);
+    if( rc ){
+      fprintf(p->out, "/****** ERROR: %s ******/\n", zErr);
+    }else{
+      rc = SQLITE_CORRUPT;
+    }
+    sqlite3_free(zErr);
     free(zQ2);
   }
   return rc;
@@ -1436,7 +1474,7 @@ static int booleanValue(char *zArg){
   int val = atoi(zArg);
   int j;
   for(j=0; zArg[j]; j++){
-    zArg[j] = (char)tolower(zArg[j]);
+    zArg[j] = ToLower(zArg[j]);
   }
   if( strcmp(zArg,"on")==0 ){
     val = 1;
@@ -1462,7 +1500,7 @@ static int do_meta_command(char *zLine, struct callback_data *p){
   /* Parse the input line into tokens.
   */
   while( zLine[i] && nArg<ArraySize(azArg) ){
-    while( isspace((unsigned char)zLine[i]) ){ i++; }
+    while( IsSpace(zLine[i]) ){ i++; }
     if( zLine[i]==0 ) break;
     if( zLine[i]=='\'' || zLine[i]=='"' ){
       int delim = zLine[i++];
@@ -1474,7 +1512,7 @@ static int do_meta_command(char *zLine, struct callback_data *p){
       if( delim=='"' ) resolve_backslashes(azArg[nArg-1]);
     }else{
       azArg[nArg++] = &zLine[i];
-      while( zLine[i] && !isspace((unsigned char)zLine[i]) ){ i++; }
+      while( zLine[i] && !IsSpace(zLine[i]) ){ i++; }
       if( zLine[i] ) zLine[i++] = 0;
       resolve_backslashes(azArg[nArg-1]);
     }
@@ -1545,7 +1583,6 @@ static int do_meta_command(char *zLine, struct callback_data *p){
   }else
 
   if( c=='d' && strncmp(azArg[0], "dump", n)==0 && nArg<3 ){
-    char *zErrMsg = 0;
     open_db(p);
     /* When playing back a "dump", the content might appear in an order
     ** which causes immediate foreign key constraints to be violated.
@@ -1553,17 +1590,18 @@ static int do_meta_command(char *zLine, struct callback_data *p){
     fprintf(p->out, "PRAGMA foreign_keys=OFF;\n");
     fprintf(p->out, "BEGIN TRANSACTION;\n");
     p->writableSchema = 0;
-    sqlite3_exec(p->db, "PRAGMA writable_schema=ON", 0, 0, 0);
+    sqlite3_exec(p->db, "SAVEPOINT dump; PRAGMA writable_schema=ON", 0, 0, 0);
+    p->nErr = 0;
     if( nArg==1 ){
       run_schema_dump_query(p, 
         "SELECT name, type, sql FROM sqlite_master "
-        "WHERE sql NOT NULL AND type=='table' AND name!='sqlite_sequence'", 0
+        "WHERE sql NOT NULL AND type=='table' AND name!='sqlite_sequence'"
       );
       run_schema_dump_query(p, 
         "SELECT name, type, sql FROM sqlite_master "
-        "WHERE name=='sqlite_sequence'", 0
+        "WHERE name=='sqlite_sequence'"
       );
-      run_table_dump_query(p->out, p->db,
+      run_table_dump_query(p,
         "SELECT sql FROM sqlite_master "
         "WHERE sql NOT NULL AND type IN ('index','trigger','view')", 0
       );
@@ -1574,8 +1612,8 @@ static int do_meta_command(char *zLine, struct callback_data *p){
         run_schema_dump_query(p,
           "SELECT name, type, sql FROM sqlite_master "
           "WHERE tbl_name LIKE shellstatic() AND type=='table'"
-          "  AND sql NOT NULL", 0);
-        run_table_dump_query(p->out, p->db,
+          "  AND sql NOT NULL");
+        run_table_dump_query(p,
           "SELECT sql FROM sqlite_master "
           "WHERE sql NOT NULL"
           "  AND type IN ('index','trigger','view')"
@@ -1588,13 +1626,9 @@ static int do_meta_command(char *zLine, struct callback_data *p){
       fprintf(p->out, "PRAGMA writable_schema=OFF;\n");
       p->writableSchema = 0;
     }
-    sqlite3_exec(p->db, "PRAGMA writable_schema=OFF", 0, 0, 0);
-    if( zErrMsg ){
-      fprintf(stderr,"Error: %s\n", zErrMsg);
-      sqlite3_free(zErrMsg);
-    }else{
-      fprintf(p->out, "COMMIT;\n");
-    }
+    sqlite3_exec(p->db, "PRAGMA writable_schema=OFF;", 0, 0, 0);
+    sqlite3_exec(p->db, "RELEASE dump;", 0, 0, 0);
+    fprintf(p->out, p->nErr ? "ROLLBACK; -- due to errors\n" : "COMMIT;\n");
   }else
 
   if( c=='e' && strncmp(azArg[0], "echo", n)==0 && nArg>1 && nArg<3 ){
@@ -1673,7 +1707,7 @@ static int do_meta_command(char *zLine, struct callback_data *p){
       fprintf(stderr, "Error: non-null separator required for import\n");
       return 1;
     }
-    zSql = sqlite3_mprintf("SELECT * FROM '%q'", zTable);
+    zSql = sqlite3_mprintf("SELECT * FROM %s", zTable);
     if( zSql==0 ){
       fprintf(stderr, "Error: out of memory\n");
       return 1;
@@ -1695,7 +1729,7 @@ static int do_meta_command(char *zLine, struct callback_data *p){
       fprintf(stderr, "Error: out of memory\n");
       return 1;
     }
-    sqlite3_snprintf(nByte+20, zSql, "INSERT INTO '%q' VALUES(?", zTable);
+    sqlite3_snprintf(nByte+20, zSql, "INSERT INTO %s VALUES(?", zTable);
     j = strlen30(zSql);
     for(i=1; i<nCol; i++){
       zSql[j++] = ',';
@@ -1727,7 +1761,6 @@ static int do_meta_command(char *zLine, struct callback_data *p){
     zCommit = "COMMIT";
     while( (zLine = local_getline(0, in))!=0 ){
       char *z;
-      i = 0;
       lineno++;
       azCol[0] = zLine;
       for(i=0, z=zLine; *z && *z!='\n' && *z!='\r'; z++){
@@ -2016,7 +2049,7 @@ static int do_meta_command(char *zLine, struct callback_data *p){
     data.mode = MODE_Semi;
     if( nArg>1 ){
       int i;
-      for(i=0; azArg[1][i]; i++) azArg[1][i] = (char)tolower(azArg[1][i]);
+      for(i=0; azArg[1][i]; i++) azArg[1][i] = ToLower(azArg[1][i]);
       if( strcmp(azArg[1],"sqlite_master")==0 ){
         char *new_argv[2], *new_colv[2];
         new_argv[0] = "CREATE TABLE sqlite_master (\n"
@@ -2202,7 +2235,7 @@ static int do_meta_command(char *zLine, struct callback_data *p){
         if( testctrl<0 ){
           testctrl = aCtrl[i].ctrlCode;
         }else{
-          fprintf(stderr, "ambiguous option name: \"%s\"\n", azArg[i]);
+          fprintf(stderr, "ambiguous option name: \"%s\"\n", azArg[1]);
           testctrl = -1;
           break;
         }
@@ -2339,7 +2372,7 @@ static int _contains_semicolon(const char *z, int N){
 */
 static int _all_whitespace(const char *z){
   for(; *z; z++){
-    if( isspace(*(unsigned char*)z) ) continue;
+    if( IsSpace(z[0]) ) continue;
     if( *z=='/' && z[1]=='*' ){
       z += 2;
       while( *z && (*z!='*' || z[1]!='/') ){ z++; }
@@ -2364,11 +2397,11 @@ static int _all_whitespace(const char *z){
 ** as is the Oracle "/".
 */
 static int _is_command_terminator(const char *zLine){
-  while( isspace(*(unsigned char*)zLine) ){ zLine++; };
+  while( IsSpace(zLine[0]) ){ zLine++; };
   if( zLine[0]=='/' && _all_whitespace(&zLine[1]) ){
     return 1;  /* Oracle */
   }
-  if( tolower(zLine[0])=='g' && tolower(zLine[1])=='o'
+  if( ToLower(zLine[0])=='g' && ToLower(zLine[1])=='o'
          && _all_whitespace(&zLine[2]) ){
     return 1;  /* SQL Server */
   }
@@ -2438,7 +2471,7 @@ static int process_input(struct callback_data *p, FILE *in){
     nSqlPrior = nSql;
     if( zSql==0 ){
       int i;
-      for(i=0; zLine[i] && isspace((unsigned char)zLine[i]); i++){}
+      for(i=0; zLine[i] && IsSpace(zLine[i]); i++){}
       if( zLine[i]!=0 ){
         nSql = strlen30(zLine);
         zSql = malloc( nSql+3 );
@@ -2632,6 +2665,9 @@ static const char zOptions[] =
 #ifdef SQLITE_ENABLE_VFSTRACE
   "   -vfstrace            enable tracing of all VFS calls\n"
 #endif
+#ifdef SQLITE_ENABLE_MULTIPLEX
+  "   -multiplex           enable the multiplexor VFS\n"
+#endif
 ;
 static void usage(int showDetail){
   fprintf(stderr,
@@ -2707,6 +2743,7 @@ int main(int argc, char **argv){
     }else if( strcmp(argv[i],"-batch")==0 ){
       stdin_is_interactive = 0;
     }else if( strcmp(argv[i],"-heap")==0 ){
+#if defined(SQLITE_ENABLE_MEMSYS3) || defined(SQLITE_ENABLE_MEMSYS5)
       int j, c;
       const char *zSize;
       sqlite3_int64 szHeap;
@@ -2719,7 +2756,6 @@ int main(int argc, char **argv){
         if( c=='G' ){ szHeap *= 1000000000; break; }
       }
       if( szHeap>0x7fff0000 ) szHeap = 0x7fff0000;
-#if defined(SQLITE_ENABLE_MEMSYS3) || defined(SQLITE_ENABLE_MEMSYS5)
       sqlite3_config(SQLITE_CONFIG_HEAP, malloc((int)szHeap), (int)szHeap, 64);
 #endif
 #ifdef SQLITE_ENABLE_VFSTRACE
@@ -2732,6 +2768,11 @@ int main(int argc, char **argv){
          int makeDefault
       );
       vfstrace_register("trace",0,(int(*)(const char*,void*))fputs,stderr,1);
+#endif
+#ifdef SQLITE_ENABLE_MULTIPLEX
+    }else if( strcmp(argv[i],"-multiplex")==0 ){
+      extern int sqlite3_multiple_initialize(const char*,int);
+      sqlite3_multiplex_initialize(0, 1);
 #endif
     }else if( strcmp(argv[i],"-vfs")==0 ){
       sqlite3_vfs *pVfs = sqlite3_vfs_find(argv[++i]);
@@ -2851,8 +2892,14 @@ int main(int argc, char **argv){
       i++;
     }else if( strcmp(z,"-vfs")==0 ){
       i++;
+#ifdef SQLITE_ENABLE_VFSTRACE
     }else if( strcmp(z,"-vfstrace")==0 ){
       i++;
+#endif
+#ifdef SQLITE_ENABLE_MULTIPLEX
+    }else if( strcmp(z,"-multiplex")==0 ){
+      i++;
+#endif
     }else if( strcmp(z,"-help")==0 || strcmp(z, "--help")==0 ){
       usage(1);
     }else{
diff --git a/src/sqlite.h.in b/src/sqlite.h.in
index 2e6ca2b7..ed183307 100644
--- a/src/sqlite.h.in
+++ b/src/sqlite.h.in
@@ -736,6 +736,41 @@ struct sqlite3_io_methods {
 ** Applications should not call [sqlite3_file_control()] with this
 ** opcode as doing so may disrupt the operation of the specialized VFSes
 ** that do require it.  
+**
+** ^The [SQLITE_FCNTL_WIN32_AV_RETRY] opcode is used to configure automatic
+** retry counts and intervals for certain disk I/O operations for the
+** windows [VFS] in order to work to provide robustness against
+** anti-virus programs.  By default, the windows VFS will retry file read,
+** file write, and file delete operations up to 10 times, with a delay
+** of 25 milliseconds before the first retry and with the delay increasing
+** by an additional 25 milliseconds with each subsequent retry.  This
+** opcode allows those to values (10 retries and 25 milliseconds of delay)
+** to be adjusted.  The values are changed for all database connections
+** within the same process.  The argument is a pointer to an array of two
+** integers where the first integer i the new retry count and the second
+** integer is the delay.  If either integer is negative, then the setting
+** is not changed but instead the prior value of that setting is written
+** into the array entry, allowing the current retry settings to be
+** interrogated.  The zDbName parameter is ignored.
+**
+** ^The [SQLITE_FCNTL_PERSIST_WAL] opcode is used to set or query the
+** persistent [WAL | Write AHead Log] setting.  By default, the auxiliary
+** write ahead log and shared memory files used for transaction control
+** are automatically deleted when the latest connection to the database
+** closes.  Setting persistent WAL mode causes those files to persist after
+** close.  Persisting the files is useful when other processes that do not
+** have write permission on the directory containing the database file want
+** to read the database file, as the WAL and shared memory files must exist
+** in order for the database to be readable.  The fourth parameter to
+** [sqlite3_file_control()] for this opcode should be a pointer to an integer.
+** That integer is 0 to disable persistent WAL mode or 1 to enable persistent
+** WAL mode.  If the integer is -1, then it is overwritten with the current
+** WAL persistence setting.
+**
+** ^The [SQLITE_FCNTL_OVERWRITE] opcode is invoked by SQLite after opening
+** a write transaction to indicate that, unless it is rolled back for some
+** reason, the entire database file will be overwritten by the current 
+** transaction. This is used by VACUUM operations.
 */
 #define SQLITE_FCNTL_LOCKSTATE        1
 #define SQLITE_GET_LOCKPROXYFILE      2
@@ -745,7 +780,9 @@ struct sqlite3_io_methods {
 #define SQLITE_FCNTL_CHUNK_SIZE       6
 #define SQLITE_FCNTL_FILE_POINTER     7
 #define SQLITE_FCNTL_SYNC_OMITTED     8
-
+#define SQLITE_FCNTL_WIN32_AV_RETRY   9
+#define SQLITE_FCNTL_PERSIST_WAL     10
+#define SQLITE_FCNTL_OVERWRITE       11
 
 /*
 ** CAPI3REF: Mutex Handle
@@ -1173,16 +1210,10 @@ int sqlite3_db_config(sqlite3*, int op, ...);
 ** order to verify that SQLite recovers gracefully from such
 ** conditions.
 **
-** The xMalloc and xFree methods must work like the
-** malloc() and free() functions from the standard C library.
-** The xRealloc method must work like realloc() from the standard C library
-** with the exception that if the second argument to xRealloc is zero,
-** xRealloc must be a no-op - it must not perform any allocation or
-** deallocation.  ^SQLite guarantees that the second argument to
+** The xMalloc, xRealloc, and xFree methods must work like the
+** malloc(), realloc() and free() functions from the standard C library.
+** ^SQLite guarantees that the second argument to
 ** xRealloc is always a value returned by a prior call to xRoundup.
-** And so in cases where xRoundup always returns a positive number,
-** xRealloc can perform exactly as the standard library realloc() and
-** still be in compliance with this specification.
 **
 ** xSize should return the allocated size of a memory allocation
 ** previously obtained from xMalloc or xRealloc.  The allocated size
@@ -1368,8 +1399,8 @@ struct sqlite3_mem_methods {
 ** allocator is engaged to handle all of SQLites memory allocation needs.
 ** The first pointer (the memory pointer) must be aligned to an 8-byte
 ** boundary or subsequent behavior of SQLite will be undefined.
-** The minimum allocation size is capped at 2^12. Reasonable values
-** for the minimum allocation size are 2^5 through 2^8.</dd>
+** The minimum allocation size is capped at 2**12. Reasonable values
+** for the minimum allocation size are 2**5 through 2**8.</dd>
 **
 ** [[SQLITE_CONFIG_MUTEX]] <dt>SQLITE_CONFIG_MUTEX</dt>
 ** <dd> ^(This option takes a single argument which is a pointer to an
@@ -2768,7 +2799,8 @@ int sqlite3_limit(sqlite3*, int id, int newVal);
 ** that the supplied string is nul-terminated, then there is a small
 ** performance advantage to be gained by passing an nByte parameter that
 ** is equal to the number of bytes in the input string <i>including</i>
-** the nul-terminator bytes.
+** the nul-terminator bytes as this saves SQLite from having to
+** make a copy of the input string.
 **
 ** ^If pzTail is not NULL then *pzTail is made to point to the first byte
 ** past the end of the first SQL statement in zSql.  These routines only
@@ -2819,7 +2851,7 @@ int sqlite3_limit(sqlite3*, int id, int newVal);
 ** ^The specific value of WHERE-clause [parameter] might influence the 
 ** choice of query plan if the parameter is the left-hand side of a [LIKE]
 ** or [GLOB] operator or if the parameter is compared to an indexed column
-** and the [SQLITE_ENABLE_STAT2] compile-time option is enabled.
+** and the [SQLITE_ENABLE_STAT3] compile-time option is enabled.
 ** the 
 ** </li>
 ** </ol>
@@ -2989,6 +3021,13 @@ typedef struct sqlite3_context sqlite3_context;
 ** number of <u>bytes</u> in the value, not the number of characters.)^
 ** ^If the fourth parameter is negative, the length of the string is
 ** the number of bytes up to the first zero terminator.
+** If a non-negative fourth parameter is provided to sqlite3_bind_text()
+** or sqlite3_bind_text16() then that parameter must be the byte offset
+** where the NUL terminator would occur assuming the string were NUL
+** terminated.  If any NUL characters occur at byte offsets less than 
+** the value of the fourth parameter then the resulting string value will
+** contain embedded NULs.  The result of expressions involving strings
+** with embedded NULs is undefined.
 **
 ** ^The fifth argument to sqlite3_bind_blob(), sqlite3_bind_text(), and
 ** sqlite3_bind_text16() is a destructor used to dispose of the BLOB or
@@ -3322,6 +3361,12 @@ int sqlite3_step(sqlite3_stmt*);
 ** (via calls to the [sqlite3_column_int | sqlite3_column_*()] of
 ** interfaces) then sqlite3_data_count(P) returns 0.
 ** ^The sqlite3_data_count(P) routine also returns 0 if P is a NULL pointer.
+** ^The sqlite3_data_count(P) routine returns 0 if the previous call to
+** [sqlite3_step](P) returned [SQLITE_DONE].  ^The sqlite3_data_count(P)
+** will return non-zero if previous call to [sqlite3_step](P) returned
+** [SQLITE_ROW], except in the case of the [PRAGMA incremental_vacuum]
+** where it always returns zero since each step of that multi-step
+** pragma returns 0 columns of data.
 **
 ** See also: [sqlite3_column_count()]
 */
@@ -4001,7 +4046,12 @@ typedef void (*sqlite3_destructor_type)(void*);
 ** ^If the 3rd parameter to the sqlite3_result_text* interfaces
 ** is non-negative, then as many bytes (not characters) of the text
 ** pointed to by the 2nd parameter are taken as the application-defined
-** function result.
+** function result.  If the 3rd parameter is non-negative, then it
+** must be the byte offset into the string where the NUL terminator would
+** appear if the string where NUL terminated.  If any NUL characters occur
+** in the string at a byte offset that is less than the value of the 3rd
+** parameter, then the resulting string will contain embedded NULs and the
+** result of expressions operating on strings with embedded NULs is undefined.
 ** ^If the 4th parameter to the sqlite3_result_text* interfaces
 ** or sqlite3_result_blob is a non-NULL pointer, then SQLite calls that
 ** function as the destructor on the text or BLOB result when it has
@@ -5784,6 +5834,18 @@ int sqlite3_db_status(sqlite3*, int op, int *pCur, int *pHiwtr, int resetFlg);
 ** the database connection.)^
 ** ^The highwater mark associated with SQLITE_DBSTATUS_STMT_USED is always 0.
 ** </dd>
+**
+** [[SQLITE_DBSTATUS_CACHE_HIT]] ^(<dt>SQLITE_DBSTATUS_CACHE_HIT</dt>
+** <dd>This parameter returns the number of pager cache hits that have
+** occurred.)^ ^The highwater mark associated with SQLITE_DBSTATUS_CACHE_HIT 
+** is always 0.
+** </dd>
+**
+** [[SQLITE_DBSTATUS_CACHE_MISS]] ^(<dt>SQLITE_DBSTATUS_CACHE_MISS</dt>
+** <dd>This parameter returns the number of pager cache misses that have
+** occurred.)^ ^The highwater mark associated with SQLITE_DBSTATUS_CACHE_MISS 
+** is always 0.
+** </dd>
 ** </dl>
 */
 #define SQLITE_DBSTATUS_LOOKASIDE_USED       0
@@ -5793,7 +5855,9 @@ int sqlite3_db_status(sqlite3*, int op, int *pCur, int *pHiwtr, int resetFlg);
 #define SQLITE_DBSTATUS_LOOKASIDE_HIT        4
 #define SQLITE_DBSTATUS_LOOKASIDE_MISS_SIZE  5
 #define SQLITE_DBSTATUS_LOOKASIDE_MISS_FULL  6
-#define SQLITE_DBSTATUS_MAX                  6   /* Largest defined DBSTATUS */
+#define SQLITE_DBSTATUS_CACHE_HIT            7
+#define SQLITE_DBSTATUS_CACHE_MISS           8
+#define SQLITE_DBSTATUS_MAX                  8   /* Largest defined DBSTATUS */
 
 
 /*
@@ -5847,7 +5911,6 @@ int sqlite3_stmt_status(sqlite3_stmt*, int op,int resetFlg);
 ** A non-zero value in this counter may indicate an opportunity to
 ** improvement performance by adding permanent indices that do not
 ** need to be reinitialized each time the statement is run.</dd>
-**
 ** </dl>
 */
 #define SQLITE_STMTSTATUS_FULLSCAN_STEP     1
diff --git a/src/sqlite3ext.h b/src/sqlite3ext.h
index e45e691f..5abcde2c 100644
--- a/src/sqlite3ext.h
+++ b/src/sqlite3ext.h
@@ -49,8 +49,10 @@ struct sqlite3_api_routines {
   int  (*busy_timeout)(sqlite3*,int ms);
   int  (*changes)(sqlite3*);
   int  (*close)(sqlite3*);
-  int  (*collation_needed)(sqlite3*,void*,void(*)(void*,sqlite3*,int eTextRep,const char*));
-  int  (*collation_needed16)(sqlite3*,void*,void(*)(void*,sqlite3*,int eTextRep,const void*));
+  int  (*collation_needed)(sqlite3*,void*,void(*)(void*,sqlite3*,
+                           int eTextRep,const char*));
+  int  (*collation_needed16)(sqlite3*,void*,void(*)(void*,sqlite3*,
+                             int eTextRep,const void*));
   const void * (*column_blob)(sqlite3_stmt*,int iCol);
   int  (*column_bytes)(sqlite3_stmt*,int iCol);
   int  (*column_bytes16)(sqlite3_stmt*,int iCol);
@@ -75,10 +77,18 @@ struct sqlite3_api_routines {
   void * (*commit_hook)(sqlite3*,int(*)(void*),void*);
   int  (*complete)(const char*sql);
   int  (*complete16)(const void*sql);
-  int  (*create_collation)(sqlite3*,const char*,int,void*,int(*)(void*,int,const void*,int,const void*));
-  int  (*create_collation16)(sqlite3*,const void*,int,void*,int(*)(void*,int,const void*,int,const void*));
-  int  (*create_function)(sqlite3*,const char*,int,int,void*,void (*xFunc)(sqlite3_context*,int,sqlite3_value**),void (*xStep)(sqlite3_context*,int,sqlite3_value**),void (*xFinal)(sqlite3_context*));
-  int  (*create_function16)(sqlite3*,const void*,int,int,void*,void (*xFunc)(sqlite3_context*,int,sqlite3_value**),void (*xStep)(sqlite3_context*,int,sqlite3_value**),void (*xFinal)(sqlite3_context*));
+  int  (*create_collation)(sqlite3*,const char*,int,void*,
+                           int(*)(void*,int,const void*,int,const void*));
+  int  (*create_collation16)(sqlite3*,const void*,int,void*,
+                             int(*)(void*,int,const void*,int,const void*));
+  int  (*create_function)(sqlite3*,const char*,int,int,void*,
+                          void (*xFunc)(sqlite3_context*,int,sqlite3_value**),
+                          void (*xStep)(sqlite3_context*,int,sqlite3_value**),
+                          void (*xFinal)(sqlite3_context*));
+  int  (*create_function16)(sqlite3*,const void*,int,int,void*,
+                            void (*xFunc)(sqlite3_context*,int,sqlite3_value**),
+                            void (*xStep)(sqlite3_context*,int,sqlite3_value**),
+                            void (*xFinal)(sqlite3_context*));
   int (*create_module)(sqlite3*,const char*,const sqlite3_module*,void*);
   int  (*data_count)(sqlite3_stmt*pStmt);
   sqlite3 * (*db_handle)(sqlite3_stmt*);
@@ -123,16 +133,19 @@ struct sqlite3_api_routines {
   void  (*result_text16le)(sqlite3_context*,const void*,int,void(*)(void*));
   void  (*result_value)(sqlite3_context*,sqlite3_value*);
   void * (*rollback_hook)(sqlite3*,void(*)(void*),void*);
-  int  (*set_authorizer)(sqlite3*,int(*)(void*,int,const char*,const char*,const char*,const char*),void*);
+  int  (*set_authorizer)(sqlite3*,int(*)(void*,int,const char*,const char*,
+                         const char*,const char*),void*);
   void  (*set_auxdata)(sqlite3_context*,int,void*,void (*)(void*));
   char * (*snprintf)(int,char*,const char*,...);
   int  (*step)(sqlite3_stmt*);
-  int  (*table_column_metadata)(sqlite3*,const char*,const char*,const char*,char const**,char const**,int*,int*,int*);
+  int  (*table_column_metadata)(sqlite3*,const char*,const char*,const char*,
+                                char const**,char const**,int*,int*,int*);
   void  (*thread_cleanup)(void);
   int  (*total_changes)(sqlite3*);
   void * (*trace)(sqlite3*,void(*xTrace)(void*,const char*),void*);
   int  (*transfer_bindings)(sqlite3_stmt*,sqlite3_stmt*);
-  void * (*update_hook)(sqlite3*,void(*)(void*,int ,char const*,char const*,sqlite_int64),void*);
+  void * (*update_hook)(sqlite3*,void(*)(void*,int ,char const*,char const*,
+                                         sqlite_int64),void*);
   void * (*user_data)(sqlite3_context*);
   const void * (*value_blob)(sqlite3_value*);
   int  (*value_bytes)(sqlite3_value*);
@@ -154,15 +167,19 @@ struct sqlite3_api_routines {
   int (*prepare16_v2)(sqlite3*,const void*,int,sqlite3_stmt**,const void**);
   int (*clear_bindings)(sqlite3_stmt*);
   /* Added by 3.4.1 */
-  int (*create_module_v2)(sqlite3*,const char*,const sqlite3_module*,void*,void (*xDestroy)(void *));
+  int (*create_module_v2)(sqlite3*,const char*,const sqlite3_module*,void*,
+                          void (*xDestroy)(void *));
   /* Added by 3.5.0 */
   int (*bind_zeroblob)(sqlite3_stmt*,int,int);
   int (*blob_bytes)(sqlite3_blob*);
   int (*blob_close)(sqlite3_blob*);
-  int (*blob_open)(sqlite3*,const char*,const char*,const char*,sqlite3_int64,int,sqlite3_blob**);
+  int (*blob_open)(sqlite3*,const char*,const char*,const char*,sqlite3_int64,
+                   int,sqlite3_blob**);
   int (*blob_read)(sqlite3_blob*,void*,int,int);
   int (*blob_write)(sqlite3_blob*,const void*,int,int);
-  int (*create_collation_v2)(sqlite3*,const char*,int,void*,int(*)(void*,int,const void*,int,const void*),void(*)(void*));
+  int (*create_collation_v2)(sqlite3*,const char*,int,void*,
+                             int(*)(void*,int,const void*,int,const void*),
+                             void(*)(void*));
   int (*file_control)(sqlite3*,const char*,int,void*);
   sqlite3_int64 (*memory_highwater)(int);
   sqlite3_int64 (*memory_used)(void);
@@ -198,7 +215,11 @@ struct sqlite3_api_routines {
   int (*backup_step)(sqlite3_backup*,int);
   const char *(*compileoption_get)(int);
   int (*compileoption_used)(const char*);
-  int (*create_function_v2)(sqlite3*,const char*,int,int,void*,void (*xFunc)(sqlite3_context*,int,sqlite3_value**),void (*xStep)(sqlite3_context*,int,sqlite3_value**),void (*xFinal)(sqlite3_context*),void(*xDestroy)(void*));
+  int (*create_function_v2)(sqlite3*,const char*,int,int,void*,
+                            void (*xFunc)(sqlite3_context*,int,sqlite3_value**),
+                            void (*xStep)(sqlite3_context*,int,sqlite3_value**),
+                            void (*xFinal)(sqlite3_context*),
+                            void(*xDestroy)(void*));
   int (*db_config)(sqlite3*,int,...);
   sqlite3_mutex *(*db_mutex)(sqlite3*);
   int (*db_status)(sqlite3*,int,int*,int*,int);
@@ -212,6 +233,9 @@ struct sqlite3_api_routines {
   int (*wal_autocheckpoint)(sqlite3*,int);
   int (*wal_checkpoint)(sqlite3*,const char*);
   void *(*wal_hook)(sqlite3*,int(*)(void*,sqlite3*,const char*,int),void*);
+  int (*blob_reopen)(sqlite3_blob*,sqlite3_int64);
+  int (*vtab_config)(sqlite3*,int op,...);
+  int (*vtab_on_conflict)(sqlite3*);
 };
 
 /*
@@ -412,6 +436,9 @@ struct sqlite3_api_routines {
 #define sqlite3_wal_autocheckpoint     sqlite3_api->wal_autocheckpoint
 #define sqlite3_wal_checkpoint         sqlite3_api->wal_checkpoint
 #define sqlite3_wal_hook               sqlite3_api->wal_hook
+#define sqlite3_blob_reopen            sqlite3_api->blob_reopen
+#define sqlite3_vtab_config            sqlite3_api->vtab_config
+#define sqlite3_vtab_on_conflict       sqlite3_api->vtab_on_conflict
 #endif /* SQLITE_CORE */
 
 #define SQLITE_EXTENSION_INIT1     const sqlite3_api_routines *sqlite3_api = 0;
diff --git a/src/sqliteInt.h b/src/sqliteInt.h
index 09f64b79..9e276541 100644
--- a/src/sqliteInt.h
+++ b/src/sqliteInt.h
@@ -76,13 +76,6 @@
 #include <inttypes.h>
 #endif
 
-/*
-** The number of samples of an index that SQLite takes in order to 
-** construct a histogram of the table content when running ANALYZE
-** and with SQLITE_ENABLE_STAT2
-*/
-#define SQLITE_INDEX_SAMPLES 10
-
 /*
 ** The following macros are used to cast pointers to integers and
 ** integers to pointers.  The way you do this varies from one compiler
@@ -147,19 +140,25 @@
 ** specify which memory allocation subsystem to use.
 **
 **     SQLITE_SYSTEM_MALLOC          // Use normal system malloc()
+**     SQLITE_WIN32_MALLOC           // Use Win32 native heap API
 **     SQLITE_MEMDEBUG               // Debugging version of system malloc()
 **
+** On Windows, if the SQLITE_WIN32_MALLOC_VALIDATE macro is defined and the
+** assert() macro is enabled, each call into the Win32 native heap subsystem
+** will cause HeapValidate to be called.  If heap validation should fail, an
+** assertion will be triggered.
+**
 ** (Historical note:  There used to be several other options, but we've
-** pared it down to just these two.)
+** pared it down to just these three.)
 **
 ** If none of the above are defined, then set SQLITE_SYSTEM_MALLOC as
 ** the default.
 */
-#if defined(SQLITE_SYSTEM_MALLOC)+defined(SQLITE_MEMDEBUG)>1
+#if defined(SQLITE_SYSTEM_MALLOC)+defined(SQLITE_WIN32_MALLOC)+defined(SQLITE_MEMDEBUG)>1
 # error "At most one of the following compile-time configuration options\
- is allows: SQLITE_SYSTEM_MALLOC, SQLITE_MEMDEBUG"
+ is allows: SQLITE_SYSTEM_MALLOC, SQLITE_WIN32_MALLOC, SQLITE_MEMDEBUG"
 #endif
-#if defined(SQLITE_SYSTEM_MALLOC)+defined(SQLITE_MEMDEBUG)==0
+#if defined(SQLITE_SYSTEM_MALLOC)+defined(SQLITE_WIN32_MALLOC)+defined(SQLITE_MEMDEBUG)==0
 # define SQLITE_SYSTEM_MALLOC 1
 #endif
 
@@ -445,6 +444,18 @@ typedef INT8_TYPE i8;              /* 1-byte signed integer */
 */
 #define SQLITE_MAX_U32  ((((u64)1)<<32)-1)
 
+/*
+** The datatype used to store estimates of the number of rows in a
+** table or index.  This is an unsigned integer type.  For 99.9% of
+** the world, a 32-bit integer is sufficient.  But a 64-bit integer
+** can be used at compile-time if desired.
+*/
+#ifdef SQLITE_64BIT_STATS
+ typedef u64 tRowcnt;    /* 64-bit only if requested at compile-time */
+#else
+ typedef u32 tRowcnt;    /* 32-bit is the default */
+#endif
+
 /*
 ** Macros to determine whether the machine is big or little endian,
 ** evaluated at runtime.
@@ -956,6 +967,7 @@ struct sqlite3 {
 #define SQLITE_GroupByOrder   0x20        /* Disable GROUPBY cover of ORDERBY */
 #define SQLITE_FactorOutConst 0x40        /* Disable factoring out constants */
 #define SQLITE_IdxRealAsInt   0x80        /* Store REAL as INT in indices */
+#define SQLITE_DistinctOpt    0x80        /* DISTINCT using indexes */
 #define SQLITE_OptMask        0xff        /* Mask of all disablable opts */
 
 /*
@@ -1277,7 +1289,7 @@ struct Table {
   Column *aCol;        /* Information about each column */
   Index *pIndex;       /* List of SQL indexes on this table. */
   int tnum;            /* Root BTree node for this table (see note above) */
-  unsigned nRowEst;    /* Estimated rows in table - from sqlite_stat1 table */
+  tRowcnt nRowEst;     /* Estimated rows in table - from sqlite_stat1 table */
   Select *pSelect;     /* NULL for tables.  Points to definition if a view. */
   u16 nRef;            /* Number of pointers to this Table */
   u8 tabFlags;         /* Mask of TF_* values */
@@ -1476,7 +1488,7 @@ struct Index {
   char *zName;     /* Name of this index */
   int nColumn;     /* Number of columns in the table used by this index */
   int *aiColumn;   /* Which columns are used by this index.  1st is 0 */
-  unsigned *aiRowEst; /* Result of ANALYZE: Est. rows selected by each column */
+  tRowcnt *aiRowEst; /* Result of ANALYZE: Est. rows selected by each column */
   Table *pTable;   /* The SQL table being indexed */
   int tnum;        /* Page containing root of this index in database file */
   u8 onError;      /* OE_Abort, OE_Ignore, OE_Replace, or OE_None */
@@ -1487,20 +1499,29 @@ struct Index {
   Schema *pSchema; /* Schema containing this index */
   u8 *aSortOrder;  /* Array of size Index.nColumn. True==DESC, False==ASC */
   char **azColl;   /* Array of collation sequence names for index */
-  IndexSample *aSample;    /* Array of SQLITE_INDEX_SAMPLES samples */
+#ifdef SQLITE_ENABLE_STAT3
+  int nSample;             /* Number of elements in aSample[] */
+  tRowcnt avgEq;           /* Average nEq value for key values not in aSample */
+  IndexSample *aSample;    /* Samples of the left-most key */
+#endif
 };
 
 /*
-** Each sample stored in the sqlite_stat2 table is represented in memory 
-** using a structure of this type.
+** Each sample stored in the sqlite_stat3 table is represented in memory 
+** using a structure of this type.  See documentation at the top of the
+** analyze.c source file for additional information.
 */
 struct IndexSample {
   union {
     char *z;        /* Value if eType is SQLITE_TEXT or SQLITE_BLOB */
-    double r;       /* Value if eType is SQLITE_FLOAT or SQLITE_INTEGER */
+    double r;       /* Value if eType is SQLITE_FLOAT */
+    i64 i;          /* Value if eType is SQLITE_INTEGER */
   } u;
   u8 eType;         /* SQLITE_NULL, SQLITE_INTEGER ... etc. */
-  u8 nByte;         /* Size in byte of text or blob. */
+  int nByte;        /* Size in byte of text or blob. */
+  tRowcnt nEq;      /* Est. number of rows where the key equals this sample */
+  tRowcnt nLt;      /* Est. number of rows where key is less than this sample */
+  tRowcnt nDLt;     /* Est. number of distinct keys less than this sample */
 };
 
 /*
@@ -1535,6 +1556,7 @@ struct AggInfo {
   u8 useSortingIdx;       /* In direct mode, reference the sorting index rather
                           ** than the source table */
   int sortingIdx;         /* Cursor number of the sorting index */
+  int sortingIdxPTab;     /* Cursor number of pseudo-table */
   ExprList *pGroupBy;     /* The group by clause */
   int nSortingColumn;     /* Number of columns in the sorting index */
   struct AggInfo_col {    /* For each column used in source tables */
@@ -1844,9 +1866,11 @@ struct SrcList {
     char *zAlias;     /* The "B" part of a "A AS B" phrase.  zName is the "A" */
     Table *pTab;      /* An SQL table corresponding to zName */
     Select *pSelect;  /* A SELECT statement used in place of a table name */
-    u8 isPopulated;   /* Temporary table associated with SELECT is populated */
+    int addrFillSub;  /* Address of subroutine to manifest a subquery */
+    int regReturn;    /* Register holding return address of addrFillSub */
     u8 jointype;      /* Type of join between this able and the previous */
     u8 notIndexed;    /* True if there is a NOT INDEXED clause */
+    u8 isCorrelated;  /* True if sub-query is correlated */
 #ifndef SQLITE_OMIT_EXPLAIN
     u8 iSelectId;     /* If pSelect!=0, the id of the sub-select in EQP */
 #endif
@@ -1949,10 +1973,10 @@ struct WhereLevel {
 #define WHERE_ORDERBY_MAX      0x0002 /* ORDER BY processing for max() func */
 #define WHERE_ONEPASS_DESIRED  0x0004 /* Want to do one-pass UPDATE/DELETE */
 #define WHERE_DUPLICATES_OK    0x0008 /* Ok to return a row more than once */
-#define WHERE_OMIT_OPEN        0x0010 /* Table cursors are already open */
-#define WHERE_OMIT_CLOSE       0x0020 /* Omit close of table & index cursors */
-#define WHERE_FORCE_TABLE      0x0040 /* Do not use an index-only search */
-#define WHERE_ONETABLE_ONLY    0x0080 /* Only code the 1st table in pTabList */
+#define WHERE_OMIT_OPEN_CLOSE  0x0010 /* Table cursors are already open */
+#define WHERE_FORCE_TABLE      0x0020 /* Do not use an index-only search */
+#define WHERE_ONETABLE_ONLY    0x0040 /* Only code the 1st table in pTabList */
+#define WHERE_AND_ONLY         0x0080 /* Don't use indices for OR terms */
 
 /*
 ** The WHERE clause processing routine has two halves.  The
@@ -1966,6 +1990,7 @@ struct WhereInfo {
   u16 wctrlFlags;      /* Flags originally passed to sqlite3WhereBegin() */
   u8 okOnePass;        /* Ok to use one-pass algorithm for UPDATE or DELETE */
   u8 untestedTerms;    /* Not all WHERE terms resolved by outer loop */
+  u8 eDistinct;
   SrcList *pTabList;             /* List of tables in the join */
   int iTop;                      /* The very beginning of the WHERE loop */
   int iContinue;                 /* Jump here to continue with next record */
@@ -1977,6 +2002,9 @@ struct WhereInfo {
   WhereLevel a[1];               /* Information about each nest loop in WHERE */
 };
 
+#define WHERE_DISTINCT_UNIQUE 1
+#define WHERE_DISTINCT_ORDERED 2
+
 /*
 ** A NameContext defines a context in which to resolve table and column
 ** names.  The context consists of a list of tables (the pSrcList) field and
@@ -2062,6 +2090,7 @@ struct Select {
 #define SF_UsesEphemeral   0x0008  /* Uses the OpenEphemeral opcode */
 #define SF_Expanded        0x0010  /* sqlite3SelectExpand() called on this */
 #define SF_HasTypeInfo     0x0020  /* FROM subqueries have Table metadata */
+#define SF_UseSorter       0x0040  /* Sort using a sorter */
 
 
 /*
@@ -2701,6 +2730,7 @@ void sqlite3CreateView(Parse*,Token*,Token*,Token*,Select*,int,int);
 #endif
 
 void sqlite3DropTable(Parse*, SrcList*, int, int);
+void sqlite3CodeDropTable(Parse*, Table*, int, int);
 void sqlite3DeleteTable(sqlite3*, Table*);
 #ifndef SQLITE_OMIT_AUTOINCREMENT
   void sqlite3AutoincrementBegin(Parse *pParse);
@@ -2738,7 +2768,7 @@ Expr *sqlite3LimitWhere(Parse *, SrcList *, Expr *, ExprList *, Expr *, Expr *,
 #endif
 void sqlite3DeleteFrom(Parse*, SrcList*, Expr*);
 void sqlite3Update(Parse*, SrcList*, ExprList*, Expr*, int);
-WhereInfo *sqlite3WhereBegin(Parse*, SrcList*, Expr*, ExprList**, u16);
+WhereInfo *sqlite3WhereBegin(Parse*, SrcList*, Expr*, ExprList**,ExprList*,u16);
 void sqlite3WhereEnd(WhereInfo*);
 int sqlite3ExprCodeGetColumn(Parse*, Table*, int, int, int);
 void sqlite3ExprCodeGetColumnOfTable(Vdbe*, Table*, int, int, int);
@@ -2957,7 +2987,7 @@ void sqlite3ValueSetStr(sqlite3_value*, int, const void *,u8,
 void sqlite3ValueFree(sqlite3_value*);
 sqlite3_value *sqlite3ValueNew(sqlite3 *);
 char *sqlite3Utf16to8(sqlite3 *, const void*, int, u8);
-#ifdef SQLITE_ENABLE_STAT2
+#ifdef SQLITE_ENABLE_STAT3
 char *sqlite3Utf8to16(sqlite3 *, u8, char *, int, int *);
 #endif
 int sqlite3ValueFromExpr(sqlite3 *, Expr *, u8, u8, sqlite3_value **);
@@ -3059,6 +3089,7 @@ void sqlite3AutoLoadExtensions(sqlite3*);
 #  define sqlite3VtabUnlock(X)
 #  define sqlite3VtabUnlockList(X)
 #  define sqlite3VtabSavepoint(X, Y, Z) SQLITE_OK
+#  define sqlite3GetVTable(X,Y)  ((VTable*)0)
 #else
    void sqlite3VtabClear(sqlite3 *db, Table*);
    int sqlite3VtabSync(sqlite3 *db, char **);
@@ -3068,6 +3099,7 @@ void sqlite3AutoLoadExtensions(sqlite3*);
    void sqlite3VtabUnlock(VTable *);
    void sqlite3VtabUnlockList(sqlite3*);
    int sqlite3VtabSavepoint(sqlite3 *, int, int);
+   VTable *sqlite3GetVTable(sqlite3*, Table*);
 #  define sqlite3VtabInSync(db) ((db)->nVTrans>0 && (db)->aVTrans==0)
 #endif
 void sqlite3VtabMakeWritable(Parse*,Table*);
@@ -3087,7 +3119,6 @@ int sqlite3Reprepare(Vdbe*);
 void sqlite3ExprListCheckLength(Parse*, ExprList*, const char*);
 CollSeq *sqlite3BinaryCompareCollSeq(Parse *, Expr *, Expr *);
 int sqlite3TempInMemory(const sqlite3*);
-VTable *sqlite3GetVTable(sqlite3*, Table*);
 const char *sqlite3JournalModename(int);
 int sqlite3Checkpoint(sqlite3*, int, int, int*, int*);
 int sqlite3WalDefaultHook(void*,sqlite3*,const char*,int);
diff --git a/src/status.c b/src/status.c
index b8c1d58d..b23238bb 100644
--- a/src/status.c
+++ b/src/status.c
@@ -218,6 +218,28 @@ int sqlite3_db_status(
       break;
     }
 
+    /*
+    ** Set *pCurrent to the total cache hits or misses encountered by all
+    ** pagers the database handle is connected to. *pHighwater is always set 
+    ** to zero.
+    */
+    case SQLITE_DBSTATUS_CACHE_HIT:
+    case SQLITE_DBSTATUS_CACHE_MISS: {
+      int i;
+      int nRet = 0;
+      assert( SQLITE_DBSTATUS_CACHE_MISS==SQLITE_DBSTATUS_CACHE_HIT+1 );
+
+      for(i=0; i<db->nDb; i++){
+        if( db->aDb[i].pBt ){
+          Pager *pPager = sqlite3BtreePager(db->aDb[i].pBt);
+          sqlite3PagerCacheStat(pPager, op, resetFlag, &nRet);
+        }
+      }
+      *pHighwater = 0;
+      *pCurrent = nRet;
+      break;
+    }
+
     default: {
       rc = SQLITE_ERROR;
     }
diff --git a/src/tclsqlite.c b/src/tclsqlite.c
index ad4d27a1..c8f0fbd3 100644
--- a/src/tclsqlite.c
+++ b/src/tclsqlite.c
@@ -107,6 +107,11 @@ typedef struct IncrblobChannel IncrblobChannel;
 /*
 ** There is one instance of this structure for each SQLite database
 ** that has been opened by the SQLite TCL interface.
+**
+** If this module is built with SQLITE_TEST defined (to create the SQLite
+** testfixture executable), then it may be configured to use either
+** sqlite3_prepare_v2() or sqlite3_prepare() to prepare SQL statements.
+** If SqliteDb.bLegacyPrepare is true, sqlite3_prepare() is used.
 */
 typedef struct SqliteDb SqliteDb;
 struct SqliteDb {
@@ -135,6 +140,9 @@ struct SqliteDb {
   IncrblobChannel *pIncrblob;/* Linked list of open incrblob channels */
   int nStep, nSort, nIndex;  /* Statistics for most recent operation */
   int nTransaction;          /* Number of nested [transaction] methods */
+#ifdef SQLITE_TEST
+  int bLegacyPrepare;        /* True to use sqlite3_prepare() */
+#endif
 };
 
 struct IncrblobChannel {
@@ -429,20 +437,33 @@ static SqlFunc *findSqlFunc(SqliteDb *pDb, const char *zName){
   return pNew;
 }
 
+/*
+** Free a single SqlPreparedStmt object.
+*/
+static void dbFreeStmt(SqlPreparedStmt *pStmt){
+#ifdef SQLITE_TEST
+  if( sqlite3_sql(pStmt->pStmt)==0 ){
+    Tcl_Free((char *)pStmt->zSql);
+  }
+#endif
+  sqlite3_finalize(pStmt->pStmt);
+  Tcl_Free((char *)pStmt);
+}
+
 /*
 ** Finalize and free a list of prepared statements
 */
-static void flushStmtCache( SqliteDb *pDb ){
+static void flushStmtCache(SqliteDb *pDb){
   SqlPreparedStmt *pPreStmt;
+  SqlPreparedStmt *pNext;
 
-  while(  pDb->stmtList ){
-    sqlite3_finalize( pDb->stmtList->pStmt );
-    pPreStmt = pDb->stmtList;
-    pDb->stmtList = pDb->stmtList->pNext;
-    Tcl_Free( (char*)pPreStmt );
+  for(pPreStmt = pDb->stmtList; pPreStmt; pPreStmt=pNext){
+    pNext = pPreStmt->pNext;
+    dbFreeStmt(pPreStmt);
   }
   pDb->nStmt = 0;
   pDb->stmtLast = 0;
+  pDb->stmtList = 0;
 }
 
 /*
@@ -898,7 +919,7 @@ static int auth_callback(
   Tcl_DStringAppendElement(&str, zArg4 ? zArg4 : "");
   rc = Tcl_GlobalEval(pDb->interp, Tcl_DStringValue(&str));
   Tcl_DStringFree(&str);
-  zReply = Tcl_GetStringResult(pDb->interp);
+  zReply = rc==TCL_OK ? Tcl_GetStringResult(pDb->interp) : "SQLITE_DENY";
   if( strcmp(zReply,"SQLITE_OK")==0 ){
     rc = SQLITE_OK;
   }else if( strcmp(zReply,"SQLITE_DENY")==0 ){
@@ -947,14 +968,12 @@ static char *local_getline(char *zPrompt, FILE *in){
   char *zLine;
   int nLine;
   int n;
-  int eol;
 
   nLine = 100;
   zLine = malloc( nLine );
   if( zLine==0 ) return 0;
   n = 0;
-  eol = 0;
-  while( !eol ){
+  while( 1 ){
     if( n+100>nLine ){
       nLine = nLine*2 + 100;
       zLine = realloc(zLine, nLine);
@@ -966,14 +985,13 @@ static char *local_getline(char *zPrompt, FILE *in){
         return 0;
       }
       zLine[n] = 0;
-      eol = 1;
       break;
     }
     while( zLine[n] ){ n++; }
     if( n>0 && zLine[n-1]=='\n' ){
       n--;
       zLine[n] = 0;
-      eol = 1;
+      break;
     }
   }
   zLine = realloc( zLine, n+1 );
@@ -1030,6 +1048,27 @@ static int DbTransPostCmd(
   return rc;
 }
 
+/*
+** Unless SQLITE_TEST is defined, this function is a simple wrapper around
+** sqlite3_prepare_v2(). If SQLITE_TEST is defined, then it uses either
+** sqlite3_prepare_v2() or legacy interface sqlite3_prepare(), depending
+** on whether or not the [db_use_legacy_prepare] command has been used to 
+** configure the connection.
+*/
+static int dbPrepare(
+  SqliteDb *pDb,                  /* Database object */
+  const char *zSql,               /* SQL to compile */
+  sqlite3_stmt **ppStmt,          /* OUT: Prepared statement */
+  const char **pzOut              /* OUT: Pointer to next SQL statement */
+){
+#ifdef SQLITE_TEST
+  if( pDb->bLegacyPrepare ){
+    return sqlite3_prepare(pDb->db, zSql, -1, ppStmt, pzOut);
+  }
+#endif
+  return sqlite3_prepare_v2(pDb->db, zSql, -1, ppStmt, pzOut);
+}
+
 /*
 ** Search the cache for a prepared-statement object that implements the
 ** first SQL statement in the buffer pointed to by parameter zIn. If
@@ -1100,7 +1139,7 @@ static int dbPrepareAndBind(
   if( pPreStmt==0 ){
     int nByte;
 
-    if( SQLITE_OK!=sqlite3_prepare_v2(pDb->db, zSql, -1, &pStmt, pzOut) ){
+    if( SQLITE_OK!=dbPrepare(pDb, zSql, &pStmt, pzOut) ){
       Tcl_SetObjResult(interp, dbTextToObj(sqlite3_errmsg(pDb->db)));
       return TCL_ERROR;
     }
@@ -1127,6 +1166,14 @@ static int dbPrepareAndBind(
     pPreStmt->nSql = (*pzOut - zSql);
     pPreStmt->zSql = sqlite3_sql(pStmt);
     pPreStmt->apParm = (Tcl_Obj **)&pPreStmt[1];
+#ifdef SQLITE_TEST
+    if( pPreStmt->zSql==0 ){
+      char *zCopy = Tcl_Alloc(pPreStmt->nSql + 1);
+      memcpy(zCopy, zSql, pPreStmt->nSql);
+      zCopy[pPreStmt->nSql] = '\0';
+      pPreStmt->zSql = zCopy;
+    }
+#endif
   }
   assert( pPreStmt );
   assert( strlen30(pPreStmt->zSql)==pPreStmt->nSql );
@@ -1180,7 +1227,6 @@ static int dbPrepareAndBind(
   return TCL_OK;
 }
 
-
 /*
 ** Release a statement reference obtained by calling dbPrepareAndBind().
 ** There should be exactly one call to this function for each call to
@@ -1205,8 +1251,7 @@ static void dbReleaseStmt(
 
   if( pDb->maxStmt<=0 || discard ){
     /* If the cache is turned off, deallocated the statement */
-    sqlite3_finalize(pPreStmt->pStmt);
-    Tcl_Free((char *)pPreStmt);
+    dbFreeStmt(pPreStmt);
   }else{
     /* Add the prepared statement to the beginning of the cache list. */
     pPreStmt->pNext = pDb->stmtList;
@@ -1226,11 +1271,11 @@ static void dbReleaseStmt(
     /* If we have too many statement in cache, remove the surplus from 
     ** the end of the cache list.  */
     while( pDb->nStmt>pDb->maxStmt ){
-      sqlite3_finalize(pDb->stmtLast->pStmt);
-      pDb->stmtLast = pDb->stmtLast->pPrev;
-      Tcl_Free((char*)pDb->stmtLast->pNext);
+      SqlPreparedStmt *pLast = pDb->stmtLast;
+      pDb->stmtLast = pLast->pPrev;
       pDb->stmtLast->pNext = 0;
       pDb->nStmt--;
+      dbFreeStmt(pLast);
     }
   }
 }
@@ -1363,9 +1408,12 @@ static void dbEvalRowInfo(
 ** no further rows available. This is similar to SQLITE_DONE.
 */
 static int dbEvalStep(DbEvalContext *p){
+  const char *zPrevSql = 0;       /* Previous value of p->zSql */
+
   while( p->zSql[0] || p->pPreStmt ){
     int rc;
     if( p->pPreStmt==0 ){
+      zPrevSql = (p->zSql==zPrevSql ? 0 : p->zSql);
       rc = dbPrepareAndBind(p->pDb, p->zSql, &p->zSql, &p->pPreStmt);
       if( rc!=TCL_OK ) return rc;
     }else{
@@ -1392,8 +1440,19 @@ static int dbEvalStep(DbEvalContext *p){
       if( rcs!=SQLITE_OK ){
         /* If a run-time error occurs, report the error and stop reading
         ** the SQL.  */
-        Tcl_SetObjResult(pDb->interp, dbTextToObj(sqlite3_errmsg(pDb->db)));
         dbReleaseStmt(pDb, pPreStmt, 1);
+#if SQLITE_TEST
+        if( p->pDb->bLegacyPrepare && rcs==SQLITE_SCHEMA && zPrevSql ){
+          /* If the runtime error was an SQLITE_SCHEMA, and the database
+          ** handle is configured to use the legacy sqlite3_prepare() 
+          ** interface, retry prepare()/step() on the same SQL statement.
+          ** This only happens once. If there is a second SQLITE_SCHEMA
+          ** error, the error will be returned to the caller. */
+          p->zSql = zPrevSql;
+          continue;
+        }
+#endif
+        Tcl_SetObjResult(pDb->interp, dbTextToObj(sqlite3_errmsg(pDb->db)));
         return TCL_ERROR;
       }else{
         dbReleaseStmt(pDb, pPreStmt, 0);
@@ -2059,7 +2118,6 @@ static int DbObjCmd(void *cd, Tcl_Interp *interp, int objc,Tcl_Obj *const*objv){
     zCommit = "COMMIT";
     while( (zLine = local_getline(0, in))!=0 ){
       char *z;
-      i = 0;
       lineno++;
       azCol[0] = zLine;
       for(i=0, z=zLine; *z; z++){
@@ -2180,6 +2238,8 @@ static int DbObjCmd(void *cd, Tcl_Interp *interp, int objc,Tcl_Obj *const*objv){
     if( choice==DB_ONECOLUMN ){
       if( rc==TCL_OK ){
         Tcl_SetObjResult(interp, dbEvalColumnValue(&sEval, 0));
+      }else if( rc==TCL_BREAK ){
+        Tcl_ResetResult(interp);
       }
     }else if( rc==TCL_BREAK || rc==TCL_OK ){
       Tcl_SetObjResult(interp, Tcl_NewBooleanObj(rc==TCL_OK));
@@ -2486,14 +2546,16 @@ static int DbObjCmd(void *cd, Tcl_Interp *interp, int objc,Tcl_Obj *const*objv){
   ** Change the encryption key on the currently open database.
   */
   case DB_REKEY: {
+#ifdef SQLITE_HAS_CODEC
     int nKey;
     void *pKey;
+#endif
     if( objc!=3 ){
       Tcl_WrongNumArgs(interp, 2, objv, "KEY");
       return TCL_ERROR;
     }
-    pKey = Tcl_GetByteArrayFromObj(objv[2], &nKey);
 #ifdef SQLITE_HAS_CODEC
+    pKey = Tcl_GetByteArrayFromObj(objv[2], &nKey);
     rc = sqlite3_rekey(pDb->db, pKey, nKey);
     if( rc ){
       Tcl_AppendResult(interp, sqlite3ErrStr(rc), 0);
@@ -2856,8 +2918,6 @@ static int DbObjCmdAdaptor(
 */
 static int DbMain(void *cd, Tcl_Interp *interp, int objc,Tcl_Obj *const*objv){
   SqliteDb *p;
-  void *pKey = 0;
-  int nKey = 0;
   const char *zArg;
   char *zErrMsg;
   int i;
@@ -2865,6 +2925,10 @@ static int DbMain(void *cd, Tcl_Interp *interp, int objc,Tcl_Obj *const*objv){
   const char *zVfs = 0;
   int flags;
   Tcl_DString translatedFilename;
+#ifdef SQLITE_HAS_CODEC
+  void *pKey = 0;
+  int nKey = 0;
+#endif
 
   /* In normal use, each TCL interpreter runs in a single thread.  So
   ** by default, we can turn of mutexing on SQLite database connections.
@@ -2896,7 +2960,9 @@ static int DbMain(void *cd, Tcl_Interp *interp, int objc,Tcl_Obj *const*objv){
   for(i=3; i+1<objc; i+=2){
     zArg = Tcl_GetString(objv[i]);
     if( strcmp(zArg,"-key")==0 ){
+#ifdef SQLITE_HAS_CODEC
       pKey = Tcl_GetByteArrayFromObj(objv[i+1], &nKey);
+#endif
     }else if( strcmp(zArg, "-vfs")==0 ){
       zVfs = Tcl_GetString(objv[i+1]);
     }else if( strcmp(zArg, "-readonly")==0 ){
@@ -2926,7 +2992,7 @@ static int DbMain(void *cd, Tcl_Interp *interp, int objc,Tcl_Obj *const*objv){
       }else{
         flags &= ~SQLITE_OPEN_NOMUTEX;
       }
-   }else if( strcmp(zArg, "-fullmutex")==0 ){
+    }else if( strcmp(zArg, "-fullmutex")==0 ){
       int b;
       if( Tcl_GetBooleanFromObj(interp, objv[i+1], &b) ) return TCL_ERROR;
       if( b ){
@@ -3475,33 +3541,34 @@ int Md5_Register(sqlite3 *db){
 ** the TCL interpreter reads and evaluates that file.
 */
 #if TCLSH==1
-static char zMainloop[] =
-  "set line {}\n"
-  "while {![eof stdin]} {\n"
-    "if {$line!=\"\"} {\n"
-      "puts -nonewline \"> \"\n"
-    "} else {\n"
-      "puts -nonewline \"% \"\n"
-    "}\n"
-    "flush stdout\n"
-    "append line [gets stdin]\n"
-    "if {[info complete $line]} {\n"
-      "if {[catch {uplevel #0 $line} result]} {\n"
-        "puts stderr \"Error: $result\"\n"
-      "} elseif {$result!=\"\"} {\n"
-        "puts $result\n"
+static const char *tclsh_main_loop(void){
+  static const char zMainloop[] =
+    "set line {}\n"
+    "while {![eof stdin]} {\n"
+      "if {$line!=\"\"} {\n"
+        "puts -nonewline \"> \"\n"
+      "} else {\n"
+        "puts -nonewline \"% \"\n"
+      "}\n"
+      "flush stdout\n"
+      "append line [gets stdin]\n"
+      "if {[info complete $line]} {\n"
+        "if {[catch {uplevel #0 $line} result]} {\n"
+          "puts stderr \"Error: $result\"\n"
+        "} elseif {$result!=\"\"} {\n"
+          "puts $result\n"
+        "}\n"
+        "set line {}\n"
+      "} else {\n"
+        "append line \\n\n"
       "}\n"
-      "set line {}\n"
-    "} else {\n"
-      "append line \\n\n"
     "}\n"
-  "}\n"
-;
+  ;
+  return zMainloop;
+}
 #endif
 #if TCLSH==2
-static char zMainloop[] = 
-#include "spaceanal_tcl.h"
-;
+static const char *tclsh_main_loop(void);
 #endif
 
 #ifdef SQLITE_TEST
@@ -3527,6 +3594,44 @@ static int init_all_cmd(
   init_all(slave);
   return TCL_OK;
 }
+
+/*
+** Tclcmd: db_use_legacy_prepare DB BOOLEAN
+**
+**   The first argument to this command must be a database command created by
+**   [sqlite3]. If the second argument is true, then the handle is configured
+**   to use the sqlite3_prepare_v2() function to prepare statements. If it
+**   is false, sqlite3_prepare().
+*/
+static int db_use_legacy_prepare_cmd(
+  ClientData cd,
+  Tcl_Interp *interp,
+  int objc,
+  Tcl_Obj *CONST objv[]
+){
+  Tcl_CmdInfo cmdInfo;
+  SqliteDb *pDb;
+  int bPrepare;
+
+  if( objc!=3 ){
+    Tcl_WrongNumArgs(interp, 1, objv, "DB BOOLEAN");
+    return TCL_ERROR;
+  }
+
+  if( !Tcl_GetCommandInfo(interp, Tcl_GetString(objv[1]), &cmdInfo) ){
+    Tcl_AppendResult(interp, "no such db: ", Tcl_GetString(objv[1]), (char*)0);
+    return TCL_ERROR;
+  }
+  pDb = (SqliteDb*)cmdInfo.objClientData;
+  if( Tcl_GetBooleanFromObj(interp, objv[2], &bPrepare) ){
+    return TCL_ERROR;
+  }
+
+  pDb->bLegacyPrepare = bPrepare;
+
+  Tcl_ResetResult(interp);
+  return TCL_OK;
+}
 #endif
 
 /*
@@ -3547,6 +3652,17 @@ static void init_all(Tcl_Interp *interp){
   Md5_Init(interp);
 #endif
 
+  /* Install the [register_dbstat_vtab] command to access the implementation
+  ** of virtual table dbstat (source file test_stat.c). This command is
+  ** required for testfixture and sqlite3_analyzer, but not by the production
+  ** Tcl extension.  */
+#if defined(SQLITE_TEST) || TCLSH==2
+  {
+    extern int SqlitetestStat_Init(Tcl_Interp*);
+    SqlitetestStat_Init(interp);
+  }
+#endif
+
 #ifdef SQLITE_TEST
   {
     extern int Sqliteconfig_Init(Tcl_Interp*);
@@ -3576,7 +3692,6 @@ static void init_all(Tcl_Interp *interp){
     extern int Sqlitetestbackup_Init(Tcl_Interp*);
     extern int Sqlitetestintarray_Init(Tcl_Interp*);
     extern int Sqlitetestvfs_Init(Tcl_Interp *);
-    extern int SqlitetestStat_Init(Tcl_Interp*);
     extern int Sqlitetestrtree_Init(Tcl_Interp*);
     extern int Sqlitequota_Init(Tcl_Interp*);
     extern int Sqlitemultiplex_Init(Tcl_Interp*);
@@ -3620,7 +3735,6 @@ static void init_all(Tcl_Interp *interp){
     Sqlitetestbackup_Init(interp);
     Sqlitetestintarray_Init(interp);
     Sqlitetestvfs_Init(interp);
-    SqlitetestStat_Init(interp);
     Sqlitetestrtree_Init(interp);
     Sqlitequota_Init(interp);
     Sqlitemultiplex_Init(interp);
@@ -3633,7 +3747,12 @@ static void init_all(Tcl_Interp *interp){
     Sqlitetestfts3_Init(interp);
 #endif
 
-    Tcl_CreateObjCommand(interp,"load_testfixture_extensions",init_all_cmd,0,0);
+    Tcl_CreateObjCommand(
+        interp, "load_testfixture_extensions", init_all_cmd, 0, 0
+    );
+    Tcl_CreateObjCommand(
+        interp, "db_use_legacy_prepare", db_use_legacy_prepare_cmd, 0, 0
+    );
 
 #ifdef SQLITE_SSE
     Sqlitetestsse_Init(interp);
@@ -3651,12 +3770,13 @@ int TCLSH_MAIN(int argc, char **argv){
   ** sqlite3_initialize() is. */
   sqlite3_shutdown();
 
+  Tcl_FindExecutable(argv[0]);
+  interp = Tcl_CreateInterp();
+
 #if TCLSH==2
   sqlite3_config(SQLITE_CONFIG_SINGLETHREAD);
 #endif
-  Tcl_FindExecutable(argv[0]);
 
-  interp = Tcl_CreateInterp();
   init_all(interp);
   if( argc>=2 ){
     int i;
@@ -3677,7 +3797,7 @@ int TCLSH_MAIN(int argc, char **argv){
     }
   }
   if( TCLSH==2 || argc<=1 ){
-    Tcl_GlobalEval(interp, zMainloop);
+    Tcl_GlobalEval(interp, tclsh_main_loop());
   }
   return 0;
 }
diff --git a/src/test1.c b/src/test1.c
index 7fdf54b1..26342522 100644
--- a/src/test1.c
+++ b/src/test1.c
@@ -4395,7 +4395,7 @@ static u8 *sqlite3_stack_baseline = 0;
 static void prepStack(void){
   int i;
   u32 bigBuf[65536];
-  for(i=0; i<sizeof(bigBuf); i++) bigBuf[i] = 0xdeadbeef;
+  for(i=0; i<sizeof(bigBuf)/sizeof(bigBuf[0]); i++) bigBuf[i] = 0xdeadbeef;
   sqlite3_stack_baseline = (u8*)&bigBuf[65536];
 }
 
@@ -4991,9 +4991,8 @@ static int file_control_chunksize_test(
 /*
 ** tclcmd:   file_control_sizehint_test DB DBNAME SIZE
 **
-** This TCL command runs the sqlite3_file_control interface and
-** verifies correct operation of the SQLITE_GET_LOCKPROXYFILE and
-** SQLITE_SET_LOCKPROXYFILE verbs.
+** This TCL command runs the sqlite3_file_control interface 
+** with SQLITE_FCNTL_SIZE_HINT
 */
 static int file_control_sizehint_test(
   ClientData clientData, /* Pointer to sqlite3_enable_XXX function */
@@ -5096,6 +5095,71 @@ static int file_control_lockproxy_test(
   return TCL_OK;  
 }
 
+/*
+** tclcmd:   file_control_win32_av_retry DB  NRETRY  DELAY
+**
+** This TCL command runs the sqlite3_file_control interface with
+** the SQLITE_FCNTL_WIN32_AV_RETRY opcode.
+*/
+static int file_control_win32_av_retry(
+  ClientData clientData, /* Pointer to sqlite3_enable_XXX function */
+  Tcl_Interp *interp,    /* The TCL interpreter that invoked this command */
+  int objc,              /* Number of arguments */
+  Tcl_Obj *CONST objv[]  /* Command arguments */
+){
+  sqlite3 *db;
+  int rc;
+  int a[2];
+  char z[100];
+
+  if( objc!=4 ){
+    Tcl_AppendResult(interp, "wrong # args: should be \"",
+        Tcl_GetStringFromObj(objv[0], 0), " DB NRETRY DELAY", 0);
+    return TCL_ERROR;
+  }
+  if( getDbPointer(interp, Tcl_GetString(objv[1]), &db) ){
+    return TCL_ERROR;
+  }
+  if( Tcl_GetIntFromObj(interp, objv[2], &a[0]) ) return TCL_ERROR;
+  if( Tcl_GetIntFromObj(interp, objv[3], &a[1]) ) return TCL_ERROR;
+  rc = sqlite3_file_control(db, NULL, SQLITE_FCNTL_WIN32_AV_RETRY, (void*)a);
+  sqlite3_snprintf(sizeof(z), z, "%d %d %d", rc, a[0], a[1]);
+  Tcl_AppendResult(interp, z, (char*)0);
+  return TCL_OK;  
+}
+
+/*
+** tclcmd:   file_control_persist_wal DB PERSIST-FLAG
+**
+** This TCL command runs the sqlite3_file_control interface with
+** the SQLITE_FCNTL_PERSIST_WAL opcode.
+*/
+static int file_control_persist_wal(
+  ClientData clientData, /* Pointer to sqlite3_enable_XXX function */
+  Tcl_Interp *interp,    /* The TCL interpreter that invoked this command */
+  int objc,              /* Number of arguments */
+  Tcl_Obj *CONST objv[]  /* Command arguments */
+){
+  sqlite3 *db;
+  int rc;
+  int bPersist;
+  char z[100];
+
+  if( objc!=3 ){
+    Tcl_AppendResult(interp, "wrong # args: should be \"",
+        Tcl_GetStringFromObj(objv[0], 0), " DB FLAG", 0);
+    return TCL_ERROR;
+  }
+  if( getDbPointer(interp, Tcl_GetString(objv[1]), &db) ){
+    return TCL_ERROR;
+  }
+  if( Tcl_GetIntFromObj(interp, objv[2], &bPersist) ) return TCL_ERROR;
+  rc = sqlite3_file_control(db, NULL, SQLITE_FCNTL_PERSIST_WAL, (void*)&bPersist);
+  sqlite3_snprintf(sizeof(z), z, "%d %d", rc, bPersist);
+  Tcl_AppendResult(interp, z, (char*)0);
+  return TCL_OK;  
+}
+
 
 /*
 ** tclcmd:   sqlite3_vfs_list
@@ -5574,6 +5638,116 @@ static int test_test_control(
   return TCL_OK;
 }
 
+#if SQLITE_OS_WIN
+/*
+** Information passed from the main thread into the windows file locker
+** background thread.
+*/
+struct win32FileLocker {
+  char *evName;       /* Name of event to signal thread startup */
+  HANDLE h;           /* Handle of the file to be locked */
+  int delay1;         /* Delay before locking */
+  int delay2;         /* Delay before unlocking */
+  int ok;             /* Finished ok */
+  int err;            /* True if an error occurs */
+};
+#endif
+
+
+#if SQLITE_OS_WIN
+/*
+** The background thread that does file locking.
+*/
+static void win32_file_locker(void *pAppData){
+  struct win32FileLocker *p = (struct win32FileLocker*)pAppData;
+  if( p->evName ){
+    HANDLE ev = OpenEvent(EVENT_MODIFY_STATE, FALSE, p->evName);
+    if ( ev ){
+      SetEvent(ev);
+      CloseHandle(ev);
+    }
+  }
+  if( p->delay1 ) Sleep(p->delay1);
+  if( LockFile(p->h, 0, 0, 100000000, 0) ){
+    Sleep(p->delay2);
+    UnlockFile(p->h, 0, 0, 100000000, 0);
+    p->ok = 1;
+  }else{
+    p->err = 1;
+  }
+  CloseHandle(p->h);
+  p->h = 0;
+  p->delay1 = 0;
+  p->delay2 = 0;
+}
+#endif
+
+#if SQLITE_OS_WIN
+/*
+**      lock_win32_file FILENAME DELAY1 DELAY2
+**
+** Get an exclusive manditory lock on file for DELAY2 milliseconds.
+** Wait DELAY1 milliseconds before acquiring the lock.
+*/
+static int win32_file_lock(
+  void * clientData,
+  Tcl_Interp *interp,
+  int objc,
+  Tcl_Obj *CONST objv[]
+){
+  static struct win32FileLocker x = { "win32_file_lock", 0, 0, 0, 0, 0 };
+  const char *zFilename;
+  char zBuf[200];
+  int retry = 0;
+  HANDLE ev;
+  DWORD wResult;
+  
+  if( objc!=4 && objc!=1 ){
+    Tcl_WrongNumArgs(interp, 1, objv, "FILENAME DELAY1 DELAY2");
+    return TCL_ERROR;
+  }
+  if( objc==1 ){
+    sqlite3_snprintf(sizeof(zBuf), zBuf, "%d %d %d %d %d",
+                     x.ok, x.err, x.delay1, x.delay2, x.h);
+    Tcl_AppendResult(interp, zBuf, (char*)0);
+    return TCL_OK;
+  }
+  while( x.h && retry<30 ){
+    retry++;
+    Sleep(100);
+  }
+  if( x.h ){
+    Tcl_AppendResult(interp, "busy", (char*)0);
+    return TCL_ERROR;
+  }
+  if( Tcl_GetIntFromObj(interp, objv[2], &x.delay1) ) return TCL_ERROR;
+  if( Tcl_GetIntFromObj(interp, objv[3], &x.delay2) ) return TCL_ERROR;
+  zFilename = Tcl_GetString(objv[1]);
+  x.h = CreateFile(zFilename, GENERIC_READ|GENERIC_WRITE,
+              FILE_SHARE_READ|FILE_SHARE_WRITE, 0, OPEN_ALWAYS,
+              FILE_ATTRIBUTE_NORMAL, 0);
+  if( !x.h ){
+    Tcl_AppendResult(interp, "cannot open file: ", zFilename, (char*)0);
+    return TCL_ERROR;
+  }
+  ev = CreateEvent(NULL, TRUE, FALSE, x.evName);
+  if ( !ev ){
+    Tcl_AppendResult(interp, "cannot create event: ", x.evName, (char*)0);
+    return TCL_ERROR;
+  }
+  _beginthread(win32_file_locker, 0, (void*)&x);
+  Sleep(0);
+  if ( (wResult = WaitForSingleObject(ev, 10000))!=WAIT_OBJECT_0 ){
+    sqlite3_snprintf(sizeof(zBuf), zBuf, "0x%x", wResult);
+    Tcl_AppendResult(interp, "wait failed: ", zBuf, (char*)0);
+    CloseHandle(ev);
+    return TCL_ERROR;
+  }
+  CloseHandle(ev);
+  return TCL_OK;
+}
+#endif
+
 
 /*
 **      optimization_control DB OPT BOOLEAN
@@ -5754,6 +5928,9 @@ int Sqlitetest1_Init(Tcl_Interp *interp){
      { "restore_prng_state",            restore_prng_state, 0 },
      { "reset_prng_state",              reset_prng_state,   0 },
      { "optimization_control",          optimization_control,0},
+#if SQLITE_OS_WIN
+     { "lock_win32_file",               win32_file_lock,    0 },
+#endif
      { "tcl_objproc",                   runAsObjProc,       0 },
 
      /* sqlite3_column_*() API */
@@ -5802,7 +5979,9 @@ int Sqlitetest1_Init(Tcl_Interp *interp){
      { "file_control_lasterrno_test", file_control_lasterrno_test,  0   },
      { "file_control_lockproxy_test", file_control_lockproxy_test,  0   },
      { "file_control_chunksize_test", file_control_chunksize_test,  0   },
-     { "file_control_sizehint_test", file_control_sizehint_test,  0   },
+     { "file_control_sizehint_test",  file_control_sizehint_test,   0   },
+     { "file_control_win32_av_retry", file_control_win32_av_retry,  0   },
+     { "file_control_persist_wal",    file_control_persist_wal,     0   },
      { "sqlite3_vfs_list",           vfs_list,     0   },
      { "sqlite3_create_function_v2", test_create_function_v2, 0 },
 
diff --git a/src/test6.c b/src/test6.c
index c9c8a4d2..23fb14c5 100644
--- a/src/test6.c
+++ b/src/test6.c
@@ -505,6 +505,16 @@ static int cfCheckReservedLock(sqlite3_file *pFile, int *pResOut){
   return sqlite3OsCheckReservedLock(((CrashFile *)pFile)->pRealFile, pResOut);
 }
 static int cfFileControl(sqlite3_file *pFile, int op, void *pArg){
+  if( op==SQLITE_FCNTL_SIZE_HINT ){
+    CrashFile *pCrash = (CrashFile *)pFile;
+    i64 nByte = *(i64 *)pArg;
+    if( nByte>pCrash->iSize ){
+      if( SQLITE_OK==writeListAppend(pFile, nByte, 0, 0) ){
+        pCrash->iSize = nByte;
+      }
+    }
+    return SQLITE_OK;
+  }
   return sqlite3OsFileControl(((CrashFile *)pFile)->pRealFile, op, pArg);
 }
 
diff --git a/src/test8.c b/src/test8.c
index b3e6058a..283d790b 100644
--- a/src/test8.c
+++ b/src/test8.c
@@ -1232,12 +1232,50 @@ static int echoRename(sqlite3_vtab *vtab, const char *zNewName){
   return rc;
 }
 
+static int echoSavepoint(sqlite3_vtab *pVTab, int iSavepoint){
+  assert( pVTab );
+  return SQLITE_OK;
+}
+
+static int echoRelease(sqlite3_vtab *pVTab, int iSavepoint){
+  assert( pVTab );
+  return SQLITE_OK;
+}
+
+static int echoRollbackTo(sqlite3_vtab *pVTab, int iSavepoint){
+  assert( pVTab );
+  return SQLITE_OK;
+}
+
 /*
 ** A virtual table module that merely "echos" the contents of another
 ** table (like an SQL VIEW).
 */
 static sqlite3_module echoModule = {
-  0,                         /* iVersion */
+  1,                         /* iVersion */
+  echoCreate,
+  echoConnect,
+  echoBestIndex,
+  echoDisconnect, 
+  echoDestroy,
+  echoOpen,                  /* xOpen - open a cursor */
+  echoClose,                 /* xClose - close a cursor */
+  echoFilter,                /* xFilter - configure scan constraints */
+  echoNext,                  /* xNext - advance a cursor */
+  echoEof,                   /* xEof */
+  echoColumn,                /* xColumn - read data */
+  echoRowid,                 /* xRowid - read data */
+  echoUpdate,                /* xUpdate - write data */
+  echoBegin,                 /* xBegin - begin transaction */
+  echoSync,                  /* xSync - sync transaction */
+  echoCommit,                /* xCommit - commit transaction */
+  echoRollback,              /* xRollback - rollback transaction */
+  echoFindFunction,          /* xFindFunction - function overloading */
+  echoRename                 /* xRename - rename the table */
+};
+
+static sqlite3_module echoModuleV2 = {
+  2,                         /* iVersion */
   echoCreate,
   echoConnect,
   echoBestIndex,
@@ -1257,6 +1295,9 @@ static sqlite3_module echoModule = {
   echoRollback,              /* xRollback - rollback transaction */
   echoFindFunction,          /* xFindFunction - function overloading */
   echoRename,                /* xRename - rename the table */
+  echoSavepoint,
+  echoRelease,
+  echoRollbackTo
 };
 
 /*
@@ -1284,9 +1325,18 @@ static int register_echo_module(
     return TCL_ERROR;
   }
   if( getDbPointer(interp, Tcl_GetString(objv[1]), &db) ) return TCL_ERROR;
+
+  /* Virtual table module "echo" */
   pMod = sqlite3_malloc(sizeof(EchoModule));
   pMod->interp = interp;
   sqlite3_create_module_v2(db, "echo", &echoModule, (void*)pMod, moduleDestroy);
+
+  /* Virtual table module "echo_v2" */
+  pMod = sqlite3_malloc(sizeof(EchoModule));
+  pMod->interp = interp;
+  sqlite3_create_module_v2(db, "echo_v2", 
+      &echoModuleV2, (void*)pMod, moduleDestroy
+  );
   return TCL_OK;
 }
 
diff --git a/src/test_config.c b/src/test_config.c
index a2796c77..ce72f873 100644
--- a/src/test_config.c
+++ b/src/test_config.c
@@ -55,6 +55,12 @@ static void set_options(Tcl_Interp *interp){
   Tcl_SetVar2(interp, "sqlite_options", "debug", "0", TCL_GLOBAL_ONLY);
 #endif
 
+#ifdef SQLITE_DIRECT_OVERFLOW_READ
+  Tcl_SetVar2(interp, "sqlite_options", "direct_read", "1", TCL_GLOBAL_ONLY);
+#else
+  Tcl_SetVar2(interp, "sqlite_options", "direct_read", "0", TCL_GLOBAL_ONLY);
+#endif
+
 #ifdef SQLITE_DISABLE_DIRSYNC
   Tcl_SetVar2(interp, "sqlite_options", "dirsync", "0", TCL_GLOBAL_ONLY);
 #else
@@ -363,6 +369,12 @@ Tcl_SetVar2(interp, "sqlite_options", "long_double",
   Tcl_SetVar2(interp, "sqlite_options", "memorymanage", "0", TCL_GLOBAL_ONLY);
 #endif
 
+#ifdef SQLITE_OMIT_MERGE_SORT
+  Tcl_SetVar2(interp, "sqlite_options", "mergesort", "0", TCL_GLOBAL_ONLY);
+#else
+  Tcl_SetVar2(interp, "sqlite_options", "mergesort", "1", TCL_GLOBAL_ONLY);
+#endif
+
 #ifdef SQLITE_OMIT_OR_OPTIMIZATION
   Tcl_SetVar2(interp, "sqlite_options", "or_opt", "0", TCL_GLOBAL_ONLY);
 #else
@@ -412,10 +424,10 @@ Tcl_SetVar2(interp, "sqlite_options", "long_double",
   Tcl_SetVar2(interp, "sqlite_options", "schema_version", "1", TCL_GLOBAL_ONLY);
 #endif
 
-#ifdef SQLITE_ENABLE_STAT2
-  Tcl_SetVar2(interp, "sqlite_options", "stat2", "1", TCL_GLOBAL_ONLY);
+#ifdef SQLITE_ENABLE_STAT3
+  Tcl_SetVar2(interp, "sqlite_options", "stat3", "1", TCL_GLOBAL_ONLY);
 #else
-  Tcl_SetVar2(interp, "sqlite_options", "stat2", "0", TCL_GLOBAL_ONLY);
+  Tcl_SetVar2(interp, "sqlite_options", "stat3", "0", TCL_GLOBAL_ONLY);
 #endif
 
 #if !defined(SQLITE_ENABLE_LOCKING_STYLE)
@@ -571,6 +583,7 @@ Tcl_SetVar2(interp, "sqlite_options", "long_double",
   LINKVAR( DEFAULT_PAGE_SIZE );
   LINKVAR( DEFAULT_FILE_FORMAT );
   LINKVAR( MAX_ATTACHED );
+  LINKVAR( MAX_DEFAULT_PAGE_SIZE );
 
   {
     static const int cv_TEMP_STORE = SQLITE_TEMP_STORE;
diff --git a/src/test_malloc.c b/src/test_malloc.c
index 5023dca4..e955d579 100644
--- a/src/test_malloc.c
+++ b/src/test_malloc.c
@@ -1222,7 +1222,7 @@ static int test_dump_memsys3(
     return TCL_ERROR;
   }
 
-  switch( (int)clientData ){
+  switch( SQLITE_PTR_TO_INT(clientData) ){
     case 3: {
 #ifdef SQLITE_ENABLE_MEMSYS3
       extern void sqlite3Memsys3Dump(const char*);
@@ -1325,11 +1325,13 @@ static int test_db_status(
     { "STMT_USED",           SQLITE_DBSTATUS_STMT_USED           },
     { "LOOKASIDE_HIT",       SQLITE_DBSTATUS_LOOKASIDE_HIT       },
     { "LOOKASIDE_MISS_SIZE", SQLITE_DBSTATUS_LOOKASIDE_MISS_SIZE },
-    { "LOOKASIDE_MISS_FULL", SQLITE_DBSTATUS_LOOKASIDE_MISS_FULL }
+    { "LOOKASIDE_MISS_FULL", SQLITE_DBSTATUS_LOOKASIDE_MISS_FULL },
+    { "CACHE_HIT",           SQLITE_DBSTATUS_CACHE_HIT           },
+    { "CACHE_MISS",          SQLITE_DBSTATUS_CACHE_MISS          }
   };
   Tcl_Obj *pResult;
   if( objc!=4 ){
-    Tcl_WrongNumArgs(interp, 1, objv, "PARAMETER RESETFLAG");
+    Tcl_WrongNumArgs(interp, 1, objv, "DB PARAMETER RESETFLAG");
     return TCL_ERROR;
   }
   if( getDbPointer(interp, Tcl_GetString(objv[1]), &db) ) return TCL_ERROR;
@@ -1460,7 +1462,7 @@ int Sqlitetest_malloc_Init(Tcl_Interp *interp){
   };
   int i;
   for(i=0; i<sizeof(aObjCmd)/sizeof(aObjCmd[0]); i++){
-    ClientData c = (ClientData)aObjCmd[i].clientData;
+    ClientData c = (ClientData)SQLITE_INT_TO_PTR(aObjCmd[i].clientData);
     Tcl_CreateObjCommand(interp, aObjCmd[i].zName, aObjCmd[i].xProc, c, 0);
   }
   return TCL_OK;
diff --git a/src/test_multiplex.c b/src/test_multiplex.c
index f709c9a9..5d29607a 100644
--- a/src/test_multiplex.c
+++ b/src/test_multiplex.c
@@ -39,12 +39,18 @@
 ** URI.
 **
 ** The multiplex VFS allows databases up to 32 GiB in size.  But it splits
-** the files up into 1 GiB pieces, so that they will work even on filesystems
-** that do not support large files.
+** the files up into smaller pieces, so that they will work even on 
+** filesystems that do not support large files.  The default chunk size
+** is 2147418112 bytes (which is 64KiB less than 2GiB) but this can be
+** changed at compile-time by defining the SQLITE_MULTIPLEX_CHUNK_SIZE
+** macro.  Use the "chunksize=NNNN" query parameter with a URI filename
+** in order to select an alternative chunk size for individual connections
+** at run-time.
 */
 #include "sqlite3.h"
 #include <string.h>
 #include <assert.h>
+#include <stdlib.h>
 #include "test_multiplex.h"
 
 #ifndef SQLITE_CORE
@@ -78,20 +84,26 @@
 
 /************************ Shim Definitions ******************************/
 
-#define SQLITE_MULTIPLEX_VFS_NAME "multiplex"
+#ifndef SQLITE_MULTIPLEX_VFS_NAME
+# define SQLITE_MULTIPLEX_VFS_NAME "multiplex"
+#endif
 
 /* This is the limit on the chunk size.  It may be changed by calling
 ** the xFileControl() interface.  It will be rounded up to a 
-** multiple of MAX_PAGE_SIZE.  We default it here to 1GB.
+** multiple of MAX_PAGE_SIZE.  We default it here to 2GiB less 64KiB.
 */
-#define SQLITE_MULTIPLEX_CHUNK_SIZE (MAX_PAGE_SIZE*16384)
+#ifndef SQLITE_MULTIPLEX_CHUNK_SIZE
+# define SQLITE_MULTIPLEX_CHUNK_SIZE 2147418112
+#endif
 
 /* Default limit on number of chunks.  Care should be taken
 ** so that values for chunks numbers fit in the SQLITE_MULTIPLEX_EXT_FMT
 ** format specifier. It may be changed by calling
 ** the xFileControl() interface.
 */
-#define SQLITE_MULTIPLEX_MAX_CHUNKS 32
+#ifndef SQLITE_MULTIPLEX_MAX_CHUNKS
+# define SQLITE_MULTIPLEX_MAX_CHUNKS 32
+#endif
 
 /* If SQLITE_MULTIPLEX_EXT_OVWR is defined, the 
 ** last SQLITE_MULTIPLEX_EXT_SZ characters of the 
@@ -119,13 +131,15 @@ typedef struct multiplexConn multiplexConn;
 ** group.
 */
 struct multiplexGroup {
-  sqlite3_file **pReal;            /* Handles to each chunk */
-  char *bOpen;                     /* array of bools - 0 if chunk not opened */
+  struct multiplexReal {           /* For each chunk */
+    sqlite3_file *p;                  /* Handle for the chunk */
+    char *z;                          /* Name of this chunk */
+  } *aReal;                        /* list of all chunks */
+  int nReal;                       /* Number of chunks */
   char *zName;                     /* Base filename of this group */
   int nName;                       /* Length of base filename */
   int flags;                       /* Flags used for original opening */
-  int nChunkSize;                  /* Chunk size used for this group */
-  int nMaxChunks;                  /* Max number of chunks for this group */
+  unsigned int szChunk;            /* Chunk size used for this group */
   int bEnabled;                    /* TRUE to use Multiplex VFS for this file */
   multiplexGroup *pNext, *pPrev;   /* Doubly linked list of all group objects */
 };
@@ -184,12 +198,6 @@ static struct {
   /* List of multiplexGroup objects.
   */
   multiplexGroup *pGroups;
-
-  /* Storage for temp file names.  Allocated during 
-  ** initialization to the max pathname of the underlying VFS.
-  */
-  char *zName;
-
 } gMultiplex;
 
 /************************* Utility Routines *********************************/
@@ -265,7 +273,8 @@ static int multiplexGetTempname(sqlite3_vfs *pOrigVfs, int nBuf, char *zBuf){
         attempts++;
         sqlite3_randomness(8, &zBuf[j]);
         for(i=0; i<8; i++){
-          zBuf[j+i] = (char)zChars[ ((unsigned char)zBuf[j+i])%(sizeof(zChars)-1) ];
+          unsigned char uc = (unsigned char)zBuf[j+i];
+          zBuf[j+i] = (char)zChars[uc%(sizeof(zChars)-1)];
         }
         memcpy(&zBuf[j+i], ".tmp", 5);
         rc = pOrigVfs->xAccess(pOrigVfs, zBuf, SQLITE_ACCESS_EXISTS, &exists);
@@ -279,35 +288,69 @@ static int multiplexGetTempname(sqlite3_vfs *pOrigVfs, int nBuf, char *zBuf){
   return rc;
 }
 
+/* Compute the filename for the iChunk-th chunk
+*/
+static int multiplexSubFilename(multiplexGroup *pGroup, int iChunk){
+  if( iChunk>=pGroup->nReal ){
+    struct multiplexReal *p;
+    p = sqlite3_realloc(pGroup->aReal, (iChunk+1)*sizeof(*p));
+    if( p==0 ){
+      return SQLITE_NOMEM;
+    }
+    memset(&p[pGroup->nReal], 0, sizeof(p[0])*(iChunk+1-pGroup->nReal));
+    pGroup->aReal = p;
+    pGroup->nReal = iChunk+1;
+  }
+  if( pGroup->aReal[iChunk].z==0 ){
+    char *z;
+    int n = pGroup->nName;
+    pGroup->aReal[iChunk].z = z = sqlite3_malloc( n+3 );
+    if( z==0 ){
+      return SQLITE_NOMEM;
+    }
+    memcpy(z, pGroup->zName, n+1);
+    if( iChunk>0 ){
+#ifdef SQLITE_ENABLE_8_3_NAMES
+      if( n>3 && z[n-3]=='.' ){
+        n--;
+      }else if( n>4 && z[n-4]=='.' ){
+        n -= 2;
+      }
+#endif
+      sqlite3_snprintf(3,&z[n],"%02d",iChunk);
+    }
+  }
+  return SQLITE_OK;
+}
+
 /* Translate an sqlite3_file* that is really a multiplexGroup* into
 ** the sqlite3_file* for the underlying original VFS.
 */
-static sqlite3_file *multiplexSubOpen(multiplexConn *pConn, int iChunk, int *rc, int *pOutFlags){
-  multiplexGroup *pGroup = pConn->pGroup;
+static sqlite3_file *multiplexSubOpen(
+  multiplexGroup *pGroup,
+  int iChunk,
+  int *rc,
+  int *pOutFlags
+){
+  sqlite3_file *pSubOpen = 0;
   sqlite3_vfs *pOrigVfs = gMultiplex.pOrigVfs;        /* Real VFS */
-  if( iChunk<pGroup->nMaxChunks ){
-    sqlite3_file *pSubOpen = pGroup->pReal[iChunk];    /* Real file descriptor */
-    if( !pGroup->bOpen[iChunk] ){
-      memcpy(gMultiplex.zName, pGroup->zName, pGroup->nName+1);
-      if( iChunk ){
-#ifdef SQLITE_MULTIPLEX_EXT_OVWR
-        sqlite3_snprintf(SQLITE_MULTIPLEX_EXT_SZ+1, gMultiplex.zName+pGroup->nName-SQLITE_MULTIPLEX_EXT_SZ, SQLITE_MULTIPLEX_EXT_FMT, iChunk);
-#else
-        sqlite3_snprintf(SQLITE_MULTIPLEX_EXT_SZ+1, gMultiplex.zName+pGroup->nName, SQLITE_MULTIPLEX_EXT_FMT, iChunk);
-#endif
-      }
-      *rc = pOrigVfs->xOpen(pOrigVfs, gMultiplex.zName, pSubOpen, pGroup->flags, pOutFlags);
-      if( *rc==SQLITE_OK ){
-        pGroup->bOpen[iChunk] = -1;
-        return pSubOpen;
-      }
-      return NULL;
+  *rc = multiplexSubFilename(pGroup, iChunk);
+  if( (*rc)==SQLITE_OK && (pSubOpen = pGroup->aReal[iChunk].p)==0 ){
+    pSubOpen = sqlite3_malloc( pOrigVfs->szOsFile );
+    if( pSubOpen==0 ){
+      *rc = SQLITE_NOMEM;
+      return 0;
+    }
+    pGroup->aReal[iChunk].p = pSubOpen;
+    *rc = pOrigVfs->xOpen(pOrigVfs, pGroup->aReal[iChunk].z, pSubOpen,
+                          pGroup->flags, pOutFlags);
+    if( *rc!=SQLITE_OK ){
+      sqlite3_free(pSubOpen);
+      pGroup->aReal[iChunk].p = 0;
+      return 0;
     }
-    *rc = SQLITE_OK;
-    return pSubOpen;
   }
-  *rc = SQLITE_FULL;
-  return NULL;
+  return pSubOpen;
 }
 
 /*
@@ -366,6 +409,36 @@ static int multiplexFuncInit(
   return rc;
 }
 
+/*
+** Close a single sub-file in the connection group.
+*/
+static void multiplexSubClose(
+  multiplexGroup *pGroup,
+  int iChunk,
+  sqlite3_vfs *pOrigVfs
+){
+  sqlite3_file *pSubOpen = pGroup->aReal[iChunk].p;
+  if( pSubOpen ){
+    pSubOpen->pMethods->xClose(pSubOpen);
+    if( pOrigVfs ) pOrigVfs->xDelete(pOrigVfs, pGroup->aReal[iChunk].z, 0);
+    sqlite3_free(pGroup->aReal[iChunk].p);
+  }
+  sqlite3_free(pGroup->aReal[iChunk].z);
+  memset(&pGroup->aReal[iChunk], 0, sizeof(pGroup->aReal[iChunk]));
+}
+
+/*
+** Deallocate memory held by a multiplexGroup
+*/
+static void multiplexFreeComponents(multiplexGroup *pGroup){
+  int i;
+  for(i=0; i<pGroup->nReal; i++){ multiplexSubClose(pGroup, i, 0); }
+  sqlite3_free(pGroup->aReal);
+  pGroup->aReal = 0;
+  pGroup->nReal = 0;
+}
+
+
 /************************* VFS Method Wrappers *****************************/
 
 /*
@@ -382,16 +455,17 @@ static int multiplexOpen(
   int flags,                 /* Flags to control the opening */
   int *pOutFlags             /* Flags showing results of opening */
 ){
-  int rc = SQLITE_OK;                            /* Result code */
-  multiplexConn *pMultiplexOpen;                 /* The new multiplex file descriptor */
-  multiplexGroup *pGroup;                        /* Corresponding multiplexGroup object */
-  sqlite3_file *pSubOpen;                        /* Real file descriptor */
+  int rc = SQLITE_OK;                  /* Result code */
+  multiplexConn *pMultiplexOpen;       /* The new multiplex file descriptor */
+  multiplexGroup *pGroup;              /* Corresponding multiplexGroup object */
+  sqlite3_file *pSubOpen = 0;                    /* Real file descriptor */
   sqlite3_vfs *pOrigVfs = gMultiplex.pOrigVfs;   /* Real VFS */
   int nName;
-  int i;
   int sz;
+  char *zToFree = 0;
 
   UNUSED_PARAMETER(pVfs);
+  memset(pConn, 0, pVfs->szOsFile);
 
   /* We need to create a group structure and manage
   ** access to this group of files.
@@ -405,28 +479,22 @@ static int multiplexOpen(
   ** it.
   */
   if( !zName ){
-    rc = multiplexGetTempname(pOrigVfs, pOrigVfs->mxPathname, gMultiplex.zName);
-    zName = gMultiplex.zName;
+    zName = zToFree = sqlite3_malloc( pOrigVfs->mxPathname + 10 );
+    if( zName==0 ){
+      rc = SQLITE_NOMEM;
+    }else{
+      rc = multiplexGetTempname(pOrigVfs, pOrigVfs->mxPathname, zToFree);
+    }
   }
 
   if( rc==SQLITE_OK ){
     /* allocate space for group */
     nName = multiplexStrlen30(zName);
-    sz = sizeof(multiplexGroup)                                /* multiplexGroup */
-       + (sizeof(sqlite3_file *)*SQLITE_MULTIPLEX_MAX_CHUNKS)  /* pReal[] */
-       + (pOrigVfs->szOsFile*SQLITE_MULTIPLEX_MAX_CHUNKS)      /* *pReal */
-       + SQLITE_MULTIPLEX_MAX_CHUNKS                           /* bOpen[] */
-       + nName + 1;                                            /* zName */
-#ifndef SQLITE_MULTIPLEX_EXT_OVWR
-    sz += SQLITE_MULTIPLEX_EXT_SZ;
-    assert(nName+SQLITE_MULTIPLEX_EXT_SZ < pOrigVfs->mxPathname);
-#else
-    assert(nName >= SQLITE_MULTIPLEX_EXT_SZ);
-    assert(nName < pOrigVfs->mxPathname);
-#endif
+    sz = sizeof(multiplexGroup)                             /* multiplexGroup */
+       + nName + 1;                                         /* zName */
     pGroup = sqlite3_malloc( sz );
     if( pGroup==0 ){
-      rc=SQLITE_NOMEM;
+      rc = SQLITE_NOMEM;
     }
   }
 
@@ -436,32 +504,58 @@ static int multiplexOpen(
     pMultiplexOpen->pGroup = pGroup;
     memset(pGroup, 0, sz);
     pGroup->bEnabled = -1;
-    pGroup->nChunkSize = SQLITE_MULTIPLEX_CHUNK_SIZE;
-    pGroup->nMaxChunks = SQLITE_MULTIPLEX_MAX_CHUNKS;
-    pGroup->pReal = (sqlite3_file **)p;
-    p += (sizeof(sqlite3_file *)*pGroup->nMaxChunks);
-    for(i=0; i<pGroup->nMaxChunks; i++){
-      pGroup->pReal[i] = (sqlite3_file *)p;
-      p += pOrigVfs->szOsFile;
+    pGroup->szChunk = SQLITE_MULTIPLEX_CHUNK_SIZE;
+    if( flags & SQLITE_OPEN_URI ){
+      const char *zChunkSize;
+      zChunkSize = sqlite3_uri_parameter(zName, "chunksize");
+      if( zChunkSize ){
+        unsigned int n = 0;
+        int i;
+        for(i=0; zChunkSize[i]>='0' && zChunkSize[i]<='9'; i++){
+          n = n*10 + zChunkSize[i] - '0';
+        }
+        if( n>0 ){
+          pGroup->szChunk = (n+0xffff)&~0xffff;
+        }else{
+          /* A zero or negative chunksize disabled the multiplexor */
+          pGroup->bEnabled = 0;
+        }
+      }
     }
-    /* bOpen[] vals should all be zero from memset above */
-    pGroup->bOpen = p;
-    p += pGroup->nMaxChunks;
     pGroup->zName = p;
     /* save off base filename, name length, and original open flags  */
     memcpy(pGroup->zName, zName, nName+1);
     pGroup->nName = nName;
     pGroup->flags = flags;
-    pSubOpen = multiplexSubOpen(pMultiplexOpen, 0, &rc, pOutFlags);
+    rc = multiplexSubFilename(pGroup, 1);
+    if( rc==SQLITE_OK ){
+      pSubOpen = multiplexSubOpen(pGroup, 0, &rc, pOutFlags);
+    }
     if( pSubOpen ){
-      /* if this file is already larger than chunk size, disable 
-      ** the multiplex feature.
-      */
+      int exists, rc2, rc3;
       sqlite3_int64 sz;
-      int rc2 = pSubOpen->pMethods->xFileSize(pSubOpen, &sz);
-      if( (rc2==SQLITE_OK) && (sz>pGroup->nChunkSize) ){
-        pGroup->bEnabled = 0;
+
+      rc2 = pSubOpen->pMethods->xFileSize(pSubOpen, &sz);
+      if( rc2==SQLITE_OK ){
+        /* If the first overflow file exists and if the size of the main file
+        ** is different from the chunk size, that means the chunk size is set
+        ** set incorrectly.  So fix it.
+        **
+        ** Or, if the first overflow file does not exist and the main file is
+        ** larger than the chunk size, that means the chunk size is too small.
+        ** But we have no way of determining the intended chunk size, so 
+        ** just disable the multiplexor all togethre.
+        */
+        rc3 = pOrigVfs->xAccess(pOrigVfs, pGroup->aReal[1].z,
+            SQLITE_ACCESS_EXISTS, &exists);
+        if( rc3==SQLITE_OK && exists && sz==(sz&0xffff0000) && sz>0
+            && sz!=pGroup->szChunk ){
+          pGroup->szChunk = sz;
+        }else if( rc3==SQLITE_OK && !exists && sz>pGroup->szChunk ){
+          pGroup->bEnabled = 0;
+        }
       }
+
       if( pSubOpen->pMethods->iVersion==1 ){
         pMultiplexOpen->base.pMethods = &gMultiplex.sIoMethodsV1;
       }else{
@@ -472,17 +566,18 @@ static int multiplexOpen(
       if( gMultiplex.pGroups ) gMultiplex.pGroups->pPrev = pGroup;
       gMultiplex.pGroups = pGroup;
     }else{
+      multiplexFreeComponents(pGroup);
       sqlite3_free(pGroup);
     }
   }
   multiplexLeave();
+  sqlite3_free(zToFree);
   return rc;
 }
 
 /*
 ** This is the xDelete method used for the "multiplex" VFS.
-** It attempts to delete the filename specified, as well
-** as additional files with the SQLITE_MULTIPLEX_EXT_FMT extension.
+** It attempts to delete the filename specified.
 */
 static int multiplexDelete(
   sqlite3_vfs *pVfs,         /* The multiplex VFS */
@@ -490,41 +585,7 @@ static int multiplexDelete(
   int syncDir
 ){
   sqlite3_vfs *pOrigVfs = gMultiplex.pOrigVfs;   /* Real VFS */
-  int rc = SQLITE_OK;
-  int nName = multiplexStrlen30(zName);
-  int i;
-
-  UNUSED_PARAMETER(pVfs);
-
-  multiplexEnter();
-  memcpy(gMultiplex.zName, zName, nName+1);
-  for(i=0; i<SQLITE_MULTIPLEX_MAX_CHUNKS; i++){
-    int rc2;
-    int exists = 0;
-    if( i ){
-#ifdef SQLITE_MULTIPLEX_EXT_OVWR
-        sqlite3_snprintf(SQLITE_MULTIPLEX_EXT_SZ+1, 
-            gMultiplex.zName+nName-SQLITE_MULTIPLEX_EXT_SZ, 
-            SQLITE_MULTIPLEX_EXT_FMT, i);
-#else
-        sqlite3_snprintf(SQLITE_MULTIPLEX_EXT_SZ+1, 
-            gMultiplex.zName+nName, 
-            SQLITE_MULTIPLEX_EXT_FMT, i);
-#endif
-    }
-    rc2 = pOrigVfs->xAccess(pOrigVfs, gMultiplex.zName, 
-        SQLITE_ACCESS_EXISTS, &exists);
-    if( rc2==SQLITE_OK && exists ){
-      /* if it exists, delete it */
-      rc2 = pOrigVfs->xDelete(pOrigVfs, gMultiplex.zName, syncDir);
-      if( rc2!=SQLITE_OK ) rc = rc2;
-    }else{
-      /* stop at first "gap" */
-      break;
-    }
-  }
-  multiplexLeave();
-  return rc;
+  return pOrigVfs->xDelete(pOrigVfs, zName, syncDir);
 }
 
 static int multiplexAccess(sqlite3_vfs *a, const char *b, int c, int *d){
@@ -572,17 +633,8 @@ static int multiplexClose(sqlite3_file *pConn){
   multiplexConn *p = (multiplexConn*)pConn;
   multiplexGroup *pGroup = p->pGroup;
   int rc = SQLITE_OK;
-  int i;
   multiplexEnter();
-  /* close any open handles */
-  for(i=0; i<pGroup->nMaxChunks; i++){
-    if( pGroup->bOpen[i] ){
-      sqlite3_file *pSubOpen = pGroup->pReal[i];
-      int rc2 = pSubOpen->pMethods->xClose(pSubOpen);
-      if( rc2!=SQLITE_OK ) rc = rc2;
-      pGroup->bOpen[i] = 0;
-    }
-  }
+  multiplexFreeComponents(pGroup);
   /* remove from linked list */
   if( pGroup->pNext ) pGroup->pNext->pPrev = pGroup->pPrev;
   if( pGroup->pPrev ){
@@ -610,17 +662,22 @@ static int multiplexRead(
   int rc = SQLITE_OK;
   multiplexEnter();
   if( !pGroup->bEnabled ){
-    sqlite3_file *pSubOpen = multiplexSubOpen(p, 0, &rc, NULL);
-    rc = ( !pSubOpen ) ? SQLITE_IOERR_READ : pSubOpen->pMethods->xRead(pSubOpen, pBuf, iAmt, iOfst);
+    sqlite3_file *pSubOpen = multiplexSubOpen(pGroup, 0, &rc, NULL);
+    if( pSubOpen==0 ){
+      rc = SQLITE_IOERR_READ;
+    }else{
+      rc = pSubOpen->pMethods->xRead(pSubOpen, pBuf, iAmt, iOfst);
+    }
   }else{
     while( iAmt > 0 ){
-      int i = (int)(iOfst / pGroup->nChunkSize);
-      sqlite3_file *pSubOpen = multiplexSubOpen(p, i, &rc, NULL);
+      int i = (int)(iOfst / pGroup->szChunk);
+      sqlite3_file *pSubOpen = multiplexSubOpen(pGroup, i, &rc, NULL);
       if( pSubOpen ){
-        int extra = ((int)(iOfst % pGroup->nChunkSize) + iAmt) - pGroup->nChunkSize;
+        int extra = ((int)(iOfst % pGroup->szChunk) + iAmt) - pGroup->szChunk;
         if( extra<0 ) extra = 0;
         iAmt -= extra;
-        rc = pSubOpen->pMethods->xRead(pSubOpen, pBuf, iAmt, iOfst % pGroup->nChunkSize);
+        rc = pSubOpen->pMethods->xRead(pSubOpen, pBuf, iAmt,
+                                       iOfst % pGroup->szChunk);
         if( rc!=SQLITE_OK ) break;
         pBuf = (char *)pBuf + iAmt;
         iOfst += iAmt;
@@ -650,17 +707,23 @@ static int multiplexWrite(
   int rc = SQLITE_OK;
   multiplexEnter();
   if( !pGroup->bEnabled ){
-    sqlite3_file *pSubOpen = multiplexSubOpen(p, 0, &rc, NULL);
-    rc = ( !pSubOpen ) ? SQLITE_IOERR_WRITE : pSubOpen->pMethods->xWrite(pSubOpen, pBuf, iAmt, iOfst);
+    sqlite3_file *pSubOpen = multiplexSubOpen(pGroup, 0, &rc, NULL);
+    if( pSubOpen==0 ){
+      rc = SQLITE_IOERR_WRITE;
+    }else{
+      rc = pSubOpen->pMethods->xWrite(pSubOpen, pBuf, iAmt, iOfst);
+    }
   }else{
     while( iAmt > 0 ){
-      int i = (int)(iOfst / pGroup->nChunkSize);
-      sqlite3_file *pSubOpen = multiplexSubOpen(p, i, &rc, NULL);
+      int i = (int)(iOfst / pGroup->szChunk);
+      sqlite3_file *pSubOpen = multiplexSubOpen(pGroup, i, &rc, NULL);
       if( pSubOpen ){
-        int extra = ((int)(iOfst % pGroup->nChunkSize) + iAmt) - pGroup->nChunkSize;
+        int extra = ((int)(iOfst % pGroup->szChunk) + iAmt) -
+                    pGroup->szChunk;
         if( extra<0 ) extra = 0;
         iAmt -= extra;
-        rc = pSubOpen->pMethods->xWrite(pSubOpen, pBuf, iAmt, iOfst % pGroup->nChunkSize);
+        rc = pSubOpen->pMethods->xWrite(pSubOpen, pBuf, iAmt,
+                                        iOfst % pGroup->szChunk);
         if( rc!=SQLITE_OK ) break;
         pBuf = (char *)pBuf + iAmt;
         iOfst += iAmt;
@@ -685,38 +748,24 @@ static int multiplexTruncate(sqlite3_file *pConn, sqlite3_int64 size){
   int rc = SQLITE_OK;
   multiplexEnter();
   if( !pGroup->bEnabled ){
-    sqlite3_file *pSubOpen = multiplexSubOpen(p, 0, &rc, NULL);
-    rc = ( !pSubOpen ) ? SQLITE_IOERR_TRUNCATE : pSubOpen->pMethods->xTruncate(pSubOpen, size);
+    sqlite3_file *pSubOpen = multiplexSubOpen(pGroup, 0, &rc, NULL);
+    if( pSubOpen==0 ){
+      rc = SQLITE_IOERR_TRUNCATE;
+    }else{
+      rc = pSubOpen->pMethods->xTruncate(pSubOpen, size);
+    }
   }else{
     int rc2;
     int i;
     sqlite3_file *pSubOpen;
     sqlite3_vfs *pOrigVfs = gMultiplex.pOrigVfs;   /* Real VFS */
-    memcpy(gMultiplex.zName, pGroup->zName, pGroup->nName+1);
     /* delete the chunks above the truncate limit */
-    for(i=(int)(size / pGroup->nChunkSize)+1; i<pGroup->nMaxChunks; i++){
-      /* close any open chunks before deleting them */
-      if( pGroup->bOpen[i] ){
-        pSubOpen = pGroup->pReal[i];
-        rc2 = pSubOpen->pMethods->xClose(pSubOpen);
-        if( rc2!=SQLITE_OK ) rc = SQLITE_IOERR_TRUNCATE;
-        pGroup->bOpen[i] = 0;
-      }
-#ifdef SQLITE_MULTIPLEX_EXT_OVWR
-      sqlite3_snprintf(SQLITE_MULTIPLEX_EXT_SZ+1, 
-          gMultiplex.zName+pGroup->nName-SQLITE_MULTIPLEX_EXT_SZ, 
-          SQLITE_MULTIPLEX_EXT_FMT, i);
-#else
-      sqlite3_snprintf(SQLITE_MULTIPLEX_EXT_SZ+1, 
-          gMultiplex.zName+pGroup->nName, 
-          SQLITE_MULTIPLEX_EXT_FMT, i);
-#endif
-      rc2 = pOrigVfs->xDelete(pOrigVfs, gMultiplex.zName, 0);
-      if( rc2!=SQLITE_OK ) rc = SQLITE_IOERR_TRUNCATE;
+    for(i=(int)(size / pGroup->szChunk)+1; i<pGroup->nReal; i++){
+      multiplexSubClose(pGroup, i, pOrigVfs);
     }
-    pSubOpen = multiplexSubOpen(p, (int)(size / pGroup->nChunkSize), &rc2, NULL);
+    pSubOpen = multiplexSubOpen(pGroup, (int)(size/pGroup->szChunk), &rc2,0);
     if( pSubOpen ){
-      rc2 = pSubOpen->pMethods->xTruncate(pSubOpen, size % pGroup->nChunkSize);
+      rc2 = pSubOpen->pMethods->xTruncate(pSubOpen, size % pGroup->szChunk);
       if( rc2!=SQLITE_OK ) rc = rc2;
     }else{
       rc = SQLITE_IOERR_TRUNCATE;
@@ -734,10 +783,9 @@ static int multiplexSync(sqlite3_file *pConn, int flags){
   int rc = SQLITE_OK;
   int i;
   multiplexEnter();
-  for(i=0; i<pGroup->nMaxChunks; i++){
-    /* if we don't have it open, we don't need to sync it */
-    if( pGroup->bOpen[i] ){
-      sqlite3_file *pSubOpen = pGroup->pReal[i];
+  for(i=0; i<pGroup->nReal; i++){
+    sqlite3_file *pSubOpen = pGroup->aReal[i].p;
+    if( pSubOpen ){
       int rc2 = pSubOpen->pMethods->xSync(pSubOpen, flags);
       if( rc2!=SQLITE_OK ) rc = rc2;
     }
@@ -757,39 +805,28 @@ static int multiplexFileSize(sqlite3_file *pConn, sqlite3_int64 *pSize){
   int i;
   multiplexEnter();
   if( !pGroup->bEnabled ){
-    sqlite3_file *pSubOpen = multiplexSubOpen(p, 0, &rc, NULL);
-    rc = ( !pSubOpen ) ? SQLITE_IOERR_FSTAT : pSubOpen->pMethods->xFileSize(pSubOpen, pSize);
+    sqlite3_file *pSubOpen = multiplexSubOpen(pGroup, 0, &rc, NULL);
+    if( pSubOpen==0 ){
+      rc = SQLITE_IOERR_FSTAT;
+    }else{
+      rc = pSubOpen->pMethods->xFileSize(pSubOpen, pSize);
+    }
   }else{
+    sqlite3_vfs *pOrigVfs = gMultiplex.pOrigVfs;
     *pSize = 0;
-    for(i=0; i<pGroup->nMaxChunks; i++){
-      sqlite3_file *pSubOpen = NULL;
-      /* if not opened already, check to see if the chunk exists */
-      if( pGroup->bOpen[i] ){
-        pSubOpen = pGroup->pReal[i];
+    for(i=0; 1; i++){
+      sqlite3_file *pSubOpen = 0;
+      int exists = 0;
+      rc = multiplexSubFilename(pGroup, i);
+      if( rc ) break;
+      rc2 = pOrigVfs->xAccess(pOrigVfs, pGroup->aReal[i].z,
+          SQLITE_ACCESS_EXISTS, &exists);
+      if( rc2==SQLITE_OK && exists){
+        /* if it exists, open it */
+        pSubOpen = multiplexSubOpen(pGroup, i, &rc, NULL);
       }else{
-        sqlite3_vfs *pOrigVfs = gMultiplex.pOrigVfs;   /* Real VFS */
-        int exists = 0;
-        memcpy(gMultiplex.zName, pGroup->zName, pGroup->nName+1);
-        if( i ){
-#ifdef SQLITE_MULTIPLEX_EXT_OVWR
-          sqlite3_snprintf(SQLITE_MULTIPLEX_EXT_SZ+1, 
-              gMultiplex.zName+pGroup->nName-SQLITE_MULTIPLEX_EXT_SZ, 
-              SQLITE_MULTIPLEX_EXT_FMT, i);
-#else
-          sqlite3_snprintf(SQLITE_MULTIPLEX_EXT_SZ+1, 
-              gMultiplex.zName+pGroup->nName, 
-              SQLITE_MULTIPLEX_EXT_FMT, i);
-#endif
-        }
-        rc2 = pOrigVfs->xAccess(pOrigVfs, gMultiplex.zName, 
-            SQLITE_ACCESS_EXISTS, &exists);
-        if( rc2==SQLITE_OK && exists){
-          /* if it exists, open it */
-          pSubOpen = multiplexSubOpen(p, i, &rc, NULL);
-        }else{
-          /* stop at first "gap" */
-          break;
-        }
+        /* stop at first "gap" */
+        break;
       }
       if( pSubOpen ){
         sqlite3_int64 sz;
@@ -797,7 +834,7 @@ static int multiplexFileSize(sqlite3_file *pConn, sqlite3_int64 *pSize){
         if( rc2!=SQLITE_OK ){
           rc = rc2;
         }else{
-          if( sz>pGroup->nChunkSize ){
+          if( sz>pGroup->szChunk ){
             rc = SQLITE_IOERR_FSTAT;
           }
           *pSize += sz;
@@ -816,7 +853,7 @@ static int multiplexFileSize(sqlite3_file *pConn, sqlite3_int64 *pSize){
 static int multiplexLock(sqlite3_file *pConn, int lock){
   multiplexConn *p = (multiplexConn*)pConn;
   int rc;
-  sqlite3_file *pSubOpen = multiplexSubOpen(p, 0, &rc, NULL);
+  sqlite3_file *pSubOpen = multiplexSubOpen(p->pGroup, 0, &rc, NULL);
   if( pSubOpen ){
     return pSubOpen->pMethods->xLock(pSubOpen, lock);
   }
@@ -828,7 +865,7 @@ static int multiplexLock(sqlite3_file *pConn, int lock){
 static int multiplexUnlock(sqlite3_file *pConn, int lock){
   multiplexConn *p = (multiplexConn*)pConn;
   int rc;
-  sqlite3_file *pSubOpen = multiplexSubOpen(p, 0, &rc, NULL);
+  sqlite3_file *pSubOpen = multiplexSubOpen(p->pGroup, 0, &rc, NULL);
   if( pSubOpen ){
     return pSubOpen->pMethods->xUnlock(pSubOpen, lock);
   }
@@ -840,7 +877,7 @@ static int multiplexUnlock(sqlite3_file *pConn, int lock){
 static int multiplexCheckReservedLock(sqlite3_file *pConn, int *pResOut){
   multiplexConn *p = (multiplexConn*)pConn;
   int rc;
-  sqlite3_file *pSubOpen = multiplexSubOpen(p, 0, &rc, NULL);
+  sqlite3_file *pSubOpen = multiplexSubOpen(p->pGroup, 0, &rc, NULL);
   if( pSubOpen ){
     return pSubOpen->pMethods->xCheckReservedLock(pSubOpen, pResOut);
   }
@@ -867,28 +904,20 @@ static int multiplexFileControl(sqlite3_file *pConn, int op, void *pArg){
       break;
     case MULTIPLEX_CTRL_SET_CHUNK_SIZE:
       if( pArg ) {
-        int nChunkSize = *(int *)pArg;
-        if( nChunkSize<1 ){
+        unsigned int szChunk = *(unsigned*)pArg;
+        if( szChunk<1 ){
           rc = SQLITE_MISUSE;
         }else{
           /* Round up to nearest multiple of MAX_PAGE_SIZE. */
-          nChunkSize = (nChunkSize + (MAX_PAGE_SIZE-1));
-          nChunkSize &= ~(MAX_PAGE_SIZE-1);
-          pGroup->nChunkSize = nChunkSize;
+          szChunk = (szChunk + (MAX_PAGE_SIZE-1));
+          szChunk &= ~(MAX_PAGE_SIZE-1);
+          pGroup->szChunk = szChunk;
           rc = SQLITE_OK;
         }
       }
       break;
     case MULTIPLEX_CTRL_SET_MAX_CHUNKS:
-      if( pArg ) {
-        int nMaxChunks = *(int *)pArg;
-        if(( nMaxChunks<1 ) || ( nMaxChunks>SQLITE_MULTIPLEX_MAX_CHUNKS )){
-          rc = SQLITE_MISUSE;
-        }else{
-          pGroup->nMaxChunks = nMaxChunks;
-          rc = SQLITE_OK;
-        }
-      }
+      rc = SQLITE_OK;
       break;
     case SQLITE_FCNTL_SIZE_HINT:
     case SQLITE_FCNTL_CHUNK_SIZE:
@@ -896,7 +925,7 @@ static int multiplexFileControl(sqlite3_file *pConn, int op, void *pArg){
       rc = SQLITE_OK;
       break;
     default:
-      pSubOpen = multiplexSubOpen(p, 0, &rc, NULL);
+      pSubOpen = multiplexSubOpen(pGroup, 0, &rc, NULL);
       if( pSubOpen ){
         rc = pSubOpen->pMethods->xFileControl(pSubOpen, op, pArg);
       }
@@ -910,7 +939,7 @@ static int multiplexFileControl(sqlite3_file *pConn, int op, void *pArg){
 static int multiplexSectorSize(sqlite3_file *pConn){
   multiplexConn *p = (multiplexConn*)pConn;
   int rc;
-  sqlite3_file *pSubOpen = multiplexSubOpen(p, 0, &rc, NULL);
+  sqlite3_file *pSubOpen = multiplexSubOpen(p->pGroup, 0, &rc, NULL);
   if( pSubOpen ){
     return pSubOpen->pMethods->xSectorSize(pSubOpen);
   }
@@ -922,7 +951,7 @@ static int multiplexSectorSize(sqlite3_file *pConn){
 static int multiplexDeviceCharacteristics(sqlite3_file *pConn){
   multiplexConn *p = (multiplexConn*)pConn;
   int rc;
-  sqlite3_file *pSubOpen = multiplexSubOpen(p, 0, &rc, NULL);
+  sqlite3_file *pSubOpen = multiplexSubOpen(p->pGroup, 0, &rc, NULL);
   if( pSubOpen ){
     return pSubOpen->pMethods->xDeviceCharacteristics(pSubOpen);
   }
@@ -940,9 +969,9 @@ static int multiplexShmMap(
 ){
   multiplexConn *p = (multiplexConn*)pConn;
   int rc;
-  sqlite3_file *pSubOpen = multiplexSubOpen(p, 0, &rc, NULL);
+  sqlite3_file *pSubOpen = multiplexSubOpen(p->pGroup, 0, &rc, NULL);
   if( pSubOpen ){
-    return pSubOpen->pMethods->xShmMap(pSubOpen, iRegion, szRegion, bExtend, pp);
+    return pSubOpen->pMethods->xShmMap(pSubOpen, iRegion, szRegion, bExtend,pp);
   }
   return SQLITE_IOERR;
 }
@@ -957,7 +986,7 @@ static int multiplexShmLock(
 ){
   multiplexConn *p = (multiplexConn*)pConn;
   int rc;
-  sqlite3_file *pSubOpen = multiplexSubOpen(p, 0, &rc, NULL);
+  sqlite3_file *pSubOpen = multiplexSubOpen(p->pGroup, 0, &rc, NULL);
   if( pSubOpen ){
     return pSubOpen->pMethods->xShmLock(pSubOpen, ofst, n, flags);
   }
@@ -969,7 +998,7 @@ static int multiplexShmLock(
 static void multiplexShmBarrier(sqlite3_file *pConn){
   multiplexConn *p = (multiplexConn*)pConn;
   int rc;
-  sqlite3_file *pSubOpen = multiplexSubOpen(p, 0, &rc, NULL);
+  sqlite3_file *pSubOpen = multiplexSubOpen(p->pGroup, 0, &rc, NULL);
   if( pSubOpen ){
     pSubOpen->pMethods->xShmBarrier(pSubOpen);
   }
@@ -980,7 +1009,7 @@ static void multiplexShmBarrier(sqlite3_file *pConn){
 static int multiplexShmUnmap(sqlite3_file *pConn, int deleteFlag){
   multiplexConn *p = (multiplexConn*)pConn;
   int rc;
-  sqlite3_file *pSubOpen = multiplexSubOpen(p, 0, &rc, NULL);
+  sqlite3_file *pSubOpen = multiplexSubOpen(p->pGroup, 0, &rc, NULL);
   if( pSubOpen ){
     return pSubOpen->pMethods->xShmUnmap(pSubOpen, deleteFlag);
   }
@@ -1010,11 +1039,6 @@ int sqlite3_multiplex_initialize(const char *zOrigVfsName, int makeDefault){
   if( !gMultiplex.pMutex ){
     return SQLITE_NOMEM;
   }
-  gMultiplex.zName = sqlite3_malloc(pOrigVfs->mxPathname);
-  if( !gMultiplex.zName ){
-    sqlite3_mutex_free(gMultiplex.pMutex);
-    return SQLITE_NOMEM;
-  }
   gMultiplex.pGroups = NULL;
   gMultiplex.isInitialized = 1;
   gMultiplex.pOrigVfs = pOrigVfs;
@@ -1047,7 +1071,8 @@ int sqlite3_multiplex_initialize(const char *zOrigVfsName, int makeDefault){
   gMultiplex.sIoMethodsV1.xCheckReservedLock = multiplexCheckReservedLock;
   gMultiplex.sIoMethodsV1.xFileControl = multiplexFileControl;
   gMultiplex.sIoMethodsV1.xSectorSize = multiplexSectorSize;
-  gMultiplex.sIoMethodsV1.xDeviceCharacteristics = multiplexDeviceCharacteristics;
+  gMultiplex.sIoMethodsV1.xDeviceCharacteristics =
+                                            multiplexDeviceCharacteristics;
   gMultiplex.sIoMethodsV2 = gMultiplex.sIoMethodsV1;
   gMultiplex.sIoMethodsV2.iVersion = 2;
   gMultiplex.sIoMethodsV2.xShmMap = multiplexShmMap;
@@ -1074,7 +1099,6 @@ int sqlite3_multiplex_shutdown(void){
   if( gMultiplex.isInitialized==0 ) return SQLITE_MISUSE;
   if( gMultiplex.pGroups ) return SQLITE_MISUSE;
   gMultiplex.isInitialized = 0;
-  sqlite3_free(gMultiplex.zName);
   sqlite3_mutex_free(gMultiplex.pMutex);
   sqlite3_vfs_unregister(&gMultiplex.sThisVfs);
   memset(&gMultiplex, 0, sizeof(gMultiplex));
@@ -1176,16 +1200,16 @@ static int test_multiplex_dump(
           Tcl_NewIntObj(pGroup->flags));
 
     /* count number of chunks with open handles */
-    for(i=0; i<pGroup->nMaxChunks; i++){
-      if( pGroup->bOpen[i] ) nChunks++;
+    for(i=0; i<pGroup->nReal; i++){
+      if( pGroup->aReal[i].p!=0 ) nChunks++;
     }
     Tcl_ListObjAppendElement(interp, pGroupTerm,
           Tcl_NewIntObj(nChunks));
 
     Tcl_ListObjAppendElement(interp, pGroupTerm,
-          Tcl_NewIntObj(pGroup->nChunkSize));
+          Tcl_NewIntObj(pGroup->szChunk));
     Tcl_ListObjAppendElement(interp, pGroupTerm,
-          Tcl_NewIntObj(pGroup->nMaxChunks));
+          Tcl_NewIntObj(pGroup->nReal));
 
     Tcl_ListObjAppendElement(interp, pResult, pGroupTerm);
   }
diff --git a/src/test_quota.c b/src/test_quota.c
index 9b0e4a9d..74d1a6d3 100644
--- a/src/test_quota.c
+++ b/src/test_quota.c
@@ -95,6 +95,7 @@ struct quotaFile {
   quotaGroup *pGroup;             /* Quota group to which this file belongs */
   sqlite3_int64 iSize;            /* Current size of this file */
   int nRef;                       /* Number of times this file is open */
+  int deleteOnClose;              /* True to delete this file when it closes */
   quotaFile *pNext, **ppPrev;     /* Linked list of files in the same group */
 };
 
@@ -164,12 +165,45 @@ static struct {
 static void quotaEnter(void){ sqlite3_mutex_enter(gQuota.pMutex); }
 static void quotaLeave(void){ sqlite3_mutex_leave(gQuota.pMutex); }
 
+/* Count the number of open files in a quotaGroup 
+*/
+static int quotaGroupOpenFileCount(quotaGroup *pGroup){
+  int N = 0;
+  quotaFile *pFile = pGroup->pFiles;
+  while( pFile ){
+    if( pFile->nRef ) N++;
+    pFile = pFile->pNext;
+  }
+  return N;
+}
+
+/* Remove a file from a quota group.
+*/
+static void quotaRemoveFile(quotaFile *pFile){
+  quotaGroup *pGroup = pFile->pGroup;
+  pGroup->iSize -= pFile->iSize;
+  *pFile->ppPrev = pFile->pNext;
+  if( pFile->pNext ) pFile->pNext->ppPrev = pFile->ppPrev;
+  sqlite3_free(pFile);
+}
+
+/* Remove all files from a quota group.  It is always the case that
+** all files will be closed when this routine is called.
+*/
+static void quotaRemoveAllFiles(quotaGroup *pGroup){
+  while( pGroup->pFiles ){
+    assert( pGroup->pFiles->nRef==0 );
+    quotaRemoveFile(pGroup->pFiles);
+  }
+}
+
 
 /* If the reference count and threshold for a quotaGroup are both
 ** zero, then destroy the quotaGroup.
 */
 static void quotaGroupDeref(quotaGroup *pGroup){
-  if( pGroup->pFiles==0 && pGroup->iLimit==0 ){
+  if( pGroup->iLimit==0 && quotaGroupOpenFileCount(pGroup)==0 ){
+    quotaRemoveAllFiles(pGroup);
     *pGroup->ppPrev = pGroup->pNext;
     if( pGroup->pNext ) pGroup->pNext->ppPrev = pGroup->ppPrev;
     if( pGroup->xDestroy ) pGroup->xDestroy(pGroup->pArg);
@@ -276,6 +310,17 @@ static sqlite3_file *quotaSubOpen(sqlite3_file *pConn){
   return (sqlite3_file*)&p[1];
 }
 
+/* Find a file in a quota group and return a pointer to that file.
+** Return NULL if the file is not in the group.
+*/
+static quotaFile *quotaFindFile(quotaGroup *pGroup, const char *zName){
+  quotaFile *pFile = pGroup->pFiles;
+  while( pFile && strcmp(pFile->zFilename, zName)!=0 ){
+    pFile = pFile->pNext;
+  }
+  return pFile;
+}
+
 /************************* VFS Method Wrappers *****************************/
 /*
 ** This is the xOpen method used for the "quota" VFS.
@@ -319,8 +364,7 @@ static int quotaOpen(
     pSubOpen = quotaSubOpen(pConn);
     rc = pOrigVfs->xOpen(pOrigVfs, zName, pSubOpen, flags, pOutFlags);
     if( rc==SQLITE_OK ){
-      for(pFile=pGroup->pFiles; pFile && strcmp(pFile->zFilename, zName);
-          pFile=pFile->pNext){}
+      pFile = quotaFindFile(pGroup, zName);
       if( pFile==0 ){
         int nName = strlen(zName);
         pFile = (quotaFile *)sqlite3_malloc( sizeof(*pFile) + nName + 1 );
@@ -337,6 +381,7 @@ static int quotaOpen(
         pFile->ppPrev = &pGroup->pFiles;
         pGroup->pFiles = pFile;
         pFile->pGroup = pGroup;
+        pFile->deleteOnClose = (flags & SQLITE_OPEN_DELETEONCLOSE)!=0;
       }
       pFile->nRef++;
       pQuotaOpen->pFile = pFile;
@@ -351,6 +396,49 @@ static int quotaOpen(
   return rc;
 }
 
+/*
+** This is the xDelete method used for the "quota" VFS.
+**
+** If the file being deleted is part of the quota group, then reduce
+** the size of the quota group accordingly.  And remove the file from
+** the set of files in the quota group.
+*/
+static int quotaDelete(
+  sqlite3_vfs *pVfs,          /* The quota VFS */
+  const char *zName,          /* Name of file to be deleted */
+  int syncDir                 /* Do a directory sync after deleting */
+){
+  int rc;                                    /* Result code */         
+  quotaFile *pFile;                          /* Files in the quota */
+  quotaGroup *pGroup;                        /* The group file belongs to */
+  sqlite3_vfs *pOrigVfs = gQuota.pOrigVfs;   /* Real VFS */
+
+  /* Do the actual file delete */
+  rc = pOrigVfs->xDelete(pOrigVfs, zName, syncDir);
+
+  /* If the file just deleted is a member of a quota group, then remove
+  ** it from that quota group.
+  */
+  if( rc==SQLITE_OK ){
+    quotaEnter();
+    pGroup = quotaGroupFind(zName);
+    if( pGroup ){
+      pFile = quotaFindFile(pGroup, zName);
+      if( pFile ){
+        if( pFile->nRef ){
+          pFile->deleteOnClose = 1;
+        }else{
+          quotaRemoveFile(pFile);
+          quotaGroupDeref(pGroup);
+        }
+      }
+    }
+    quotaLeave();
+  }
+  return rc;
+}
+
+
 /************************ I/O Method Wrappers *******************************/
 
 /* xClose requests get passed through to the original VFS.  But we
@@ -367,11 +455,8 @@ static int quotaClose(sqlite3_file *pConn){
   pFile->nRef--;
   if( pFile->nRef==0 ){
     quotaGroup *pGroup = pFile->pGroup;
-    pGroup->iSize -= pFile->iSize;
-    if( pFile->pNext ) pFile->pNext->ppPrev = pFile->ppPrev;
-    *pFile->ppPrev = pFile->pNext;
+    if( pFile->deleteOnClose ) quotaRemoveFile(pFile);
     quotaGroupDeref(pGroup);
-    sqlite3_free(pFile);
   }
   quotaLeave();
   return rc;
@@ -586,6 +671,7 @@ int sqlite3_quota_initialize(const char *zOrigVfsName, int makeDefault){
   gQuota.pOrigVfs = pOrigVfs;
   gQuota.sThisVfs = *pOrigVfs;
   gQuota.sThisVfs.xOpen = quotaOpen;
+  gQuota.sThisVfs.xDelete = quotaDelete;
   gQuota.sThisVfs.szOsFile += sizeof(quotaConn);
   gQuota.sThisVfs.zName = "quota";
   gQuota.sIoMethodsV1.iVersion = 1;
@@ -617,19 +703,20 @@ int sqlite3_quota_initialize(const char *zOrigVfsName, int makeDefault){
 ** All SQLite database connections must be closed before calling this
 ** routine.
 **
-** THIS ROUTINE IS NOT THREADSAFE.  Call this routine exactly one while
+** THIS ROUTINE IS NOT THREADSAFE.  Call this routine exactly once while
 ** shutting down in order to free all remaining quota groups.
 */
 int sqlite3_quota_shutdown(void){
   quotaGroup *pGroup;
   if( gQuota.isInitialized==0 ) return SQLITE_MISUSE;
   for(pGroup=gQuota.pGroup; pGroup; pGroup=pGroup->pNext){
-    if( pGroup->pFiles ) return SQLITE_MISUSE;
+    if( quotaGroupOpenFileCount(pGroup)>0 ) return SQLITE_MISUSE;
   }
   while( gQuota.pGroup ){
     pGroup = gQuota.pGroup;
     gQuota.pGroup = pGroup->pNext;
     pGroup->iLimit = 0;
+    assert( quotaGroupOpenFileCount(pGroup)==0 );
     quotaGroupDeref(pGroup);
   }
   gQuota.isInitialized = 0;
@@ -708,6 +795,43 @@ int sqlite3_quota_set(
   return SQLITE_OK;
 }
 
+/*
+** Bring the named file under quota management.  Or if it is already under
+** management, update its size.
+*/
+int sqlite3_quota_file(const char *zFilename){
+  char *zFull;
+  sqlite3_file *fd;
+  int rc;
+  int outFlags = 0;
+  sqlite3_int64 iSize;
+  fd = sqlite3_malloc(gQuota.sThisVfs.szOsFile + gQuota.sThisVfs.mxPathname+1);
+  if( fd==0 ) return SQLITE_NOMEM;
+  zFull = gQuota.sThisVfs.szOsFile + (char*)fd;
+  rc = gQuota.pOrigVfs->xFullPathname(gQuota.pOrigVfs, zFilename,
+                                      gQuota.sThisVfs.mxPathname+1, zFull);
+  if( rc==SQLITE_OK ){
+    rc = quotaOpen(&gQuota.sThisVfs, zFull, fd, 
+                   SQLITE_OPEN_READONLY | SQLITE_OPEN_MAIN_DB, &outFlags);
+  }
+  if( rc==SQLITE_OK ){
+    fd->pMethods->xFileSize(fd, &iSize);
+    fd->pMethods->xClose(fd);
+  }else if( rc==SQLITE_CANTOPEN ){
+    quotaGroup *pGroup;
+    quotaFile *pFile;
+    quotaEnter();
+    pGroup = quotaGroupFind(zFull);
+    if( pGroup ){
+      pFile = quotaFindFile(pGroup, zFull);
+      if( pFile ) quotaRemoveFile(pFile);
+    }
+    quotaLeave();
+  }
+  sqlite3_free(fd);
+  return rc;
+}
+
   
 /***************************** Test Code ***********************************/
 #ifdef SQLITE_TEST
@@ -884,6 +1008,32 @@ static int test_quota_set(
   return TCL_OK;
 }
 
+/*
+** tclcmd: sqlite3_quota_file FILENAME
+*/
+static int test_quota_file(
+  void * clientData,
+  Tcl_Interp *interp,
+  int objc,
+  Tcl_Obj *CONST objv[]
+){
+  const char *zFilename;          /* File pattern to configure */
+  int rc;                         /* Value returned by quota_file() */
+
+  /* Process arguments */
+  if( objc!=2 ){
+    Tcl_WrongNumArgs(interp, 1, objv, "FILENAME");
+    return TCL_ERROR;
+  }
+  zFilename = Tcl_GetString(objv[1]);
+
+  /* Invoke sqlite3_quota_file() */
+  rc = sqlite3_quota_file(zFilename);
+
+  Tcl_SetResult(interp, (char *)sqlite3TestErrorName(rc), TCL_STATIC);
+  return TCL_OK;
+}
+
 /*
 ** tclcmd:  sqlite3_quota_dump
 */
@@ -917,6 +1067,8 @@ static int test_quota_dump(
             Tcl_NewWideIntObj(pFile->iSize));
       Tcl_ListObjAppendElement(interp, pFileTerm,
             Tcl_NewWideIntObj(pFile->nRef));
+      Tcl_ListObjAppendElement(interp, pFileTerm,
+            Tcl_NewWideIntObj(pFile->deleteOnClose));
       Tcl_ListObjAppendElement(interp, pGroupTerm, pFileTerm);
     }
     Tcl_ListObjAppendElement(interp, pResult, pGroupTerm);
@@ -939,6 +1091,7 @@ int Sqlitequota_Init(Tcl_Interp *interp){
     { "sqlite3_quota_initialize", test_quota_initialize },
     { "sqlite3_quota_shutdown", test_quota_shutdown },
     { "sqlite3_quota_set", test_quota_set },
+    { "sqlite3_quota_file", test_quota_file },
     { "sqlite3_quota_dump", test_quota_dump },
   };
   int i;
diff --git a/src/test_rtree.c b/src/test_rtree.c
index 5fc994dd..9745b005 100644
--- a/src/test_rtree.c
+++ b/src/test_rtree.c
@@ -18,6 +18,7 @@
 /* Solely for the UNUSED_PARAMETER() macro. */
 #include "sqliteInt.h"
 
+#ifdef SQLITE_ENABLE_RTREE
 /* 
 ** Type used to cache parameter information for the "circle" r-tree geometry
 ** callback.
@@ -230,6 +231,7 @@ static int cube_geom(
 
   return SQLITE_OK;
 }
+#endif /* SQLITE_ENABLE_RTREE */
 
 static int register_cube_geom(
   void * clientData,
diff --git a/src/test_stat.c b/src/test_stat.c
index c85463e5..ef817690 100644
--- a/src/test_stat.c
+++ b/src/test_stat.c
@@ -18,7 +18,9 @@
 ** for an example implementation.
 */
 
-#include "sqliteInt.h"
+#ifndef SQLITE_AMALGAMATION
+# include "sqliteInt.h"
+#endif
 
 #ifndef SQLITE_OMIT_VIRTUALTABLE
 
@@ -62,20 +64,11 @@
   "  ncell      INTEGER,          /* Cells on page (0 for overflow) */"     \
   "  payload    INTEGER,          /* Bytes of payload on this page */"      \
   "  unused     INTEGER,          /* Bytes of unused space on this page */" \
-  "  mx_payload INTEGER           /* Largest payload size of all cells */"  \
+  "  mx_payload INTEGER,          /* Largest payload size of all cells */"  \
+  "  pgoffset   INTEGER,          /* Offset of page in file */"             \
+  "  pgsize     INTEGER           /* Size of the page */"                   \
   ");"
 
-#if 0
-#define VTAB_SCHEMA2                                                        \
-  "CREATE TABLE yy( "                                                       \
-  "  pageno   INTEGER,            /* B-tree page number */"                 \
-  "  cellno   INTEGER,            /* Cell number within page */"            \
-  "  local    INTEGER,            /* Bytes of content stored locally */"    \
-  "  payload  INTEGER,            /* Total cell payload size */"            \
-  "  novfl    INTEGER             /* Number of overflow pages */"           \
-  ");"
-#endif
-
 
 typedef struct StatTable StatTable;
 typedef struct StatCursor StatCursor;
@@ -124,6 +117,8 @@ struct StatCursor {
   int nPayload;                   /* Value of 'payload' column */
   int nUnused;                    /* Value of 'unused' column */
   int nMxPayload;                 /* Value of 'mx_payload' column */
+  i64 iOffset;                    /* Value of 'pgOffset' column */
+  int szPage;                     /* Value of 'pgSize' column */
 };
 
 struct StatTable {
@@ -281,6 +276,7 @@ static int statDecodePage(Btree *pBt, StatPage *p){
   int iOff;
   int nHdr;
   int isLeaf;
+  int szPage;
 
   u8 *aData = sqlite3PagerGetData(p->pPg);
   u8 *aHdr = &aData[p->iPgno==1 ? 100 : 0];
@@ -301,10 +297,11 @@ static int statDecodePage(Btree *pBt, StatPage *p){
   }
   p->nUnused = nUnused;
   p->iRightChildPg = isLeaf ? 0 : sqlite3Get4byte(&aHdr[8]);
+  szPage = sqlite3BtreeGetPageSize(pBt);
 
   if( p->nCell ){
     int i;                        /* Used to iterate through cells */
-    int nUsable = sqlite3BtreeGetPageSize(pBt) - sqlite3BtreeGetReserve(pBt);
+    int nUsable = szPage - sqlite3BtreeGetReserve(pBt);
 
     p->aCell = sqlite3_malloc((p->nCell+1) * sizeof(StatCell));
     memset(p->aCell, 0, (p->nCell+1) * sizeof(StatCell));
@@ -359,6 +356,32 @@ static int statDecodePage(Btree *pBt, StatPage *p){
   return SQLITE_OK;
 }
 
+/*
+** Populate the pCsr->iOffset and pCsr->szPage member variables. Based on
+** the current value of pCsr->iPageno.
+*/
+static void statSizeAndOffset(StatCursor *pCsr){
+  StatTable *pTab = (StatTable *)((sqlite3_vtab_cursor *)pCsr)->pVtab;
+  Btree *pBt = pTab->db->aDb[0].pBt;
+  Pager *pPager = sqlite3BtreePager(pBt);
+  sqlite3_file *fd;
+  sqlite3_int64 x[2];
+
+  /* The default page size and offset */
+  pCsr->szPage = sqlite3BtreeGetPageSize(pBt);
+  pCsr->iOffset = pCsr->szPage * (pCsr->iPageno - 1);
+
+  /* If connected to a ZIPVFS backend, override the page size and
+  ** offset with actual values obtained from ZIPVFS.
+  */
+  fd = sqlite3PagerFile(pPager);
+  x[0] = pCsr->iPageno;
+  if( sqlite3OsFileControl(fd, 230440, &x)==SQLITE_OK ){
+    pCsr->iOffset = x[0];
+    pCsr->szPage = x[1];
+  }
+}
+
 /*
 ** Move a statvfs cursor to the next entry in the file.
 */
@@ -417,6 +440,7 @@ static int statNext(sqlite3_vtab_cursor *pCursor){
           pCsr->nUnused = nUsable - 4 - pCsr->nPayload;
         }
         pCell->iOvfl++;
+        statSizeAndOffset(pCsr);
         return SQLITE_OK;
       }
       if( p->iRightChildPg ) break;
@@ -454,6 +478,7 @@ static int statNext(sqlite3_vtab_cursor *pCursor){
     pCsr->iPageno = p->iPgno;
 
     statDecodePage(pBt, p);
+    statSizeAndOffset(pCsr);
 
     switch( p->flags ){
       case 0x05:             /* table internal */
@@ -529,6 +554,12 @@ static int statColumn(
     case 7:            /* mx_payload */
       sqlite3_result_int(ctx, pCsr->nMxPayload);
       break;
+    case 8:            /* pgoffset */
+      sqlite3_result_int64(ctx, pCsr->iOffset);
+      break;
+    case 9:            /* pgsize */
+      sqlite3_result_int(ctx, pCsr->szPage);
+      break;
   }
   return SQLITE_OK;
 }
@@ -568,7 +599,7 @@ int sqlite3_dbstat_register(sqlite3 *db){
 
 #endif
 
-#ifdef SQLITE_TEST
+#if defined(SQLITE_TEST) || TCLSH==2
 #include <tcl.h>
 
 static int test_dbstat(
@@ -604,4 +635,4 @@ int SqlitetestStat_Init(Tcl_Interp *interp){
   Tcl_CreateObjCommand(interp, "register_dbstat_vtab", test_dbstat, 0, 0);
   return TCL_OK;
 }
-#endif
+#endif /* if defined(SQLITE_TEST) || TCLSH==2 */
diff --git a/src/test_syscall.c b/src/test_syscall.c
index b8b05c59..d484f22d 100644
--- a/src/test_syscall.c
+++ b/src/test_syscall.c
@@ -325,6 +325,7 @@ static int ts_pread64(int fd, void *aBuf, size_t nBuf, off_t off){
 */
 static int ts_write(int fd, const void *aBuf, size_t nBuf){
   if( tsIsFailErrno("write") ){
+    if( tsErrno("write")==EINTR ) orig_write(fd, aBuf, nBuf/2);
     return -1;
   }
   return orig_write(fd, aBuf, nBuf);
@@ -671,4 +672,3 @@ int SqlitetestSyscall_Init(Tcl_Interp *interp){
   return TCL_OK;
 }
 #endif
-
diff --git a/src/test_thread.c b/src/test_thread.c
index 3a13dd66..aa894670 100644
--- a/src/test_thread.c
+++ b/src/test_thread.c
@@ -282,6 +282,21 @@ static int sqlthread_open(
 
   zFilename = Tcl_GetString(objv[2]);
   rc = sqlite3_open(zFilename, &db);
+#ifdef SQLITE_HAS_CODEC
+  if( db && objc>=4 ){
+    const char *zKey;
+    int nKey;
+    zKey = Tcl_GetStringFromObj(objv[3], &nKey);
+    rc = sqlite3_key(db, zKey, nKey);
+    if( rc!=SQLITE_OK ){
+      char *zErrMsg = sqlite3_mprintf("error %d: %s", rc, sqlite3_errmsg(db));
+      sqlite3_close(db);
+      Tcl_AppendResult(interp, zErrMsg, (char*)0);
+      sqlite3_free(zErrMsg);
+      return TCL_ERROR;
+    }
+  }
+#endif
   Md5_Register(db);
   sqlite3_busy_handler(db, xBusy, 0);
   
@@ -305,7 +320,7 @@ static int sqlthread_id(
   Tcl_Obj *CONST objv[]
 ){
   Tcl_ThreadId id = Tcl_GetCurrentThread();
-  Tcl_SetObjResult(interp, Tcl_NewIntObj((int)id));
+  Tcl_SetObjResult(interp, Tcl_NewIntObj(SQLITE_PTR_TO_INT(id)));
   UNUSED_PARAMETER(clientData);
   UNUSED_PARAMETER(objc);
   UNUSED_PARAMETER(objv);
@@ -349,7 +364,7 @@ static int sqlthread_proc(
   if( rc!=TCL_OK ) return rc;
   pSub = &aSub[iIndex];
 
-  if( objc!=(pSub->nArg+2) ){
+  if( objc<(pSub->nArg+2) ){
     Tcl_WrongNumArgs(interp, 2, objv, pSub->zUsage);
     return TCL_ERROR;
   }
diff --git a/src/test_vfs.c b/src/test_vfs.c
index a8b53526..546cb7cf 100644
--- a/src/test_vfs.c
+++ b/src/test_vfs.c
@@ -123,6 +123,8 @@ struct Testvfs {
 #define TESTVFS_TRUNCATE_MASK     0x00002000
 #define TESTVFS_ACCESS_MASK       0x00004000
 #define TESTVFS_FULLPATHNAME_MASK 0x00008000
+#define TESTVFS_READ_MASK         0x00010000
+
 #define TESTVFS_ALL_MASK          0x0001FFFF
 
 
@@ -325,8 +327,22 @@ static int tvfsRead(
   int iAmt, 
   sqlite_int64 iOfst
 ){
-  TestvfsFd *p = tvfsGetFd(pFile);
-  return sqlite3OsRead(p->pReal, zBuf, iAmt, iOfst);
+  int rc = SQLITE_OK;
+  TestvfsFd *pFd = tvfsGetFd(pFile);
+  Testvfs *p = (Testvfs *)pFd->pVfs->pAppData;
+  if( p->pScript && p->mask&TESTVFS_READ_MASK ){
+    tvfsExecTcl(p, "xRead", 
+        Tcl_NewStringObj(pFd->zFilename, -1), pFd->pShmId, 0
+    );
+    tvfsResultCode(p, &rc);
+  }
+  if( rc==SQLITE_OK && p->mask&TESTVFS_READ_MASK && tvfsInjectIoerr(p) ){
+    rc = SQLITE_IOERR;
+  }
+  if( rc==SQLITE_OK ){
+    rc = sqlite3OsRead(pFd->pReal, zBuf, iAmt, iOfst);
+  }
+  return rc;
 }
 
 /*
@@ -1030,6 +1046,7 @@ static int testvfs_obj_cmd(
         { "xSync",         TESTVFS_SYNC_MASK },
         { "xDelete",       TESTVFS_DELETE_MASK },
         { "xWrite",        TESTVFS_WRITE_MASK },
+        { "xRead",         TESTVFS_READ_MASK },
         { "xTruncate",     TESTVFS_TRUNCATE_MASK },
         { "xOpen",         TESTVFS_OPEN_MASK },
         { "xClose",        TESTVFS_CLOSE_MASK },
diff --git a/src/trigger.c b/src/trigger.c
index 6242de5e..22c4877b 100644
--- a/src/trigger.c
+++ b/src/trigger.c
@@ -117,15 +117,28 @@ void sqlite3BeginTrigger(
       goto trigger_cleanup;
     }
   }
+  if( !pTableName || db->mallocFailed ){
+    goto trigger_cleanup;
+  }
+
+  /* A long-standing parser bug is that this syntax was allowed:
+  **
+  **    CREATE TRIGGER attached.demo AFTER INSERT ON attached.tab ....
+  **                                                 ^^^^^^^^
+  **
+  ** To maintain backwards compatibility, ignore the database
+  ** name on pTableName if we are reparsing our of SQLITE_MASTER.
+  */
+  if( db->init.busy && iDb!=1 ){
+    sqlite3DbFree(db, pTableName->a[0].zDatabase);
+    pTableName->a[0].zDatabase = 0;
+  }
 
   /* If the trigger name was unqualified, and the table is a temp table,
   ** then set iDb to 1 to create the trigger in the temporary database.
   ** If sqlite3SrcListLookup() returns 0, indicating the table does not
   ** exist, the error is caught by the block below.
   */
-  if( !pTableName || db->mallocFailed ){
-    goto trigger_cleanup;
-  }
   pTab = sqlite3SrcListLookup(pParse, pTableName);
   if( db->init.busy==0 && pName2->n==0 && pTab
         && pTab->pSchema==db->aDb[1].pSchema ){
diff --git a/src/update.c b/src/update.c
index d445f01f..1e305221 100644
--- a/src/update.c
+++ b/src/update.c
@@ -311,7 +311,9 @@ void sqlite3Update(
   /* Begin the database scan
   */
   sqlite3VdbeAddOp2(v, OP_Null, 0, regOldRowid);
-  pWInfo = sqlite3WhereBegin(pParse, pTabList, pWhere,0, WHERE_ONEPASS_DESIRED);
+  pWInfo = sqlite3WhereBegin(
+      pParse, pTabList, pWhere, 0, 0, WHERE_ONEPASS_DESIRED
+  );
   if( pWInfo==0 ) goto update_cleanup;
   okOnePass = pWInfo->okOnePass;
 
@@ -354,6 +356,7 @@ void sqlite3Update(
       }
     }
     for(i=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, i++){
+      assert( aRegIdx );
       if( openAll || aRegIdx[i]>0 ){
         KeyInfo *pKey = sqlite3IndexKeyinfo(pParse, pIdx);
         sqlite3VdbeAddOp4(v, OP_OpenWrite, iCur+i+1, pIdx->tnum, iDb,
@@ -527,6 +530,7 @@ void sqlite3Update(
 
   /* Close all tables */
   for(i=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, i++){
+    assert( aRegIdx );
     if( openAll || aRegIdx[i]>0 ){
       sqlite3VdbeAddOp2(v, OP_Close, iCur+i+1, 0);
     }
diff --git a/src/utf.c b/src/utf.c
index 17f3a09a..e94815b5 100644
--- a/src/utf.c
+++ b/src/utf.c
@@ -464,7 +464,7 @@ char *sqlite3Utf16to8(sqlite3 *db, const void *z, int nByte, u8 enc){
 ** If a malloc failure occurs, NULL is returned and the db.mallocFailed
 ** flag set.
 */
-#ifdef SQLITE_ENABLE_STAT2
+#ifdef SQLITE_ENABLE_STAT3
 char *sqlite3Utf8to16(sqlite3 *db, u8 enc, char *z, int n, int *pnOut){
   Mem m;
   memset(&m, 0, sizeof(m));
diff --git a/src/util.c b/src/util.c
index de735772..3356417e 100644
--- a/src/util.c
+++ b/src/util.c
@@ -331,7 +331,7 @@ int sqlite3AtoF(const char *z, double *pResult, int length, u8 enc){
     }
     /* copy digits to exponent */
     while( z<zEnd && sqlite3Isdigit(*z) ){
-      e = e*10 + (*z - '0');
+      e = e<10000 ? (e*10 + (*z - '0')) : 10000;
       z+=incr;
       eValid = 1;
     }
@@ -382,6 +382,12 @@ do_atof_calc:
           result = s * scale;
           result *= 1.0e+308;
         }
+      }else if( e>=342 ){
+        if( esign<0 ){
+          result = 0.0*s;
+        }else{
+          result = 1e308*1e308*s;  /* Infinity */
+        }
       }else{
         /* 1.0e+22 is the largest power of 10 than can be 
         ** represented exactly. */
@@ -1149,12 +1155,15 @@ int sqlite3AbsInt32(int x){
 
 #ifdef SQLITE_ENABLE_8_3_NAMES
 /*
-** If SQLITE_ENABLE_8_3_NAME is set at compile-time and if the database
+** If SQLITE_ENABLE_8_3_NAMES is set at compile-time and if the database
 ** filename in zBaseFilename is a URI with the "8_3_names=1" parameter and
 ** if filename in z[] has a suffix (a.k.a. "extension") that is longer than
 ** three characters, then shorten the suffix on z[] to be the last three
 ** characters of the original suffix.
 **
+** If SQLITE_ENABLE_8_3_NAMES is set to 2 at compile-time, then always
+** do the suffix shortening regardless of URI parameter.
+**
 ** Examples:
 **
 **     test.db-journal    =>   test.nal
@@ -1162,9 +1171,12 @@ int sqlite3AbsInt32(int x){
 **     test.db-shm        =>   test.shm
 */
 void sqlite3FileSuffix3(const char *zBaseFilename, char *z){
+#if SQLITE_ENABLE_8_3_NAMES<2
   const char *zOk;
   zOk = sqlite3_uri_parameter(zBaseFilename, "8_3_names");
-  if( zOk && sqlite3GetBoolean(zOk) ){
+  if( zOk && sqlite3GetBoolean(zOk) )
+#endif
+  {
     int i, sz;
     sz = sqlite3Strlen30(z);
     for(i=sz-1; i>0 && z[i]!='/' && z[i]!='.'; i--){}
diff --git a/src/vacuum.c b/src/vacuum.c
index 5a4ed320..58a3c9d6 100644
--- a/src/vacuum.c
+++ b/src/vacuum.c
@@ -45,7 +45,7 @@ static int execSql(sqlite3 *db, char **pzErrMsg, const char *zSql){
     return sqlite3_errcode(db);
   }
   VVA_ONLY( rc = ) sqlite3_step(pStmt);
-  assert( rc!=SQLITE_ROW );
+  assert( rc!=SQLITE_ROW || (db->flags&SQLITE_CountRows) );
   return vacuumFinalize(db, pStmt, pzErrMsg);
 }
 
@@ -263,13 +263,11 @@ int sqlite3RunVacuum(char **pzErrMsg, sqlite3 *db){
   );
   if( rc ) goto end_of_vacuum;
 
-  /* At this point, unless the main db was completely empty, there is now a
-  ** transaction open on the vacuum database, but not on the main database.
-  ** Open a btree level transaction on the main database. This allows a
-  ** call to sqlite3BtreeCopyFile(). The main database btree level
-  ** transaction is then committed, so the SQL level never knows it was
-  ** opened for writing. This way, the SQL transaction used to create the
-  ** temporary database never needs to be committed.
+  /* At this point, there is a write transaction open on both the 
+  ** vacuum database and the main database. Assuming no error occurs,
+  ** both transactions are closed by this block - the main database
+  ** transaction by sqlite3BtreeCopyFile() and the other by an explicit
+  ** call to sqlite3BtreeCommit().
   */
   {
     u32 meta;
diff --git a/src/vdbe.c b/src/vdbe.c
index d965b967..22e6d9c5 100644
--- a/src/vdbe.c
+++ b/src/vdbe.c
@@ -157,6 +157,13 @@ int sqlite3_found_count = 0;
 */
 #define ExpandBlob(P) (((P)->flags&MEM_Zero)?sqlite3VdbeMemExpandBlob(P):0)
 
+/* Return true if the cursor was opened using the OP_OpenSorter opcode. */
+#ifdef SQLITE_OMIT_MERGE_SORT
+# define isSorter(x) 0
+#else
+# define isSorter(x) ((x)->pSorter!=0)
+#endif
+
 /*
 ** Argument pMem points at a register that will be passed to a
 ** user-defined function or returned to the user as the result of a query.
@@ -666,7 +673,7 @@ int sqlite3VdbeExec(
       assert( pOp->p2<=p->nMem );
       pOut = &aMem[pOp->p2];
       memAboutToChange(p, pOut);
-      sqlite3VdbeMemReleaseExternal(pOut);
+      MemReleaseExt(pOut);
       pOut->flags = MEM_Int;
     }
 
@@ -1027,6 +1034,11 @@ case OP_Move: {
     zMalloc = pOut->zMalloc;
     pOut->zMalloc = 0;
     sqlite3VdbeMemMove(pOut, pIn1);
+#ifdef SQLITE_DEBUG
+    if( pOut->pScopyFrom>=&aMem[p1] && pOut->pScopyFrom<&aMem[p1+pOp->p3] ){
+      pOut->pScopyFrom += p1 - pOp->p2;
+    }
+#endif
     pIn1->zMalloc = zMalloc;
     REGISTER_TRACE(p2++, pOut);
     pIn1++;
@@ -2009,6 +2021,16 @@ case OP_BitNot: {             /* same as TK_BITNOT, in1, out2 */
   break;
 }
 
+/* Opcode: Once P1 P2 * * *
+**
+** Jump to P2 if the value in register P1 is a not null or zero.  If
+** the value is NULL or zero, fall through and change the P1 register
+** to an integer 1.
+**
+** When P1 is not used otherwise in a program, this opcode falls through
+** once and jumps on all subsequent invocations.  It is the equivalent
+** of "OP_If P1 P2", followed by "OP_Integer 1 P1".
+*/
 /* Opcode: If P1 P2 P3 * *
 **
 ** Jump to P2 if the value in register P1 is true.  The value
@@ -2021,6 +2043,7 @@ case OP_BitNot: {             /* same as TK_BITNOT, in1, out2 */
 ** is considered true if it has a numeric value of zero.  If the value
 ** in P1 is NULL then take the jump if P3 is true.
 */
+case OP_Once:               /* jump, in1 */
 case OP_If:                 /* jump, in1 */
 case OP_IfNot: {            /* jump, in1 */
   int c;
@@ -2037,6 +2060,12 @@ case OP_IfNot: {            /* jump, in1 */
   }
   if( c ){
     pc = pOp->p2-1;
+  }else if( pOp->opcode==OP_Once ){
+    assert( (pIn1->flags & (MEM_Agg|MEM_Dyn|MEM_RowSet|MEM_Frame))==0 );
+    memAboutToChange(p, pIn1);
+    pIn1->flags = MEM_Int;
+    pIn1->u.i = 1;
+    REGISTER_TRACE(pOp->p1, pIn1);
   }
   break;
 }
@@ -2106,6 +2135,7 @@ case OP_Column: {
   u32 szField;       /* Number of bytes in the content of a field */
   int szHdr;         /* Size of the header size field at start of record */
   int avail;         /* Number of bytes of available data */
+  u32 t;             /* A type code from the record header */
   Mem *pReg;         /* PseudoTable input register */
 
 
@@ -2117,7 +2147,6 @@ case OP_Column: {
   assert( pOp->p3>0 && pOp->p3<=p->nMem );
   pDest = &aMem[pOp->p3];
   memAboutToChange(p, pDest);
-  MemSetTypeFlag(pDest, MEM_Null);
   zRec = 0;
 
   /* This block sets the variable payloadSize to be the total number of
@@ -2149,7 +2178,7 @@ case OP_Column: {
       zRec = (char*)pC->aRow;
     }else if( pC->isIndex ){
       assert( sqlite3BtreeCursorIsValid(pCrsr) );
-      rc = sqlite3BtreeKeySize(pCrsr, &payloadSize64);
+      VVA_ONLY(rc =) sqlite3BtreeKeySize(pCrsr, &payloadSize64);
       assert( rc==SQLITE_OK );   /* True because of CursorMoveto() call above */
       /* sqlite3BtreeParseCellPtr() uses getVarint32() to extract the
       ** payload size, so it is impossible for payloadSize64 to be
@@ -2158,10 +2187,10 @@ case OP_Column: {
       payloadSize = (u32)payloadSize64;
     }else{
       assert( sqlite3BtreeCursorIsValid(pCrsr) );
-      rc = sqlite3BtreeDataSize(pCrsr, &payloadSize);
+      VVA_ONLY(rc =) sqlite3BtreeDataSize(pCrsr, &payloadSize);
       assert( rc==SQLITE_OK );   /* DataSize() cannot fail */
     }
-  }else if( pC->pseudoTableReg>0 ){
+  }else if( ALWAYS(pC->pseudoTableReg>0) ){
     pReg = &aMem[pC->pseudoTableReg];
     assert( pReg->flags & MEM_Blob );
     assert( memIsValid(pReg) );
@@ -2174,9 +2203,10 @@ case OP_Column: {
     payloadSize = 0;
   }
 
-  /* If payloadSize is 0, then just store a NULL */
+  /* If payloadSize is 0, then just store a NULL.  This can happen because of
+  ** nullRow or because of a corrupt database. */
   if( payloadSize==0 ){
-    assert( pDest->flags&MEM_Null );
+    MemSetTypeFlag(pDest, MEM_Null);
     goto op_column_out;
   }
   assert( db->aLimit[SQLITE_LIMIT_LENGTH]>=0 );
@@ -2283,8 +2313,14 @@ case OP_Column: {
     for(i=0; i<nField; i++){
       if( zIdx<zEndHdr ){
         aOffset[i] = offset;
-        zIdx += getVarint32(zIdx, aType[i]);
-        szField = sqlite3VdbeSerialTypeLen(aType[i]);
+        if( zIdx[0]<0x80 ){
+          t = zIdx[0];
+          zIdx++;
+        }else{
+          zIdx += sqlite3GetVarint32(zIdx, &t);
+        }
+        aType[i] = t;
+        szField = sqlite3VdbeSerialTypeLen(t);
         offset += szField;
         if( offset<szField ){  /* True if offset overflows */
           zIdx = &zEndHdr[1];  /* Forces SQLITE_CORRUPT return below */
@@ -2325,7 +2361,7 @@ case OP_Column: {
   if( aOffset[p2] ){
     assert( rc==SQLITE_OK );
     if( zRec ){
-      sqlite3VdbeMemReleaseExternal(pDest);
+      MemReleaseExt(pDest);
       sqlite3VdbeSerialGet((u8 *)&zRec[aOffset[p2]], aType[p2], pDest);
     }else{
       len = sqlite3VdbeSerialTypeLen(aType[p2]);
@@ -2342,7 +2378,7 @@ case OP_Column: {
     if( pOp->p4type==P4_MEM ){
       sqlite3VdbeMemShallowCopy(pDest, pOp->p4.pMem, MEM_Static);
     }else{
-      assert( pDest->flags&MEM_Null );
+      MemSetTypeFlag(pDest, MEM_Null);
     }
   }
 
@@ -2538,7 +2574,7 @@ case OP_Count: {         /* out2-prerelease */
   BtCursor *pCrsr;
 
   pCrsr = p->apCsr[pOp->p1]->pCursor;
-  if( pCrsr ){
+  if( ALWAYS(pCrsr) ){
     rc = sqlite3BtreeCount(pCrsr, &nEntry);
   }else{
     nEntry = 0;
@@ -3100,15 +3136,9 @@ case OP_OpenWrite: {
   rc = sqlite3BtreeCursor(pX, p2, wrFlag, pKeyInfo, pCur->pCursor);
   pCur->pKeyInfo = pKeyInfo;
 
-  /* Since it performs no memory allocation or IO, the only values that
-  ** sqlite3BtreeCursor() may return are SQLITE_EMPTY and SQLITE_OK. 
-  ** SQLITE_EMPTY is only returned when attempting to open the table
-  ** rooted at page 1 of a zero-byte database.  */
-  assert( rc==SQLITE_EMPTY || rc==SQLITE_OK );
-  if( rc==SQLITE_EMPTY ){
-    pCur->pCursor = 0;
-    rc = SQLITE_OK;
-  }
+  /* Since it performs no memory allocation or IO, the only value that
+  ** sqlite3BtreeCursor() may return is SQLITE_OK. */
+  assert( rc==SQLITE_OK );
 
   /* Set the VdbeCursor.isTable and isIndex variables. Previous versions of
   ** SQLite used to check if the root-page flags were sane at this point
@@ -3119,7 +3149,7 @@ case OP_OpenWrite: {
   break;
 }
 
-/* Opcode: OpenEphemeral P1 P2 * P4 *
+/* Opcode: OpenEphemeral P1 P2 * P4 P5
 **
 ** Open a new cursor P1 to a transient table.
 ** The cursor is always opened read/write even if 
@@ -3136,6 +3166,11 @@ case OP_OpenWrite: {
 ** to a TEMP table at the SQL level, or to a table opened by
 ** this opcode.  Then this opcode was call OpenVirtual.  But
 ** that created confusion with the whole virtual-table idea.
+**
+** The P5 parameter can be a mask of the BTREE_* flags defined
+** in btree.h.  These flags control aspects of the operation of
+** the btree.  The BTREE_OMIT_JOURNAL and BTREE_SINGLE flags are
+** added automatically.
 */
 /* Opcode: OpenAutoindex P1 P2 * P4 *
 **
@@ -3172,7 +3207,7 @@ case OP_OpenEphemeral: {
     if( pOp->p4.pKeyInfo ){
       int pgno;
       assert( pOp->p4type==P4_KEYINFO );
-      rc = sqlite3BtreeCreateTable(pCx->pBt, &pgno, BTREE_BLOBKEY); 
+      rc = sqlite3BtreeCreateTable(pCx->pBt, &pgno, BTREE_BLOBKEY | pOp->p5); 
       if( rc==SQLITE_OK ){
         assert( pgno==MASTER_ROOT+1 );
         rc = sqlite3BtreeCursor(pCx->pBt, pgno, 1, 
@@ -3191,6 +3226,28 @@ case OP_OpenEphemeral: {
   break;
 }
 
+/* Opcode: OpenSorter P1 P2 * P4 *
+**
+** This opcode works like OP_OpenEphemeral except that it opens
+** a transient index that is specifically designed to sort large
+** tables using an external merge-sort algorithm.
+*/
+case OP_SorterOpen: {
+  VdbeCursor *pCx;
+#ifndef SQLITE_OMIT_MERGE_SORT
+  pCx = allocateCursor(p, pOp->p1, pOp->p2, -1, 1);
+  if( pCx==0 ) goto no_mem;
+  pCx->pKeyInfo = pOp->p4.pKeyInfo;
+  pCx->pKeyInfo->enc = ENC(p->db);
+  pCx->isSorter = 1;
+  rc = sqlite3VdbeSorterInit(db, pCx);
+#else
+  pOp->opcode = OP_OpenEphemeral;
+  pc--;
+#endif
+  break;
+}
+
 /* Opcode: OpenPseudo P1 P2 P3 * *
 **
 ** Open a new cursor that points to a fake table that contains a single
@@ -3303,7 +3360,7 @@ case OP_SeekGt: {       /* jump, in3 */
   assert( OP_SeekGe == OP_SeekLt+2 );
   assert( OP_SeekGt == OP_SeekLt+3 );
   assert( pC->isOrdered );
-  if( pC->pCursor!=0 ){
+  if( ALWAYS(pC->pCursor!=0) ){
     oc = pOp->opcode;
     pC->nullRow = 0;
     if( pC->isTable ){
@@ -3491,6 +3548,7 @@ case OP_Found: {        /* jump, in3 */
   int alreadyExists;
   VdbeCursor *pC;
   int res;
+  char *pFree;
   UnpackedRecord *pIdxKey;
   UnpackedRecord r;
   char aTempRec[ROUND8(sizeof(UnpackedRecord)) + sizeof(Mem)*3 + 7];
@@ -3518,18 +3576,18 @@ case OP_Found: {        /* jump, in3 */
       r.flags = UNPACKED_PREFIX_MATCH;
       pIdxKey = &r;
     }else{
+      pIdxKey = sqlite3VdbeAllocUnpackedRecord(
+          pC->pKeyInfo, aTempRec, sizeof(aTempRec), &pFree
+      ); 
+      if( pIdxKey==0 ) goto no_mem;
       assert( pIn3->flags & MEM_Blob );
       assert( (pIn3->flags & MEM_Zero)==0 );  /* zeroblobs already expanded */
-      pIdxKey = sqlite3VdbeRecordUnpack(pC->pKeyInfo, pIn3->n, pIn3->z,
-                                        aTempRec, sizeof(aTempRec));
-      if( pIdxKey==0 ){
-        goto no_mem;
-      }
+      sqlite3VdbeRecordUnpack(pC->pKeyInfo, pIn3->n, pIn3->z, pIdxKey);
       pIdxKey->flags |= UNPACKED_PREFIX_MATCH;
     }
     rc = sqlite3BtreeMovetoUnpacked(pC->pCursor, pIdxKey, 0, 0, &res);
     if( pOp->p4.i==0 ){
-      sqlite3VdbeDeleteUnpackedRecord(pIdxKey);
+      sqlite3DbFree(db, pFree);
     }
     if( rc!=SQLITE_OK ){
       break;
@@ -3661,7 +3719,7 @@ case OP_NotExists: {        /* jump, in3 */
   assert( pC->isTable );
   assert( pC->pseudoTableReg==0 );
   pCrsr = pC->pCursor;
-  if( pCrsr!=0 ){
+  if( ALWAYS(pCrsr!=0) ){
     res = 0;
     iKey = pIn3->u.i;
     rc = sqlite3BtreeMovetoUnpacked(pCrsr, 0, iKey, 0, &res);
@@ -4039,6 +4097,45 @@ case OP_ResetCount: {
   break;
 }
 
+/* Opcode: SorterCompare P1 P2 P3
+**
+** P1 is a sorter cursor. This instruction compares the record blob in 
+** register P3 with the entry that the sorter cursor currently points to.
+** If, excluding the rowid fields at the end, the two records are a match,
+** fall through to the next instruction. Otherwise, jump to instruction P2.
+*/
+case OP_SorterCompare: {
+  VdbeCursor *pC;
+  int res;
+
+  pC = p->apCsr[pOp->p1];
+  assert( isSorter(pC) );
+  pIn3 = &aMem[pOp->p3];
+  rc = sqlite3VdbeSorterCompare(pC, pIn3, &res);
+  if( res ){
+    pc = pOp->p2-1;
+  }
+  break;
+};
+
+/* Opcode: SorterData P1 P2 * * *
+**
+** Write into register P2 the current sorter data for sorter cursor P1.
+*/
+case OP_SorterData: {
+  VdbeCursor *pC;
+#ifndef SQLITE_OMIT_MERGE_SORT
+  pOut = &aMem[pOp->p2];
+  pC = p->apCsr[pOp->p1];
+  assert( pC->isSorter );
+  rc = sqlite3VdbeSorterRowkey(pC, pOut);
+#else
+  pOp->opcode = OP_RowKey;
+  pc--;
+#endif
+  break;
+}
+
 /* Opcode: RowData P1 P2 * * *
 **
 ** Write into register P2 the complete row data for cursor P1.
@@ -4072,11 +4169,13 @@ case OP_RowData: {
   /* Note that RowKey and RowData are really exactly the same instruction */
   assert( pOp->p1>=0 && pOp->p1<p->nCursor );
   pC = p->apCsr[pOp->p1];
-  assert( pC->isTable || pOp->opcode==OP_RowKey );
+  assert( pC->isSorter==0 );
+  assert( pC->isTable || pOp->opcode!=OP_RowData );
   assert( pC->isIndex || pOp->opcode==OP_RowData );
   assert( pC!=0 );
   assert( pC->nullRow==0 );
   assert( pC->pseudoTableReg==0 );
+  assert( !pC->isSorter );
   assert( pC->pCursor!=0 );
   pCrsr = pC->pCursor;
   assert( sqlite3BtreeCursorIsValid(pCrsr) );
@@ -4092,14 +4191,14 @@ case OP_RowData: {
 
   if( pC->isIndex ){
     assert( !pC->isTable );
-    rc = sqlite3BtreeKeySize(pCrsr, &n64);
+    VVA_ONLY(rc =) sqlite3BtreeKeySize(pCrsr, &n64);
     assert( rc==SQLITE_OK );    /* True because of CursorMoveto() call above */
     if( n64>db->aLimit[SQLITE_LIMIT_LENGTH] ){
       goto too_big;
     }
     n = (u32)n64;
   }else{
-    rc = sqlite3BtreeDataSize(pCrsr, &n);
+    VVA_ONLY(rc =) sqlite3BtreeDataSize(pCrsr, &n);
     assert( rc==SQLITE_OK );    /* DataSize() cannot fail */
     if( n>(u32)db->aLimit[SQLITE_LIMIT_LENGTH] ){
       goto too_big;
@@ -4181,6 +4280,7 @@ case OP_NullRow: {
   assert( pC!=0 );
   pC->nullRow = 1;
   pC->rowidIsValid = 0;
+  assert( pC->pCursor || pC->pVtabCursor );
   if( pC->pCursor ){
     sqlite3BtreeClearCursor(pC->pCursor);
   }
@@ -4204,9 +4304,8 @@ case OP_Last: {        /* jump */
   pC = p->apCsr[pOp->p1];
   assert( pC!=0 );
   pCrsr = pC->pCursor;
-  if( pCrsr==0 ){
-    res = 1;
-  }else{
+  res = 0;
+  if( ALWAYS(pCrsr!=0) ){
     rc = sqlite3BtreeLast(pCrsr, &res);
   }
   pC->nullRow = (u8)res;
@@ -4232,6 +4331,10 @@ case OP_Last: {        /* jump */
 ** regression tests can determine whether or not the optimizer is
 ** correctly optimizing out sorts.
 */
+case OP_SorterSort:    /* jump */
+#ifdef SQLITE_OMIT_MERGE_SORT
+  pOp->opcode = OP_Sort;
+#endif
 case OP_Sort: {        /* jump */
 #ifdef SQLITE_TEST
   sqlite3_sort_count++;
@@ -4256,8 +4359,13 @@ case OP_Rewind: {        /* jump */
   assert( pOp->p1>=0 && pOp->p1<p->nCursor );
   pC = p->apCsr[pOp->p1];
   assert( pC!=0 );
+  assert( pC->isSorter==(pOp->opcode==OP_SorterSort) );
   res = 1;
-  if( (pCrsr = pC->pCursor)!=0 ){
+  if( isSorter(pC) ){
+    rc = sqlite3VdbeSorterRewind(db, pC, &res);
+  }else{
+    pCrsr = pC->pCursor;
+    assert( pCrsr );
     rc = sqlite3BtreeFirst(pCrsr, &res);
     pC->atFirst = res==0 ?1:0;
     pC->deferredMoveto = 0;
@@ -4272,7 +4380,7 @@ case OP_Rewind: {        /* jump */
   break;
 }
 
-/* Opcode: Next P1 P2 * * P5
+/* Opcode: Next P1 P2 * P4 P5
 **
 ** Advance cursor P1 so that it points to the next key/data pair in its
 ** table or index.  If there are no more key/value pairs then fall through
@@ -4281,6 +4389,9 @@ case OP_Rewind: {        /* jump */
 **
 ** The P1 cursor must be for a real table, not a pseudo-table.
 **
+** P4 is always of type P4_ADVANCE. The function pointer points to
+** sqlite3BtreeNext().
+**
 ** If P5 is positive and the jump is taken, then event counter
 ** number P5-1 in the prepared statement is incremented.
 **
@@ -4295,13 +4406,19 @@ case OP_Rewind: {        /* jump */
 **
 ** The P1 cursor must be for a real table, not a pseudo-table.
 **
+** P4 is always of type P4_ADVANCE. The function pointer points to
+** sqlite3BtreePrevious().
+**
 ** If P5 is positive and the jump is taken, then event counter
 ** number P5-1 in the prepared statement is incremented.
 */
+case OP_SorterNext:    /* jump */
+#ifdef SQLITE_OMIT_MERGE_SORT
+  pOp->opcode = OP_Next;
+#endif
 case OP_Prev:          /* jump */
 case OP_Next: {        /* jump */
   VdbeCursor *pC;
-  BtCursor *pCrsr;
   int res;
 
   CHECK_FOR_INTERRUPT;
@@ -4311,15 +4428,18 @@ case OP_Next: {        /* jump */
   if( pC==0 ){
     break;  /* See ticket #2273 */
   }
-  pCrsr = pC->pCursor;
-  if( pCrsr==0 ){
-    pC->nullRow = 1;
-    break;
+  assert( pC->isSorter==(pOp->opcode==OP_SorterNext) );
+  if( isSorter(pC) ){
+    assert( pOp->opcode==OP_SorterNext );
+    rc = sqlite3VdbeSorterNext(db, pC, &res);
+  }else{
+    res = 1;
+    assert( pC->deferredMoveto==0 );
+    assert( pC->pCursor );
+    assert( pOp->opcode!=OP_Next || pOp->p4.xAdvance==sqlite3BtreeNext );
+    assert( pOp->opcode!=OP_Prev || pOp->p4.xAdvance==sqlite3BtreePrevious );
+    rc = pOp->p4.xAdvance(pC->pCursor, &res);
   }
-  res = 1;
-  assert( pC->deferredMoveto==0 );
-  rc = pOp->opcode==OP_Next ? sqlite3BtreeNext(pCrsr, &res) :
-                              sqlite3BtreePrevious(pCrsr, &res);
   pC->nullRow = (u8)res;
   pC->cacheStatus = CACHE_STALE;
   if( res==0 ){
@@ -4345,6 +4465,10 @@ case OP_Next: {        /* jump */
 ** This instruction only works for indices.  The equivalent instruction
 ** for tables is OP_Insert.
 */
+case OP_SorterInsert:       /* in2 */
+#ifdef SQLITE_OMIT_MERGE_SORT
+  pOp->opcode = OP_IdxInsert;
+#endif
 case OP_IdxInsert: {        /* in2 */
   VdbeCursor *pC;
   BtCursor *pCrsr;
@@ -4354,6 +4478,7 @@ case OP_IdxInsert: {        /* in2 */
   assert( pOp->p1>=0 && pOp->p1<p->nCursor );
   pC = p->apCsr[pOp->p1];
   assert( pC!=0 );
+  assert( pC->isSorter==(pOp->opcode==OP_SorterInsert) );
   pIn2 = &aMem[pOp->p2];
   assert( pIn2->flags & MEM_Blob );
   pCrsr = pC->pCursor;
@@ -4361,13 +4486,17 @@ case OP_IdxInsert: {        /* in2 */
     assert( pC->isTable==0 );
     rc = ExpandBlob(pIn2);
     if( rc==SQLITE_OK ){
-      nKey = pIn2->n;
-      zKey = pIn2->z;
-      rc = sqlite3BtreeInsert(pCrsr, zKey, nKey, "", 0, 0, pOp->p3, 
-          ((pOp->p5 & OPFLAG_USESEEKRESULT) ? pC->seekResult : 0)
-      );
-      assert( pC->deferredMoveto==0 );
-      pC->cacheStatus = CACHE_STALE;
+      if( isSorter(pC) ){
+        rc = sqlite3VdbeSorterWrite(db, pC, pIn2);
+      }else{
+        nKey = pIn2->n;
+        zKey = pIn2->z;
+        rc = sqlite3BtreeInsert(pCrsr, zKey, nKey, "", 0, 0, pOp->p3, 
+            ((pOp->p5 & OPFLAG_USESEEKRESULT) ? pC->seekResult : 0)
+            );
+        assert( pC->deferredMoveto==0 );
+        pC->cacheStatus = CACHE_STALE;
+      }
     }
   }
   break;
@@ -5337,7 +5466,7 @@ case OP_JournalMode: {    /* out2-prerelease */
   ** in temporary storage or if the VFS does not support shared memory 
   */
   if( eNew==PAGER_JOURNALMODE_WAL
-   && (zFilename[0]==0                         /* Temp file */
+   && (sqlite3Strlen30(zFilename)==0           /* Temp file */
        || !sqlite3PagerWalSupported(pPager))   /* No shared-memory support */
   ){
     eNew = eOld;
@@ -5758,10 +5887,15 @@ case OP_VRename: {
   assert( memIsValid(pName) );
   REGISTER_TRACE(pOp->p1, pName);
   assert( pName->flags & MEM_Str );
-  rc = pVtab->pModule->xRename(pVtab, pName->z);
-  importVtabErrMsg(p, pVtab);
-  p->expired = 0;
-
+  testcase( pName->enc==SQLITE_UTF8 );
+  testcase( pName->enc==SQLITE_UTF16BE );
+  testcase( pName->enc==SQLITE_UTF16LE );
+  rc = sqlite3VdbeChangeEncoding(pName, SQLITE_UTF8);
+  if( rc==SQLITE_OK ){
+    rc = pVtab->pModule->xRename(pVtab, pName->z);
+    importVtabErrMsg(p, pVtab);
+    p->expired = 0;
+  }
   break;
 }
 #endif
diff --git a/src/vdbe.h b/src/vdbe.h
index e66ee302..948c73bc 100644
--- a/src/vdbe.h
+++ b/src/vdbe.h
@@ -61,6 +61,7 @@ struct VdbeOp {
     KeyInfo *pKeyInfo;     /* Used when p4type is P4_KEYINFO */
     int *ai;               /* Used when p4type is P4_INTARRAY */
     SubProgram *pProgram;  /* Used when p4type is P4_SUBPROGRAM */
+    int (*xAdvance)(BtCursor *, int *);
   } p4;
 #ifdef SQLITE_DEBUG
   char *zComment;          /* Comment to improve readability */
@@ -116,6 +117,7 @@ typedef struct VdbeOpList VdbeOpList;
 #define P4_INT32    (-14) /* P4 is a 32-bit signed integer */
 #define P4_INTARRAY (-15) /* P4 is a vector of 32-bit integers */
 #define P4_SUBPROGRAM  (-18) /* P4 is a pointer to a SubProgram structure */
+#define P4_ADVANCE  (-19) /* P4 is a pointer to BtreeNext() or BtreePrev() */
 
 /* When adding a P4 argument using P4_KEYINFO, a copy of the KeyInfo structure
 ** is made.  That copy is freed when the Vdbe is finalized.  But if the
@@ -173,12 +175,12 @@ int sqlite3VdbeAddOp4(Vdbe*,int,int,int,int,const char *zP4,int);
 int sqlite3VdbeAddOp4Int(Vdbe*,int,int,int,int,int);
 int sqlite3VdbeAddOpList(Vdbe*, int nOp, VdbeOpList const *aOp);
 void sqlite3VdbeAddParseSchemaOp(Vdbe*,int,char*);
-void sqlite3VdbeChangeP1(Vdbe*, int addr, int P1);
-void sqlite3VdbeChangeP2(Vdbe*, int addr, int P2);
-void sqlite3VdbeChangeP3(Vdbe*, int addr, int P3);
+void sqlite3VdbeChangeP1(Vdbe*, u32 addr, int P1);
+void sqlite3VdbeChangeP2(Vdbe*, u32 addr, int P2);
+void sqlite3VdbeChangeP3(Vdbe*, u32 addr, int P3);
 void sqlite3VdbeChangeP5(Vdbe*, u8 P5);
 void sqlite3VdbeJumpHere(Vdbe*, int addr);
-void sqlite3VdbeChangeToNoop(Vdbe*, int addr, int N);
+void sqlite3VdbeChangeToNoop(Vdbe*, int addr);
 void sqlite3VdbeChangeP4(Vdbe*, int addr, const char *zP4, int N);
 void sqlite3VdbeUsesBtree(Vdbe*, int);
 VdbeOp *sqlite3VdbeGetOp(Vdbe*, int);
@@ -210,9 +212,9 @@ void sqlite3VdbeSetVarmask(Vdbe*, int);
   char *sqlite3VdbeExpandSql(Vdbe*, const char*);
 #endif
 
-UnpackedRecord *sqlite3VdbeRecordUnpack(KeyInfo*,int,const void*,char*,int);
-void sqlite3VdbeDeleteUnpackedRecord(UnpackedRecord*);
+void sqlite3VdbeRecordUnpack(KeyInfo*,int,const void*,UnpackedRecord*);
 int sqlite3VdbeRecordCompare(int,const void*,UnpackedRecord*);
+UnpackedRecord *sqlite3VdbeAllocUnpackedRecord(KeyInfo *, char *, int, char **);
 
 #ifndef SQLITE_OMIT_TRIGGER
 void sqlite3VdbeLinkSubProgram(Vdbe *, SubProgram *);
diff --git a/src/vdbeInt.h b/src/vdbeInt.h
index 0aeb3af7..803ae163 100644
--- a/src/vdbeInt.h
+++ b/src/vdbeInt.h
@@ -30,6 +30,9 @@ typedef struct VdbeOp Op;
 */
 typedef unsigned char Bool;
 
+/* Opaque type used by code in vdbesort.c */
+typedef struct VdbeSorter VdbeSorter;
+
 /*
 ** A cursor is a pointer into a single BTree within a database file.
 ** The cursor can seek to a BTree entry with a particular key, or
@@ -56,11 +59,13 @@ struct VdbeCursor {
   Bool isTable;         /* True if a table requiring integer keys */
   Bool isIndex;         /* True if an index containing keys only - no data */
   Bool isOrdered;       /* True if the underlying table is BTREE_UNORDERED */
+  Bool isSorter;        /* True if a new-style sorter */
   sqlite3_vtab_cursor *pVtabCursor;  /* The cursor for a virtual table */
   const sqlite3_module *pModule;     /* Module for cursor pVtabCursor */
   i64 seqCount;         /* Sequence counter */
   i64 movetoTarget;     /* Argument to the deferred sqlite3BtreeMoveto() */
   i64 lastRowid;        /* Last rowid from a Next or NextIdx operation */
+  VdbeSorter *pSorter;  /* Sorter object for OP_SorterOpen cursors */
 
   /* Result of last sqlite3BtreeMoveto() done by an OP_NotExists or 
   ** OP_IsUnique opcode on this cursor. */
@@ -380,6 +385,9 @@ int sqlite3VdbeMemNumerify(Mem*);
 int sqlite3VdbeMemFromBtree(BtCursor*,int,int,int,Mem*);
 void sqlite3VdbeMemRelease(Mem *p);
 void sqlite3VdbeMemReleaseExternal(Mem *p);
+#define MemReleaseExt(X)  \
+  if((X)->flags&(MEM_Agg|MEM_Dyn|MEM_RowSet|MEM_Frame)) \
+    sqlite3VdbeMemReleaseExternal(X);
 int sqlite3VdbeMemFinalize(Mem*, FuncDef*);
 const char *sqlite3OpcodeName(int);
 int sqlite3VdbeMemGrow(Mem *pMem, int n, int preserve);
@@ -387,6 +395,25 @@ int sqlite3VdbeCloseStatement(Vdbe *, int);
 void sqlite3VdbeFrameDelete(VdbeFrame*);
 int sqlite3VdbeFrameRestore(VdbeFrame *);
 void sqlite3VdbeMemStoreType(Mem *pMem);
+int sqlite3VdbeTransferError(Vdbe *p);
+
+#ifdef SQLITE_OMIT_MERGE_SORT
+# define sqlite3VdbeSorterInit(Y,Z)      SQLITE_OK
+# define sqlite3VdbeSorterWrite(X,Y,Z)   SQLITE_OK
+# define sqlite3VdbeSorterClose(Y,Z)
+# define sqlite3VdbeSorterRowkey(Y,Z)    SQLITE_OK
+# define sqlite3VdbeSorterRewind(X,Y,Z)  SQLITE_OK
+# define sqlite3VdbeSorterNext(X,Y,Z)    SQLITE_OK
+# define sqlite3VdbeSorterCompare(X,Y,Z) SQLITE_OK
+#else
+int sqlite3VdbeSorterInit(sqlite3 *, VdbeCursor *);
+void sqlite3VdbeSorterClose(sqlite3 *, VdbeCursor *);
+int sqlite3VdbeSorterRowkey(VdbeCursor *, Mem *);
+int sqlite3VdbeSorterNext(sqlite3 *, VdbeCursor *, int *);
+int sqlite3VdbeSorterRewind(sqlite3 *, VdbeCursor *, int *);
+int sqlite3VdbeSorterWrite(sqlite3 *, VdbeCursor *, Mem *);
+int sqlite3VdbeSorterCompare(VdbeCursor *, Mem *, int *);
+#endif
 
 #if !defined(SQLITE_OMIT_SHARED_CACHE) && SQLITE_THREADSAFE>0
   void sqlite3VdbeEnter(Vdbe*);
diff --git a/src/vdbeapi.c b/src/vdbeapi.c
index a87b5c9a..adc9dba2 100644
--- a/src/vdbeapi.c
+++ b/src/vdbeapi.c
@@ -454,7 +454,7 @@ end_of_step:
     ** error has occured, then return the error code in p->rc to the
     ** caller. Set the error code in the database handle to the same value.
     */ 
-    rc = db->errCode = p->rc;
+    rc = sqlite3VdbeTransferError(p);
   }
   return (rc&db->errMask);
 }
@@ -488,7 +488,7 @@ int sqlite3_step(sqlite3_stmt *pStmt){
          && cnt++ < SQLITE_MAX_SCHEMA_RETRY
          && (rc2 = rc = sqlite3Reprepare(v))==SQLITE_OK ){
     sqlite3_reset(pStmt);
-    v->expired = 0;
+    assert( v->expired==0 );
   }
   if( rc2!=SQLITE_OK && ALWAYS(v->isPrepareV2) && ALWAYS(db->pErr) ){
     /* This case occurs after failing to recompile an sql statement. 
diff --git a/src/vdbeaux.c b/src/vdbeaux.c
index 989a8003..75250238 100644
--- a/src/vdbeaux.c
+++ b/src/vdbeaux.c
@@ -433,6 +433,12 @@ static void resolveP2Values(Vdbe *p, int *pMaxFuncArgs){
       n = pOp[-1].p1;
       if( n>nMaxArgs ) nMaxArgs = n;
 #endif
+    }else if( opcode==OP_Next || opcode==OP_SorterNext ){
+      pOp->p4.xAdvance = sqlite3BtreeNext;
+      pOp->p4type = P4_ADVANCE;
+    }else if( opcode==OP_Prev ){
+      pOp->p4.xAdvance = sqlite3BtreePrevious;
+      pOp->p4type = P4_ADVANCE;
     }
 
     if( (pOp->opflags & OPFLG_JUMP)!=0 && pOp->p2<0 ){
@@ -524,10 +530,9 @@ int sqlite3VdbeAddOpList(Vdbe *p, int nOp, VdbeOpList const *aOp){
 ** static array using sqlite3VdbeAddOpList but we want to make a
 ** few minor changes to the program.
 */
-void sqlite3VdbeChangeP1(Vdbe *p, int addr, int val){
+void sqlite3VdbeChangeP1(Vdbe *p, u32 addr, int val){
   assert( p!=0 );
-  assert( addr>=0 );
-  if( p->nOp>addr ){
+  if( ((u32)p->nOp)>addr ){
     p->aOp[addr].p1 = val;
   }
 }
@@ -536,10 +541,9 @@ void sqlite3VdbeChangeP1(Vdbe *p, int addr, int val){
 ** Change the value of the P2 operand for a specific instruction.
 ** This routine is useful for setting a jump destination.
 */
-void sqlite3VdbeChangeP2(Vdbe *p, int addr, int val){
+void sqlite3VdbeChangeP2(Vdbe *p, u32 addr, int val){
   assert( p!=0 );
-  assert( addr>=0 );
-  if( p->nOp>addr ){
+  if( ((u32)p->nOp)>addr ){
     p->aOp[addr].p2 = val;
   }
 }
@@ -547,10 +551,9 @@ void sqlite3VdbeChangeP2(Vdbe *p, int addr, int val){
 /*
 ** Change the value of the P3 operand for a specific instruction.
 */
-void sqlite3VdbeChangeP3(Vdbe *p, int addr, int val){
+void sqlite3VdbeChangeP3(Vdbe *p, u32 addr, int val){
   assert( p!=0 );
-  assert( addr>=0 );
-  if( p->nOp>addr ){
+  if( ((u32)p->nOp)>addr ){
     p->aOp[addr].p3 = val;
   }
 }
@@ -572,8 +575,8 @@ void sqlite3VdbeChangeP5(Vdbe *p, u8 val){
 ** the address of the next instruction to be coded.
 */
 void sqlite3VdbeJumpHere(Vdbe *p, int addr){
-  assert( addr>=0 );
-  sqlite3VdbeChangeP2(p, addr, p->nOp);
+  assert( addr>=0 || p->db->mallocFailed );
+  if( addr>=0 ) sqlite3VdbeChangeP2(p, addr, p->nOp);
 }
 
 
@@ -667,18 +670,15 @@ void sqlite3VdbeLinkSubProgram(Vdbe *pVdbe, SubProgram *p){
 }
 
 /*
-** Change N opcodes starting at addr to No-ops.
+** Change the opcode at addr into OP_Noop
 */
-void sqlite3VdbeChangeToNoop(Vdbe *p, int addr, int N){
+void sqlite3VdbeChangeToNoop(Vdbe *p, int addr){
   if( p->aOp ){
     VdbeOp *pOp = &p->aOp[addr];
     sqlite3 *db = p->db;
-    while( N-- ){
-      freeP4(db, pOp->p4type, pOp->p4.p);
-      memset(pOp, 0, sizeof(pOp[0]));
-      pOp->opcode = OP_Noop;
-      pOp++;
-    }
+    freeP4(db, pOp->p4type, pOp->p4.p);
+    memset(pOp, 0, sizeof(pOp[0]));
+    pOp->opcode = OP_Noop;
   }
 }
 
@@ -781,30 +781,29 @@ void sqlite3VdbeChangeP4(Vdbe *p, int addr, const char *zP4, int n){
 ** makes the code easier to read during debugging.  None of this happens
 ** in a production build.
 */
-void sqlite3VdbeComment(Vdbe *p, const char *zFormat, ...){
-  va_list ap;
-  if( !p ) return;
+static void vdbeVComment(Vdbe *p, const char *zFormat, va_list ap){
   assert( p->nOp>0 || p->aOp==0 );
   assert( p->aOp==0 || p->aOp[p->nOp-1].zComment==0 || p->db->mallocFailed );
   if( p->nOp ){
-    char **pz = &p->aOp[p->nOp-1].zComment;
+    assert( p->aOp );
+    sqlite3DbFree(p->db, p->aOp[p->nOp-1].zComment);
+    p->aOp[p->nOp-1].zComment = sqlite3VMPrintf(p->db, zFormat, ap);
+  }
+}
+void sqlite3VdbeComment(Vdbe *p, const char *zFormat, ...){
+  va_list ap;
+  if( p ){
     va_start(ap, zFormat);
-    sqlite3DbFree(p->db, *pz);
-    *pz = sqlite3VMPrintf(p->db, zFormat, ap);
+    vdbeVComment(p, zFormat, ap);
     va_end(ap);
   }
 }
 void sqlite3VdbeNoopComment(Vdbe *p, const char *zFormat, ...){
   va_list ap;
-  if( !p ) return;
-  sqlite3VdbeAddOp0(p, OP_Noop);
-  assert( p->nOp>0 || p->aOp==0 );
-  assert( p->aOp==0 || p->aOp[p->nOp-1].zComment==0 || p->db->mallocFailed );
-  if( p->nOp ){
-    char **pz = &p->aOp[p->nOp-1].zComment;
+  if( p ){
+    sqlite3VdbeAddOp0(p, OP_Noop);
     va_start(ap, zFormat);
-    sqlite3DbFree(p->db, *pz);
-    *pz = sqlite3VMPrintf(p->db, zFormat, ap);
+    vdbeVComment(p, zFormat, ap);
     va_end(ap);
   }
 }
@@ -834,7 +833,7 @@ void sqlite3VdbeNoopComment(Vdbe *p, const char *zFormat, ...){
 VdbeOp *sqlite3VdbeGetOp(Vdbe *p, int addr){
   /* C89 specifies that the constant "dummy" will be initialized to all
   ** zeros, which is correct.  MSVC generates a warning, nevertheless. */
-  static const VdbeOp dummy;  /* Ignore the MSVC warning about no initializer */
+  static VdbeOp dummy;  /* Ignore the MSVC warning about no initializer */
   assert( p->magic==VDBE_MAGIC_INIT );
   if( addr<0 ){
 #ifdef SQLITE_OMIT_TRACE
@@ -942,6 +941,10 @@ static char *displayP4(Op *pOp, char *zTemp, int nTemp){
       sqlite3_snprintf(nTemp, zTemp, "program");
       break;
     }
+    case P4_ADVANCE: {
+      zTemp[0] = 0;
+      break;
+    }
     default: {
       zP4 = pOp->p4.z;
       if( zP4==0 ){
@@ -1138,7 +1141,7 @@ int sqlite3VdbeList(
   sqlite3 *db = p->db;                 /* The database connection */
   int i;                               /* Loop counter */
   int rc = SQLITE_OK;                  /* Return code */
-  Mem *pMem = p->pResultSet = &p->aMem[1];  /* First Mem of result set */
+  Mem *pMem = &p->aMem[1];             /* First Mem of result set */
 
   assert( p->explain );
   assert( p->magic==VDBE_MAGIC_RUN );
@@ -1149,6 +1152,7 @@ int sqlite3VdbeList(
   ** sqlite3_column_text16(), causing a translation to UTF-16 encoding.
   */
   releaseMemArray(pMem, 8);
+  p->pResultSet = 0;
 
   if( p->rc==SQLITE_NOMEM ){
     /* This happens if a malloc() inside a call to sqlite3_column_text() or
@@ -1303,6 +1307,7 @@ int sqlite3VdbeList(
     }
 
     p->nResColumn = 8 - 4*(p->explain-1);
+    p->pResultSet = &p->aMem[1];
     p->rc = SQLITE_OK;
     rc = SQLITE_ROW;
   }
@@ -1565,6 +1570,7 @@ void sqlite3VdbeFreeCursor(Vdbe *p, VdbeCursor *pCx){
   if( pCx==0 ){
     return;
   }
+  sqlite3VdbeSorterClose(p->db, pCx);
   if( pCx->pBt ){
     sqlite3BtreeClose(pCx->pBt);
     /* The pCx->pCursor will be close automatically, if it exists, by
@@ -2304,6 +2310,30 @@ void sqlite3VdbeResetStepResult(Vdbe *p){
   p->rc = SQLITE_OK;
 }
 
+/*
+** Copy the error code and error message belonging to the VDBE passed
+** as the first argument to its database handle (so that they will be 
+** returned by calls to sqlite3_errcode() and sqlite3_errmsg()).
+**
+** This function does not clear the VDBE error code or message, just
+** copies them to the database handle.
+*/
+int sqlite3VdbeTransferError(Vdbe *p){
+  sqlite3 *db = p->db;
+  int rc = p->rc;
+  if( p->zErrMsg ){
+    u8 mallocFailed = db->mallocFailed;
+    sqlite3BeginBenignMalloc();
+    sqlite3ValueSetStr(db->pErr, -1, p->zErrMsg, SQLITE_UTF8, SQLITE_TRANSIENT);
+    sqlite3EndBenignMalloc();
+    db->mallocFailed = mallocFailed;
+    db->errCode = rc;
+  }else{
+    sqlite3Error(db, rc, 0);
+  }
+  return rc;
+}
+
 /*
 ** Clean up a VDBE after execution but do not delete the VDBE just yet.
 ** Write any error messages into *pzErrMsg.  Return the result code.
@@ -2331,18 +2361,9 @@ int sqlite3VdbeReset(Vdbe *p){
   ** instructions yet, leave the main database error information unchanged.
   */
   if( p->pc>=0 ){
-    if( p->zErrMsg ){
-      sqlite3BeginBenignMalloc();
-      sqlite3ValueSetStr(db->pErr,-1,p->zErrMsg,SQLITE_UTF8,SQLITE_TRANSIENT);
-      sqlite3EndBenignMalloc();
-      db->errCode = p->rc;
-      sqlite3DbFree(db, p->zErrMsg);
-      p->zErrMsg = 0;
-    }else if( p->rc ){
-      sqlite3Error(db, p->rc, 0);
-    }else{
-      sqlite3Error(db, SQLITE_OK, 0);
-    }
+    sqlite3VdbeTransferError(p);
+    sqlite3DbFree(db, p->zErrMsg);
+    p->zErrMsg = 0;
     if( p->runOnlyOnce ) p->expired = 1;
   }else if( p->rc && p->expired ){
     /* The expired flag was set on the VDBE before the first call
@@ -2822,57 +2843,70 @@ u32 sqlite3VdbeSerialGet(
   return 0;
 }
 
-
 /*
-** Given the nKey-byte encoding of a record in pKey[], parse the
-** record into a UnpackedRecord structure.  Return a pointer to
-** that structure.
+** This routine is used to allocate sufficient space for an UnpackedRecord
+** structure large enough to be used with sqlite3VdbeRecordUnpack() if
+** the first argument is a pointer to KeyInfo structure pKeyInfo.
 **
-** The calling function might provide szSpace bytes of memory
-** space at pSpace.  This space can be used to hold the returned
-** VDbeParsedRecord structure if it is large enough.  If it is
-** not big enough, space is obtained from sqlite3_malloc().
+** The space is either allocated using sqlite3DbMallocRaw() or from within
+** the unaligned buffer passed via the second and third arguments (presumably
+** stack space). If the former, then *ppFree is set to a pointer that should
+** be eventually freed by the caller using sqlite3DbFree(). Or, if the 
+** allocation comes from the pSpace/szSpace buffer, *ppFree is set to NULL
+** before returning.
 **
-** The returned structure should be closed by a call to
-** sqlite3VdbeDeleteUnpackedRecord().
-*/ 
-UnpackedRecord *sqlite3VdbeRecordUnpack(
-  KeyInfo *pKeyInfo,     /* Information about the record format */
-  int nKey,              /* Size of the binary record */
-  const void *pKey,      /* The binary record */
-  char *pSpace,          /* Unaligned space available to hold the object */
-  int szSpace            /* Size of pSpace[] in bytes */
+** If an OOM error occurs, NULL is returned.
+*/
+UnpackedRecord *sqlite3VdbeAllocUnpackedRecord(
+  KeyInfo *pKeyInfo,              /* Description of the record */
+  char *pSpace,                   /* Unaligned space available */
+  int szSpace,                    /* Size of pSpace[] in bytes */
+  char **ppFree                   /* OUT: Caller should free this pointer */
 ){
-  const unsigned char *aKey = (const unsigned char *)pKey;
-  UnpackedRecord *p;  /* The unpacked record that we will return */
-  int nByte;          /* Memory space needed to hold p, in bytes */
-  int d;
-  u32 idx;
-  u16 u;              /* Unsigned loop counter */
-  u32 szHdr;
-  Mem *pMem;
-  int nOff;           /* Increase pSpace by this much to 8-byte align it */
-  
-  /*
-  ** We want to shift the pointer pSpace up such that it is 8-byte aligned.
+  UnpackedRecord *p;              /* Unpacked record to return */
+  int nOff;                       /* Increment pSpace by nOff to align it */
+  int nByte;                      /* Number of bytes required for *p */
+
+  /* We want to shift the pointer pSpace up such that it is 8-byte aligned.
   ** Thus, we need to calculate a value, nOff, between 0 and 7, to shift 
   ** it by.  If pSpace is already 8-byte aligned, nOff should be zero.
   */
   nOff = (8 - (SQLITE_PTR_TO_INT(pSpace) & 7)) & 7;
-  pSpace += nOff;
-  szSpace -= nOff;
   nByte = ROUND8(sizeof(UnpackedRecord)) + sizeof(Mem)*(pKeyInfo->nField+1);
-  if( nByte>szSpace ){
-    p = sqlite3DbMallocRaw(pKeyInfo->db, nByte);
-    if( p==0 ) return 0;
-    p->flags = UNPACKED_NEED_FREE | UNPACKED_NEED_DESTROY;
+  if( nByte>szSpace+nOff ){
+    p = (UnpackedRecord *)sqlite3DbMallocRaw(pKeyInfo->db, nByte);
+    *ppFree = (char *)p;
+    if( !p ) return 0;
   }else{
-    p = (UnpackedRecord*)pSpace;
-    p->flags = UNPACKED_NEED_DESTROY;
+    p = (UnpackedRecord*)&pSpace[nOff];
+    *ppFree = 0;
   }
+
+  p->aMem = (Mem*)&((char*)p)[ROUND8(sizeof(UnpackedRecord))];
   p->pKeyInfo = pKeyInfo;
   p->nField = pKeyInfo->nField + 1;
-  p->aMem = pMem = (Mem*)&((char*)p)[ROUND8(sizeof(UnpackedRecord))];
+  return p;
+}
+
+/*
+** Given the nKey-byte encoding of a record in pKey[], populate the 
+** UnpackedRecord structure indicated by the fourth argument with the
+** contents of the decoded record.
+*/ 
+void sqlite3VdbeRecordUnpack(
+  KeyInfo *pKeyInfo,     /* Information about the record format */
+  int nKey,              /* Size of the binary record */
+  const void *pKey,      /* The binary record */
+  UnpackedRecord *p      /* Populate this structure before returning. */
+){
+  const unsigned char *aKey = (const unsigned char *)pKey;
+  int d; 
+  u32 idx;                        /* Offset in aKey[] to read from */
+  u16 u;                          /* Unsigned loop counter */
+  u32 szHdr;
+  Mem *pMem = p->aMem;
+
+  p->flags = 0;
   assert( EIGHT_BYTE_ALIGNMENT(pMem) );
   idx = getVarint32(aKey, szHdr);
   d = szHdr;
@@ -2891,31 +2925,6 @@ UnpackedRecord *sqlite3VdbeRecordUnpack(
   }
   assert( u<=pKeyInfo->nField + 1 );
   p->nField = u;
-  return (void*)p;
-}
-
-/*
-** This routine destroys a UnpackedRecord object.
-*/
-void sqlite3VdbeDeleteUnpackedRecord(UnpackedRecord *p){
-#ifdef SQLITE_DEBUG
-  int i;
-  Mem *pMem;
-
-  assert( p!=0 );
-  assert( p->flags & UNPACKED_NEED_DESTROY );
-  for(i=0, pMem=p->aMem; i<p->nField; i++, pMem++){
-    /* The unpacked record is always constructed by the
-    ** sqlite3VdbeUnpackRecord() function above, which makes all
-    ** strings and blobs static.  And none of the elements are
-    ** ever transformed, so there is never anything to delete.
-    */
-    if( NEVER(pMem->zMalloc) ) sqlite3VdbeMemRelease(pMem);
-  }
-#endif
-  if( p->flags & UNPACKED_NEED_FREE ){
-    sqlite3DbFree(p->pKeyInfo->db, p);
-  }
 }
 
 /*
@@ -3069,7 +3078,7 @@ int sqlite3VdbeIdxRowid(sqlite3 *db, BtCursor *pCur, i64 *rowid){
   ** this code can safely assume that nCellKey is 32-bits  
   */
   assert( sqlite3BtreeCursorIsValid(pCur) );
-  rc = sqlite3BtreeKeySize(pCur, &nCellKey);
+  VVA_ONLY(rc =) sqlite3BtreeKeySize(pCur, &nCellKey);
   assert( rc==SQLITE_OK );     /* pCur is always valid so KeySize cannot fail */
   assert( (nCellKey & SQLITE_MAX_U32)==(u64)nCellKey );
 
@@ -3144,7 +3153,7 @@ int sqlite3VdbeIdxKeyCompare(
   Mem m;
 
   assert( sqlite3BtreeCursorIsValid(pCur) );
-  rc = sqlite3BtreeKeySize(pCur, &nCellKey);
+  VVA_ONLY(rc =) sqlite3BtreeKeySize(pCur, &nCellKey);
   assert( rc==SQLITE_OK );    /* pCur is always valid so KeySize cannot fail */
   /* nCellKey will always be between 0 and 0xffffffff because of the say
   ** that btreeParseCellPtr() and sqlite3GetVarint32() are implemented */
diff --git a/src/vdbeblob.c b/src/vdbeblob.c
index a8728e6d..ae77a47b 100644
--- a/src/vdbeblob.c
+++ b/src/vdbeblob.c
@@ -273,7 +273,7 @@ int sqlite3_blob_open(
 
       /* Configure the OP_TableLock instruction */
 #ifdef SQLITE_OMIT_SHARED_CACHE
-      sqlite3VdbeChangeToNoop(v, 2, 1);
+      sqlite3VdbeChangeToNoop(v, 2);
 #else
       sqlite3VdbeChangeP1(v, 2, iDb);
       sqlite3VdbeChangeP2(v, 2, pTab->tnum);
@@ -283,7 +283,7 @@ int sqlite3_blob_open(
 
       /* Remove either the OP_OpenWrite or OpenRead. Set the P2 
       ** parameter of the other to pTab->tnum.  */
-      sqlite3VdbeChangeToNoop(v, 4 - flags, 1);
+      sqlite3VdbeChangeToNoop(v, 4 - flags);
       sqlite3VdbeChangeP2(v, 3 + flags, pTab->tnum);
       sqlite3VdbeChangeP3(v, 3 + flags, iDb);
 
diff --git a/src/vdbemem.c b/src/vdbemem.c
index 882c6863..e6e91562 100644
--- a/src/vdbemem.c
+++ b/src/vdbemem.c
@@ -271,24 +271,18 @@ int sqlite3VdbeMemFinalize(Mem *pMem, FuncDef *pFunc){
 */
 void sqlite3VdbeMemReleaseExternal(Mem *p){
   assert( p->db==0 || sqlite3_mutex_held(p->db->mutex) );
-  testcase( p->flags & MEM_Agg );
-  testcase( p->flags & MEM_Dyn );
-  testcase( p->flags & MEM_RowSet );
-  testcase( p->flags & MEM_Frame );
-  if( p->flags&(MEM_Agg|MEM_Dyn|MEM_RowSet|MEM_Frame) ){
-    if( p->flags&MEM_Agg ){
-      sqlite3VdbeMemFinalize(p, p->u.pDef);
-      assert( (p->flags & MEM_Agg)==0 );
-      sqlite3VdbeMemRelease(p);
-    }else if( p->flags&MEM_Dyn && p->xDel ){
-      assert( (p->flags&MEM_RowSet)==0 );
-      p->xDel((void *)p->z);
-      p->xDel = 0;
-    }else if( p->flags&MEM_RowSet ){
-      sqlite3RowSetClear(p->u.pRowSet);
-    }else if( p->flags&MEM_Frame ){
-      sqlite3VdbeMemSetNull(p);
-    }
+  if( p->flags&MEM_Agg ){
+    sqlite3VdbeMemFinalize(p, p->u.pDef);
+    assert( (p->flags & MEM_Agg)==0 );
+    sqlite3VdbeMemRelease(p);
+  }else if( p->flags&MEM_Dyn && p->xDel ){
+    assert( (p->flags&MEM_RowSet)==0 );
+    p->xDel((void *)p->z);
+    p->xDel = 0;
+  }else if( p->flags&MEM_RowSet ){
+    sqlite3RowSetClear(p->u.pRowSet);
+  }else if( p->flags&MEM_Frame ){
+    sqlite3VdbeMemSetNull(p);
   }
 }
 
@@ -298,7 +292,7 @@ void sqlite3VdbeMemReleaseExternal(Mem *p){
 ** (Mem.type==SQLITE_TEXT).
 */
 void sqlite3VdbeMemRelease(Mem *p){
-  sqlite3VdbeMemReleaseExternal(p);
+  MemReleaseExt(p);
   sqlite3DbFree(p->db, p->zMalloc);
   p->z = 0;
   p->zMalloc = 0;
@@ -620,7 +614,7 @@ void sqlite3VdbeMemPrepareToChange(Vdbe *pVdbe, Mem *pMem){
 */
 void sqlite3VdbeMemShallowCopy(Mem *pTo, const Mem *pFrom, int srcType){
   assert( (pFrom->flags & MEM_RowSet)==0 );
-  sqlite3VdbeMemReleaseExternal(pTo);
+  MemReleaseExt(pTo);
   memcpy(pTo, pFrom, MEMCELLSIZE);
   pTo->xDel = 0;
   if( (pFrom->flags&MEM_Static)==0 ){
@@ -638,7 +632,7 @@ int sqlite3VdbeMemCopy(Mem *pTo, const Mem *pFrom){
   int rc = SQLITE_OK;
 
   assert( (pFrom->flags & MEM_RowSet)==0 );
-  sqlite3VdbeMemReleaseExternal(pTo);
+  MemReleaseExt(pTo);
   memcpy(pTo, pFrom, MEMCELLSIZE);
   pTo->flags &= ~MEM_Dyn;
 
@@ -1032,11 +1026,11 @@ int sqlite3ValueFromExpr(
   }
   op = pExpr->op;
 
-  /* op can only be TK_REGISTER if we have compiled with SQLITE_ENABLE_STAT2.
+  /* op can only be TK_REGISTER if we have compiled with SQLITE_ENABLE_STAT3.
   ** The ifdef here is to enable us to achieve 100% branch test coverage even
-  ** when SQLITE_ENABLE_STAT2 is omitted.
+  ** when SQLITE_ENABLE_STAT3 is omitted.
   */
-#ifdef SQLITE_ENABLE_STAT2
+#ifdef SQLITE_ENABLE_STAT3
   if( op==TK_REGISTER ) op = pExpr->op2;
 #else
   if( NEVER(op==TK_REGISTER) ) op = pExpr->op2;
diff --git a/src/vdbesort.c b/src/vdbesort.c
new file mode 100644
index 00000000..c4499970
--- /dev/null
+++ b/src/vdbesort.c
@@ -0,0 +1,882 @@
+/*
+** 2011 July 9
+**
+** The author disclaims copyright to this source code.  In place of
+** a legal notice, here is a blessing:
+**
+**    May you do good and not evil.
+**    May you find forgiveness for yourself and forgive others.
+**    May you share freely, never taking more than you give.
+**
+*************************************************************************
+** This file contains code for the VdbeSorter object, used in concert with
+** a VdbeCursor to sort large numbers of keys (as may be required, for
+** example, by CREATE INDEX statements on tables too large to fit in main
+** memory).
+*/
+
+#include "sqliteInt.h"
+#include "vdbeInt.h"
+
+#ifndef SQLITE_OMIT_MERGE_SORT
+
+typedef struct VdbeSorterIter VdbeSorterIter;
+typedef struct SorterRecord SorterRecord;
+
+/*
+** NOTES ON DATA STRUCTURE USED FOR N-WAY MERGES:
+**
+** As keys are added to the sorter, they are written to disk in a series
+** of sorted packed-memory-arrays (PMAs). The size of each PMA is roughly
+** the same as the cache-size allowed for temporary databases. In order
+** to allow the caller to extract keys from the sorter in sorted order,
+** all PMAs currently stored on disk must be merged together. This comment
+** describes the data structure used to do so. The structure supports 
+** merging any number of arrays in a single pass with no redundant comparison 
+** operations.
+**
+** The aIter[] array contains an iterator for each of the PMAs being merged.
+** An aIter[] iterator either points to a valid key or else is at EOF. For 
+** the purposes of the paragraphs below, we assume that the array is actually 
+** N elements in size, where N is the smallest power of 2 greater to or equal 
+** to the number of iterators being merged. The extra aIter[] elements are 
+** treated as if they are empty (always at EOF).
+**
+** The aTree[] array is also N elements in size. The value of N is stored in
+** the VdbeSorter.nTree variable.
+**
+** The final (N/2) elements of aTree[] contain the results of comparing
+** pairs of iterator keys together. Element i contains the result of 
+** comparing aIter[2*i-N] and aIter[2*i-N+1]. Whichever key is smaller, the
+** aTree element is set to the index of it. 
+**
+** For the purposes of this comparison, EOF is considered greater than any
+** other key value. If the keys are equal (only possible with two EOF
+** values), it doesn't matter which index is stored.
+**
+** The (N/4) elements of aTree[] that preceed the final (N/2) described 
+** above contains the index of the smallest of each block of 4 iterators.
+** And so on. So that aTree[1] contains the index of the iterator that 
+** currently points to the smallest key value. aTree[0] is unused.
+**
+** Example:
+**
+**     aIter[0] -> Banana
+**     aIter[1] -> Feijoa
+**     aIter[2] -> Elderberry
+**     aIter[3] -> Currant
+**     aIter[4] -> Grapefruit
+**     aIter[5] -> Apple
+**     aIter[6] -> Durian
+**     aIter[7] -> EOF
+**
+**     aTree[] = { X, 5   0, 5    0, 3, 5, 6 }
+**
+** The current element is "Apple" (the value of the key indicated by 
+** iterator 5). When the Next() operation is invoked, iterator 5 will
+** be advanced to the next key in its segment. Say the next key is
+** "Eggplant":
+**
+**     aIter[5] -> Eggplant
+**
+** The contents of aTree[] are updated first by comparing the new iterator
+** 5 key to the current key of iterator 4 (still "Grapefruit"). The iterator
+** 5 value is still smaller, so aTree[6] is set to 5. And so on up the tree.
+** The value of iterator 6 - "Durian" - is now smaller than that of iterator
+** 5, so aTree[3] is set to 6. Key 0 is smaller than key 6 (Banana<Durian),
+** so the value written into element 1 of the array is 0. As follows:
+**
+**     aTree[] = { X, 0   0, 6    0, 3, 5, 6 }
+**
+** In other words, each time we advance to the next sorter element, log2(N)
+** key comparison operations are required, where N is the number of segments
+** being merged (rounded up to the next power of 2).
+*/
+struct VdbeSorter {
+  int nInMemory;                  /* Current size of pRecord list as PMA */
+  int nTree;                      /* Used size of aTree/aIter (power of 2) */
+  VdbeSorterIter *aIter;          /* Array of iterators to merge */
+  int *aTree;                     /* Current state of incremental merge */
+  i64 iWriteOff;                  /* Current write offset within file pTemp1 */
+  i64 iReadOff;                   /* Current read offset within file pTemp1 */
+  sqlite3_file *pTemp1;           /* PMA file 1 */
+  int nPMA;                       /* Number of PMAs stored in pTemp1 */
+  SorterRecord *pRecord;          /* Head of in-memory record list */
+  int mnPmaSize;                  /* Minimum PMA size, in bytes */
+  int mxPmaSize;                  /* Maximum PMA size, in bytes.  0==no limit */
+  UnpackedRecord *pUnpacked;      /* Used to unpack keys */
+};
+
+/*
+** The following type is an iterator for a PMA. It caches the current key in 
+** variables nKey/aKey. If the iterator is at EOF, pFile==0.
+*/
+struct VdbeSorterIter {
+  i64 iReadOff;                   /* Current read offset */
+  i64 iEof;                       /* 1 byte past EOF for this iterator */
+  sqlite3_file *pFile;            /* File iterator is reading from */
+  int nAlloc;                     /* Bytes of space at aAlloc */
+  u8 *aAlloc;                     /* Allocated space */
+  int nKey;                       /* Number of bytes in key */
+  u8 *aKey;                       /* Pointer to current key */
+};
+
+/*
+** A structure to store a single record. All in-memory records are connected
+** together into a linked list headed at VdbeSorter.pRecord using the 
+** SorterRecord.pNext pointer.
+*/
+struct SorterRecord {
+  void *pVal;
+  int nVal;
+  SorterRecord *pNext;
+};
+
+/* Minimum allowable value for the VdbeSorter.nWorking variable */
+#define SORTER_MIN_WORKING 10
+
+/* Maximum number of segments to merge in a single pass. */
+#define SORTER_MAX_MERGE_COUNT 16
+
+/*
+** Free all memory belonging to the VdbeSorterIter object passed as the second
+** argument. All structure fields are set to zero before returning.
+*/
+static void vdbeSorterIterZero(sqlite3 *db, VdbeSorterIter *pIter){
+  sqlite3DbFree(db, pIter->aAlloc);
+  memset(pIter, 0, sizeof(VdbeSorterIter));
+}
+
+/*
+** Advance iterator pIter to the next key in its PMA. Return SQLITE_OK if
+** no error occurs, or an SQLite error code if one does.
+*/
+static int vdbeSorterIterNext(
+  sqlite3 *db,                    /* Database handle (for sqlite3DbMalloc() ) */
+  VdbeSorterIter *pIter           /* Iterator to advance */
+){
+  int rc;                         /* Return Code */
+  int nRead;                      /* Number of bytes read */
+  int nRec = 0;                   /* Size of record in bytes */
+  int iOff = 0;                   /* Size of serialized size varint in bytes */
+
+  assert( pIter->iEof>=pIter->iReadOff );
+  if( pIter->iEof-pIter->iReadOff>5 ){
+    nRead = 5;
+  }else{
+    nRead = (int)(pIter->iEof - pIter->iReadOff);
+  }
+  if( nRead<=0 ){
+    /* This is an EOF condition */
+    vdbeSorterIterZero(db, pIter);
+    return SQLITE_OK;
+  }
+
+  rc = sqlite3OsRead(pIter->pFile, pIter->aAlloc, nRead, pIter->iReadOff);
+  if( rc==SQLITE_OK ){
+    iOff = getVarint32(pIter->aAlloc, nRec);
+    if( (iOff+nRec)>nRead ){
+      int nRead2;                   /* Number of extra bytes to read */
+      if( (iOff+nRec)>pIter->nAlloc ){
+        int nNew = pIter->nAlloc*2;
+        while( (iOff+nRec)>nNew ) nNew = nNew*2;
+        pIter->aAlloc = sqlite3DbReallocOrFree(db, pIter->aAlloc, nNew);
+        if( !pIter->aAlloc ) return SQLITE_NOMEM;
+        pIter->nAlloc = nNew;
+      }
+  
+      nRead2 = iOff + nRec - nRead;
+      rc = sqlite3OsRead(
+          pIter->pFile, &pIter->aAlloc[nRead], nRead2, pIter->iReadOff+nRead
+      );
+    }
+  }
+
+  assert( rc!=SQLITE_OK || nRec>0 );
+  pIter->iReadOff += iOff+nRec;
+  pIter->nKey = nRec;
+  pIter->aKey = &pIter->aAlloc[iOff];
+  return rc;
+}
+
+/*
+** Write a single varint, value iVal, to file-descriptor pFile. Return
+** SQLITE_OK if successful, or an SQLite error code if some error occurs.
+**
+** The value of *piOffset when this function is called is used as the byte
+** offset in file pFile to write to. Before returning, *piOffset is 
+** incremented by the number of bytes written.
+*/
+static int vdbeSorterWriteVarint(
+  sqlite3_file *pFile,            /* File to write to */
+  i64 iVal,                       /* Value to write as a varint */
+  i64 *piOffset                   /* IN/OUT: Write offset in file pFile */
+){
+  u8 aVarint[9];                  /* Buffer large enough for a varint */
+  int nVarint;                    /* Number of used bytes in varint */
+  int rc;                         /* Result of write() call */
+
+  nVarint = sqlite3PutVarint(aVarint, iVal);
+  rc = sqlite3OsWrite(pFile, aVarint, nVarint, *piOffset);
+  *piOffset += nVarint;
+
+  return rc;
+}
+
+/*
+** Read a single varint from file-descriptor pFile. Return SQLITE_OK if
+** successful, or an SQLite error code if some error occurs.
+**
+** The value of *piOffset when this function is called is used as the
+** byte offset in file pFile from whence to read the varint. If successful
+** (i.e. if no IO error occurs), then *piOffset is set to the offset of
+** the first byte past the end of the varint before returning. *piVal is
+** set to the integer value read. If an error occurs, the final values of
+** both *piOffset and *piVal are undefined.
+*/
+static int vdbeSorterReadVarint(
+  sqlite3_file *pFile,            /* File to read from */
+  i64 *piOffset,                  /* IN/OUT: Read offset in pFile */
+  i64 *piVal                      /* OUT: Value read from file */
+){
+  u8 aVarint[9];                  /* Buffer large enough for a varint */
+  i64 iOff = *piOffset;           /* Offset in file to read from */
+  int rc;                         /* Return code */
+
+  rc = sqlite3OsRead(pFile, aVarint, 9, iOff);
+  if( rc==SQLITE_OK ){
+    *piOffset += getVarint(aVarint, (u64 *)piVal);
+  }
+
+  return rc;
+}
+
+/*
+** Initialize iterator pIter to scan through the PMA stored in file pFile
+** starting at offset iStart and ending at offset iEof-1. This function 
+** leaves the iterator pointing to the first key in the PMA (or EOF if the 
+** PMA is empty).
+*/
+static int vdbeSorterIterInit(
+  sqlite3 *db,                    /* Database handle */
+  VdbeSorter *pSorter,            /* Sorter object */
+  i64 iStart,                     /* Start offset in pFile */
+  VdbeSorterIter *pIter,          /* Iterator to populate */
+  i64 *pnByte                     /* IN/OUT: Increment this value by PMA size */
+){
+  int rc;
+
+  assert( pSorter->iWriteOff>iStart );
+  assert( pIter->aAlloc==0 );
+  pIter->pFile = pSorter->pTemp1;
+  pIter->iReadOff = iStart;
+  pIter->nAlloc = 128;
+  pIter->aAlloc = (u8 *)sqlite3DbMallocRaw(db, pIter->nAlloc);
+  if( !pIter->aAlloc ){
+    rc = SQLITE_NOMEM;
+  }else{
+    i64 nByte;                         /* Total size of PMA in bytes */
+    rc = vdbeSorterReadVarint(pSorter->pTemp1, &pIter->iReadOff, &nByte);
+    *pnByte += nByte;
+    pIter->iEof = pIter->iReadOff + nByte;
+  }
+  if( rc==SQLITE_OK ){
+    rc = vdbeSorterIterNext(db, pIter);
+  }
+  return rc;
+}
+
+
+/*
+** Compare key1 (buffer pKey1, size nKey1 bytes) with key2 (buffer pKey2, 
+** size nKey2 bytes).  Argument pKeyInfo supplies the collation functions
+** used by the comparison. If an error occurs, return an SQLite error code.
+** Otherwise, return SQLITE_OK and set *pRes to a negative, zero or positive
+** value, depending on whether key1 is smaller, equal to or larger than key2.
+**
+** If the bOmitRowid argument is non-zero, assume both keys end in a rowid
+** field. For the purposes of the comparison, ignore it. Also, if bOmitRowid
+** is true and key1 contains even a single NULL value, it is considered to
+** be less than key2. Even if key2 also contains NULL values.
+**
+** If pKey2 is passed a NULL pointer, then it is assumed that the pCsr->aSpace
+** has been allocated and contains an unpacked record that is used as key2.
+*/
+static void vdbeSorterCompare(
+  VdbeCursor *pCsr,               /* Cursor object (for pKeyInfo) */
+  int bOmitRowid,                 /* Ignore rowid field at end of keys */
+  void *pKey1, int nKey1,         /* Left side of comparison */
+  void *pKey2, int nKey2,         /* Right side of comparison */
+  int *pRes                       /* OUT: Result of comparison */
+){
+  KeyInfo *pKeyInfo = pCsr->pKeyInfo;
+  VdbeSorter *pSorter = pCsr->pSorter;
+  UnpackedRecord *r2 = pSorter->pUnpacked;
+  int i;
+
+  if( pKey2 ){
+    sqlite3VdbeRecordUnpack(pKeyInfo, nKey2, pKey2, r2);
+  }
+
+  if( bOmitRowid ){
+    r2->nField = pKeyInfo->nField;
+    assert( r2->nField>0 );
+    for(i=0; i<r2->nField; i++){
+      if( r2->aMem[i].flags & MEM_Null ){
+        *pRes = -1;
+        return;
+      }
+    }
+    r2->flags |= UNPACKED_PREFIX_MATCH;
+  }
+
+  *pRes = sqlite3VdbeRecordCompare(nKey1, pKey1, r2);
+}
+
+/*
+** This function is called to compare two iterator keys when merging 
+** multiple b-tree segments. Parameter iOut is the index of the aTree[] 
+** value to recalculate.
+*/
+static int vdbeSorterDoCompare(VdbeCursor *pCsr, int iOut){
+  VdbeSorter *pSorter = pCsr->pSorter;
+  int i1;
+  int i2;
+  int iRes;
+  VdbeSorterIter *p1;
+  VdbeSorterIter *p2;
+
+  assert( iOut<pSorter->nTree && iOut>0 );
+
+  if( iOut>=(pSorter->nTree/2) ){
+    i1 = (iOut - pSorter->nTree/2) * 2;
+    i2 = i1 + 1;
+  }else{
+    i1 = pSorter->aTree[iOut*2];
+    i2 = pSorter->aTree[iOut*2+1];
+  }
+
+  p1 = &pSorter->aIter[i1];
+  p2 = &pSorter->aIter[i2];
+
+  if( p1->pFile==0 ){
+    iRes = i2;
+  }else if( p2->pFile==0 ){
+    iRes = i1;
+  }else{
+    int res;
+    assert( pCsr->pSorter->pUnpacked!=0 );  /* allocated in vdbeSorterMerge() */
+    vdbeSorterCompare(
+        pCsr, 0, p1->aKey, p1->nKey, p2->aKey, p2->nKey, &res
+    );
+    if( res<=0 ){
+      iRes = i1;
+    }else{
+      iRes = i2;
+    }
+  }
+
+  pSorter->aTree[iOut] = iRes;
+  return SQLITE_OK;
+}
+
+/*
+** Initialize the temporary index cursor just opened as a sorter cursor.
+*/
+int sqlite3VdbeSorterInit(sqlite3 *db, VdbeCursor *pCsr){
+  int pgsz;                       /* Page size of main database */
+  int mxCache;                    /* Cache size */
+  VdbeSorter *pSorter;            /* The new sorter */
+  char *d;                        /* Dummy */
+
+  assert( pCsr->pKeyInfo && pCsr->pBt==0 );
+  pCsr->pSorter = pSorter = sqlite3DbMallocZero(db, sizeof(VdbeSorter));
+  if( pSorter==0 ){
+    return SQLITE_NOMEM;
+  }
+  
+  pSorter->pUnpacked = sqlite3VdbeAllocUnpackedRecord(pCsr->pKeyInfo, 0, 0, &d);
+  if( pSorter->pUnpacked==0 ) return SQLITE_NOMEM;
+  assert( pSorter->pUnpacked==(UnpackedRecord *)d );
+
+  if( !sqlite3TempInMemory(db) ){
+    pgsz = sqlite3BtreeGetPageSize(db->aDb[0].pBt);
+    pSorter->mnPmaSize = SORTER_MIN_WORKING * pgsz;
+    mxCache = db->aDb[0].pSchema->cache_size;
+    if( mxCache<SORTER_MIN_WORKING ) mxCache = SORTER_MIN_WORKING;
+    pSorter->mxPmaSize = mxCache * pgsz;
+  }
+
+  return SQLITE_OK;
+}
+
+/*
+** Free the list of sorted records starting at pRecord.
+*/
+static void vdbeSorterRecordFree(sqlite3 *db, SorterRecord *pRecord){
+  SorterRecord *p;
+  SorterRecord *pNext;
+  for(p=pRecord; p; p=pNext){
+    pNext = p->pNext;
+    sqlite3DbFree(db, p);
+  }
+}
+
+/*
+** Free any cursor components allocated by sqlite3VdbeSorterXXX routines.
+*/
+void sqlite3VdbeSorterClose(sqlite3 *db, VdbeCursor *pCsr){
+  VdbeSorter *pSorter = pCsr->pSorter;
+  if( pSorter ){
+    if( pSorter->aIter ){
+      int i;
+      for(i=0; i<pSorter->nTree; i++){
+        vdbeSorterIterZero(db, &pSorter->aIter[i]);
+      }
+      sqlite3DbFree(db, pSorter->aIter);
+    }
+    if( pSorter->pTemp1 ){
+      sqlite3OsCloseFree(pSorter->pTemp1);
+    }
+    vdbeSorterRecordFree(db, pSorter->pRecord);
+    sqlite3DbFree(db, pSorter->pUnpacked);
+    sqlite3DbFree(db, pSorter);
+    pCsr->pSorter = 0;
+  }
+}
+
+/*
+** Allocate space for a file-handle and open a temporary file. If successful,
+** set *ppFile to point to the malloc'd file-handle and return SQLITE_OK.
+** Otherwise, set *ppFile to 0 and return an SQLite error code.
+*/
+static int vdbeSorterOpenTempFile(sqlite3 *db, sqlite3_file **ppFile){
+  int dummy;
+  return sqlite3OsOpenMalloc(db->pVfs, 0, ppFile,
+      SQLITE_OPEN_TEMP_JOURNAL |
+      SQLITE_OPEN_READWRITE    | SQLITE_OPEN_CREATE |
+      SQLITE_OPEN_EXCLUSIVE    | SQLITE_OPEN_DELETEONCLOSE, &dummy
+  );
+}
+
+/*
+** Merge the two sorted lists p1 and p2 into a single list.
+** Set *ppOut to the head of the new list.
+*/
+static void vdbeSorterMerge(
+  VdbeCursor *pCsr,               /* For pKeyInfo */
+  SorterRecord *p1,               /* First list to merge */
+  SorterRecord *p2,               /* Second list to merge */
+  SorterRecord **ppOut            /* OUT: Head of merged list */
+){
+  SorterRecord *pFinal = 0;
+  SorterRecord **pp = &pFinal;
+  void *pVal2 = p2 ? p2->pVal : 0;
+
+  while( p1 && p2 ){
+    int res;
+    vdbeSorterCompare(pCsr, 0, p1->pVal, p1->nVal, pVal2, p2->nVal, &res);
+    if( res<=0 ){
+      *pp = p1;
+      pp = &p1->pNext;
+      p1 = p1->pNext;
+      pVal2 = 0;
+    }else{
+      *pp = p2;
+       pp = &p2->pNext;
+      p2 = p2->pNext;
+      if( p2==0 ) break;
+      pVal2 = p2->pVal;
+    }
+  }
+  *pp = p1 ? p1 : p2;
+  *ppOut = pFinal;
+}
+
+/*
+** Sort the linked list of records headed at pCsr->pRecord. Return SQLITE_OK
+** if successful, or an SQLite error code (i.e. SQLITE_NOMEM) if an error
+** occurs.
+*/
+static int vdbeSorterSort(VdbeCursor *pCsr){
+  int i;
+  SorterRecord **aSlot;
+  SorterRecord *p;
+  VdbeSorter *pSorter = pCsr->pSorter;
+
+  aSlot = (SorterRecord **)sqlite3MallocZero(64 * sizeof(SorterRecord *));
+  if( !aSlot ){
+    return SQLITE_NOMEM;
+  }
+
+  p = pSorter->pRecord;
+  while( p ){
+    SorterRecord *pNext = p->pNext;
+    p->pNext = 0;
+    for(i=0; aSlot[i]; i++){
+      vdbeSorterMerge(pCsr, p, aSlot[i], &p);
+      aSlot[i] = 0;
+    }
+    aSlot[i] = p;
+    p = pNext;
+  }
+
+  p = 0;
+  for(i=0; i<64; i++){
+    vdbeSorterMerge(pCsr, p, aSlot[i], &p);
+  }
+  pSorter->pRecord = p;
+
+  sqlite3_free(aSlot);
+  return SQLITE_OK;
+}
+
+
+/*
+** Write the current contents of the in-memory linked-list to a PMA. Return
+** SQLITE_OK if successful, or an SQLite error code otherwise.
+**
+** The format of a PMA is:
+**
+**     * A varint. This varint contains the total number of bytes of content
+**       in the PMA (not including the varint itself).
+**
+**     * One or more records packed end-to-end in order of ascending keys. 
+**       Each record consists of a varint followed by a blob of data (the 
+**       key). The varint is the number of bytes in the blob of data.
+*/
+static int vdbeSorterListToPMA(sqlite3 *db, VdbeCursor *pCsr){
+  int rc = SQLITE_OK;             /* Return code */
+  VdbeSorter *pSorter = pCsr->pSorter;
+
+  if( pSorter->nInMemory==0 ){
+    assert( pSorter->pRecord==0 );
+    return rc;
+  }
+
+  rc = vdbeSorterSort(pCsr);
+
+  /* If the first temporary PMA file has not been opened, open it now. */
+  if( rc==SQLITE_OK && pSorter->pTemp1==0 ){
+    rc = vdbeSorterOpenTempFile(db, &pSorter->pTemp1);
+    assert( rc!=SQLITE_OK || pSorter->pTemp1 );
+    assert( pSorter->iWriteOff==0 );
+    assert( pSorter->nPMA==0 );
+  }
+
+  if( rc==SQLITE_OK ){
+    i64 iOff = pSorter->iWriteOff;
+    SorterRecord *p;
+    SorterRecord *pNext = 0;
+    static const char eightZeros[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
+
+    pSorter->nPMA++;
+    rc = vdbeSorterWriteVarint(pSorter->pTemp1, pSorter->nInMemory, &iOff);
+    for(p=pSorter->pRecord; rc==SQLITE_OK && p; p=pNext){
+      pNext = p->pNext;
+      rc = vdbeSorterWriteVarint(pSorter->pTemp1, p->nVal, &iOff);
+
+      if( rc==SQLITE_OK ){
+        rc = sqlite3OsWrite(pSorter->pTemp1, p->pVal, p->nVal, iOff);
+        iOff += p->nVal;
+      }
+
+      sqlite3DbFree(db, p);
+    }
+
+    /* This assert verifies that unless an error has occurred, the size of 
+    ** the PMA on disk is the same as the expected size stored in
+    ** pSorter->nInMemory. */ 
+    assert( rc!=SQLITE_OK || pSorter->nInMemory==(
+          iOff-pSorter->iWriteOff-sqlite3VarintLen(pSorter->nInMemory)
+    ));
+
+    pSorter->iWriteOff = iOff;
+    if( rc==SQLITE_OK ){
+      /* Terminate each file with 8 extra bytes so that from any offset
+      ** in the file we can always read 9 bytes without a SHORT_READ error */
+      rc = sqlite3OsWrite(pSorter->pTemp1, eightZeros, 8, iOff);
+    }
+    pSorter->pRecord = p;
+  }
+
+  return rc;
+}
+
+/*
+** Add a record to the sorter.
+*/
+int sqlite3VdbeSorterWrite(
+  sqlite3 *db,                    /* Database handle */
+  VdbeCursor *pCsr,               /* Sorter cursor */
+  Mem *pVal                       /* Memory cell containing record */
+){
+  VdbeSorter *pSorter = pCsr->pSorter;
+  int rc = SQLITE_OK;             /* Return Code */
+  SorterRecord *pNew;             /* New list element */
+
+  assert( pSorter );
+  pSorter->nInMemory += sqlite3VarintLen(pVal->n) + pVal->n;
+
+  pNew = (SorterRecord *)sqlite3DbMallocRaw(db, pVal->n + sizeof(SorterRecord));
+  if( pNew==0 ){
+    rc = SQLITE_NOMEM;
+  }else{
+    pNew->pVal = (void *)&pNew[1];
+    memcpy(pNew->pVal, pVal->z, pVal->n);
+    pNew->nVal = pVal->n;
+    pNew->pNext = pSorter->pRecord;
+    pSorter->pRecord = pNew;
+  }
+
+  /* See if the contents of the sorter should now be written out. They
+  ** are written out when either of the following are true:
+  **
+  **   * The total memory allocated for the in-memory list is greater 
+  **     than (page-size * cache-size), or
+  **
+  **   * The total memory allocated for the in-memory list is greater 
+  **     than (page-size * 10) and sqlite3HeapNearlyFull() returns true.
+  */
+  if( rc==SQLITE_OK && pSorter->mxPmaSize>0 && (
+        (pSorter->nInMemory>pSorter->mxPmaSize)
+     || (pSorter->nInMemory>pSorter->mnPmaSize && sqlite3HeapNearlyFull())
+  )){
+    rc = vdbeSorterListToPMA(db, pCsr);
+    pSorter->nInMemory = 0;
+  }
+
+  return rc;
+}
+
+/*
+** Helper function for sqlite3VdbeSorterRewind(). 
+*/
+static int vdbeSorterInitMerge(
+  sqlite3 *db,                    /* Database handle */
+  VdbeCursor *pCsr,               /* Cursor handle for this sorter */
+  i64 *pnByte                     /* Sum of bytes in all opened PMAs */
+){
+  VdbeSorter *pSorter = pCsr->pSorter;
+  int rc = SQLITE_OK;             /* Return code */
+  int i;                          /* Used to iterator through aIter[] */
+  i64 nByte = 0;                  /* Total bytes in all opened PMAs */
+
+  /* Initialize the iterators. */
+  for(i=0; i<SORTER_MAX_MERGE_COUNT; i++){
+    VdbeSorterIter *pIter = &pSorter->aIter[i];
+    rc = vdbeSorterIterInit(db, pSorter, pSorter->iReadOff, pIter, &nByte);
+    pSorter->iReadOff = pIter->iEof;
+    assert( rc!=SQLITE_OK || pSorter->iReadOff<=pSorter->iWriteOff );
+    if( rc!=SQLITE_OK || pSorter->iReadOff>=pSorter->iWriteOff ) break;
+  }
+
+  /* Initialize the aTree[] array. */
+  for(i=pSorter->nTree-1; rc==SQLITE_OK && i>0; i--){
+    rc = vdbeSorterDoCompare(pCsr, i);
+  }
+
+  *pnByte = nByte;
+  return rc;
+}
+
+/*
+** Once the sorter has been populated, this function is called to prepare
+** for iterating through its contents in sorted order.
+*/
+int sqlite3VdbeSorterRewind(sqlite3 *db, VdbeCursor *pCsr, int *pbEof){
+  VdbeSorter *pSorter = pCsr->pSorter;
+  int rc;                         /* Return code */
+  sqlite3_file *pTemp2 = 0;       /* Second temp file to use */
+  i64 iWrite2 = 0;                /* Write offset for pTemp2 */
+  int nIter;                      /* Number of iterators used */
+  int nByte;                      /* Bytes of space required for aIter/aTree */
+  int N = 2;                      /* Power of 2 >= nIter */
+
+  assert( pSorter );
+
+  /* If no data has been written to disk, then do not do so now. Instead,
+  ** sort the VdbeSorter.pRecord list. The vdbe layer will read data directly
+  ** from the in-memory list.  */
+  if( pSorter->nPMA==0 ){
+    *pbEof = !pSorter->pRecord;
+    assert( pSorter->aTree==0 );
+    return vdbeSorterSort(pCsr);
+  }
+
+  /* Write the current b-tree to a PMA. Close the b-tree cursor. */
+  rc = vdbeSorterListToPMA(db, pCsr);
+  if( rc!=SQLITE_OK ) return rc;
+
+  /* Allocate space for aIter[] and aTree[]. */
+  nIter = pSorter->nPMA;
+  if( nIter>SORTER_MAX_MERGE_COUNT ) nIter = SORTER_MAX_MERGE_COUNT;
+  assert( nIter>0 );
+  while( N<nIter ) N += N;
+  nByte = N * (sizeof(int) + sizeof(VdbeSorterIter));
+  pSorter->aIter = (VdbeSorterIter *)sqlite3DbMallocZero(db, nByte);
+  if( !pSorter->aIter ) return SQLITE_NOMEM;
+  pSorter->aTree = (int *)&pSorter->aIter[N];
+  pSorter->nTree = N;
+
+  do {
+    int iNew;                     /* Index of new, merged, PMA */
+
+    for(iNew=0; 
+        rc==SQLITE_OK && iNew*SORTER_MAX_MERGE_COUNT<pSorter->nPMA; 
+        iNew++
+    ){
+      i64 nWrite;                 /* Number of bytes in new PMA */
+
+      /* If there are SORTER_MAX_MERGE_COUNT or less PMAs in file pTemp1,
+      ** initialize an iterator for each of them and break out of the loop.
+      ** These iterators will be incrementally merged as the VDBE layer calls
+      ** sqlite3VdbeSorterNext().
+      **
+      ** Otherwise, if pTemp1 contains more than SORTER_MAX_MERGE_COUNT PMAs,
+      ** initialize interators for SORTER_MAX_MERGE_COUNT of them. These PMAs
+      ** are merged into a single PMA that is written to file pTemp2.
+      */
+      rc = vdbeSorterInitMerge(db, pCsr, &nWrite);
+      assert( rc!=SQLITE_OK || pSorter->aIter[ pSorter->aTree[1] ].pFile );
+      if( rc!=SQLITE_OK || pSorter->nPMA<=SORTER_MAX_MERGE_COUNT ){
+        break;
+      }
+
+      /* Open the second temp file, if it is not already open. */
+      if( pTemp2==0 ){
+        assert( iWrite2==0 );
+        rc = vdbeSorterOpenTempFile(db, &pTemp2);
+      }
+
+      if( rc==SQLITE_OK ){
+        rc = vdbeSorterWriteVarint(pTemp2, nWrite, &iWrite2);
+      }
+
+      if( rc==SQLITE_OK ){
+        int bEof = 0;
+        while( rc==SQLITE_OK && bEof==0 ){
+          int nToWrite;
+          VdbeSorterIter *pIter = &pSorter->aIter[ pSorter->aTree[1] ];
+          assert( pIter->pFile );
+          nToWrite = pIter->nKey + sqlite3VarintLen(pIter->nKey);
+          rc = sqlite3OsWrite(pTemp2, pIter->aAlloc, nToWrite, iWrite2);
+          iWrite2 += nToWrite;
+          if( rc==SQLITE_OK ){
+            rc = sqlite3VdbeSorterNext(db, pCsr, &bEof);
+          }
+        }
+      }
+    }
+
+    if( pSorter->nPMA<=SORTER_MAX_MERGE_COUNT ){
+      break;
+    }else{
+      sqlite3_file *pTmp = pSorter->pTemp1;
+      pSorter->nPMA = iNew;
+      pSorter->pTemp1 = pTemp2;
+      pTemp2 = pTmp;
+      pSorter->iWriteOff = iWrite2;
+      pSorter->iReadOff = 0;
+      iWrite2 = 0;
+    }
+  }while( rc==SQLITE_OK );
+
+  if( pTemp2 ){
+    sqlite3OsCloseFree(pTemp2);
+  }
+  *pbEof = (pSorter->aIter[pSorter->aTree[1]].pFile==0);
+  return rc;
+}
+
+/*
+** Advance to the next element in the sorter.
+*/
+int sqlite3VdbeSorterNext(sqlite3 *db, VdbeCursor *pCsr, int *pbEof){
+  VdbeSorter *pSorter = pCsr->pSorter;
+  int rc;                         /* Return code */
+
+  if( pSorter->aTree ){
+    int iPrev = pSorter->aTree[1];/* Index of iterator to advance */
+    int i;                        /* Index of aTree[] to recalculate */
+
+    rc = vdbeSorterIterNext(db, &pSorter->aIter[iPrev]);
+    for(i=(pSorter->nTree+iPrev)/2; rc==SQLITE_OK && i>0; i=i/2){
+      rc = vdbeSorterDoCompare(pCsr, i);
+    }
+
+    *pbEof = (pSorter->aIter[pSorter->aTree[1]].pFile==0);
+  }else{
+    SorterRecord *pFree = pSorter->pRecord;
+    pSorter->pRecord = pFree->pNext;
+    pFree->pNext = 0;
+    vdbeSorterRecordFree(db, pFree);
+    *pbEof = !pSorter->pRecord;
+    rc = SQLITE_OK;
+  }
+  return rc;
+}
+
+/*
+** Return a pointer to a buffer owned by the sorter that contains the 
+** current key.
+*/
+static void *vdbeSorterRowkey(
+  VdbeSorter *pSorter,            /* Sorter object */
+  int *pnKey                      /* OUT: Size of current key in bytes */
+){
+  void *pKey;
+  if( pSorter->aTree ){
+    VdbeSorterIter *pIter;
+    pIter = &pSorter->aIter[ pSorter->aTree[1] ];
+    *pnKey = pIter->nKey;
+    pKey = pIter->aKey;
+  }else{
+    *pnKey = pSorter->pRecord->nVal;
+    pKey = pSorter->pRecord->pVal;
+  }
+  return pKey;
+}
+
+/*
+** Copy the current sorter key into the memory cell pOut.
+*/
+int sqlite3VdbeSorterRowkey(VdbeCursor *pCsr, Mem *pOut){
+  VdbeSorter *pSorter = pCsr->pSorter;
+  void *pKey; int nKey;           /* Sorter key to copy into pOut */
+
+  pKey = vdbeSorterRowkey(pSorter, &nKey);
+  if( sqlite3VdbeMemGrow(pOut, nKey, 0) ){
+    return SQLITE_NOMEM;
+  }
+  pOut->n = nKey;
+  MemSetTypeFlag(pOut, MEM_Blob);
+  memcpy(pOut->z, pKey, nKey);
+
+  return SQLITE_OK;
+}
+
+/*
+** Compare the key in memory cell pVal with the key that the sorter cursor
+** passed as the first argument currently points to. For the purposes of
+** the comparison, ignore the rowid field at the end of each record.
+**
+** If an error occurs, return an SQLite error code (i.e. SQLITE_NOMEM).
+** Otherwise, set *pRes to a negative, zero or positive value if the
+** key in pVal is smaller than, equal to or larger than the current sorter
+** key.
+*/
+int sqlite3VdbeSorterCompare(
+  VdbeCursor *pCsr,               /* Sorter cursor */
+  Mem *pVal,                      /* Value to compare to current sorter key */
+  int *pRes                       /* OUT: Result of comparison */
+){
+  VdbeSorter *pSorter = pCsr->pSorter;
+  void *pKey; int nKey;           /* Sorter key to compare pVal with */
+
+  pKey = vdbeSorterRowkey(pSorter, &nKey);
+  vdbeSorterCompare(pCsr, 1, pVal->z, pVal->n, pKey, nKey, pRes);
+  return SQLITE_OK;
+}
+
+#endif /* #ifndef SQLITE_OMIT_MERGE_SORT */
diff --git a/src/vtab.c b/src/vtab.c
index 223ef4e7..8119cb55 100644
--- a/src/vtab.c
+++ b/src/vtab.c
@@ -891,7 +891,7 @@ int sqlite3VtabSavepoint(sqlite3 *db, int op, int iSavepoint){
     for(i=0; rc==SQLITE_OK && i<db->nVTrans; i++){
       VTable *pVTab = db->aVTrans[i];
       const sqlite3_module *pMod = pVTab->pMod->pModule;
-      if( pMod->iVersion>=2 ){
+      if( pVTab->pVtab && pMod->iVersion>=2 ){
         int (*xMethod)(sqlite3_vtab *, int);
         switch( op ){
           case SAVEPOINT_BEGIN:
@@ -906,7 +906,7 @@ int sqlite3VtabSavepoint(sqlite3 *db, int op, int iSavepoint){
             break;
         }
         if( xMethod && pVTab->iSavepoint>iSavepoint ){
-          rc = xMethod(db->aVTrans[i]->pVtab, iSavepoint);
+          rc = xMethod(pVTab->pVtab, iSavepoint);
         }
       }
     }
diff --git a/src/wal.c b/src/wal.c
index b9a03dff..f2b31871 100644
--- a/src/wal.c
+++ b/src/wal.c
@@ -1804,13 +1804,15 @@ int sqlite3WalClose(
     */
     rc = sqlite3OsLock(pWal->pDbFd, SQLITE_LOCK_EXCLUSIVE);
     if( rc==SQLITE_OK ){
+      int bPersistWal = -1;
       if( pWal->exclusiveMode==WAL_NORMAL_MODE ){
         pWal->exclusiveMode = WAL_EXCLUSIVE_MODE;
       }
       rc = sqlite3WalCheckpoint(
           pWal, SQLITE_CHECKPOINT_PASSIVE, 0, 0, sync_flags, nBuf, zBuf, 0, 0
       );
-      if( rc==SQLITE_OK ){
+      sqlite3OsFileControl(pWal->pDbFd, SQLITE_FCNTL_PERSIST_WAL, &bPersistWal);
+      if( rc==SQLITE_OK && bPersistWal!=1 ){
         isDelete = 1;
       }
     }
@@ -2341,7 +2343,7 @@ int sqlite3WalRead(
     int sz;
     i64 iOffset;
     sz = pWal->hdr.szPage;
-    sz = (pWal->hdr.szPage&0xfe00) + ((pWal->hdr.szPage&0x0001)<<16);
+    sz = (sz&0xfe00) + ((sz&0x0001)<<16);
     testcase( sz<=32768 );
     testcase( sz>=65536 );
     iOffset = walFrameOffset(iRead, sz) + WAL_FRAME_HDRSIZE;
diff --git a/src/where.c b/src/where.c
index cf30d94d..05414da5 100644
--- a/src/where.c
+++ b/src/where.c
@@ -118,21 +118,31 @@ struct WhereTerm {
 #define TERM_ORINFO     0x10   /* Need to free the WhereTerm.u.pOrInfo object */
 #define TERM_ANDINFO    0x20   /* Need to free the WhereTerm.u.pAndInfo obj */
 #define TERM_OR_OK      0x40   /* Used during OR-clause processing */
-#ifdef SQLITE_ENABLE_STAT2
+#ifdef SQLITE_ENABLE_STAT3
 #  define TERM_VNULL    0x80   /* Manufactured x>NULL or x<=NULL term */
 #else
-#  define TERM_VNULL    0x00   /* Disabled if not using stat2 */
+#  define TERM_VNULL    0x00   /* Disabled if not using stat3 */
 #endif
 
 /*
 ** An instance of the following structure holds all information about a
 ** WHERE clause.  Mostly this is a container for one or more WhereTerms.
+**
+** Explanation of pOuter:  For a WHERE clause of the form
+**
+**           a AND ((b AND c) OR (d AND e)) AND f
+**
+** There are separate WhereClause objects for the whole clause and for
+** the subclauses "(b AND c)" and "(d AND e)".  The pOuter field of the
+** subclauses points to the WhereClause object for the whole clause.
 */
 struct WhereClause {
   Parse *pParse;           /* The parser context */
   WhereMaskSet *pMaskSet;  /* Mapping of table cursor numbers to bitmasks */
   Bitmask vmask;           /* Bitmask identifying virtual table cursors */
+  WhereClause *pOuter;     /* Outer conjunction */
   u8 op;                   /* Split operator.  TK_AND or TK_OR */
+  u16 wctrlFlags;          /* Might include WHERE_AND_ONLY */
   int nTerm;               /* Number of terms */
   int nSlot;               /* Number of entries in a[] */
   WhereTerm *a;            /* Each a[] describes a term of the WHERE cluase */
@@ -253,6 +263,7 @@ struct WhereCost {
 #define WHERE_VIRTUALTABLE 0x08000000  /* Use virtual-table processing */
 #define WHERE_MULTI_OR     0x10000000  /* OR using multiple indices */
 #define WHERE_TEMP_INDEX   0x20000000  /* Uses an ephemeral index */
+#define WHERE_DISTINCT     0x40000000  /* Correct order for DISTINCT */
 
 /*
 ** Initialize a preallocated WhereClause structure.
@@ -260,14 +271,17 @@ struct WhereCost {
 static void whereClauseInit(
   WhereClause *pWC,        /* The WhereClause to be initialized */
   Parse *pParse,           /* The parsing context */
-  WhereMaskSet *pMaskSet   /* Mapping from table cursor numbers to bitmasks */
+  WhereMaskSet *pMaskSet,  /* Mapping from table cursor numbers to bitmasks */
+  u16 wctrlFlags           /* Might include WHERE_AND_ONLY */
 ){
   pWC->pParse = pParse;
   pWC->pMaskSet = pMaskSet;
+  pWC->pOuter = 0;
   pWC->nTerm = 0;
   pWC->nSlot = ArraySize(pWC->aStatic);
   pWC->a = pWC->aStatic;
   pWC->vmask = 0;
+  pWC->wctrlFlags = wctrlFlags;
 }
 
 /* Forward reference */
@@ -466,11 +480,19 @@ static Bitmask exprListTableUsage(WhereMaskSet *pMaskSet, ExprList *pList){
 static Bitmask exprSelectTableUsage(WhereMaskSet *pMaskSet, Select *pS){
   Bitmask mask = 0;
   while( pS ){
+    SrcList *pSrc = pS->pSrc;
     mask |= exprListTableUsage(pMaskSet, pS->pEList);
     mask |= exprListTableUsage(pMaskSet, pS->pGroupBy);
     mask |= exprListTableUsage(pMaskSet, pS->pOrderBy);
     mask |= exprTableUsage(pMaskSet, pS->pWhere);
     mask |= exprTableUsage(pMaskSet, pS->pHaving);
+    if( ALWAYS(pSrc!=0) ){
+      int i;
+      for(i=0; i<pSrc->nSrc; i++){
+        mask |= exprSelectTableUsage(pMaskSet, pSrc->a[i].pSelect);
+        mask |= exprTableUsage(pMaskSet, pSrc->a[i].pOn);
+      }
+    }
     pS = pS->pPrior;
   }
   return mask;
@@ -575,36 +597,38 @@ static WhereTerm *findTerm(
   int k;
   assert( iCur>=0 );
   op &= WO_ALL;
-  for(pTerm=pWC->a, k=pWC->nTerm; k; k--, pTerm++){
-    if( pTerm->leftCursor==iCur
-       && (pTerm->prereqRight & notReady)==0
-       && pTerm->u.leftColumn==iColumn
-       && (pTerm->eOperator & op)!=0
-    ){
-      if( pIdx && pTerm->eOperator!=WO_ISNULL ){
-        Expr *pX = pTerm->pExpr;
-        CollSeq *pColl;
-        char idxaff;
-        int j;
-        Parse *pParse = pWC->pParse;
-
-        idxaff = pIdx->pTable->aCol[iColumn].affinity;
-        if( !sqlite3IndexAffinityOk(pX, idxaff) ) continue;
-
-        /* Figure out the collation sequence required from an index for
-        ** it to be useful for optimising expression pX. Store this
-        ** value in variable pColl.
-        */
-        assert(pX->pLeft);
-        pColl = sqlite3BinaryCompareCollSeq(pParse, pX->pLeft, pX->pRight);
-        assert(pColl || pParse->nErr);
-
-        for(j=0; pIdx->aiColumn[j]!=iColumn; j++){
-          if( NEVER(j>=pIdx->nColumn) ) return 0;
+  for(; pWC; pWC=pWC->pOuter){
+    for(pTerm=pWC->a, k=pWC->nTerm; k; k--, pTerm++){
+      if( pTerm->leftCursor==iCur
+         && (pTerm->prereqRight & notReady)==0
+         && pTerm->u.leftColumn==iColumn
+         && (pTerm->eOperator & op)!=0
+      ){
+        if( pIdx && pTerm->eOperator!=WO_ISNULL ){
+          Expr *pX = pTerm->pExpr;
+          CollSeq *pColl;
+          char idxaff;
+          int j;
+          Parse *pParse = pWC->pParse;
+  
+          idxaff = pIdx->pTable->aCol[iColumn].affinity;
+          if( !sqlite3IndexAffinityOk(pX, idxaff) ) continue;
+  
+          /* Figure out the collation sequence required from an index for
+          ** it to be useful for optimising expression pX. Store this
+          ** value in variable pColl.
+          */
+          assert(pX->pLeft);
+          pColl = sqlite3BinaryCompareCollSeq(pParse, pX->pLeft, pX->pRight);
+          assert(pColl || pParse->nErr);
+  
+          for(j=0; pIdx->aiColumn[j]!=iColumn; j++){
+            if( NEVER(j>=pIdx->nColumn) ) return 0;
+          }
+          if( pColl && sqlite3StrICmp(pColl->zName, pIdx->azColl[j]) ) continue;
         }
-        if( pColl && sqlite3StrICmp(pColl->zName, pIdx->azColl[j]) ) continue;
+        return pTerm;
       }
-      return pTerm;
     }
   }
   return 0;
@@ -681,7 +705,7 @@ static int isLikeOrGlob(
     if( pVal && sqlite3_value_type(pVal)==SQLITE_TEXT ){
       z = (char *)sqlite3_value_text(pVal);
     }
-    sqlite3VdbeSetVarmask(pParse->pVdbe, iCol); /* IMP: R-23257-02778 */
+    sqlite3VdbeSetVarmask(pParse->pVdbe, iCol);
     assert( pRight->op==TK_VARIABLE || pRight->op==TK_REGISTER );
   }else if( op==TK_STRING ){
     z = pRight->u.zToken;
@@ -699,7 +723,7 @@ static int isLikeOrGlob(
       *ppPrefix = pPrefix;
       if( op==TK_VARIABLE ){
         Vdbe *v = pParse->pVdbe;
-        sqlite3VdbeSetVarmask(v, pRight->iColumn); /* IMP: R-23257-02778 */
+        sqlite3VdbeSetVarmask(v, pRight->iColumn);
         if( *pisComplete && pRight->u.zToken[1] ){
           /* If the rhs of the LIKE expression is a variable, and the current
           ** value of the variable means there is no need to invoke the LIKE
@@ -868,7 +892,7 @@ static void exprAnalyzeOrTerm(
   if( pOrInfo==0 ) return;
   pTerm->wtFlags |= TERM_ORINFO;
   pOrWc = &pOrInfo->wc;
-  whereClauseInit(pOrWc, pWC->pParse, pMaskSet);
+  whereClauseInit(pOrWc, pWC->pParse, pMaskSet, pWC->wctrlFlags);
   whereSplit(pOrWc, pExpr, TK_OR);
   exprAnalyzeAll(pSrc, pOrWc);
   if( db->mallocFailed ) return;
@@ -895,9 +919,10 @@ static void exprAnalyzeOrTerm(
         pOrTerm->wtFlags |= TERM_ANDINFO;
         pOrTerm->eOperator = WO_AND;
         pAndWC = &pAndInfo->wc;
-        whereClauseInit(pAndWC, pWC->pParse, pMaskSet);
+        whereClauseInit(pAndWC, pWC->pParse, pMaskSet, pWC->wctrlFlags);
         whereSplit(pAndWC, pOrTerm->pExpr, TK_AND);
         exprAnalyzeAll(pSrc, pAndWC);
+        pAndWC->pOuter = pWC;
         testcase( db->mallocFailed );
         if( !db->mallocFailed ){
           for(j=0, pAndTerm=pAndWC->a; j<pAndWC->nTerm; j++, pAndTerm++){
@@ -1331,8 +1356,8 @@ static void exprAnalyze(
   }
 #endif /* SQLITE_OMIT_VIRTUALTABLE */
 
-#ifdef SQLITE_ENABLE_STAT2
-  /* When sqlite_stat2 histogram data is available an operator of the
+#ifdef SQLITE_ENABLE_STAT3
+  /* When sqlite_stat3 histogram data is available an operator of the
   ** form "x IS NOT NULL" can sometimes be evaluated more efficiently
   ** as "x>NULL" if x is not an INTEGER PRIMARY KEY.  So construct a
   ** virtual term of that form.
@@ -1370,7 +1395,7 @@ static void exprAnalyze(
       pNewTerm->prereqAll = pTerm->prereqAll;
     }
   }
-#endif /* SQLITE_ENABLE_STAT2 */
+#endif /* SQLITE_ENABLE_STAT */
 
   /* Prevent ON clause terms of a LEFT JOIN from being used to drive
   ** an index for tables to the left of the join.
@@ -1397,6 +1422,162 @@ static int referencesOtherTables(
   return 0;
 }
 
+/*
+** This function searches the expression list passed as the second argument
+** for an expression of type TK_COLUMN that refers to the same column and
+** uses the same collation sequence as the iCol'th column of index pIdx.
+** Argument iBase is the cursor number used for the table that pIdx refers
+** to.
+**
+** If such an expression is found, its index in pList->a[] is returned. If
+** no expression is found, -1 is returned.
+*/
+static int findIndexCol(
+  Parse *pParse,                  /* Parse context */
+  ExprList *pList,                /* Expression list to search */
+  int iBase,                      /* Cursor for table associated with pIdx */
+  Index *pIdx,                    /* Index to match column of */
+  int iCol                        /* Column of index to match */
+){
+  int i;
+  const char *zColl = pIdx->azColl[iCol];
+
+  for(i=0; i<pList->nExpr; i++){
+    Expr *p = pList->a[i].pExpr;
+    if( p->op==TK_COLUMN
+     && p->iColumn==pIdx->aiColumn[iCol]
+     && p->iTable==iBase
+    ){
+      CollSeq *pColl = sqlite3ExprCollSeq(pParse, p);
+      if( ALWAYS(pColl) && 0==sqlite3StrICmp(pColl->zName, zColl) ){
+        return i;
+      }
+    }
+  }
+
+  return -1;
+}
+
+/*
+** This routine determines if pIdx can be used to assist in processing a
+** DISTINCT qualifier. In other words, it tests whether or not using this
+** index for the outer loop guarantees that rows with equal values for
+** all expressions in the pDistinct list are delivered grouped together.
+**
+** For example, the query 
+**
+**   SELECT DISTINCT a, b, c FROM tbl WHERE a = ?
+**
+** can benefit from any index on columns "b" and "c".
+*/
+static int isDistinctIndex(
+  Parse *pParse,                  /* Parsing context */
+  WhereClause *pWC,               /* The WHERE clause */
+  Index *pIdx,                    /* The index being considered */
+  int base,                       /* Cursor number for the table pIdx is on */
+  ExprList *pDistinct,            /* The DISTINCT expressions */
+  int nEqCol                      /* Number of index columns with == */
+){
+  Bitmask mask = 0;               /* Mask of unaccounted for pDistinct exprs */
+  int i;                          /* Iterator variable */
+
+  if( pIdx->zName==0 || pDistinct==0 || pDistinct->nExpr>=BMS ) return 0;
+  testcase( pDistinct->nExpr==BMS-1 );
+
+  /* Loop through all the expressions in the distinct list. If any of them
+  ** are not simple column references, return early. Otherwise, test if the
+  ** WHERE clause contains a "col=X" clause. If it does, the expression
+  ** can be ignored. If it does not, and the column does not belong to the
+  ** same table as index pIdx, return early. Finally, if there is no
+  ** matching "col=X" expression and the column is on the same table as pIdx,
+  ** set the corresponding bit in variable mask.
+  */
+  for(i=0; i<pDistinct->nExpr; i++){
+    WhereTerm *pTerm;
+    Expr *p = pDistinct->a[i].pExpr;
+    if( p->op!=TK_COLUMN ) return 0;
+    pTerm = findTerm(pWC, p->iTable, p->iColumn, ~(Bitmask)0, WO_EQ, 0);
+    if( pTerm ){
+      Expr *pX = pTerm->pExpr;
+      CollSeq *p1 = sqlite3BinaryCompareCollSeq(pParse, pX->pLeft, pX->pRight);
+      CollSeq *p2 = sqlite3ExprCollSeq(pParse, p);
+      if( p1==p2 ) continue;
+    }
+    if( p->iTable!=base ) return 0;
+    mask |= (((Bitmask)1) << i);
+  }
+
+  for(i=nEqCol; mask && i<pIdx->nColumn; i++){
+    int iExpr = findIndexCol(pParse, pDistinct, base, pIdx, i);
+    if( iExpr<0 ) break;
+    mask &= ~(((Bitmask)1) << iExpr);
+  }
+
+  return (mask==0);
+}
+
+
+/*
+** Return true if the DISTINCT expression-list passed as the third argument
+** is redundant. A DISTINCT list is redundant if the database contains a
+** UNIQUE index that guarantees that the result of the query will be distinct
+** anyway.
+*/
+static int isDistinctRedundant(
+  Parse *pParse,
+  SrcList *pTabList,
+  WhereClause *pWC,
+  ExprList *pDistinct
+){
+  Table *pTab;
+  Index *pIdx;
+  int i;                          
+  int iBase;
+
+  /* If there is more than one table or sub-select in the FROM clause of
+  ** this query, then it will not be possible to show that the DISTINCT 
+  ** clause is redundant. */
+  if( pTabList->nSrc!=1 ) return 0;
+  iBase = pTabList->a[0].iCursor;
+  pTab = pTabList->a[0].pTab;
+
+  /* If any of the expressions is an IPK column on table iBase, then return 
+  ** true. Note: The (p->iTable==iBase) part of this test may be false if the
+  ** current SELECT is a correlated sub-query.
+  */
+  for(i=0; i<pDistinct->nExpr; i++){
+    Expr *p = pDistinct->a[i].pExpr;
+    if( p->op==TK_COLUMN && p->iTable==iBase && p->iColumn<0 ) return 1;
+  }
+
+  /* Loop through all indices on the table, checking each to see if it makes
+  ** the DISTINCT qualifier redundant. It does so if:
+  **
+  **   1. The index is itself UNIQUE, and
+  **
+  **   2. All of the columns in the index are either part of the pDistinct
+  **      list, or else the WHERE clause contains a term of the form "col=X",
+  **      where X is a constant value. The collation sequences of the
+  **      comparison and select-list expressions must match those of the index.
+  */
+  for(pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext){
+    if( pIdx->onError==OE_None ) continue;
+    for(i=0; i<pIdx->nColumn; i++){
+      int iCol = pIdx->aiColumn[i];
+      if( 0==findTerm(pWC, iBase, iCol, ~(Bitmask)0, WO_EQ, pIdx) 
+       && 0>findIndexCol(pParse, pDistinct, iBase, pIdx, i)
+      ){
+        break;
+      }
+    }
+    if( i==pIdx->nColumn ){
+      /* This index implies that the DISTINCT qualifier is redundant. */
+      return 1;
+    }
+  }
+
+  return 0;
+}
 
 /*
 ** This routine decides if pIdx can be used to satisfy the ORDER BY
@@ -1433,7 +1614,10 @@ static int isSortingIndex(
   struct ExprList_item *pTerm;    /* A term of the ORDER BY clause */
   sqlite3 *db = pParse->db;
 
-  assert( pOrderBy!=0 );
+  if( !pOrderBy ) return 0;
+  if( wsFlags & WHERE_COLUMN_IN ) return 0;
+  if( pIdx->bUnordered ) return 0;
+
   nTerm = pOrderBy->nExpr;
   assert( nTerm>0 );
 
@@ -1633,11 +1817,14 @@ static void bestOrClauseIndex(
   WhereTerm * const pWCEnd = &pWC->a[pWC->nTerm];        /* End of pWC->a[] */
   WhereTerm *pTerm;                 /* A single term of the WHERE clause */
 
-  /* No OR-clause optimization allowed if the INDEXED BY or NOT INDEXED clauses
-  ** are used */
+  /* The OR-clause optimization is disallowed if the INDEXED BY or
+  ** NOT INDEXED clauses are used or if the WHERE_AND_ONLY bit is set. */
   if( pSrc->notIndexed || pSrc->pIndex!=0 ){
     return;
   }
+  if( pWC->wctrlFlags & WHERE_AND_ONLY ){
+    return;
+  }
 
   /* Search the WHERE clause terms for a usable WO_OR term. */
   for(pTerm=pWC->a; pTerm<pWCEnd; pTerm++){
@@ -1665,8 +1852,10 @@ static void bestOrClauseIndex(
           WhereClause tempWC;
           tempWC.pParse = pWC->pParse;
           tempWC.pMaskSet = pWC->pMaskSet;
+          tempWC.pOuter = pWC;
           tempWC.op = TK_AND;
           tempWC.a = pOrTerm;
+          tempWC.wctrlFlags = 0;
           tempWC.nTerm = 1;
           bestIndex(pParse, &tempWC, pSrc, notReady, notValid, 0, &sTermCost);
         }else{
@@ -1746,6 +1935,10 @@ static void bestAutomaticIndex(
   WhereTerm *pWCEnd;          /* End of pWC->a[] */
   Table *pTable;              /* Table tht might be indexed */
 
+  if( pParse->nQueryLoop<=(double)1 ){
+    /* There is no point in building an automatic index for a single scan */
+    return;
+  }
   if( (pParse->db->flags & SQLITE_AutoIndex)==0 ){
     /* Automatic indices are disabled at run-time */
     return;
@@ -1758,6 +1951,10 @@ static void bestAutomaticIndex(
     /* The NOT INDEXED clause appears in the SQL. */
     return;
   }
+  if( pSrc->isCorrelated ){
+    /* The source is a correlated sub-query. No point in indexing it. */
+    return;
+  }
 
   assert( pParse->nQueryLoop >= (double)1 );
   pTable = pSrc->pTab;
@@ -1826,8 +2023,7 @@ static void constructAutomaticIndex(
   v = pParse->pVdbe;
   assert( v!=0 );
   regIsInit = ++pParse->nMem;
-  addrInit = sqlite3VdbeAddOp1(v, OP_If, regIsInit);
-  sqlite3VdbeAddOp2(v, OP_Integer, 1, regIsInit);
+  addrInit = sqlite3VdbeAddOp1(v, OP_Once, regIsInit);
 
   /* Count the number of columns that will be added to the index
   ** and used to match WHERE clause constraints */
@@ -1974,6 +2170,7 @@ static sqlite3_index_info *allocateIndexInfo(
     testcase( pTerm->eOperator==WO_IN );
     testcase( pTerm->eOperator==WO_ISNULL );
     if( pTerm->eOperator & (WO_IN|WO_ISNULL) ) continue;
+    if( pTerm->wtFlags & TERM_VNULL ) continue;
     nTerm++;
   }
 
@@ -2024,6 +2221,7 @@ static sqlite3_index_info *allocateIndexInfo(
     testcase( pTerm->eOperator==WO_IN );
     testcase( pTerm->eOperator==WO_ISNULL );
     if( pTerm->eOperator & (WO_IN|WO_ISNULL) ) continue;
+    if( pTerm->wtFlags & TERM_VNULL ) continue;
     pIdxCons[j].iColumn = pTerm->u.leftColumn;
     pIdxCons[j].iTermOffset = i;
     pIdxCons[j].op = (u8)pTerm->eOperator;
@@ -2250,67 +2448,85 @@ static void bestVirtualIndex(
 }
 #endif /* SQLITE_OMIT_VIRTUALTABLE */
 
+#ifdef SQLITE_ENABLE_STAT3
 /*
-** Argument pIdx is a pointer to an index structure that has an array of
-** SQLITE_INDEX_SAMPLES evenly spaced samples of the first indexed column
-** stored in Index.aSample. These samples divide the domain of values stored
-** the index into (SQLITE_INDEX_SAMPLES+1) regions.
-** Region 0 contains all values less than the first sample value. Region
-** 1 contains values between the first and second samples.  Region 2 contains
-** values between samples 2 and 3.  And so on.  Region SQLITE_INDEX_SAMPLES
-** contains values larger than the last sample.
+** Estimate the location of a particular key among all keys in an
+** index.  Store the results in aStat as follows:
 **
-** If the index contains many duplicates of a single value, then it is
-** possible that two or more adjacent samples can hold the same value.
-** When that is the case, the smallest possible region code is returned
-** when roundUp is false and the largest possible region code is returned
-** when roundUp is true.
+**    aStat[0]      Est. number of rows less than pVal
+**    aStat[1]      Est. number of rows equal to pVal
 **
-** If successful, this function determines which of the regions value 
-** pVal lies in, sets *piRegion to the region index (a value between 0
-** and SQLITE_INDEX_SAMPLES+1, inclusive) and returns SQLITE_OK.
-** Or, if an OOM occurs while converting text values between encodings,
-** SQLITE_NOMEM is returned and *piRegion is undefined.
+** Return SQLITE_OK on success.
 */
-#ifdef SQLITE_ENABLE_STAT2
-static int whereRangeRegion(
+static int whereKeyStats(
   Parse *pParse,              /* Database connection */
   Index *pIdx,                /* Index to consider domain of */
   sqlite3_value *pVal,        /* Value to consider */
-  int roundUp,                /* Return largest valid region if true */
-  int *piRegion               /* OUT: Region of domain in which value lies */
+  int roundUp,                /* Round up if true.  Round down if false */
+  tRowcnt *aStat              /* OUT: stats written here */
 ){
-  assert( roundUp==0 || roundUp==1 );
-  if( ALWAYS(pVal) ){
-    IndexSample *aSample = pIdx->aSample;
-    int i = 0;
-    int eType = sqlite3_value_type(pVal);
+  tRowcnt n;
+  IndexSample *aSample;
+  int i, eType;
+  int isEq = 0;
+  i64 v;
+  double r, rS;
 
-    if( eType==SQLITE_INTEGER || eType==SQLITE_FLOAT ){
-      double r = sqlite3_value_double(pVal);
-      for(i=0; i<SQLITE_INDEX_SAMPLES; i++){
-        if( aSample[i].eType==SQLITE_NULL ) continue;
-        if( aSample[i].eType>=SQLITE_TEXT ) break;
-        if( roundUp ){
-          if( aSample[i].u.r>r ) break;
-        }else{
-          if( aSample[i].u.r>=r ) break;
+  assert( roundUp==0 || roundUp==1 );
+  assert( pIdx->nSample>0 );
+  if( pVal==0 ) return SQLITE_ERROR;
+  n = pIdx->aiRowEst[0];
+  aSample = pIdx->aSample;
+  eType = sqlite3_value_type(pVal);
+
+  if( eType==SQLITE_INTEGER ){
+    v = sqlite3_value_int64(pVal);
+    r = (i64)v;
+    for(i=0; i<pIdx->nSample; i++){
+      if( aSample[i].eType==SQLITE_NULL ) continue;
+      if( aSample[i].eType>=SQLITE_TEXT ) break;
+      if( aSample[i].eType==SQLITE_INTEGER ){
+        if( aSample[i].u.i>=v ){
+          isEq = aSample[i].u.i==v;
+          break;
+        }
+      }else{
+        assert( aSample[i].eType==SQLITE_FLOAT );
+        if( aSample[i].u.r>=r ){
+          isEq = aSample[i].u.r==r;
+          break;
         }
       }
-    }else if( eType==SQLITE_NULL ){
-      i = 0;
-      if( roundUp ){
-        while( i<SQLITE_INDEX_SAMPLES && aSample[i].eType==SQLITE_NULL ) i++;
+    }
+  }else if( eType==SQLITE_FLOAT ){
+    r = sqlite3_value_double(pVal);
+    for(i=0; i<pIdx->nSample; i++){
+      if( aSample[i].eType==SQLITE_NULL ) continue;
+      if( aSample[i].eType>=SQLITE_TEXT ) break;
+      if( aSample[i].eType==SQLITE_FLOAT ){
+        rS = aSample[i].u.r;
+      }else{
+        rS = aSample[i].u.i;
       }
-    }else{ 
+      if( rS>=r ){
+        isEq = rS==r;
+        break;
+      }
+    }
+  }else if( eType==SQLITE_NULL ){
+    i = 0;
+    if( aSample[0].eType==SQLITE_NULL ) isEq = 1;
+  }else{
+    assert( eType==SQLITE_TEXT || eType==SQLITE_BLOB );
+    for(i=0; i<pIdx->nSample; i++){
+      if( aSample[i].eType==SQLITE_TEXT || aSample[i].eType==SQLITE_BLOB ){
+        break;
+      }
+    }
+    if( i<pIdx->nSample ){      
       sqlite3 *db = pParse->db;
       CollSeq *pColl;
       const u8 *z;
-      int n;
-
-      /* pVal comes from sqlite3ValueFromExpr() so the type cannot be NULL */
-      assert( eType==SQLITE_TEXT || eType==SQLITE_BLOB );
-
       if( eType==SQLITE_BLOB ){
         z = (const u8 *)sqlite3_value_blob(pVal);
         pColl = db->pDfltColl;
@@ -2329,12 +2545,12 @@ static int whereRangeRegion(
         assert( z && pColl && pColl->xCmp );
       }
       n = sqlite3ValueBytes(pVal, pColl->enc);
-
-      for(i=0; i<SQLITE_INDEX_SAMPLES; i++){
+  
+      for(; i<pIdx->nSample; i++){
         int c;
         int eSampletype = aSample[i].eType;
-        if( eSampletype==SQLITE_NULL || eSampletype<eType ) continue;
-        if( (eSampletype!=eType) ) break;
+        if( eSampletype<eType ) continue;
+        if( eSampletype!=eType ) break;
 #ifndef SQLITE_OMIT_UTF16
         if( pColl->enc!=SQLITE_UTF8 ){
           int nSample;
@@ -2352,16 +2568,47 @@ static int whereRangeRegion(
         {
           c = pColl->xCmp(pColl->pUser, aSample[i].nByte, aSample[i].u.z, n, z);
         }
-        if( c-roundUp>=0 ) break;
+        if( c>=0 ){
+          if( c==0 ) isEq = 1;
+          break;
+        }
       }
     }
+  }
 
-    assert( i>=0 && i<=SQLITE_INDEX_SAMPLES );
-    *piRegion = i;
+  /* At this point, aSample[i] is the first sample that is greater than
+  ** or equal to pVal.  Or if i==pIdx->nSample, then all samples are less
+  ** than pVal.  If aSample[i]==pVal, then isEq==1.
+  */
+  if( isEq ){
+    assert( i<pIdx->nSample );
+    aStat[0] = aSample[i].nLt;
+    aStat[1] = aSample[i].nEq;
+  }else{
+    tRowcnt iLower, iUpper, iGap;
+    if( i==0 ){
+      iLower = 0;
+      iUpper = aSample[0].nLt;
+    }else{
+      iUpper = i>=pIdx->nSample ? n : aSample[i].nLt;
+      iLower = aSample[i-1].nEq + aSample[i-1].nLt;
+    }
+    aStat[1] = pIdx->avgEq;
+    if( iLower>=iUpper ){
+      iGap = 0;
+    }else{
+      iGap = iUpper - iLower;
+    }
+    if( roundUp ){
+      iGap = (iGap*2)/3;
+    }else{
+      iGap = iGap/3;
+    }
+    aStat[0] = iLower + iGap;
   }
   return SQLITE_OK;
 }
-#endif   /* #ifdef SQLITE_ENABLE_STAT2 */
+#endif /* SQLITE_ENABLE_STAT3 */
 
 /*
 ** If expression pExpr represents a literal value, set *pp to point to
@@ -2379,7 +2626,7 @@ static int whereRangeRegion(
 **
 ** If an error occurs, return an error code. Otherwise, SQLITE_OK.
 */
-#ifdef SQLITE_ENABLE_STAT2
+#ifdef SQLITE_ENABLE_STAT3
 static int valueFromExpr(
   Parse *pParse, 
   Expr *pExpr, 
@@ -2390,7 +2637,7 @@ static int valueFromExpr(
    || (pExpr->op==TK_REGISTER && pExpr->op2==TK_VARIABLE)
   ){
     int iVar = pExpr->iColumn;
-    sqlite3VdbeSetVarmask(pParse->pVdbe, iVar); /* IMP: R-23257-02778 */
+    sqlite3VdbeSetVarmask(pParse->pVdbe, iVar);
     *pp = sqlite3VdbeGetValue(pParse->pReprepare, iVar, aff);
     return SQLITE_OK;
   }
@@ -2427,17 +2674,15 @@ static int valueFromExpr(
 **
 ** then nEq should be passed 0.
 **
-** The returned value is an integer between 1 and 100, inclusive. A return
-** value of 1 indicates that the proposed range scan is expected to visit
-** approximately 1/100th (1%) of the rows selected by the nEq equality
-** constraints (if any). A return value of 100 indicates that it is expected
-** that the range scan will visit every row (100%) selected by the equality
-** constraints.
+** The returned value is an integer divisor to reduce the estimated
+** search space.  A return value of 1 means that range constraints are
+** no help at all.  A return value of 2 means range constraints are
+** expected to reduce the search space by half.  And so forth...
 **
-** In the absence of sqlite_stat2 ANALYZE data, each range inequality
-** reduces the search space by 3/4ths.  Hence a single constraint (x>?)
-** results in a return of 25 and a range constraint (x>? AND x<?) results
-** in a return of 6.
+** In the absence of sqlite_stat3 ANALYZE data, each range inequality
+** reduces the search space by a factor of 4.  Hence a single constraint (x>?)
+** results in a return of 4 and a range constraint (x>? AND x<?) results
+** in a return of 16.
 */
 static int whereRangeScanEst(
   Parse *pParse,       /* Parsing & code generating context */
@@ -2445,84 +2690,72 @@ static int whereRangeScanEst(
   int nEq,             /* index into p->aCol[] of the range-compared column */
   WhereTerm *pLower,   /* Lower bound on the range. ex: "x>123" Might be NULL */
   WhereTerm *pUpper,   /* Upper bound on the range. ex: "x<455" Might be NULL */
-  int *piEst           /* OUT: Return value */
+  double *pRangeDiv   /* OUT: Reduce search space by this divisor */
 ){
   int rc = SQLITE_OK;
 
-#ifdef SQLITE_ENABLE_STAT2
+#ifdef SQLITE_ENABLE_STAT3
 
-  if( nEq==0 && p->aSample ){
-    sqlite3_value *pLowerVal = 0;
-    sqlite3_value *pUpperVal = 0;
-    int iEst;
-    int iLower = 0;
-    int iUpper = SQLITE_INDEX_SAMPLES;
-    int roundUpUpper = 0;
-    int roundUpLower = 0;
+  if( nEq==0 && p->nSample ){
+    sqlite3_value *pRangeVal;
+    tRowcnt iLower = 0;
+    tRowcnt iUpper = p->aiRowEst[0];
+    tRowcnt a[2];
     u8 aff = p->pTable->aCol[p->aiColumn[0]].affinity;
 
     if( pLower ){
       Expr *pExpr = pLower->pExpr->pRight;
-      rc = valueFromExpr(pParse, pExpr, aff, &pLowerVal);
+      rc = valueFromExpr(pParse, pExpr, aff, &pRangeVal);
       assert( pLower->eOperator==WO_GT || pLower->eOperator==WO_GE );
-      roundUpLower = (pLower->eOperator==WO_GT) ?1:0;
+      if( rc==SQLITE_OK
+       && whereKeyStats(pParse, p, pRangeVal, 0, a)==SQLITE_OK
+      ){
+        iLower = a[0];
+        if( pLower->eOperator==WO_GT ) iLower += a[1];
+      }
+      sqlite3ValueFree(pRangeVal);
     }
     if( rc==SQLITE_OK && pUpper ){
       Expr *pExpr = pUpper->pExpr->pRight;
-      rc = valueFromExpr(pParse, pExpr, aff, &pUpperVal);
+      rc = valueFromExpr(pParse, pExpr, aff, &pRangeVal);
       assert( pUpper->eOperator==WO_LT || pUpper->eOperator==WO_LE );
-      roundUpUpper = (pUpper->eOperator==WO_LE) ?1:0;
-    }
-
-    if( rc!=SQLITE_OK || (pLowerVal==0 && pUpperVal==0) ){
-      sqlite3ValueFree(pLowerVal);
-      sqlite3ValueFree(pUpperVal);
-      goto range_est_fallback;
-    }else if( pLowerVal==0 ){
-      rc = whereRangeRegion(pParse, p, pUpperVal, roundUpUpper, &iUpper);
-      if( pLower ) iLower = iUpper/2;
-    }else if( pUpperVal==0 ){
-      rc = whereRangeRegion(pParse, p, pLowerVal, roundUpLower, &iLower);
-      if( pUpper ) iUpper = (iLower + SQLITE_INDEX_SAMPLES + 1)/2;
-    }else{
-      rc = whereRangeRegion(pParse, p, pUpperVal, roundUpUpper, &iUpper);
-      if( rc==SQLITE_OK ){
-        rc = whereRangeRegion(pParse, p, pLowerVal, roundUpLower, &iLower);
+      if( rc==SQLITE_OK
+       && whereKeyStats(pParse, p, pRangeVal, 1, a)==SQLITE_OK
+      ){
+        iUpper = a[0];
+        if( pUpper->eOperator==WO_LE ) iUpper += a[1];
       }
+      sqlite3ValueFree(pRangeVal);
     }
-    WHERETRACE(("range scan regions: %d..%d\n", iLower, iUpper));
-
-    iEst = iUpper - iLower;
-    testcase( iEst==SQLITE_INDEX_SAMPLES );
-    assert( iEst<=SQLITE_INDEX_SAMPLES );
-    if( iEst<1 ){
-      *piEst = 50/SQLITE_INDEX_SAMPLES;
-    }else{
-      *piEst = (iEst*100)/SQLITE_INDEX_SAMPLES;
+    if( rc==SQLITE_OK ){
+      if( iUpper<=iLower ){
+        *pRangeDiv = (double)p->aiRowEst[0];
+      }else{
+        *pRangeDiv = (double)p->aiRowEst[0]/(double)(iUpper - iLower);
+      }
+      WHERETRACE(("range scan regions: %u..%u  div=%g\n",
+                  (u32)iLower, (u32)iUpper, *pRangeDiv));
+      return SQLITE_OK;
     }
-    sqlite3ValueFree(pLowerVal);
-    sqlite3ValueFree(pUpperVal);
-    return rc;
   }
-range_est_fallback:
 #else
   UNUSED_PARAMETER(pParse);
   UNUSED_PARAMETER(p);
   UNUSED_PARAMETER(nEq);
 #endif
   assert( pLower || pUpper );
-  *piEst = 100;
-  if( pLower && (pLower->wtFlags & TERM_VNULL)==0 ) *piEst /= 4;
-  if( pUpper ) *piEst /= 4;
+  *pRangeDiv = (double)1;
+  if( pLower && (pLower->wtFlags & TERM_VNULL)==0 ) *pRangeDiv *= (double)4;
+  if( pUpper ) *pRangeDiv *= (double)4;
   return rc;
 }
 
-#ifdef SQLITE_ENABLE_STAT2
+#ifdef SQLITE_ENABLE_STAT3
 /*
 ** Estimate the number of rows that will be returned based on
 ** an equality constraint x=VALUE and where that VALUE occurs in
 ** the histogram data.  This only works when x is the left-most
-** column of an index and sqlite_stat2 histogram data is available
+** column of an index and sqlite_stat3 histogram data is available
 ** for that index.  When pExpr==NULL that means the constraint is
 ** "x IS NULL" instead of "x=VALUE".
 **
@@ -2542,12 +2775,12 @@ static int whereEqualScanEst(
   double *pnRow        /* Write the revised row estimate here */
 ){
   sqlite3_value *pRhs = 0;  /* VALUE on right-hand side of pTerm */
-  int iLower, iUpper;       /* Range of histogram regions containing pRhs */
   u8 aff;                   /* Column affinity */
   int rc;                   /* Subfunction return code */
-  double nRowEst;           /* New estimate of the number of rows */
+  tRowcnt a[2];             /* Statistics */
 
   assert( p->aSample!=0 );
+  assert( p->nSample>0 );
   aff = p->pTable->aCol[p->aiColumn[0]].affinity;
   if( pExpr ){
     rc = valueFromExpr(pParse, pExpr, aff, &pRhs);
@@ -2556,26 +2789,18 @@ static int whereEqualScanEst(
     pRhs = sqlite3ValueNew(pParse->db);
   }
   if( pRhs==0 ) return SQLITE_NOTFOUND;
-  rc = whereRangeRegion(pParse, p, pRhs, 0, &iLower);
-  if( rc ) goto whereEqualScanEst_cancel;
-  rc = whereRangeRegion(pParse, p, pRhs, 1, &iUpper);
-  if( rc ) goto whereEqualScanEst_cancel;
-  WHERETRACE(("equality scan regions: %d..%d\n", iLower, iUpper));
-  if( iLower>=iUpper ){
-    nRowEst = p->aiRowEst[0]/(SQLITE_INDEX_SAMPLES*2);
-    if( nRowEst<*pnRow ) *pnRow = nRowEst;
-  }else{
-    nRowEst = (iUpper-iLower)*p->aiRowEst[0]/SQLITE_INDEX_SAMPLES;
-    *pnRow = nRowEst;
+  rc = whereKeyStats(pParse, p, pRhs, 0, a);
+  if( rc==SQLITE_OK ){
+    WHERETRACE(("equality scan regions: %d\n", (int)a[1]));
+    *pnRow = a[1];
   }
-
 whereEqualScanEst_cancel:
   sqlite3ValueFree(pRhs);
   return rc;
 }
-#endif /* defined(SQLITE_ENABLE_STAT2) */
+#endif /* defined(SQLITE_ENABLE_STAT3) */
 
-#ifdef SQLITE_ENABLE_STAT2
+#ifdef SQLITE_ENABLE_STAT3
 /*
 ** Estimate the number of rows that will be returned based on
 ** an IN constraint where the right-hand side of the IN operator
@@ -2598,60 +2823,25 @@ static int whereInScanEst(
   ExprList *pList,     /* The value list on the RHS of "x IN (v1,v2,v3,...)" */
   double *pnRow        /* Write the revised row estimate here */
 ){
-  sqlite3_value *pVal = 0;  /* One value from list */
-  int iLower, iUpper;       /* Range of histogram regions containing pRhs */
-  u8 aff;                   /* Column affinity */
-  int rc = SQLITE_OK;       /* Subfunction return code */
-  double nRowEst;           /* New estimate of the number of rows */
-  int nSpan = 0;            /* Number of histogram regions spanned */
-  int nSingle = 0;          /* Histogram regions hit by a single value */
-  int nNotFound = 0;        /* Count of values that are not constants */
-  int i;                               /* Loop counter */
-  u8 aSpan[SQLITE_INDEX_SAMPLES+1];    /* Histogram regions that are spanned */
-  u8 aSingle[SQLITE_INDEX_SAMPLES+1];  /* Histogram regions hit once */
+  int rc = SQLITE_OK;         /* Subfunction return code */
+  double nEst;                /* Number of rows for a single term */
+  double nRowEst = (double)0; /* New estimate of the number of rows */
+  int i;                      /* Loop counter */
 
   assert( p->aSample!=0 );
-  aff = p->pTable->aCol[p->aiColumn[0]].affinity;
-  memset(aSpan, 0, sizeof(aSpan));
-  memset(aSingle, 0, sizeof(aSingle));
-  for(i=0; i<pList->nExpr; i++){
-    sqlite3ValueFree(pVal);
-    rc = valueFromExpr(pParse, pList->a[i].pExpr, aff, &pVal);
-    if( rc ) break;
-    if( pVal==0 || sqlite3_value_type(pVal)==SQLITE_NULL ){
-      nNotFound++;
-      continue;
-    }
-    rc = whereRangeRegion(pParse, p, pVal, 0, &iLower);
-    if( rc ) break;
-    rc = whereRangeRegion(pParse, p, pVal, 1, &iUpper);
-    if( rc ) break;
-    if( iLower>=iUpper ){
-      aSingle[iLower] = 1;
-    }else{
-      assert( iLower>=0 && iUpper<=SQLITE_INDEX_SAMPLES );
-      while( iLower<iUpper ) aSpan[iLower++] = 1;
-    }
+  for(i=0; rc==SQLITE_OK && i<pList->nExpr; i++){
+    nEst = p->aiRowEst[0];
+    rc = whereEqualScanEst(pParse, p, pList->a[i].pExpr, &nEst);
+    nRowEst += nEst;
   }
   if( rc==SQLITE_OK ){
-    for(i=nSpan=0; i<=SQLITE_INDEX_SAMPLES; i++){
-      if( aSpan[i] ){
-        nSpan++;
-      }else if( aSingle[i] ){
-        nSingle++;
-      }
-    }
-    nRowEst = (nSpan*2+nSingle)*p->aiRowEst[0]/(2*SQLITE_INDEX_SAMPLES)
-               + nNotFound*p->aiRowEst[1];
     if( nRowEst > p->aiRowEst[0] ) nRowEst = p->aiRowEst[0];
     *pnRow = nRowEst;
-    WHERETRACE(("IN row estimate: nSpan=%d, nSingle=%d, nNotFound=%d, est=%g\n",
-                 nSpan, nSingle, nNotFound, nRowEst));
+    WHERETRACE(("IN row estimate: est=%g\n", nRowEst));
   }
-  sqlite3ValueFree(pVal);
   return rc;
 }
-#endif /* defined(SQLITE_ENABLE_STAT2) */
+#endif /* defined(SQLITE_ENABLE_STAT3) */
 
 
 /*
@@ -2689,6 +2879,7 @@ static void bestBtreeIndex(
   Bitmask notReady,           /* Mask of cursors not available for indexing */
   Bitmask notValid,           /* Cursors not available for any purpose */
   ExprList *pOrderBy,         /* The ORDER BY clause */
+  ExprList *pDistinct,        /* The select-list if query is DISTINCT */
   WhereCost *pCost            /* Lowest cost query plan */
 ){
   int iCur = pSrc->iCursor;   /* The cursor of the table to be accessed */
@@ -2697,7 +2888,7 @@ static void bestBtreeIndex(
   int eqTermMask;             /* Current mask of valid equality operators */
   int idxEqTermMask;          /* Index mask of valid equality operators */
   Index sPk;                  /* A fake index object for the primary key */
-  unsigned int aiRowEstPk[2]; /* The aiRowEst[] value for the sPk index */
+  tRowcnt aiRowEstPk[2];      /* The aiRowEst[] value for the sPk index */
   int aiColumnPk = -1;        /* The aColumn[] value for the sPk index */
   int wsFlagMask;             /* Allowed flags in pCost->plan.wsFlag */
 
@@ -2752,10 +2943,10 @@ static void bestBtreeIndex(
   /* Loop over all indices looking for the best one to use
   */
   for(; pProbe; pIdx=pProbe=pProbe->pNext){
-    const unsigned int * const aiRowEst = pProbe->aiRowEst;
+    const tRowcnt * const aiRowEst = pProbe->aiRowEst;
     double cost;                /* Cost of using pProbe */
     double nRow;                /* Estimated number of rows in result set */
-    double log10N;              /* base-10 logarithm of nRow (inexact) */
+    double log10N = (double)1;  /* base-10 logarithm of nRow (inexact) */
     int rev;                    /* True to scan in reverse order */
     int wsFlags = 0;
     Bitmask used = 0;
@@ -2795,14 +2986,12 @@ static void bestBtreeIndex(
     **    IN operator must be a SELECT, not a value list, for this variable
     **    to be true.
     **
-    **  estBound:
-    **    An estimate on the amount of the table that must be searched.  A
-    **    value of 100 means the entire table is searched.  Range constraints
-    **    might reduce this to a value less than 100 to indicate that only
-    **    a fraction of the table needs searching.  In the absence of
-    **    sqlite_stat2 ANALYZE data, a single inequality reduces the search
-    **    space to 1/4rd its original size.  So an x>? constraint reduces
-    **    estBound to 25.  Two constraints (x>? AND x<?) reduce estBound to 6.
+    **  rangeDiv:
+    **    An estimate of a divisor by which to reduce the search space due
+    **    to inequality constraints.  In the absence of sqlite_stat3 ANALYZE
+    **    data, a single inequality reduces the search space to 1/4rd its
+    **    original size (rangeDiv==4).  Two inequalities reduce the search
+    **    space to 1/16th of its original size (rangeDiv==16).
     **
     **  bSort:   
     **    Boolean. True if there is an ORDER BY clause that will require an 
@@ -2827,12 +3016,13 @@ static void bestBtreeIndex(
     int nEq;                      /* Number of == or IN terms matching index */
     int bInEst = 0;               /* True if "x IN (SELECT...)" seen */
     int nInMul = 1;               /* Number of distinct equalities to lookup */
-    int estBound = 100;           /* Estimated reduction in search space */
+    double rangeDiv = (double)1;  /* Estimated reduction in search space */
     int nBound = 0;               /* Number of range constraints seen */
-    int bSort = 0;                /* True if external sort required */
+    int bSort = !!pOrderBy;       /* True if external sort required */
+    int bDist = !!pDistinct;      /* True if index cannot help with DISTINCT */
     int bLookup = 0;              /* True if not a covering index */
     WhereTerm *pTerm;             /* A single term of the WHERE clause */
-#ifdef SQLITE_ENABLE_STAT2
+#ifdef SQLITE_ENABLE_STAT3
     WhereTerm *pFirstTerm = 0;    /* First term matching the index */
 #endif
 
@@ -2842,6 +3032,7 @@ static void bestBtreeIndex(
       pTerm = findTerm(pWC, iCur, j, notReady, eqTermMask, pIdx);
       if( pTerm==0 ) break;
       wsFlags |= (WHERE_COLUMN_EQ|WHERE_ROWID_EQ);
+      testcase( pTerm->pWC!=pWC );
       if( pTerm->eOperator & WO_IN ){
         Expr *pExpr = pTerm->pExpr;
         wsFlags |= WHERE_COLUMN_IN;
@@ -2856,28 +3047,30 @@ static void bestBtreeIndex(
       }else if( pTerm->eOperator & WO_ISNULL ){
         wsFlags |= WHERE_COLUMN_NULL;
       }
-#ifdef SQLITE_ENABLE_STAT2
+#ifdef SQLITE_ENABLE_STAT3
       if( nEq==0 && pProbe->aSample ) pFirstTerm = pTerm;
 #endif
       used |= pTerm->prereqRight;
     }
 
-    /* Determine the value of estBound. */
+    /* Determine the value of rangeDiv */
     if( nEq<pProbe->nColumn && pProbe->bUnordered==0 ){
       int j = pProbe->aiColumn[nEq];
       if( findTerm(pWC, iCur, j, notReady, WO_LT|WO_LE|WO_GT|WO_GE, pIdx) ){
         WhereTerm *pTop = findTerm(pWC, iCur, j, notReady, WO_LT|WO_LE, pIdx);
         WhereTerm *pBtm = findTerm(pWC, iCur, j, notReady, WO_GT|WO_GE, pIdx);
-        whereRangeScanEst(pParse, pProbe, nEq, pBtm, pTop, &estBound);
+        whereRangeScanEst(pParse, pProbe, nEq, pBtm, pTop, &rangeDiv);
         if( pTop ){
           nBound = 1;
           wsFlags |= WHERE_TOP_LIMIT;
           used |= pTop->prereqRight;
+          testcase( pTop->pWC!=pWC );
         }
         if( pBtm ){
           nBound++;
           wsFlags |= WHERE_BTM_LIMIT;
           used |= pBtm->prereqRight;
+          testcase( pBtm->pWC!=pWC );
         }
         wsFlags |= (WHERE_COLUMN_RANGE|WHERE_ROWID_RANGE);
       }
@@ -2893,17 +3086,20 @@ static void bestBtreeIndex(
     ** naturally scan rows in the required order, set the appropriate flags
     ** in wsFlags. Otherwise, if there is an ORDER BY clause but the index
     ** will scan rows in a different order, set the bSort variable.  */
-    if( pOrderBy ){
-      if( (wsFlags & WHERE_COLUMN_IN)==0
-        && pProbe->bUnordered==0
-        && isSortingIndex(pParse, pWC->pMaskSet, pProbe, iCur, pOrderBy,
-                          nEq, wsFlags, &rev)
-      ){
-        wsFlags |= WHERE_ROWID_RANGE|WHERE_COLUMN_RANGE|WHERE_ORDERBY;
-        wsFlags |= (rev ? WHERE_REVERSE : 0);
-      }else{
-        bSort = 1;
-      }
+    if( isSortingIndex(
+          pParse, pWC->pMaskSet, pProbe, iCur, pOrderBy, nEq, wsFlags, &rev)
+    ){
+      bSort = 0;
+      wsFlags |= WHERE_ROWID_RANGE|WHERE_COLUMN_RANGE|WHERE_ORDERBY;
+      wsFlags |= (rev ? WHERE_REVERSE : 0);
+    }
+
+    /* If there is a DISTINCT qualifier and this index will scan rows in
+    ** order of the DISTINCT expressions, clear bDist and set the appropriate
+    ** flags in wsFlags. */
+    if( isDistinctIndex(pParse, pWC, pProbe, iCur, pDistinct, nEq) ){
+      bDist = 0;
+      wsFlags |= WHERE_ROWID_RANGE|WHERE_COLUMN_RANGE|WHERE_DISTINCT;
     }
 
     /* If currently calculating the cost of using an index (not the IPK
@@ -2937,27 +3133,30 @@ static void bestBtreeIndex(
       nInMul = (int)(nRow / aiRowEst[nEq]);
     }
 
-#ifdef SQLITE_ENABLE_STAT2
-    /* If the constraint is of the form x=VALUE and histogram
+#ifdef SQLITE_ENABLE_STAT3
+    /* If the constraint is of the form x=VALUE or x IN (E1,E2,...)
+    ** and we do not think that values of x are unique and if histogram
     ** data is available for column x, then it might be possible
     ** to get a better estimate on the number of rows based on
     ** VALUE and how common that value is according to the histogram.
     */
-    if( nRow>(double)1 && nEq==1 && pFirstTerm!=0 ){
+    if( nRow>(double)1 && nEq==1 && pFirstTerm!=0 && aiRowEst[1]>1 ){
+      assert( (pFirstTerm->eOperator & (WO_EQ|WO_ISNULL|WO_IN))!=0 );
       if( pFirstTerm->eOperator & (WO_EQ|WO_ISNULL) ){
         testcase( pFirstTerm->eOperator==WO_EQ );
         testcase( pFirstTerm->eOperator==WO_ISNULL );
         whereEqualScanEst(pParse, pProbe, pFirstTerm->pExpr->pRight, &nRow);
-      }else if( pFirstTerm->eOperator==WO_IN && bInEst==0 ){
+      }else if( bInEst==0 ){
+        assert( pFirstTerm->eOperator==WO_IN );
         whereInScanEst(pParse, pProbe, pFirstTerm->pExpr->x.pList, &nRow);
       }
     }
-#endif /* SQLITE_ENABLE_STAT2 */
+#endif /* SQLITE_ENABLE_STAT3 */
 
     /* Adjust the number of output rows and downward to reflect rows
     ** that are excluded by range constraints.
     */
-    nRow = (nRow * (double)estBound) / (double)100;
+    nRow = nRow/rangeDiv;
     if( nRow<1 ) nRow = 1;
 
     /* Experiments run on real SQLite databases show that the time needed
@@ -2968,7 +3167,7 @@ static void bestBtreeIndex(
     ** slower with larger records, presumably because fewer records fit
     ** on one page and hence more pages have to be fetched.
     **
-    ** The ANALYZE command and the sqlite_stat1 and sqlite_stat2 tables do
+    ** The ANALYZE command and the sqlite_stat1 and sqlite_stat3 tables do
     ** not give us data on the relative sizes of table and index records.
     ** So this computation assumes table records are about twice as big
     ** as index records
@@ -3020,6 +3219,9 @@ static void bestBtreeIndex(
     if( bSort ){
       cost += nRow*estLog(nRow)*3;
     }
+    if( bDist ){
+      cost += nRow*estLog(nRow)*3;
+    }
 
     /**** Cost of using this index has now been computed ****/
 
@@ -3083,10 +3285,10 @@ static void bestBtreeIndex(
 
 
     WHERETRACE((
-      "%s(%s): nEq=%d nInMul=%d estBound=%d bSort=%d bLookup=%d wsFlags=0x%x\n"
+      "%s(%s): nEq=%d nInMul=%d rangeDiv=%d bSort=%d bLookup=%d wsFlags=0x%x\n"
       "         notReady=0x%llx log10N=%.1f nRow=%.1f cost=%.1f used=0x%llx\n",
       pSrc->pTab->zName, (pIdx ? pIdx->zName : "ipk"), 
-      nEq, nInMul, estBound, bSort, bLookup, wsFlags,
+      nEq, nInMul, (int)rangeDiv, bSort, bLookup, wsFlags,
       notReady, log10N, nRow, cost, used
     ));
 
@@ -3165,7 +3367,7 @@ static void bestIndex(
   }else
 #endif
   {
-    bestBtreeIndex(pParse, pWC, pSrc, notReady, notValid, pOrderBy, pCost);
+    bestBtreeIndex(pParse, pWC, pSrc, notReady, notValid, pOrderBy, 0, pCost);
   }
 }
 
@@ -3590,7 +3792,8 @@ static Bitmask codeOneLoopStart(
   WhereInfo *pWInfo,   /* Complete information about the WHERE clause */
   int iLevel,          /* Which level of pWInfo->a[] should be coded */
   u16 wctrlFlags,      /* One of the WHERE_* flags defined in sqliteInt.h */
-  Bitmask notReady     /* Which tables are currently available */
+  Bitmask notReady,    /* Which tables are currently available */
+  Expr *pWhere         /* Complete WHERE clause */
 ){
   int j, k;            /* Loop counters */
   int iCur;            /* The VDBE cursor for the table */
@@ -4072,7 +4275,8 @@ static Bitmask codeOneLoopStart(
     int iLoopBody = sqlite3VdbeMakeLabel(v);  /* Start of loop body */
     int iRetInit;                             /* Address of regReturn init */
     int untestedTerms = 0;             /* Some terms not completely tested */
-    int ii;
+    int ii;                            /* Loop counter */
+    Expr *pAndExpr = 0;                /* An ".. AND (...)" expression */
    
     pTerm = pLevel->plan.u.pTerm;
     assert( pTerm!=0 );
@@ -4122,13 +4326,28 @@ static Bitmask codeOneLoopStart(
     }
     iRetInit = sqlite3VdbeAddOp2(v, OP_Integer, 0, regReturn);
 
+    /* If the original WHERE clause is z of the form:  (x1 OR x2 OR ...) AND y
+    ** Then for every term xN, evaluate as the subexpression: xN AND z
+    ** That way, terms in y that are factored into the disjunction will
+    ** be picked up by the recursive calls to sqlite3WhereBegin() below.
+    */
+    if( pWC->nTerm>1 ){
+      pAndExpr = sqlite3ExprAlloc(pParse->db, TK_AND, 0, 0);
+      pAndExpr->pRight = pWhere;
+    }
+
     for(ii=0; ii<pOrWc->nTerm; ii++){
       WhereTerm *pOrTerm = &pOrWc->a[ii];
       if( pOrTerm->leftCursor==iCur || pOrTerm->eOperator==WO_AND ){
         WhereInfo *pSubWInfo;          /* Info for single OR-term scan */
+        Expr *pOrExpr = pOrTerm->pExpr;
+        if( pAndExpr ){
+          pAndExpr->pLeft = pOrExpr;
+          pOrExpr = pAndExpr;
+        }
         /* Loop through table entries that match term pOrTerm. */
-        pSubWInfo = sqlite3WhereBegin(pParse, pOrTab, pOrTerm->pExpr, 0,
-                        WHERE_OMIT_OPEN | WHERE_OMIT_CLOSE |
+        pSubWInfo = sqlite3WhereBegin(pParse, pOrTab, pOrExpr, 0, 0,
+                        WHERE_OMIT_OPEN_CLOSE | WHERE_AND_ONLY |
                         WHERE_FORCE_TABLE | WHERE_ONETABLE_ONLY);
         if( pSubWInfo ){
           explainOneScan(
@@ -4156,6 +4375,7 @@ static Bitmask codeOneLoopStart(
         }
       }
     }
+    sqlite3DbFree(pParse->db, pAndExpr);
     sqlite3VdbeChangeP1(v, iRetInit, sqlite3VdbeCurrentAddr(v));
     sqlite3VdbeAddOp2(v, OP_Goto, 0, pLevel->addrBrk);
     sqlite3VdbeResolveLabel(v, iLoopBody);
@@ -4368,6 +4588,7 @@ WhereInfo *sqlite3WhereBegin(
   SrcList *pTabList,    /* A list of all tables to be scanned */
   Expr *pWhere,         /* The WHERE clause */
   ExprList **ppOrderBy, /* An ORDER BY clause, or NULL */
+  ExprList *pDistinct,  /* The select-list for DISTINCT queries - or NULL */
   u16 wctrlFlags        /* One of the WHERE_* flags defined in sqliteInt.h */
 ){
   int i;                     /* Loop counter */
@@ -4428,11 +4649,15 @@ WhereInfo *sqlite3WhereBegin(
   pWInfo->savedNQueryLoop = pParse->nQueryLoop;
   pMaskSet = (WhereMaskSet*)&pWC[1];
 
+  /* Disable the DISTINCT optimization if SQLITE_DistinctOpt is set via
+  ** sqlite3_test_ctrl(SQLITE_TESTCTRL_OPTIMIZATIONS,...) */
+  if( db->flags & SQLITE_DistinctOpt ) pDistinct = 0;
+
   /* Split the WHERE clause into separate subexpressions where each
   ** subexpression is separated by an AND operator.
   */
   initMaskSet(pMaskSet);
-  whereClauseInit(pWC, pParse, pMaskSet);
+  whereClauseInit(pWC, pParse, pMaskSet, wctrlFlags);
   sqlite3ExprCodeConstants(pParse, pWhere);
   whereSplit(pWC, pWhere, TK_AND);   /* IMP: R-15842-53296 */
     
@@ -4495,6 +4720,15 @@ WhereInfo *sqlite3WhereBegin(
     goto whereBeginError;
   }
 
+  /* Check if the DISTINCT qualifier, if there is one, is redundant. 
+  ** If it is, then set pDistinct to NULL and WhereInfo.eDistinct to
+  ** WHERE_DISTINCT_UNIQUE to tell the caller to ignore the DISTINCT.
+  */
+  if( pDistinct && isDistinctRedundant(pParse, pTabList, pWC, pDistinct) ){
+    pDistinct = 0;
+    pWInfo->eDistinct = WHERE_DISTINCT_UNIQUE;
+  }
+
   /* Chose the best index to use for each table in the FROM clause.
   **
   ** This loop fills in the following fields:
@@ -4578,6 +4812,7 @@ WhereInfo *sqlite3WhereBegin(
         int doNotReorder;    /* True if this table should not be reordered */
         WhereCost sCost;     /* Cost information from best[Virtual]Index() */
         ExprList *pOrderBy;  /* ORDER BY clause for index to optimize */
+        ExprList *pDist;     /* DISTINCT clause for index to optimize */
   
         doNotReorder =  (pTabItem->jointype & (JT_LEFT|JT_CROSS))!=0;
         if( j!=iFrom && doNotReorder ) break;
@@ -4588,6 +4823,7 @@ WhereInfo *sqlite3WhereBegin(
         }
         mask = (isOptimal ? m : notReady);
         pOrderBy = ((i==0 && ppOrderBy )?*ppOrderBy:0);
+        pDist = (i==0 ? pDistinct : 0);
         if( pTabItem->pIndex==0 ) nUnconstrained++;
   
         WHERETRACE(("=== trying table %d with isOptimal=%d ===\n",
@@ -4602,7 +4838,7 @@ WhereInfo *sqlite3WhereBegin(
 #endif
         {
           bestBtreeIndex(pParse, pWC, pTabItem, mask, notReady, pOrderBy,
-                         &sCost);
+              pDist, &sCost);
         }
         assert( isOptimal || (sCost.used&notReady)==0 );
 
@@ -4660,9 +4896,14 @@ WhereInfo *sqlite3WhereBegin(
     WHERETRACE(("*** Optimizer selects table %d for loop %d"
                 " with cost=%g and nRow=%g\n",
                 bestJ, pLevel-pWInfo->a, bestPlan.rCost, bestPlan.plan.nRow));
-    if( (bestPlan.plan.wsFlags & WHERE_ORDERBY)!=0 ){
+    /* The ALWAYS() that follows was added to hush up clang scan-build */
+    if( (bestPlan.plan.wsFlags & WHERE_ORDERBY)!=0 && ALWAYS(ppOrderBy) ){
       *ppOrderBy = 0;
     }
+    if( (bestPlan.plan.wsFlags & WHERE_DISTINCT)!=0 ){
+      assert( pWInfo->eDistinct==0 );
+      pWInfo->eDistinct = WHERE_DISTINCT_ORDERED;
+    }
     andFlags &= bestPlan.plan.wsFlags;
     pLevel->plan = bestPlan.plan;
     testcase( bestPlan.plan.wsFlags & WHERE_INDEXED );
@@ -4745,7 +4986,7 @@ WhereInfo *sqlite3WhereBegin(
     }else
 #endif
     if( (pLevel->plan.wsFlags & WHERE_IDX_ONLY)==0
-         && (wctrlFlags & WHERE_OMIT_OPEN)==0 ){
+         && (wctrlFlags & WHERE_OMIT_OPEN_CLOSE)==0 ){
       int op = pWInfo->okOnePass ? OP_OpenWrite : OP_OpenRead;
       sqlite3OpenTable(pParse, pTabItem->iCursor, iDb, pTab, op);
       testcase( pTab->nCol==BMS-1 );
@@ -4790,7 +5031,7 @@ WhereInfo *sqlite3WhereBegin(
   for(i=0; i<nTabList; i++){
     pLevel = &pWInfo->a[i];
     explainOneScan(pParse, pTabList, pLevel, i, pLevel->iFrom, wctrlFlags);
-    notReady = codeOneLoopStart(pWInfo, i, wctrlFlags, notReady);
+    notReady = codeOneLoopStart(pWInfo, i, wctrlFlags, notReady, pWhere);
     pWInfo->iContinue = pLevel->addrCont;
   }
 
@@ -4925,7 +5166,7 @@ void sqlite3WhereEnd(WhereInfo *pWInfo){
     assert( pTab!=0 );
     if( (pTab->tabFlags & TF_Ephemeral)==0
      && pTab->pSelect==0
-     && (pWInfo->wctrlFlags & WHERE_OMIT_CLOSE)==0
+     && (pWInfo->wctrlFlags & WHERE_OMIT_OPEN_CLOSE)==0
     ){
       int ws = pLevel->plan.wsFlags;
       if( !pWInfo->okOnePass && (ws & WHERE_IDX_ONLY)==0 ){
diff --git a/test/8_3_names.test b/test/8_3_names.test
index 418685e6..b53e28a9 100644
--- a/test/8_3_names.test
+++ b/test/8_3_names.test
@@ -67,8 +67,8 @@ do_test 8_3_names-2.1 {
   file exists test.nal
 } 1
 forcedelete test2.db test2.nal test2.db-journal
-file copy test.db test2.db
-file copy test.nal test2.nal
+copy_file test.db test2.db
+copy_file test.nal test2.nal
 do_test 8_3_names-2.2 {
   db eval {
     COMMIT;
@@ -101,8 +101,8 @@ do_test 8_3_names-3.1 {
   file exists test.nal
 } 0
 forcedelete test2.db test2.nal test2.db-journal
-file copy test.db test2.db
-file copy test.db-journal test2.db-journal
+copy_file test.db test2.db
+copy_file test.db-journal test2.db-journal
 do_test 8_3_names-3.2 {
   db eval {
     COMMIT;
diff --git a/test/all.test b/test/all.test
index 96712466..54302d02 100644
--- a/test/all.test
+++ b/test/all.test
@@ -38,6 +38,7 @@ run_test_suite pcache10
 run_test_suite pcache50 
 run_test_suite pcache90 
 run_test_suite pcache100
+run_test_suite prepare
 
 if {$::tcl_platform(platform)=="unix"} {
   ifcapable !default_autovacuum {
diff --git a/test/alter.test b/test/alter.test
index 359034d5..1481bc20 100644
--- a/test/alter.test
+++ b/test/alter.test
@@ -221,8 +221,8 @@ do_test alter-1.7 {
 #
 ifcapable attach {
   do_test alter-1.8.1 {
-    file delete -force test2.db
-    file delete -force test2.db-journal
+    forcedelete test2.db
+    forcedelete test2.db-journal
     execsql {
       ATTACH 'test2.db' AS aux;
     }
@@ -412,8 +412,8 @@ do_test alter-3.1.8 {
 
 # Make sure "ON" cannot be used as a database, table or column name without
 # quoting. Otherwise the sqlite_alter_trigger() function might not work.
-file delete -force test3.db
-file delete -force test3.db-journal
+forcedelete test3.db
+forcedelete test3.db-journal
 ifcapable attach {
   do_test alter-3.2.1 {
     catchsql {
@@ -846,7 +846,7 @@ do_test alter-14.2 {
 set system_table_list {1 sqlite_master}
 catchsql ANALYZE
 ifcapable analyze { lappend system_table_list 2 sqlite_stat1 }
-ifcapable stat2   { lappend system_table_list 3 sqlite_stat2 }
+ifcapable stat3   { lappend system_table_list 4 sqlite_stat3 }
 
 foreach {tn tbl} $system_table_list {
   do_test alter-15.$tn.1 {
diff --git a/test/alter2.test b/test/alter2.test
index 712960c0..14be637f 100644
--- a/test/alter2.test
+++ b/test/alter2.test
@@ -137,6 +137,7 @@ do_test alter2-1.8 {
 do_test alter2-1.9 {
   # ALTER TABLE abc ADD COLUMN d;
   alter_table abc {CREATE TABLE abc(a, b, c, d);}
+  if {[permutation] == "prepare"} { db cache flush }
   execsql { SELECT * FROM abc; }
   execsql {
     UPDATE abc SET d = 11 WHERE c IS NULL AND a<4;
@@ -314,8 +315,8 @@ do_test alter2-6.1 {
 } {2}
 ifcapable attach {
   do_test alter2-6.2 {
-    file delete -force test2.db-journal
-    file delete -force test2.db
+    forcedelete test2.db-journal
+    forcedelete test2.db
     execsql {
       ATTACH 'test2.db' AS aux;
       CREATE TABLE aux.t1(a, b);
diff --git a/test/alter3.test b/test/alter3.test
index 74ba33c5..28d293e2 100644
--- a/test/alter3.test
+++ b/test/alter3.test
@@ -196,7 +196,7 @@ ifcapable schema_version {
 
 do_test alter3-4.1 {
   db close
-  file delete -force test.db
+  forcedelete test.db
   set ::DB [sqlite3 db test.db]
   execsql {
     PRAGMA legacy_file_format=ON;
@@ -237,8 +237,8 @@ do_test alter3-4.99 {
 
 ifcapable attach {
   do_test alter3-5.1 {
-    file delete -force test2.db
-    file delete -force test2.db-journal
+    forcedelete test2.db
+    forcedelete test2.db-journal
     execsql {
       CREATE TABLE t1(a, b);
       INSERT INTO t1 VALUES(1, 'one');
diff --git a/test/alter4.test b/test/alter4.test
index 738db3fd..cda45533 100644
--- a/test/alter4.test
+++ b/test/alter4.test
@@ -178,7 +178,7 @@ ifcapable schema_version {
 
 do_test alter4-4.1 {
   db close
-  file delete -force test.db
+  forcedelete test.db
   set ::DB [sqlite3 db test.db]
   execsql {
     CREATE TEMP TABLE t1(a, b);
@@ -213,8 +213,8 @@ do_test alter4-4.99 {
 
 ifcapable attach {
   do_test alter4-5.1 {
-    file delete -force test2.db
-    file delete -force test2.db-journal
+    forcedelete test2.db
+    forcedelete test2.db-journal
     execsql {
       CREATE TEMP TABLE t1(a, b);
       INSERT INTO t1 VALUES(1, 'one');
diff --git a/test/analyze.test b/test/analyze.test
index 766cd50d..362702a9 100644
--- a/test/analyze.test
+++ b/test/analyze.test
@@ -287,6 +287,64 @@ do_test analyze-4.3 {
   }
 } {}
 
+# Verify that DROP TABLE and DROP INDEX remove entries from the 
+# sqlite_stat1 and sqlite_stat3 tables.
+#
+do_test analyze-5.0 {
+  execsql {
+    DELETE FROM t3;
+    DELETE FROM t4;
+    INSERT INTO t3 VALUES(1,2,3,4);
+    INSERT INTO t3 VALUES(5,6,7,8);
+    INSERT INTO t3 SELECT a+8, b+8, c+8, d+8 FROM t3;
+    INSERT INTO t3 SELECT a+16, b+16, c+16, d+16 FROM t3;
+    INSERT INTO t3 SELECT a+32, b+32, c+32, d+32 FROM t3;
+    INSERT INTO t3 SELECT a+64, b+64, c+64, d+64 FROM t3;
+    INSERT INTO t4 SELECT a, b, c FROM t3;
+    ANALYZE;
+    SELECT DISTINCT idx FROM sqlite_stat1 ORDER BY 1;
+    SELECT DISTINCT tbl FROM sqlite_stat1 ORDER BY 1;
+  }
+} {t3i1 t3i2 t3i3 t4i1 t4i2 t3 t4}
+ifcapable stat3 {
+  do_test analyze-5.1 {
+    execsql {
+      SELECT DISTINCT idx FROM sqlite_stat3 ORDER BY 1;
+      SELECT DISTINCT tbl FROM sqlite_stat3 ORDER BY 1;
+    }
+  } {t3i1 t3i2 t3i3 t4i1 t4i2 t3 t4}
+}
+do_test analyze-5.2 {
+  execsql {
+    DROP INDEX t3i2;
+    SELECT DISTINCT idx FROM sqlite_stat1 ORDER BY 1;
+    SELECT DISTINCT tbl FROM sqlite_stat1 ORDER BY 1;
+  }
+} {t3i1 t3i3 t4i1 t4i2 t3 t4}
+ifcapable stat3 {
+  do_test analyze-5.3 {
+    execsql {
+      SELECT DISTINCT idx FROM sqlite_stat3 ORDER BY 1;
+      SELECT DISTINCT tbl FROM sqlite_stat3 ORDER BY 1;
+    }
+  } {t3i1 t3i3 t4i1 t4i2 t3 t4}
+}
+do_test analyze-5.4 {
+  execsql {
+    DROP TABLE t3;
+    SELECT DISTINCT idx FROM sqlite_stat1 ORDER BY 1;
+    SELECT DISTINCT tbl FROM sqlite_stat1 ORDER BY 1;
+  }
+} {t4i1 t4i2 t4}
+ifcapable stat3 {
+  do_test analyze-5.5 {
+    execsql {
+      SELECT DISTINCT idx FROM sqlite_stat3 ORDER BY 1;
+      SELECT DISTINCT tbl FROM sqlite_stat3 ORDER BY 1;
+    }
+  } {t4i1 t4i2 t4}
+}
+
 # This test corrupts the database file so it must be the last test
 # in the series.
 #
diff --git a/test/analyze2.test b/test/analyze2.test
deleted file mode 100644
index de2567bb..00000000
--- a/test/analyze2.test
+++ /dev/null
@@ -1,554 +0,0 @@
-# 2009 August 06
-#
-# The author disclaims copyright to this source code.  In place of
-# a legal notice, here is a blessing:
-#
-#    May you do good and not evil.
-#    May you find forgiveness for yourself and forgive others.
-#    May you share freely, never taking more than you give.
-#
-#***********************************************************************
-#
-# This file implements regression tests for SQLite library. This file 
-# implements tests for the extra functionality provided by the ANALYZE 
-# command when the library is compiled with SQLITE_ENABLE_STAT2 defined.
-#
-
-set testdir [file dirname $argv0]
-source $testdir/tester.tcl
-
-ifcapable !stat2 {
-  finish_test
-  return
-}
-
-set testprefix analyze2
-
-# Do not use a codec for tests in this file, as the database file is
-# manipulated directly using tcl scripts (using the [hexio_write] command).
-#
-do_not_use_codec
-
-#--------------------------------------------------------------------
-# Test organization:
-#
-# analyze2-1.*: Tests to verify that ANALYZE creates and populates the
-#               sqlite_stat2 table as expected.
-#
-# analyze2-2.*: Test that when a table has two indexes on it and either
-#               index may be used for the scan, the index suggested by
-#               the contents of sqlite_stat2 table is prefered.
-# 
-# analyze2-3.*: Similar to the previous block of tests, but using tables
-#               that contain a mixture of NULL, numeric, text and blob
-#               values.
-#
-# analyze2-4.*: Check that when an indexed column uses a collation other
-#               than BINARY, the collation is taken into account when
-#               using the contents of sqlite_stat2 to estimate the cost
-#               of a range scan.
-#
-# analyze2-5.*: Check that collation sequences are used as described above
-#               even when the only available version of the collation 
-#               function require UTF-16 encoded arguments.
-#
-# analyze2-6.*: Check that the library behaves correctly when one of the
-#               sqlite_stat2 or sqlite_stat1 tables are missing.
-#
-# analyze2-7.*: Check that in a shared-schema situation, nothing goes
-#               wrong if sqlite_stat2 data is read by one connection,
-#               and freed by another.
-# 
-
-proc eqp {sql {db db}} {
-  uplevel execsql [list "EXPLAIN QUERY PLAN $sql"] $db
-}
-
-do_test analyze2-1.1 {
-  execsql { CREATE TABLE t1(x PRIMARY KEY) }
-  for {set i 0} {$i < 1000} {incr i} {
-    execsql { INSERT INTO t1 VALUES($i) }
-  }
-  execsql { 
-    ANALYZE;
-    SELECT * FROM sqlite_stat2;
-  }
-} [list t1 sqlite_autoindex_t1_1 0 50  \
-        t1 sqlite_autoindex_t1_1 1 149 \
-        t1 sqlite_autoindex_t1_1 2 249 \
-        t1 sqlite_autoindex_t1_1 3 349 \
-        t1 sqlite_autoindex_t1_1 4 449 \
-        t1 sqlite_autoindex_t1_1 5 549 \
-        t1 sqlite_autoindex_t1_1 6 649 \
-        t1 sqlite_autoindex_t1_1 7 749 \
-        t1 sqlite_autoindex_t1_1 8 849 \
-        t1 sqlite_autoindex_t1_1 9 949 \
-]
-
-do_test analyze2-1.2 {
-  execsql {
-    DELETE FROM t1 WHERe x>9;
-    ANALYZE;
-    SELECT tbl, idx, group_concat(sample, ' ') FROM sqlite_stat2;
-  }
-} {t1 sqlite_autoindex_t1_1 {0 1 2 3 4 5 6 7 8 9}}
-do_test analyze2-1.3 {
-  execsql {
-    DELETE FROM t1 WHERE x>8;
-    ANALYZE;
-    SELECT * FROM sqlite_stat2;
-  }
-} {}
-do_test analyze2-1.4 {
-  execsql {
-    DELETE FROM t1;
-    ANALYZE;
-    SELECT * FROM sqlite_stat2;
-  }
-} {}
-
-do_test analyze2-2.1 {
-  execsql { 
-    BEGIN;
-    DROP TABLE t1;
-    CREATE TABLE t1(x, y);
-    CREATE INDEX t1_x ON t1(x);
-    CREATE INDEX t1_y ON t1(y);
-  }
-  for {set i 0} {$i < 1000} {incr i} {
-    execsql { INSERT INTO t1 VALUES($i, $i) }
-  }
-  execsql COMMIT
-  execsql ANALYZE
-} {}
-do_eqp_test 2.2 {
-  SELECT * FROM t1 WHERE x>500 AND y>700
-} {
-  0 0 0 {SEARCH TABLE t1 USING INDEX t1_y (y>?) (~100 rows)}
-}
-do_eqp_test 2.3 {
-  SELECT * FROM t1 WHERE x>700 AND y>500
-} {
-  0 0 0 {SEARCH TABLE t1 USING INDEX t1_x (x>?) (~100 rows)}
-}
-do_eqp_test 2.3 {
-  SELECT * FROM t1 WHERE y>700 AND x>500
-} {
-  0 0 0 {SEARCH TABLE t1 USING INDEX t1_y (y>?) (~100 rows)}
-}
-do_eqp_test 2.4 {
-  SELECT * FROM t1 WHERE y>500 AND x>700
-} {
-  0 0 0 {SEARCH TABLE t1 USING INDEX t1_x (x>?) (~100 rows)}
-}
-do_eqp_test 2.5 {
-  SELECT * FROM t1 WHERE x BETWEEN 100 AND 200 AND y BETWEEN 400 AND 700
-} {
-  0 0 0 {SEARCH TABLE t1 USING INDEX t1_x (x>? AND x<?) (~25 rows)}
-}
-do_eqp_test 2.6 {
-  SELECT * FROM t1 WHERE x BETWEEN 100 AND 500 AND y BETWEEN 400 AND 700
-} {
-  0 0 0 {SEARCH TABLE t1 USING INDEX t1_y (y>? AND y<?) (~75 rows)}
-}
-do_eqp_test 2.7 {
-  SELECT * FROM t1 WHERE x BETWEEN -400 AND -300 AND y BETWEEN 100 AND 300
-} {
-  0 0 0 {SEARCH TABLE t1 USING INDEX t1_x (x>? AND x<?) (~12 rows)}
-}
-do_eqp_test 2.8 {
-  SELECT * FROM t1 WHERE x BETWEEN 100 AND 300 AND y BETWEEN -400 AND -300
-} {
-  0 0 0 {SEARCH TABLE t1 USING INDEX t1_y (y>? AND y<?) (~12 rows)}
-}
-do_eqp_test 2.9 {
-  SELECT * FROM t1 WHERE x BETWEEN 500 AND 100 AND y BETWEEN 100 AND 300
-} {
-  0 0 0 {SEARCH TABLE t1 USING INDEX t1_x (x>? AND x<?) (~12 rows)}
-}
-do_eqp_test 2.10 {
-  SELECT * FROM t1 WHERE x BETWEEN 100 AND 300 AND y BETWEEN 500 AND 100
-} {
-  0 0 0 {SEARCH TABLE t1 USING INDEX t1_y (y>? AND y<?) (~12 rows)}
-}
-
-do_test analyze2-3.1 {
-  set alphabet [list a b c d e f g h i j]
-  execsql BEGIN
-  for {set i 0} {$i < 1000} {incr i} {
-    set str    [lindex $alphabet [expr ($i/100)%10]] 
-    append str [lindex $alphabet [expr ($i/ 10)%10]]
-    append str [lindex $alphabet [expr ($i/  1)%10]]
-    execsql { INSERT INTO t1 VALUES($str, $str) }
-  }
-  execsql COMMIT
-  execsql ANALYZE
-  execsql { 
-    SELECT tbl,idx,group_concat(sample,' ') 
-    FROM sqlite_stat2 
-    WHERE idx = 't1_x' 
-    GROUP BY tbl,idx
-  }
-} {t1 t1_x {100 299 499 699 899 ajj cjj ejj gjj ijj}}
-do_test analyze2-3.2 {
-  execsql { 
-    SELECT tbl,idx,group_concat(sample,' ') 
-    FROM sqlite_stat2 
-    WHERE idx = 't1_y' 
-    GROUP BY tbl,idx
-  }
-} {t1 t1_y {100 299 499 699 899 ajj cjj ejj gjj ijj}}
-
-do_eqp_test 3.3 {
-  SELECT * FROM t1 WHERE x BETWEEN 100 AND 500 AND y BETWEEN 'a' AND 'b'
-} {
-  0 0 0 {SEARCH TABLE t1 USING INDEX t1_y (y>? AND y<?) (~50 rows)}
-}
-do_eqp_test 3.4 {
-  SELECT * FROM t1 WHERE x BETWEEN 100 AND 400 AND y BETWEEN 'a' AND 'h'
-} {
-  0 0 0 {SEARCH TABLE t1 USING INDEX t1_x (x>? AND x<?) (~100 rows)}
-}
-do_eqp_test 3.5 {
-  SELECT * FROM t1 WHERE x<'a' AND y>'h'
-} {
-  0 0 0 {SEARCH TABLE t1 USING INDEX t1_y (y>?) (~66 rows)}
-}
-do_eqp_test 3.6 {
-  SELECT * FROM t1 WHERE x<444 AND y>'h'
-} {
-  0 0 0 {SEARCH TABLE t1 USING INDEX t1_y (y>?) (~66 rows)}
-}
-do_eqp_test 3.7 {
-  SELECT * FROM t1 WHERE x<221 AND y>'g'
-} {
-  0 0 0 {SEARCH TABLE t1 USING INDEX t1_x (x<?) (~66 rows)}
-}
-
-do_test analyze2-4.1 {
-  execsql { CREATE TABLE t3(a COLLATE nocase, b) }
-  execsql { CREATE INDEX t3a ON t3(a) }
-  execsql { CREATE INDEX t3b ON t3(b) }
-  set alphabet [list A b C d E f G h I j]
-  execsql BEGIN
-  for {set i 0} {$i < 1000} {incr i} {
-    set str    [lindex $alphabet [expr ($i/100)%10]] 
-    append str [lindex $alphabet [expr ($i/ 10)%10]]
-    append str [lindex $alphabet [expr ($i/  1)%10]]
-    execsql { INSERT INTO t3 VALUES($str, $str) }
-  }
-  execsql COMMIT
-  execsql ANALYZE
-} {}
-do_test analyze2-4.2 {
-  execsql { 
-    PRAGMA automatic_index=OFF;
-    SELECT tbl,idx,group_concat(sample,' ') 
-    FROM sqlite_stat2 
-    WHERE idx = 't3a' 
-    GROUP BY tbl,idx;
-    PRAGMA automatic_index=ON;
-  }
-} {t3 t3a {AfA bEj CEj dEj EEj fEj GEj hEj IEj jEj}}
-do_test analyze2-4.3 {
-  execsql { 
-    SELECT tbl,idx,group_concat(sample,' ') 
-    FROM sqlite_stat2 
-    WHERE idx = 't3b' 
-    GROUP BY tbl,idx
-  }
-} {t3 t3b {AbA CIj EIj GIj IIj bIj dIj fIj hIj jIj}}
-
-do_eqp_test 4.4 {
-  SELECT * FROM t3 WHERE a > 'A' AND a < 'C' AND b > 'A' AND b < 'C'
-} {
-  0 0 0 {SEARCH TABLE t3 USING INDEX t3b (b>? AND b<?) (~11 rows)}
-}
-do_eqp_test 4.5 {
-  SELECT * FROM t3 WHERE a > 'A' AND a < 'c' AND b > 'A' AND b < 'c'
-} {
-  0 0 0 {SEARCH TABLE t3 USING INDEX t3a (a>? AND a<?) (~22 rows)}
-}
-
-ifcapable utf16 {
-  proc test_collate {enc lhs rhs} {
-    # puts $enc
-    return [string compare $lhs $rhs]
-  }
-  do_test analyze2-5.1 {
-    add_test_collate db 0 0 1
-    execsql { CREATE TABLE t4(x COLLATE test_collate) }
-    execsql { CREATE INDEX t4x ON t4(x) }
-    set alphabet [list a b c d e f g h i j]
-    execsql BEGIN
-    for {set i 0} {$i < 1000} {incr i} {
-      set str    [lindex $alphabet [expr ($i/100)%10]] 
-      append str [lindex $alphabet [expr ($i/ 10)%10]]
-      append str [lindex $alphabet [expr ($i/  1)%10]]
-      execsql { INSERT INTO t4 VALUES($str) }
-    }
-    execsql COMMIT
-    execsql ANALYZE
-  } {}
-  do_test analyze2-5.2 {
-    execsql { 
-      SELECT tbl,idx,group_concat(sample,' ') 
-      FROM sqlite_stat2 
-      WHERE tbl = 't4' 
-      GROUP BY tbl,idx
-    }
-  } {t4 t4x {afa bej cej dej eej fej gej hej iej jej}}
-  do_eqp_test 5.3 {
-    SELECT * FROM t4 WHERE x>'ccc'
-  } {0 0 0 {SEARCH TABLE t4 USING COVERING INDEX t4x (x>?) (~800 rows)}}
-  do_eqp_test 5.4 {
-    SELECT * FROM t4 AS t41, t4 AS t42 WHERE t41.x>'ccc' AND t42.x>'ggg'
-  } {
-    0 0 1 {SEARCH TABLE t4 AS t42 USING COVERING INDEX t4x (x>?) (~300 rows)} 
-    0 1 0 {SEARCH TABLE t4 AS t41 USING COVERING INDEX t4x (x>?) (~800 rows)}
-  }
-  do_eqp_test 5.5 {
-    SELECT * FROM t4 AS t41, t4 AS t42 WHERE t41.x>'ddd' AND t42.x>'ccc'
-  } {
-    0 0 0 {SEARCH TABLE t4 AS t41 USING COVERING INDEX t4x (x>?) (~700 rows)} 
-    0 1 1 {SEARCH TABLE t4 AS t42 USING COVERING INDEX t4x (x>?) (~800 rows)}
-  }
-}
-
-#--------------------------------------------------------------------
-# These tests, analyze2-6.*, verify that the library behaves correctly
-# when one of the sqlite_stat1 and sqlite_stat2 tables is missing.
-#
-# If the sqlite_stat1 table is not present, then the sqlite_stat2
-# table is not read. However, if it is the sqlite_stat2 table that
-# is missing, the data in the sqlite_stat1 table is still used.
-#
-# Tests analyze2-6.1.* test the libary when the sqlite_stat2 table
-# is missing. Tests analyze2-6.2.* test the library when sqlite_stat1
-# is not present.
-#
-do_test analyze2-6.0 {
-  execsql {
-    DROP TABLE IF EXISTS t4;
-    CREATE TABLE t5(a, b); CREATE INDEX t5i ON t5(a, b);
-    CREATE TABLE t6(a, b); CREATE INDEX t6i ON t6(a, b);
-  }
-  for {set ii 0} {$ii < 20} {incr ii} {
-    execsql {
-      INSERT INTO t5 VALUES($ii, $ii);
-      INSERT INTO t6 VALUES($ii/10, $ii/10);
-    }
-  }
-  execsql { 
-    CREATE TABLE master AS 
-    SELECT * FROM sqlite_master WHERE name LIKE 'sqlite_stat%' 
-  }
-} {}
-
-do_test analyze2-6.1.1 {
-  eqp {SELECT * FROM t5,t6 WHERE t5.rowid=t6.rowid AND 
-       t5.a = 1 AND
-       t6.a = 1 AND t6.b = 1
-  }
-} {0 0 1 {SEARCH TABLE t6 USING COVERING INDEX t6i (a=? AND b=?) (~9 rows)} 0 1 0 {SEARCH TABLE t5 USING INTEGER PRIMARY KEY (rowid=?) (~1 rows)}}
-do_test analyze2-6.1.2 {
-  db cache flush
-  execsql ANALYZE
-  eqp {SELECT * FROM t5,t6 WHERE t5.rowid=t6.rowid AND 
-       t5.a = 1 AND
-       t6.a = 1 AND t6.b = 1
-  }
-} {0 0 0 {SEARCH TABLE t5 USING COVERING INDEX t5i (a=?) (~1 rows)} 0 1 1 {SEARCH TABLE t6 USING INTEGER PRIMARY KEY (rowid=?) (~1 rows)}}
-do_test analyze2-6.1.3 {
-  sqlite3 db test.db
-  eqp { SELECT * FROM t5,t6 WHERE t5.rowid=t6.rowid AND 
-       t5.a = 1 AND
-       t6.a = 1 AND t6.b = 1
-  }
-} {0 0 0 {SEARCH TABLE t5 USING COVERING INDEX t5i (a=?) (~1 rows)} 0 1 1 {SEARCH TABLE t6 USING INTEGER PRIMARY KEY (rowid=?) (~1 rows)}}
-do_test analyze2-6.1.4 {
-  execsql { 
-    PRAGMA writable_schema = 1;
-    DELETE FROM sqlite_master WHERE tbl_name = 'sqlite_stat2';
-  }
-  sqlite3 db test.db
-  eqp { SELECT * FROM t5,t6 WHERE t5.rowid=t6.rowid AND 
-       t5.a = 1 AND
-       t6.a = 1 AND t6.b = 1
-  }
-} {0 0 0 {SEARCH TABLE t5 USING COVERING INDEX t5i (a=?) (~1 rows)} 0 1 1 {SEARCH TABLE t6 USING INTEGER PRIMARY KEY (rowid=?) (~1 rows)}}
-do_test analyze2-6.1.5 {
-  execsql { 
-    PRAGMA writable_schema = 1;
-    DELETE FROM sqlite_master WHERE tbl_name = 'sqlite_stat1';
-  }
-  sqlite3 db test.db
-  eqp { SELECT * FROM t5,t6 WHERE t5.rowid=t6.rowid AND 
-       t5.a = 1 AND
-       t6.a = 1 AND t6.b = 1
-  }
-} {0 0 1 {SEARCH TABLE t6 USING COVERING INDEX t6i (a=? AND b=?) (~9 rows)} 0 1 0 {SEARCH TABLE t5 USING INTEGER PRIMARY KEY (rowid=?) (~1 rows)}}
-do_test analyze2-6.1.6 {
-  execsql { 
-    PRAGMA writable_schema = 1;
-    INSERT INTO sqlite_master SELECT * FROM master;
-  }
-  sqlite3 db test.db
-  eqp { SELECT * FROM t5,t6 WHERE t5.rowid=t6.rowid AND 
-       t5.a = 1 AND
-       t6.a = 1 AND t6.b = 1
-  }
-} {0 0 0 {SEARCH TABLE t5 USING COVERING INDEX t5i (a=?) (~1 rows)} 0 1 1 {SEARCH TABLE t6 USING INTEGER PRIMARY KEY (rowid=?) (~1 rows)}}
-
-do_test analyze2-6.2.1 {
-  execsql { 
-    DELETE FROM sqlite_stat1;
-    DELETE FROM sqlite_stat2;
-  }
-  sqlite3 db test.db
-  eqp { SELECT * FROM t5,t6 WHERE t5.rowid=t6.rowid AND 
-        t5.a>1 AND t5.a<15 AND
-        t6.a>1
-  }
-} {0 0 0 {SEARCH TABLE t5 USING COVERING INDEX t5i (a>? AND a<?) (~60000 rows)} 0 1 1 {SEARCH TABLE t6 USING INTEGER PRIMARY KEY (rowid=?) (~1 rows)}}
-do_test analyze2-6.2.2 {
-  db cache flush
-  execsql ANALYZE
-  eqp { SELECT * FROM t5,t6 WHERE t5.rowid=t6.rowid AND 
-        t5.a>1 AND t5.a<15 AND
-        t6.a>1
-  }
-} {0 0 1 {SEARCH TABLE t6 USING COVERING INDEX t6i (a>?) (~1 rows)} 0 1 0 {SEARCH TABLE t5 USING INTEGER PRIMARY KEY (rowid=?) (~1 rows)}}
-do_test analyze2-6.2.3 {
-  sqlite3 db test.db
-  eqp { SELECT * FROM t5,t6 WHERE t5.rowid=t6.rowid AND 
-        t5.a>1 AND t5.a<15 AND
-        t6.a>1
-  }
-} {0 0 1 {SEARCH TABLE t6 USING COVERING INDEX t6i (a>?) (~1 rows)} 0 1 0 {SEARCH TABLE t5 USING INTEGER PRIMARY KEY (rowid=?) (~1 rows)}}
-do_test analyze2-6.2.4 {
-  execsql { 
-    PRAGMA writable_schema = 1;
-    DELETE FROM sqlite_master WHERE tbl_name = 'sqlite_stat1';
-  }
-  sqlite3 db test.db
-  eqp { SELECT * FROM t5,t6 WHERE t5.rowid=t6.rowid AND 
-        t5.a>1 AND t5.a<15 AND
-        t6.a>1
-  }
-} {0 0 0 {SEARCH TABLE t5 USING COVERING INDEX t5i (a>? AND a<?) (~60000 rows)} 0 1 1 {SEARCH TABLE t6 USING INTEGER PRIMARY KEY (rowid=?) (~1 rows)}}
-do_test analyze2-6.2.5 {
-  execsql { 
-    PRAGMA writable_schema = 1;
-    DELETE FROM sqlite_master WHERE tbl_name = 'sqlite_stat2';
-  }
-  sqlite3 db test.db
-  eqp { SELECT * FROM t5,t6 WHERE t5.rowid=t6.rowid AND 
-        t5.a>1 AND t5.a<15 AND
-        t6.a>1
-  }
-} {0 0 0 {SEARCH TABLE t5 USING COVERING INDEX t5i (a>? AND a<?) (~60000 rows)} 0 1 1 {SEARCH TABLE t6 USING INTEGER PRIMARY KEY (rowid=?) (~1 rows)}}
-do_test analyze2-6.2.6 {
-  execsql { 
-    PRAGMA writable_schema = 1;
-    INSERT INTO sqlite_master SELECT * FROM master;
-  }
-  sqlite3 db test.db
-  execsql ANALYZE
-  eqp { SELECT * FROM t5,t6 WHERE t5.rowid=t6.rowid AND 
-        t5.a>1 AND t5.a<15 AND
-        t6.a>1
-  }
-} {0 0 1 {SEARCH TABLE t6 USING COVERING INDEX t6i (a>?) (~1 rows)} 0 1 0 {SEARCH TABLE t5 USING INTEGER PRIMARY KEY (rowid=?) (~1 rows)}}
-
-#--------------------------------------------------------------------
-# These tests, analyze2-7.*, test that the sqlite_stat2 functionality
-# works in shared-cache mode. Note that these tests reuse the database
-# created for the analyze2-6.* tests.
-#
-ifcapable shared_cache {
-  db close
-  set ::enable_shared_cache [sqlite3_enable_shared_cache 1]
-
-  proc incr_schema_cookie {zDb} {
-    foreach iOffset {24 40} {
-      set cookie [hexio_get_int [hexio_read $zDb $iOffset 4]]
-      incr cookie
-      hexio_write $zDb $iOffset [hexio_render_int32 $cookie]
-    }
-  }
-
-  do_test analyze2-7.1 {
-    sqlite3 db1 test.db
-    sqlite3 db2 test.db
-    db1 cache size 0
-    db2 cache size 0
-    execsql { SELECT count(*) FROM t5 } db1
-  } {20}
-  do_test analyze2-7.2 {
-    incr_schema_cookie test.db
-    execsql { SELECT count(*) FROM t5 } db2
-  } {20}
-  do_test analyze2-7.3 {
-    incr_schema_cookie test.db
-    execsql { SELECT count(*) FROM t5 } db1
-  } {20}
-  do_test analyze2-7.4 {
-    incr_schema_cookie test.db
-    execsql { SELECT count(*) FROM t5 } db2
-  } {20}
-
-  do_test analyze2-7.5 {
-    eqp { SELECT * FROM t5,t6 WHERE t5.rowid=t6.rowid AND 
-          t5.a>1 AND t5.a<15 AND
-          t6.a>1
-    } db1
-  } {0 0 1 {SEARCH TABLE t6 USING COVERING INDEX t6i (a>?) (~1 rows)} 0 1 0 {SEARCH TABLE t5 USING INTEGER PRIMARY KEY (rowid=?) (~1 rows)}}
-  do_test analyze2-7.6 {
-    incr_schema_cookie test.db
-    execsql { SELECT * FROM sqlite_master } db2
-    eqp { SELECT * FROM t5,t6 WHERE t5.rowid=t6.rowid AND 
-          t5.a>1 AND t5.a<15 AND
-          t6.a>1
-    } db2
-  } {0 0 1 {SEARCH TABLE t6 USING COVERING INDEX t6i (a>?) (~1 rows)} 0 1 0 {SEARCH TABLE t5 USING INTEGER PRIMARY KEY (rowid=?) (~1 rows)}}
-  do_test analyze2-7.7 {
-    incr_schema_cookie test.db
-    execsql { SELECT * FROM sqlite_master } db1
-    eqp { SELECT * FROM t5,t6 WHERE t5.rowid=t6.rowid AND 
-          t5.a>1 AND t5.a<15 AND
-          t6.a>1
-    } db1
-  } {0 0 1 {SEARCH TABLE t6 USING COVERING INDEX t6i (a>?) (~1 rows)} 0 1 0 {SEARCH TABLE t5 USING INTEGER PRIMARY KEY (rowid=?) (~1 rows)}}
-
-  do_test analyze2-7.8 {
-    execsql { DELETE FROM sqlite_stat2 } db2
-    execsql { SELECT * FROM sqlite_master } db1
-    eqp { SELECT * FROM t5,t6 WHERE t5.rowid=t6.rowid AND 
-          t5.a>1 AND t5.a<15 AND
-          t6.a>1
-    } db1
-  } {0 0 1 {SEARCH TABLE t6 USING COVERING INDEX t6i (a>?) (~1 rows)} 0 1 0 {SEARCH TABLE t5 USING INTEGER PRIMARY KEY (rowid=?) (~1 rows)}}
-  do_test analyze2-7.9 {
-    execsql { SELECT * FROM sqlite_master } db2
-    eqp { SELECT * FROM t5,t6 WHERE t5.rowid=t6.rowid AND 
-          t5.a>1 AND t5.a<15 AND
-          t6.a>1
-    } db2
-  } {0 0 1 {SEARCH TABLE t6 USING COVERING INDEX t6i (a>?) (~1 rows)} 0 1 0 {SEARCH TABLE t5 USING INTEGER PRIMARY KEY (rowid=?) (~1 rows)}}
-
-  do_test analyze2-7.10 {
-    incr_schema_cookie test.db
-    execsql { SELECT * FROM sqlite_master } db1
-    eqp { SELECT * FROM t5,t6 WHERE t5.rowid=t6.rowid AND 
-          t5.a>1 AND t5.a<15 AND
-          t6.a>1
-    } db1
-  } {0 0 0 {SEARCH TABLE t5 USING COVERING INDEX t5i (a>? AND a<?) (~1 rows)} 0 1 1 {SEARCH TABLE t6 USING INTEGER PRIMARY KEY (rowid=?) (~1 rows)}}
-
-  db1 close
-  db2 close
-  sqlite3_enable_shared_cache $::enable_shared_cache
-}
-
-finish_test
diff --git a/test/analyze3.test b/test/analyze3.test
index 2378ffaa..f705bc66 100644
--- a/test/analyze3.test
+++ b/test/analyze3.test
@@ -17,7 +17,7 @@
 set testdir [file dirname $argv0]
 source $testdir/tester.tcl
 
-ifcapable !stat2 {
+ifcapable !stat3 {
   finish_test
   return
 }
@@ -70,7 +70,7 @@ proc sf_execsql {sql {db db}} {
 #   Show that there are two possible plans for querying the table with
 #   a range constraint on the indexed column - "full table scan" or "use 
 #   the index". When the range is specified using literal values, SQLite
-#   is able to pick the best plan based on the samples in sqlite_stat2.
+#   is able to pick the best plan based on the samples in sqlite_stat3.
 #
 # analyze3-1.1.4 - 3.1.9
 #   Show that using SQL variables produces the same results as using
@@ -97,10 +97,10 @@ do_test analyze3-1.1.1 {
 
 do_eqp_test analyze3-1.1.2 {
   SELECT sum(y) FROM t1 WHERE x>200 AND x<300
-} {0 0 0 {SEARCH TABLE t1 USING INDEX i1 (x>? AND x<?) (~100 rows)}}
+} {0 0 0 {SEARCH TABLE t1 USING INDEX i1 (x>? AND x<?) (~179 rows)}}
 do_eqp_test analyze3-1.1.3 {
   SELECT sum(y) FROM t1 WHERE x>0 AND x<1100 
-} {0 0 0 {SCAN TABLE t1 (~111 rows)}}
+} {0 0 0 {SEARCH TABLE t1 USING INDEX i1 (x>? AND x<?) (~959 rows)}}
 
 do_test analyze3-1.1.4 {
   sf_execsql { SELECT sum(y) FROM t1 WHERE x>200 AND x<300 }
@@ -117,17 +117,17 @@ do_test analyze3-1.1.6 {
 } {199 0 14850}
 do_test analyze3-1.1.7 {
   sf_execsql { SELECT sum(y) FROM t1 WHERE x>0 AND x<1100 }
-} {999 999 499500}
+} {2000 0 499500}
 do_test analyze3-1.1.8 {
   set l [string range "0" 0 end]
   set u [string range "1100" 0 end]
   sf_execsql { SELECT sum(y) FROM t1 WHERE x>$l AND x<$u }
-} {999 999 499500}
+} {2000 0 499500}
 do_test analyze3-1.1.9 {
   set l [expr int(0)]
   set u [expr int(1100)]
   sf_execsql { SELECT sum(y) FROM t1 WHERE x>$l AND x<$u }
-} {999 999 499500}
+} {2000 0 499500}
 
 
 # The following tests are similar to the block above. The difference is
@@ -146,10 +146,10 @@ do_test analyze3-1.2.1 {
 } {}
 do_eqp_test analyze3-1.2.2 {
   SELECT sum(y) FROM t2 WHERE x>1 AND x<2
-} {0 0 0 {SEARCH TABLE t2 USING INDEX i2 (x>? AND x<?) (~200 rows)}}
+} {0 0 0 {SEARCH TABLE t2 USING INDEX i2 (x>? AND x<?) (~196 rows)}}
 do_eqp_test analyze3-1.2.3 {
   SELECT sum(y) FROM t2 WHERE x>0 AND x<99
-} {0 0 0 {SCAN TABLE t2 (~111 rows)}}
+} {0 0 0 {SEARCH TABLE t2 USING INDEX i2 (x>? AND x<?) (~968 rows)}}
 do_test analyze3-1.2.4 {
   sf_execsql { SELECT sum(y) FROM t2 WHERE x>12 AND x<20 }
 } {161 0 4760}
@@ -165,17 +165,17 @@ do_test analyze3-1.2.6 {
 } {161 0 integer integer 4760}
 do_test analyze3-1.2.7 {
   sf_execsql { SELECT sum(y) FROM t2 WHERE x>0 AND x<99 }
-} {999 999 490555}
+} {1981 0 490555}
 do_test analyze3-1.2.8 {
   set l [string range "0" 0 end]
   set u [string range "99" 0 end]
   sf_execsql {SELECT typeof($l), typeof($u), sum(y) FROM t2 WHERE x>$l AND x<$u}
-} {999 999 text text 490555}
+} {1981 0 text text 490555}
 do_test analyze3-1.2.9 {
   set l [expr int(0)]
   set u [expr int(99)]
   sf_execsql {SELECT typeof($l), typeof($u), sum(y) FROM t2 WHERE x>$l AND x<$u}
-} {999 999 integer integer 490555}
+} {1981 0 integer integer 490555}
 
 # Same tests a third time. This time, column x has INTEGER affinity and
 # is not the leftmost column of the table. This triggered a bug causing
@@ -193,10 +193,10 @@ do_test analyze3-1.3.1 {
 } {}
 do_eqp_test analyze3-1.3.2 {
   SELECT sum(y) FROM t3 WHERE x>200 AND x<300
-} {0 0 0 {SEARCH TABLE t3 USING INDEX i3 (x>? AND x<?) (~100 rows)}}
+} {0 0 0 {SEARCH TABLE t3 USING INDEX i3 (x>? AND x<?) (~156 rows)}}
 do_eqp_test analyze3-1.3.3 {
   SELECT sum(y) FROM t3 WHERE x>0 AND x<1100
-} {0 0 0 {SCAN TABLE t3 (~111 rows)}}
+} {0 0 0 {SEARCH TABLE t3 USING INDEX i3 (x>? AND x<?) (~989 rows)}}
 
 do_test analyze3-1.3.4 {
   sf_execsql { SELECT sum(y) FROM t3 WHERE x>200 AND x<300 }
@@ -213,17 +213,17 @@ do_test analyze3-1.3.6 {
 } {199 0 14850}
 do_test analyze3-1.3.7 {
   sf_execsql { SELECT sum(y) FROM t3 WHERE x>0 AND x<1100 }
-} {999 999 499500}
+} {2000 0 499500}
 do_test analyze3-1.3.8 {
   set l [string range "0" 0 end]
   set u [string range "1100" 0 end]
   sf_execsql { SELECT sum(y) FROM t3 WHERE x>$l AND x<$u }
-} {999 999 499500}
+} {2000 0 499500}
 do_test analyze3-1.3.9 {
   set l [expr int(0)]
   set u [expr int(1100)]
   sf_execsql { SELECT sum(y) FROM t3 WHERE x>$l AND x<$u }
-} {999 999 499500}
+} {2000 0 499500}
 
 #-------------------------------------------------------------------------
 # Test that the values of bound SQL variables may be used for the LIKE
@@ -248,7 +248,7 @@ do_test analyze3-2.1 {
 } {}
 do_eqp_test analyze3-2.2 {
   SELECT count(a) FROM t1 WHERE b LIKE 'a%'
-} {0 0 0 {SEARCH TABLE t1 USING INDEX i1 (b>? AND b<?) (~30000 rows)}}
+} {0 0 0 {SEARCH TABLE t1 USING INDEX i1 (b>? AND b<?) (~31250 rows)}}
 do_eqp_test analyze3-2.3 {
   SELECT count(a) FROM t1 WHERE b LIKE '%a'
 } {0 0 0 {SCAN TABLE t1 (~500000 rows)}}
diff --git a/test/analyze5.test b/test/analyze5.test
index a0469da1..1041d709 100644
--- a/test/analyze5.test
+++ b/test/analyze5.test
@@ -10,14 +10,14 @@
 #***********************************************************************
 #
 # This file implements tests for SQLite library.  The focus of the tests
-# in this file is the use of the sqlite_stat2 histogram data on tables
+# in this file is the use of the sqlite_stat3 histogram data on tables
 # with many repeated values and only a few distinct values.
 #
 
 set testdir [file dirname $argv0]
 source $testdir/tester.tcl
 
-ifcapable !stat2 {
+ifcapable !stat3 {
   finish_test
   return
 }
@@ -55,114 +55,102 @@ do_test analyze5-1.0 {
     CREATE INDEX t1y ON t1(y);  -- integers 0 and very few 1s
     CREATE INDEX t1z ON t1(z);  -- integers 0, 1, 2, and 3
     ANALYZE;
-    SELECT sample FROM sqlite_stat2 WHERE idx='t1u' ORDER BY sampleno;
+    SELECT sample FROM sqlite_stat3 WHERE idx='t1u' ORDER BY nlt;
   }
-} {alpha alpha alpha alpha bravo bravo bravo charlie charlie delta}
-do_test analyze5-1.1 {
-  string tolower \
-   [db eval {SELECT sample from sqlite_stat2 WHERE idx='t1v' ORDER BY sampleno}]
-} {alpha alpha alpha alpha bravo bravo bravo charlie charlie delta}
-do_test analyze5-1.2 {
-  db eval {SELECT sample from sqlite_stat2 WHERE idx='t1w' ORDER BY sampleno}
-} {{} 0 0 0 0 1 1 1 2 2}
-do_test analyze5-1.3 {
-  db eval {SELECT sample from sqlite_stat2 WHERE idx='t1x' ORDER BY sampleno}
-} {{} {} {} {} 1 1 1 2 2 3}
-do_test analyze5-1.4 {
-  db eval {SELECT sample from sqlite_stat2 WHERE idx='t1y' ORDER BY sampleno}
-} {0 0 0 0 0 0 0 0 0 0}
-do_test analyze5-1.5 {
-  db eval {SELECT sample from sqlite_stat2 WHERE idx='t1z' ORDER BY sampleno}
-} {0 0 0 0 1 1 1 2 2 3}
-do_test analyze5-1.6 {
-  db eval {SELECT sample from sqlite_stat2 WHERE idx='t1t' ORDER BY sampleno}
-} {0.5 0.5 0.5 0.5 1.5 1.5 1.5 2.5 2.5 3.5}
+} {alpha bravo charlie delta}
 
+do_test analyze5-1.1 {
+  db eval {SELECT DISTINCT lower(sample) FROM sqlite_stat3 WHERE idx='t1v'
+             ORDER BY 1}
+} {alpha bravo charlie delta}
+do_test analyze5-1.2 {
+  db eval {SELECT idx, count(*) FROM sqlite_stat3 GROUP BY 1 ORDER BY 1}
+} {t1t 4 t1u 4 t1v 4 t1w 4 t1x 4 t1y 2 t1z 4}
 
 # Verify that range queries generate the correct row count estimates
 #
 foreach {testid where index rows} {
     1  {z>=0 AND z<=0}       t1z  400
     2  {z>=1 AND z<=1}       t1z  300
-    3  {z>=2 AND z<=2}       t1z  200
-    4  {z>=3 AND z<=3}       t1z  100
-    5  {z>=4 AND z<=4}       t1z   50
-    6  {z>=-1 AND z<=-1}     t1z   50
-    7  {z>1 AND z<3}         t1z  200
+    3  {z>=2 AND z<=2}       t1z  175
+    4  {z>=3 AND z<=3}       t1z  125
+    5  {z>=4 AND z<=4}       t1z    1
+    6  {z>=-1 AND z<=-1}     t1z    1
+    7  {z>1 AND z<3}         t1z  175
     8  {z>0 AND z<100}       t1z  600
     9  {z>=1 AND z<100}      t1z  600
    10  {z>1 AND z<100}       t1z  300
    11  {z>=2 AND z<100}      t1z  300
-   12  {z>2 AND z<100}       t1z  100
-   13  {z>=3 AND z<100}      t1z  100
-   14  {z>3 AND z<100}       t1z   50
-   15  {z>=4 AND z<100}      t1z   50
-   16  {z>=-100 AND z<=-1}   t1z   50
+   12  {z>2 AND z<100}       t1z  125
+   13  {z>=3 AND z<100}      t1z  125
+   14  {z>3 AND z<100}       t1z    1
+   15  {z>=4 AND z<100}      t1z    1
+   16  {z>=-100 AND z<=-1}   t1z    1
    17  {z>=-100 AND z<=0}    t1z  400
-   18  {z>=-100 AND z<0}     t1z   50
+   18  {z>=-100 AND z<0}     t1z    1
    19  {z>=-100 AND z<=1}    t1z  700
    20  {z>=-100 AND z<2}     t1z  700
-   21  {z>=-100 AND z<=2}    t1z  900
-   22  {z>=-100 AND z<3}     t1z  900
+   21  {z>=-100 AND z<=2}    t1z  875
+   22  {z>=-100 AND z<3}     t1z  875
   
    31  {z>=0.0 AND z<=0.0}   t1z  400
    32  {z>=1.0 AND z<=1.0}   t1z  300
-   33  {z>=2.0 AND z<=2.0}   t1z  200
-   34  {z>=3.0 AND z<=3.0}   t1z  100
-   35  {z>=4.0 AND z<=4.0}   t1z   50
-   36  {z>=-1.0 AND z<=-1.0} t1z   50
-   37  {z>1.5 AND z<3.0}     t1z  200
-   38  {z>0.5 AND z<100}     t1z  600
+   33  {z>=2.0 AND z<=2.0}   t1z  175
+   34  {z>=3.0 AND z<=3.0}   t1z  125
+   35  {z>=4.0 AND z<=4.0}   t1z    1
+   36  {z>=-1.0 AND z<=-1.0} t1z    1
+   37  {z>1.5 AND z<3.0}     t1z  174
+   38  {z>0.5 AND z<100}     t1z  599
    39  {z>=1.0 AND z<100}    t1z  600
-   40  {z>1.5 AND z<100}     t1z  300
+   40  {z>1.5 AND z<100}     t1z  299
    41  {z>=2.0 AND z<100}    t1z  300
-   42  {z>2.1 AND z<100}     t1z  100
-   43  {z>=3.0 AND z<100}    t1z  100
-   44  {z>3.2 AND z<100}     t1z   50
-   45  {z>=4.0 AND z<100}    t1z   50
-   46  {z>=-100 AND z<=-1.0} t1z   50
+   42  {z>2.1 AND z<100}     t1z  124
+   43  {z>=3.0 AND z<100}    t1z  125
+   44  {z>3.2 AND z<100}     t1z    1
+   45  {z>=4.0 AND z<100}    t1z    1
+   46  {z>=-100 AND z<=-1.0} t1z    1
    47  {z>=-100 AND z<=0.0}  t1z  400
-   48  {z>=-100 AND z<0.0}   t1z   50
+   48  {z>=-100 AND z<0.0}   t1z    1
    49  {z>=-100 AND z<=1.0}  t1z  700
    50  {z>=-100 AND z<2.0}   t1z  700
-   51  {z>=-100 AND z<=2.0}  t1z  900
-   52  {z>=-100 AND z<3.0}   t1z  900
+   51  {z>=-100 AND z<=2.0}  t1z  875
+   52  {z>=-100 AND z<3.0}   t1z  875
   
-  101  {z=-1}                t1z   50
+  101  {z=-1}                t1z    1
   102  {z=0}                 t1z  400
   103  {z=1}                 t1z  300
-  104  {z=2}                 t1z  200
-  105  {z=3}                 t1z  100
-  106  {z=4}                 t1z   50
-  107  {z=-10.0}             t1z   50
+  104  {z=2}                 t1z  175
+  105  {z=3}                 t1z  125
+  106  {z=4}                 t1z    1
+  107  {z=-10.0}             t1z    1
   108  {z=0.0}               t1z  400
   109  {z=1.0}               t1z  300
-  110  {z=2.0}               t1z  200
-  111  {z=3.0}               t1z  100
-  112  {z=4.0}               t1z   50
-  113  {z=1.5}               t1z   50
-  114  {z=2.5}               t1z   50
+  110  {z=2.0}               t1z  175
+  111  {z=3.0}               t1z  125
+  112  {z=4.0}               t1z    1
+  113  {z=1.5}               t1z    1
+  114  {z=2.5}               t1z    1
   
-  201  {z IN (-1)}           t1z   50
+  201  {z IN (-1)}           t1z    1
   202  {z IN (0)}            t1z  400
   203  {z IN (1)}            t1z  300
-  204  {z IN (2)}            t1z  200
-  205  {z IN (3)}            t1z  100
-  206  {z IN (4)}            t1z   50
-  207  {z IN (0.5)}          t1z   50
+  204  {z IN (2)}            t1z  175
+  205  {z IN (3)}            t1z  125
+  206  {z IN (4)}            t1z    1
+  207  {z IN (0.5)}          t1z    1
   208  {z IN (0,1)}          t1z  700
-  209  {z IN (0,1,2)}        t1z  900
+  209  {z IN (0,1,2)}        t1z  875
   210  {z IN (0,1,2,3)}      {}   100
   211  {z IN (0,1,2,3,4,5)}  {}   100
-  212  {z IN (1,2)}          t1z  500
+  212  {z IN (1,2)}          t1z  475
   213  {z IN (2,3)}          t1z  300
   214  {z=3 OR z=2}          t1z  300
-  215  {z IN (-1,3)}         t1z  150
-  216  {z=-1 OR z=3}         t1z  150
+  215  {z IN (-1,3)}         t1z  126
+  216  {z=-1 OR z=3}         t1z  126
 
-  300  {y=0}                 {}   100
-  301  {y=1}                 t1y   50
-  302  {y=0.1}               t1y   50
+  300  {y=0}                 t1y  974
+  301  {y=1}                 t1y   26
+  302  {y=0.1}               t1y    1
 
   400  {x IS NULL}           t1x  400
 
@@ -204,16 +192,17 @@ db eval {
 # Verify that range queries generate the correct row count estimates
 #
 foreach {testid where index rows} {
-  500  {x IS NULL AND u='charlie'}         t1u  20
-  501  {x=1 AND u='charlie'}               t1x   5
-  502  {x IS NULL}                          {} 100
-  503  {x=1}                               t1x  50
-  504  {x IS NOT NULL}                     t1x  25
+  500  {x IS NULL AND u='charlie'}         t1u  17
+  501  {x=1 AND u='charlie'}               t1x   1
+  502  {x IS NULL}                         t1x 995
+  503  {x=1}                               t1x   1
+  504  {x IS NOT NULL}                     t1x   2
   505  {+x IS NOT NULL}                     {} 500
   506  {upper(x) IS NOT NULL}               {} 500
 
 } {
   # Verify that the expected index is used with the expected row count
+if {$testid==50299} {breakpoint; set sqlite_where_trace 1}
   do_test analyze5-1.${testid}a {
     set x [lindex [eqp "SELECT * FROM t1 WHERE $where"] 3]
     set idx {}
@@ -221,6 +210,7 @@ foreach {testid where index rows} {
     regexp {~([0-9]+) rows} $x all nrow
     list $idx $nrow
   } [list $index $rows]
+if {$testid==50299} exit
 
   # Verify that the same result is achieved regardless of whether or not
   # the index is used
diff --git a/test/analyze6.test b/test/analyze6.test
index b090b5b0..74b7ec79 100644
--- a/test/analyze6.test
+++ b/test/analyze6.test
@@ -17,7 +17,7 @@
 set testdir [file dirname $argv0]
 source $testdir/tester.tcl
 
-ifcapable !stat2 {
+ifcapable !stat3 {
   finish_test
   return
 }
diff --git a/test/analyze7.test b/test/analyze7.test
index 4892a223..5bdb04d7 100644
--- a/test/analyze7.test
+++ b/test/analyze7.test
@@ -82,14 +82,14 @@ do_test analyze7-3.1 {
 do_test analyze7-3.2.1 {
   execsql {EXPLAIN QUERY PLAN SELECT * FROM t1 WHERE c=?;}
 } {0 0 0 {SEARCH TABLE t1 USING INDEX t1cd (c=?) (~86 rows)}}
-ifcapable stat2 {
-  # If ENABLE_STAT2 is defined, SQLite comes up with a different estimated
+ifcapable stat3 {
+  # If ENABLE_STAT3 is defined, SQLite comes up with a different estimated
   # row count for (c=2) than it does for (c=?).
   do_test analyze7-3.2.2 {
     execsql {EXPLAIN QUERY PLAN SELECT * FROM t1 WHERE c=2;}
-  } {0 0 0 {SEARCH TABLE t1 USING INDEX t1cd (c=?) (~51 rows)}}
+  } {0 0 0 {SEARCH TABLE t1 USING INDEX t1cd (c=?) (~57 rows)}}
 } else {
-  # If ENABLE_STAT2 is not defined, the expected row count for (c=2) is the
+  # If ENABLE_STAT3 is not defined, the expected row count for (c=2) is the
   # same as that for (c=?).
   do_test analyze7-3.2.3 {
     execsql {EXPLAIN QUERY PLAN SELECT * FROM t1 WHERE c=2;}
@@ -98,12 +98,14 @@ ifcapable stat2 {
 do_test analyze7-3.3 {
   execsql {EXPLAIN QUERY PLAN SELECT * FROM t1 WHERE a=123 AND b=123}
 } {0 0 0 {SEARCH TABLE t1 USING INDEX t1a (a=?) (~1 rows)}}
-do_test analyze7-3.4 {
-  execsql {EXPLAIN QUERY PLAN SELECT * FROM t1 WHERE c=123 AND b=123}
-} {0 0 0 {SEARCH TABLE t1 USING INDEX t1b (b=?) (~2 rows)}}
-do_test analyze7-3.5 {
-  execsql {EXPLAIN QUERY PLAN SELECT * FROM t1 WHERE a=123 AND c=123}
-} {0 0 0 {SEARCH TABLE t1 USING INDEX t1a (a=?) (~1 rows)}}
+ifcapable {!stat3} {
+  do_test analyze7-3.4 {
+    execsql {EXPLAIN QUERY PLAN SELECT * FROM t1 WHERE c=123 AND b=123}
+  } {0 0 0 {SEARCH TABLE t1 USING INDEX t1b (b=?) (~2 rows)}}
+  do_test analyze7-3.5 {
+    execsql {EXPLAIN QUERY PLAN SELECT * FROM t1 WHERE a=123 AND c=123}
+  } {0 0 0 {SEARCH TABLE t1 USING INDEX t1a (a=?) (~1 rows)}}
+}
 do_test analyze7-3.6 {
   execsql {EXPLAIN QUERY PLAN SELECT * FROM t1 WHERE c=123 AND d=123 AND b=123}
 } {0 0 0 {SEARCH TABLE t1 USING INDEX t1cd (c=? AND d=?) (~1 rows)}}
diff --git a/test/analyze8.test b/test/analyze8.test
new file mode 100644
index 00000000..f3e2710a
--- /dev/null
+++ b/test/analyze8.test
@@ -0,0 +1,103 @@
+# 2011 August 13
+#
+# The author disclaims copyright to this source code.  In place of
+# a legal notice, here is a blessing:
+#
+#    May you do good and not evil.
+#    May you find forgiveness for yourself and forgive others.
+#    May you share freely, never taking more than you give.
+#
+#***********************************************************************
+#
+# This file implements tests for SQLite library.  The focus of the tests
+# in this file is testing the capabilities of sqlite_stat3.
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+ifcapable !stat3 {
+  finish_test
+  return
+}
+
+set testprefix analyze8
+
+proc eqp {sql {db db}} {
+  uplevel execsql [list "EXPLAIN QUERY PLAN $sql"] $db
+}
+
+# Scenario:
+#
+#    Two indices.  One has mostly singleton entries, but for a few
+#    values there are hundreds of entries.  The other has 10-20
+#    entries per value.
+#
+# Verify that the query planner chooses the first index for the singleton
+# entries and the second index for the others.
+#
+do_test 1.0 {
+  db eval {
+    CREATE TABLE t1(a,b,c,d);
+    CREATE INDEX t1a ON t1(a);
+    CREATE INDEX t1b ON t1(b);
+    CREATE INDEX t1c ON t1(c);
+  }
+  for {set i 0} {$i<1000} {incr i} {
+    if {$i%2==0} {set a $i} {set a [expr {($i%8)*100}]}
+    set b [expr {$i/10}]
+    set c [expr {$i/8}]
+    set c [expr {$c*$c*$c}]
+    db eval {INSERT INTO t1 VALUES($a,$b,$c,$i)}
+  }
+  db eval {ANALYZE}
+} {}
+
+# The a==100 comparison is expensive because there are many rows
+# with a==100.  And so for those cases, choose the t1b index.
+#
+# Buf ro a==99 and a==101, there are far fewer rows so choose
+# the t1a index.
+#
+do_test 1.1 {
+  eqp {SELECT * FROM t1 WHERE a=100 AND b=55}
+} {0 0 0 {SEARCH TABLE t1 USING INDEX t1b (b=?) (~2 rows)}}
+do_test 1.2 {
+  eqp {SELECT * FROM t1 WHERE a=99 AND b=55}
+} {0 0 0 {SEARCH TABLE t1 USING INDEX t1a (a=?) (~1 rows)}}
+do_test 1.3 {
+  eqp {SELECT * FROM t1 WHERE a=101 AND b=55}
+} {0 0 0 {SEARCH TABLE t1 USING INDEX t1a (a=?) (~1 rows)}}
+do_test 1.4 {
+  eqp {SELECT * FROM t1 WHERE a=100 AND b=56}
+} {0 0 0 {SEARCH TABLE t1 USING INDEX t1b (b=?) (~2 rows)}}
+do_test 1.5 {
+  eqp {SELECT * FROM t1 WHERE a=99 AND b=56}
+} {0 0 0 {SEARCH TABLE t1 USING INDEX t1a (a=?) (~1 rows)}}
+do_test 1.6 {
+  eqp {SELECT * FROM t1 WHERE a=101 AND b=56}
+} {0 0 0 {SEARCH TABLE t1 USING INDEX t1a (a=?) (~1 rows)}}
+do_test 2.1 {
+  eqp {SELECT * FROM t1 WHERE a=100 AND b BETWEEN 50 AND 54}
+} {0 0 0 {SEARCH TABLE t1 USING INDEX t1b (b>? AND b<?) (~2 rows)}}
+
+# There are many more values of c between 0 and 100000 than there are
+# between 800000 and 900000.  So t1c is more selective for the latter
+# range.
+#
+do_test 3.1 {
+  eqp {SELECT * FROM t1 WHERE b BETWEEN 50 AND 54 AND c BETWEEN 0 AND 100000}
+} {0 0 0 {SEARCH TABLE t1 USING INDEX t1b (b>? AND b<?) (~6 rows)}}
+do_test 3.2 {
+  eqp {SELECT * FROM t1
+       WHERE b BETWEEN 50 AND 54 AND c BETWEEN 800000 AND 900000}
+} {0 0 0 {SEARCH TABLE t1 USING INDEX t1c (c>? AND c<?) (~4 rows)}}
+do_test 3.3 {
+  eqp {SELECT * FROM t1 WHERE a=100 AND c BETWEEN 0 AND 100000}
+} {0 0 0 {SEARCH TABLE t1 USING INDEX t1a (a=?) (~63 rows)}}
+do_test 3.4 {
+  eqp {SELECT * FROM t1
+       WHERE a=100 AND c BETWEEN 800000 AND 900000}
+} {0 0 0 {SEARCH TABLE t1 USING INDEX t1c (c>? AND c<?) (~2 rows)}}
+
+finish_test
diff --git a/test/async.test b/test/async.test
index f1d641da..e1bc0864 100644
--- a/test/async.test
+++ b/test/async.test
@@ -68,7 +68,7 @@ foreach testfile [lsort -dictionary [glob $testdir/*.test]] {
 
   # Make sure everything is flushed through. This is because [source]ing 
   # the next test file will delete the database file on disk (using
-  # [file delete]). If the asynchronous backend still has the file
+  # [delete_file]). If the asynchronous backend still has the file
   # open, it will become confused.
   #
   flush_async_queue
diff --git a/test/async2.test b/test/async2.test
index ec4ae308..7994a721 100644
--- a/test/async2.test
+++ b/test/async2.test
@@ -51,7 +51,7 @@ foreach err [list ioerr malloc-transient malloc-persistent] {
   for {set n 1} {$::go} {incr n} {
     set ::sqlite_io_error_pending 0
     sqlite3_memdebug_fail -1
-    file delete -force test.db test.db-journal
+    forcedelete test.db test.db-journal
     sqlite3 db test.db
     execsql $::setup_script
     db close
diff --git a/test/async3.test b/test/async3.test
index 77c4d55d..9336b660 100644
--- a/test/async3.test
+++ b/test/async3.test
@@ -41,8 +41,8 @@ set paths {
 
 do_test async3-1.0 {
   file mkdir [file join chocolate banana vanilla]
-  file delete -force chocolate/banana/vanilla/file.db
-  file delete -force chocolate/banana/vanilla/file.db-journal
+  forcedelete chocolate/banana/vanilla/file.db
+  forcedelete chocolate/banana/vanilla/file.db-journal
 } {}
 
 do_test async3-1.1 {
diff --git a/test/async5.test b/test/async5.test
index 5ea4c70e..aa484fcc 100644
--- a/test/async5.test
+++ b/test/async5.test
@@ -20,7 +20,7 @@ if {[info commands sqlite3async_initialize] eq ""} {
 }
 
 db close
-file delete -force test2.db
+forcedelete test2.db
 sqlite3async_initialize "" 1
 sqlite3async_control halt never
 sqlite3 db test.db
diff --git a/test/attach.test b/test/attach.test
index 1bb596cb..d57f5bfb 100644
--- a/test/attach.test
+++ b/test/attach.test
@@ -24,8 +24,8 @@ ifcapable !attach {
 }
 
 for {set i 2} {$i<=15} {incr i} {
-  file delete -force test$i.db
-  file delete -force test$i.db-journal
+  forcedelete test$i.db
+  forcedelete test$i.db-journal
 }
 
 do_test attach-1.1 {
@@ -628,7 +628,7 @@ do_test attach-5.1 {
   db close
   sqlite3 db test.db
   db2 close
-  file delete -force test2.db
+  forcedelete test2.db
   sqlite3 db2 test2.db
   catchsql {
     ATTACH DATABASE 'test.db' AS orig;
@@ -725,7 +725,7 @@ if {$tcl_platform(platform)=="unix"} {
     file attributes cannot-read -permission 0000
     if {[file writable cannot-read]} {
       puts "\n**** Tests do not work when run as root ****"
-      file delete -force cannot-read
+      forcedelete cannot-read
       exit 1
     }
     catchsql {
@@ -735,7 +735,7 @@ if {$tcl_platform(platform)=="unix"} {
   do_test attach-6.2.2 {
     db errorcode
   } {14}
-  file delete -force cannot-read
+  forcedelete cannot-read
 }
 
 # Check the error message if we try to access a database that has
@@ -749,12 +749,12 @@ for {set i 2} {$i<=15} {incr i} {
   catch {db$i close}
 }
 db close
-file delete -force test2.db
-file delete -force no-such-file
+forcedelete test2.db
+forcedelete no-such-file
 
 ifcapable subquery {
   do_test attach-7.1 {
-    file delete -force test.db test.db-journal
+    forcedelete test.db test.db-journal
     sqlite3 db test.db
     catchsql {
       DETACH RAISE ( IGNORE ) IN ( SELECT "AAAAAA" . * ORDER BY 
@@ -777,7 +777,7 @@ do_test attach-8.1 {
 do_test attach-8.2 {
   db errorcode
 } {26}
-file delete -force test2.db
+forcedelete test2.db
 do_test attach-8.3 {
   sqlite3 db2 test2.db
   db2 eval {CREATE TABLE t1(x); BEGIN EXCLUSIVE}
@@ -789,13 +789,13 @@ do_test attach-8.4 {
   db errorcode
 } {5}
 db2 close
-file delete -force test2.db
+forcedelete test2.db
 
 # Test that it is possible to attach the same database more than
 # once when not in shared-cache mode. That this is not possible in
 # shared-cache mode is tested in shared7.test.
 do_test attach-9.1 {
-  file delete -force test4.db
+  forcedelete test4.db
   execsql {
     ATTACH 'test4.db' AS aux1;
     CREATE TABLE aux1.t1(a, b);
diff --git a/test/attach2.test b/test/attach2.test
index 3cc5af96..db230723 100644
--- a/test/attach2.test
+++ b/test/attach2.test
@@ -33,8 +33,8 @@ do_test attach2-1.1 {
     CREATE TABLE t1(a,b);
     CREATE INDEX x1 ON t1(a);
   }
-  file delete -force test2.db
-  file delete -force test2.db-journal
+  forcedelete test2.db
+  forcedelete test2.db-journal
   sqlite3 db2 test2.db
   db2 eval {
     CREATE TABLE t1(a,b);
@@ -327,7 +327,7 @@ do_test attach2-4.15 {
 
 db close
 db2 close
-file delete -force test2.db
+forcedelete test2.db
 sqlite3_soft_heap_limit $soft_limit
 
 # These tests - attach2-5.* - check that the master journal file is deleted
@@ -335,7 +335,7 @@ sqlite3_soft_heap_limit $soft_limit
 #
 # Update: It's not actually created if a rollback occurs, so that test
 # doesn't really prove too much.
-foreach f [glob test.db*] {file delete -force $f}
+foreach f [glob test.db*] {forcedelete $f}
 do_test attach2-5.1 {
   sqlite3 db test.db
   execsql {
diff --git a/test/attach3.test b/test/attach3.test
index 36d39991..f8614253 100644
--- a/test/attach3.test
+++ b/test/attach3.test
@@ -35,8 +35,8 @@ execsql {
 }
 
 # Create tables t1 and t2 in database file test2.db
-file delete -force test2.db
-file delete -force test2.db-journal
+forcedelete test2.db
+forcedelete test2.db-journal
 sqlite3 db2 test2.db
 execsql {
   CREATE TABLE t1(a, b);
diff --git a/test/attach4.test b/test/attach4.test
index f597f5d0..77dd7e41 100644
--- a/test/attach4.test
+++ b/test/attach4.test
@@ -75,10 +75,12 @@ set L [list]
 set S ""
 foreach {name f} $files {
   if {[permutation] == "journaltest"} {
-    lappend L delete
+    set mode delete
   } else {
-    lappend L wal
+    set mode wal
   }
+  ifcapable !wal { set mode delete }
+  lappend L $mode
   append S "
     PRAGMA $name.journal_mode = WAL;
     UPDATE $name.tbl SET x = '$name';
diff --git a/test/attachmalloc.test b/test/attachmalloc.test
index c485c618..7fee1e1b 100644
--- a/test/attachmalloc.test
+++ b/test/attachmalloc.test
@@ -29,8 +29,8 @@ do_malloc_test attachmalloc-1 -tclprep {
   catch { db close }
   for {set i 2} {$i<=4} {incr i} {
     catch { db$i close }
-    file delete -force test$i.db
-    file delete -force test$i.db-journal
+    forcedelete test$i.db
+    forcedelete test$i.db-journal
   }
 } -tclbody {
   if {[catch {sqlite3 db test.db}]} {
@@ -48,8 +48,8 @@ do_malloc_test attachmalloc-1 -tclprep {
 }
 
 do_malloc_test attachmalloc-2 -tclprep {
-  file delete -force test2.db
-  file delete -force test2.db-journal
+  forcedelete test2.db
+  forcedelete test2.db-journal
   sqlite3 db2 test2.db
   db2 eval {
     CREATE TABLE t1(a, b, c);
diff --git a/test/auth.test b/test/auth.test
index 8d2159ec..211ae7e2 100644
--- a/test/auth.test
+++ b/test/auth.test
@@ -2321,10 +2321,10 @@ ifcapable compound&&subquery {
       }
     }
   }
-  ifcapable stat2 {
-    set stat2 "sqlite_stat2 "
+  ifcapable stat3 {
+    set stat3 "sqlite_stat3 "
   } else {
-    set stat2 ""
+    set stat3 ""
   }
   do_test auth-5.2 {
     execsql {
@@ -2333,7 +2333,7 @@ ifcapable compound&&subquery {
       WHERE type='table'
       ORDER BY name
     }
-  } "sqlite_stat1 ${stat2}t1 t2 t3 t4"
+  } "sqlite_stat1 ${stat3}t1 t2 t3 t4"
 }
 
 # Ticket #3944
diff --git a/test/autoinc.test b/test/autoinc.test
index 983b9b83..98f6919b 100644
--- a/test/autoinc.test
+++ b/test/autoinc.test
@@ -427,8 +427,8 @@ ifcapable tempdb {
 #
 ifcapable tempdb&&attach {
   do_test autoinc-5.1 {
-    file delete -force test2.db
-    file delete -force test2.db-journal
+    forcedelete test2.db
+    forcedelete test2.db-journal
     sqlite3 db2 test2.db
     execsql {
       CREATE TABLE t4(m INTEGER PRIMARY KEY AUTOINCREMENT, n);
@@ -520,7 +520,7 @@ do_test autoinc-7.2 {
 do_test autoinc-8.1 {
   catch {db2 close}
   catch {db close}
-  file delete -force test.db
+  forcedelete test.db
   sqlite3 db test.db
   set DB [sqlite3_connection_pointer db]
   set STMT [sqlite3_prepare $DB {
diff --git a/test/autoindex1.test b/test/autoindex1.test
index bc628dc2..6c8d54d1 100644
--- a/test/autoindex1.test
+++ b/test/autoindex1.test
@@ -248,4 +248,14 @@ do_execsql_test autoindex1-600 {
   0 1 1 {SEARCH SUBQUERY 1 AS y USING AUTOMATIC COVERING INDEX (sheep_no=?) (~8 rows)}
 }
 
+
+do_execsql_test autoindex1-700 {
+  CREATE TABLE t5(a, b, c);
+  EXPLAIN QUERY PLAN SELECT a FROM t5 WHERE b=10 ORDER BY c;
+} {
+  0 0 0 {SCAN TABLE t5 (~100000 rows)} 
+  0 0 0 {USE TEMP B-TREE FOR ORDER BY}
+}
+
+
 finish_test
diff --git a/test/autovacuum.test b/test/autovacuum.test
index 57dfd52d..1aef18f3 100644
--- a/test/autovacuum.test
+++ b/test/autovacuum.test
@@ -467,7 +467,7 @@ do_test autovacuum-3.3 {
 
 do_test autovacuum-3.4 {
   db close
-  file delete -force test.db
+  forcedelete test.db
   sqlite3 db test.db
   execsql {
     PRAGMA auto_vacuum;
@@ -502,7 +502,7 @@ do_test autovacuum-4.0 {
   # Reset everything just in case.
   #
   db close
-  file delete -force test.db test.db-journal
+  forcedelete test.db test.db-journal
   sqlite3 db test.db
   execsql {
     PRAGMA auto_vacuum = 1;
@@ -599,8 +599,8 @@ do_test autovacuum-6.1 {
 #
 do_test autovacuum-7.1 {
   db close
-  file delete -force test.db
-  file delete -force test.db-journal
+  forcedelete test.db
+  forcedelete test.db-journal
   sqlite3 db test.db
 
   execsql {
diff --git a/test/autovacuum_ioerr2.test b/test/autovacuum_ioerr2.test
index dadb29c0..891d00eb 100644
--- a/test/autovacuum_ioerr2.test
+++ b/test/autovacuum_ioerr2.test
@@ -75,7 +75,7 @@ do_ioerr_test autovacuum-ioerr2-3 -sqlprep {
   DROP TABLE abc2;
 }
 
-file delete -force backup.db
+forcedelete backup.db
 ifcapable subquery {
   do_ioerr_test autovacuum-ioerr2-4 -tclprep {
     if {![file exists backup.db]} {
@@ -99,9 +99,9 @@ ifcapable subquery {
       dbb close
     }
     db close
-    file delete -force test.db
-    file delete -force test.db-journal
-    copy_file backup.db test.db
+    forcedelete test.db
+    forcedelete test.db-journal
+    forcecopy backup.db test.db
     set ::DB [sqlite3 db test.db]
     execsql {
       PRAGMA cache_size = 10;
diff --git a/test/backcompat.test b/test/backcompat.test
index fa643f9b..e8e2f615 100644
--- a/test/backcompat.test
+++ b/test/backcompat.test
@@ -61,7 +61,7 @@ foreach bin $binaries {
 
 proc do_backcompat_test {rv bin1 bin2 script} {
 
-  file delete -force test.db
+  forcedelete test.db
 
   if {$bin1 != ""} { set ::bc_chan1 [launch_testfixture $bin1] }
   set ::bc_chan2 [launch_testfixture $bin2]
@@ -152,7 +152,7 @@ proc read_file_system {} {
 proc write_file_system {data} {
   foreach f {test.db test.db-journal test.db-wal} d $data { 
     if {[string length $d] == 0} {
-      file delete -force $f
+      forcedelete $f
     } else {
       write_file $f $d
     }
diff --git a/test/backup.test b/test/backup.test
index 0e2c26f3..62698857 100644
--- a/test/backup.test
+++ b/test/backup.test
@@ -73,7 +73,7 @@ test_contents backup-1.2 db main db main
 # Check that it is possible to create and finish backup operations.
 #
 do_test backup-1.3.1 {
-  file delete test2.db
+  delete_file test2.db
   sqlite3 db2 test2.db
   sqlite3_backup B db2 main db main
 } {B}
@@ -168,8 +168,8 @@ foreach pgsz_dest {512 1024 2048} {
 foreach nPagePerStep {1 200} {
 
   # Open the databases.
-  catch { file delete test.db }
-  catch { file delete test2.db }
+  catch { delete_file test.db }
+  catch { delete_file test2.db }
   eval $zOpenScript
 
   # Set to true if copying to an in-memory destination. Copying to an 
@@ -279,8 +279,8 @@ foreach nSrcPg {10 64 65 66 100} {
 foreach nDestRow {10 100} {
 foreach nDestPgsz {512 1024 2048 4096} {
 
-  catch { file delete test.db }
-  catch { file delete test2.db }
+  catch { delete_file test.db }
+  catch { delete_file test2.db }
   sqlite3 db test.db
   sqlite3 db2 test2.db
 
@@ -327,8 +327,8 @@ foreach nDestPgsz {512 1024 2048 4096} {
 
 #--------------------------------------------------------------------
 do_test backup-3.$iTest.1 {
-  catch { file delete -force test.db }
-  catch { file delete -force test2.db }
+  catch { forcedelete test.db }
+  catch { forcedelete test2.db }
   sqlite3 db test.db
   set iTab 1
 
@@ -392,8 +392,8 @@ do_test backup-4.1.4 {
 } {unknown database aux}
 
 do_test backup-4.2.1 {
-  catch { file delete -force test3.db }
-  catch { file delete -force test4.db }
+  catch { forcedelete test3.db }
+  catch { forcedelete test4.db }
   execsql { 
     ATTACH 'test3.db' AS aux1;
     CREATE TABLE aux1.t1(a, b);
@@ -439,7 +439,7 @@ db close
 db2 close
 
 do_test backup-4.5.1 {
-  catch { file delete -force test.db }
+  catch { forcedelete test.db }
   sqlite3 db test.db
   sqlite3 db2 :memory:
   execsql {
@@ -491,12 +491,12 @@ db2 close
 #   3) Backing up memory-to-file. 
 #
 set iTest 0
-file delete -force bak.db-wal
+forcedelete bak.db-wal
 foreach {writer file} {db test.db db3 test.db db :memory:} {
   incr iTest
-  catch { file delete bak.db }
+  catch { delete_file bak.db }
   sqlite3 db2 bak.db
-  catch { file delete $file }
+  catch { delete_file $file }
   sqlite3 db $file
   sqlite3 db3 $file
 
@@ -597,9 +597,9 @@ foreach {writer file} {db test.db db3 test.db db :memory:} {
   catch {db close}
   catch {db2 close}
   catch {db3 close}
-  catch { file delete bak.db }
+  catch { delete_file bak.db }
   sqlite3 db2 bak.db
-  catch { file delete $file }
+  catch { delete_file $file }
   sqlite3 db $file
   sqlite3 db3 $file
   do_test backup-5.$iTest.5.1 {
@@ -644,8 +644,8 @@ foreach {writer file} {db test.db db3 test.db db :memory:} {
 # Test the sqlite3_backup_remaining() and backup_pagecount() APIs.
 #
 do_test backup-6.1 {
-  catch { file delete -force test.db }
-  catch { file delete -force test2.db }
+  catch { forcedelete test.db }
+  catch { forcedelete test2.db }
   sqlite3 db test.db
   sqlite3 db2 test2.db
   execsql {
@@ -701,8 +701,8 @@ catch {db2 close}
 # backup-7.3.*: Destination database is externally locked (return SQLITE_BUSY).
 #
 do_test backup-7.0 {
-  catch { file delete -force test.db }
-  catch { file delete -force test2.db }
+  catch { forcedelete test.db }
+  catch { forcedelete test2.db }
   sqlite3 db2 test2.db
   sqlite3 db test.db
   execsql {
@@ -754,7 +754,7 @@ integrity_check backup-7.3.6 db2
 do_test backup-7.3.1 {
   db2 close
   db3 close
-  file delete -force test2.db
+  forcedelete test2.db
   sqlite3 db2 test2.db
   sqlite3 db3 test2.db
 
@@ -783,8 +783,8 @@ catch { db3 close }
 # These tests reuse the database "test.db" left over from backup-7.*.
 #
 do_test backup-8.1 {
-  catch { file delete -force test2.db }
-  catch { file delete -force test3.db }
+  catch { forcedelete test2.db }
+  catch { forcedelete test3.db }
   sqlite3 db2 test2.db
   sqlite3 db3 test3.db
 
@@ -865,8 +865,8 @@ catch {db2 close}
 
 ifcapable memorymanage {
   db close
-  file delete -force test.db
-  file delete -force bak.db
+  forcedelete test.db
+  forcedelete bak.db
 
   sqlite3 db test.db
   sqlite3 db2 test.db
@@ -918,7 +918,7 @@ ifcapable memorymanage {
 #   10.2.*: If the db is a file, the backup is not restarted.
 #
 db close
-file delete -force test.db test.db-journal
+forcedelete test.db test.db-journal
 foreach {tn file rc} {
   1 test.db  SQLITE_DONE
   2 :memory: SQLITE_OK
@@ -948,7 +948,7 @@ foreach {tn file rc} {
   } {1}
 
   do_test backup-10.$tn.3 {
-    file delete -force bak.db bak.db-journal
+    forcedelete bak.db bak.db-journal
     sqlite3 db2 bak.db
     sqlite3_backup B db2 main db main
     B step 50
diff --git a/test/backup2.test b/test/backup2.test
index 749c460e..34924b02 100644
--- a/test/backup2.test
+++ b/test/backup2.test
@@ -61,7 +61,7 @@ set cksum [dbcksum db main]
 # is identical to the original.
 #
 do_test backup2-2 {
-  file delete -force bu1.db
+  forcedelete bu1.db
   db backup bu1.db
   sqlite3 db2 bu1.db
   dbcksum db2 main
@@ -72,7 +72,7 @@ do_test backup2-2 {
 #
 do_test backup2-3.1 {
   db close
-  file delete -force test.db test.db-journal
+  forcedelete test.db test.db-journal
   sqlite3 db test.db
   db2 eval {BEGIN EXCLUSIVE}
   set rc [catch {db restore bu1.db} res]
@@ -82,7 +82,7 @@ do_test backup2-3.1 {
 } {1 {restore failed: source database busy}}
 do_test backup2-3.2 {
   db close
-  file delete -force test.db test.db-journal
+  forcedelete test.db test.db-journal
   sqlite3 db test.db
   db restore bu1.db
   dbcksum db main
@@ -96,7 +96,7 @@ do_test backup2-4 {
 } $cksum
 do_test backup2-5 {
   db2 close
-  file delete -force bu1.db bu2.db
+  forcedelete bu1.db bu2.db
   db backup temp bu2.db
   sqlite3 db2 bu2.db
   dbcksum db2 main
@@ -127,7 +127,7 @@ do_test backup2-7 {
 # Try to backup database that does not exist
 #
 do_test backup2-8 {
-  file delete -force bu1.db
+  forcedelete bu1.db
   set rc [catch {db backup aux1 bu1.db} res]
   lappend rc $res
 } {1 {backup failed: unknown database aux1}}
@@ -143,7 +143,7 @@ do_test backup2-9 {
 #
 if {$tcl_platform(platform)=="windows"} {
   do_test backup2-10 {
-    file delete -force bu3.db
+    forcedelete bu3.db
     file mkdir bu3.db
     set rc [catch {db restore temp bu3.db} res]
     lappend rc $res
@@ -151,7 +151,7 @@ if {$tcl_platform(platform)=="windows"} {
 }
 if {$tcl_platform(platform)!="windows"} {
   do_test backup2-10 {
-    file delete -force bu3.db
+    forcedelete bu3.db
     file mkdir bu3.db
     set rc [catch {db restore temp bu3.db} res]
     lappend rc $res
@@ -172,7 +172,7 @@ do_test backup2-12 {
   lappend rc $res
 } {1 {restore failed: unknown database aux1}}
 do_test backup2-13 {
-  file delete -force bu4.db
+  forcedelete bu4.db
   set rc [catch {db restore bu4.db} res]
   lappend rc $res
 } {1 {cannot open source database: unable to open database file}}
@@ -184,6 +184,6 @@ do_test backup2-14 {
   lappend rc $res
 } {1 {wrong # args: should be "db restore ?DATABASE? FILENAME"}}
  
-file delete -force bu1.db bu2.db bu3.db bu4.db
+forcedelete bu1.db bu2.db bu3.db bu4.db
 
 finish_test
diff --git a/test/backup_ioerr.test b/test/backup_ioerr.test
index 3b5e95df..313cff3d 100644
--- a/test/backup_ioerr.test
+++ b/test/backup_ioerr.test
@@ -60,7 +60,7 @@ do_test backup_ioerr-1.2 {
 } {1}
 do_test backup_ioerr-1.3 {
   db close
-  file delete -force test.db
+  forcedelete test.db
 } {}
 
 # Turn off IO error simulation.
@@ -155,8 +155,8 @@ for {set iError 1} {$bStop == 0} {incr iError} {
 
   catch { ddb close }
   catch { sdb close }
-  catch { file delete -force test.db }
-  catch { file delete -force bak.db }
+  catch { forcedelete test.db }
+  catch { forcedelete bak.db }
 
   # Open the source and destination databases.
   sqlite3 sdb test.db
diff --git a/test/capi3.test b/test/capi3.test
index cc1461a7..cbba04cd 100644
--- a/test/capi3.test
+++ b/test/capi3.test
@@ -697,7 +697,7 @@ if {![sqlite3 -has-codec]} {
   # Now test that the library correctly handles bogus entries in the
   # sqlite_master table (schema corruption).
   do_test capi3-8.1 {
-    file delete -force test.db test.db-journal
+    forcedelete test.db test.db-journal
     sqlite3 db test.db
     execsql {
       CREATE TABLE t1(a);
@@ -722,7 +722,7 @@ if {![sqlite3 -has-codec]} {
     # Build a 5-field row record. The first field is a string 'table', and
     # subsequent fields are all NULL.
     db close
-    file delete -force test.db test.db-journal
+    forcedelete test.db test.db-journal
     sqlite3 db test.db
     execsql {
       CREATE TABLE t1(a);
@@ -739,8 +739,8 @@ if {![sqlite3 -has-codec]} {
   } {1 {malformed database schema (?)}}
   db close
 }
-file delete -force test.db
-file delete -force test.db-journal
+forcedelete test.db
+forcedelete test.db-journal
 
 
 # Test the english language string equivalents for sqlite error codes
diff --git a/test/capi3c.test b/test/capi3c.test
index af979438..c1d5510b 100644
--- a/test/capi3c.test
+++ b/test/capi3c.test
@@ -670,7 +670,7 @@ if {![sqlite3 -has-codec]} {
   # Now test that the library correctly handles bogus entries in the
   # sqlite_master table (schema corruption).
   do_test capi3c-8.1 {
-    file delete -force test.db test.db-journal
+    forcedelete test.db test.db-journal
     sqlite3 db test.db
     execsql {
       CREATE TABLE t1(a);
@@ -695,7 +695,7 @@ if {![sqlite3 -has-codec]} {
     # Build a 5-field row record. The first field is a string 'table', and
     # subsequent fields are all NULL.
     db close
-    file delete -force test.db test.db-journal
+    forcedelete test.db test.db-journal
     sqlite3 db test.db
     execsql {
       CREATE TABLE t1(a);
@@ -712,8 +712,8 @@ if {![sqlite3 -has-codec]} {
   } {1 {malformed database schema (?)}}
   db close
 }
-file delete -force test.db
-file delete -force test.db-journal
+forcedelete test.db
+forcedelete test.db-journal
 
 
 # Test the english language string equivalents for sqlite error codes
diff --git a/test/collate5.test b/test/collate5.test
index 2e4b89d5..e5bea7a5 100644
--- a/test/collate5.test
+++ b/test/collate5.test
@@ -57,17 +57,17 @@ do_test collate5-1.1 {
   execsql {
     SELECT DISTINCT a FROM collate5t1;
   }
-} {A B N}
+} {a b n}
 do_test collate5-1.2 {
   execsql {
     SELECT DISTINCT b FROM collate5t1;
   }
-} {{} Apple apple banana}
+} {apple Apple banana {}}
 do_test collate5-1.3 {
   execsql {
     SELECT DISTINCT a, b FROM collate5t1;
   }
-} {A Apple a apple B banana N {}}
+} {a apple A Apple b banana n {}}
 
 # Ticket #3376
 #
diff --git a/test/collate7.test b/test/collate7.test
index 22b67310..da97491e 100644
--- a/test/collate7.test
+++ b/test/collate7.test
@@ -44,7 +44,7 @@ do_test collate7-1.4 {
 } {2}
 
 do_test collate7-2.1 {
-  file delete -force test.db test.db-journal
+  forcedelete test.db test.db-journal
   sqlite3 db test.db
   sqlite3_create_collation_v2 db CASELESS caseless_cmp {incr ::caseless_del}
   execsql {
diff --git a/test/corrupt.test b/test/corrupt.test
index 719c19cc..09f3c5bd 100644
--- a/test/corrupt.test
+++ b/test/corrupt.test
@@ -15,7 +15,7 @@
 #
 # $Id: corrupt.test,v 1.12 2009/07/13 09:41:45 danielk1977 Exp $
 
-catch {file delete -force test.db test.db-journal test.bu}
+catch {forcedelete test.db test.db-journal test.bu}
 
 set testdir [file dirname $argv0]
 source $testdir/tester.tcl
@@ -51,22 +51,10 @@ do_test corrupt-1.1 {
 } {}
 integrity_check corrupt-1.2
 
-# Copy file $from into $to
-#
-proc copy_file {from to} {
-  set f [open $from]
-  fconfigure $f -translation binary
-  set t [open $to w]
-  fconfigure $t -translation binary
-  puts -nonewline $t [read $f [file size $from]]
-  close $t
-  close $f
-}
-
 # Setup for the tests.  Make a backup copy of the good database in test.bu.
 # Create a string of garbage data that is 256 bytes long.
 #
-copy_file test.db test.bu
+forcecopy test.db test.bu
 set fsize [file size test.db]
 set junk "abcdefghijklmnopqrstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
 while {[string length $junk]<256} {append junk $junk}
@@ -79,7 +67,7 @@ set junk [string range $junk 0 255]
 for {set i [expr {1*256}]} {$i<$fsize-256} {incr i 256} {
   set tn [expr {$i/256}]
   db close
-  copy_file test.bu test.db
+  forcecopy test.bu test.db
   set fd [open test.db r+]
   fconfigure $fd -translation binary
   seek $fd $i
@@ -132,7 +120,7 @@ for {set i [expr {1*256}]} {$i<$fsize-256} {incr i 256} {
 #
 do_test corrupt-3.1 {
   db close
-  copy_file test.bu test.db
+  forcecopy test.bu test.db
   sqlite3 db test.db
   list
 } {}
@@ -181,7 +169,7 @@ do_test corrupt-3.6 {
 
 do_test corrupt-4.1 {
   db close
-  file delete -force test.db test.db-journal
+  forcedelete test.db test.db-journal
   sqlite3 db test.db
   execsql {
     PRAGMA page_size = 1024;
@@ -213,7 +201,7 @@ do_test corrupt-4.2 {
 
 do_test corrupt-5.1 {
   db close
-  file delete -force test.db test.db-journal
+  forcedelete test.db test.db-journal
   sqlite3 db test.db
 
   execsql { PRAGMA page_size = 1024 }
@@ -236,7 +224,7 @@ do_test corrupt-5.2 {
 # running this testcase under valgrind revealed the problem.
 do_test corrupt-6.1 {
   db close
-  file delete -force test.db test.db-journal
+  forcedelete test.db test.db-journal
   sqlite3 db test.db
   execsql { 
     PRAGMA page_size = 1024; CREATE TABLE t1(x);
@@ -264,7 +252,7 @@ do_test corrupt-6.1 {
 
 ifcapable oversize_cell_check {
   db close
-  file delete -force test.db test.db-journal
+  forcedelete test.db test.db-journal
   sqlite3 db test.db
   execsql { 
     PRAGMA page_size = 1024; CREATE TABLE t1(x);
@@ -317,7 +305,7 @@ ifcapable oversize_cell_check {
 }
 
 db close
-file delete -force test.db test.db-journal
+forcedelete test.db test.db-journal
 do_test corrupt-8.1 {
   sqlite3 db test.db
   execsql {
@@ -335,7 +323,7 @@ do_test corrupt-8.1 {
 } {1 {database disk image is malformed}}
 
 db close
-file delete -force test.db test.db-journal
+forcedelete test.db test.db-journal
 do_test corrupt-8.2 {
   sqlite3 db test.db
   execsql {
diff --git a/test/corrupt2.test b/test/corrupt2.test
index bdbc0165..744a76ed 100644
--- a/test/corrupt2.test
+++ b/test/corrupt2.test
@@ -41,9 +41,9 @@ do_test corrupt2-1.1 {
 do_test corrupt2-1.2 {
 
   # Corrupt the 16 byte magic string at the start of the file
-  file delete -force corrupt.db
-  file delete -force corrupt.db-journal
-  copy_file test.db corrupt.db
+  forcedelete corrupt.db
+  forcedelete corrupt.db-journal
+  forcecopy test.db corrupt.db
   set f [open corrupt.db RDWR]
   seek $f 8 start
   puts $f blah
@@ -60,9 +60,9 @@ do_test corrupt2-1.3 {
   db2 close
 
   # Corrupt the page-size (bytes 16 and 17 of page 1).
-  file delete -force corrupt.db
-  file delete -force corrupt.db-journal
-  copy_file test.db corrupt.db
+  forcedelete corrupt.db
+  forcedelete corrupt.db-journal
+  forcecopy test.db corrupt.db
   set f [open corrupt.db RDWR]
   fconfigure $f -encoding binary
   seek $f 16 start
@@ -80,9 +80,9 @@ do_test corrupt2-1.4 {
   db2 close
 
   # Corrupt the free-block list on page 1.
-  file delete -force corrupt.db
-  file delete -force corrupt.db-journal
-  copy_file test.db corrupt.db
+  forcedelete corrupt.db
+  forcedelete corrupt.db-journal
+  forcecopy test.db corrupt.db
   set f [open corrupt.db RDWR]
   fconfigure $f -encoding binary
   seek $f 101 start
@@ -100,9 +100,9 @@ do_test corrupt2-1.5 {
   db2 close
 
   # Corrupt the free-block list on page 1.
-  file delete -force corrupt.db
-  file delete -force corrupt.db-journal
-  copy_file test.db corrupt.db
+  forcedelete corrupt.db
+  forcedelete corrupt.db-journal
+  forcecopy test.db corrupt.db
   set f [open corrupt.db RDWR]
   fconfigure $f -encoding binary
   seek $f 101 start
@@ -123,9 +123,9 @@ db2 close
 # Corrupt a database by having 2 indices of the same name:
 do_test corrupt2-2.1 {
 
-  file delete -force corrupt.db
-  file delete -force corrupt.db-journal
-  copy_file test.db corrupt.db
+  forcedelete corrupt.db
+  forcedelete corrupt.db-journal
+  forcecopy test.db corrupt.db
 
   sqlite3 db2 corrupt.db 
   execsql "
@@ -150,8 +150,8 @@ do_test corrupt2-2.1 {
 db2 close
 
 do_test corrupt2-3.1 {
-  file delete -force corrupt.db
-  file delete -force corrupt.db-journal
+  forcedelete corrupt.db
+  forcedelete corrupt.db-journal
   sqlite3 db2 corrupt.db 
 
   execsql "
@@ -200,8 +200,8 @@ db2 close
 
 unset -nocomplain result
 do_test corrupt2-5.1 {
-  file delete -force corrupt.db
-  file delete -force corrupt.db-journal
+  forcedelete corrupt.db
+  forcedelete corrupt.db-journal
   sqlite3 db2 corrupt.db 
 
   execsql "
@@ -257,8 +257,8 @@ proc corruption_test {args} {
   array set A $args
 
   catch {db close}
-  file delete -force corrupt.db
-  file delete -force corrupt.db-journal
+  forcedelete corrupt.db
+  forcedelete corrupt.db-journal
 
   sqlite3 db corrupt.db 
   db eval $::presql
diff --git a/test/corrupt3.test b/test/corrupt3.test
index fba3ba79..a3827227 100644
--- a/test/corrupt3.test
+++ b/test/corrupt3.test
@@ -25,7 +25,7 @@ do_not_use_codec
 
 # We must have the page_size pragma for these tests to work.
 #
-ifcapable !pager_pragmas {
+ifcapable !pager_pragmas||direct_read {
   finish_test
   return
 }
diff --git a/test/corrupt9.test b/test/corrupt9.test
index f083cf24..f199452f 100644
--- a/test/corrupt9.test
+++ b/test/corrupt9.test
@@ -86,7 +86,7 @@ integrity_check corrupt9-1.2
 # Make sure the corruption is detected.
 #
 db close
-file copy -force test.db test.db-template
+forcecopy test.db test.db-template
 
 corrupt_freelist test.db 1
 sqlite3 db test.db
@@ -103,7 +103,7 @@ do_test corrupt9-2.2 {
 
 
 db close
-file copy -force test.db-template test.db
+forcecopy test.db-template test.db
 corrupt_freelist test.db 2
 sqlite3 db test.db
 do_test corrupt9-3.1 {
@@ -118,7 +118,7 @@ do_test corrupt9-3.2 {
 } {1 {database disk image is malformed}}
 
 db close
-file copy -force test.db-template test.db
+forcecopy test.db-template test.db
 corrupt_freelist test.db 3
 sqlite3 db test.db
 do_test corrupt9-4.1 {
diff --git a/test/corruptA.test b/test/corruptA.test
index 9c7d228f..8b76d3a2 100644
--- a/test/corruptA.test
+++ b/test/corruptA.test
@@ -40,12 +40,12 @@ integrity_check corruptA-1.2
 # is detected when opening the database file.
 #
 db close
-file copy -force test.db test.db-template
+forcecopy test.db test.db-template
 
 set unreadable_version 02
 ifcapable wal { set unreadable_version 03 }
 do_test corruptA-2.1 {
-  file copy -force test.db-template test.db
+  forcecopy test.db-template test.db
   hexio_write test.db 19 $unreadable_version   ;# the read format number
   sqlite3 db test.db
   catchsql {SELECT * FROM t1}  
@@ -53,7 +53,7 @@ do_test corruptA-2.1 {
  
 do_test corruptA-2.2 {
   db close
-  file copy -force test.db-template test.db
+  forcecopy test.db-template test.db
   hexio_write test.db 21 41   ;# max embedded payload fraction
   sqlite3 db test.db
   catchsql {SELECT * FROM t1}  
@@ -61,7 +61,7 @@ do_test corruptA-2.2 {
  
 do_test corruptA-2.3 {
   db close
-  file copy -force test.db-template test.db
+  forcecopy test.db-template test.db
   hexio_write test.db 22 1f   ;# min embedded payload fraction
   sqlite3 db test.db
   catchsql {SELECT * FROM t1}  
@@ -69,7 +69,7 @@ do_test corruptA-2.3 {
  
 do_test corruptA-2.4 {
   db close
-  file copy -force test.db-template test.db
+  forcecopy test.db-template test.db
   hexio_write test.db 23 21   ;# min leaf payload fraction
   sqlite3 db test.db
   catchsql {SELECT * FROM t1}  
diff --git a/test/corruptB.test b/test/corruptB.test
index 4aa1d010..0ff2d6e9 100644
--- a/test/corruptB.test
+++ b/test/corruptB.test
@@ -46,7 +46,7 @@ do_test corruptB-1.1 {
 } {1}
 integrity_check corruptB-1.2
 
-file copy -force test.db bak.db
+forcecopy test.db bak.db
 
 # Set the right-child of a B-Tree rootpage to refer to the root-page itself.
 #
@@ -65,7 +65,7 @@ do_test corruptB-1.3.2 {
 #
 do_test corruptB-1.4.1 {
   db close
-  file copy -force bak.db test.db
+  forcecopy bak.db test.db
   set cell_offset [hexio_get_int [hexio_read test.db [expr $offset+12] 2]]
   hexio_write test.db [expr $offset+$cell_offset] [hexio_render_int32 $::root]
 } {4}
@@ -78,7 +78,7 @@ do_test corruptB-1.4.2 {
 #
 do_test corruptB-1.5.1 {
   db close
-  file copy -force bak.db test.db
+  forcecopy bak.db test.db
   sqlite3 db test.db
   execsql {
     INSERT INTO t1 SELECT randomblob(200) FROM t1;
@@ -91,7 +91,7 @@ do_test corruptB-1.5.1 {
   }
 } {}
 
-file copy -force test.db bak.db
+forcecopy test.db bak.db
 
 # Set the right-child pointer of the right-child of the root page to point
 # back to the root page.
@@ -112,7 +112,7 @@ do_test corruptB-1.6.2 {
 #
 do_test corruptB-1.7.1 {
   db close
-  file copy -force bak.db test.db
+  forcecopy bak.db test.db
   set cell_offset [hexio_get_int [hexio_read test.db [expr $c_offset+12] 2]]
   hexio_write test.db [expr $c_offset+$cell_offset] [hexio_render_int32 $::root]
 } {4}
@@ -140,7 +140,7 @@ do_test corruptB-1.8.2 {
 #
 do_test corruptB-1.9.1 {
   db close
-  file copy -force bak.db test.db
+  forcecopy bak.db test.db
   set cell_offset [hexio_get_int [hexio_read test.db [expr $c_offset+12] 2]]
   hexio_write test.db [expr $c_offset+$cell_offset] [hexio_render_int32 $::root]
 } {4}
@@ -153,7 +153,7 @@ do_test corruptB-1.9.2 {
 
 do_test corruptB-2.1.1 {
   db close
-  file copy -force bak.db test.db
+  forcecopy bak.db test.db
   hexio_write test.db [expr $offset+8] [hexio_render_int32 0x6FFFFFFF]
 } {4}
 do_test corruptB-2.1.2 {
@@ -167,7 +167,7 @@ do_test corruptB-2.1.2 {
 #
 do_test corruptB-3.1.1 {
   db close
-  file copy -force bak.db test.db
+  forcecopy bak.db test.db
   sqlite3 db test.db
   set v [string repeat abcdefghij 200]
   execsql {
diff --git a/test/corruptC.test b/test/corruptC.test
index 05804263..34e81a1b 100644
--- a/test/corruptC.test
+++ b/test/corruptC.test
@@ -17,7 +17,7 @@
 #
 # $Id: corruptC.test,v 1.14 2009/07/11 06:55:34 danielk1977 Exp $
 
-catch {file delete -force test.db test.db-journal test.bu}
+catch {forcedelete test.db test.db-journal test.bu}
 
 set testdir [file dirname $argv0]
 source $testdir/tester.tcl
@@ -58,16 +58,10 @@ proc random {range} {
   return [expr {round(rand()*$range)}]
 }
 
-# Copy file $from into $to
-#
-proc copy_file {from to} {
-  file copy -force $from $to
-}
-
 # Setup for the tests.  Make a backup copy of the good database in test.bu.
 #
 db close
-copy_file test.db test.bu
+forcecopy test.db test.bu
 sqlite3 db test.db
 set fsize [file size test.db]
 
@@ -92,7 +86,7 @@ expr srand($qseed)
 # test that a corrupt content offset size is handled (seed 5577)
 do_test corruptC-2.1 {
   db close
-  copy_file test.bu test.db
+  forcecopy test.bu test.db
 
   # insert corrupt byte(s)
   hexio_write test.db 2053 [format %02x 0x04]
@@ -104,7 +98,7 @@ do_test corruptC-2.1 {
 # test that a corrupt content offset size is handled (seed 5649)
 do_test corruptC-2.2 {
   db close
-  copy_file test.bu test.db
+  forcecopy test.bu test.db
 
   # insert corrupt byte(s)
   hexio_write test.db 27   [format %02x 0x08]
@@ -125,7 +119,7 @@ do_test corruptC-2.2 {
 # test that a corrupt free cell size is handled (seed 13329)
 do_test corruptC-2.3 {
   db close
-  copy_file test.bu test.db
+  forcecopy test.bu test.db
 
   # insert corrupt byte(s)
   hexio_write test.db 1094 [format %02x 0x76]
@@ -137,7 +131,7 @@ do_test corruptC-2.3 {
 # test that a corrupt free cell size is handled (seed 169571)
 do_test corruptC-2.4 {
   db close
-  copy_file test.bu test.db
+  forcecopy test.bu test.db
 
   # insert corrupt byte(s)
   hexio_write test.db 3119 [format %02x 0xdf]
@@ -149,7 +143,7 @@ do_test corruptC-2.4 {
 # test that a corrupt free cell size is handled (seed 169571)
 do_test corruptC-2.5 {
   db close
-  copy_file test.bu test.db
+  forcecopy test.bu test.db
 
   # insert corrupt byte(s)
   hexio_write test.db 3119 [format %02x 0xdf]
@@ -169,7 +163,7 @@ Page 4: btreeInitPage() returns error code 11}}}
 # test that a corrupt free cell size is handled (seed 169595)
 do_test corruptC-2.6 {
   db close
-  copy_file test.bu test.db
+  forcecopy test.bu test.db
 
   # insert corrupt byte(s)
   hexio_write test.db 619 [format %02x 0xe2]
@@ -182,7 +176,7 @@ do_test corruptC-2.6 {
 # corruption (seed 178692)
 do_test corruptC-2.7 {
   db close
-  copy_file test.bu test.db
+  forcecopy test.bu test.db
 
   # insert corrupt byte(s)
   hexio_write test.db 3074 [format %02x 0xa0]
@@ -194,7 +188,7 @@ do_test corruptC-2.7 {
 # corruption (seed 179069)
 do_test corruptC-2.8 {
   db close
-  copy_file test.bu test.db
+  forcecopy test.bu test.db
 
   # insert corrupt byte(s)
   hexio_write test.db 1393 [format %02x 0x7d]
@@ -210,7 +204,7 @@ do_test corruptC-2.8 {
 # corruption (seed 170434)
 do_test corruptC-2.9 {
   db close
-  copy_file test.bu test.db
+  forcecopy test.bu test.db
 
   # insert corrupt byte(s)
   hexio_write test.db 2095 [format %02x 0xd6]
@@ -222,7 +216,7 @@ do_test corruptC-2.9 {
 # corruption (seed 186504)
 do_test corruptC-2.10 {
   db close
-  copy_file test.bu test.db
+  forcecopy test.bu test.db
 
   # insert corrupt byte(s)
   hexio_write test.db 3130 [format %02x 0x02]
@@ -234,7 +228,7 @@ do_test corruptC-2.10 {
 # corruption (seed 1589)
 do_test corruptC-2.11 {
   db close
-  copy_file test.bu test.db
+  forcecopy test.bu test.db
 
   # insert corrupt byte(s)
   hexio_write test.db 55 [format %02x 0xa7]
@@ -246,7 +240,7 @@ do_test corruptC-2.11 {
 # corruption (seed 14166)
 do_test corruptC-2.12 {
   db close
-  copy_file test.bu test.db
+  forcecopy test.bu test.db
 
   # insert corrupt byte(s)
   hexio_write test.db 974 [format %02x 0x2e]
@@ -258,7 +252,7 @@ do_test corruptC-2.12 {
 # corruption (seed 218803)
 do_test corruptC-2.13 {
   db close
-  copy_file test.bu test.db
+  forcecopy test.bu test.db
 
   # insert corrupt byte(s)
   hexio_write test.db 102 [format %02x 0x12]
@@ -269,7 +263,7 @@ do_test corruptC-2.13 {
 
 do_test corruptC-2.14 {
   db close
-  copy_file test.bu test.db
+  forcecopy test.bu test.db
 
   sqlite3 db test.db
   set blob [string repeat abcdefghij 10000]
@@ -286,7 +280,7 @@ do_test corruptC-2.14 {
 #
 do_test corruptC-2.15 {
   db close
-  copy_file test.bu test.db
+  forcecopy test.bu test.db
   hexio_write test.db 986 b9
   sqlite3 db test.db
   catchsql {SELECT count(*) FROM sqlite_master;}
@@ -300,7 +294,7 @@ for {set tn 0} {$tn<$fsize} {incr tn 1} {
 
   # setup for test
   db close
-  copy_file test.bu test.db
+  forcecopy test.bu test.db
   sqlite3 db test.db
 
   # Seek to a random location in the file, and write a random single byte
diff --git a/test/corruptD.test b/test/corruptD.test
index 61dada65..393d41ee 100644
--- a/test/corruptD.test
+++ b/test/corruptD.test
@@ -85,7 +85,7 @@ do_test corruptD-1.0 {
     DELETE FROM t1 WHERE a = 30;
     DELETE FROM t1 WHERE a = 40;
   }
-  copy_file test.db test.bu
+  forcecopy test.db test.bu
 } {}
 
 proc incr_change_counter {} {
@@ -96,7 +96,7 @@ proc incr_change_counter {} {
 
 proc restore_file {} {
   db close
-  copy_file test.bu test.db
+  forcecopy test.bu test.db
   sqlite3 db test.db
 }
 
diff --git a/test/corruptE.test b/test/corruptE.test
index a47adba1..507721d8 100644
--- a/test/corruptE.test
+++ b/test/corruptE.test
@@ -16,8 +16,6 @@
 #
 # $Id: corruptE.test,v 1.14 2009/07/11 06:55:34 danielk1977 Exp $
 
-catch {file delete -force test.db test.db-journal test.bu}
-
 set testdir [file dirname $argv0]
 source $testdir/tester.tcl
 
@@ -60,23 +58,17 @@ ifcapable {integrityck} {
   integrity_check corruptE-1.2
 }
 
-# Copy file $from into $to
-#
-proc copy_file {from to} {
-  file copy -force $from $to
-}
-
 # Setup for the tests.  Make a backup copy of the good database in test.bu.
 #
 db close
-copy_file test.db test.bu
+forcecopy test.db test.bu
 sqlite3 db test.db
 set fsize [file size test.db]
 
 
 do_test corruptE-2.1 {
   db close
-  copy_file test.bu test.db
+  forcecopy test.bu test.db
 
   # insert corrupt byte(s)
   hexio_write test.db 2041 [format %02x 0x2e]
@@ -92,7 +84,7 @@ do_test corruptE-2.1 {
 
 do_test corruptE-2.2 {
   db close
-  copy_file test.bu test.db
+  forcecopy test.bu test.db
 
   # insert corrupt byte(s)
   hexio_write test.db 2047 [format %02x 0x84]
@@ -108,7 +100,7 @@ do_test corruptE-2.2 {
 
 do_test corruptE-2.3 {
   db close
-  copy_file test.bu test.db
+  forcecopy test.bu test.db
 
   # insert corrupt byte(s)
   hexio_write test.db 7420 [format %02x 0xa8]
@@ -124,7 +116,7 @@ do_test corruptE-2.3 {
 
 do_test corruptE-2.4 {
   db close
-  copy_file test.bu test.db
+  forcecopy test.bu test.db
 
   # insert corrupt byte(s)
   hexio_write test.db 10233 [format %02x 0xd0]
@@ -165,7 +157,7 @@ set tc 1
 foreach test $tests {
   do_test corruptE-3.$tc {
     db close
-    copy_file test.bu test.db
+    forcecopy test.bu test.db
 
     # insert corrupt byte(s)
     hexio_write test.db [lindex $test 0] [format %02x [lindex $test 1]]
diff --git a/test/crash.test b/test/crash.test
index 42f41a36..f644dcaf 100644
--- a/test/crash.test
+++ b/test/crash.test
@@ -215,8 +215,8 @@ for {set i 1} {$i < $repeats} {incr i} {
 #
 ifcapable attach {
   do_test crash-4.0 {
-    file delete -force test2.db
-    file delete -force test2.db-journal
+    forcedelete test2.db
+    forcedelete test2.db-journal
     execsql {
       ATTACH 'test2.db' AS aux;
       PRAGMA aux.default_cache_size = 10;
@@ -318,7 +318,7 @@ ifcapable attach {
 # in test crash-5.3 for details.
 #
 db close
-file delete -force test.db
+forcedelete test.db
 sqlite3 db test.db
 do_test crash-5.1 {
   execsql {
diff --git a/test/crash3.test b/test/crash3.test
index 9b7a6784..7958af99 100644
--- a/test/crash3.test
+++ b/test/crash3.test
@@ -73,7 +73,7 @@ foreach {sql res2} [list \
   for {set ii 0} {$ii < 10} {incr ii} {
 
     db close
-    file delete -force test.db test.db-journal
+    forcedelete test.db test.db-journal
     sqlite3 db test.db
     do_test crash3-1.$tn.1 {
       execsql {
@@ -106,7 +106,7 @@ foreach {sql res2} [list \
 # This block tests both the IOCAP_SEQUENTIAL and IOCAP_SAFE_APPEND flags.
 #
 db close
-file delete -force test.db test.db-journal
+forcedelete test.db test.db-journal
 sqlite3 db test.db
 do_test crash3-2.0 {
   execsql {
@@ -177,7 +177,7 @@ foreach {::crashfile ::delay ::char} {
 #
 for {set ii 0} {$ii < 10} {incr ii} {
   db close
-  file delete -force test.db test.db-journal
+  forcedelete test.db test.db-journal
   crashsql -file test.db -char {sequential atomic} {
     CREATE TABLE abc(a, b, c);
   }
diff --git a/test/crash4.test b/test/crash4.test
index 839299b5..f68caecd 100644
--- a/test/crash4.test
+++ b/test/crash4.test
@@ -63,7 +63,7 @@ foreach cmd $sql_cmd_list {
 #
 for {set cnt 1; set fin 0} {!$fin} {incr cnt} {
   db close
-  file delete -force test.db test.db-journal
+  forcedelete test.db test.db-journal
   do_test crash4-1.$cnt.1 {
     set seed [expr {int(abs(rand()*10000))}]
     set delay [expr {int($cnt/50)+1}]
diff --git a/test/crash5.test b/test/crash5.test
index e8faa01b..42248d71 100644
--- a/test/crash5.test
+++ b/test/crash5.test
@@ -34,7 +34,7 @@ for {set ii 0} {$ii < 10} {incr ii} {
     # Set up the database so that it is an auto-vacuum database 
     # containing a single table (root page 3) with a single row. 
     # The row has an overflow page (page 4).
-    file delete -force test.db test.db-journal
+    forcedelete test.db test.db-journal
     sqlite3 db test.db
     set c [string repeat 3 1500]
     db eval {
diff --git a/test/crash6.test b/test/crash6.test
index d5ee439f..69c19464 100644
--- a/test/crash6.test
+++ b/test/crash6.test
@@ -23,7 +23,7 @@ ifcapable !crashtest {
 
 for {set ii 0} {$ii < 10} {incr ii} {
   catch {db close}
-  file delete -force test.db test.db-journal
+  forcedelete test.db test.db-journal
   crashsql -delay 2 -file test.db {
     PRAGMA auto_vacuum=OFF;
     PRAGMA page_size=4096;
@@ -40,7 +40,7 @@ for {set ii 0} {$ii < 10} {incr ii} {
 
 for {set ii 0} {$ii < 10} {incr ii} {
   catch {db close}
-  file delete -force test.db test.db-journal
+  forcedelete test.db test.db-journal
   sqlite3 db test.db
   execsql {
     PRAGMA auto_vacuum=OFF;
@@ -66,7 +66,7 @@ proc signature {} {
 #
 for {set ii 0} {$ii < 30} {incr ii} {
   db close
-  file delete -force test.db
+  forcedelete test.db
   sqlite3 db test.db
 
   set pagesize [expr 1024 << ($ii % 4)]
diff --git a/test/crash7.test b/test/crash7.test
index fc0596a8..4554a2ac 100644
--- a/test/crash7.test
+++ b/test/crash7.test
@@ -26,7 +26,7 @@ proc signature {} {
 foreach f [list test.db test.db-journal] {
   for {set ii 1} {$ii < 64} {incr ii} {
     db close
-    file delete test.db
+    delete_file test.db
     sqlite3 db test.db
   
     set from_size [expr 1024 << ($ii&3)]
diff --git a/test/crash8.test b/test/crash8.test
index 6424a1ab..8bc25865 100644
--- a/test/crash8.test
+++ b/test/crash8.test
@@ -243,7 +243,7 @@ do_test crash8-3.11 {
 #
 ifcapable pragma {
   reset_db
-  file delete -force test2.db
+  forcedelete test2.db
 
   do_test crash8-4.1 {
     execsql {
@@ -336,14 +336,14 @@ ifcapable pragma {
   } {def}
 
   do_test crash8-4.10 {
-    file delete $zMasterJournal
+    delete_file $zMasterJournal
     execsql { SELECT b FROM main.ab WHERE a = 0 }
   } {jkl}
 }
 
 for {set i 1} {$i < 10} {incr i} {
   catch { db close }
-  file delete -force test.db test.db-journal
+  forcedelete test.db test.db-journal
   sqlite3 db test.db
   do_test crash8-5.$i.1 {
     execsql {
@@ -367,7 +367,7 @@ for {set i 1} {$i < 10} {incr i} {
   } {ok}
   
   catch { db close }
-  file delete -force test.db test.db-journal
+  forcedelete test.db test.db-journal
   sqlite3 db test.db
   do_test crash8-5.$i.2 {
     execsql {
@@ -383,9 +383,9 @@ for {set i 1} {$i < 10} {incr i} {
       BEGIN;
         UPDATE t1 SET x = randomblob(900);
     }
-    file delete -force testX.db testX.db-journal testX.db-wal
-    copy_file test.db testX.db
-    copy_file test.db-journal testX.db-journal
+    forcedelete testX.db testX.db-journal testX.db-wal
+    forcecopy test.db testX.db
+    forcecopy test.db-journal testX.db-journal
     db close
 
     crashsql -file test.db -delay [expr ($::i%2) + 1] {
diff --git a/test/createtab.test b/test/createtab.test
index 3f036b76..01e0b612 100644
--- a/test/createtab.test
+++ b/test/createtab.test
@@ -27,7 +27,7 @@ ifcapable autovacuum {
 #
 for {set av 0} {$av<=$upperBound} {incr av} {
   db close
-  file delete -force test.db test.db-journal
+  forcedelete test.db test.db-journal
   sqlite3 db test.db
 
   # Create a table that spans multiple pages.  It is important
diff --git a/test/dbstatus.test b/test/dbstatus.test
index 202f34a0..e1c8f3eb 100644
--- a/test/dbstatus.test
+++ b/test/dbstatus.test
@@ -56,6 +56,12 @@ proc lookaside {db} {
   }
 }
 
+ifcapable stat3 {
+  set STAT3 1
+} else {
+  set STAT3 0
+}
+
 #---------------------------------------------------------------------------
 # Run the dbstatus-2 and dbstatus-3 tests with several of different
 # lookaside buffer sizes.
@@ -118,7 +124,7 @@ foreach ::lookaside_buffer_size {0 64 120} {
       CREATE TABLE t2(c, d);
       CREATE VIEW v1 AS SELECT * FROM t1 UNION SELECT * FROM t2;
     }
-    6 {
+    6y {
       CREATE TABLE t1(a, b);
       CREATE INDEX i1 ON t1(a);
       CREATE INDEX i2 ON t1(a,b);
@@ -155,7 +161,7 @@ foreach ::lookaside_buffer_size {0 64 120} {
   
     # Step 1.
     db close
-    file delete -force test.db
+    forcedelete test.db
     sqlite3 db test.db
     sqlite3_db_config_lookaside db 0 $::lookaside_buffer_size 500
     db cache size 0
@@ -198,7 +204,11 @@ foreach ::lookaside_buffer_size {0 64 120} {
     # much greater than just that reported by DBSTATUS_SCHEMA_USED in this
     # case.
     #
-    if {[string match *x $tn] || $AUTOVACUUM} {
+    # Some of the memory used for sqlite_stat3 is unaccounted for by
+    # dbstatus.
+    #
+    if {[string match *x $tn] || $AUTOVACUUM
+         || ([string match *y $tn] && $STAT3)} {
       do_test dbstatus-2.$tn.ax { expr {($nSchema1-$nSchema2)<=$nFree} } 1
     } else {
       do_test dbstatus-2.$tn.a { expr {$nSchema1-$nSchema2} } $nFree
@@ -287,7 +297,7 @@ foreach ::lookaside_buffer_size {0 64 120} {
 
     # Step 1.
     db close
-    file delete -force test.db
+    forcedelete test.db
     sqlite3 db test.db
     sqlite3_db_config_lookaside db 0 $::lookaside_buffer_size 500
     db cache size 1000
diff --git a/test/dbstatus2.test b/test/dbstatus2.test
new file mode 100644
index 00000000..4dfa9b8e
--- /dev/null
+++ b/test/dbstatus2.test
@@ -0,0 +1,76 @@
+# 2011 September 20
+#
+# The author disclaims copyright to this source code.  In place of
+# a legal notice, here is a blessing:
+#
+#    May you do good and not evil.
+#    May you find forgiveness for yourself and forgive others.
+#    May you share freely, never taking more than you give.
+#
+#***********************************************************************
+#
+# Tests for the sqlite3_stmt_status() function
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+set ::testprefix dbstatus2
+
+do_execsql_test 1.0 {
+  PRAGMA page_size = 1024;
+  PRAGMA auto_vacuum = 0;
+
+  CREATE TABLE t1(a PRIMARY KEY, b);
+  INSERT INTO t1 VALUES(1, randomblob(600));
+  INSERT INTO t1 VALUES(2, randomblob(600));
+  INSERT INTO t1 VALUES(3, randomblob(600));
+}
+
+proc db_hit_miss {db {reset 0}} {
+  set nHit  [sqlite3_db_status $db CACHE_HIT $reset]
+  set nMiss [sqlite3_db_status $db CACHE_MISS $reset]
+  list $nHit $nMiss
+}
+
+do_test 1.1 {
+  db close
+  sqlite3 db test.db
+  expr {[file size test.db] / 1024}
+} 6
+
+do_test 1.2 {
+  execsql { SELECT b FROM t1 WHERE a=2 }
+  db_hit_miss db
+} {{0 2 0} {0 4 0}}
+
+do_test 1.3 { 
+  execsql { SELECT b FROM t1 WHERE a=2 }
+  db_hit_miss db
+} {{0 6 0} {0 4 0}}
+
+do_test 1.4 { 
+  execsql { SELECT b FROM t1 WHERE a=2 }
+  db_hit_miss db
+} {{0 10 0} {0 4 0}}
+
+do_test 1.5 { 
+  db_hit_miss db 1
+} {{0 10 0} {0 4 0}}
+
+do_test 1.6 { 
+  db_hit_miss db 0
+} {{0 0 0} {0 0 0}}
+
+do_test 1.7 {
+  set fd [db incrblob main t1 b 1]
+  fconfigure $fd -translation binary
+  set len [string length [read $fd]]
+  close $fd
+  set len
+} 600
+do_test 1.8 { sqlite3_db_status db CACHE_HIT  0 } {0 2 0}
+do_test 1.9 { sqlite3_db_status db CACHE_MISS 0 } {0 1 0}
+
+ 
+finish_test
diff --git a/test/delete.test b/test/delete.test
index 61e979ef..47d35781 100644
--- a/test/delete.test
+++ b/test/delete.test
@@ -275,7 +275,7 @@ do_test delete-8.0 {
   }
 } {123}
 db close
-catch {file delete -force test.db-journal}
+catch {forcedelete test.db-journal}
 catch {file attributes test.db -permissions 0444}
 catch {file attributes test.db -readonly 1}
 sqlite3 db test.db
@@ -312,12 +312,12 @@ do_test delete-8.6 {
 integrity_check delete-8.7
 
 # Need to do the following for tcl 8.5 on mac. On that configuration, the
-# -readonly flag is taken so seriously that a subsequent [file delete -force]
+# -readonly flag is taken so seriously that a subsequent [forcedelete]
 # (required before the next test file can be executed) will fail.
 #
 catch {file attributes test.db -readonly 0}
 db close
-file delete -force test.db test.db-journal
+forcedelete test.db test.db-journal
 
 # The following tests verify that SQLite correctly handles the case
 # where an index B-Tree is being scanned, the rowid column being read
diff --git a/test/descidx1.test b/test/descidx1.test
index 1154dc56..c7fab340 100644
--- a/test/descidx1.test
+++ b/test/descidx1.test
@@ -297,14 +297,14 @@ do_test descidx1-5.9 {
 ifcapable legacyformat {
   do_test descidx1-6.1 {
     db close
-    file delete -force test.db test.db-journal
+    forcedelete test.db test.db-journal
     sqlite3 db test.db
     execsql {PRAGMA legacy_file_format}
   } {1}
 } else {
   do_test descidx1-6.1 {
     db close
-    file delete -force test.db test.db-journal
+    forcedelete test.db test.db-journal
     sqlite3 db test.db
     execsql {PRAGMA legacy_file_format}
   } {0}
@@ -328,7 +328,7 @@ ifcapable vacuum {
 }
 do_test descidx1-6.4 {
   db close
-  file delete -force test.db test.db-journal
+  forcedelete test.db test.db-journal
   sqlite3 db test.db
   execsql {PRAGMA legacy_file_format=NO}
   execsql {PRAGMA legacy_file_format}
diff --git a/test/diskfull.test b/test/diskfull.test
index a71db91e..391dfb4f 100644
--- a/test/diskfull.test
+++ b/test/diskfull.test
@@ -82,8 +82,8 @@ proc do_diskfull_test {prefix sql} {
 do_diskfull_test diskfull-2 VACUUM
 
 # db close
-# file delete -force test.db
-# file delete -force test.db-journal
+# forcedelete test.db
+# forcedelete test.db-journal
 # sqlite3 db test.db
 # 
 # do_test diskfull-3.1 {
diff --git a/test/distinct.test b/test/distinct.test
new file mode 100644
index 00000000..e0a91360
--- /dev/null
+++ b/test/distinct.test
@@ -0,0 +1,166 @@
+# 2011 July 1
+#
+# The author disclaims copyright to this source code.  In place of
+# a legal notice, here is a blessing:
+#
+#    May you do good and not evil.
+#    May you find forgiveness for yourself and forgive others.
+#    May you share freely, never taking more than you give.
+#
+#***********************************************************************
+# This file implements regression tests for SQLite library.  The
+# focus of this script is the DISTINCT modifier.
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+set testprefix distinct
+
+
+proc is_distinct_noop {sql} {
+  set sql1 $sql
+  set sql2 [string map {DISTINCT ""} $sql]
+
+  set program1 [list]
+  set program2 [list]
+  db eval "EXPLAIN $sql1" {
+    if {$opcode != "Noop"} { lappend program1 $opcode }
+  }
+  db eval "EXPLAIN $sql2" {
+    if {$opcode != "Noop"} { lappend program2 $opcode }
+  }
+
+  return [expr {$program1==$program2}]
+}
+
+proc do_distinct_noop_test {tn sql} {
+  uplevel [list do_test $tn [list is_distinct_noop $sql] 1]
+}
+proc do_distinct_not_noop_test {tn sql} {
+  uplevel [list do_test $tn [list is_distinct_noop $sql] 0]
+}
+
+proc do_temptables_test {tn sql temptables} {
+  uplevel [list do_test $tn [subst -novar {
+    set ret ""
+    db eval "EXPLAIN [set sql]" {
+      if {$opcode == "OpenEphemeral" || $opcode == "SorterOpen"} { 
+        if {$p5 != "10" && $p5!="00"} { error "p5 = $p5" }
+        if {$p5 == "10"} {
+          lappend ret hash
+        } else {
+          lappend ret btree
+        }
+      }
+    }
+    set ret
+  }] $temptables]
+}
+
+
+#-------------------------------------------------------------------------
+# The following tests - distinct-1.* - check that the planner correctly 
+# detects cases where a UNIQUE index means that a DISTINCT clause is 
+# redundant. Currently the planner only detects such cases when there
+# is a single table in the FROM clause.
+#
+do_execsql_test 1.0 {
+  CREATE TABLE t1(a, b, c, d);
+  CREATE UNIQUE INDEX i1 ON t1(b, c);
+  CREATE UNIQUE INDEX i2 ON t1(d COLLATE nocase);
+
+  CREATE TABLE t2(x INTEGER PRIMARY KEY, y);
+
+  CREATE TABLE t3(c1 PRIMARY KEY, c2);
+  CREATE INDEX i3 ON t3(c2);
+}
+foreach {tn noop sql} {
+
+  1   1   "SELECT DISTINCT b, c FROM t1"
+  2   1   "SELECT DISTINCT c FROM t1 WHERE b = ?"
+  3   1   "SELECT DISTINCT rowid FROM t1"
+  4   1   "SELECT DISTINCT rowid, a FROM t1"
+  5   1   "SELECT DISTINCT x FROM t2"
+  6   1   "SELECT DISTINCT * FROM t2"
+  7   1   "SELECT DISTINCT * FROM (SELECT * FROM t2)"
+
+  8   1   "SELECT DISTINCT * FROM t1"
+
+  8   0   "SELECT DISTINCT a, b FROM t1"
+
+  9   0   "SELECT DISTINCT c FROM t1 WHERE b IN (1,2)"
+  10  0   "SELECT DISTINCT c FROM t1"
+  11  0   "SELECT DISTINCT b FROM t1"
+
+  12  0   "SELECT DISTINCT a, d FROM t1"
+  13  0   "SELECT DISTINCT a, b, c COLLATE nocase FROM t1"
+  14  1   "SELECT DISTINCT a, d COLLATE nocase FROM t1"
+  15  0   "SELECT DISTINCT a, d COLLATE binary FROM t1"
+  16  1   "SELECT DISTINCT a, b, c COLLATE binary FROM t1"
+
+  16  0   "SELECT DISTINCT t1.rowid FROM t1, t2"
+  17  0   { /* Technically, it would be possible to detect that DISTINCT
+            ** is a no-op in cases like the following. But SQLite does not
+            ** do so. */
+            SELECT DISTINCT t1.rowid FROM t1, t2 WHERE t1.rowid=t2.rowid }
+
+  18  1   "SELECT DISTINCT c1, c2 FROM t3"
+  19  1   "SELECT DISTINCT c1 FROM t3"
+  20  1   "SELECT DISTINCT * FROM t3"
+  21  0   "SELECT DISTINCT c2 FROM t3"
+
+  22  0   "SELECT DISTINCT * FROM (SELECT 1, 2, 3 UNION SELECT 4, 5, 6)"
+  23  1   "SELECT DISTINCT rowid FROM (SELECT 1, 2, 3 UNION SELECT 4, 5, 6)"
+
+  24  0   "SELECT DISTINCT rowid/2 FROM t1"
+  25  1   "SELECT DISTINCT rowid/2, rowid FROM t1"
+  26  1   "SELECT DISTINCT rowid/2, b FROM t1 WHERE c = ?"
+} {
+  if {$noop} {
+    do_distinct_noop_test 1.$tn $sql
+  } else {
+    do_distinct_not_noop_test 1.$tn $sql
+  }
+}
+
+#-------------------------------------------------------------------------
+# The following tests - distinct-2.* - test cases where an index is
+# used to deliver results in order of the DISTINCT expressions. 
+#
+drop_all_tables
+do_execsql_test 2.0 {
+  CREATE TABLE t1(a, b, c);
+
+  CREATE INDEX i1 ON t1(a, b);
+  CREATE INDEX i2 ON t1(b COLLATE nocase, c COLLATE nocase);
+
+  INSERT INTO t1 VALUES('a', 'b', 'c');
+  INSERT INTO t1 VALUES('A', 'B', 'C');
+  INSERT INTO t1 VALUES('a', 'b', 'c');
+  INSERT INTO t1 VALUES('A', 'B', 'C');
+}
+
+foreach {tn sql temptables res} {
+  1   "a, b FROM t1"                                       {}      {A B a b}
+  2   "b, a FROM t1"                                       {}      {B A b a}
+  3   "a, b, c FROM t1"                                    {hash}  {a b c A B C}
+  4   "a, b, c FROM t1 ORDER BY a, b, c"                   {btree} {A B C a b c}
+  5   "b FROM t1 WHERE a = 'a'"                            {}      {b}
+  6   "b FROM t1"                                          {hash}  {b B}
+  7   "a FROM t1"                                          {}      {A a}
+  8   "b COLLATE nocase FROM t1"                           {}      {b}
+  9   "b COLLATE nocase FROM t1 ORDER BY b COLLATE nocase" {}      {B}
+} {
+  do_execsql_test    2.$tn.1 "SELECT DISTINCT $sql" $res
+  do_temptables_test 2.$tn.2 "SELECT DISTINCT $sql" $temptables
+}
+
+do_execsql_test 2.A {
+  SELECT (SELECT DISTINCT o.a FROM t1 AS i) FROM t1 AS o;
+} {a A a A}
+
+
+
+
+finish_test
diff --git a/test/e_expr.test b/test/e_expr.test
index b61b42da..3c9678c3 100644
--- a/test/e_expr.test
+++ b/test/e_expr.test
@@ -657,7 +657,7 @@ set sqlite_current_time 0
 
 # EVIDENCE-OF: R-57598-59332 -- syntax diagram expr
 #
-file delete -force test.db2
+forcedelete test.db2
 execsql {
   ATTACH 'test.db2' AS dbname;
   CREATE TABLE dbname.tblname(cname);
@@ -1675,7 +1675,7 @@ db3 close
 # Test statements related to the EXISTS and NOT EXISTS operators.
 #
 catch { db close }
-file delete -force test.db
+forcedelete test.db
 sqlite3 db test.db
 
 do_execsql_test e_expr-34.1 {
@@ -1756,7 +1756,7 @@ foreach {tn e1 e2} {
 #
 
 catch { db close }
-file delete -force test.db
+forcedelete test.db
 sqlite3 db test.db
 do_test e_expr-35.0 {
   execsql {
diff --git a/test/e_fts3.test b/test/e_fts3.test
index 3f7ed0e5..2a580ca3 100644
--- a/test/e_fts3.test
+++ b/test/e_fts3.test
@@ -60,7 +60,7 @@ foreach {DO_MALLOC_TEST enc} {
 # [foreach] loop is testing with OOM errors, disable the lookaside buffer.
 #
 db close
-file delete -force test.db test.db-journal
+forcedelete test.db test.db-journal
 sqlite3 db test.db
 if {$DO_MALLOC_TEST} { sqlite3_db_config_lookaside db 0 0 0 }
 db eval "PRAGMA encoding = '$enc'"
@@ -637,7 +637,7 @@ read_test 8.2.2 { PRAGMA table_info(t9c) } {0 c\"1 {} 0 {} 0 1 c'2 {} 0 {} 0}
 #
 foreach DO_MALLOC_TEST {0 1 2} {
   db close
-  file delete -force test.db test.db-journal
+  forcedelete test.db test.db-journal
   sqlite3 db test.db
   if {$DO_MALLOC_TEST} { sqlite3_db_config_lookaside db 0 0 0 }
 
diff --git a/test/e_select.test b/test/e_select.test
index 6194872f..e0f5f0fb 100644
--- a/test/e_select.test
+++ b/test/e_select.test
@@ -1238,8 +1238,8 @@ do_select_tests e_select-5 {
   3.1 "SELECT x FROM h2" {One Two Three Four one two three four}
   3.2 "SELECT x FROM h1, h2 ON (x=b)" {One one Four four}
 
-  4.1 "SELECT DISTINCT x FROM h2" {four one three two}
-  4.2 "SELECT DISTINCT x FROM h1, h2 ON (x=b)" {four one}
+  4.1 "SELECT DISTINCT x FROM h2" {One Two Three Four}
+  4.2 "SELECT DISTINCT x FROM h1, h2 ON (x=b)" {One Four}
 } 
 
 # EVIDENCE-OF: R-02054-15343 For the purposes of detecting duplicate
@@ -1253,11 +1253,11 @@ do_select_tests e_select-5.5 {
 # sequence to compare text values with apply.
 #
 do_select_tests e_select-5.6 {
-  1  "SELECT DISTINCT b FROM h1"                  {I IV four i iv one}
-  2  "SELECT DISTINCT b COLLATE nocase FROM h1"   {four i iv one}
-  3  "SELECT DISTINCT x FROM h2"                  {four one three two}
+  1  "SELECT DISTINCT b FROM h1"                  {one I i four IV iv}
+  2  "SELECT DISTINCT b COLLATE nocase FROM h1"   {one I four IV}
+  3  "SELECT DISTINCT x FROM h2"                  {One Two Three Four}
   4  "SELECT DISTINCT x COLLATE binary FROM h2"   {
-    Four One Three Two four one three two
+    One Two Three Four one two three four
   }
 }
 
diff --git a/test/enc2.test b/test/enc2.test
index ce25bf39..415bc0f7 100644
--- a/test/enc2.test
+++ b/test/enc2.test
@@ -142,7 +142,7 @@ set encodings [list UTF-8 UTF-16le UTF-16be]
 set sqlite_os_trace 0
 set i 1
 foreach enc $encodings {
-  file delete -force test.db
+  forcedelete test.db
   sqlite3 db test.db
   db eval "PRAGMA encoding = \"$enc\""
   execsql $dbcontents
@@ -172,13 +172,13 @@ foreach enc $encodings {
 # encoding to the main database.
 ifcapable attach {
   do_test enc2-4.1 {
-    file delete -force test.db
+    forcedelete test.db
     sqlite3 db test.db
     db eval "PRAGMA encoding = 'UTF-8'"
     db eval "CREATE TABLE abc(a, b, c);"
   } {}
   do_test enc2-4.2 {
-    file delete -force test2.db
+    forcedelete test2.db
     sqlite3 db2 test2.db
     db2 eval "PRAGMA encoding = 'UTF-16'"
     db2 eval "CREATE TABLE abc(a, b, c);"
@@ -206,7 +206,7 @@ proc test_collate {enc lhs rhs} {
   return $res
 }
 
-file delete -force test.db
+forcedelete test.db
 sqlite3 db test.db; set DB [sqlite3_connection_pointer db]
 do_test enc2-5.0 {
   execsql {
@@ -235,7 +235,7 @@ do_test enc2-5.3 {
 } {one two three four five UTF-16BE}
 
 db close
-file delete -force test.db
+forcedelete test.db
 sqlite3 db test.db; set DB [sqlite3_connection_pointer db]
 execsql {pragma encoding = 'UTF-16LE'}
 do_test enc2-5.4 {
@@ -265,7 +265,7 @@ do_test enc2-5.7 {
 } {one two three four five UTF-8}
 
 db close
-file delete -force test.db
+forcedelete test.db
 sqlite3 db test.db; set DB [sqlite3_connection_pointer db]
 execsql {pragma encoding = 'UTF-16BE'}
 do_test enc2-5.8 {
@@ -311,7 +311,7 @@ do_test enc2-5.14 {
 } test_collate
 
 db close
-file delete -force test.db
+forcedelete test.db
 
 do_test enc2-5.15 {
   sqlite3 db test.db; set ::DB [sqlite3_connection_pointer db]
@@ -333,7 +333,7 @@ proc test_function {enc arg} {
 }
 
 db close
-file delete -force test.db
+forcedelete test.db
 sqlite3 db test.db; set DB [sqlite3_connection_pointer db]
 execsql {pragma encoding = 'UTF-8'}
 do_test enc2-6.0 {
@@ -366,7 +366,7 @@ do_test enc2-6.3 {
 } {{UTF-16BE sqlite}}
 
 db close
-file delete -force test.db
+forcedelete test.db
 sqlite3 db test.db; set DB [sqlite3_connection_pointer db]
 execsql {pragma encoding = 'UTF-16LE'}
 do_test enc2-6.3 {
@@ -399,7 +399,7 @@ do_test enc2-6.6 {
 } {{UTF-16BE sqlite}}
 
 db close
-file delete -force test.db
+forcedelete test.db
 sqlite3 db test.db; set DB [sqlite3_connection_pointer db]
 execsql {pragma encoding = 'UTF-16BE'}
 do_test enc2-6.7 {
@@ -433,7 +433,7 @@ do_test enc2-6.10 {
 
 
 db close
-file delete -force test.db
+forcedelete test.db
 
 # The following tests - enc2-7.* - function as follows:
 #
@@ -493,7 +493,7 @@ ifcapable {complete} {
 
 # Test that the encoding of an empty database may still be set after the
 # (empty) schema has been initialized.
-file delete -force test.db
+forcedelete test.db
 do_test enc2-9.1 {
   sqlite3 db test.db
   execsql {
@@ -537,7 +537,7 @@ do_test enc2-9.5 {
 #
 do_test enc2-10.1 {
   db close
-  file delete -force test.db test.db-journal
+  forcedelete test.db test.db-journal
   sqlite3 db test.db
   db eval {
     PRAGMA encoding=UTF16;
diff --git a/test/enc3.test b/test/enc3.test
index 44b21793..1d8a2581 100644
--- a/test/enc3.test
+++ b/test/enc3.test
@@ -81,7 +81,7 @@ ifcapable {bloblit && utf16} {
 #
 ifcapable {utf16 && shared_cache} {
   db close
-  file delete -force test8.db test8.db-journal
+  forcedelete test8.db test8.db-journal
   set ::enable_shared_cache [sqlite3_enable_shared_cache 1]
   sqlite3 dbaux test8.db
   sqlite3 db test.db
@@ -100,7 +100,7 @@ ifcapable {utf16 && shared_cache} {
     } dbaux
   } {1 {attached databases must use the same text encoding as main database}}
   dbaux close
-  file delete -force test8.db test8.db-journal
+  forcedelete test8.db test8.db-journal
   sqlite3_enable_shared_cache $::enable_shared_cache
 }
 
diff --git a/test/enc4.test b/test/enc4.test
index 7de6e849..94869b6f 100644
--- a/test/enc4.test
+++ b/test/enc4.test
@@ -43,7 +43,7 @@ set vals [list\
 set i 1
 foreach enc $encodings {
 
-  file delete -force test.db
+  forcedelete test.db
   sqlite3 db test.db
   db eval "PRAGMA encoding = \"$enc\""
 
@@ -93,7 +93,7 @@ foreach enc $encodings {
   incr i
 }
 
-file delete -force test.db
+forcedelete test.db
 sqlite3 db test.db
 
 do_test enc4-4.1 {
diff --git a/test/errmsg.test b/test/errmsg.test
new file mode 100644
index 00000000..9f8409b1
--- /dev/null
+++ b/test/errmsg.test
@@ -0,0 +1,116 @@
+# 2001 September 15
+#
+# The author disclaims copyright to this source code.  In place of
+# a legal notice, here is a blessing:
+#
+#    May you do good and not evil.
+#    May you find forgiveness for yourself and forgive others.
+#    May you share freely, never taking more than you give.
+#
+#***********************************************************************
+# Test that if sqlite3_prepare_v2() is used to prepare a query, the
+# error-message associated with an sqlite3_step() error is available
+# immediately. Whereas if sqlite3_prepare() is used, it is not available
+# until sqlite3_finalize() or sqlite3_reset() has been called.
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+set testprefix errmsg
+
+# Test organization:
+#
+#   errmsg-1.*         User-defined SQL function errors
+#   errmsg-2.*         Errors generated by the VDBE (constraint failures etc.)
+#   errmsg-3.*         SQLITE_SCHEMA and statement recompilation errors.
+#
+
+proc error_messages_worker {prepare sql schema} {
+  set ret [list]
+
+  set stmt [$prepare db $sql -1 dummy]
+  execsql $schema
+  lappend ret [sqlite3_step $stmt]
+  lappend ret [sqlite3_errmsg db]
+  lappend ret [sqlite3_finalize $stmt]
+  lappend ret [sqlite3_errmsg db]
+
+  set ret
+}
+
+proc error_messages_v2 {sql {schema {}}} {
+  error_messages_worker sqlite3_prepare_v2 $sql $schema
+}
+
+proc error_messages {sql {schema {}}} {
+  error_messages_worker sqlite3_prepare $sql $schema
+}
+
+proc sql_error {msg} { error $msg }
+db func sql_error sql_error
+
+#-------------------------------------------------------------------------
+# Test error messages returned by user-defined SQL functions.
+#
+do_test 1.1 {
+  error_messages "SELECT sql_error('custom message')"
+} [list {*}{
+    SQLITE_ERROR {SQL logic error or missing database} 
+    SQLITE_ERROR {custom message}
+}]
+do_test 1.2 {
+  error_messages_v2 "SELECT sql_error('custom message')"
+} [list {*}{
+    SQLITE_ERROR {custom message}
+    SQLITE_ERROR {custom message}
+}]
+
+#-------------------------------------------------------------------------
+# Test error messages generated directly by VDBE code (e.g. constraint
+# failures).
+#
+do_execsql_test 2.1 {
+  CREATE TABLE t1(a PRIMARY KEY, b UNIQUE);
+  INSERT INTO t1 VALUES('abc', 'def');
+}
+do_test 2.2 {
+  error_messages "INSERT INTO t1 VALUES('ghi', 'def')"
+} [list {*}{
+    SQLITE_ERROR      {SQL logic error or missing database} 
+    SQLITE_CONSTRAINT {column b is not unique}
+}]
+do_test 2.3 {
+  error_messages_v2 "INSERT INTO t1 VALUES('ghi', 'def')"
+} [list {*}{
+    SQLITE_CONSTRAINT {column b is not unique}
+    SQLITE_CONSTRAINT {column b is not unique}
+}]
+
+#-------------------------------------------------------------------------
+# Test SQLITE_SCHEMA errors. And, for _v2(), test that if the schema
+# change invalidates the SQL statement itself the error message is returned
+# correctly.
+#
+do_execsql_test 3.1.1 {
+  CREATE TABLE t2(a PRIMARY KEY, b UNIQUE);
+  INSERT INTO t2 VALUES('abc', 'def');
+}
+do_test 3.1.2 {
+  error_messages "SELECT a FROM t2" "DROP TABLE t2"
+} [list {*}{
+    SQLITE_ERROR {SQL logic error or missing database} 
+    SQLITE_SCHEMA {database schema has changed}
+}]
+do_execsql_test 3.2.1 {
+  CREATE TABLE t2(a PRIMARY KEY, b UNIQUE);
+  INSERT INTO t2 VALUES('abc', 'def');
+}
+do_test 3.2.2 {
+  error_messages_v2 "SELECT a FROM t2" "DROP TABLE t2"
+} [list {*}{
+    SQLITE_ERROR {no such table: t2} 
+    SQLITE_ERROR {no such table: t2}
+}]
+
+finish_test
diff --git a/test/exclusive.test b/test/exclusive.test
index db79d303..ffde8915 100644
--- a/test/exclusive.test
+++ b/test/exclusive.test
@@ -22,12 +22,12 @@ ifcapable {!pager_pragmas} {
   return
 }
 
-file delete -force test2.db-journal
-file delete -force test2.db
-file delete -force test3.db-journal
-file delete -force test3.db
-file delete -force test4.db-journal
-file delete -force test4.db
+forcedelete test2.db-journal
+forcedelete test2.db
+forcedelete test3.db-journal
+forcedelete test3.db
+forcedelete test4.db-journal
+forcedelete test4.db
 
 #----------------------------------------------------------------------
 # Test cases exclusive-1.X test the PRAGMA logic.
@@ -481,8 +481,8 @@ do_execsql_test exclusive-6.1 {
 }
 do_test exclusive-6.2 {
   forcedelete test2.db test2.db-journal
-  file copy test.db test2.db
-  file copy test.db-journal test2.db-journal
+  copy_file test.db test2.db
+  copy_file test.db-journal test2.db-journal
   sqlite3 db test2.db
 } {}
 
diff --git a/test/exclusive2.test b/test/exclusive2.test
index 18f304db..2208da51 100644
--- a/test/exclusive2.test
+++ b/test/exclusive2.test
@@ -259,8 +259,8 @@ do_test exclusive2-2.8 {
 
 db close
 catch {close $::fd}
-file delete -force test.db
-file delete -force test.db-journal
+forcedelete test.db
+forcedelete test.db-journal
 
 do_test exclusive2-3.0 {
   sqlite3 db test.db
diff --git a/test/exists.test b/test/exists.test
index c7c14a24..fb73797d 100644
--- a/test/exists.test
+++ b/test/exists.test
@@ -159,7 +159,7 @@ foreach jm {rollback wal} {
       sql1 { DROP INDEX IF EXISTS i2 }
       sql2 { CREATE INDEX aux.i2 ON t2(x) }
       sql1 { DROP INDEX IF EXISTS i2 }
-      sql2 { SELECT name FROM aux.sqlite_master WHERE type = 'index' }
+      sql2 { SELECT * FROM aux.sqlite_master WHERE type = 'index' }
     } {}
 
     # VIEW objects.
diff --git a/test/fallocate.test b/test/fallocate.test
index 05aa2a81..8a5fa323 100644
--- a/test/fallocate.test
+++ b/test/fallocate.test
@@ -79,7 +79,7 @@ ifcapable !wal { set skipwaltests 1 }
 
 if {!$skipwaltests} {
   db close
-  file delete -force test.db
+  forcedelete test.db
   sqlite3 db test.db
   file_control_chunksize_test db main [expr 32*1024]
   
diff --git a/test/filectrl.test b/test/filectrl.test
index 67e81830..9f077d52 100644
--- a/test/filectrl.test
+++ b/test/filectrl.test
@@ -37,5 +37,5 @@ do_test filectrl-1.5 {
   file_control_lockproxy_test db [pwd]
 } {}
 db close
-file delete -force .test_control_lockproxy.db-conch test.proxy
+forcedelete .test_control_lockproxy.db-conch test.proxy
 finish_test
diff --git a/test/filefmt.test b/test/filefmt.test
index 72edbeeb..1165cd62 100644
--- a/test/filefmt.test
+++ b/test/filefmt.test
@@ -23,7 +23,7 @@ source $testdir/tester.tcl
 do_not_use_codec
 
 db close
-file delete -force test.db test.db-journal
+forcedelete test.db test.db-journal
 
 # Database begins with valid 16-byte header string.
 #
@@ -63,7 +63,7 @@ ifcapable pager_pragmas {
           && $pagesize>$SQLITE_MAX_PAGE_SIZE} continue
      do_test filefmt-1.5.$pagesize.1 {
        db close
-       file delete -force test.db
+       forcedelete test.db
        sqlite3 db test.db
        db eval "PRAGMA auto_vacuum=OFF"
        db eval "PRAGMA page_size=$pagesize"
@@ -105,7 +105,7 @@ do_test filefmt-1.7 {
 ifcapable pager_pragmas {
   do_test filefmt-1.8 {
     db close
-    file delete -force test.db
+    forcedelete test.db
     sqlite3 db test.db
     db eval {PRAGMA page_size=512; CREATE TABLE t1(x)}
     db close
@@ -125,7 +125,7 @@ ifcapable pager_pragmas {
 # always derives this from the size of the file.
 #
 db close
-file delete -force test.db
+forcedelete test.db
 
 set a_string_counter 1
 proc a_string {n} {
@@ -157,7 +157,7 @@ integrity_check filefmt-2.1.5
 do_test         filefmt-2.1.6 { hexio_read test.db 28 4 } {00000010}
 
 db close
-file delete -force test.db
+forcedelete test.db
 sqlite3 db test.db
 db func a_string a_string
 
diff --git a/test/fkey_malloc.test b/test/fkey_malloc.test
index 05a2a4f4..4a36f5f3 100644
--- a/test/fkey_malloc.test
+++ b/test/fkey_malloc.test
@@ -68,7 +68,7 @@ proc catch_fk_error {zSql} {
   if {[string match {*foreign key*} $msg]} {
     return ""
   }
-  if {$msg eq "out of memory"} {
+  if {$msg eq "out of memory" || $msg eq "constraint failed"} {
     error 1
   }
   error $msg
diff --git a/test/fts-9fd058691.test b/test/fts-9fd058691.test
new file mode 100644
index 00000000..b228482d
--- /dev/null
+++ b/test/fts-9fd058691.test
@@ -0,0 +1,59 @@
+# 2011 October 13
+#
+#    May you do good and not evil.
+#    May you find forgiveness for yourself and forgive others.
+#    May you share freely, never taking more than you give.
+#
+#***********************************************************************
+#
+# This file implements regression tests for the FTS SQLite module.
+#
+# This file implements tests to verify that ticket [9fd058691] has been
+# fixed.  
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+# If SQLITE_ENABLE_FTS3 is defined, omit this file.
+ifcapable !fts3 {
+  finish_test
+  return
+}
+
+set ::testprefix fts3-9fd058691
+
+do_execsql_test 1.0 {
+  CREATE VIRTUAL TABLE fts USING fts3( tags TEXT);
+  INSERT INTO fts (tags) VALUES ('tag1');
+  SELECT * FROM fts WHERE tags MATCH 'tag1';
+} {tag1}
+
+do_test 1.1 {
+  db close
+  sqlite3 db test.db
+  execsql {
+    UPDATE fts SET tags = 'tag1' WHERE rowid = 1;
+    SELECT * FROM fts WHERE tags MATCH 'tag1';
+  }
+} {tag1}
+
+db close
+forcedelete test.db
+sqlite3 db test.db
+
+do_execsql_test 2.0 {
+  CREATE VIRTUAL TABLE fts USING fts3(tags TEXT);
+  INSERT INTO fts (docid, tags) VALUES (1, 'tag1');
+  INSERT INTO fts (docid, tags) VALUES (2, NULL);
+  INSERT INTO fts (docid, tags) VALUES (3, 'three');
+} {}
+
+do_test 2.1 {
+  execsql {
+    UPDATE fts SET tags = 'two' WHERE rowid = 2;
+    SELECT * FROM fts WHERE tags MATCH 'two';
+  }
+} {two}
+
+finish_test
diff --git a/test/fts1j.test b/test/fts1j.test
index 5ff0d0ed..4dac22ab 100644
--- a/test/fts1j.test
+++ b/test/fts1j.test
@@ -19,8 +19,8 @@ ifcapable !fts1 {
 }
 
 # Clean up anything left over from a previous pass.
-file delete -force test2.db
-file delete -force test2.db-journal
+forcedelete test2.db
+forcedelete test2.db-journal
 sqlite3 db2 test2.db
 
 db eval {
@@ -84,6 +84,6 @@ do_test fts1j-1.3 {
 catch {db eval {DETACH DATABASE two}}
 
 catch {db2 close}
-file delete -force test2.db
+forcedelete test2.db
 
 finish_test
diff --git a/test/fts1o.test b/test/fts1o.test
index 92666c6f..61fd74ca 100644
--- a/test/fts1o.test
+++ b/test/fts1o.test
@@ -95,7 +95,7 @@ do_test fts1o-3.6 {
 # Test that it is possible to rename an fts1 table in an attached 
 # database.
 #
-file delete -force test2.db test2.db-journal
+forcedelete test2.db test2.db-journal
 
 do_test fts1o-4.1 {
   execsql {
diff --git a/test/fts2j.test b/test/fts2j.test
index b8a89b20..a8a2c07c 100644
--- a/test/fts2j.test
+++ b/test/fts2j.test
@@ -19,8 +19,8 @@ ifcapable !fts2 {
 }
 
 # Clean up anything left over from a previous pass.
-file delete -force test2.db
-file delete -force test2.db-journal
+forcedelete test2.db
+forcedelete test2.db-journal
 sqlite3 db2 test2.db
 
 db eval {
@@ -84,6 +84,6 @@ do_test fts2j-1.3 {
 catch {db eval {DETACH DATABASE two}}
 
 catch {db2 close}
-file delete -force test2.db
+forcedelete test2.db
 
 finish_test
diff --git a/test/fts2o.test b/test/fts2o.test
index 5a33c455..63e71b95 100644
--- a/test/fts2o.test
+++ b/test/fts2o.test
@@ -109,7 +109,7 @@ do_test fts2o-2.12 {
 # be run on an initially empty db.
 #
 db close
-file delete -force test.db test.db-journal
+forcedelete test.db test.db-journal
 sqlite3 db test.db
 
 do_test fts2o-3.1 {
@@ -134,7 +134,7 @@ do_test fts2o-3.2 {
 # Test that it is possible to rename an fts2 table in an attached 
 # database.
 #
-file delete -force test2.db test2.db-journal
+forcedelete test2.db test2.db-journal
 
 do_test fts2o-3.1 {
   execsql {
diff --git a/test/fts3aj.test b/test/fts3aj.test
index 60d26c02..f3d46f2a 100644
--- a/test/fts3aj.test
+++ b/test/fts3aj.test
@@ -19,8 +19,8 @@ ifcapable !fts3 {
 }
 
 # Clean up anything left over from a previous pass.
-file delete -force test2.db
-file delete -force test2.db-journal
+forcedelete test2.db
+forcedelete test2.db-journal
 sqlite3 db2 test2.db
 
 db eval {
@@ -84,6 +84,6 @@ do_test fts3aj-1.3 {
 catch {db eval {DETACH DATABASE two}}
 
 catch {db2 close}
-file delete -force test2.db
+forcedelete test2.db
 
 finish_test
diff --git a/test/fts3ao.test b/test/fts3ao.test
index cd9df01e..786667a7 100644
--- a/test/fts3ao.test
+++ b/test/fts3ao.test
@@ -111,7 +111,7 @@ do_test fts3ao-2.12 {
 # be run on an initially empty db.
 #
 db close
-file delete -force test.db test.db-journal
+forcedelete test.db test.db-journal
 sqlite3 db test.db
 
 do_test fts3ao-3.1 {
@@ -136,7 +136,7 @@ do_test fts3ao-3.2 {
 # Test that it is possible to rename an fts3 table in an attached 
 # database.
 #
-file delete -force test2.db test2.db-journal
+forcedelete test2.db test2.db-journal
 
 do_test fts3ao-3.1 {
   execsql {
@@ -200,6 +200,9 @@ do_test fts3ao-4.7 {
     SELECT * FROM t5;
   }
 } {{the quick brown fox} {jumped over the} {lazy dog}}
+do_execsql_test fts3ao-4.8 {
+  SELECT snippet(t5, '[', ']') FROM t5 WHERE t5 MATCH 'the'
+} {{[the] quick brown fox} {jumped over [the]}}
 
 # Test that it is possible to rename an FTS4 table. Renaming an FTS4 table
 # involves renaming the extra %_docsize and %_stat tables.
diff --git a/test/fts3auto.test b/test/fts3auto.test
index 484fd6ac..1c58a172 100644
--- a/test/fts3auto.test
+++ b/test/fts3auto.test
@@ -107,15 +107,17 @@ proc do_fts3query_test {tn args} {
   " $matchinfo_asc
 }
 
-#    fts3_make_deferrable TABLE TOKEN
+#    fts3_make_deferrable TABLE TOKEN ?NROW?
 #
-proc fts3_make_deferrable {tbl token} {
+proc fts3_make_deferrable {tbl token {nRow 0}} {
 
   set stmt [sqlite3_prepare db "SELECT * FROM $tbl" -1 dummy]
   set name [sqlite3_column_name $stmt 0]
   sqlite3_finalize $stmt
 
-  set nRow [db one "SELECT count(*) FROM $tbl"]
+  if {$nRow==0} {
+    set nRow [db one "SELECT count(*) FROM $tbl"]
+  }
   set pgsz [db one "PRAGMA page_size"]
   execsql BEGIN
   for {set i 0} {$i < ($nRow * $pgsz * 1.2)/100} {incr i} {
@@ -653,6 +655,50 @@ foreach {tn pending create} {
   catchsql { COMMIT }
 }
 
+foreach {tn create} {
+  1    "fts4(x)"
+  2    "fts4(x, order=DESC)"
+} {
+  execsql [subst {
+    DROP TABLE IF EXISTS t1;
+    CREATE VIRTUAL TABLE t1 USING $create;
+  }]
+
+  foreach {x} {
+    "F E N O T K X V A X I E X A P G Q V H U"
+    "R V A E T C V Q N I E L O N U G J K L U"
+    "U Y I G W M V F J L X I D C H F P J Q B"
+    "S G D Z X R P G S S Y B K A S G A I L L"
+    "L S I C H T Z S R Q P R N K J X L F M J"
+    "C C C D P X B Z C M A D A C X S B T X V"
+    "W Y J M D R G V R K B X S A W R I T N C"
+    "P K L W T M S P O Y Y V V O E H Q A I R"
+    "C D Y I C Z F H J C O Y A Q F L S B D K"
+    "P G S C Y C Y V I M B D S Z D D Y W I E"
+    "Z K Z U E E S F Y X T U A L W O U J C Q"
+    "P A T Z S W L P L Q V Y Y I P W U X S S"
+    "I U I H U O F Z F R H R F T N D X A G M"
+    "N A B M S H K X S O Y D T X S B R Y H Z"
+    "L U D A S K I L S V Z J P U B E B Y H M"
+  } {
+    execsql { INSERT INTO t1 VALUES($x) }
+  }
+
+  # Add extra documents to the database such that token "B" will be considered
+  # deferrable if considering the other tokens means that 2 or fewer documents
+  # will be loaded into memory.
+  #
+  fts3_make_deferrable t1 B 2
+
+  # B is not deferred in either of the first two tests below, since filtering
+  # on "M" or "D" returns 10 documents or so. But filtering on "M * D" only
+  # returns 2, so B is deferred in this case.
+  #
+  do_fts3query_test 7.$tn.1             t1 {"M B"}
+  do_fts3query_test 7.$tn.2             t1 {"B D"}
+  do_fts3query_test 7.$tn.3 -deferred B t1 {"M B D"}
+}
+
 set sqlite_fts3_enable_parentheses $sfep
 finish_test
 
diff --git a/test/fts3d.test b/test/fts3d.test
index 715980d8..1ae992b3 100644
--- a/test/fts3d.test
+++ b/test/fts3d.test
@@ -304,4 +304,57 @@ do_test fts3d-5.1 {
   }
 } {{Index already optimal} 2 0}
 
+
+# ALTER TABLE RENAME should work regardless of the database encoding.
+#
+do_test fts3d-6.0 {
+  db close
+  forcedelete test.db
+  sqlite3 db test.db
+  db eval {
+    PRAGMA encoding=UTF8;
+    CREATE VIRTUAL TABLE fts USING fts3(a,b,c);
+    SELECT name FROM sqlite_master WHERE name GLOB '???_*' ORDER BY 1;
+  }
+} {fts_content fts_segdir fts_segments}
+do_test fts3d-6.1 {
+  db eval {
+    ALTER TABLE fts RENAME TO xyz;
+    SELECT name FROM sqlite_master WHERE name GLOB '???_*' ORDER BY 1;
+  }
+} {xyz_content xyz_segdir xyz_segments}
+do_test fts3d-6.2 {
+  db close
+  forcedelete test.db
+  sqlite3 db test.db
+  db eval {
+    PRAGMA encoding=UTF16le;
+    CREATE VIRTUAL TABLE fts USING fts3(a,b,c);
+    SELECT name FROM sqlite_master WHERE name GLOB '???_*' ORDER BY 1;
+  }
+} {fts_content fts_segdir fts_segments}
+do_test fts3d-6.3 {
+  db eval {
+    ALTER TABLE fts RENAME TO xyz;
+    SELECT name FROM sqlite_master WHERE name GLOB '???_*' ORDER BY 1;
+  }
+} {xyz_content xyz_segdir xyz_segments}
+do_test fts3d-6.4 {
+  db close
+  forcedelete test.db
+  sqlite3 db test.db
+  db eval {
+    PRAGMA encoding=UTF16be;
+    CREATE VIRTUAL TABLE fts USING fts3(a,b,c);
+    SELECT name FROM sqlite_master WHERE name GLOB '???_*' ORDER BY 1;
+  }
+} {fts_content fts_segdir fts_segments}
+do_test fts3d-6.5 {
+  db eval {
+    ALTER TABLE fts RENAME TO xyz;
+    SELECT name FROM sqlite_master WHERE name GLOB '???_*' ORDER BY 1;
+  }
+} {xyz_content xyz_segdir xyz_segments}
+ 
+
 finish_test
diff --git a/test/fts3defer.test b/test/fts3defer.test
index 4bc0b0a7..bc50874e 100644
--- a/test/fts3defer.test
+++ b/test/fts3defer.test
@@ -426,6 +426,18 @@ foreach {tn setup} {
       SELECT rowid FROM t1 WHERE t1 MATCH '"jk xduvfhk" OR "zm azavwm"'
     } {8 15 26 92 96}
   }
+
+  if {$tn>1} {
+    # These tests will not work with $tn==1, as in this case table t1 is
+    # created using FTS3. The ^ syntax is only available with FTS4 tables.
+    #
+    do_select_test 7.1 {
+      SELECT rowid FROM t1 WHERE t1 MATCH '^zm mjpavjuhw'
+    } {56 62}
+    do_select_test 7.2 {
+      SELECT rowid FROM t1 WHERE t1 MATCH '^azavwm zm'
+    } {43}
+  }
 }
 
 set testprefix fts3defer
@@ -449,5 +461,33 @@ do_execsql_test 3.3 {
   SELECT count(*) FROM x1 WHERE x1 MATCH '"d e f"'
 } {16}
 
+# At one point the following was causing a floating-point exception.
+#
+do_execsql_test 4.1 {
+  CREATE VIRTUAL TABLE x2 USING FTS4(x);
+  BEGIN;
+  INSERT INTO x2 VALUES('m m m m m m m m m m m m m m m m m m m m m m m m m m');
+  INSERT INTO x2 SELECT * FROM x2;
+  INSERT INTO x2 SELECT * FROM x2;
+  INSERT INTO x2 SELECT * FROM x2;
+  INSERT INTO x2 SELECT * FROM x2;
+  INSERT INTO x2 SELECT * FROM x2;
+  INSERT INTO x2 SELECT * FROM x2;
+  INSERT INTO x2 SELECT * FROM x2;
+  INSERT INTO x2 SELECT * FROM x2;
+  INSERT INTO x2 SELECT * FROM x2;
+  INSERT INTO x2 SELECT * FROM x2;
+  INSERT INTO x2 SELECT * FROM x2;
+  INSERT INTO x2 SELECT * FROM x2;
+  INSERT INTO x2 SELECT * FROM x2;
+  INSERT INTO x2 SELECT * FROM x2;
+  INSERT INTO x2 SELECT * FROM x2;
+  INSERT INTO x2 VALUES('a b c d e f g h i j k l m n o p q r s t u v w x y m');
+  COMMIT;
+}
+do_execsql_test 4.2 {
+  SELECT * FROM x2 WHERE x2 MATCH 'a b c d e f g h i j k l m n o p q r s';
+} {{a b c d e f g h i j k l m n o p q r s t u v w x y m}}
+
 
 finish_test
diff --git a/test/fts3drop.test b/test/fts3drop.test
new file mode 100644
index 00000000..8b76eafe
--- /dev/null
+++ b/test/fts3drop.test
@@ -0,0 +1,61 @@
+# 2011 October 29
+#
+# The author disclaims copyright to this source code.  In place of
+# a legal notice, here is a blessing:
+#
+#    May you do good and not evil.
+#    May you find forgiveness for yourself and forgive others.
+#    May you share freely, never taking more than you give.
+#
+#*************************************************************************
+# This file implements regression tests for SQLite library.  The
+# focus of this script is testing the FTS3 module. More specifically,
+# that DROP TABLE commands can co-exist with savepoints inside transactions.
+# See ticket [48f299634a] for details.
+#
+
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+set testprefix fts3drop
+
+# If SQLITE_ENABLE_FTS3 is defined, omit this file.
+ifcapable !fts3 {
+  finish_test
+  return
+}
+
+do_execsql_test 1.1 {
+  CREATE VIRTUAL TABLE f1 USING fts3;
+  INSERT INTO f1 VALUES('a b c');
+}
+
+do_execsql_test 1.2 {
+  BEGIN;
+    INSERT INTO f1 VALUES('d e f');
+    SAVEPOINT one;
+      INSERT INTO f1 VALUES('g h i');
+      DROP TABLE f1;
+    ROLLBACK TO one;
+  COMMIT;
+}
+
+do_execsql_test 1.3 {
+  SELECT * FROM f1;
+} {{a b c} {d e f}}
+
+do_execsql_test 1.4 {
+  BEGIN;
+    INSERT INTO f1 VALUES('g h i');
+    SAVEPOINT one;
+      INSERT INTO f1 VALUES('j k l');
+      DROP TABLE f1;
+    RELEASE one;
+  ROLLBACK;
+}
+
+do_execsql_test 1.5 {
+  SELECT * FROM f1;
+} {{a b c} {d e f}}
+
+finish_test
diff --git a/test/fts3fault.test b/test/fts3fault.test
index 2dd7bbbc..ab82daa9 100644
--- a/test/fts3fault.test
+++ b/test/fts3fault.test
@@ -18,8 +18,6 @@ set ::testprefix fts3fault
 # If SQLITE_ENABLE_FTS3 is not defined, omit this file.
 ifcapable !fts3 { finish_test ; return }
 
-if 1 {
-
 # Test error handling in the sqlite3Fts3Init() function. This is the 
 # function that registers the FTS3 module and various support functions
 # with SQLite.
@@ -146,7 +144,8 @@ do_faultsim_test 7.2 -prep {
   execsql { CREATE VIRTUAL TABLE t1 USING fts4(a, b, matchinfo=fs3) }
 } -test {
   faultsim_test_result {1 {unrecognized matchinfo: fs3}} \
-                       {1 {vtable constructor failed: t1}}
+                       {1 {vtable constructor failed: t1}} \
+                       {1 {SQL logic error or missing database}}
 }
 do_faultsim_test 7.3 -prep { 
   faultsim_delete_and_reopen
@@ -154,9 +153,8 @@ do_faultsim_test 7.3 -prep {
   execsql { CREATE VIRTUAL TABLE t1 USING fts4(a, b, matchnfo=fts3) }
 } -test {
   faultsim_test_result {1 {unrecognized parameter: matchnfo=fts3}} \
-                       {1 {vtable constructor failed: t1}}
-}
-
+                       {1 {vtable constructor failed: t1}} \
+                       {1 {SQL logic error or missing database}}
 }
 
 proc mit {blob} {
diff --git a/test/fts3fault2.test b/test/fts3fault2.test
index fb877737..0178ed27 100644
--- a/test/fts3fault2.test
+++ b/test/fts3fault2.test
@@ -82,4 +82,53 @@ do_faultsim_test 2.1 -prep {
   faultsim_test_result {0 {a * 1 1 a 0 1 1 b * 1 1 b 0 1 1 c * 1 1 c 0 1 1 x * 1 1 x 1 1 1 y * 1 1 y 1 1 1 z * 1 1 z 1 1 1}}
 }
 
+do_faultsim_test 3.0 -faults oom* -prep {
+  faultsim_delete_and_reopen
+  db eval { CREATE TABLE 'xx yy'(a, b); }
+} -body {
+  execsql {
+    CREATE VIRTUAL TABLE tt USING fts4(content="xx yy");
+  }
+} -test {
+  faultsim_test_result {0 {}}
+}
+
+do_faultsim_test 3.1 -faults oom* -prep {
+  faultsim_delete_and_reopen
+  db func zip zip
+  db func unzip unzip
+} -body {
+  execsql {
+    CREATE VIRTUAL TABLE tt USING fts4(compress=zip, uncompress=unzip);
+  }
+} -test {
+  faultsim_test_result {0 {}}
+}
+
+do_test 4.0 {
+  faultsim_delete_and_reopen
+  execsql {
+    CREATE VIRTUAL TABLE ft USING fts4(a, b);
+    INSERT INTO ft VALUES('U U T C O', 'F N D E S');
+    INSERT INTO ft VALUES('P H X G B', 'I D M R U');
+    INSERT INTO ft VALUES('P P X D M', 'Y V N T C');
+    INSERT INTO ft VALUES('Z L Q O W', 'D F U N Q');
+    INSERT INTO ft VALUES('A J D U P', 'C H M Q E');
+    INSERT INTO ft VALUES('P S A O H', 'S Z C W D');
+    INSERT INTO ft VALUES('T B N L W', 'C A K T I');
+    INSERT INTO ft VALUES('K E Z L O', 'L L Y C E');
+    INSERT INTO ft VALUES('C R E S V', 'Q V F W P');
+    INSERT INTO ft VALUES('S K H G W', 'R W Q F G');
+  }
+  faultsim_save_and_close
+} {}
+do_faultsim_test 4.1 -prep {
+  faultsim_restore_and_reopen
+  db eval {SELECT * FROM sqlite_master}
+} -body {
+  execsql { INSERT INTO ft(ft) VALUES('rebuild') }
+} -test {
+  faultsim_test_result {0 {}}
+}
+
 finish_test
diff --git a/test/fts3first.test b/test/fts3first.test
new file mode 100644
index 00000000..673f818d
--- /dev/null
+++ b/test/fts3first.test
@@ -0,0 +1,163 @@
+# 2011 October 18
+#
+# The author disclaims copyright to this source code.  In place of
+# a legal notice, here is a blessing:
+#
+#    May you do good and not evil.
+#    May you find forgiveness for yourself and forgive others.
+#    May you share freely, never taking more than you give.
+#
+#***********************************************************************
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+source $testdir/malloc_common.tcl
+
+ifcapable !fts3 {
+  finish_test
+  return
+}
+
+set testprefix fts3first
+
+proc lreverse {L} {
+  set res [list]
+  for {set ii [expr [llength $L]-1]} {$ii>=0} {incr ii -1} {
+    lappend res [lindex $L $ii]
+  }
+  set res
+}
+
+proc mit {blob} {
+  set scan(littleEndian) i*
+  set scan(bigEndian) I*
+  binary scan $blob $scan($::tcl_platform(byteOrder)) r
+  return $r
+}
+db func mit mit
+
+do_execsql_test 1.0 {
+  CREATE VIRTUAL TABLE x1 USING FTS4(a, b, c);
+  INSERT INTO x1(docid,a,b,c) VALUES(0, 'K H D S T', 'V M N Y K', 'S Z N Q S');
+  INSERT INTO x1(docid,a,b,c) VALUES(1, 'K N J L W', 'S Z W J Q', 'D U W S E');
+  INSERT INTO x1(docid,a,b,c) VALUES(2, 'B P M O I', 'R P H W S', 'R J L L E');
+  INSERT INTO x1(docid,a,b,c) VALUES(3, 'U R Q M L', 'M J K A V', 'Q W J T J');
+  INSERT INTO x1(docid,a,b,c) VALUES(4, 'N J C Y N', 'R U D X V', 'B O U A Q');
+  INSERT INTO x1(docid,a,b,c) VALUES(5, 'Q L X L U', 'I F N X S', 'U Q A N Y');
+  INSERT INTO x1(docid,a,b,c) VALUES(6, 'M R G U T', 'U V I Q P', 'X Y D L S');
+  INSERT INTO x1(docid,a,b,c) VALUES(7, 'D Y P O I', 'X J P K R', 'V O T H V');
+  INSERT INTO x1(docid,a,b,c) VALUES(8, 'R Y D L R', 'U U E S J', 'N W L M R');
+  INSERT INTO x1(docid,a,b,c) VALUES(9, 'Z P F N P', 'W A X D U', 'V A E Q A');
+  INSERT INTO x1(docid,a,b,c) VALUES(10, 'Q I A Q M', 'N D K H C', 'A H T Q Z');
+  INSERT INTO x1(docid,a,b,c) VALUES(11, 'T E R Q B', 'C I B C B', 'F Z U W R');
+  INSERT INTO x1(docid,a,b,c) VALUES(12, 'E S V U W', 'T P F W H', 'A M D J Q');
+  INSERT INTO x1(docid,a,b,c) VALUES(13, 'X S B X Y', 'U D N D P', 'X Z Y G F');
+  INSERT INTO x1(docid,a,b,c) VALUES(14, 'K H A B L', 'S R C C Z', 'D W E H J');
+  INSERT INTO x1(docid,a,b,c) VALUES(15, 'C E U C C', 'W F M N M', 'T Z U X T');
+  INSERT INTO x1(docid,a,b,c) VALUES(16, 'Q G C G H', 'H N N B H', 'B Q I H Y');
+  INSERT INTO x1(docid,a,b,c) VALUES(17, 'Q T S K B', 'W B D Y N', 'V J P E C');
+  INSERT INTO x1(docid,a,b,c) VALUES(18, 'A J M O Q', 'L G Y Y A', 'G N M R N');
+  INSERT INTO x1(docid,a,b,c) VALUES(19, 'T R Y P Y', 'N V Y B X', 'L Z T N T');
+
+  CREATE VIRTUAL TABLE x2 USING FTS4(a, b, c, order=DESC);
+  INSERT INTO x2(docid, a, b, c) SELECT docid, a, b, c FROM x1;
+}
+
+
+# Test queries.
+#
+foreach x {1 2} {
+  foreach {tn match res} {
+    1  "^K"              {0 1 14}
+    2  "^S"              {0 1 14}
+    3  "^W"              {9 15 17}
+    4  "^J"              {}
+    5  "^E"              {12}
+    6  "V ^-E"           {0 3 4 6 7 9 17 19}
+    7  "V -^E"           {0 3 4 6 7 9 17 19}
+    8  "^-E V"           {0 3 4 6 7 9 17 19}
+    9  "-^E V"           {0 3 4 6 7 9 17 19}
+    10 "V"               {0 3 4 6 7 9 12 17 19}
+
+    11 {"^K H"}          {0 14}
+    12 {"K H"}           {0 10 14}
+    13 {"K ^H"}          {}
+  } {
+    set rev [lreverse $res]
+    do_execsql_test 1.$x.$tn.1 {SELECT docid FROM x1 WHERE x1 MATCH $match} $res
+    do_execsql_test 1.$x.$tn.2 {SELECT docid FROM x2 WHERE x2 MATCH $match} $rev
+  }
+
+  do_execsql_test 1.$x.[expr $tn+1] { 
+    INSERT INTO x1(x1) VALUES('optimize');
+    INSERT INTO x2(x2) VALUES('optimize');
+  } {}
+}
+
+# Test the snippet() function.
+#
+foreach {tn match res} {
+  1  {^K}    {{[K] H D S T} {[K] N J L W} {[K] H A B L}}
+  2  {^X}    {{[X] Y D L S} {[X] J P K R} {[X] S B X Y}}
+  3  {^X Y}  {{[X] [Y] D L S} {D [Y] P O I...[X] J P K R} {[X] S B X [Y]}}
+} {
+  set rev [lreverse $res]
+
+  do_execsql_test 1.3.$tn.1 {
+    SELECT snippet(x1, '[', ']', '...') FROM x1 WHERE x1 MATCH $match
+  } $res
+
+  do_execsql_test 1.3.$tn.2 {
+    SELECT snippet(x2, '[', ']', '...') FROM x2 WHERE x2 MATCH $match
+  } $rev
+}
+
+# Test matchinfo().
+#
+foreach {tn match res} {
+  1  {^K}    {
+                {1 3 3 0 0 0 0 0 0}
+                {1 3 3 0 0 0 0 0 0}
+                {1 3 3 0 0 0 0 0 0}
+             }
+  2  {^X}    {
+                {0 1 1 0 1 1 1 2 2}
+                {0 1 1 1 1 1 0 2 2}
+                {1 1 1 0 1 1 1 2 2}
+             }
+  3  {^X Y}  {
+                {0 1 1 0 1 1 1 2 2 0 6 5 0 5 4 1 4 4} 
+                {0 1 1 1 1 1 0 2 2 1 6 5 0 5 4 0 4 4} 
+                {1 1 1 0 1 1 1 2 2 1 6 5 0 5 4 1 4 4}
+             }
+} {
+  set rev [lreverse $res]
+
+  do_execsql_test 1.3.$tn.1 {
+    SELECT mit(matchinfo(x1, 'x')) FROM x1 WHERE x1 MATCH $match
+  } $res
+  do_execsql_test 1.3.$tn.2 {
+    SELECT mit(matchinfo(x2, 'x')) FROM x2 WHERE x2 MATCH $match
+  } $rev
+}
+
+# Test that ^ is ignored for FTS3 tables.
+#
+do_execsql_test 2.1 {
+  CREATE VIRTUAL TABLE x3 USING fts3;
+  INSERT INTO x3 VALUES('A B C');
+  INSERT INTO x3 VALUES('B A C');
+
+  CREATE VIRTUAL TABLE x4 USING fts4;
+  INSERT INTO x4 VALUES('A B C');
+  INSERT INTO x4 VALUES('B A C');
+}
+
+do_execsql_test 2.2.1 {
+  SELECT * FROM x3 WHERE x3 MATCH '^A';
+} {{A B C} {B A C}}
+do_execsql_test 2.2.2 {
+  SELECT * FROM x4 WHERE x4 MATCH '^A';
+} {{A B C}}
+
+finish_test
diff --git a/test/fts3malloc.test b/test/fts3malloc.test
index 932ea098..7eeee7fe 100644
--- a/test/fts3malloc.test
+++ b/test/fts3malloc.test
@@ -294,6 +294,7 @@ do_write_test fts3_malloc-5.1 ft_content {
 do_test fts3_malloc-5.2 {
   execsql { CREATE VIRTUAL TABLE ft8 USING fts3(x, tokenize porter) }
 } {}
+
 do_write_test fts3_malloc-5.3 ft_content {
   INSERT INTO ft8 VALUES('short alongertoken reallyquitealotlongerimeanit andthistokenisjustsolongthatonemightbeforgivenforimaginingthatitwasmerelyacontrivedexampleandnotarealtoken')
 }
diff --git a/test/fts3matchinfo.test b/test/fts3matchinfo.test
index 40366b6a..0e888580 100644
--- a/test/fts3matchinfo.test
+++ b/test/fts3matchinfo.test
@@ -19,6 +19,7 @@ source $testdir/tester.tcl
 ifcapable !fts3 { finish_test ; return }
 
 set testprefix fts3matchinfo
+set sqlite_fts3_enable_parentheses 0
 
 proc mit {blob} {
   set scan(littleEndian) i*
@@ -57,6 +58,9 @@ do_catchsql_test 2.0 {
 do_catchsql_test 2.1 {
   CREATE VIRTUAL TABLE x2 USING fts4(mtchinfo=fts3);
 } {1 {unrecognized parameter: mtchinfo=fts3}}
+do_catchsql_test 2.2 {
+  CREATE VIRTUAL TABLE x2 USING fts4(matchinfo=fts5);
+} {1 {unrecognized matchinfo: fts5}}
 
 # Check that with fts3, the "=" character is permitted in column definitions.
 #
@@ -224,6 +228,18 @@ do_matchinfo_test 4.1.3 t4 {t4 MATCH 'a b'}     { s {{2 0} {0 2}} }
 do_matchinfo_test 4.1.4 t4 {t4 MATCH '"a b" c'} { s {{2 0} {0 2}} }
 do_matchinfo_test 4.1.5 t4 {t4 MATCH 'a "b c"'} { s {{2 0} {0 2}} }
 do_matchinfo_test 4.1.6 t4 {t4 MATCH 'd d'}     { s {{1 0} {0 1}} }
+do_matchinfo_test 4.1.7 t4 {t4 MATCH 'f OR abcd'} {
+  x { 
+    {0 1 1  1 1 1  0 0 0  0 0 0} 
+    {1 1 1  0 1 1  0 0 0  0 0 0}
+  }
+}
+do_matchinfo_test 4.1.8 t4 {t4 MATCH 'f -abcd'} {
+  x { 
+    {0 1 1  1 1 1}
+    {1 1 1  0 1 1}
+  }
+}
 
 do_execsql_test 4.2.0 {
   CREATE VIRTUAL TABLE t5 USING fts4;
diff --git a/test/fts3prefix.test b/test/fts3prefix.test
index f5e31f32..e7c197da 100644
--- a/test/fts3prefix.test
+++ b/test/fts3prefix.test
@@ -200,4 +200,14 @@ do_execsql_test 4.6 {
   SELECT * FROM t3 WHERE t3 MATCH 'one*'
 } {{one two three}}
 
+#-------------------------------------------------------------------------
+# Syntax tests.
+#
+do_catchsql_test 5.1 {
+  CREATE VIRTUAL TABLE t4 USING fts4(prefix="abc");
+} {1 {error parsing prefix parameter: abc}}
+do_catchsql_test 5.2 {
+  CREATE VIRTUAL TABLE t4 USING fts4(prefix="");
+} {0 {}}
+
 finish_test
diff --git a/test/fts3snippet.test b/test/fts3snippet.test
index 359a87c6..b8646cdf 100644
--- a/test/fts3snippet.test
+++ b/test/fts3snippet.test
@@ -131,7 +131,7 @@ foreach {DO_MALLOC_TEST enc} {
 } {
 
   db close
-  file delete -force test.db
+  forcedelete test.db
   sqlite3 db test.db
   sqlite3_db_config_lookaside db 0 0 0
   db eval "PRAGMA encoding = \"$enc\""
diff --git a/test/fts3sort.test b/test/fts3sort.test
index ce5b5df7..be756043 100644
--- a/test/fts3sort.test
+++ b/test/fts3sort.test
@@ -138,6 +138,8 @@ foreach {tn param res} {
   3 "order=dec"             {1 {unrecognized order: dec}}
   4 "order=xxx, order=asc"  {1 {unrecognized order: xxx}}
   5 "order=desc, order=asc" {0 {}}
+  6 "order=xxxx, order=asc" {1 {unrecognized order: xxxx}}
+  7 "order=desk"            {1 {unrecognized order: desk}}
 } {
   execsql { DROP TABLE IF EXISTS t1 }
   do_catchsql_test 2.1.$tn "
@@ -157,6 +159,27 @@ do_execsql_test 2.2 {
 do_execsql_test 2.3 {
   SELECT docid FROM t2 WHERE t2 MATCH 'aa';
 } {3 1}
+do_execsql_test 2.4 {
+  SELECT docid FROM t2 WHERE t2 MATCH 'aa' ORDER BY content;
+} {1 3}
+
+#-------------------------------------------------------------------------
+# Test that ticket [56be976859] has been fixed.
+#
+do_execsql_test 3.1 {
+  CREATE VIRTUAL TABLE t3 USING fts4(x, order=DESC);
+  INSERT INTO t3(docid, x) VALUES(113382409004785664, 'aa');
+  INSERT INTO t3(docid, x) VALUES(1, 'ab');
+  SELECT rowid FROM t3 WHERE x MATCH 'a*' ORDER BY docid DESC;
+} {113382409004785664 1}
+do_execsql_test 3.2 {
+  CREATE VIRTUAL TABLE t4 USING fts4(x);
+  INSERT INTO t4(docid, x) VALUES(-113382409004785664, 'aa');
+  INSERT INTO t4(docid, x) VALUES(1, 'ab');
+  SELECT rowid FROM t4 WHERE x MATCH 'a*';
+} {-113382409004785664 1}
+
+
 
 finish_test
 
diff --git a/test/fts4aa.test b/test/fts4aa.test
index 1131df3b..c5693317 100644
--- a/test/fts4aa.test
+++ b/test/fts4aa.test
@@ -1686,7 +1686,7 @@ foreach {q r} [array get fts4aa_res] {
 #
 do_test fts4aa-3.0 {
   db close
-  file delete -force test.db
+  forcedelete test.db
   sqlite3 db test.db
   db eval {
     PRAGMA page_size=65536;
diff --git a/test/fts4content.test b/test/fts4content.test
new file mode 100644
index 00000000..025b600b
--- /dev/null
+++ b/test/fts4content.test
@@ -0,0 +1,501 @@
+# 2011 October 03
+#
+# The author disclaims copyright to this source code.  In place of
+# a legal notice, here is a blessing:
+#
+#    May you do good and not evil.
+#    May you find forgiveness for yourself and forgive others.
+#    May you share freely, never taking more than you give.
+#
+#*************************************************************************
+# This file implements regression tests for SQLite library.  The
+# focus of this script is testing the content=xxx FTS4 option.
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+set ::testprefix fts4content
+
+# If SQLITE_ENABLE_FTS3 is defined, omit this file.
+ifcapable !fts3 {
+  finish_test
+  return
+}
+
+#-------------------------------------------------------------------------
+# Test organization:
+#   
+#   1.* - Warm-body tests.
+#
+#   2.* - Querying a content=xxx FTS table.
+#
+#   3.* - Writing to a content=xxx FTS table.
+#
+#   4.* - The "INSERT INTO fts(fts) VALUES('rebuild')" command.
+#
+#   5.* - Check that CREATE TABLE, DROP TABLE and ALTER TABLE correctly
+#         ignore any %_content table when used with the content=xxx option.
+#
+#   6.* - Test the effects of messing with the schema of table xxx after
+#         creating a content=xxx FTS index.
+#   
+#   7.* - Test that if content=xxx is specified and table xxx does not
+#         exist, the FTS table can still be used for INSERT and some
+#         SELECT statements.
+#
+
+do_execsql_test 1.1.1 {
+  CREATE TABLE t1(a, b, c);
+  INSERT INTO t1 VALUES('w x', 'x y', 'y z');
+  CREATE VIRTUAL TABLE ft1 USING fts4(content=t1);
+}
+
+do_execsql_test 1.1.2 {
+  PRAGMA table_info(ft1);
+} {
+  0 a {} 0 {} 0 
+  1 b {} 0 {} 0 
+  2 c {} 0 {} 0
+}
+
+do_execsql_test 1.1.3 { SELECT *, rowid FROM ft1 } {{w x} {x y} {y z} 1}
+do_execsql_test 1.1.4 { SELECT a, c FROM ft1 WHERE rowid=1 } {{w x} {y z}}
+
+do_execsql_test 1.1.5 { INSERT INTO ft1(ft1) VALUES('rebuild') } {}
+do_execsql_test 1.1.6 { SELECT rowid FROM ft1 WHERE ft1 MATCH 'x' } {1}
+do_execsql_test 1.1.7 { SELECT rowid FROM ft1 WHERE ft1 MATCH 'a' } {}
+
+do_execsql_test 1.2.1 {
+  DROP TABLE ft1;
+  CREATE VIRTUAL TABLE ft1 USING fts4(content=t1, b);
+  PRAGMA table_info(ft1);
+} {
+  0 b {} 0 {} 0 
+}
+do_execsql_test 1.2.2 { 
+  SELECT *, rowid FROM ft1 
+} {{x y} 1}
+
+#-------------------------------------------------------------------------
+# The following block of tests - 2.* - test that a content=xxx FTS table
+# can be queried. Also tested are cases where rows identified in the FTS
+# are missing from the content table, and cases where the index is 
+# inconsistent with the content table.
+# 
+do_execsql_test 2.0 {
+  CREATE TABLE t2(x);
+  INSERT INTO t2 VALUES('O S W W F U C R Q I C N P Z Y Y E Y Y E');  -- 1
+  INSERT INTO t2 VALUES('Y X U V L B E H Y J C Y A I A P V F V K');  -- 2
+  INSERT INTO t2 VALUES('P W I N J H I I N I F B K D U Q B Z S F');  -- 3
+  INSERT INTO t2 VALUES('N R O R H J R H G M D I U U B O M P A U');  -- 4
+  INSERT INTO t2 VALUES('Y O V O G T P N G T N F I V B U M J M G');  -- 5
+  INSERT INTO t2 VALUES('J O B N K N E C H Z R K J O U G M K L S');  -- 6
+  INSERT INTO t2 VALUES('S Z S R I Q U A P W R X H K C Z U L S P');  -- 7
+  INSERT INTO t2 VALUES('J C H N R C K R V N M O F Z M Z A I H W');  -- 8
+  INSERT INTO t2 VALUES('O Y G I S J U U W O D Z F J K N R P R L');  -- 9
+  INSERT INTO t2 VALUES('B G L K U R U P V X Z I H V R W C Q A S');  -- 10
+  INSERT INTO t2 VALUES('T F T J F F Y V F W N X K Q A Y L X W G');  -- 11
+  INSERT INTO t2 VALUES('C J U H B Q X L C M M Y E G V F W V Z C');  -- 12
+  INSERT INTO t2 VALUES('B W L T F S G X D P H N G M R I O A X I');  -- 13
+  INSERT INTO t2 VALUES('N G Y O K Q K Z N M H U J E D H U W R K');  -- 14
+  INSERT INTO t2 VALUES('U D T R U Y F J D S J X E H Q G V A S Z');  -- 15
+  INSERT INTO t2 VALUES('M I W P J S H R J D Q I C G P C T P H R');  -- 16
+  INSERT INTO t2 VALUES('J M N I S L X Q C A B F C B Y D H V R J');  -- 17
+  INSERT INTO t2 VALUES('F V Z W J Q L P X Y E W B U Q N H X K T');  -- 18
+  INSERT INTO t2 VALUES('R F S R Y O F Q E I E G H C B H R X Y N');  -- 19
+  INSERT INTO t2 VALUES('U Q Q Q T E P D M F X P J G H X C Q D L');  -- 20
+}
+
+do_execsql_test 2.1 {
+  CREATE VIRTUAL TABLE ft2 USING fts4(content=t2);
+  INSERT INTO ft2(ft2) VALUES('rebuild');
+
+  -- Modify the backing table a bit: Row 17 is missing and the contents 
+  -- of row 20 do not match the FTS index contents. 
+  DELETE FROM t2 WHERE rowid = 17;
+  UPDATE t2 SET x = 'a b c d e f g h i j' WHERE rowid = 20;
+}
+
+foreach {tn match rowidlist} {
+  1   {S}        {1 3 6 7 9 10 13 15 16 17 19}
+  2   {"S R"}    {7 19}
+  3   {"N K N"}  {6}
+  4   {"Q Q"}    {20}
+  5   {"B Y D"}  {17}
+} {
+  do_execsql_test 2.2.1.$tn {
+    SELECT rowid FROM ft2 WHERE ft2 MATCH $match
+  } $rowidlist
+
+  do_execsql_test 2.2.2.$tn {
+    SELECT docid FROM ft2 WHERE ft2 MATCH $match
+  } $rowidlist
+}
+
+foreach {tn match result} {
+  1   {"N K N"}  {{J O B N K N E C H Z R K J O U G M K L S}}
+  2   {"Q Q"}    {{a b c d e f g h i j}}
+  3   {"B Y D"}  {{}}
+} {
+  do_execsql_test 2.3.$tn {
+    SELECT * FROM ft2 WHERE ft2 MATCH $match
+  } $result
+}
+
+foreach {tn match result} {
+  1   {"N K N"}  {{..O B [N] [K] [N] E..}}
+  2   {"B Y D"}  {{}}
+  3   {"Q Q"}    {{a [b] [c] [d] e f..}}
+} {
+  do_execsql_test 2.4.$tn {
+    SELECT snippet(ft2, '[', ']', '..', -1, 6) FROM ft2 WHERE ft2 MATCH $match
+  } $result
+}
+
+foreach {tn match result} {
+  1   {"N K N"}  {{0 0 6 1 0 1 8 1 0 2 10 1}}
+  2   {"B Y D"}  {{}}
+  3   {"Q Q"}    {{0 0 2 1 0 0 4 1 0 1 4 1 0 1 6 1}}
+  4   {"Q D L"}  {{}}
+} {
+  do_execsql_test 2.5.$tn {
+    SELECT offsets(ft2) FROM ft2 WHERE ft2 MATCH $match
+  } $result
+}
+
+#-------------------------------------------------------------------------
+# The following block of tests - 3.* - test that the FTS index can be
+# modified by writing to the table. But that this has no effect on the 
+# content table.
+# 
+
+do_execsql_test 3.1 {
+  CREATE TABLE t3(x, y);
+  CREATE VIRTUAL TABLE ft3 USING fts4(content=t3);
+}
+
+do_catchsql_test 3.1.1 {
+  INSERT INTO ft3 VALUES('a b c', 'd e f');
+} {1 {constraint failed}}
+do_execsql_test 3.1.2 {
+  INSERT INTO ft3(docid, x, y) VALUES(21, 'a b c', 'd e f');
+  SELECT rowid FROM ft3 WHERE ft3 MATCH '"a b c"';
+} {21}
+do_execsql_test 3.1.3 { SELECT * FROM t3 } {}
+
+# This DELETE does not work, since there is no row in [t3] to base the
+# DELETE on. So the SELECT on [ft3] still returns rowid 21.
+do_execsql_test 3.1.4 { 
+  DELETE FROM ft3;
+  SELECT rowid FROM ft3 WHERE ft3 MATCH '"a b c"';
+} {21}
+
+# If the row is added to [t3] before the DELETE on [ft3], it works.
+do_execsql_test 3.1.5 {
+  INSERT INTO t3(rowid, x, y) VALUES(21, 'a b c', 'd e f');
+  DELETE FROM ft3;
+  SELECT rowid FROM ft3 WHERE ft3 MATCH '"a b c"';
+} {}
+do_execsql_test 3.1.6 { SELECT rowid FROM t3 } {21}
+
+do_execsql_test 3.2.1 {
+  INSERT INTO ft3(rowid, x, y) VALUES(0, 'R T M S M', 'A F O K H');
+  INSERT INTO ft3(rowid, x, y) VALUES(1, 'C Z J O X', 'U S Q D K');
+  INSERT INTO ft3(rowid, x, y) VALUES(2, 'N G H P O', 'N O P O C');
+  INSERT INTO ft3(rowid, x, y) VALUES(3, 'V H S D R', 'K N G E C');
+  INSERT INTO ft3(rowid, x, y) VALUES(4, 'J T R V U', 'U X S L C');
+  INSERT INTO ft3(rowid, x, y) VALUES(5, 'N A Y N G', 'X D G P Y');
+  INSERT INTO ft3(rowid, x, y) VALUES(6, 'I Q I S P', 'D R O Q B');
+  INSERT INTO ft3(rowid, x, y) VALUES(7, 'T K T Z J', 'B W D G O');
+  INSERT INTO ft3(rowid, x, y) VALUES(8, 'Y K F X T', 'D F G V G');
+  INSERT INTO ft3(rowid, x, y) VALUES(9, 'E L E T L', 'P W N F Z');
+  INSERT INTO ft3(rowid, x, y) VALUES(10, 'O G J G X', 'G J F E P');
+  INSERT INTO ft3(rowid, x, y) VALUES(11, 'O L N N Z', 'K E Z F D');
+  INSERT INTO ft3(rowid, x, y) VALUES(12, 'R Z M R J', 'X G I M Z');
+  INSERT INTO ft3(rowid, x, y) VALUES(13, 'L X N N X', 'R R N S T');
+  INSERT INTO ft3(rowid, x, y) VALUES(14, 'F L B J H', 'K W F L C');
+  INSERT INTO ft3(rowid, x, y) VALUES(15, 'P E B M V', 'E A A B U');
+  INSERT INTO ft3(rowid, x, y) VALUES(16, 'V E C F P', 'L U T V K');
+  INSERT INTO ft3(rowid, x, y) VALUES(17, 'T N O Z N', 'T P Q X N');
+  INSERT INTO ft3(rowid, x, y) VALUES(18, 'V W U W R', 'H O A A V');
+  INSERT INTO ft3(rowid, x, y) VALUES(19, 'A H N L F', 'I G H B O');
+}
+
+foreach {tn match rowidlist} {
+  1   "N A"    {5 19}
+  2   "x:O"    {1 2 10 11 17}
+  3   "y:O"    {0 2 6 7 18 19}
+} {
+  set res [list]
+  foreach rowid $rowidlist { lappend res $rowid {} {} }
+
+  do_execsql_test 3.2.2.$tn {
+    SELECT rowid, * FROM ft3 WHERE ft3 MATCH $match
+  } $res
+  do_execsql_test 3.2.3.$tn {
+    SELECT docid, * FROM ft3 WHERE ft3 MATCH $match
+  } $res
+}
+
+do_execsql_test 3.3.1 {
+  INSERT INTO t3(rowid, x, y) VALUES(0, 'R T M S M', 'A F O K H');
+  INSERT INTO t3(rowid, x, y) VALUES(1, 'C Z J O X', 'U S Q D K');
+  INSERT INTO t3(rowid, x, y) VALUES(2, 'N G H P O', 'N O P O C');
+  INSERT INTO t3(rowid, x, y) VALUES(3, 'V H S D R', 'K N G E C');
+  INSERT INTO t3(rowid, x, y) VALUES(4, 'J T R V U', 'U X S L C');
+  INSERT INTO t3(rowid, x, y) VALUES(5, 'N A Y N G', 'X D G P Y');
+  UPDATE ft3 SET x = y, y = x;
+  DELETE FROM t3;
+}
+
+foreach {tn match rowidlist} {
+  1   "N A"    {5 19}
+  2   "x:O"    {0 2 10 11 17}
+  3   "y:O"    {1 2 6 7 18 19}
+} {
+  set res [list]
+  foreach rowid $rowidlist { lappend res $rowid {} {} }
+
+  do_execsql_test 3.3.2.$tn {
+    SELECT rowid, * FROM ft3 WHERE ft3 MATCH $match
+  } $res
+  do_execsql_test 3.3.3.$tn {
+    SELECT docid, * FROM ft3 WHERE ft3 MATCH $match
+  } $res
+}
+
+do_execsql_test 3.3.1 {
+  INSERT INTO t3(rowid, x, y) VALUES(15, 'P E B M V', 'E A A B U');
+  INSERT INTO t3(rowid, x, y) VALUES(16, 'V E C F P', 'L U T V K');
+  INSERT INTO t3(rowid, x, y) VALUES(17, 'T N O Z N', 'T P Q X N');
+  INSERT INTO t3(rowid, x, y) VALUES(18, 'V W U W R', 'H O A A V');
+  INSERT INTO t3(rowid, x, y) VALUES(19, 'A H N L F', 'I G H B O');
+  DELETE FROM ft3;
+}
+
+foreach {tn match rowidlist} {
+  1   "N A"    {5}
+  2   "x:O"    {0 2 10 11}
+  3   "y:O"    {1 2 6 7}
+} {
+  set res [list]
+  foreach rowid $rowidlist { lappend res $rowid {} {} }
+
+  do_execsql_test 3.3.2.$tn {
+    SELECT rowid, * FROM ft3 WHERE ft3 MATCH $match
+  } $res
+  do_execsql_test 3.3.3.$tn {
+    SELECT docid, * FROM ft3 WHERE ft3 MATCH $match
+  } $res
+}
+
+
+#-------------------------------------------------------------------------
+# Test cases 4.* test the 'rebuild' command. On content=xxx and regular
+# FTS tables.
+# 
+do_execsql_test 4.0 {
+  CREATE TABLE t4(x);
+  CREATE VIRTUAL TABLE ft4 USING fts4(content=t4);
+  CREATE VIRTUAL TABLE ft4x USING fts4(x);
+}
+
+do_execsql_test 4.1.1 {
+  INSERT INTO ft4x(ft4x) VALUES('rebuild');
+  INSERT INTO ft4(ft4) VALUES('rebuild');
+} {}
+do_execsql_test 4.1.2 {
+  SELECT id, quote(value) FROM ft4_stat
+} {0 X'000000'}
+do_execsql_test 4.1.3 {
+  SELECT id, quote(value) FROM ft4x_stat
+} {0 X'000000'}
+
+do_execsql_test 4.2.1 {
+  INSERT INTO ft4x VALUES('M G M F T');
+  INSERT INTO ft4x VALUES('Z Q C A U');
+  INSERT INTO ft4x VALUES('N L L V');
+  INSERT INTO ft4x VALUES('T F D X D');
+  INSERT INTO ft4x VALUES('Z H I S D');
+
+  SELECT id, quote(value) FROM ft4x_stat
+} {0 X'05182B'}
+
+do_execsql_test 4.2.2 {
+  INSERT INTO ft4(rowid, x) SELECT rowid, * FROM ft4x;
+  SELECT id, quote(value) FROM ft4_stat
+} {0 X'05182B'}
+
+do_execsql_test 4.2.3 {
+  SELECT docid, quote(size) FROM ft4_docsize
+} {1 X'05' 2 X'05' 3 X'04' 4 X'05' 5 X'05'}
+
+do_execsql_test 4.2.4 {
+  INSERT INTO ft4x(ft4x) VALUES('rebuild');
+  SELECT id, quote(value) FROM ft4x_stat;
+  SELECT docid, quote(size) FROM ft4x_docsize
+} {0 X'05182B' 1 X'05' 2 X'05' 3 X'04' 4 X'05' 5 X'05'}
+
+do_execsql_test 4.2.5 {
+  INSERT INTO ft4(ft4) VALUES('rebuild');
+  SELECT id, quote(value) FROM ft4_stat;
+  SELECT docid, quote(size) FROM ft4_docsize
+} {0 X'000000'}
+
+do_execsql_test 4.2.6 {
+  INSERT INTO t4(rowid, x) SELECT rowid, x FROM ft4x;
+  INSERT INTO ft4(ft4) VALUES('rebuild');
+  SELECT id, quote(value) FROM ft4_stat;
+  SELECT docid, quote(size) FROM ft4_docsize
+} {0 X'05182B' 1 X'05' 2 X'05' 3 X'04' 4 X'05' 5 X'05'}
+
+
+#-------------------------------------------------------------------------
+# Test cases 5.* test that the following commands do not create/move or
+# delete a %_content table when used with a content=xxx FTS table.
+# 
+do_execsql_test 5.1.1 {
+  CREATE TABLE t5(a, b, c, d);
+  CREATE VIRTUAL TABLE ft5 USING fts4(content=t5);
+  SELECT name FROM sqlite_master WHERE name LIKE '%t5%';
+} {
+  t5 ft5 ft5_segments ft5_segdir 
+  sqlite_autoindex_ft5_segdir_1 ft5_docsize ft5_stat
+}
+do_execsql_test 5.1.2 {
+  ALTER TABLE ft5 RENAME TO ft6;
+  SELECT name FROM sqlite_master WHERE name LIKE '%t5%';
+} {
+  t5
+}
+do_execsql_test 5.1.3 {
+  SELECT name FROM sqlite_master WHERE name LIKE '%t6%';
+} {
+  ft6 ft6_segments ft6_segdir 
+  sqlite_autoindex_ft6_segdir_1 ft6_docsize ft6_stat
+}
+do_execsql_test 5.1.4 {
+  INSERT INTO t5 VALUES('a', 'b', 'c', 'd');
+  INSERT INTO ft6(ft6) VALUES('rebuild');
+  SELECT rowid FROM ft6 WHERE ft6 MATCH 'b';
+} {1}
+do_execsql_test 5.1.5 {
+  DROP TABLE ft6;
+  SELECT * FROM t5;
+} {a b c d}
+do_execsql_test 5.1.6 {
+  SELECT name FROM sqlite_master WHERE name LIKE '%t6%';
+} {
+}
+do_execsql_test 5.1.7 {
+  CREATE VIRTUAL TABLE ft5 USING fts4(content=t5);
+  CREATE TABLE t5_content(a, b);
+  DROP TABLE ft5;
+  SELECT name FROM sqlite_master WHERE name LIKE '%t5%';
+} {
+  t5 t5_content
+}
+
+#-------------------------------------------------------------------------
+# Test cases 6.* test 
+# 
+do_catchsql_test 6.1.1 {
+  CREATE VIRTUAL TABLE ft7 USING fts4(content=t7);
+} {1 {vtable constructor failed: ft7}}
+
+do_execsql_test 6.2.1 {
+  CREATE TABLE t7(one, two);
+  CREATE VIRTUAL TABLE ft7 USING fts4(content=t7);
+  INSERT INTO t7 VALUES('A B', 'B A');
+  INSERT INTO t7 VALUES('C D', 'A A');
+  SELECT * FROM ft7;
+} {
+  {A B} {B A} {C D} {A A}
+}
+
+do_catchsql_test 6.2.2 {
+  DROP TABLE t7;
+  SELECT * FROM ft7;
+} {1 {SQL logic error or missing database}}
+
+db close
+sqlite3 db test.db
+do_execsql_test 6.2.3 {
+  SELECT name FROM sqlite_master WHERE name LIKE '%t7%'
+} {
+  ft7 ft7_segments ft7_segdir sqlite_autoindex_ft7_segdir_1 
+  ft7_docsize ft7_stat
+}
+do_catchsql_test 6.2.4 {
+  SELECT * FROM ft7;
+} {1 {vtable constructor failed: ft7}}
+do_execsql_test 6.2.5 {
+  CREATE TABLE t7(x, y);
+  INSERT INTO t7 VALUES('A B', 'B A');
+  INSERT INTO t7 VALUES('C D', 'A A');
+  SELECT * FROM ft7;
+} {
+  {A B} {B A} {C D} {A A}
+}
+
+do_execsql_test 6.2.6 {
+  INSERT INTO ft7(ft7) VALUES('rebuild');
+  SELECT rowid FROM ft7 WHERE ft7 MATCH '"A A"';
+} {2}
+
+do_execsql_test 6.2.7 {
+  DROP TABLE t7;
+  CREATE TABLE t7(x);
+}
+do_catchsql_test 6.2.8 {
+  SELECT * FROM ft7 WHERE ft7 MATCH '"A A"';
+} {1 {SQL logic error or missing database}}
+do_catchsql_test 6.2.9 {
+  SELECT * FROM ft7 WHERE ft7 MATCH '"A A"';
+} {1 {SQL logic error or missing database}}
+
+db close
+sqlite3 db test.db
+do_catchsql_test 6.2.10 {
+  SELECT rowid FROM ft7 WHERE ft7 MATCH '"A A"';
+} {0 2}
+do_catchsql_test 6.2.11 {
+  SELECT rowid, * FROM ft7 WHERE ft7 MATCH '"A A"';
+} {0 {2 {}}}
+
+#-------------------------------------------------------------------------
+# Test cases 7.*
+# 
+do_execsql_test 7.1.1 {
+  CREATE VIRTUAL TABLE ft8 USING fts4(content=nosuchtable, x);
+  INSERT INTO ft8(docid, x) VALUES(13, 'U O N X G');
+  INSERT INTO ft8(docid, x) VALUES(14, 'C J J U B');
+  INSERT INTO ft8(docid, x) VALUES(15, 'N J Y G X');
+  INSERT INTO ft8(docid, x) VALUES(16, 'R Y D O R');
+  INSERT INTO ft8(docid, x) VALUES(17, 'I Y T Q O');
+}
+
+do_execsql_test 7.1.2 {
+  SELECT docid FROM ft8 WHERE ft8 MATCH 'N';
+} {13 15}
+
+do_execsql_test 7.2.1 {
+  CREATE VIRTUAL TABLE ft9 USING fts4(content=, x);
+  INSERT INTO ft9(docid, x) VALUES(13, 'U O N X G');
+  INSERT INTO ft9(docid, x) VALUES(14, 'C J J U B');
+  INSERT INTO ft9(docid, x) VALUES(15, 'N J Y G X');
+  INSERT INTO ft9(docid, x) VALUES(16, 'R Y D O R');
+  INSERT INTO ft9(docid, x) VALUES(17, 'I Y T Q O');
+}
+do_execsql_test 7.2.2 {
+  SELECT docid FROM ft9 WHERE ft9 MATCH 'N';
+} {13 15}
+do_execsql_test 7.2.3 {
+  SELECT name FROM sqlite_master WHERE name LIKE 'ft9_%';
+} {ft9_segments ft9_segdir ft9_docsize ft9_stat}
+
+do_catchsql_test 7.2.4 {
+  SELECT * FROM ft9 WHERE ft9 MATCH 'N';
+} {1 {SQL logic error or missing database}}
+
+finish_test
diff --git a/test/func3.test b/test/func3.test
index e58d730f..d5a462fe 100644
--- a/test/func3.test
+++ b/test/func3.test
@@ -17,24 +17,26 @@ set testdir [file dirname $argv0]
 source $testdir/tester.tcl
 
 
-do_test func3-1.1 {
-  set destroyed 0
-  proc destroy {} { set ::destroyed 1 }
-  sqlite3_create_function_v2 db f2 -1 any -func f2 -destroy destroy
-  set destroyed
-} 0
-do_test func3-1.2 {
-  sqlite3_create_function_v2 db f2 -1 utf8 -func f2
-  set destroyed
-} 0
-do_test func3-1.3 {
-  sqlite3_create_function_v2 db f2 -1 utf16le -func f2
-  set destroyed
-} 0
-do_test func3-1.4 {
-  sqlite3_create_function_v2 db f2 -1 utf16be -func f2
-  set destroyed
-} 1
+ifcapable utf16 {
+  do_test func3-1.1 {
+    set destroyed 0
+    proc destroy {} { set ::destroyed 1 }
+    sqlite3_create_function_v2 db f2 -1 any -func f2 -destroy destroy
+    set destroyed
+  } 0
+  do_test func3-1.2 {
+    sqlite3_create_function_v2 db f2 -1 utf8 -func f2
+    set destroyed
+  } 0
+  do_test func3-1.3 {
+    sqlite3_create_function_v2 db f2 -1 utf16le -func f2
+    set destroyed
+  } 0
+  do_test func3-1.4 {
+    sqlite3_create_function_v2 db f2 -1 utf16be -func f2
+    set destroyed
+  } 1
+}
 
 do_test func3-2.1 {
   set destroyed 0
diff --git a/test/fuzz_malloc.test b/test/fuzz_malloc.test
index f2209aab..1e31babd 100644
--- a/test/fuzz_malloc.test
+++ b/test/fuzz_malloc.test
@@ -47,7 +47,7 @@ proc do_fuzzy_malloc_test {testname args} {
 
   sqlite3_memdebug_fail -1
   db close
-  file delete test.db test.db-journal
+  delete_file test.db test.db-journal
   sqlite3 db test.db
   set ::prep $::fuzzyopts(-sqlprep)
   execsql $::prep
diff --git a/test/fuzzer1.test b/test/fuzzer1.test
index d0575d2d..6c232118 100644
--- a/test/fuzzer1.test
+++ b/test/fuzzer1.test
@@ -1376,7 +1376,7 @@ do_test fuzzer1-2.3 {
        AND f2.distance<=200
        AND streetname.n>=f2.word AND streetname.n<=(f2.word || x'F7BFBFBF')
   }
-} {steelewood tallia tallu talwyn taymouth thelema trailer {tyler finley}}
+} {{tyler finley} trailer taymouth steelewood tallia tallu talwyn thelema}
 
 
 finish_test
diff --git a/test/hook.test b/test/hook.test
index c4dfb2e4..a195275c 100644
--- a/test/hook.test
+++ b/test/hook.test
@@ -95,7 +95,7 @@ do_test hook-3.9 {
 # Ticket #3564.
 #
 do_test hook-3.10 {
-  file delete -force test2.db test2.db-journal
+  forcedelete test2.db test2.db-journal
   sqlite3 db2 test2.db
   proc commit_hook {} {
     set y [db2 one {SELECT y FROM t3 WHERE y>10}]
@@ -217,7 +217,7 @@ ifcapable trigger {
 set ::update_hook {}
 ifcapable attach {
   do_test hook-4.2.3 {
-    file delete -force test2.db
+    forcedelete test2.db
     execsql {
       ATTACH 'test2.db' AS aux;
       CREATE TABLE aux.t3(a INTEGER PRIMARY KEY, b);
diff --git a/test/incrblob.test b/test/incrblob.test
index 9c9389eb..388c4ba3 100644
--- a/test/incrblob.test
+++ b/test/incrblob.test
@@ -120,7 +120,7 @@ foreach AutoVacuumMode [list 0 1] {
   }
 
   db close
-  file delete -force test.db test.db-journal
+  forcedelete test.db test.db-journal
 
   sqlite3 db test.db
   execsql "PRAGMA auto_vacuum = $AutoVacuumMode"
@@ -379,7 +379,7 @@ ifcapable vtab {
 #
 ifcapable attach {
   do_test incrblob-5.1 {
-    file delete -force test2.db test2.db-journal
+    forcedelete test2.db test2.db-journal
     set ::size [expr [file size [info script]]]
     execsql {
       ATTACH 'test2.db' AS aux;
@@ -584,7 +584,7 @@ set ::data [read $fd 14000]
 close $fd
 
 db close
-file delete -force test.db test.db-journal
+forcedelete test.db test.db-journal
 sqlite3 db test.db
 
 do_test incrblob-7.2.1 {
diff --git a/test/incrblob_err.test b/test/incrblob_err.test
index b4c25877..35d37fee 100644
--- a/test/incrblob_err.test
+++ b/test/incrblob_err.test
@@ -35,6 +35,7 @@ do_malloc_test 1 -tclprep {
   }
 } -tclbody {
   set ::blob [db incrblob blobs v 1]
+  fconfigure $::blob -translation binary
   set rc [catch {puts -nonewline $::blob $::data}]
   if {$rc} { error "out of memory" }
 } 
@@ -71,8 +72,7 @@ do_malloc_test 3 -tclprep {
   if {$rc} { 
     error "out of memory" 
   }
-} 
-
+}
 
 do_ioerr_test incrblob_err-4 -cksum 1 -sqlprep {
   CREATE TABLE blobs(k, v BLOB);
@@ -87,6 +87,7 @@ do_ioerr_test incrblob_err-5 -cksum 1 -sqlprep {
   INSERT INTO blobs VALUES(1, zeroblob(length(CAST($::data AS BLOB))));
 } -tclbody {
   set ::blob [db incrblob blobs v 1]
+  fconfigure $::blob -translation binary
   puts -nonewline $::blob $::data
   close $::blob
 }
@@ -96,6 +97,7 @@ do_ioerr_test incrblob_err-6 -cksum 1 -sqlprep {
   INSERT INTO blobs VALUES(1, $::data || $::data || $::data);
 } -tclbody {
   set ::blob [db incrblob blobs v 1]
+  fconfigure $::blob -translation binary
   seek $::blob -20 end
   puts -nonewline $::blob "12345678900987654321"
   close $::blob
diff --git a/test/incrvacuum.test b/test/incrvacuum.test
index d037d8e7..91f5c8e1 100644
--- a/test/incrvacuum.test
+++ b/test/incrvacuum.test
@@ -331,7 +331,7 @@ proc compare_dbs {A B tname} {
 set ::str1 [string repeat abcdefghij 130]
 set ::str2 [string repeat 1234567890 105]
 
-file delete -force test1.db test1.db-journal test2.db test2.db-journal
+forcedelete test1.db test1.db-journal test2.db test2.db-journal
 sqlite3 db1 test1.db
 sqlite3 db2 test2.db
 execsql { PRAGMA auto_vacuum = 'none' } db1
@@ -475,7 +475,7 @@ do_test incrvacuum-8.1 {
 #
 do_test incrvacuum-9.1 {
   db close
-  file delete -force test.db test.db-journal
+  forcedelete test.db test.db-journal
   sqlite3 db test.db
 
   execsql {
@@ -593,7 +593,7 @@ do_test incrvacuum-10.8 {
 # vacuum mode.
 #
 db close
-file delete -force test.db test.db-journal
+forcedelete test.db test.db-journal
 sqlite3 db test.db
 
 ifcapable default_autovacuum {
@@ -651,7 +651,7 @@ do_test incrvacuum-11.7 {
 # auto_vacuum = XXX" statement is executed.
 #
 db close
-file delete -force test.db test.db-journal
+forcedelete test.db test.db-journal
 sqlite3 db test.db
 
 do_test incrvacuum-12.1 {
@@ -692,7 +692,7 @@ do_test incrvacuum-12.5 {
 #
 db2 close
 db close
-file delete -force test.db test.db-journal
+forcedelete test.db test.db-journal
 sqlite3 db test.db  ;  set ::DB [sqlite3_connection_pointer db]
 sqlite3 db2 test.db
 
@@ -743,7 +743,7 @@ if {[permutation] == ""} {
 do_test incrvacuum-15.1 {
   db close
   db2 close
-  file delete -force test.db
+  forcedelete test.db
   sqlite3 db test.db
 
   set str [string repeat "abcdefghij" 500]
diff --git a/test/incrvacuum2.test b/test/incrvacuum2.test
index 902517c9..e67a0862 100644
--- a/test/incrvacuum2.test
+++ b/test/incrvacuum2.test
@@ -70,7 +70,7 @@ do_test incrvacuum2-1.4 {
 #
 ifcapable attach {
   do_test incrvacuum2-2.1 {
-    file delete -force test2.db test2.db-journal
+    forcedelete test2.db test2.db-journal
     execsql {
       ATTACH DATABASE 'test2.db' AS aux;
       PRAGMA aux.auto_vacuum=incremental;
diff --git a/test/incrvacuum_ioerr.test b/test/incrvacuum_ioerr.test
index 47027b82..946925d7 100644
--- a/test/incrvacuum_ioerr.test
+++ b/test/incrvacuum_ioerr.test
@@ -108,7 +108,7 @@ do_ioerr_test incrvacuum-ioerr-3 -start 1 -cksum 1 -tclprep {
 ifcapable shared_cache {
 
   catch { db close }
-  file delete -force test.db
+  forcedelete test.db
   set ::enable_shared_cache [sqlite3_enable_shared_cache 1]
   
   # Create two connections to a single shared-cache:
diff --git a/test/index4.test b/test/index4.test
new file mode 100644
index 00000000..018ed744
--- /dev/null
+++ b/test/index4.test
@@ -0,0 +1,126 @@
+# 2011 July 9
+#
+# The author disclaims copyright to this source code.  In place of
+# a legal notice, here is a blessing:
+#
+#    May you do good and not evil.
+#    May you find forgiveness for yourself and forgive others.
+#    May you share freely, never taking more than you give.
+#
+#***********************************************************************
+# This file implements regression tests for SQLite library.  The
+# focus of this file is testing the CREATE INDEX statement.
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+set testprefix index4
+
+do_execsql_test 1.1 {
+  BEGIN;
+    CREATE TABLE t1(x);
+    INSERT INTO t1 VALUES(randomblob(102));
+    INSERT INTO t1 SELECT randomblob(102) FROM t1;     --     2
+    INSERT INTO t1 SELECT randomblob(102) FROM t1;     --     4
+    INSERT INTO t1 SELECT randomblob(102) FROM t1;     --     8
+    INSERT INTO t1 SELECT randomblob(102) FROM t1;     --    16
+    INSERT INTO t1 SELECT randomblob(102) FROM t1;     --    32
+    INSERT INTO t1 SELECT randomblob(102) FROM t1;     --    64
+    INSERT INTO t1 SELECT randomblob(102) FROM t1;     --   128
+    INSERT INTO t1 SELECT randomblob(102) FROM t1;     --   256
+    INSERT INTO t1 SELECT randomblob(102) FROM t1;     --   512
+    INSERT INTO t1 SELECT randomblob(102) FROM t1;     --  1024
+    INSERT INTO t1 SELECT randomblob(102) FROM t1;     --  2048
+    INSERT INTO t1 SELECT randomblob(102) FROM t1;     --  4096
+    INSERT INTO t1 SELECT randomblob(102) FROM t1;     --  8192
+    INSERT INTO t1 SELECT randomblob(102) FROM t1;     -- 16384
+    INSERT INTO t1 SELECT randomblob(102) FROM t1;     -- 32768
+    INSERT INTO t1 SELECT randomblob(102) FROM t1;     -- 65536
+  COMMIT;
+}
+
+do_execsql_test 1.2 {
+  CREATE INDEX i1 ON t1(x);
+}
+do_execsql_test 1.3 {
+  PRAGMA integrity_check 
+} {ok}
+
+# The same test again - this time with limited memory.
+#
+ifcapable memorymanage {
+  set soft_limit [sqlite3_soft_heap_limit 50000]
+
+  db close
+  sqlite3 db test.db
+
+  do_execsql_test 1.4 {
+    PRAGMA cache_size = 10;
+    CREATE INDEX i2 ON t1(x);
+  }
+  do_execsql_test 1.5 {
+    PRAGMA integrity_check 
+  } {ok}
+
+  sqlite3_soft_heap_limit $soft_limit
+}
+
+
+do_execsql_test 1.6 {
+  BEGIN;
+    DROP TABLE t1;
+    CREATE TABLE t1(x);
+    INSERT INTO t1 VALUES('a');
+    INSERT INTO t1 VALUES('b');
+    INSERT INTO t1 VALUES('c');
+    INSERT INTO t1 VALUES('d');
+    INSERT INTO t1 VALUES('e');
+    INSERT INTO t1 VALUES('f');
+    INSERT INTO t1 VALUES('g');
+    INSERT INTO t1 VALUES(NULL);
+    INSERT INTO t1 SELECT randomblob(1202) FROM t1;     --    16
+    INSERT INTO t1 SELECT randomblob(2202) FROM t1;     --    32
+    INSERT INTO t1 SELECT randomblob(3202) FROM t1;     --    64
+    INSERT INTO t1 SELECT randomblob(4202) FROM t1;     --   128
+    INSERT INTO t1 SELECT randomblob(5202) FROM t1;     --   256
+  COMMIT;
+  CREATE INDEX i1 ON t1(x); 
+  PRAGMA integrity_check
+} {ok}
+
+do_execsql_test 1.7 {
+  BEGIN;
+    DROP TABLE t1;
+    CREATE TABLE t1(x);
+    INSERT INTO t1 VALUES('a');
+  COMMIT;
+  CREATE INDEX i1 ON t1(x); 
+  PRAGMA integrity_check
+} {ok}
+
+do_execsql_test 1.8 {
+  BEGIN;
+    DROP TABLE t1;
+    CREATE TABLE t1(x);
+  COMMIT;
+  CREATE INDEX i1 ON t1(x); 
+  PRAGMA integrity_check
+} {ok}
+
+do_execsql_test 2.1 {
+  BEGIN;
+    CREATE TABLE t2(x);
+    INSERT INTO t2 VALUES(14);
+    INSERT INTO t2 VALUES(35);
+    INSERT INTO t2 VALUES(15);
+    INSERT INTO t2 VALUES(35);
+    INSERT INTO t2 VALUES(16);
+  COMMIT;
+}
+do_catchsql_test 2.2 {
+  CREATE UNIQUE INDEX i3 ON t2(x);
+} {1 {indexed columns are not unique}}
+
+
+finish_test
diff --git a/test/indexfault.test b/test/indexfault.test
new file mode 100644
index 00000000..efe49321
--- /dev/null
+++ b/test/indexfault.test
@@ -0,0 +1,342 @@
+# 2011 August 08
+#
+# The author disclaims copyright to this source code.  In place of
+# a legal notice, here is a blessing:
+#
+#    May you do good and not evil.
+#    May you find forgiveness for yourself and forgive others.
+#    May you share freely, never taking more than you give.
+#
+#***********************************************************************
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+source $testdir/lock_common.tcl
+source $testdir/malloc_common.tcl
+
+ifcapable !mergesort {
+  finish_test
+  return
+}
+
+set testprefix indexfault
+
+# Set up the custom fault-injector. This is further configured by using
+# different values for $::custom_filter and different implementations
+# of Tcl proc [xCustom] for each test case.
+#
+proc install_custom_faultsim {} {
+  set ::FAULTSIM(custom)            [list      \
+    -injectinstall   custom_injectinstall    \
+    -injectstart     custom_injectstart      \
+    -injectstop      custom_injectstop       \
+    -injecterrlist   {{1 {disk I/O error}}}  \
+    -injectuninstall custom_injectuninstall  \
+  ]
+  proc custom_injectinstall {} {
+    testvfs shmfault -default true
+    shmfault filter $::custom_filter
+    shmfault script xCustom
+  }
+  proc custom_injectuninstall {} {
+    catch {db  close}
+    catch {db2 close}
+    shmfault delete
+  }
+  set ::custom_ifail -1
+  set ::custom_nfail -1
+  proc custom_injectstart {iFail} {
+    set ::custom_ifail $iFail
+    set ::custom_nfail 0
+  }
+  proc custom_injectstop {} {
+    set ::custom_ifail -1
+    return $::custom_nfail
+  }
+}
+proc uninstall_custom_faultsim {} {
+  unset -nocomplain ::FAULTSIM(custom)
+}
+
+
+#-------------------------------------------------------------------------
+# These tests - indexfault-1.* - Build an index on a smallish table with
+# all different kinds of fault-injection. The CREATE INDEX is run once
+# with default options and once with a 50KB soft-heap-limit.
+#
+do_execsql_test 1.0 {
+  BEGIN;
+    CREATE TABLE t1(x);
+    INSERT INTO t1 VALUES(randomblob(202));
+    INSERT INTO t1 SELECT randomblob(202) FROM t1;     --     2
+    INSERT INTO t1 SELECT randomblob(202) FROM t1;     --     4
+    INSERT INTO t1 SELECT randomblob(202) FROM t1;     --     8
+    INSERT INTO t1 SELECT randomblob(202) FROM t1;     --    16
+    INSERT INTO t1 SELECT randomblob(202) FROM t1;     --    32
+    INSERT INTO t1 SELECT randomblob(202) FROM t1;     --    64
+    INSERT INTO t1 SELECT randomblob(202) FROM t1;     --   128
+    INSERT INTO t1 SELECT randomblob(202) FROM t1;     --   256
+  COMMIT;
+}
+faultsim_save_and_close
+
+do_faultsim_test 1.1 -prep {
+  faultsim_restore_and_reopen
+} -body {
+  execsql { CREATE INDEX i1 ON t1(x) }
+  faultsim_test_result {0 {}} 
+  faultsim_integrity_check
+}
+ifcapable memorymanage {
+  set soft_limit [sqlite3_soft_heap_limit 50000]
+  do_faultsim_test 2.1 -prep {
+    faultsim_restore_and_reopen
+  } -body {
+    execsql { CREATE INDEX i1 ON t1(x) }
+    faultsim_test_result {0 {}} 
+  }
+  sqlite3_soft_heap_limit $soft_limit
+}
+
+#-------------------------------------------------------------------------
+# These are similar to the indexfault-1.* tests, except they create an
+# index with more than one column.
+#
+sqlite3 db test.db
+do_execsql_test 2.0 {
+  BEGIN;
+    DROP TABLE IF EXISTS t1;
+    CREATE TABLE t1(t,u,v,w,x,y,z);
+    INSERT INTO t1 VALUES(
+      randomblob(30), randomblob(30), randomblob(30), randomblob(30),
+      randomblob(30), randomblob(30), randomblob(30)
+    );
+    INSERT INTO t1 SELECT 
+      randomblob(30), randomblob(30), randomblob(30), randomblob(30),
+      randomblob(30), randomblob(30), randomblob(30) FROM t1;         -- 2
+    INSERT INTO t1 SELECT 
+      randomblob(30), randomblob(30), randomblob(30), randomblob(30),
+      randomblob(30), randomblob(30), randomblob(30) FROM t1;         -- 4
+    INSERT INTO t1 SELECT 
+      randomblob(30), randomblob(30), randomblob(30), randomblob(30),
+      randomblob(30), randomblob(30), randomblob(30) FROM t1;         -- 8
+    INSERT INTO t1 SELECT 
+      randomblob(30), randomblob(30), randomblob(30), randomblob(30),
+      randomblob(30), randomblob(30), randomblob(30) FROM t1;         -- 16
+    INSERT INTO t1 SELECT 
+      randomblob(30), randomblob(30), randomblob(30), randomblob(30),
+      randomblob(30), randomblob(30), randomblob(30) FROM t1;         -- 32
+    INSERT INTO t1 SELECT 
+      randomblob(30), randomblob(30), randomblob(30), randomblob(30),
+      randomblob(30), randomblob(30), randomblob(30) FROM t1;         -- 64
+    INSERT INTO t1 SELECT 
+      randomblob(30), randomblob(30), randomblob(30), randomblob(30),
+      randomblob(30), randomblob(30), randomblob(30) FROM t1;         -- 128
+  COMMIT;
+}
+faultsim_save_and_close
+
+do_faultsim_test 2.1 -prep {
+  faultsim_restore_and_reopen
+} -body {
+  execsql { CREATE INDEX i1 ON t1(t,u,v,w,x,y,z) }
+  faultsim_test_result {0 {}} 
+  faultsim_integrity_check
+}
+ifcapable memorymanage {
+  set soft_limit [sqlite3_soft_heap_limit 50000]
+  do_faultsim_test 2.2 -prep {
+    faultsim_restore_and_reopen
+  } -body {
+    execsql { CREATE INDEX i1 ON t1(t,u,v,w,x,y,z) }
+    faultsim_test_result {0 {}} 
+  }
+  sqlite3_soft_heap_limit $soft_limit
+}
+
+#-------------------------------------------------------------------------
+# The following tests - indexfault-2.* - all attempt to build a index
+# on table t1 in the main database with injected IO errors. Individual
+# test cases work as follows:
+#
+#   3.1: IO errors injected into xOpen() calls.
+#   3.2: As 7.1, but with a low (50KB) soft-heap-limit.
+#
+#   3.3: IO errors injected into the first 200 write() calls made on the
+#        second temporary file.
+#   3.4: As 7.3, but with a low (50KB) soft-heap-limit.
+#
+#   3.5: After a certain amount of data has been read from the main database
+#        file (and written into the temporary b-tree), sqlite3_release_memory()
+#        is called to free as much memory as possible. This causes the temp
+#        b-tree to be flushed to disk. So that before its contents can be 
+#        transfered to a PMA they must be read back from disk - creating extra
+#        opportunities for IO errors.
+#
+install_custom_faultsim
+
+# Set up a table to build indexes on. Save the setup using the 
+# [faultsim_save_and_close] mechanism.
+# 
+sqlite3 db test.db
+do_execsql_test 3.0 {
+  BEGIN;
+    DROP TABLE IF EXISTS t1;
+    CREATE TABLE t1(x);
+    INSERT INTO t1 VALUES(randomblob(11000));
+    INSERT INTO t1 SELECT randomblob(11001) FROM t1;     --     2
+    INSERT INTO t1 SELECT randomblob(11002) FROM t1;     --     4
+    INSERT INTO t1 SELECT randomblob(11003) FROM t1;     --     8
+    INSERT INTO t1 SELECT randomblob(11004) FROM t1;     --    16
+    INSERT INTO t1 SELECT randomblob(11005) FROM t1;     --    32
+    INSERT INTO t1 SELECT randomblob(11006) FROM t1;     --    64
+    INSERT INTO t1 SELECT randomblob(11007) FROM t1;     --   128
+    INSERT INTO t1 SELECT randomblob(11008) FROM t1;     --   256
+    INSERT INTO t1 SELECT randomblob(11009) FROM t1;     --   512
+  COMMIT;
+}
+faultsim_save_and_close
+
+set ::custom_filter xOpen
+proc xCustom {args} {
+  incr ::custom_ifail -1
+  if {$::custom_ifail==0} {
+    incr ::custom_nfail
+    return "SQLITE_IOERR"
+  }
+  return "SQLITE_OK"
+}
+do_faultsim_test 3.1 -faults custom -prep {
+  faultsim_restore_and_reopen
+} -body {
+  execsql { CREATE INDEX i1 ON t1(x) }
+  faultsim_test_result {0 {}} 
+}
+ifcapable memorymanage {
+  set soft_limit [sqlite3_soft_heap_limit 50000]
+  do_faultsim_test 3.2 -faults custom -prep {
+    faultsim_restore_and_reopen
+  } -body {
+    execsql { CREATE INDEX i1 ON t1(x) }
+    faultsim_test_result {0 {}} 
+  }
+  sqlite3_soft_heap_limit $soft_limit
+}
+
+set ::custom_filter {xOpen xWrite}
+proc xCustom {method args} {
+  if {$method == "xOpen"} {
+    if {[lindex $args 0] == ""} {
+      incr ::nTmpOpen 1
+      if {$::nTmpOpen == 3} { return "failme" }
+    }
+    return "SQLITE_OK"
+  }
+  if {$::custom_ifail<200 && [lindex $args 1] == "failme"} {
+    incr ::custom_ifail -1
+    if {$::custom_ifail==0} {
+      incr ::custom_nfail
+      return "SQLITE_IOERR"
+    }
+  }
+  return "SQLITE_OK"
+}
+
+do_faultsim_test 3.3 -faults custom -prep {
+  faultsim_restore_and_reopen
+  set ::nTmpOpen 0
+} -body {
+  execsql { CREATE INDEX i1 ON t1(x) }
+  faultsim_test_result {0 {}} 
+}
+
+ifcapable memorymanage {
+  set soft_limit [sqlite3_soft_heap_limit 50000]
+  do_faultsim_test 3.4 -faults custom -prep {
+    faultsim_restore_and_reopen
+    set ::nTmpOpen 0
+  } -body {
+    execsql { CREATE INDEX i1 ON t1(x) }
+    faultsim_test_result {0 {}} 
+  }
+  sqlite3_soft_heap_limit $soft_limit
+}
+
+uninstall_custom_faultsim
+
+#-------------------------------------------------------------------------
+# Test 4: After a certain amount of data has been read from the main database
+# file (and written into the temporary b-tree), sqlite3_release_memory() is
+# called to free as much memory as possible. This causes the temp b-tree to be
+# flushed to disk. So that before its contents can be transfered to a PMA they
+# must be read back from disk - creating extra opportunities for IO errors.
+# 
+install_custom_faultsim
+
+catch { db close }
+forcedelete test.db
+sqlite3 db test.db
+
+do_execsql_test 4.0 {
+  BEGIN;
+    DROP TABLE IF EXISTS t1;
+    CREATE TABLE t1(x);
+    INSERT INTO t1 VALUES(randomblob(11000));
+    INSERT INTO t1 SELECT randomblob(11001) FROM t1;     --     2
+    INSERT INTO t1 SELECT randomblob(11002) FROM t1;     --     4
+    INSERT INTO t1 SELECT randomblob(11003) FROM t1;     --     8
+    INSERT INTO t1 SELECT randomblob(11004) FROM t1;     --    16
+    INSERT INTO t1 SELECT randomblob(11005) FROM t1;     --    32
+    INSERT INTO t1 SELECT randomblob(11005) FROM t1;     --    64
+  COMMIT;
+}
+faultsim_save_and_close
+
+testvfs tvfs 
+tvfs script xRead
+tvfs filter xRead
+set ::nRead 0
+proc xRead {method file args} {
+  if {[file tail $file] == "test.db"} { incr ::nRead }
+}
+
+do_test 4.1 {
+  sqlite3 db test.db -vfs tvfs
+  execsql { CREATE INDEX i1 ON t1(x) }
+} {}
+
+db close
+tvfs delete
+
+set ::custom_filter xRead
+proc xCustom {method file args} {
+  incr ::nReadCall
+  if {$::nReadCall >= ($::nRead/5)} {
+    if {$::nReadCall == ($::nRead/5)} {
+      set nByte [sqlite3_release_memory [expr 64*1024*1024]]
+      sqlite3_soft_heap_limit 20000
+    }
+    if {$file == ""} {
+      incr ::custom_ifail -1
+      if {$::custom_ifail==0} {
+        incr ::custom_nfail
+        return "SQLITE_IOERR"
+      }
+    }
+  }
+  return "SQLITE_OK"
+}
+
+do_faultsim_test 4.2 -faults custom -prep {
+  faultsim_restore_and_reopen
+  set ::nReadCall 0
+  sqlite3_soft_heap_limit 0
+} -body {
+  execsql { CREATE INDEX i1 ON t1(x) }
+  faultsim_test_result {0 {}} 
+}
+
+uninstall_custom_faultsim
+
+finish_test
diff --git a/test/insert4.test b/test/insert4.test
index 44b428a1..cb02b9dc 100644
--- a/test/insert4.test
+++ b/test/insert4.test
@@ -112,7 +112,7 @@ do_test insert4-2.4.1 {
     INSERT INTO t3 SELECT DISTINCT * FROM t2;
     SELECT * FROM t3;
   }
-} {1 9 9 1}
+} {9 1 1 9}
 xferopt_test insert4-2.4.2 0
 do_test insert4-2.4.3 {
   catchsql {
diff --git a/test/insert5.test b/test/insert5.test
index e48c2c32..1e58902e 100644
--- a/test/insert5.test
+++ b/test/insert5.test
@@ -34,7 +34,7 @@ proc uses_temp_table {sql} {
 # Construct the sample database.
 #
 do_test insert5-1.0 {
-  file delete -force test2.db test2.db-journal
+  forcedelete test2.db test2.db-journal
   execsql {
     CREATE TABLE MAIN(Id INTEGER, Id1 INTEGER); 
     CREATE TABLE B(Id INTEGER, Id1 INTEGER); 
diff --git a/test/io.test b/test/io.test
index 0cc26eff..58caeeeb 100644
--- a/test/io.test
+++ b/test/io.test
@@ -225,7 +225,7 @@ do_test io-2.6.2 {
   }
 } {1 {unable to open database file}}
 do_test io-2.6.3 {
-  file delete -force test.db-journal
+  forcedelete test.db-journal
   catchsql { COMMIT }
 } {0 {}}
 do_test io-2.6.4 {
@@ -237,7 +237,7 @@ do_test io-2.6.4 {
 # is created during execution of the COMMIT statement, so we have to
 # use the same technique to check that it is created as in the above 
 # block.
-file delete -force test2.db test2.db-journal
+forcedelete test2.db test2.db-journal
 ifcapable attach {
   do_test io-2.7.1 {
     execsql {
@@ -261,7 +261,7 @@ ifcapable attach {
     catchsql { COMMIT }
   } {1 {unable to open database file}}
   do_test io-2.7.5 {
-    file delete -force test2.db-journal
+    forcedelete test2.db-journal
     catchsql { COMMIT }
   } {1 {cannot commit - no transaction is active}}
   do_test io-2.7.6 {
@@ -304,7 +304,7 @@ do_test io-2.9.1 {
 do_test io-2.9.2 {
   execsql { ROLLBACK; }
   db close
-  file delete -force test.db test.db-journal
+  forcedelete test.db test.db-journal
   sqlite3 db test.db -vfs devsym
   execsql {
     PRAGMA auto_vacuum = OFF;
@@ -375,7 +375,7 @@ sqlite3_simulate_device -char sequential -sectorsize 0
 ifcapable pager_pragmas {
   do_test io-3.1 {
     db close
-    file delete -force test.db test.db-journal
+    forcedelete test.db test.db-journal
     sqlite3 db test.db -vfs devsym
     db eval {
       PRAGMA auto_vacuum=OFF;
@@ -544,7 +544,7 @@ foreach {char                 sectorsize pgsize} {
   incr tn
   if {$pgsize>$::SQLITE_MAX_PAGE_SIZE} continue
   db close
-  file delete -force test.db test.db-journal
+  forcedelete test.db test.db-journal
   sqlite3_simulate_device -char $char -sectorsize $sectorsize
   sqlite3 db test.db -vfs devsym
   db eval {
diff --git a/test/ioerr.test b/test/ioerr.test
index f9b95555..b237439e 100644
--- a/test/ioerr.test
+++ b/test/ioerr.test
@@ -183,8 +183,8 @@ if {$tcl_platform(platform)!="windows"} {
       BEGIN;
       INSERT INTO t1 VALUES(3, 4);
     }
-    copy_file test2.db test.db
-    copy_file test2.db-journal test.db-journal
+    forcecopy test2.db test.db
+    forcecopy test2.db-journal test.db-journal
     db2 close
   } -tclbody {
     sqlite3 db test.db
@@ -219,11 +219,11 @@ if {$tcl_platform(platform)=="unix"} {
       BEGIN;
       INSERT INTO t1 VALUES(randstr(200,200), randstr(1000,1000), 2);
     }
-    copy_file test.db-journal test2.db-journal
+    forcecopy test.db-journal test2.db-journal
     execsql {
       COMMIT;
     }
-    copy_file test2.db-journal test.db-journal
+    forcecopy test2.db-journal test.db-journal
     set f [open test.db-journal a]
     fconfigure $f -encoding binary
     puts -nonewline $f "hello"
diff --git a/test/ioerr4.test b/test/ioerr4.test
index 3a74a88a..defa3268 100644
--- a/test/ioerr4.test
+++ b/test/ioerr4.test
@@ -31,7 +31,7 @@ do_test ioerr4-1.1 {
   set ::enable_shared_cache [sqlite3_enable_shared_cache 1]
 } {0}
 do_test ioerr4-1.2 {
-  file delete -force test.db test.db-journal
+  forcedelete test.db test.db-journal
   sqlite3 db test.db
   sqlite3 db2 test.db
   db eval {
@@ -79,12 +79,12 @@ do_test ioerr4-1.6 {
 #
 db close
 db2 close
-file copy -force test.db test.db-bu
+forcecopy test.db test.db-bu
 do_ioerr_test ioerr4-2 -tclprep {
   catch {db2 close}
   db close
-  file delete -force test.db test.db-journal
-  file copy -force test.db-bu test.db
+  forcedelete test.db test.db-journal
+  forcecopy test.db-bu test.db
   sqlite3_enable_shared_cache 1
   set ::DB [sqlite3 db test.db; sqlite3_connection_pointer db]
   db eval {PRAGMA auto_vacuum=INCREMENTAL}
@@ -94,7 +94,7 @@ do_ioerr_test ioerr4-2 -tclprep {
 }
 
 db2 close
-file delete -force test.db-bu
+forcedelete test.db-bu
 sqlite3_enable_shared_cache $::enable_shared_cache
 
 finish_test
diff --git a/test/journal1.test b/test/journal1.test
index a1b17b41..2fdadfd6 100644
--- a/test/journal1.test
+++ b/test/journal1.test
@@ -20,7 +20,7 @@ set testdir [file dirname $argv0]
 source $testdir/tester.tcl
 
 # These tests will not work on windows because windows uses
-# manditory file locking which breaks the file copy command.
+# manditory file locking which breaks the copy_file command.
 #
 if {$tcl_platform(platform)=="windows"} {
   finish_test
@@ -51,13 +51,13 @@ do_test journal1-1.2 {
     BEGIN;
     DELETE FROM t1;
   }
-  file copy -force test.db-journal test.db-journal-bu
+  forcecopy test.db-journal test.db-journal-bu
   execsql {
     ROLLBACK;
   }
   db close
-  file delete test.db
-  file copy test.db-journal-bu test.db-journal
+  delete_file test.db
+  copy_file test.db-journal-bu test.db-journal
   sqlite3 db test.db
   catchsql {
     SELECT * FROM sqlite_master
diff --git a/test/journal2.test b/test/journal2.test
index 2b5d8fa8..25ce9416 100644
--- a/test/journal2.test
+++ b/test/journal2.test
@@ -167,7 +167,7 @@ do_test journal2-1.13 {
 } {1 {disk I/O error}}
 db2 close
 unset ::tvfs_error_on_write
-file copy -force test.db testX.db
+forcecopy test.db testX.db
 
 do_test journal2-1.14 { file exists test.db-journal } 1
 do_test journal2-1.15 {
diff --git a/test/journal3.test b/test/journal3.test
index 7d297222..f1bf89f8 100644
--- a/test/journal3.test
+++ b/test/journal3.test
@@ -35,7 +35,7 @@ if {$::tcl_platform(platform) == "unix"} {
     db close
     set effective [format %.5o [expr $permissions & ~$umask]]
     do_test journal3-1.2.$tn.1 {
-      catch { file delete -force test.db-journal }
+      catch { forcedelete test.db-journal }
       file attributes test.db -permissions $permissions
       file attributes test.db -permissions
     } $permissions
diff --git a/test/jrnlmode.test b/test/jrnlmode.test
index eab74d65..b1007c49 100644
--- a/test/jrnlmode.test
+++ b/test/jrnlmode.test
@@ -200,7 +200,7 @@ ifcapable attach {
 }
 
 ifcapable attach {
-  file delete -force test2.db
+  forcedelete test2.db
   do_test jrnlmode-2.1 {
     execsql {
       ATTACH 'test2.db' AS aux;
@@ -242,8 +242,8 @@ ifcapable attach {
 # Test caes jrnlmode-3.X verify that ticket #3127 has been fixed.
 #
   db close
-  file delete -force test2.db
-  file delete -force test.db
+  forcedelete test2.db
+  forcedelete test.db
   sqlite3 db test.db
 
   do_test jrnlmode-3.1 {
@@ -270,7 +270,7 @@ ifcapable attach {
 
 ifcapable autovacuum&&pragma {
   db close
-  file delete -force test.db
+  forcedelete test.db
   sqlite3 db test.db
   do_test jrnlmode-4.1 {
     execsql {
@@ -303,7 +303,7 @@ ifcapable autovacuum&&pragma {
 # pragma.
 ifcapable pragma {
   db close
-  file delete -force test.db test2.db test3.db
+  forcedelete test.db test2.db test3.db
   sqlite3 db test.db
 
   do_test jrnlmode-5.1 {
@@ -511,7 +511,7 @@ ifcapable pragma {
 ifcapable pragma {
   catch { db close }
   do_test jrnlmode-7.1 {
-    foreach f [glob -nocomplain test.db*] { file delete -force $f }
+    foreach f [glob -nocomplain test.db*] { forcedelete $f }
     sqlite3 db test.db
     execsql {
       PRAGMA journal_mode = memory;
diff --git a/test/jrnlmode2.test b/test/jrnlmode2.test
index dc3bc270..6ea87d70 100644
--- a/test/jrnlmode2.test
+++ b/test/jrnlmode2.test
@@ -112,7 +112,7 @@ do_test jrnlmode2-2.4 {
 
 do_test jrnlmode2-2.5 {
   db close
-  file delete test.db-journal
+  delete_file test.db-journal
 } {}
 do_test jrnlmode2-2.6 {
   sqlite3 db2 test.db -readonly 1
diff --git a/test/jrnlmode3.test b/test/jrnlmode3.test
index 6ae1346e..43da6579 100644
--- a/test/jrnlmode3.test
+++ b/test/jrnlmode3.test
@@ -48,7 +48,7 @@ do_test jrnlmode3-1.2 {
 } {1}
 
 db close
-file delete -force test.db test.db-journal
+forcedelete test.db test.db-journal
 sqlite3 db test.db
 
 do_test jrnlmode3-2.1 {
@@ -85,7 +85,7 @@ foreach fromjmode $all_journal_modes {
     # Start with a fresh database connection an empty database file.
     #
     db close
-    file delete -force test.db test.db-journal
+    forcedelete test.db test.db-journal
     sqlite3 db test.db
 
     # Initialize the journal mode.
diff --git a/test/like.test b/test/like.test
index bd9a6c39..767efd58 100644
--- a/test/like.test
+++ b/test/like.test
@@ -70,12 +70,15 @@ do_test like-1.4 {
   }
 } {ABC abc}
 do_test like-1.5.1 {
+  # Use sqlite3_exec() to verify fix for ticket [25ee81271091] 2011-06-26
+  sqlite3_exec db {PRAGMA case_sensitive_like=on}
+} {0 {}}
+do_test like-1.5.2 {
   execsql {
-    PRAGMA case_sensitive_like=on;
     SELECT x FROM t1 WHERE x LIKE 'abc' ORDER BY 1;
   }
 } {abc}
-do_test like-1.5.2 {
+do_test like-1.5.3 {
   execsql {
     PRAGMA case_sensitive_like; -- no argument; does not change setting
     SELECT x FROM t1 WHERE x LIKE 'abc' ORDER BY 1;
@@ -305,8 +308,8 @@ do_test like-3.18 {
 #
 do_test like-3.19 {
   set sqlite_like_count 0
+  db eval {CREATE INDEX i1 ON t1(x);}
   queryplan {
-    CREATE INDEX i1 ON t1(x);
     SELECT x FROM t1 WHERE x GLOB 'abc*' ORDER BY 1;
   }
 } {abc abcd nosort {} i1}
@@ -519,7 +522,7 @@ do_test like-5.24 {
   }
 } {zz-lower-lower zZ-lower-upper Zz-upper-lower ZZ-upper-upper nosort {} i2}
 do_test like-5.25 {
-  queryplan {
+  db eval {
     PRAGMA case_sensitive_like=on;
     CREATE TABLE t3(x TEXT);
     CREATE INDEX i3 ON t3(x);
@@ -527,6 +530,8 @@ do_test like-5.25 {
     INSERT INTO t3 VALUES('zZ-lower-upper');
     INSERT INTO t3 VALUES('Zz-upper-lower');
     INSERT INTO t3 VALUES('zz-lower-lower');
+  }
+  queryplan {
     SELECT x FROM t3 WHERE x LIKE 'zz%';
   }
 } {zz-lower-lower nosort {} i3}
diff --git a/test/loadext.test b/test/loadext.test
index db5745b4..8f8339ec 100644
--- a/test/loadext.test
+++ b/test/loadext.test
@@ -134,7 +134,7 @@ sqlite3_enable_load_extension db 1
 # Try to load an extension for which the file does not exist.
 #
 do_test loadext-2.1 {
-  file delete -force ${testextension}xx
+  forcedelete ${testextension}xx
   set rc [catch {
     sqlite3_load_extension db "${testextension}xx"
   } msg]
diff --git a/test/lock4.test b/test/lock4.test
index 06ee88df..b0b1c74f 100644
--- a/test/lock4.test
+++ b/test/lock4.test
@@ -26,7 +26,7 @@ do_test lock4-1.1 {
      PRAGMA auto_vacuum=OFF;
      CREATE TABLE t1(x);
   }
-  file delete -force test2.db test2.db-journal
+  forcedelete test2.db test2.db-journal
   sqlite3 db2 test2.db
   db2 eval {
      PRAGMA auto_vacuum=OFF;
diff --git a/test/lock5.test b/test/lock5.test
index 6ec86ba7..f0d49550 100644
--- a/test/lock5.test
+++ b/test/lock5.test
@@ -24,7 +24,7 @@ if {[catch {sqlite3 db test.db -vfs unix-none} msg]} {
   return
 }
 db close
-file delete -force test.db.lock
+forcedelete test.db.lock
 
 ifcapable lock_proxy_pragmas {
   set ::using_proxy 0
@@ -100,7 +100,7 @@ do_test lock5-dotfile.X {
 
 #####################################################################
 
-file delete -force test.db
+forcedelete test.db
 if {[catch {sqlite3 db test.db -vfs unix-flock} msg]} {
   finish_test
   return
diff --git a/test/main.test b/test/main.test
index dbf90410..5bbc52b8 100644
--- a/test/main.test
+++ b/test/main.test
@@ -301,7 +301,7 @@ ifcapable {trigger} {
 if {[permutation] == ""} {
   do_test main-2.0 {
     catch {db close}
-    file delete -force test.db
+    forcedelete test.db
     set fd [open test.db w]
     puts $fd hi!
     close $fd
@@ -314,16 +314,16 @@ if {[permutation] == ""} {
 #
 do_test main-3.1 {
   catch {db close}
-  foreach f [glob -nocomplain testdb/*] {file delete -force $f}
-  file delete -force testdb
+  foreach f [glob -nocomplain testdb/*] {forcedelete $f}
+  forcedelete testdb
   sqlite3 db testdb
   set v [catch {execsql {SELECT * from T1 where x!!5}} msg]
   lappend v $msg
 } {1 {unrecognized token: "!!"}}
 do_test main-3.2 {
   catch {db close}
-  foreach f [glob -nocomplain testdb/*] {file delete -force $f}
-  file delete -force testdb
+  foreach f [glob -nocomplain testdb/*] {forcedelete $f}
+  forcedelete testdb
   sqlite3 db testdb
   set v [catch {execsql {SELECT * from T1 where ^x}} msg]
   lappend v $msg
@@ -442,8 +442,8 @@ do_test main-3.2.30 {
 
 do_test main-3.3 {
   catch {db close}
-  foreach f [glob -nocomplain testdb/*] {file delete -force $f}
-  file delete -force testdb
+  foreach f [glob -nocomplain testdb/*] {forcedelete $f}
+  forcedelete testdb
   sqlite3 db testdb
   execsql {
     create table T1(X REAL);  /* C-style comments allowed */
diff --git a/test/malloc.test b/test/malloc.test
index 9bd5314b..0d213d7b 100644
--- a/test/malloc.test
+++ b/test/malloc.test
@@ -270,7 +270,7 @@ do_malloc_test 9 -sqlprep {
 do_malloc_test 10 -tclprep {
   catch {db2 close}
   db close
-  file delete -force test.db test.db-journal
+  forcedelete test.db test.db-journal
   sqlite3 db test.db
   sqlite3_extended_result_codes db 1
   db eval {CREATE TABLE abc(a, b, c)}
@@ -341,8 +341,8 @@ if {$tcl_platform(platform)!="windows"} {
       BEGIN;
       INSERT INTO t1 VALUES(3, 4);
     }
-    copy_file test2.db test.db
-    copy_file test2.db-journal test.db-journal
+    forcecopy test2.db test.db
+    forcecopy test2.db-journal test.db-journal
     db2 close
   } -tclbody {
     sqlite3 db test.db
@@ -499,7 +499,7 @@ unset static_string
 ifcapable attach {
   do_malloc_test 20 -tclprep {
     db close
-    file delete -force test2.db test2.db-journal
+    forcedelete test2.db test2.db-journal
     sqlite3 db test2.db
     sqlite3_extended_result_codes db 1
     db eval {CREATE TABLE t1(x);}
@@ -867,32 +867,6 @@ if {[db eval {PRAGMA locking_mode}]!="exclusive"} {
   catch { db2 close }
 }
 
-ifcapable stat2&&utf16 {
-  do_malloc_test 38 -tclprep {
-    add_test_collate db 0 0 1
-    execsql {
-      ANALYZE;
-      CREATE TABLE t4(x COLLATE test_collate);
-      CREATE INDEX t4x ON t4(x);
-      INSERT INTO sqlite_stat2 VALUES('t4', 't4x', 0, 'aaa');
-      INSERT INTO sqlite_stat2 VALUES('t4', 't4x', 1, 'aaa');
-      INSERT INTO sqlite_stat2 VALUES('t4', 't4x', 2, 'aaa');
-      INSERT INTO sqlite_stat2 VALUES('t4', 't4x', 3, 'aaa');
-      INSERT INTO sqlite_stat2 VALUES('t4', 't4x', 4, 'aaa');
-      INSERT INTO sqlite_stat2 VALUES('t4', 't4x', 5, 'aaa');
-      INSERT INTO sqlite_stat2 VALUES('t4', 't4x', 6, 'aaa');
-      INSERT INTO sqlite_stat2 VALUES('t4', 't4x', 7, 'aaa');
-      INSERT INTO sqlite_stat2 VALUES('t4', 't4x', 8, 'aaa');
-      INSERT INTO sqlite_stat2 VALUES('t4', 't4x', 9, 'aaa');
-    }
-    db close
-    sqlite3 db test.db
-    sqlite3_db_config_lookaside db 0 0 0
-    add_test_collate db 0 0 1
-  } -sqlbody {
-    SELECT * FROM t4 AS t41, t4 AS t42 WHERE t41.x>'ddd' AND t42.x>'ccc'
-  }
-}
 
 # Test that if an OOM error occurs, aux-data is still correctly destroyed.
 # This test case was causing either a memory-leak or an assert() failure
diff --git a/test/malloc3.test b/test/malloc3.test
index 73d2d396..2dfde466 100644
--- a/test/malloc3.test
+++ b/test/malloc3.test
@@ -463,7 +463,7 @@ TEST 29 {
 
 # Test a simple multi-file transaction 
 #
-file delete -force test2.db
+forcedelete test2.db
 ifcapable attach {
   SQL {ATTACH 'test2.db' AS aux;}
   SQL {BEGIN}
@@ -650,7 +650,7 @@ run_test $::run_test_script 1
 
 # Close and reopen the db.
 db close
-file delete -force test.db test.db-journal test2.db test2.db-journal
+forcedelete test.db test.db-journal test2.db test2.db-journal
 sqlite3 db test.db
 sqlite3_extended_result_codes db 1
 set ::DB [sqlite3_connection_pointer db]
diff --git a/test/malloc5.test b/test/malloc5.test
index 73885b22..71f56bbb 100644
--- a/test/malloc5.test
+++ b/test/malloc5.test
@@ -219,7 +219,7 @@ do_test malloc5-4.2 {
   execsql {SELECT * FROM abc}
   set nMaxBytes [sqlite3_memory_highwater 1]
   puts -nonewline " (Highwater mark: $nMaxBytes) "
-  expr $nMaxBytes <= 100000
+  expr $nMaxBytes <= 110000
 } {1}
 do_test malloc5-4.3 {
   # Check that the content of table abc is at least roughly as expected.
@@ -275,7 +275,7 @@ proc nPage {db} {
   set stats(page)
 }
 db close
-file delete -force test.db test.db-journal test2.db test2.db-journal
+forcedelete test.db test.db-journal test2.db test2.db-journal
 
 # This block of test-cases (malloc5-6.1.*) prepares two database files
 # for the subsequent tests.
@@ -304,7 +304,7 @@ do_test malloc5-6.1.1 {
         SELECT randstr(50,50), randstr(75,75), randstr(100,100) FROM abc;
     COMMIT;
   } 
-  copy_file test.db test2.db
+  forcecopy test.db test2.db
   sqlite3 db2 test2.db
   list \
     [expr ([file size test.db]/1024)>20] [expr ([file size test2.db]/1024)>20]
diff --git a/test/mallocA.test b/test/mallocA.test
index 08f69302..89951276 100644
--- a/test/mallocA.test
+++ b/test/mallocA.test
@@ -27,7 +27,7 @@ if {!$MEMDEBUG} {
 
 # Construct a test database
 #
-file delete -force test.db.bu
+forcedelete test.db.bu
 db eval {
   CREATE TABLE t1(a COLLATE NOCASE,b,c);
   INSERT INTO t1 VALUES(1,2,3);
@@ -38,7 +38,7 @@ db eval {
   CREATE TABLE t2(x,y,z);
 }
 db close
-file copy test.db test.db.bu
+copy_file test.db test.db.bu
 
 
 do_malloc_test mallocA-1 -testdb test.db.bu -sqlbody {
@@ -74,5 +74,5 @@ do_test malloc-99.X {
   set sqlite_open_file_count
 } {0}
 
-file delete -force test.db.bu
+forcedelete test.db.bu
 finish_test
diff --git a/test/malloc_common.tcl b/test/malloc_common.tcl
index e7f61564..5937b958 100644
--- a/test/malloc_common.tcl
+++ b/test/malloc_common.tcl
@@ -408,7 +408,7 @@ proc do_malloc_test {tn args} {
       set zRepeat "transient"
       if {$::iRepeat} {set zRepeat "persistent"}
       restore_prng_state
-      foreach file [glob -nocomplain test.db-mj*] {file delete -force $file}
+      foreach file [glob -nocomplain test.db-mj*] {forcedelete $file}
 
       do_test ${tn}.${zRepeat}.${::n} {
   
@@ -425,7 +425,7 @@ proc do_malloc_test {tn args} {
         forcedelete test2.db-journal
         forcedelete test2.db-wal
         if {[info exists ::mallocopts(-testdb)]} {
-          file copy $::mallocopts(-testdb) test.db
+          copy_file $::mallocopts(-testdb) test.db
         }
         catch { sqlite3 db test.db }
         if {[info commands db] ne ""} {
diff --git a/test/manydb.test b/test/manydb.test
index b9a8eaf8..974a5b8e 100644
--- a/test/manydb.test
+++ b/test/manydb.test
@@ -44,7 +44,7 @@ foreach fd $filehandles {
   close $fd
 }
 catch {
-  file delete -force testfile.1
+  forcedelete testfile.1
 }
 set N [expr $i / $num_fd_per_openwrite_db]
 
@@ -92,7 +92,7 @@ for {set i 0} {$i<$N} {incr i} {
 for {set i 0} {$i<$N} {incr i} {
   do_test manydb-3.$i {
     db$i close
-    file delete -force $dbname($i)
+    forcedelete $dbname($i)
   } {}
 }
 
diff --git a/test/memsubsys1.test b/test/memsubsys1.test
index 3bb2cc71..7eecf083 100644
--- a/test/memsubsys1.test
+++ b/test/memsubsys1.test
@@ -32,7 +32,7 @@ if {[permutation] == "memsubsys1"} {
 #
 proc build_test_db {testname pragmas} {
   catch {db close}
-  file delete -force test.db test.db-journal
+  forcedelete test.db test.db-journal
   sqlite3 db test.db
   sqlite3_db_config_lookaside db 0 0 0
   db eval $pragmas
diff --git a/test/memsubsys2.test b/test/memsubsys2.test
index ec554775..a40f4e4f 100644
--- a/test/memsubsys2.test
+++ b/test/memsubsys2.test
@@ -24,7 +24,7 @@ sqlite3_reset_auto_extension
 #
 proc build_test_db {testname pragmas} {
   catch {db close}
-  file delete -force test.db test.db-journal
+  forcedelete test.db test.db-journal
   sqlite3 db test.db
   db eval $pragmas
   db eval {
diff --git a/test/misc1.test b/test/misc1.test
index a78e4884..e3f1b955 100644
--- a/test/misc1.test
+++ b/test/misc1.test
@@ -491,7 +491,7 @@ do_test misc1-14.2b {
 } {1}
 do_test misc1-14.3 {
   cd ..
-  file delete -force tempdir
+  forcedelete tempdir
   execsql {COMMIT}
   file exists ./test.db-journal
 } {0}
diff --git a/test/misc2.test b/test/misc2.test
index f6fc3833..bb544c5f 100644
--- a/test/misc2.test
+++ b/test/misc2.test
@@ -165,7 +165,7 @@ do_test misc2-6.1 {
 ifcapable tclvar {
   do_test misc2-7.1 {
     db close
-    file delete -force test.db
+    forcedelete test.db
     sqlite3 db test.db
     execsql {
       CREATE TABLE t1(x);
@@ -265,7 +265,7 @@ ifcapable tclvar {
   #
   do_test misc2-7.11 {
     db close
-    file delete -force test.db
+    forcedelete test.db
     sqlite3 db test.db
     execsql {
       CREATE TABLE t1(x);
@@ -361,7 +361,7 @@ ifcapable tclvar {
 }
 
 db close
-file delete -force test.db
+forcedelete test.db
 sqlite3 db test.db
 catchsql { pragma recursive_triggers = off } 
 
diff --git a/test/misc3.test b/test/misc3.test
index 94a43c43..81a8266b 100644
--- a/test/misc3.test
+++ b/test/misc3.test
@@ -270,7 +270,11 @@ ifcapable {explain} {
       CREATE UNIQUE INDEX ex1i1 ON ex1(a);
       EXPLAIN REINDEX;
     }]
-    regexp { IsUnique \d+ \d+ \d+ \d+ } $x
+    ifcapable mergesort {
+      regexp { SorterCompare \d+ \d+ \d+ } $x
+    } else {
+      regexp { IsUnique \d+ \d+ \d+ \d+ } $x
+    }
   } {1}
   if {[regexp {16} [db one {PRAGMA encoding}]]} {
     do_test misc3-6.11-utf16 {
diff --git a/test/misc5.test b/test/misc5.test
index 34b2284b..14ba44ea 100644
--- a/test/misc5.test
+++ b/test/misc5.test
@@ -505,7 +505,7 @@ ifcapable subquery {
       )  
       ORDER BY LOWER(artist) ASC;
     }
-  } {one}
+  } {two}
 }
 
 # Ticket #1370.  Do not overwrite small files (less than 1024 bytes)
@@ -514,7 +514,7 @@ ifcapable subquery {
 if {[permutation] == ""} {
   do_test misc5-4.1 {
     db close
-    file delete -force test.db
+    forcedelete test.db
     set fd [open test.db w]
     puts $fd "This is not really a database"
     close $fd
@@ -544,7 +544,7 @@ do_test misc5-5.4 {
 # a UNION ALL query causes an error, not a crash.
 #
 db close
-file delete -force test.db
+forcedelete test.db
 sqlite3 db test.db
 ifcapable subquery&&compound {
   do_test misc5-6.1 {
diff --git a/test/misc7.test b/test/misc7.test
index 7d2ba6e8..9dee3278 100644
--- a/test/misc7.test
+++ b/test/misc7.test
@@ -30,7 +30,7 @@ do_test misc7-3 {
 # Try to open a directory:
 #
 do_test misc7-4 {
-  file delete mydir
+  delete_file mydir
   file mkdir mydir
   set rc [catch {
     sqlite3 db2 ./mydir
@@ -41,7 +41,7 @@ do_test misc7-4 {
 # Try to open a file with a directory where its journal file should be.
 #
 do_test misc7-5 {
-  file delete mydir
+  delete_file mydir
   file mkdir mydir-journal
   sqlite3 db2 ./mydir
   catchsql {
@@ -152,8 +152,8 @@ db2 close
 # after the omit_readlock pragma has been exercised.
 #
 do_test misc7-7.1 {
-  file delete -force test2.db
-  file delete -force test2.db-journal
+  forcedelete test2.db
+  forcedelete test2.db-journal
   execsql {
     PRAGMA omit_readlock = 1;
     ATTACH 'test2.db' AS aux;
@@ -254,8 +254,8 @@ ifcapable vtab {
 }
 
 db close
-file delete -force test.db
-file delete -force test.db-journal
+forcedelete test.db
+forcedelete test.db-journal
 sqlite3 db test.db
 
 ifcapable explain {
@@ -278,8 +278,8 @@ ifcapable explain {
 }
 
 db close
-file delete -force test.db
-file delete -force test.db-journal
+forcedelete test.db
+forcedelete test.db-journal
 sqlite3 db test.db
 
 #--------------------------------------------------------------------
@@ -323,8 +323,8 @@ do_test misc7-15.2 {
 } {}
 
 db close
-file delete -force test.db
-file delete -force test.db-journal
+forcedelete test.db
+forcedelete test.db-journal
 sqlite3 db test.db
 
 do_ioerr_test misc7-16 -sqlprep {
@@ -385,15 +385,15 @@ if {$tcl_platform(platform)!="windows" && $tcl_platform(platform)!="os2"} {
         BEGIN;
         DELETE FROM t3 WHERE (oid%3)==0;
       }
-      copy_file test.db bak.db
-      copy_file test.db-journal bak.db-journal
+      forcecopy test.db bak.db
+      forcecopy test.db-journal bak.db-journal
       execsql {
         COMMIT;
       }
     
       db close
-      copy_file bak.db test.db
-      copy_file bak.db-journal test.db-journal
+      forcecopy bak.db test.db
+      forcecopy bak.db-journal test.db-journal
       sqlite3 db test.db
     
       catch {file attributes test.db-journal -permissions r--------}
@@ -484,6 +484,6 @@ do_test misc7-21.1 {
 
 
 db close
-file delete -force test.db
+forcedelete test.db
 
 finish_test
diff --git a/test/misuse.test b/test/misuse.test
index 3734aa01..71ee0118 100644
--- a/test/misuse.test
+++ b/test/misuse.test
@@ -39,8 +39,8 @@ proc catchsql2 {sql} {
 #
 do_test misuse-1.1 {
   db close
-  catch {file delete -force test2.db}
-  catch {file delete -force test2.db-journal}
+  catch {forcedelete test2.db}
+  catch {forcedelete test2.db-journal}
   sqlite3 db test2.db; set ::DB [sqlite3_connection_pointer db]
   execsql {
     CREATE TABLE t1(a,b);
diff --git a/test/multiplex.test b/test/multiplex.test
index 9278e842..3abdcf45 100644
--- a/test/multiplex.test
+++ b/test/multiplex.test
@@ -49,6 +49,7 @@ proc multiplex_set {db name chunk_size max_chunks} {
 # and files with the chunk extension.
 proc multiplex_delete {name} {
   global g_max_chunks
+  forcedelete $name
   for {set i 0} {$i<$g_max_chunks} {incr i} {
     forcedelete [multiplex_name $name $i]
     forcedelete [multiplex_name $name-journal $i]
@@ -78,10 +79,9 @@ do_test multiplex-1.8 { sqlite3_multiplex_shutdown }               {SQLITE_OK}
 do_test multiplex-1.9.1  { sqlite3_multiplex_initialize "" 1 }     {SQLITE_OK}
 do_test multiplex-1.9.2  { sqlite3 db test.db }                    {}
 do_test multiplex-1.9.3  { multiplex_set db main 32768 16 }        {SQLITE_OK}
-do_test multiplex-1.9.4  { multiplex_set db main 32768 -1 }        {SQLITE_MISUSE}
-do_test multiplex-1.9.5  { multiplex_set db main -1 16 }           {SQLITE_MISUSE}
+do_test multiplex-1.9.4  { multiplex_set db main 32768 -1 }        {SQLITE_OK}
 do_test multiplex-1.9.6  { multiplex_set db main 31 16 }           {SQLITE_OK}
-do_test multiplex-1.9.7  { multiplex_set db main 32768 100 }       {SQLITE_MISUSE}
+do_test multiplex-1.9.7  { multiplex_set db main 32768 100 }       {SQLITE_OK}
 do_test multiplex-1.9.8  { multiplex_set db main 1073741824 1 }    {SQLITE_OK}
 do_test multiplex-1.9.9  { db close }                              {}
 do_test multiplex-1.9.10 { sqlite3_multiplex_shutdown }            {SQLITE_OK}
@@ -89,10 +89,9 @@ do_test multiplex-1.9.10 { sqlite3_multiplex_shutdown }            {SQLITE_OK}
 do_test multiplex-1.10.1  { sqlite3_multiplex_initialize "" 1 }                                  {SQLITE_OK}
 do_test multiplex-1.10.2  { sqlite3 db test.db }                                                 {}
 do_test multiplex-1.10.3  { lindex [ catchsql { SELECT multiplex_control(2, 32768); } ] 0 }      {0}
-do_test multiplex-1.10.4  { lindex [ catchsql { SELECT multiplex_control(3, -1); } ] 0 }         {1}
-do_test multiplex-1.10.5  { lindex [ catchsql { SELECT multiplex_control(2, -1); } ] 0 }         {1}
+do_test multiplex-1.10.4  { lindex [ catchsql { SELECT multiplex_control(3, -1); } ] 0 }         {0}
 do_test multiplex-1.10.6  { lindex [ catchsql { SELECT multiplex_control(2, 31); } ] 0 }         {0}
-do_test multiplex-1.10.7  { lindex [ catchsql { SELECT multiplex_control(3, 100); } ] 0 }        {1}
+do_test multiplex-1.10.7  { lindex [ catchsql { SELECT multiplex_control(3, 100); } ] 0 }        {0}
 do_test multiplex-1.10.8  { lindex [ catchsql { SELECT multiplex_control(2, 1073741824); } ] 0 } {0}
 do_test multiplex-1.10.9  { db close }                                                           {}
 do_test multiplex-1.10.10 { sqlite3_multiplex_shutdown }                                         {SQLITE_OK}
@@ -146,8 +145,9 @@ do_test multiplex-1.13.7  { sqlite3_multiplex_shutdown }
 sqlite3_multiplex_initialize "" 1
 multiplex_set db main 32768 16
 
+forcedelete test.x
 do_test multiplex-2.1.2 {
-  sqlite3 db test.db
+  sqlite3 db test.x
   execsql {
     PRAGMA page_size=1024;
     PRAGMA auto_vacuum=OFF;
@@ -159,7 +159,7 @@ do_test multiplex-2.1.2 {
     INSERT INTO t1 VALUES(2, randomblob(1100));
   }
 } {}
-do_test multiplex-2.1.3 { file size [multiplex_name test.db 0] } {4096}
+do_test multiplex-2.1.3 { file size [multiplex_name test.x 0] } {4096}
 do_test multiplex-2.1.4 {
   execsql { INSERT INTO t1 VALUES(3, randomblob(1100)) }
 } {}
@@ -167,10 +167,10 @@ do_test multiplex-2.1.4 {
 do_test multiplex-2.2.1 {
   execsql { INSERT INTO t1 VALUES(3, randomblob(1100)) }
 } {}
-do_test multiplex-2.2.3 { file size [multiplex_name test.db 0] } {6144}
+do_test multiplex-2.2.3 { file size [multiplex_name test.x 0] } {6144}
 
 do_test multiplex-2.3.1 {
-  sqlite3 db2 test2.db
+  sqlite3 db2 test2.x
   db2 close
 } {}
 
@@ -181,7 +181,7 @@ do_test multiplex-2.4.1 {
 do_test multiplex-2.4.2 {
   execsql { INSERT INTO t1 VALUES(3, randomblob(1100)) }
 } {}
-do_test multiplex-2.4.4 { file size [multiplex_name test.db 0] } {7168}
+do_test multiplex-2.4.4 { file size [multiplex_name test.x 0] } {7168}
 do_test multiplex-2.4.99 {
   db close
   sqlite3_multiplex_shutdown
@@ -189,9 +189,9 @@ do_test multiplex-2.4.99 {
 
 
 do_test multiplex-2.5.1 {
-  multiplex_delete test.db
+  multiplex_delete test.x
   sqlite3_multiplex_initialize "" 1
-  sqlite3 db test.db
+  sqlite3 db test.x
   multiplex_set db main 4096 16
 } {SQLITE_OK}
 
@@ -236,8 +236,8 @@ do_test multiplex-2.5.8 {
   db eval {SELECT a,length(b) FROM t1 WHERE a=4}
 } {4 4000}
 
-do_test multiplex-2.5.9 { file size [multiplex_name test.db 0] } [list $g_chunk_size]
-do_test multiplex-2.5.10 { file size [multiplex_name test.db 1] } [list $g_chunk_size]
+do_test multiplex-2.5.9 { file size [multiplex_name test.x 0] } [list $g_chunk_size]
+do_test multiplex-2.5.10 { file size [multiplex_name test.x 1] } [list $g_chunk_size]
 
 do_test multiplex-2.5.99 {
   db close
@@ -514,7 +514,7 @@ do_test multiplex-5.4.1 {
   file mkdir test.db
   list [catch { sqlite3 db test.db } msg] $msg
 } {1 {unable to open database file}}
-catch { file delete test.db }
+catch { delete_file test.db }
 
 do_faultsim_test multiplex-5.5 -prep {
   catch { sqlite3_multiplex_shutdown }
@@ -523,50 +523,6 @@ do_faultsim_test multiplex-5.5 -prep {
   multiplex_set db main 32768 16
 }
 
-# test that mismatch filesize is detected
-#
-# Do not run this test if $::G(perm:presql) is set. If it is set, then the
-# expected IO error will occur within the Tcl [sqlite3] wrapper, not within
-# the first SQL statement executed below. This breaks the test case.
-#
-if {0==[info exists ::G(perm:presql)] || $::G(perm:presql) == ""} {
-  set all_journal_modes {delete persist truncate memory off}
-  foreach jmode $all_journal_modes {
-    do_test multiplex-5.6.1.$jmode {
-      sqlite3_multiplex_shutdown
-      multiplex_delete test.db
-      sqlite3 db test.db
-      db eval {
-        PRAGMA page_size = 1024;
-        PRAGMA auto_vacuum = off;
-      }
-      db eval "PRAGMA journal_mode = $jmode;"
-    } $jmode
-    do_test multiplex-5.6.2.$jmode {
-      execsql {
-        CREATE TABLE t1(a, b);
-        INSERT INTO t1 VALUES(1, randomblob(15000));
-        INSERT INTO t1 VALUES(2, randomblob(15000));
-        INSERT INTO t1 VALUES(3, randomblob(15000));
-        INSERT INTO t1 VALUES(4, randomblob(15000));
-        INSERT INTO t1 VALUES(5, randomblob(15000));
-      }
-      db close
-      sqlite3_multiplex_initialize "" 1
-      sqlite3 db test.db
-      multiplex_set db main 4096 16
-    } {SQLITE_OK}
-    do_test multiplex-5.6.3.$jmode {
-      catchsql {
-        INSERT INTO t1 VALUES(6, randomblob(15000));
-      }
-    } {1 {disk I/O error}}
-    do_test multiplex-5.6.4.$jmode {
-      db close
-    } {}
-  }
-}
-
 #-------------------------------------------------------------------------
 # Test that you can vacuum a multiplex'ed DB.  
 
@@ -575,8 +531,9 @@ ifcapable vacuum {
 sqlite3_multiplex_shutdown
 do_test multiplex-6.0.0 {
   multiplex_delete test.db
+  multiplex_delete test.x
   sqlite3_multiplex_initialize "" 1
-  sqlite3 db test.db
+  sqlite3 db test.x
   multiplex_set db main 4096 16
 } {SQLITE_OK}
 
@@ -592,8 +549,8 @@ do_test multiplex-6.1.0 {
     INSERT INTO t1 VALUES(2, randomblob($g_chunk_size));
   }
 } {}
-do_test multiplex-6.2.1 { file size [multiplex_name test.db 0] } [list $g_chunk_size]
-do_test multiplex-6.2.2 { file size [multiplex_name test.db 1] } [list $g_chunk_size]
+do_test multiplex-6.2.1 { file size [multiplex_name test.x 0] } [list $g_chunk_size]
+do_test multiplex-6.2.2 { file size [multiplex_name test.x 1] } [list $g_chunk_size]
 
 do_test multiplex-6.3.0 {
   execsql { VACUUM }
@@ -601,7 +558,7 @@ do_test multiplex-6.3.0 {
 
 do_test multiplex-6.99 {
   db close
-  multiplex_delete test.db
+  multiplex_delete test.x
   sqlite3_multiplex_shutdown
 } {SQLITE_OK}
 
diff --git a/test/nan.test b/test/nan.test
index 3257a439..df3f65b8 100644
--- a/test/nan.test
+++ b/test/nan.test
@@ -320,6 +320,52 @@ do_realnum_test nan-4.20 {
   db eval {SELECT x, typeof(x) FROM t1}
 } {inf real}
 
+do_realnum_test nan-4.30 {
+  db eval {
+    DELETE FROM t1;
+    INSERT INTO t1 VALUES('2.5e+9999');
+    SELECT x, typeof(x) FROM t1;
+  }
+} {inf real}
+do_realnum_test nan-4.31 {
+  db eval {
+    DELETE FROM t1;
+    INSERT INTO t1 VALUES('2.5e+10000');
+    SELECT x, typeof(x) FROM t1;
+  }
+} {inf real}
+
+do_realnum_test nan-4.32 {
+  db eval {
+    DELETE FROM t1;
+    INSERT INTO t1 VALUES('2.5e-9999');
+    SELECT x, typeof(x) FROM t1;
+  }
+} {0.0 real}
+do_realnum_test nan-4.33 {
+  db eval {
+    DELETE FROM t1;
+    INSERT INTO t1 VALUES('2.5e-10000');
+    SELECT x, typeof(x) FROM t1;
+  }
+} {0.0 real}
+do_realnum_test nan-4.34 {
+  db eval {
+    DELETE FROM t1;
+    INSERT INTO t1 VALUES('2.5e2147483650');
+    SELECT x, typeof(x) FROM t1;
+  }
+} {inf real}
+do_realnum_test nan-4.35 {
+  db eval {
+    DELETE FROM t1;
+    INSERT INTO t1 VALUES('2.5e-2147483650');
+    SELECT x, typeof(x) FROM t1;
+  }
+} {0.0 real}
+
+  
+
 
 
 finish_test
diff --git a/test/notify1.test b/test/notify1.test
index 1cfb36fe..be6a1225 100644
--- a/test/notify1.test
+++ b/test/notify1.test
@@ -140,7 +140,7 @@ do_test notify1-2.2.5 {
 do_test notify1-2.3.1 {
   db close
   db2 close
-  file delete -force test.db test2.db test3.db
+  forcedelete test.db test2.db test3.db
   foreach con {db db2 db3} {
     sqlite3 $con test.db
     $con eval { ATTACH 'test2.db' AS aux2 }
@@ -294,7 +294,7 @@ do_malloc_test notify1-5 -tclprep {
 #
 db close
 do_test notify1-6.1.1 {
-  file delete -force test.db test2.db
+  forcedelete test.db test2.db
   foreach conn {db db2 db3} {
     sqlite3 $conn test.db
     execsql { ATTACH 'test2.db' AS two } $conn
diff --git a/test/notify2.test b/test/notify2.test
index bfb9af81..4016b6db 100644
--- a/test/notify2.test
+++ b/test/notify2.test
@@ -167,7 +167,7 @@ foreach {iTest xStep xPrepare} {
   1 sqlite3_blocking_step sqlite3_blocking_prepare_v2
   2 sqlite3_step          sqlite3_nonblocking_prepare_v2
 } {
-  file delete -force test.db test2.db test3.db
+  forcedelete test.db test2.db test3.db
 
   set ThreadSetup "set xStep $xStep;set xPrepare $xPrepare;set nSecond $nSecond"
 
diff --git a/test/notify3.test b/test/notify3.test
index 0d06ce19..446f0107 100644
--- a/test/notify3.test
+++ b/test/notify3.test
@@ -25,7 +25,7 @@ ifcapable !unlock_notify||!shared_cache {
 set esc [sqlite3_enable_shared_cache 1]
 
 sqlite3 db  test.db
-file delete -force test.db2 test.db2-journal test.db2-wal
+forcedelete test.db2 test.db2-journal test.db2-wal
 sqlite3 db2 test.db2
 
 do_test notify3-1.1 {
diff --git a/test/openv2.test b/test/openv2.test
index 843f8919..2a9e22d6 100644
--- a/test/openv2.test
+++ b/test/openv2.test
@@ -17,7 +17,7 @@ set testdir [file dirname $argv0]
 source $testdir/tester.tcl
 
 db close
-file delete -force test.db test.db-journal
+forcedelete test.db test.db-journal
 do_test openv2-1.1 {
   set rc [catch {sqlite3 db test.db -create 0} msg]
   lappend rc $msg
diff --git a/test/oserror.test b/test/oserror.test
index bdeb8684..40d2966b 100644
--- a/test/oserror.test
+++ b/test/oserror.test
@@ -97,23 +97,25 @@ do_re_test 1.4.2 { lindex $::log 0 } {^os_unix.c:\d*: \(\d+\) open\(.*test.db\)
 #--------------------------------------------------------------------------
 # Tests oserror-1.* test failures in the unlink() system call.
 #
-do_test 2.1.1 {
-  set ::log [list]
-  file mkdir test.db-wal
-  forcedelete test.db
-  list [catch {
-    sqlite3 dbh test.db
-    execsql { SELECT * FROM sqlite_master } dbh
-  } msg] $msg
-} {1 {disk I/O error}}
-
-do_re_test 2.1.2 { 
-  lindex $::log 0 
-} {^os_unix.c:\d+: \(\d+\) unlink\(.*test.db-wal\) - }
-do_test 2.1.3 { 
-  catch { dbh close }
-  forcedelete test.db-wal
-} {}
+ifcapable wal {
+  do_test 2.1.1 {
+    set ::log [list]
+    file mkdir test.db-wal
+    forcedelete test.db
+    list [catch {
+      sqlite3 dbh test.db
+      execsql { SELECT * FROM sqlite_master } dbh
+    } msg] $msg
+  } {1 {disk I/O error}}
+  
+  do_re_test 2.1.2 { 
+    lindex $::log 0 
+  } {^os_unix.c:\d+: \(\d+\) unlink\(.*test.db-wal\) - }
+  do_test 2.1.3 { 
+    catch { dbh close }
+    forcedelete test.db-wal
+  } {}
+}
   
 
 test_syscall reset
diff --git a/test/pager1.test b/test/pager1.test
index 136ca05f..0226fe49 100644
--- a/test/pager1.test
+++ b/test/pager1.test
@@ -452,7 +452,7 @@ do_test pager1.4.2.2 {
 } {4 ok}
 do_test pager1.4.2.3 {
   faultsim_restore_and_reopen
-  foreach f [glob test.db-mj*] { file delete -force $f }
+  foreach f [glob test.db-mj*] { forcedelete $f }
   execsql {
     SELECT count(*) FROM t1;
     PRAGMA integrity_check;
@@ -469,7 +469,7 @@ do_test pager1.4.2.4 {
 do_test pager1.4.2.5 {
   faultsim_restore_and_reopen
   hexio_write test.db-journal [expr [file size test.db-journal]-20] 123456
-  foreach f [glob test.db-mj*] { file delete -force $f }
+  foreach f [glob test.db-mj*] { forcedelete $f }
   execsql {
     SELECT count(*) FROM t1;
     PRAGMA integrity_check;
@@ -649,7 +649,7 @@ foreach {tn1 tcl} {
     #
     do_test pager1-4.4.$tn.7 {
       faultsim_restore_and_reopen $prefix
-      foreach f [glob ${prefix}-mj*] { file delete -force $f }
+      foreach f [glob ${prefix}-mj*] { forcedelete $f }
       execsql "ATTACH '${prefix}2' AS aux"
     } {}
     do_execsql_test pager1-4.4.$tn.8 {
@@ -664,7 +664,7 @@ foreach {tn1 tcl} {
 }
 db close
 tv delete
-file delete -force $dirname
+forcedelete $dirname
 
 
 # Set up a VFS to make a copy of the file-system just before deleting a
@@ -882,7 +882,7 @@ do_test pager1.4.7.3 {
   db close
   catch {file attributes test.db-journal -permissions rw-rw-rw-}
   catch {file attributes test.db-journal -readonly 0}
-  file delete test.db-journal
+  delete_file test.db-journal
   file exists test.db-journal
 } {0}
 
@@ -1766,6 +1766,10 @@ do_multiclient_test tn {
 #   + Page 0,
 #   + A page with a page number greater than (2^31-1).
 #
+# These tests will not work if SQLITE_DIRECT_OVERFLOW_READ is defined. In
+# that case IO errors are sometimes reported instead of SQLITE_CORRUPT.
+#
+ifcapable !direct_read {
 do_test pager1-18.1 {
   faultsim_delete_and_reopen
   db func a_string a_string
@@ -1841,6 +1845,7 @@ do_test pager1-18.6 {
   sqlite3 db test.db
   catchsql { SELECT length(x) FROM t1 }
 } {1 {database disk image is malformed}}
+}
 
 do_test pager1-19.1 {
   sqlite3 db ""
@@ -1992,31 +1997,33 @@ ifcapable wal {
 #   pager1-22.1.*: is a no-op on a non-WAL db, and
 #   pager1-22.2.*: does not cause xSync calls with a synchronous=off db.
 #
-do_test pager1-22.1.1 {
-  faultsim_delete_and_reopen
-  execsql {
-    CREATE TABLE ko(c DEFAULT 'abc', b DEFAULT 'def');
-    INSERT INTO ko DEFAULT VALUES;
-  }
-  execsql { PRAGMA wal_checkpoint }
-} {0 -1 -1}
-do_test pager1-22.2.1 {
-  testvfs tv -default 1
-  tv filter xSync
-  tv script xSyncCb
-  proc xSyncCb {args} {incr ::synccount}
-  set ::synccount 0
-  sqlite3 db test.db
-  execsql {
-    PRAGMA synchronous = off;
-    PRAGMA journal_mode = WAL;
-    INSERT INTO ko DEFAULT VALUES;
-  }
-  execsql { PRAGMA wal_checkpoint }
-  set synccount
-} {0}
-db close
-tv delete
+ifcapable wal {
+  do_test pager1-22.1.1 {
+    faultsim_delete_and_reopen
+    execsql {
+      CREATE TABLE ko(c DEFAULT 'abc', b DEFAULT 'def');
+      INSERT INTO ko DEFAULT VALUES;
+    }
+    execsql { PRAGMA wal_checkpoint }
+  } {0 -1 -1}
+  do_test pager1-22.2.1 {
+    testvfs tv -default 1
+    tv filter xSync
+    tv script xSyncCb
+    proc xSyncCb {args} {incr ::synccount}
+    set ::synccount 0
+    sqlite3 db test.db
+    execsql {
+      PRAGMA synchronous = off;
+      PRAGMA journal_mode = WAL;
+      INSERT INTO ko DEFAULT VALUES;
+    }
+    execsql { PRAGMA wal_checkpoint }
+    set synccount
+  } {0}
+  db close
+  tv delete
+}
 
 #-------------------------------------------------------------------------
 # Tests for changing journal mode.
@@ -2368,8 +2375,8 @@ do_test pager1-29.2 {
 #
 do_test pager1-30.1 {
   db close
-  file delete test.db
-  file delete test.db-journal
+  delete_file test.db
+  delete_file test.db-journal
   set fd [open test.db-journal w]
   seek $fd [expr 512+1032*2]
   puts -nonewline $fd x
@@ -2409,8 +2416,8 @@ do_test pager1-31.1 {
     BEGIN;
       UPDATE t1 SET y = randomblob(1499);
   }
-  file copy test.db test.db2
-  file copy test.db-journal test.db2-journal
+  copy_file test.db test.db2
+  copy_file test.db-journal test.db2-journal
   
   hexio_write test.db2-journal 24 00000000
   sqlite3 db2 test.db2
@@ -2418,5 +2425,43 @@ do_test pager1-31.1 {
 } {ok}
 }
 
+#-------------------------------------------------------------------------
+# Test that a database file can be "pre-hinted" to a certain size and that
+# subsequent spilling of the pager cache does not result in the database
+# file being shrunk.
+#
+catch {db close}
+forcedelete test.db
+
+do_test pager1-32.1 {
+  sqlite3 db test.db
+  execsql {
+    CREATE TABLE t1(x, y);
+  }
+  db close
+  sqlite3 db test.db
+  execsql {
+    BEGIN;
+    INSERT INTO t1 VALUES(1, randomblob(10000));
+  }
+  file_control_chunksize_test db main 1024
+  file_control_sizehint_test db main 20971520; # 20MB
+  execsql {
+    PRAGMA cache_size = 10;
+    INSERT INTO t1 VALUES(1, randomblob(10000));
+    INSERT INTO t1 VALUES(2, randomblob(10000));
+    INSERT INTO t1 SELECT x+2, randomblob(10000) from t1;
+    INSERT INTO t1 SELECT x+4, randomblob(10000) from t1;
+    INSERT INTO t1 SELECT x+8, randomblob(10000) from t1;
+    INSERT INTO t1 SELECT x+16, randomblob(10000) from t1;
+    SELECT count(*) FROM t1;
+    COMMIT;
+  }
+  db close
+  file size test.db
+} {20971520}
+
+# Cleanup 20MB file left by the previous test.
+forcedelete test.db
 
 finish_test
diff --git a/test/pagerfault.test b/test/pagerfault.test
index ced6da3b..e04e97e4 100644
--- a/test/pagerfault.test
+++ b/test/pagerfault.test
@@ -233,7 +233,7 @@ do_faultsim_test pagerfault-5.2 -prep {
 do_faultsim_test pagerfault-5.3 -faults oom-transient -prep {
   faultsim_restore_and_reopen
   db func a_string a_string
-  file delete -force test2.db test2.db-journal test2.db-wal
+  forcedelete test2.db test2.db-journal test2.db-wal
   execsql { 
     PRAGMA journal_mode = PERSIST;
     ATTACH 'test2.db' AS aux;
@@ -641,7 +641,7 @@ do_test pagerfault-13-pre1 {
     COMMIT;
   }
   db close
-  file delete -force test.db
+  forcedelete test.db
   faultsim_save
 } {}
 do_faultsim_test pagerfault-13 -prep {
@@ -1106,7 +1106,7 @@ do_faultsim_test pagerfault-22 -prep {
 #
 do_faultsim_test pagerfault-23 -prep {
   sqlite3 db :memory:
-  foreach f [glob -nocomplain test.db*] { file delete -force $f }
+  foreach f [glob -nocomplain test.db*] { forcedelete $f }
   db eval { 
     ATTACH 'test.db2' AS aux;
     CREATE TABLE t1(a, b);
diff --git a/test/pageropt.test b/test/pageropt.test
index 1c634f64..82311965 100644
--- a/test/pageropt.test
+++ b/test/pageropt.test
@@ -17,7 +17,7 @@
 set testdir [file dirname $argv0]
 source $testdir/tester.tcl
 
-ifcapable {!pager_pragmas||secure_delete} {
+ifcapable {!pager_pragmas||secure_delete||direct_read} {
   finish_test
   return
 }
diff --git a/test/pagesize.test b/test/pagesize.test
index af2c017b..0eebbbb7 100644
--- a/test/pagesize.test
+++ b/test/pagesize.test
@@ -42,7 +42,7 @@ do_test pagesize-1.3 {
 
 do_test pagesize-1.4 {
   db close
-  file delete -force test.db
+  forcedelete test.db
   sqlite3 db test.db
   execsql {
     PRAGMA page_size=511;
@@ -99,7 +99,7 @@ foreach PGSZ {512 2048 4096 8192} {
   }
   do_test pagesize-2.$PGSZ.1 {
     db close
-    file delete -force test.db
+    forcedelete test.db
     sqlite3 db test.db
     execsql "PRAGMA page_size=$PGSZ"
     execsql {
@@ -190,7 +190,7 @@ foreach PGSZ {512 2048 4096 8192} {
   integrity_check pagesize-2.$PGSZ.17
 
   db close
-  file delete -force test.db
+  forcedelete test.db
   sqlite3 db test.db
   do_test pagesize-2.$PGSZ.30 {
     execsql "
@@ -203,7 +203,7 @@ foreach PGSZ {512 2048 4096 8192} {
   } [list 1024 $PGSZ]
 
   db close
-  file delete -force test.db
+  forcedelete test.db
   sqlite3 db test.db
   do_test pagesize-2.$PGSZ.40 {
     execsql "
diff --git a/test/pcache2.test b/test/pcache2.test
index 14df52eb..77e7a261 100644
--- a/test/pcache2.test
+++ b/test/pcache2.test
@@ -16,7 +16,6 @@
 set testdir [file dirname $argv0]
 source $testdir/tester.tcl
 
-
 # Set up a pcache memory pool so that we can easily track how many
 # pages are being used for cache.
 #
@@ -34,13 +33,13 @@ do_test pcache2-1.1 {
 # Open up two database connections to separate files.
 #
 do_test pcache2-1.2 {
-  file delete -force test.db test.db-journal
+  forcedelete test.db test.db-journal
   sqlite3 db test.db
   db eval {PRAGMA cache_size=10}
   lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_USED 0] 1
 } {2}
 do_test pcache2-1.3 {
-  file delete -force test2.db test2.db-journal
+  forcedelete test2.db test2.db-journal
   sqlite3 db2 test2.db
   db2 eval {PRAGMA cache_size=50}
   lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_USED 0] 1
diff --git a/test/permutations.test b/test/permutations.test
index 22e2189d..7c3b026c 100644
--- a/test/permutations.test
+++ b/test/permutations.test
@@ -111,7 +111,7 @@ set allquicktests [test_set $alltests -exclude {
   thread003.test thread004.test thread005.test trans2.test vacuum3.test 
   incrvacuum_ioerr.test autovacuum_crash.test btree8.test shared_err.test
   vtab_err.test walslow.test walcrash.test 
-  walthread.test rtree3.test
+  walthread.test rtree3.test indexfault.test
 }]
 if {[info exists ::env(QUICKTEST_INCLUDE)]} {
   set allquicktests [concat $allquicktests $::env(QUICKTEST_INCLUDE)]
@@ -180,10 +180,12 @@ test_suite "fts3" -prefix "" -description {
   fts3defer.test fts3defer2.test fts3e.test fts3expr.test fts3expr2.test 
   fts3near.test fts3query.test fts3shared.test fts3snippet.test 
   fts3sort.test
-
   fts3fault.test fts3malloc.test fts3matchinfo.test
-
   fts3aux1.test fts3comp1.test fts3auto.test
+  fts4aa.test fts4content.test
+  fts3conf.test fts3prefix.test fts3fault2.test fts3corrupt.test
+  fts3corrupt2.test
+  fts3first.test
 }
 
 
@@ -520,7 +522,7 @@ test_suite "inmemory_journal" -description {
   # the number of fsync() calls.
   pager.test exclusive.test jrnlmode.test sync.test misc1.test 
   journal1.test conflict.test crash8.test tkt3457.test io.test
-  journal3.test
+  journal3.test 8_3_names.test
 
   pager1.test async4.test corrupt.test filefmt.test pager2.test
   corrupt5.test corruptA.test pageropt.test
@@ -529,7 +531,7 @@ test_suite "inmemory_journal" -description {
   stmt.test
 
   # WAL mode is different.
-  wal* tkt-2d1a5c67d.test
+  wal* tkt-2d1a5c67d.test backcompat.test
 }]
 
 ifcapable mem3 {
@@ -726,7 +728,7 @@ test_suite "journaltest" -description {
   unregister_jt_vfs
 } -files [test_set $::allquicktests -exclude {
   wal* incrvacuum.test ioerr.test corrupt4.test io.test crash8.test 
-  async4.test bigfile.test
+  async4.test bigfile.test backcompat.test
 }]
 
 if {[info commands register_demovfs] != ""} {
@@ -776,6 +778,15 @@ test_suite "no_optimization" -description {
   optimization_control $::dbhandle all 0
 }
 
+test_suite "prepare" -description {
+  Run tests with the db connection using sqlite3_prepare() instead of _v2().
+} -dbconfig {
+  db_use_legacy_prepare $::dbhandle 1
+  #$::dbhandle cache size 0
+} -files [
+  test_set $allquicktests -exclude *malloc* *ioerr* *fault*
+]
+
 # End of tests
 #############################################################################
 
@@ -856,4 +867,3 @@ if {[info script] == $argv0} {
   main $argv
   finish_test
 }
-
diff --git a/test/pragma.test b/test/pragma.test
index 4b441829..0cad25a3 100644
--- a/test/pragma.test
+++ b/test/pragma.test
@@ -51,8 +51,8 @@ ifcapable !pragma {
 # that the "all.test" script does.
 #
 db close
-file delete test.db test.db-journal
-file delete test3.db test3.db-journal
+delete_file test.db test.db-journal
+delete_file test3.db test3.db-journal
 sqlite3 db test.db; set DB [sqlite3_connection_pointer db]
 
 
@@ -221,8 +221,8 @@ do_test pragma-1.18 {
 # Test modifying the safety_level of an attached database.
 ifcapable pager_pragmas&&attach {
   do_test pragma-2.1 {
-    file delete -force test2.db
-    file delete -force test2.db-journal
+    forcedelete test2.db
+    forcedelete test2.db-journal
     execsql {
       ATTACH 'test2.db' AS aux;
     } 
@@ -255,7 +255,7 @@ ifcapable pager_pragmas&&attach {
 #
 do_test pragma-3.1 {
   db close
-  file delete -force test.db test.db-journal
+  forcedelete test.db test.db-journal
   sqlite3 db test.db
   execsql {
     PRAGMA auto_vacuum=OFF;
@@ -312,7 +312,7 @@ ifcapable attach {
     #
     do_test pragma-3.8 {
       execsql {DETACH t2}
-      file delete -force testerr.db testerr.db-journal
+      forcedelete testerr.db testerr.db-journal
       set out [open testerr.db w]
       fconfigure $out -translation binary
       set in [open test.db r]
@@ -329,6 +329,9 @@ ifcapable attach {
     do_test pragma-3.8.1 {
       execsql {PRAGMA quick_check}
     } {ok}
+    do_test pragma-3.8.2 {
+      execsql {PRAGMA QUICK_CHECK}
+    } {ok}
     do_test pragma-3.9 {
       execsql {
         ATTACH 'testerr.db' AS t2;
@@ -419,7 +422,7 @@ Page 6 is never used} {rowid 1 missing from index i2}}
   }
   do_test pragma-3.19 {
     catch {db close}
-    file delete -force test.db test.db-journal
+    forcedelete test.db test.db-journal
     sqlite3 db test.db
     db eval {PRAGMA integrity_check}
   } {ok}
@@ -741,8 +744,8 @@ do_test pragma-8.1.10 {
 } SQLITE_SCHEMA
 
 # Make sure the schema-version can be manipulated in an attached database.
-file delete -force test2.db
-file delete -force test2.db-journal
+forcedelete test2.db
+forcedelete test2.db-journal
 ifcapable attach {
   do_test pragma-8.1.11 {
     execsql {
@@ -1205,7 +1208,7 @@ do_test pragma-13.1 {
 
 ifcapable pager_pragmas {
   db close
-  file delete -force test.db
+  forcedelete test.db
   sqlite3 db test.db
 
   do_test pragma-14.1 {
@@ -1219,6 +1222,9 @@ ifcapable pager_pragmas {
       PRAGMA page_count;
     }
   } {2}
+  do_test pragma-14.2uc {
+    execsql {pragma PAGE_COUNT}
+  } {2}
 
   do_test pragma-14.3 {
     execsql { 
@@ -1227,6 +1233,9 @@ ifcapable pager_pragmas {
       PRAGMA page_count;
     }
   } {3}
+  do_test pragma-14.3uc {
+    execsql {pragma PAGE_COUNT}
+  } {3}
 
   do_test pragma-14.4 {
     set page_size [db one {pragma page_size}]
@@ -1241,7 +1250,7 @@ ifcapable pager_pragmas {
   } {2}
 
   do_test pragma-14.6 {
-    file delete -force test2.db
+    forcedelete test2.db
     sqlite3 db2 test2.db
     execsql {
       PRAGMA auto_vacuum = 0;
@@ -1256,6 +1265,9 @@ ifcapable pager_pragmas {
       PRAGMA aux.page_count;
     } 
   } {5}
+  do_test pragma-14.6uc {
+    execsql {pragma AUX.PAGE_COUNT}
+  } {5}
 }
 
 # Test that the value set using the cache_size pragma is not reset when the
diff --git a/test/pragma2.test b/test/pragma2.test
index 87c3c5d0..1111a984 100644
--- a/test/pragma2.test
+++ b/test/pragma2.test
@@ -33,8 +33,8 @@ ifcapable !pragma||!schema_pragmas {
 # that the "all.test" script does.
 #
 db close
-file delete test.db test.db-journal
-file delete test3.db test3.db-journal
+delete_file test.db test.db-journal
+delete_file test3.db test3.db-journal
 sqlite3 db test.db; set DB [sqlite3_connection_pointer db]
 db eval {PRAGMA auto_vacuum=0}
 
@@ -61,8 +61,8 @@ do_test pragma2-1.4 {
   }
 } {1}
 
-file delete -force test2.db
-file delete -force test2.db-journal
+forcedelete test2.db
+forcedelete test2.db-journal
 
 ifcapable attach {
   do_test pragma2-2.1 {
diff --git a/test/printf.test b/test/printf.test
index 100ce96b..73222720 100644
--- a/test/printf.test
+++ b/test/printf.test
@@ -3547,7 +3547,7 @@ do_test printf-4.16 {
 do_test printf-5.1 {
   set x [sqlite3_mprintf_str {%d %d %100000s} 0 0 {Hello}]
   string length $x
-} {344}
+} {100004}
 do_test printf-5.2 {
   sqlite3_mprintf_str {%d %d (%-10.10s) %} -9 -10 {HelloHelloHello}
 } {-9 -10 (HelloHello) %}
diff --git a/test/quota.test b/test/quota.test
index d7601e0e..49b403f1 100644
--- a/test/quota.test
+++ b/test/quota.test
@@ -123,7 +123,7 @@ proc quota_check {filename limitvar size} {
 }
 
 do_test quota-3.1.1 {
-  file delete -force test.db
+  forcedelete test.db
   sqlite3_quota_initialize "" 1
   sqlite3_quota_set *test.db 4096 quota_check
 } {SQLITE_OK}
@@ -158,7 +158,7 @@ do_test quota-3.1.6 {
 } {SQLITE_OK}
 
 do_test quota-3.2.1 {
-  file delete force test.db test2.db 
+  delete_file force test.db test2.db 
 
   sqlite3_quota_set * 4096 {}
   sqlite3 db1a test.db
@@ -223,7 +223,7 @@ do_test quota-3.2.X {
 } {SQLITE_OK}
 
 #-------------------------------------------------------------------------
-# Quotas are deleted when unused and when there limit is set to zero
+# Quotas are deleted when unused and when their limit is set to zero
 #
 
 # Return a list of all currently defined quotas.  Each quota is identified
@@ -235,6 +235,13 @@ proc quota_list {} {
   }
   return [lsort $allq]
 }
+proc quota_size {name} {
+  set allq {}
+  foreach q [sqlite3_quota_dump] {
+    if {[lindex $q 0]==$name} {return [lindex $q 2]}
+  }
+  return 0
+}
 
 do_test quota-4.1.1 {
   sqlite3_quota_set *test.db 0 {}
@@ -257,7 +264,7 @@ do_test quota-4.1.5 {
   quota_list
 } {*test2.db}
 do_test quota-4.1.6 {
-  file delete -force test2.db test2.db-journal test2.db-wal
+  forcedelete test2.db test2.db-journal test2.db-wal
   sqlite3 db test2.db
   db eval {CREATE TABLE t2(x); INSERT INTO t2 VALUES('tab-t2');}
   quota_list
@@ -329,11 +336,121 @@ do_test quota-4.3.1 {
   quota_list
 } {}
 
+unset -nocomplain quotagroup
+if {$tcl_platform(platform)=="windows"} {
+  set quotagroup *\\quota-test-A?.db
+} else {
+  set quotagroup */quota-test-A?.db
+} 
+foreach file [glob -nocomplain quota-test-A*] {
+  forcedelete $file
+}
 do_test quota-4.4.1 {
+  set ::quota {}
+  sqlite3_quota_set $::quotagroup 10000 quota_callback
+  file delete -force ./quota-test-A1.db ./quota-test-A2.db
+  sqlite3 db ./quota-test-A1.db
+  db eval {
+     CREATE TABLE t1(x);
+     INSERT INTO t1 VALUES(randomblob(5000));
+  }
+  quota_list
+} [list $quotagroup]
+do_test quota-4.4.2 {
+  expr {$::quota==""}
+} {1}
+do_test quota-4.4.3 {
+  db close
+  sqlite3 db ./quota-test-A2.db
+  db eval {
+     CREATE TABLE t1(x);
+     INSERT INTO t1 VALUES(randomblob(5000));
+  }
+  quota_list
+} [list $quotagroup]
+do_test quota-4.4.4 {
+  expr {$::quota!=""}
+} {1}
+do_test quota-4.4.5 {
+  db close
+  sqlite3_quota_set $::quotagroup 0 {}
+  sqlite3_quota_dump
+} {}
+do_test quota-4.4.6 {
+  sqlite3_quota_set $quotagroup 10000 quota_callback
+  sqlite3 db quota-test-A1.db
+  db eval {SELECT count(*) FROM sqlite_master}
+  quota_size $quotagroup
+} [file size quota-test-A1.db]
+do_test quota-4.4.7 {
+  sqlite3_quota_file quota-test-A2.db
+  quota_size $::quotagroup
+} [expr {[file size quota-test-A1.db]+[file size quota-test-A2.db]}]
+
+unset -nocomplain quotagroup
+if {$tcl_platform(platform)=="windows"} {
+  set quotagroup *\\quota-test-B*
+} else {
+  set quotagroup */quota-test-B*
+} 
+foreach file [glob -nocomplain quota-test-B*] {
+  forcedelete $file
+}
+do_test quota-4.5.1 {
+  sqlite3_quota_set $::quotagroup 100000 quota_callback
+  quota_size $::quotagroup
+} {0}
+do_test quota-4.5.2 {
+  sqlite3_quota_file quota-test-B1.txt
+  quota_size $::quotagroup
+} {0}
+proc add_to_file {name n} {
+  set out [open $name a]
+  fconfigure $out -translation binary
+  puts -nonewline $out [string repeat x $n]
+  close $out
+}
+do_test quota-4.5.3 {
+  add_to_file quota-test-B1.txt 123
+  sqlite3_quota_file quota-test-B1.txt
+  quota_size $::quotagroup
+} {123}
+do_test quota-4.5.4 {
+  add_to_file quota-test-B2.txt 234
+  sqlite3_quota_file quota-test-B2.txt
+  quota_size $::quotagroup
+} {357}
+do_test quota-4.5.5 {
+  add_to_file quota-test-B1.txt 2000
+  sqlite3_quota_file quota-test-B1.txt
+  quota_size $::quotagroup
+} {2357}
+do_test quota-4.5.6 {
+  forcedelete quota-test-B1.txt
+  sqlite3_quota_file quota-test-B1.txt
+  quota_size $::quotagroup
+} {234}
+do_test quota-4.5.7 {
+  forcedelete quota-test-B2.txt
+  sqlite3_quota_file quota-test-B2.txt
+  quota_size $::quotagroup
+} {0}
+do_test quota-4.5.8 {
+  add_to_file quota-test-B3.txt 1234
+  sqlite3_quota_file quota-test-B3.txt
+  quota_size $::quotagroup
+} {1234}
+do_test quota-4.5.9 {
+  sqlite3_quota_set $quotagroup 0 {}
+  quota_size $::quotagroup
+} {0}
+
+do_test quota-4.9.1 {
+  db close
   sqlite3_quota_set A 1000 quota_callback
   sqlite3_quota_shutdown
 } {SQLITE_OK}
-do_test quota-4.4.2 {
+do_test quota-4.9.2 {
   quota_list
 } {}
 
@@ -357,7 +474,7 @@ do_faultsim_test quota-5.2 -prep {
 }
 
 catch { db close }
-file delete -force test.db
+forcedelete test.db
 
 do_test quota-5.3.prep {
   sqlite3 db test.db
@@ -377,7 +494,7 @@ do_faultsim_test quota-5.3 -prep {
 
 do_test quota-5.4.1 {
   catch { db close }
-  file delete -force test.db
+  forcedelete test.db
   file mkdir test.db
   list [catch { sqlite3 db test.db } msg] $msg
 } {1 {unable to open database file}}
diff --git a/test/releasetest.tcl b/test/releasetest.tcl
index 84542bb8..77256301 100644
--- a/test/releasetest.tcl
+++ b/test/releasetest.tcl
@@ -155,10 +155,10 @@ array set ::Configs {
 
 array set ::Platforms {
   Linux-x86_64 {
+    "Debug-One"               "checksymbols test"
     "Secure-Delete"           test
     "Unlock-Notify"           "QUICKTEST_INCLUDE=notify2.test test"
     "Update-Delete-Limit"     test
-    "Debug-One"               test
     "Extra-Robustness"        test
     "Device-Two"              test
     "Ftrapv"                  test
@@ -177,6 +177,7 @@ array set ::Platforms {
   }
 }
 
+
 # End of configuration section.
 #########################################################################
 #########################################################################
diff --git a/test/rollback.test b/test/rollback.test
index d462fc48..fc123ab9 100644
--- a/test/rollback.test
+++ b/test/rollback.test
@@ -88,8 +88,8 @@ if {$tcl_platform(platform) == "unix"
       BEGIN;
       INSERT INTO t3 VALUES('hello world');
     }
-    file copy -force test.db testA.db
-    file copy -force test.db-journal testA.db-journal
+    forcecopy test.db testA.db
+    forcecopy test.db-journal testA.db-journal
     execsql {
       COMMIT;
     }
diff --git a/test/savepoint.test b/test/savepoint.test
index 042c5558..3bbbaaae 100644
--- a/test/savepoint.test
+++ b/test/savepoint.test
@@ -371,7 +371,7 @@ wal_check_journal_mode savepoint-5.5
 #
 ifcapable {autovacuum && pragma} {
   db close
-  file delete -force test.db
+  forcedelete test.db
   sqlite3 db test.db
 
   do_test savepoint-6.1 {
@@ -419,7 +419,7 @@ ifcapable {autovacuum && pragma} {
 # surrounding savepoints by growing and shrinking the database file.
 #
 db close
-file delete -force test.db
+forcedelete test.db
 sqlite3 db test.db
 
 do_test savepoint-7.1 {
@@ -490,7 +490,7 @@ wal_check_journal_mode savepoint-7.3.3
 
 do_test savepoint-7.4.1 {
   db close
-  file delete -force test.db
+  forcedelete test.db
   sqlite3 db test.db
   execsql { PRAGMA auto_vacuum = incremental }
   wal_set_journal_mode
@@ -640,8 +640,8 @@ set templockstate [lindex [db eval {PRAGMA lock_status}] 3]
 
 if {[wal_is_wal_mode]==0} {
   do_test savepoint-10.2.1 {
-    file delete -force test3.db
-    file delete -force test2.db
+    forcedelete test3.db
+    forcedelete test2.db
     execsql {
       ATTACH 'test2.db' AS aux1;
       ATTACH 'test3.db' AS aux2;
@@ -762,7 +762,7 @@ if {[wal_is_wal_mode]==0} {
 # 
 do_test savepoint-11.1 {
   db close
-  file delete -force test.db
+  forcedelete test.db
   sqlite3 db test.db
   execsql { PRAGMA auto_vacuum = full; }
   wal_set_journal_mode
@@ -868,7 +868,7 @@ wal_check_journal_mode savepoint-12.5
 if {[wal_is_wal_mode]==0} {
   do_test savepoint-13.1 {
     db close
-    catch {file delete -force test.db}
+    catch {forcedelete test.db}
     sqlite3 db test.db
     execsql {
       BEGIN;
@@ -909,7 +909,7 @@ if {[wal_is_wal_mode]==0} {
 }
 
 db close
-file delete test.db
+delete_file test.db
 do_multiclient_test tn {
   do_test savepoint-14.$tn.1 {
     sql1 {
diff --git a/test/savepoint6.test b/test/savepoint6.test
index 60fde4c2..b1d0d46f 100644
--- a/test/savepoint6.test
+++ b/test/savepoint6.test
@@ -246,7 +246,7 @@ foreach zSetup [list {
   unset -nocomplain ::aEntry
 
   catch { db close }
-  file delete -force test.db test.db-wal test.db-journal
+  forcedelete test.db test.db-wal test.db-journal
   eval $zSetup
   sql $DATABASE_SCHEMA
 
diff --git a/test/securedel.test b/test/securedel.test
index c965069e..7ff5a628 100644
--- a/test/securedel.test
+++ b/test/securedel.test
@@ -26,7 +26,7 @@ do_test securedel-1.0 {
   db eval {PRAGMA secure_delete;}
 } $DEFAULT_SECDEL
 
-file delete -force test2.db test2.db-journal
+forcedelete test2.db test2.db-journal
 do_test securedel-1.1 {
   db eval {
     ATTACH 'test2.db' AS db2;
diff --git a/test/selectB.test b/test/selectB.test
index 3fdf85c0..b9d979ac 100644
--- a/test/selectB.test
+++ b/test/selectB.test
@@ -355,7 +355,7 @@ for {set ii 3} {$ii <= 4} {incr ii} {
         SELECT DISTINCT (a/10) FROM t1 UNION ALL SELECT DISTINCT(d%2) FROM t2
       )
     }
-  } {0 1 0 1}
+  } {0 1 1 0}
 
   do_test selectB-$ii.20 {
     execsql {
diff --git a/test/server1.test b/test/server1.test
index 134a9f57..90673ef0 100644
--- a/test/server1.test
+++ b/test/server1.test
@@ -29,7 +29,7 @@ if {[llength [info command client_step]]==0 || [sqlite3 -has-codec]} {
 # The sample server implementation does not work right when memory
 # management is enabled.
 #
-ifcapable memorymanage {
+ifcapable (memorymanage||mutex_noop) {
   finish_test
   return
 }
diff --git a/test/shared.test b/test/shared.test
index 35ddf088..37564e69 100644
--- a/test/shared.test
+++ b/test/shared.test
@@ -27,7 +27,7 @@ set ::enable_shared_cache [sqlite3_enable_shared_cache 1]
 foreach av [list 0 1] {
 
 # Open the database connection and execute the auto-vacuum pragma
-file delete -force test.db
+forcedelete test.db
 sqlite3 db test.db
 
 ifcapable autovacuum {
@@ -293,9 +293,9 @@ catch {db3 close}
 #     db2.main  ->   ./test2.db
 #     db2.test  ->   ./test.db
 #
-file delete -force test.db
-file delete -force test2.db
-file delete -force test2.db-journal
+forcedelete test.db
+forcedelete test2.db
+forcedelete test2.db-journal
 sqlite3 db  test.db
 sqlite3 db2 test2.db
 do_test shared-$av.4.1.1 {
@@ -426,7 +426,7 @@ catch {db close}
 # Tests shared-5.* 
 #
 foreach db [list test.db test1.db test2.db test3.db] {
-  file delete -force $db ${db}-journal
+  forcedelete $db ${db}-journal
 }
 do_test shared-$av.5.1.1 {
   sqlite3 db1 test.db
@@ -557,7 +557,7 @@ do_test shared-$av.6.1.4 {
 catch {db1 close}
 catch {db2 close}
 foreach f [list test.db test2.db] {
-  file delete -force $f ${f}-journal
+  forcedelete $f ${f}-journal
 }
 
 #--------------------------------------------------------------------------
@@ -643,7 +643,7 @@ unset -nocomplain contents
 # The following tests try to trick the shared-cache code into assuming
 # the wrong encoding for a database.
 #
-file delete -force test.db test.db-journal
+forcedelete test.db test.db-journal
 ifcapable utf16 {
   do_test shared-$av.8.1.1 {
     sqlite3 db test.db
@@ -675,7 +675,7 @@ ifcapable utf16 {
     }
   } {UTF-8}
 
-  file delete -force test2.db test2.db-journal
+  forcedelete test2.db test2.db-journal
   do_test shared-$av.8.2.1 {
     execsql {
       ATTACH 'test2.db' AS aux;
@@ -693,7 +693,7 @@ ifcapable utf16 {
 
   catch {db close}
   catch {db2 close}
-  file delete -force test.db test2.db
+  forcedelete test.db test2.db
 
   do_test shared-$av.8.3.2 {
     sqlite3 db test.db
@@ -732,7 +732,7 @@ if 0 {
 
 catch {db close}
 catch {db2 close}
-file delete -force test.db test2.db
+forcedelete test.db test2.db
 
 #---------------------------------------------------------------------------
 # The following tests - shared-9.* - test interactions between TEMP triggers
@@ -772,7 +772,7 @@ do_test shared-$av.9.3 {
 #
 do_test shared-$av.10.1 {
   # Create a small sample database with two connections to it (db and db2).
-  file delete -force test.db
+  forcedelete test.db
   sqlite3 db  test.db
   sqlite3 db2 test.db
   execsql {
@@ -853,7 +853,7 @@ do_test shared-$av.10.11 {
 } {}
 
 do_test shared-$av.11.1 {
-  file delete -force test.db
+  forcedelete test.db
   sqlite3 db  test.db
   sqlite3 db2 test.db
   execsql {
@@ -916,7 +916,7 @@ do_test shared-$av.11.11 {
 
 # This tests that if it is impossible to free any pages, SQLite will
 # exceed the limit set by PRAGMA cache_size.
-file delete -force test.db test.db-journal
+forcedelete test.db test.db-journal
 sqlite3 db test.db 
 ifcapable pager_pragmas {
   do_test shared-$av.12.1 {
@@ -963,7 +963,7 @@ do_test shared-$av.12.X {
 # database handle. This covers an extra line or two.
 #
 do_test shared-$av.13.1 {
-  file delete -force test2.db test3.db test4.db test5.db
+  forcedelete test2.db test3.db test4.db test5.db
   sqlite3 db :memory:
   execsql {
     ATTACH 'test2.db' AS aux2;
@@ -1026,7 +1026,7 @@ do_test shared-$av.14.3 {
 # assert() statements in the C code.
 #
 do_test shared-$av-15.1 {
-  file delete -force test.db
+  forcedelete test.db
   sqlite3 db test.db -fullmutex 1
   sqlite3 db2 test.db -fullmutex 1
   execsql {
diff --git a/test/shared2.test b/test/shared2.test
index d2a0d1b0..d40c9a27 100644
--- a/test/shared2.test
+++ b/test/shared2.test
@@ -129,7 +129,7 @@ do_test shared2-3.2 {
   sqlite3_enable_shared_cache 1
 } {1}
 
-file delete -force test.db
+forcedelete test.db
 
 sqlite3 db test.db
 do_test shared2-4.1 {
diff --git a/test/shared3.test b/test/shared3.test
index 8f9eae9b..783ae6a8 100644
--- a/test/shared3.test
+++ b/test/shared3.test
@@ -24,7 +24,7 @@ set ::enable_shared_cache [sqlite3_enable_shared_cache 1]
 # Ticket #1824
 #
 do_test shared3-1.1 {
-  file delete -force test.db test.db-journal
+  forcedelete test.db test.db-journal
   sqlite3 db1 test.db
   db1 eval {
     PRAGMA encoding=UTF16;
diff --git a/test/shared4.test b/test/shared4.test
index f9f01738..83925b06 100644
--- a/test/shared4.test
+++ b/test/shared4.test
@@ -30,10 +30,10 @@ set ::enable_shared_cache [sqlite3_enable_shared_cache 1]
 # Prepare multiple databases in shared cache mode.
 #
 do_test shared4-1.1 {
-  file delete -force test1.db test1.db-journal
-  file delete -force test2.db test2.db-journal
-  file delete -force test3.db test3.db-journal
-  file delete -force test4.db test4.db-journal
+  forcedelete test1.db test1.db-journal
+  forcedelete test2.db test2.db-journal
+  forcedelete test3.db test3.db-journal
+  forcedelete test4.db test4.db-journal
   sqlite3 db1 test1.db
   sqlite3 db2 test2.db
   sqlite3 db3 test3.db
diff --git a/test/shared6.test b/test/shared6.test
index 4d38b22e..499cbb0e 100644
--- a/test/shared6.test
+++ b/test/shared6.test
@@ -235,7 +235,7 @@ do_test shared6-3.X {
 } {}
 
 do_test shared6-4.1 {
-  #file delete -force test.db test.db-journal
+  #forcedelete test.db test.db-journal
   sqlite3 db1 test.db
   sqlite3 db2 test.db
 
diff --git a/test/shared7.test b/test/shared7.test
index d003f0ae..5c4a1da2 100644
--- a/test/shared7.test
+++ b/test/shared7.test
@@ -35,7 +35,7 @@ do_test shared7-1.2 {
 } {1 {database is already attached}}
 
 do_test shared7-1.3 {
-  file delete -force test2.db test2.db-journal
+  forcedelete test2.db test2.db-journal
   db eval {
     ATTACH 'test2.db' AS test2;
     CREATE TABLE test2.t2(y);
diff --git a/test/speed3.test b/test/speed3.test
index a99a6245..1beaeb74 100644
--- a/test/speed3.test
+++ b/test/speed3.test
@@ -116,7 +116,7 @@ proc reset_db {} {
   }
 }
 
-file delete -force test2.db test2.db-journal
+forcedelete test2.db test2.db-journal
 reset_db
 
 # Set up a database in auto-vacuum mode and create a database schema.
diff --git a/test/sqllimits1.test b/test/sqllimits1.test
index bf4a2626..2cbad3ff 100644
--- a/test/sqllimits1.test
+++ b/test/sqllimits1.test
@@ -319,18 +319,22 @@ do_test sqllimits1-5.14.4 {
   catch {sqlite3_bind_text $::STMT 1 $::str1 -1} res
   set res
 } {SQLITE_TOOBIG}
-do_test sqllimits1-5.14.5 {
-  catch {sqlite3_bind_text16 $::STMT 1 $::str1 -1} res
-  set res
-} {SQLITE_TOOBIG}
+ifcapable utf16 {
+  do_test sqllimits1-5.14.5 {
+    catch {sqlite3_bind_text16 $::STMT 1 $::str1 -1} res
+    set res
+  } {SQLITE_TOOBIG}
+}
 do_test sqllimits1-5.14.6 {
   catch {sqlite3_bind_text $::STMT 1 $::str1 $np1} res
   set res
 } {SQLITE_TOOBIG}
-do_test sqllimits1-5.14.7 {
-  catch {sqlite3_bind_text16 $::STMT 1 $::str1 $np1} res
-  set res
-} {SQLITE_TOOBIG}
+ifcapable utf16 {
+  do_test sqllimits1-5.14.7 {
+    catch {sqlite3_bind_text16 $::STMT 1 $::str1 $np1} res
+    set res
+  } {SQLITE_TOOBIG}
+}
 do_test sqllimits1-5.14.8 {
   set n [expr {$np1-1}]
   catch {sqlite3_bind_text $::STMT 1 $::str1 $n} res
@@ -755,7 +759,7 @@ ifcapable attach {
   do_test sqllimits1-12.1 {
     set max $::SQLITE_MAX_ATTACHED
     for {set i 0} {$i < ($max)} {incr i} {
-      file delete -force test${i}.db test${i}.db-journal
+      forcedelete test${i}.db test${i}.db-journal
     }
     for {set i 0} {$i < ($max)} {incr i} {
       execsql "ATTACH 'test${i}.db' AS aux${i}"
diff --git a/test/stat.test b/test/stat.test
index e1aeaa9e..21726eb2 100644
--- a/test/stat.test
+++ b/test/stat.test
@@ -36,7 +36,8 @@ ifcapable wal {
   do_execsql_test stat-0.1 {
     PRAGMA journal_mode = WAL;
     PRAGMA journal_mode = delete;
-    SELECT * FROM stat;
+    SELECT name, path, pageno, pagetype, ncell, payload, unused, mx_payload
+      FROM stat;
   } {wal delete sqlite_master / 1 leaf 0 0 916 0}
 }
 
@@ -50,17 +51,20 @@ do_test stat-1.0 {
 } {}
 do_test stat-1.1 {
   execsql {
-    SELECT * FROM stat WHERE name = 't1';
+    SELECT name, path, pageno, pagetype, ncell, payload, unused, mx_payload
+      FROM stat WHERE name = 't1';
   }
 } {t1 / 2 leaf 2 10 998 5}
 do_test stat-1.2 {
   execsql {
-    SELECT * FROM stat WHERE name = 'i1';
+    SELECT name, path, pageno, pagetype, ncell, payload, unused, mx_payload
+      FROM stat WHERE name = 'i1';
   }
 } {i1 / 3 leaf 2 10 1000 5}
 do_test stat-1.3 {
   execsql {
-    SELECT * FROM stat WHERE name = 'sqlite_master';
+    SELECT name, path, pageno, pagetype, ncell, payload, unused, mx_payload
+      FROM stat WHERE name = 'sqlite_master';
   }
 } {sqlite_master / 1 leaf 2 77 831 40}
 do_test stat-1.4 {
@@ -77,7 +81,8 @@ do_execsql_test stat-2.1 {
   INSERT INTO t3 SELECT a_string(110+rowid), a_string(221+rowid) FROM t3;
   INSERT INTO t3 SELECT a_string(110+rowid), a_string(221+rowid) FROM t3;
   INSERT INTO t3 SELECT a_string(110+rowid), a_string(221+rowid) FROM t3;
-  SELECT * FROM stat WHERE name != 'sqlite_master';
+  SELECT name, path, pageno, pagetype, ncell, payload, unused, mx_payload
+    FROM stat WHERE name != 'sqlite_master';
 } [list \
   sqlite_autoindex_t3_1 / 3 internal 3 368 623 125       \
   sqlite_autoindex_t3_1 /000/ 8 leaf 8 946 46 123        \
@@ -108,7 +113,8 @@ do_execsql_test stat-3.1 {
   CREATE TABLE t4(x);
   CREATE INDEX i4 ON t4(x);
   INSERT INTO t4(rowid, x) VALUES(2, a_string(7777));
-  SELECT * FROM stat WHERE name != 'sqlite_master';
+  SELECT name, path, pageno, pagetype, ncell, payload, unused, mx_payload
+    FROM stat WHERE name != 'sqlite_master';
 } [list \
   i4 / 3 leaf 1 103 905 7782                 \
   i4 /000+000000 9 overflow 0 1020 0 0       \
@@ -132,14 +138,15 @@ do_execsql_test stat-3.1 {
 do_execsql_test stat-4.1 {
   CREATE TABLE t5(x);
   CREATE INDEX i5 ON t5(x);
-  SELECT * FROM stat WHERE name = 't5' OR name = 'i5';
+  SELECT name, path, pageno, pagetype, ncell, payload, unused, mx_payload
+    FROM stat WHERE name = 't5' OR name = 'i5';
 } [list  \
   i5 / 5 leaf 0 0 1016 0 \
   t5 / 4 leaf 0 0 1016 0 \
 ]
 
 db close
-file delete -force test.db
+forcedelete test.db
 sqlite3 db test.db
 register_dbstat_vtab db
 breakpoint
@@ -149,7 +156,8 @@ do_execsql_test stat-5.1 {
   CREATE TABLE t1(x);
   INSERT INTO t1 VALUES(zeroblob(1513));
   INSERT INTO t1 VALUES(zeroblob(1514));
-  SELECT * FROM stat WHERE name = 't1';
+  SELECT name, path, pageno, pagetype, ncell, payload, unused, mx_payload
+    FROM stat WHERE name = 't1';
 } [list \
   t1 / 2 leaf 2 993 5 1517                \
   t1 /000+000000 3 overflow 0 1020 0 0    \
diff --git a/test/subquery2.test b/test/subquery2.test
new file mode 100644
index 00000000..04200046
--- /dev/null
+++ b/test/subquery2.test
@@ -0,0 +1,86 @@
+# 2011 September 16
+#
+# The author disclaims copyright to this source code.  In place of
+# a legal notice, here is a blessing:
+#
+#    May you do good and not evil.
+#    May you find forgiveness for yourself and forgive others.
+#    May you share freely, never taking more than you give.
+#
+#*************************************************************************
+# This file implements regression tests for SQLite library.  The
+# focus of this script is testing correlated subqueries
+#
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+ifcapable !subquery {
+  finish_test
+  return
+}
+
+do_test subquery2-1.1 {
+  execsql {
+    BEGIN;
+    CREATE TABLE t1(a,b);
+    INSERT INTO t1 VALUES(1,2);
+    INSERT INTO t1 VALUES(3,4);
+    INSERT INTO t1 VALUES(5,6);
+    INSERT INTO t1 VALUES(7,8);
+    CREATE TABLE t2(c,d);
+    INSERT INTO t2 VALUES(1,1);
+    INSERT INTO t2 VALUES(3,9);
+    INSERT INTO t2 VALUES(5,25);
+    INSERT INTO t2 VALUES(7,49);
+    CREATE TABLE t3(e,f);
+    INSERT INTO t3 VALUES(1,1);
+    INSERT INTO t3 VALUES(3,27);
+    INSERT INTO t3 VALUES(5,125);
+    INSERT INTO t3 VALUES(7,343);
+    COMMIT;
+  }
+  execsql {
+    SELECT a FROM t1
+     WHERE b IN (SELECT x+1 FROM (SELECT DISTINCT f/(a*a) AS x FROM t3));
+  }
+} {1 3 5 7}
+do_test subquery2-1.2 {
+  execsql {
+    CREATE INDEX t1b ON t1(b);
+    SELECT a FROM t1
+     WHERE b IN (SELECT x+1 FROM (SELECT DISTINCT f/(a*a) AS x FROM t3));
+  }
+} {1 3 5 7}
+
+do_test subquery2-1.11 {
+  execsql {
+    SELECT a FROM t1
+     WHERE +b=(SELECT x+1 FROM (SELECT DISTINCT f/(a*a) AS x FROM t3));
+  }
+} {1}
+do_test subquery2-1.12 {
+  execsql {
+    SELECT a FROM t1
+     WHERE b=(SELECT x+1 FROM (SELECT DISTINCT f/(a*a) AS x FROM t3));
+  }
+} {1}
+
+do_test subquery2-1.21 {
+  execsql {
+    SELECT a FROM t1
+     WHERE +b=(SELECT x+1 FROM 
+                 (SELECT DISTINCT f/d AS x FROM t2 JOIN t3 ON d*a=f))
+  }
+} {1 3 5 7}
+do_test subquery2-1.22 {
+  execsql {
+    SELECT a FROM t1
+     WHERE b=(SELECT x+1 FROM 
+                 (SELECT DISTINCT f/d AS x FROM t2 JOIN t3 ON d*a=f))
+  }
+} {1 3 5 7}
+
+
+finish_test
diff --git a/test/superlock.test b/test/superlock.test
index b12863f7..8155d929 100644
--- a/test/superlock.test
+++ b/test/superlock.test
@@ -48,6 +48,11 @@ do_execsql_test 1.1 {
   PRAGMA journal_mode = DELETE;
 } {delete}
 
+ifcapable !wal {
+  finish_test
+  return
+}
+
 do_test 1.2 { sqlite3demo_superlock unlock test.db } {unlock}
 do_catchsql_test 1.3 { SELECT * FROM t1 } {1 {database is locked}}
 do_test 1.4 { unlock } {}
diff --git a/test/sync.test b/test/sync.test
index 4b02ad72..14252b5c 100644
--- a/test/sync.test
+++ b/test/sync.test
@@ -42,8 +42,8 @@ proc cond_incr_sync_count {adj} {
 
 do_test sync-1.1 {
   set sqlite_sync_count 0
-  file delete -force test2.db
-  file delete -force test2.db-journal
+  forcedelete test2.db
+  forcedelete test2.db-journal
   execsql {
     PRAGMA fullfsync=OFF;
     CREATE TABLE t1(a,b);
diff --git a/test/syscall.test b/test/syscall.test
index 4442612a..201bd636 100644
--- a/test/syscall.test
+++ b/test/syscall.test
@@ -59,7 +59,7 @@ do_test 2.1.2 { test_syscall exists nosuchcall } 0
 foreach s {
     open close access getcwd stat fstat ftruncate
     fcntl read pread write pwrite fchmod fallocate
-    pread64 pwrite64
+    pread64 pwrite64 unlink openDirectory
 } {
   if {[test_syscall exists $s]} {lappend syscall_list $s}
 }
diff --git a/test/table.test b/test/table.test
index 5fa91166..4826cb92 100644
--- a/test/table.test
+++ b/test/table.test
@@ -260,6 +260,18 @@ do_test table-5.2 {
   catchsql {DROP TABLE IF EXISTS sqlite_master}
 } {1 {table sqlite_master may not be dropped}}
 
+# Dropping sqlite_statN tables is OK.
+#
+do_test table-5.2.1 {
+  db eval {
+    ANALYZE;
+    DROP TABLE IF EXISTS sqlite_stat1;
+    DROP TABLE IF EXISTS sqlite_stat2;
+    DROP TABLE IF EXISTS sqlite_stat3;
+    SELECT name FROM sqlite_master WHERE name GLOB 'sqlite_stat*';
+  }
+} {}
+
 # Make sure an EXPLAIN does not really create a new table
 #
 do_test table-5.3 {
@@ -667,8 +679,8 @@ ifcapable attach {
   # Now attach a database and ensure that a table can be created in the 
   # attached database whilst in a callback from a query on the main database.
   do_test table-14.3 {
-    file delete -force test2.db
-    file delete -force test2.db-journal
+    forcedelete test2.db
+    forcedelete test2.db-journal
     execsql {
       ATTACH 'test2.db' as aux;
     }
diff --git a/test/tclsqlite.test b/test/tclsqlite.test
index 8db04ebf..0ed06024 100644
--- a/test/tclsqlite.test
+++ b/test/tclsqlite.test
@@ -617,5 +617,16 @@ ifcapable tclvar {
   } {31323334 blob}
 }
 
+db func xCall xCall
+proc xCall {} { return "value" }
+do_execsql_test tcl-14.1 {
+  CREATE TABLE t6(x);
+  INSERT INTO t6 VALUES(1);
+}
+do_test tcl-14.2 {
+  db one {SELECT x FROM t6 WHERE xCall()!='value'}
+} {}
+
+
 
 finish_test
diff --git a/test/temptable.test b/test/temptable.test
index ad85f7e9..5eeb0f57 100644
--- a/test/temptable.test
+++ b/test/temptable.test
@@ -292,6 +292,7 @@ do_test temptable-5.1 {
   execsql {
     CREATE TEMP TABLE mask(a,b,c)
   } db2
+  if {[permutation]=="prepare"} { db2 cache flush }
   execsql {
     CREATE INDEX mask ON t2(x);
     SELECT * FROM t2;
@@ -403,7 +404,7 @@ do_test temptable-6.8 {
   }
 } {1 {no such table: t9}}
 
-file delete -force test2.db test2.db-journal
+forcedelete test2.db test2.db-journal
 ifcapable attach {
   do_test temptable-7.1 {
     catchsql {
@@ -414,14 +415,14 @@ ifcapable attach {
 }
 
 # Need to do the following for tcl 8.5 on mac. On that configuration, the
-# -readonly flag is taken so seriously that a subsequent [file delete -force]
+# -readonly flag is taken so seriously that a subsequent [forcedelete]
 # (required before the next test file can be executed) will fail.
 #
 catch {file attributes test.db -readonly 0}
 
 do_test temptable-8.0 {
   db close
-  catch {file delete -force test.db}
+  catch {forcedelete test.db}
   sqlite3 db test.db
 } {}
 do_test temptable-8.1 {
diff --git a/test/temptrigger.test b/test/temptrigger.test
index ececc4a8..ed1efb91 100644
--- a/test/temptrigger.test
+++ b/test/temptrigger.test
@@ -157,8 +157,8 @@ sqlite3_enable_shared_cache $::enable_shared_cache
 #   temptrigger-3.4: Check that the temp trigger can be dropped without error.
 # 
 do_test temptrigger-3.1 {
-  catch { file delete -force test2.db test2.db-journal }
-  catch { file delete -force test.db test.db-journal }
+  catch { forcedelete test2.db test2.db-journal }
+  catch { forcedelete test.db test.db-journal }
   sqlite3 db test.db 
   sqlite3 db2 test2.db 
   execsql { CREATE TABLE t2(a, b) } db2
diff --git a/test/tester.tcl b/test/tester.tcl
index 8624821a..3c34b45d 100644
--- a/test/tester.tcl
+++ b/test/tester.tcl
@@ -20,7 +20,9 @@
 # Commands to manipulate the db and the file-system at a high level:
 #
 #      copy_file              FROM TO
-#      drop_all_table         ?DB?
+#      delete_file            FILENAME
+#      drop_all_tables        ?DB?
+#      forcecopy              FROM TO
 #      forcedelete            FILENAME
 #
 # Test the capability of the SQLite version built into the interpreter to
@@ -123,6 +125,121 @@ if {[info command sqlite_orig]==""} {
   }
 }
 
+proc getFileRetries {} {
+  if {![info exists ::G(file-retries)]} {
+    #
+    # NOTE: Return the default number of retries for [file] operations.  A
+    #       value of zero or less here means "disabled".
+    #
+    return [expr {$::tcl_platform(platform) eq "windows" ? 10 : 0}]
+  }
+  return $::G(file-retries)
+}
+
+proc getFileRetryDelay {} {
+  if {![info exists ::G(file-retry-delay)]} {
+    #
+    # NOTE: Return the default number of milliseconds to wait when retrying
+    #       failed [file] operations.  A value of zero or less means "do not
+    #       wait".
+    #
+    return 100; # TODO: Good default?
+  }
+  return $::G(file-retry-delay)
+}
+
+# Copy file $from into $to. This is used because some versions of
+# TCL for windows (notably the 8.4.1 binary package shipped with the
+# current mingw release) have a broken "file copy" command.
+#
+proc copy_file {from to} {
+  do_copy_file false $from $to
+}
+
+proc forcecopy {from to} {
+  do_copy_file true $from $to
+}
+
+proc do_copy_file {force from to} {
+  set nRetry [getFileRetries]     ;# Maximum number of retries.
+  set nDelay [getFileRetryDelay]  ;# Delay in ms before retrying.
+
+  # On windows, sometimes even a [file copy -force] can fail. The cause is
+  # usually "tag-alongs" - programs like anti-virus software, automatic backup
+  # tools and various explorer extensions that keep a file open a little longer
+  # than we expect, causing the delete to fail.
+  #
+  # The solution is to wait a short amount of time before retrying the copy.
+  #
+  if {$nRetry > 0} {
+    for {set i 0} {$i<$nRetry} {incr i} {
+      set rc [catch {
+        if {$force} {
+          file copy -force $from $to
+        } else {
+          file copy $from $to
+        }
+      } msg]
+      if {$rc==0} break
+      if {$nDelay > 0} { after $nDelay }
+    }
+    if {$rc} { error $msg }
+  } else {
+    if {$force} {
+      file copy -force $from $to
+    } else {
+      file copy $from $to
+    }
+  }
+}
+
+# Delete a file or directory
+#
+proc delete_file {args} {
+  do_delete_file false {*}$args
+}
+
+proc forcedelete {args} {
+  do_delete_file true {*}$args
+}
+
+proc do_delete_file {force args} {
+  set nRetry [getFileRetries]     ;# Maximum number of retries.
+  set nDelay [getFileRetryDelay]  ;# Delay in ms before retrying.
+
+  foreach filename $args {
+    # On windows, sometimes even a [file delete -force] can fail just after
+    # a file is closed. The cause is usually "tag-alongs" - programs like
+    # anti-virus software, automatic backup tools and various explorer
+    # extensions that keep a file open a little longer than we expect, causing
+    # the delete to fail.
+    #
+    # The solution is to wait a short amount of time before retrying the
+    # delete.
+    #
+    if {$nRetry > 0} {
+      for {set i 0} {$i<$nRetry} {incr i} {
+        set rc [catch {
+          if {$force} {
+            file delete -force $filename
+          } else {
+            file delete $filename
+          }
+        } msg]
+        if {$rc==0} break
+        if {$nDelay > 0} { after $nDelay }
+      }
+      if {$rc} { error $msg }
+    } else {
+      if {$force} {
+        file delete -force $filename
+      } else {
+        file delete $filename
+      }
+    }
+  }
+}
+
 proc execpresql {handle args} {
   trace remove execution $handle enter [list execpresql $handle]
   if {[info exists ::G(perm:presql)]} {
@@ -154,6 +271,8 @@ if {[info exists cmdlinearg]==0} {
   #   --backtrace=N
   #   --binarylog=N
   #   --soak=N
+  #   --file-retries=N
+  #   --file-retry-delay=N
   #   --start=[$permutation:]$testfile
   #
   set cmdlinearg(soft-heap-limit)    0
@@ -162,6 +281,8 @@ if {[info exists cmdlinearg]==0} {
   set cmdlinearg(backtrace)         10
   set cmdlinearg(binarylog)          0
   set cmdlinearg(soak)               0
+  set cmdlinearg(file-retries)       0
+  set cmdlinearg(file-retry-delay)   0
   set cmdlinearg(start)             "" 
 
   set leftover [list]
@@ -197,6 +318,14 @@ if {[info exists cmdlinearg]==0} {
         foreach {dummy cmdlinearg(soak)} [split $a =] break
         set ::G(issoak) $cmdlinearg(soak)
       }
+      {^-+file-retries=.+$} {
+        foreach {dummy cmdlinearg(file-retries)} [split $a =] break
+        set ::G(file-retries) $cmdlinearg(file-retries)
+      }
+      {^-+file-retry-delay=.+$} {
+        foreach {dummy cmdlinearg(file-retry-delay)} [split $a =] break
+        set ::G(file-retry-delay) $cmdlinearg(file-retry-delay)
+      }
       {^-+start=.+$} {
         foreach {dummy cmdlinearg(start)} [split $a =] break
 
@@ -246,9 +375,9 @@ sqlite3_soft_heap_limit $cmdlinearg(soft-heap-limit)
 #
 proc reset_db {} {
   catch {db close}
-  file delete -force test.db
-  file delete -force test.db-journal
-  file delete -force test.db-wal
+  forcedelete test.db
+  forcedelete test.db-journal
+  forcedelete test.db-wal
   sqlite3 db ./test.db
   set ::DB [sqlite3_connection_pointer db]
   if {[info exists ::SETUP_SQL]} {
@@ -622,10 +751,10 @@ proc finalize_testing {} {
     }
   }
   foreach f [glob -nocomplain test.db-*-journal] {
-    file delete -force $f
+    forcedelete $f
   }
   foreach f [glob -nocomplain test.db-mj*] {
-    file delete -force $f
+    forcedelete $f
   }
   exit [expr {$nErr>0}]
 }
@@ -740,30 +869,6 @@ proc stepsql {dbptr sql} {
   return $r
 }
 
-# Delete a file or directory
-#
-proc forcedelete {args} {
-  foreach filename $args {
-    # On windows, sometimes even a [file delete -force] can fail just after
-    # a file is closed. The cause is usually "tag-alongs" - programs like
-    # anti-virus software, automatic backup tools and various explorer
-    # extensions that keep a file open a little longer than we expect, causing
-    # the delete to fail.
-    #
-    # The solution is to wait a short amount of time before retrying the 
-    # delete.
-    #
-    set nRetry  50                  ;# Maximum number of retries.
-    set nDelay 100                  ;# Delay in ms before retrying.
-    for {set i 0} {$i<$nRetry} {incr i} {
-      set rc [catch {file delete -force $filename} msg]
-      if {$rc==0} break
-      after $nDelay
-    }
-    if {$rc} { error $msg }
-  }
-}
-
 # Do an integrity check of the entire database
 #
 proc integrity_check {name {db db}} {
@@ -964,10 +1069,10 @@ proc do_ioerr_test {testname args} {
       set ::sqlite_io_error_pending 0
       catch {db close}
       catch {db2 close}
-      catch {file delete -force test.db}
-      catch {file delete -force test.db-journal}
-      catch {file delete -force test2.db}
-      catch {file delete -force test2.db-journal}
+      catch {forcedelete test.db}
+      catch {forcedelete test.db-journal}
+      catch {forcedelete test2.db}
+      catch {forcedelete test2.db-journal}
       set ::DB [sqlite3 db test.db; sqlite3_connection_pointer db]
       sqlite3_extended_result_codes $::DB $::ioerropts(-erc)
       if {[info exists ::ioerropts(-tclprep)]} {
@@ -1241,24 +1346,6 @@ proc memdebug_log_sql {{filename mallocs.sql}} {
   close $fd
 }
 
-# Copy file $from into $to. This is used because some versions of
-# TCL for windows (notably the 8.4.1 binary package shipped with the
-# current mingw release) have a broken "file copy" command.
-#
-proc copy_file {from to} {
-  if {$::tcl_platform(platform)=="unix"} {
-    file copy -force $from $to
-  } else {
-    set f [open $from]
-    fconfigure $f -translation binary
-    set t [open $to w]
-    fconfigure $t -translation binary
-    puts -nonewline $t [read $f [file size $from]]
-    close $t
-    close $f
-  }
-}
-
 # Drop all tables in database [db]
 proc drop_all_tables {{db db}} {
   ifcapable trigger&&foreignkey {
@@ -1440,7 +1527,7 @@ proc db_save {} {
   foreach f [glob -nocomplain sv_test.db*] { forcedelete $f }
   foreach f [glob -nocomplain test.db*] {
     set f2 "sv_$f"
-    file copy -force $f $f2
+    forcecopy $f $f2
   }
 }
 proc db_save_and_close {} {
@@ -1452,7 +1539,7 @@ proc db_restore {} {
   foreach f [glob -nocomplain test.db*] { forcedelete $f }
   foreach f2 [glob -nocomplain sv_test.db*] {
     set f [string range $f2 3 end]
-    file copy -force $f2 $f
+    forcecopy $f2 $f
   }
 }
 proc db_restore_and_reopen {{dbfile test.db}} {
@@ -1462,7 +1549,7 @@ proc db_restore_and_reopen {{dbfile test.db}} {
 }
 proc db_delete_and_reopen {{file test.db}} {
   catch { db close }
-  foreach f [glob -nocomplain test.db*] { file delete -force $f }
+  foreach f [glob -nocomplain test.db*] { forcedelete $f }
   sqlite3 db $file
 }
 
diff --git a/test/thread001.test b/test/thread001.test
index 9b788aaf..7e0893f2 100644
--- a/test/thread001.test
+++ b/test/thread001.test
@@ -42,7 +42,7 @@ foreach {tn same_db shared_cache} [list \
     sqlite3_enable_shared_cache $shared_cache
     sqlite3_enable_shared_cache $shared_cache
   } $shared_cache
-  sqlite3 db test.db -fullmutex 1
+  sqlite3 db test.db -fullmutex 1 -key xyzzy
 
   set dbconfig ""
   if {$same_db} {
@@ -77,7 +77,7 @@ foreach {tn same_db shared_cache} [list \
     #sqlthread parent {puts STARTING..}
     set needToClose 0
     if {![info exists ::DB]} {
-      set ::DB [sqlthread open test.db]
+      set ::DB [sqlthread open test.db xyzzy]
       #sqlthread parent "puts \"OPEN $::DB\""
       set needToClose 1
     }
diff --git a/test/thread002.test b/test/thread002.test
index b1e5f636..b39c9ae7 100644
--- a/test/thread002.test
+++ b/test/thread002.test
@@ -16,9 +16,11 @@
 
 set testdir [file dirname $argv0]
 
+set do_not_use_codec 1
 source $testdir/tester.tcl
 if {[run_thread_tests]==0} { finish_test ; return }
 
+
 db close
 set ::enable_shared_cache [sqlite3_enable_shared_cache 1]
 
@@ -27,7 +29,7 @@ set ::NTHREAD 10
 do_test thread002.1 {
   # Create 3 databases with identical schemas:
   for {set ii 0} {$ii < 3} {incr ii} {
-    file delete -force test${ii}.db
+    forcedelete test${ii}.db
     sqlite3 db test${ii}.db
     execsql {
       CREATE TABLE t1(k, v);
diff --git a/test/thread003.test b/test/thread003.test
index 8aa513af..8c7440c8 100644
--- a/test/thread003.test
+++ b/test/thread003.test
@@ -40,7 +40,7 @@ do_test thread003.1.2 {
 } {1}
 do_test thread003.1.3 {
   db close
-  file delete -force test2.db
+  forcedelete test2.db
   sqlite3 db test2.db
 } {}
 do_test thread003.1.4 {
@@ -80,7 +80,7 @@ do_test thread003.2 {
   foreach zFile {test.db test2.db} {
     set SCRIPT [format {
       set iEnd [expr {[clock_seconds] + %d}]
-      set ::DB [sqlthread open %s]
+      set ::DB [sqlthread open %s xyzzy]
   
       # Set the cache size to 15 pages per cache. 30 available globally.
       execsql { PRAGMA cache_size = 15 }
@@ -117,7 +117,7 @@ do_test thread003.3 {
     set SCRIPT [format {
       set iStart [clock_seconds]
       set iEnd [expr {[clock_seconds] + %d}]
-      set ::DB [sqlthread open %s]
+      set ::DB [sqlthread open %s xyzzy]
   
       # Set the cache size to 15 pages per cache. 30 available globally.
       execsql { PRAGMA cache_size = 15 }
@@ -156,7 +156,7 @@ unset -nocomplain finished(2)
 do_test thread003.4 {
   thread_spawn finished(1) $thread_procs [format {
     set iEnd [expr {[clock_seconds] + %d}]
-    set ::DB [sqlthread open test.db]
+    set ::DB [sqlthread open test.db xyzzy]
 
     # Set the cache size to 15 pages per cache. 30 available globally.
     execsql { PRAGMA cache_size = 15 }
diff --git a/test/thread005.test b/test/thread005.test
index 9253287d..89cbfe76 100644
--- a/test/thread005.test
+++ b/test/thread005.test
@@ -121,7 +121,7 @@ for {set ii 2} {$ii < 500} {incr ii} {
 # switch or something...
 #
 
-file delete -force test.db test2.db
+forcedelete test.db test2.db
 unset -nocomplain finished
 
 do_test thread005-2.1 {
diff --git a/test/tkt-2d1a5c67d.test b/test/tkt-2d1a5c67d.test
index 278e1d38..bf9595f0 100644
--- a/test/tkt-2d1a5c67d.test
+++ b/test/tkt-2d1a5c67d.test
@@ -118,8 +118,8 @@ do_test 3.5 {
 #
 forcedelete test.db2-wal test.db2
 do_test 3.6 {
-  file copy test.db-wal test.db2-wal
-  file copy test.db test.db2
+  copy_file test.db-wal test.db2-wal
+  copy_file test.db test.db2
   sqlite3 db2 test.db2
   execsql { SELECT * FROM t4 WHERE a = 'xyz' } db2
 } {xyz}
diff --git a/test/tkt-31338dca7e.test b/test/tkt-31338dca7e.test
index 3f66816d..9423c684 100644
--- a/test/tkt-31338dca7e.test
+++ b/test/tkt-31338dca7e.test
@@ -74,4 +74,105 @@ do_test tkt-31338-2.2 {
 } {111 222 222 333 888 333 444 444 555 888 333 444 444 555 999}
 
 
+# Ticket [2c2de252666662f5459904fc33a9f2956cbff23c]
+#
+do_test tkt-31338-3.1 {
+  foreach x [db eval {SELECT name FROM sqlite_master WHERE type='table'}] {
+     db eval "DROP TABLE $x"
+  }
+  db eval {
+    CREATE TABLE t1(a,b,c,d);
+    CREATE TABLE t2(e,f);
+    INSERT INTO t1 VALUES(1,2,3,4);
+    INSERT INTO t2 VALUES(10,-8);
+    CREATE INDEX t1a ON t1(a);
+    CREATE INDEX t1b ON t1(b);
+    CREATE TABLE t3(g);
+    INSERT INTO t3 VALUES(4);
+    CREATE TABLE t4(h);
+    INSERT INTO t4 VALUES(5);
+    
+    SELECT * FROM t3 LEFT JOIN t1 ON d=g LEFT JOIN t4 ON c=h
+     WHERE (a=1 AND h=4)
+         OR (b IN (
+               SELECT x FROM (SELECT e+f AS x, e FROM t2 ORDER BY 1 LIMIT 2)
+               GROUP BY e
+            ));
+  }    
+} {4 1 2 3 4 {}}
+do_test tkt-31338-3.2 {
+  db eval {    
+    SELECT * FROM t3 LEFT JOIN t1 ON d=g LEFT JOIN t4 ON c=h
+     WHERE (a=1 AND h=4)
+         OR (b=2 AND b NOT IN (
+               SELECT x+1 FROM (SELECT e+f AS x, e FROM t2 ORDER BY 1 LIMIT 2)
+               GROUP BY e
+            ));
+  }    
+} {4 1 2 3 4 {}}
+do_test tkt-31338-3.3 {
+  db eval {    
+    SELECT * FROM t3 LEFT JOIN t1 ON d=g LEFT JOIN t4 ON c=h
+     WHERE (+a=1 AND h=4)
+         OR (b IN (
+               SELECT x FROM (SELECT e+f AS x, e FROM t2 ORDER BY 1 LIMIT 2)
+               GROUP BY e
+            ));
+  }    
+} {4 1 2 3 4 {}}
+do_test tkt-31338-3.4 {
+  db eval {    
+    SELECT * FROM t3 LEFT JOIN t1 ON d=g LEFT JOIN t4 ON c=h
+     WHERE (a=1 AND h=4)
+         OR (+b IN (
+               SELECT x FROM (SELECT e+f AS x, e FROM t2 ORDER BY 1 LIMIT 2)
+               GROUP BY e
+            ));
+  }    
+} {4 1 2 3 4 {}}
+
+do_test tkt-31338-3.5 {
+  db eval {
+    CREATE TABLE t5(a,b,c,d,e,f);
+    CREATE TABLE t6(g,h);
+    CREATE TRIGGER t6r AFTER INSERT ON t6 BEGIN
+      INSERT INTO t5    
+        SELECT * FROM t3 LEFT JOIN t1 ON d=g LEFT JOIN t4 ON c=h
+         WHERE (a=1 AND h=4)
+            OR (b IN (
+               SELECT x FROM (SELECT e+f AS x, e FROM t2 ORDER BY 1 LIMIT 2)
+               GROUP BY e
+            ));
+    END;
+    INSERT INTO t6 VALUES(88,99);
+    SELECT * FROM t5;
+  }    
+} {4 1 2 3 4 {}}
+
+do_test tkt-31338-3.6 {
+  db eval {    
+    INSERT INTO t1 VALUES(2,4,3,4);
+    INSERT INTO t1 VALUES(99,101,3,4);
+    INSERT INTO t1 VALUES(98,97,3,4);
+    SELECT * FROM t3 LEFT JOIN t1 ON d=g LEFT JOIN t4 ON c=h
+     WHERE (a=1 AND h=4)
+         OR (b IN (
+               SELECT x+a FROM (SELECT e+f AS x, e FROM t2 ORDER BY 1 LIMIT 2)
+               GROUP BY e
+            ));
+  }    
+} {4 2 4 3 4 {} 4 99 101 3 4 {}}
+
+do_test tkt-31338-3.7 {
+  db eval {
+    SELECT * FROM t3 LEFT JOIN t1 ON d=g LEFT JOIN t4 ON c=h
+     WHERE (a=1 AND h=4)
+         OR (b IN (
+               SELECT x FROM (SELECT e+f+a AS x, e FROM t2 ORDER BY 1 LIMIT 2)
+               GROUP BY e
+            ));
+  }    
+} {4 2 4 3 4 {} 4 99 101 3 4 {}}
+
+
 finish_test
diff --git a/test/tkt-54844eea3f.test b/test/tkt-54844eea3f.test
new file mode 100644
index 00000000..7b04f693
--- /dev/null
+++ b/test/tkt-54844eea3f.test
@@ -0,0 +1,67 @@
+# 2011 July 8
+#
+# The author disclaims copyright to this source code.  In place of
+# a legal notice, here is a blessing:
+#
+#    May you do good and not evil.
+#    May you find forgiveness for yourself and forgive others.
+#    May you share freely, never taking more than you give.
+#
+#***********************************************************************
+# This file implements regression tests for SQLite library.  The
+# focus of this file is testing that bug [54844eea3f] has been fixed.
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+set ::testprefix tkt-54844eea3f
+
+do_test 1.0 {
+  execsql {
+    CREATE TABLE t1(a INTEGER PRIMARY KEY);
+    INSERT INTO t1 VALUES(1);
+    INSERT INTO t1 VALUES(4);
+
+    CREATE TABLE t2(b INTEGER PRIMARY KEY);
+    INSERT INTO t2 VALUES(1);
+    INSERT INTO t2 VALUES(2);
+    INSERT INTO t2 SELECT b+2 FROM t2;
+    INSERT INTO t2 SELECT b+4 FROM t2;
+    INSERT INTO t2 SELECT b+8 FROM t2;
+    INSERT INTO t2 SELECT b+16 FROM t2;
+
+    CREATE TABLE t3(c INTEGER PRIMARY KEY);
+    INSERT INTO t3 VALUES(1);
+    INSERT INTO t3 VALUES(2);
+    INSERT INTO t3 VALUES(3);
+  }
+} {}
+
+do_test 1.1 {
+  execsql {
+    SELECT 'test-2', t3.c, (
+          SELECT count(*) 
+          FROM t1 JOIN (SELECT DISTINCT t3.c AS p FROM t2) AS x ON t1.a=x.p
+    )
+    FROM t3;
+  }
+} {test-2 1 1 test-2 2 0 test-2 3 0}
+
+do_test 1.2 {
+  execsql {
+    CREATE TABLE t4(a, b, c);
+    INSERT INTO t4 VALUES('a', 1, 'one');
+    INSERT INTO t4 VALUES('a', 2, 'two');
+    INSERT INTO t4 VALUES('b', 1, 'three');
+    INSERT INTO t4 VALUES('b', 2, 'four');
+    SELECT ( 
+      SELECT c FROM (
+        SELECT * FROM t4 WHERE a=out.a ORDER BY b LIMIT 10 OFFSET 1
+      ) WHERE b=out.b
+    ) FROM t4 AS out;
+  }
+} {{} two {} four}
+
+
+finish_test
diff --git a/test/tkt-5ee23731f.test b/test/tkt-5ee23731f.test
index 61c99741..761382a4 100644
--- a/test/tkt-5ee23731f.test
+++ b/test/tkt-5ee23731f.test
@@ -19,7 +19,7 @@ source $testdir/tester.tcl
 
 do_test tkt-5ee237-1.1 {
   db close
-  file delete -force test.db
+  forcedelete test.db
   sqlite3 db test.db
   db eval {
     CREATE TABLE t1(x UNIQUE);
diff --git a/test/tkt-b1d3a2e531.test b/test/tkt-b1d3a2e531.test
new file mode 100644
index 00000000..54534b6c
--- /dev/null
+++ b/test/tkt-b1d3a2e531.test
@@ -0,0 +1,109 @@
+# 2011 August 22
+#
+# The author disclaims copyright to this source code.  In place of
+# a legal notice, here is a blessing:
+#
+#    May you do good and not evil.
+#    May you find forgiveness for yourself and forgive others.
+#    May you share freely, never taking more than you give.
+#
+#***********************************************************************
+# This file implements regression tests for SQLite library.
+#
+# This file implements tests for foreign keys. Specifically, it tests
+# that ticket b1d3a2e531 has been fixed.
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+ifcapable {!foreignkey||!trigger} {
+  finish_test
+  return
+}
+set testprefix tkt-b1d3a2e531
+
+do_execsql_test 1.0 { PRAGMA foreign_keys = ON }
+
+do_execsql_test 1.1 {
+  CREATE TABLE pp(x PRIMARY KEY);
+  CREATE TABLE cc(y REFERENCES pp DEFERRABLE INITIALLY DEFERRED);
+  INSERT INTO pp VALUES('abc');
+  INSERT INTO cc VALUES('abc');
+}
+do_execsql_test 1.2 {
+  BEGIN;
+    DROP TABLE pp;
+    DROP TABLE cc;
+  COMMIT;
+}
+do_execsql_test 1.3 {
+  CREATE TABLE pp(x PRIMARY KEY);
+  CREATE TABLE cc(y REFERENCES pp DEFERRABLE INITIALLY DEFERRED);
+  INSERT INTO pp VALUES('abc');
+  INSERT INTO cc VALUES('abc');
+}
+do_execsql_test 1.4 {
+  BEGIN;
+    DROP TABLE cc;
+    DROP TABLE pp;
+  COMMIT;
+}
+
+do_execsql_test 2.1 {
+  CREATE TABLE pp(x PRIMARY KEY);
+  CREATE TABLE cc(
+    y INTEGER PRIMARY KEY REFERENCES pp DEFERRABLE INITIALLY DEFERRED
+  );
+  INSERT INTO pp VALUES(5);
+  INSERT INTO cc VALUES(5);
+}
+do_execsql_test 2.2 {
+  BEGIN;
+    DROP TABLE pp;
+    DROP TABLE cc;
+  COMMIT;
+}
+do_execsql_test 2.3 {
+  CREATE TABLE pp(x PRIMARY KEY);
+  CREATE TABLE cc(
+    y INTEGER PRIMARY KEY REFERENCES pp DEFERRABLE INITIALLY DEFERRED
+  );
+  INSERT INTO pp VALUES(5);
+  INSERT INTO cc VALUES(5);
+}
+do_execsql_test 2.4 {
+  BEGIN;
+    DROP TABLE cc;
+    DROP TABLE pp;
+  COMMIT;
+}
+
+do_execsql_test 3.1 {
+  CREATE TABLE pp1(x PRIMARY KEY);
+  CREATE TABLE cc1(y REFERENCES pp1 DEFERRABLE INITIALLY DEFERRED);
+
+  CREATE TABLE pp2(x PRIMARY KEY);
+  CREATE TABLE cc2(y REFERENCES pp1 DEFERRABLE INITIALLY DEFERRED);
+
+  INSERT INTO pp1 VALUES(2200);
+  INSERT INTO cc1 VALUES(NULL);
+
+  INSERT INTO pp2 VALUES(2200);
+  INSERT INTO cc2 VALUES(2200);
+}
+do_catchsql_test 3.2 {
+  BEGIN;
+    DELETE FROM pp2;
+    DROP TABLE pp1;
+    DROP TABLE cc1;
+  COMMIT;
+} {1 {foreign key constraint failed}}
+do_catchsql_test 3.3 {
+    DROP TABLE cc2;
+  COMMIT;
+} {0 {}}
+
+
+
+finish_test
diff --git a/test/tkt-c48d99d690.test b/test/tkt-c48d99d690.test
new file mode 100644
index 00000000..9b405799
--- /dev/null
+++ b/test/tkt-c48d99d690.test
@@ -0,0 +1,26 @@
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+set ::testprefix tkt-c48d99d690
+
+do_test 1.0 {
+  execsql {
+    CREATE TABLE t1(a, b);
+    CREATE TABLE t2(a, b);
+    INSERT INTO t1 VALUES('one'  , 1);
+    INSERT INTO t1 VALUES('two'  , 5);
+    INSERT INTO t1 VALUES('two'  , 2);
+    INSERT INTO t1 VALUES('three', 3);
+    PRAGMA count_changes = 1;
+  }
+} {}
+
+do_test 1.1 {
+  execsql { INSERT INTO t2 SELECT * FROM t1 }
+} {4}
+
+do_test 1.2 { execsql VACUUM } {}
+
+finish_test
+
diff --git a/test/tkt-cbd054fa6b.test b/test/tkt-cbd054fa6b.test
index 6e7455b3..180acf56 100644
--- a/test/tkt-cbd054fa6b.test
+++ b/test/tkt-cbd054fa6b.test
@@ -16,7 +16,7 @@
 set testdir [file dirname $argv0]
 source $testdir/tester.tcl
 
-ifcapable !stat2 {
+ifcapable !stat3 {
   finish_test
   return
 }
@@ -46,7 +46,7 @@ do_test tkt-cbd05-1.2 {
 do_test tkt-cbd05-1.3 {
   execsql { 
     SELECT tbl,idx,group_concat(sample,' ') 
-    FROM sqlite_stat2 
+    FROM sqlite_stat3 
     WHERE idx = 't1_x' 
     GROUP BY tbl,idx
   }
@@ -78,7 +78,7 @@ do_test tkt-cbd05-2.2 {
 do_test tkt-cbd05-2.3 {
   execsql { 
     SELECT tbl,idx,group_concat(sample,' ') 
-    FROM sqlite_stat2 
+    FROM sqlite_stat3 
     WHERE idx = 't1_x' 
     GROUP BY tbl,idx
   }
diff --git a/test/tkt-d635236375.test b/test/tkt-d635236375.test
new file mode 100644
index 00000000..3fc78226
--- /dev/null
+++ b/test/tkt-d635236375.test
@@ -0,0 +1,38 @@
+# 2011 August 3
+#
+# The author disclaims copyright to this source code.  In place of
+# a legal notice, here is a blessing:
+#
+#    May you do good and not evil.
+#    May you find forgiveness for yourself and forgive others.
+#    May you share freely, never taking more than you give.
+#
+#***********************************************************************
+# This file implements regression tests for SQLite library.  The
+# focus of this file is testing that bug [d63523637517386191d634e]
+# has been fixed.
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+set ::testprefix tkt-d635236375
+
+do_test 1.0 {
+  execsql {
+    CREATE TABLE t1(id1 INTEGER PRIMARY KEY);
+    INSERT INTO t1 VALUES(9999);
+    CREATE TABLE t2(id2 INTEGER PRIMARY KEY);
+    INSERT INTO t2 VALUES(12345);
+    INSERT INTO t2 VALUES(54321);
+    SELECT DISTINCT id1 AS x, id1 AS y FROM t1, t2;
+  }
+} {9999 9999}
+do_test 1.1 {
+  execsql {
+    SELECT count(*) FROM t1, t2 GROUP BY id1, id1;
+  }
+} {2}
+
+
+finish_test
diff --git a/test/tkt-f3e5abed55.test b/test/tkt-f3e5abed55.test
index 241c1612..b3f5d565 100644
--- a/test/tkt-f3e5abed55.test
+++ b/test/tkt-f3e5abed55.test
@@ -14,8 +14,8 @@ set testdir [file dirname $argv0]
 source $testdir/tester.tcl
 source $testdir/malloc_common.tcl
 
-foreach f [glob -nocomplain test.db*mj*] { file delete -force $f }
-file delete -force test.db2
+foreach f [glob -nocomplain test.db*mj*] { forcedelete $f }
+forcedelete test.db2
 
 do_test tkt-f3e5abed55-1.1 {
   execsql {
@@ -51,7 +51,7 @@ do_test tkt-f3e5abed55-1.5 {
 do_test tkt-f3e5abed55-1.6 {
   glob -nocomplain test.db*mj*
 } {}
-foreach f [glob -nocomplain test.db*mj*] { file delete -force $f }
+foreach f [glob -nocomplain test.db*mj*] { forcedelete $f }
 db close
 db2 close
 
diff --git a/test/tkt-fa7bf5ec.test b/test/tkt-fa7bf5ec.test
new file mode 100644
index 00000000..34f12b96
--- /dev/null
+++ b/test/tkt-fa7bf5ec.test
@@ -0,0 +1,39 @@
+# 2011 October 13
+#
+# The author disclaims copyright to this source code.  In place of
+# a legal notice, here is a blessing:
+#
+#    May you do good and not evil.
+#    May you find forgiveness for yourself and forgive others.
+#    May you share freely, never taking more than you give.
+#
+#***********************************************************************
+# This file implements regression tests for SQLite library. Specifically,
+# it tests that ticket [fa7bf5ec94801e7e2030e41eefe5d9dd96eaacfd] has
+# been resolved.
+#
+# The problem described by this ticket was that the sqlite3ExprCompare()
+# function was saying that expressions (x='a') and (x='A') were identical
+# because it was using sqlite3StrICmp() instead of strcmp() to compare string
+# literals.  That was causing the query optimizer for aggregate queries to 
+# believe that both count() operations were identical, and thus only 
+# computing the first count() and making a copy of the result for the 
+# second count().
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+do_test tkt-fa7bf5ec-1 {
+  execsql {
+    CREATE TABLE t1(x);
+    INSERT INTO t1 VALUES ('a');
+    INSERT INTO t1 VALUES ('A');
+    INSERT INTO t1 VALUES ('A');
+    SELECT count(CASE WHEN x='a' THEN 1 END),
+           count(CASE WHEN x='A' THEN 1 END)
+      FROM t1;
+  }
+} {1 2}
+
+finish_test
diff --git a/test/tkt1667.test b/test/tkt1667.test
index 9883a208..63815061 100644
--- a/test/tkt1667.test
+++ b/test/tkt1667.test
@@ -25,7 +25,7 @@ ifcapable !autovacuum||!tclvar {
 }
 
 db close
-file delete -force test.db test.db-journal
+forcedelete test.db test.db-journal
 
 # Set the pending byte offset such that the page it is on is
 # the first autovacuum pointer map page in the file (assume a page 
diff --git a/test/tkt1873.test b/test/tkt1873.test
index 85a52832..9930790c 100644
--- a/test/tkt1873.test
+++ b/test/tkt1873.test
@@ -24,7 +24,7 @@ ifcapable !attach {
   return
 }
 
-file delete -force test2.db test2.db-journal
+forcedelete test2.db test2.db-journal
 
 do_test tkt1873-1.1 {
   execsql {
diff --git a/test/tkt2686.test b/test/tkt2686.test
index c03c6868..20447bba 100644
--- a/test/tkt2686.test
+++ b/test/tkt2686.test
@@ -49,7 +49,7 @@ for {set i 1} {$i<2000} {incr i} {
 }
 
 db close
-file delete -force test.db test.db-journal
+forcedelete test.db test.db-journal
 sqlite3 db test.db
 
 db eval {
diff --git a/test/tkt2817.test b/test/tkt2817.test
index 46b7fe36..579cf2f7 100644
--- a/test/tkt2817.test
+++ b/test/tkt2817.test
@@ -48,7 +48,7 @@ integrity_check tkt2817-1.3
 # same name. #2817 did not cause a problem with these tests.
 #
 db close
-file delete -force test.db
+forcedelete test.db
 sqlite3 db test.db
 do_test tkt2817-2.0 {
   execsql {
diff --git a/test/tkt2820.test b/test/tkt2820.test
index 106c1e55..11c4cd3a 100644
--- a/test/tkt2820.test
+++ b/test/tkt2820.test
@@ -25,7 +25,7 @@ source $testdir/tester.tcl
 
 proc test_schema_change {testid init ddl res} {
   db close
-  file delete -force test.db test.db-journal
+  forcedelete test.db test.db-journal
   sqlite3 db test.db
   execsql $init
   do_test tkt2820-$testid.1 {
@@ -70,7 +70,7 @@ test_schema_change 3 {
 #
 do_test tkt2820-4.1 {
   db close
-  file delete -force test.db test.db-journal
+  forcedelete test.db test.db-journal
   sqlite3 db test.db
   db eval {
     CREATE TABLE t1(a INTEGER PRIMARY KEY);
diff --git a/test/tkt2854.test b/test/tkt2854.test
index 862524a7..914ddd1b 100644
--- a/test/tkt2854.test
+++ b/test/tkt2854.test
@@ -128,7 +128,7 @@ do_test tkt2854-1.18 {
 # attached db cannot be locked, the internal exclusive flag used by
 # shared-cache users is correctly cleared.
 do_test tkt2854-1.19 {
-  file delete -force test2.db test2.db-journal
+  forcedelete test2.db test2.db-journal
   sqlite3 db4 test2.db
   execsql { CREATE TABLE def(d, e, f) } db4
   execsql { ATTACH 'test2.db' AS aux } db
diff --git a/test/tkt3457.test b/test/tkt3457.test
index 71eb4246..7b9a1b35 100644
--- a/test/tkt3457.test
+++ b/test/tkt3457.test
@@ -46,8 +46,8 @@ do_test tkt3457-1.1 {
     INSERT INTO t1 VALUES(4, 5, 6);
   }
 
-  file copy -force test.db bak.db
-  file copy -force test.db-journal bak.db-journal
+  forcecopy test.db bak.db
+  forcecopy test.db-journal bak.db-journal
 
   # Fix the first journal-header in the journal-file. Because the
   # journal file has not yet been synced, the 8-byte magic string at the
@@ -63,23 +63,23 @@ do_test tkt3457-1.1 {
 } {}
 
 do_test tkt3457-1.2 {
-  file copy -force bak.db-journal test.db-journal
+  forcecopy bak.db-journal test.db-journal
   file attributes test.db-journal -permissions ---------
   catchsql { SELECT * FROM t1 }
 } {1 {unable to open database file}}
 do_test tkt3457-1.3 {
-  file copy -force bak.db-journal test.db-journal
+  forcecopy bak.db-journal test.db-journal
   file attributes test.db-journal -permissions -w--w--w-
   catchsql { SELECT * FROM t1 }
 } {1 {unable to open database file}}
 do_test tkt3457-1.4 {
-  file copy -force bak.db-journal test.db-journal
+  forcecopy bak.db-journal test.db-journal
   file attributes test.db-journal -permissions r--r--r--
   catchsql { SELECT * FROM t1 }
 } {1 {unable to open database file}}
 
 do_test tkt3457-1.5 {
-  file copy -force bak.db-journal test.db-journal
+  forcecopy bak.db-journal test.db-journal
   file attributes test.db-journal -permissions rw-rw-rw-
   catchsql { SELECT * FROM t1 }
 } {0 {1 2 3 4 5 6}}
diff --git a/test/tkt35xx.test b/test/tkt35xx.test
index d2a83cde..f9d10c30 100644
--- a/test/tkt35xx.test
+++ b/test/tkt35xx.test
@@ -50,7 +50,7 @@ do_test tkt35xx-1.1 {
 # Trigger the problem using statement rollback.
 #
 db close
-file delete test.db
+delete_file test.db
 sqlite3 db test.db
 set big [string repeat abcdefghij 22]    ;# 220 byte string
 do_test tkt35xx-1.2.1 {
diff --git a/test/tkt3793.test b/test/tkt3793.test
index 2b5f2bab..074aab2d 100644
--- a/test/tkt3793.test
+++ b/test/tkt3793.test
@@ -100,16 +100,18 @@ set x 0
 # Note: Before the bug was fixed, if [db2] was opened with the "-fullmutex 1"
 # option, then this test case would cause an assert() to fail.
 #
-set ::busyconnection db1
-db1 eval {SELECT * FROM t2 ORDER BY a LIMIT 20} {
-  do_test tkt3793-2.[incr x] { set ::busyconnection } db1
-  set ::busyconnection db2
-
-  db2 eval { SELECT count(*) FROM t2 }
-  do_test tkt3793-2.[incr x] { set ::busyconnection } db2
+ifcapable threadsafe {
   set ::busyconnection db1
+  db1 eval {SELECT * FROM t2 ORDER BY a LIMIT 20} {
+    do_test tkt3793-2.[incr x] { set ::busyconnection } db1
+    set ::busyconnection db2
+  
+    db2 eval { SELECT count(*) FROM t2 }
+    do_test tkt3793-2.[incr x] { set ::busyconnection } db2
+    set ::busyconnection db1
+  }
 }
-
+  
 do_test tkt3793-3 {
   db1 close
   db2 close
diff --git a/test/trigger1.test b/test/trigger1.test
index 622aff2d..dc344d4d 100644
--- a/test/trigger1.test
+++ b/test/trigger1.test
@@ -534,8 +534,8 @@ ifcapable conflict {
 # example, that you can drop and re-create tables referenced by triggers. 
 ifcapable tempdb&&attach {
   do_test trigger1-10.0 {
-    file delete -force test2.db
-    file delete -force test2.db-journal
+    forcedelete test2.db
+    forcedelete test2.db-journal
     execsql {
       ATTACH 'test2.db' AS aux;
     }
diff --git a/test/trigger4.test b/test/trigger4.test
index 0e44ce6c..a05a5e73 100644
--- a/test/trigger4.test
+++ b/test/trigger4.test
@@ -130,8 +130,8 @@ do_test trigger4-3.7 {
 
 do_test trigger4-4.1 {
     db close
-    file delete -force trigtest.db
-    file delete -force trigtest.db-journal
+    forcedelete trigtest.db
+    forcedelete trigtest.db-journal
     sqlite3 db trigtest.db
     catchsql {drop table tbl; drop view vw}
     execsql {
@@ -195,6 +195,6 @@ do_test trigger4-7.2 {
 
 integrity_check trigger4-99.9
 db close
-file delete -force trigtest.db trigtest.db-journal
+forcedelete trigtest.db trigtest.db-journal
 
 finish_test
diff --git a/test/triggerA.test b/test/triggerA.test
index 9f93db5c..0bc017ff 100644
--- a/test/triggerA.test
+++ b/test/triggerA.test
@@ -205,16 +205,16 @@ source $testdir/malloc_common.tcl
 # Save a copy of the current database configuration.
 #
 db close
-file delete -force test.db-triggerA
-file copy test.db test.db-triggerA
+forcedelete test.db-triggerA
+copy_file test.db test.db-triggerA
 sqlite3 db test.db
 
 # Run malloc tests on the INSTEAD OF trigger firing.
 #
 do_malloc_test triggerA-3 -tclprep {
   db close
-  file delete -force test.db test.db-journal
-  file copy -force test.db-triggerA test.db
+  forcedelete test.db test.db-journal
+  forcecopy test.db-triggerA test.db
   sqlite3 db test.db
   sqlite3_extended_result_codes db 1  
   db eval {SELECT * FROM v5; -- warm up the cache}
@@ -225,6 +225,6 @@ do_malloc_test triggerA-3 -tclprep {
 
 # Clean up the saved database copy.
 #
-file delete -force test.db-triggerA
+forcedelete test.db-triggerA
 
 finish_test
diff --git a/test/triggerC.test b/test/triggerC.test
index e5a492a4..12a5e4ac 100644
--- a/test/triggerC.test
+++ b/test/triggerC.test
@@ -918,7 +918,7 @@ do_test triggerC-11.4 {
 
 do_test triggerC-12.1 {
   db close
-  file delete -force test.db
+  forcedelete test.db
   sqlite3 db test.db
 
   execsql {
diff --git a/test/triggerD.test b/test/triggerD.test
index 08945081..a5dd4bdd 100644
--- a/test/triggerD.test
+++ b/test/triggerD.test
@@ -14,6 +14,12 @@
 # the use of these columns in triggers will refer to the column and not
 # to the actual ROWID.  Ticket [34d2ae1c6d08b5271ba5e5592936d4a1d913ffe3]
 #
+# Also, verify that triggers created like this:
+#
+#    CREATE TRIGGER attached.trig AFTER INSERT ON attached.tab ...
+#
+# can be reparsed as a main database.  Ticket [d6ddba6706353915ceedc56b4e3]
+#
 
 set testdir [file dirname $argv0]
 source $testdir/tester.tcl
@@ -171,4 +177,43 @@ do_test triggerD-3.2 {
 } {10003 20004}
 
 
+#############################################################################
+# 
+# Ticket [d6ddba6706353915ceedc56b4e3e72ecb4d77ba4]
+#
+# The following syntax really should not be allowed:
+#
+#    CREATE TRIGGER xyz.trig BEFORE UPDATE ON xyz.tab BEGIN ...
+#
+# But a long-standing bug does allow it.  And the "xyz.tab" slips into
+# the sqlite_master table.  We cannot fix the bug simply by disallowing
+# "xyz.tab" since that could break legacy applications.  We have to 
+# fix the system so that the "xyz." on "xyz.tab" is ignored.
+# Verify that this is the case.
+#
+do_test triggerD-4.1 {
+  db close
+  forcedelete test.db test2.db
+  sqlite3 db test.db
+  db eval {
+    CREATE TABLE t1(x);
+    ATTACH 'test2.db' AS db2;
+    CREATE TABLE db2.t2(y);
+    CREATE TABLE db2.log(z);
+    CREATE TRIGGER db2.trig AFTER INSERT ON db2.t2 BEGIN
+      INSERT INTO log(z) VALUES(new.y);
+    END;
+    INSERT INTO t2 VALUES(123);
+    SELECT * FROM log;
+  }
+} {123}
+do_test triggerD-4.2 {
+  sqlite3 db2 test2.db
+  db2 eval {
+    INSERT INTO t2 VALUES(234);
+    SELECT * FROM log;
+  }
+} {123 234}
+db2 close
+
 finish_test
diff --git a/test/unordered.test b/test/unordered.test
index a9c62534..6c7c2bb2 100644
--- a/test/unordered.test
+++ b/test/unordered.test
@@ -31,11 +31,13 @@ do_execsql_test 1.0 {
 } {}
 
 foreach idxmode {ordered unordered} {
+  catchsql { DELETE FROM sqlite_stat2 }
+  catchsql { DELETE FROM sqlite_stat3 }
   if {$idxmode == "unordered"} {
     execsql { UPDATE sqlite_stat1 SET stat = stat || ' unordered' }
-    db close
-    sqlite3 db test.db
   }
+  db close
+  sqlite3 db test.db
   foreach {tn sql r(ordered) r(unordered)} {
     1   "SELECT * FROM t1 ORDER BY a"
         {0 0 0 {SCAN TABLE t1 USING INDEX i1 (~128 rows)}}
diff --git a/test/uri.test b/test/uri.test
index f361e929..90074d0d 100644
--- a/test/uri.test
+++ b/test/uri.test
@@ -219,44 +219,46 @@ do_test 4.3.2 {
 # set, where X is the file-name the method is called on. Calls to the above
 # methods using "tvfs2" set entries in the global T2 array.
 #
-testvfs tvfs1 
-tvfs1 filter {xOpen xDelete xAccess xFullPathname}
-tvfs1 script tvfs1_callback
-proc tvfs1_callback {method filename args} { 
-  set ::T1([file tail $filename]) 1 
-}
-testvfs tvfs2 
-tvfs2 filter {xOpen xDelete xAccess xFullPathname}
-tvfs2 script tvfs2_callback
-proc tvfs2_callback {method filename args} { 
-  set ::T2([file tail $filename]) 1 
-}
-
-catch {db close}
-eval forcedelete [glob test.db*]
-do_test 5.1.1 {
-  sqlite3 db file:test.db1?vfs=tvfs1
-  execsql {
-    ATTACH 'file:test.db2?vfs=tvfs2' AS aux;
-    PRAGMA main.journal_mode = PERSIST;
-    PRAGMA aux.journal_mode = PERSIST;
-    CREATE TABLE t1(a, b);
-    CREATE TABLE aux.t2(a, b);
-    PRAGMA main.journal_mode = WAL;
-    PRAGMA aux.journal_mode = WAL;
-    INSERT INTO t1 VALUES('x', 'y');
-    INSERT INTO t2 VALUES('x', 'y');
+ifcapable wal {
+  testvfs tvfs1 
+  tvfs1 filter {xOpen xDelete xAccess xFullPathname}
+  tvfs1 script tvfs1_callback
+  proc tvfs1_callback {method filename args} { 
+    set ::T1([file tail $filename]) 1 
   }
-  lsort [array names ::T1]
-} {test.db1 test.db1-journal test.db1-wal}
-
-do_test 5.1.2 {
-  lsort [array names ::T2]
-} {test.db2 test.db2-journal test.db2-wal}
-
-db close
-tvfs1 delete
-tvfs2 delete
+  testvfs tvfs2 
+  tvfs2 filter {xOpen xDelete xAccess xFullPathname}
+  tvfs2 script tvfs2_callback
+  proc tvfs2_callback {method filename args} { 
+    set ::T2([file tail $filename]) 1 
+  }
+  
+  catch {db close}
+  eval forcedelete [glob test.db*]
+  do_test 5.1.1 {
+    sqlite3 db file:test.db1?vfs=tvfs1
+    execsql {
+      ATTACH 'file:test.db2?vfs=tvfs2' AS aux;
+      PRAGMA main.journal_mode = PERSIST;
+      PRAGMA aux.journal_mode = PERSIST;
+      CREATE TABLE t1(a, b);
+      CREATE TABLE aux.t2(a, b);
+      PRAGMA main.journal_mode = WAL;
+      PRAGMA aux.journal_mode = WAL;
+      INSERT INTO t1 VALUES('x', 'y');
+      INSERT INTO t2 VALUES('x', 'y');
+    }
+    lsort [array names ::T1]
+  } {test.db1 test.db1-journal test.db1-wal}
+  
+  do_test 5.1.2 {
+    lsort [array names ::T2]
+  } {test.db2 test.db2-journal test.db2-wal}
+  db close
+  
+  tvfs1 delete
+  tvfs2 delete
+}
 
 #-------------------------------------------------------------------------
 # Check that only "" and "localhost" are acceptable as authorities.
diff --git a/test/vacuum.test b/test/vacuum.test
index 34be57ce..57429c29 100644
--- a/test/vacuum.test
+++ b/test/vacuum.test
@@ -208,7 +208,7 @@ db3 close
 do_test vacuum-3.1 {
   db close
   db2 close
-  file delete test.db
+  delete_file test.db
   sqlite3 db test.db
   execsql {
     PRAGMA empty_result_callbacks=on;
@@ -234,7 +234,7 @@ do_test vacuum-4.2 {
 ifcapable view {
 do_test vacuum-5.1 {
   db close
-  file delete -force test.db
+  forcedelete test.db
   sqlite3 db test.db
   catchsql {
     CREATE TABLE Test (TestID int primary key);
@@ -290,10 +290,10 @@ ifcapable {bloblit} {
 }
 
 # Check what happens when an in-memory database is vacuumed. The
-# [file delete] command covers us in case the library was compiled
+# [delete_file] command covers us in case the library was compiled
 # without in-memory database support.
 #
-file delete -force :memory:
+forcedelete :memory:
 do_test vacuum-7.0 {
   sqlite3 db2 :memory:
   execsql {
@@ -337,8 +337,8 @@ db2 close
 # Ticket #873.  VACUUM a database that has ' in its name.
 #
 do_test vacuum-8.1 {
-  file delete -force a'z.db
-  file delete -force a'z.db-journal
+  forcedelete a'z.db
+  forcedelete a'z.db-journal
   sqlite3 db2 a'z.db
   execsql {
     CREATE TABLE t1(t);
@@ -383,6 +383,22 @@ ifcapable {autoinc} {
   } $::cksum
 }
 
-file delete -force {a'z.db}
+forcedelete {a'z.db}
+
+# Test that "PRAGMA count_changes" does not interfere with VACUUM or cause
+# it to return any rows to the user.
+#
+do_test vacuum-10.1 {
+  db close
+  forcedelete test.db
+  sqlite3 db test.db
+  execsql {
+    CREATE TABLE t8(a, b);
+    INSERT INTO t8 VALUES('a', 'b');
+    INSERT INTO t8 VALUES('c', 'd');
+    PRAGMA count_changes = 1;
+  }
+} {}
+do_test vacuum-10.2 { execsql VACUUM } {}
 
 finish_test
diff --git a/test/vacuum2.test b/test/vacuum2.test
index 35524bb2..b3bfab30 100644
--- a/test/vacuum2.test
+++ b/test/vacuum2.test
@@ -135,7 +135,7 @@ db2 close
 ifcapable autovacuum {
   do_test vacuum2-4.1 {
     db close
-    file delete -force test.db
+    forcedelete test.db
     sqlite3 db test.db
     execsql {
       pragma auto_vacuum=1;
diff --git a/test/vacuum3.test b/test/vacuum3.test
index f6b75d70..484a7d44 100644
--- a/test/vacuum3.test
+++ b/test/vacuum3.test
@@ -196,7 +196,7 @@ foreach {request actual} [list \
 
 do_test vacuum3-4.1 {
   db close
-  file delete test.db
+  delete_file test.db
   sqlite3 db test.db
   execsql {
     PRAGMA page_size=1024;
diff --git a/test/view.test b/test/view.test
index a87d2770..b4440905 100644
--- a/test/view.test
+++ b/test/view.test
@@ -458,7 +458,7 @@ do_test view-12.1 {
 
 ifcapable attach {
   do_test view-13.1 {
-    file delete -force test2.db
+    forcedelete test2.db
     catchsql {
       ATTACH 'test2.db' AS two;
       CREATE TABLE two.t2(x,y);
diff --git a/test/vtab1.test b/test/vtab1.test
index a9aca503..16f1b438 100644
--- a/test/vtab1.test
+++ b/test/vtab1.test
@@ -724,8 +724,8 @@ do_test vtab1-6-8.4 {
 } {}
 execsql {PRAGMA count_changes=OFF}
 
-file delete -force test2.db
-file delete -force test2.db-journal
+forcedelete test2.db
+forcedelete test2.db-journal
 sqlite3 db2 test2.db
 execsql {
   CREATE TABLE techo(a PRIMARY KEY, b, c);
@@ -1178,5 +1178,20 @@ do_test vtab1-17.1 {
   catchsql { CREATE VIRTUAL TABLE t4 USING echo(t3); }
 } {1 {vtable constructor failed: t4}}
 
+# This test verifies that ticket 48f29963 is fixed.
+#
+do_test vtab1-17.1 {
+  execsql { 
+    CREATE TABLE t5(a, b);
+    CREATE VIRTUAL TABLE e5 USING echo_v2(t5);
+    BEGIN;
+      INSERT INTO e5 VALUES(1, 2);
+      DROP TABLE e5;
+      SAVEPOINT one;
+      ROLLBACK TO one;
+    COMMIT;
+  }
+} {}
+
 unset -nocomplain echo_module_begin_fail
 finish_test
diff --git a/test/vtab7.test b/test/vtab7.test
index d1b1f590..162bab5e 100644
--- a/test/vtab7.test
+++ b/test/vtab7.test
@@ -134,8 +134,8 @@ execsql {DROP TABLE newtab}
 # Write to an attached database from xSync().
 ifcapable attach {
   do_test vtab7-3.1 {
-    file delete -force test2.db
-    file delete -force test2.db-journal
+    forcedelete test2.db
+    forcedelete test2.db-journal
     execsql {
       ATTACH 'test2.db' AS db2;
       CREATE TABLE db2.stuff(description, shape, color);
diff --git a/test/vtabC.test b/test/vtabC.test
index 824d4ca2..ca78b706 100644
--- a/test/vtabC.test
+++ b/test/vtabC.test
@@ -31,7 +31,7 @@ ifcapable !trigger { finish_test ; return }
 unset -nocomplain N
 for {set N 1} {$N<=20} {incr N} {
   db close
-  file delete -force test.db test.db-journal
+  forcedelete test.db test.db-journal
   sqlite3 db test.db
   register_echo_module [sqlite3_connection_pointer db]
 
diff --git a/test/vtabF.test b/test/vtabF.test
new file mode 100644
index 00000000..b9341ea5
--- /dev/null
+++ b/test/vtabF.test
@@ -0,0 +1,45 @@
+# 2011 Aug 1
+#
+# The author disclaims copyright to this source code.  In place of
+# a legal notice, here is a blessing:
+#
+#    May you do good and not evil.
+#    May you find forgiveness for yourself and forgive others.
+#    May you share freely, never taking more than you give.
+#
+#***********************************************************************
+# This file implements regression tests for SQLite library. 
+# This file checks to make sure IS NOT NULL constraints work on
+# virtual tables.
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+ifcapable !vtab||!schema_pragmas { finish_test ; return }
+
+# Register the echo module
+register_echo_module [sqlite3_connection_pointer db]
+
+do_test vtabE-1.1 {
+  execsql {
+    CREATE TABLE t1(a, b);
+    CREATE INDEX i1 ON t1(a);
+    CREATE INDEX i2 ON t1(b);
+    INSERT INTO t1 VALUES(10,110);
+    INSERT INTO t1 VALUES(11,111);
+    INSERT INTO t1 SELECT a+2, b+2 FROM t1;
+    INSERT INTO t1 SELECT null, b+4 FROM t1;
+    INSERT INTO t1 SELECT null, b+8 FROM t1;
+    INSERT INTO t1 SELECT null, b+16 FROM t1;
+    ANALYZE;
+    CREATE VIRTUAL TABLE tv1 USING echo(t1);
+    SELECT b FROM t1 WHERE a IS NOT NULL;
+  }
+} {110 111 112 113}
+do_test vtabE-1.2 {
+  execsql {SELECT b FROM tv1 WHERE a IS NOT NULL}
+} {110 111 112 113}
+
+
+finish_test
diff --git a/test/wal.test b/test/wal.test
index 1aa70e05..056becf7 100644
--- a/test/wal.test
+++ b/test/wal.test
@@ -25,7 +25,7 @@ ifcapable !wal {finish_test ; return }
 
 proc reopen_db {} {
   catch { db close }
-  file delete -force test.db test.db-wal test.db-wal-summary
+  forcedelete test.db test.db-wal test.db-wal-summary
   sqlite3_wal db test.db
 }
 
@@ -211,8 +211,8 @@ do_test wal-4.4.5 {
   execsql { SELECT count(*) FROM t2 }
 } {1}
 do_test wal-4.4.6 {
-  file copy -force test.db test2.db
-  file copy -force test.db-wal test2.db-wal
+  forcecopy test.db test2.db
+  forcecopy test.db-wal test2.db-wal
   sqlite3 db2 test2.db
   execsql { SELECT count(*) FROM t2 ; SELECT count(*) FROM t1 } db2
 } {1 2}
@@ -269,8 +269,8 @@ do_test wal-4.5.5 {
   execsql { SELECT count(*) FROM t2 ; SELECT count(*) FROM t1 }
 } {1 2}
 do_test wal-4.5.6 {
-  file copy -force test.db test2.db
-  file copy -force test.db-wal test2.db-wal
+  forcecopy test.db test2.db
+  forcecopy test.db-wal test2.db-wal
   sqlite3 db2 test2.db
   execsql { SELECT count(*) FROM t2 ; SELECT count(*) FROM t1 } db2
 } {1 2}
@@ -334,7 +334,7 @@ db close
 foreach sector {512 4096} {
   sqlite3_simulate_device -sectorsize $sector
   foreach pgsz {512 1024 2048 4096} {
-    file delete -force test.db test.db-wal
+    forcedelete test.db test.db-wal
     do_test wal-6.$sector.$pgsz.1 {
       sqlite3 db test.db -vfs devsym
       execsql "
@@ -357,7 +357,7 @@ foreach sector {512 4096} {
 }
 
 do_test wal-7.1 {
-  file delete -force test.db test.db-wal
+  forcedelete test.db test.db-wal
   sqlite3_wal db test.db
   execsql {
     PRAGMA page_size = 1024;
@@ -377,7 +377,7 @@ do_test wal-7.2 {
 do_test wal-8.1 {
   reopen_db
   catch { db close }
-  file delete -force test.db test.db-wal
+  forcedelete test.db test.db-wal
 
   sqlite3 db test.db
   db function blob blob
@@ -435,9 +435,9 @@ do_test wal-9.2 {
 } {ok}
 
 do_test wal-9.3 {
-  file delete -force test2.db test2.db-wal
-  file copy test.db test2.db
-  file copy test.db-wal test2.db-wal
+  forcedelete test2.db test2.db-wal
+  copy_file test.db test2.db
+  copy_file test.db-wal test2.db-wal
   sqlite3_wal db3 test2.db 
   execsql {PRAGMA integrity_check } db3
 } {ok}
@@ -786,8 +786,8 @@ do_test wal-12.3 {
   list [expr [file size test.db]/1024] [expr [file size test.db-wal]/1044]
 } {3 2}
 do_test wal-12.4 {
-  file copy -force test.db test2.db
-  file copy -force test.db-wal test2.db-wal
+  forcecopy test.db test2.db
+  forcecopy test.db-wal test2.db-wal
   sqlite3_wal db2 test2.db
   execsql { SELECT * FROM t2 } db2
 } {B 1}
@@ -804,8 +804,8 @@ do_test wal-12.5 {
   execsql {  SELECT * FROM t2 }
 } {B 2}
 do_test wal-12.6 {
-  file copy -force test.db test2.db
-  file copy -force test.db-wal test2.db-wal
+  forcecopy test.db test2.db
+  forcecopy test.db-wal test2.db-wal
   sqlite3_wal db2 test2.db
   execsql { SELECT * FROM t2 } db2
 } {B 2}
@@ -909,7 +909,7 @@ do_multiclient_test tn {
 catch { db close }
 catch { db2 close }
 catch { db3 close }
-file delete -force test.db test.db-wal
+forcedelete test.db test.db-wal
 sqlite3 db test.db
 sqlite3 db2 test.db
 do_test wal-14 {
@@ -947,7 +947,7 @@ catch { db2 close }
 # The following block of tests - wal-15.* - focus on testing the 
 # implementation of the sqlite3_wal_checkpoint() interface.
 #
-file delete -force test.db test.db-wal
+forcedelete test.db test.db-wal
 sqlite3 db test.db
 do_test wal-15.1 {
   execsql {
@@ -1043,8 +1043,8 @@ foreach {tn ckpt_cmd ckpt_res ckpt_main ckpt_aux} {
   9 {db eval "PRAGMA temp.wal_checkpoint"}   {0 -1 -1}     0 0
 } {
   do_test wal-16.$tn.1 {
-    file delete -force test2.db test2.db-wal test2.db-journal
-    file delete -force test.db test.db-wal test.db-journal
+    forcedelete test2.db test2.db-wal test2.db-journal
+    forcedelete test.db test.db-wal test.db-journal
 
     sqlite3 db test.db
     execsql {
@@ -1116,7 +1116,7 @@ foreach {tn sectorsize logsize} "
   6  4096  [wal_file_size 176 512]
   7  8192  [wal_file_size 184 512]
 " {
-  file delete -force test.db test.db-wal test.db-journal
+  forcedelete test.db test.db-wal test.db-journal
   sqlite3_simulate_device -sectorsize $sectorsize
   sqlite3 db test.db -vfs devsym
 
@@ -1160,7 +1160,7 @@ sqlite3_test_control_pending_byte $old_pending_byte
 #   wal-18.2.* When the page-size field that occurs at the start of a log
 #              file is a power of 2 greater than 16384 or smaller than 512.
 #
-file delete -force test.db test.db-wal test.db-journal
+forcedelete test.db test.db-wal test.db-journal
 do_test wal-18.0 {
   sqlite3 db test.db
   execsql {
@@ -1178,8 +1178,8 @@ do_test wal-18.0 {
     INSERT INTO t1 VALUES(5, 6);          -- frames 5 and 6
   }
 
-  file copy -force test.db testX.db
-  file copy -force test.db-wal testX.db-wal
+  forcecopy test.db testX.db
+  forcecopy test.db-wal testX.db-wal
   db close
   list [file size testX.db] [file size testX.db-wal]
 } [list [expr 3*1024] [wal_file_size 6 1024]]
@@ -1195,8 +1195,8 @@ foreach {nFrame result} {
          6      {0 0 1 2 3 4 5 6}
 } {
   do_test wal-18.1.$nFrame {
-    file copy -force testX.db test.db
-    file copy -force testX.db-wal test.db-wal
+    forcecopy testX.db test.db
+    forcecopy testX.db-wal test.db-wal
 
     hexio_write test.db-wal [expr 24 + $nFrame*(24+1024) + 20] 00000000
 
@@ -1232,7 +1232,7 @@ proc logcksum {ckv1 ckv2 blob} {
   }
 }
 
-file copy -force test.db testX.db
+forcecopy test.db testX.db
 foreach {tn pgsz works} { 
   1    128    0
   2    256    0
@@ -1253,8 +1253,8 @@ foreach {tn pgsz works} {
   }
 
   for {set pg 1} {$pg <= 3} {incr pg} {
-    file copy -force testX.db test.db
-    file delete -force test.db-wal
+    forcecopy testX.db test.db
+    forcedelete test.db-wal
   
     # Check that the database now exists and consists of three pages. And
     # that there is no associated wal file.
@@ -1321,7 +1321,7 @@ foreach {tn pgsz works} {
 # snapshot.
 #
 do_test wal-19.1 {
-  file delete -force test.db test.db-wal test.db-journal
+  forcedelete test.db test.db-wal test.db-journal
   sqlite3 db test.db
   sqlite3 db2 test.db
   execsql {
@@ -1370,7 +1370,7 @@ do_test wal-19.4 {
 #
 do_test wal-20.1 {
   catch {db close}
-  file delete -force test.db test.db-wal test.db-journal
+  forcedelete test.db test.db-wal test.db-journal
   sqlite3 db test.db
   execsql {
     PRAGMA journal_mode = WAL;
@@ -1476,7 +1476,7 @@ foreach pgsz {512 1024 2048 4096 8192 16384 32768 65536} {
 #
 set walfile [file nativename [file join [pwd] test.db-wal]]
 catch {db close}
-file delete -force test.db
+forcedelete test.db
 do_test wal-23.1 {
   faultsim_delete_and_reopen
   execsql {
diff --git a/test/wal2.test b/test/wal2.test
index 97966cd9..f4887065 100644
--- a/test/wal2.test
+++ b/test/wal2.test
@@ -164,7 +164,7 @@ foreach {tn iInsert res wal_index_hdr_mod wal_locks} "
 db close
 db2 close
 tvfs delete
-file delete -force test.db test.db-wal test.db-journal
+forcedelete test.db test.db-wal test.db-journal
 
 #-------------------------------------------------------------------------
 # This test case is very similar to the previous one, except, after
@@ -271,7 +271,7 @@ foreach {tn iInsert res0 res1 wal_index_hdr_mod} {
 db close
 db2 close
 tvfs delete
-file delete -force test.db test.db-wal test.db-journal
+forcedelete test.db test.db-wal test.db-journal
 
 
 if 0 {
@@ -344,7 +344,7 @@ do_test wal2-3.5 {
 } {0 0}
 db close
 tvfs delete
-file delete -force test.db test.db-wal test.db-journal
+forcedelete test.db test.db-wal test.db-journal
 
 }
 
@@ -441,7 +441,7 @@ tvfs delete
 #               connection silently remains in exclusive mode.
 #
 do_test wal2-6.1.1 {
-  file delete -force test.db test.db-wal test.db-journal
+  forcedelete test.db test.db-wal test.db-journal
   sqlite3 db test.db
   execsql {
     Pragma Journal_Mode = Wal;
@@ -484,7 +484,7 @@ do_test wal2-6.1.6 {
 db close
 
 do_test wal2-6.2.1 {
-  file delete -force test.db test.db-wal test.db-journal
+  forcedelete test.db test.db-wal test.db-journal
   sqlite3 db test.db
   execsql {
     Pragma Locking_Mode = Exclusive;
@@ -552,7 +552,7 @@ do_test wal2-6.2.9 {
 db close
 
 do_test wal2-6.3.1 {
-  file delete -force test.db test.db-wal test.db-journal
+  forcedelete test.db test.db-wal test.db-journal
   sqlite3 db test.db
   execsql {
     PRAGMA journal_mode = WAL;
@@ -597,7 +597,7 @@ db close
 # as expected when a WAL database is used with locking_mode=exclusive.
 #
 do_test wal2-6.4.1 {
-  file delete -force test.db test.db-wal test.db-journal
+  forcedelete test.db test.db-wal test.db-journal
   proc tvfs_cb {method args} {
     set ::shm_file [lindex $args 0]
     if {$method == "xShmLock"} { lappend ::locks [lindex $args 2] }
@@ -606,6 +606,7 @@ do_test wal2-6.4.1 {
   testvfs tvfs
   tvfs script tvfs_cb
   sqlite3 db test.db -vfs tvfs
+  set {} {}
 } {}
 
 set RECOVERY {
@@ -792,7 +793,7 @@ T delete
 # Test a theory about the checksum algorithm. Theory was false and this
 # test did not provoke a bug.
 #
-file delete -force test.db test.db-wal test.db-journal
+forcedelete test.db test.db-wal test.db-journal
 do_test wal2-7.1.1 {
   sqlite3 db test.db
   execsql {
@@ -803,8 +804,8 @@ do_test wal2-7.1.1 {
   file size test.db
 } {4096}
 do_test wal2-7.1.2 {
-  file copy -force test.db test2.db
-  file copy -force test.db-wal test2.db-wal
+  forcecopy test.db test2.db
+  forcecopy test.db-wal test2.db-wal
   hexio_write test2.db-wal 48 FF
 } {1}
 do_test wal2-7.1.3 {
@@ -814,7 +815,7 @@ do_test wal2-7.1.3 {
 } {}
 db close
 db2 close
-file delete -force test.db test.db-wal test.db-journal
+forcedelete test.db test.db-wal test.db-journal
 do_test wal2-8.1.2 {
   sqlite3 db test.db
   execsql {
@@ -870,7 +871,7 @@ testvfs tvfs
 tvfs script get_name
 tvfs filter xShmOpen
 
-file delete -force test.db test.db-wal test.db-journal
+forcedelete test.db test.db-wal test.db-journal
 do_test wal2-9.1 {
   sqlite3 db test.db -vfs tvfs
   execsql {
diff --git a/test/wal3.test b/test/wal3.test
index bd296154..ea5e7057 100644
--- a/test/wal3.test
+++ b/test/wal3.test
@@ -94,9 +94,9 @@ for {set i 1} {$i < 50} {incr i} {
   
   # Check that the file-system in its current state can be recovered.
   # 
-  file copy -force test.db test2.db
-  file copy -force test.db-wal test2.db-wal
-  file delete -force test2.db-journal
+  forcecopy test.db test2.db
+  forcecopy test.db-wal test2.db-wal
+  forcedelete test2.db-journal
   sqlite3 db2 test2.db
   do_test wal3-1.$i.5 {
     execsql { SELECT count(*) FROM t1 } db2
@@ -208,7 +208,7 @@ foreach {tn syncmode synccount} {
     lappend ::syncs [file tail $filename] $flags
   }
   do_test wal3-3.$tn {
-    file delete -force test.db test.db-wal test.db-journal
+    forcedelete test.db test.db-wal test.db-journal
   
     testvfs T
     T filter {} 
@@ -411,7 +411,7 @@ T delete
 catch {db close}
 testvfs T -default 1
 do_test wal3-6.1.1 {
-  file delete -force test.db test.db-journal test.db wal
+  forcedelete test.db test.db-journal test.db wal
   sqlite3 db test.db
   execsql { PRAGMA auto_vacuum = off }
   execsql { PRAGMA journal_mode = WAL }
@@ -492,7 +492,7 @@ db2 close
 db close
 
 do_test wal3-6.2.1 {
-  file delete -force test.db test.db-journal test.db wal
+  forcedelete test.db test.db-journal test.db wal
   sqlite3 db test.db
   sqlite3 db2 test.db
   execsql { PRAGMA auto_vacuum = off }
@@ -558,7 +558,7 @@ T delete
 catch {db close}
 testvfs T -default 1
 do_test wal3-7.1.1 {
-  file delete -force test.db test.db-journal test.db wal
+  forcedelete test.db test.db-journal test.db wal
   sqlite3 db test.db
   execsql {
     PRAGMA journal_mode = WAL;
@@ -615,7 +615,7 @@ T delete
 #-------------------------------------------------------------------------
 # 
 do_test wal3-8.1 {
-  file delete -force test.db test.db-journal test.db wal
+  forcedelete test.db test.db-journal test.db wal
   sqlite3 db test.db
   sqlite3 db2 test.db
   execsql {
@@ -707,9 +707,9 @@ T delete
 # and continues.
 #
 set nConn 50
-if { [string match *BSD $tcl_platform(os)] } { set nConn 35 }
+if { [string match *BSD $tcl_platform(os)] } { set nConn 25 }
 do_test wal3-9.0 {
-  file delete -force test.db test.db-journal test.db wal
+  forcedelete test.db test.db-journal test.db wal
   sqlite3 db test.db
   execsql {
     PRAGMA page_size = 1024;
@@ -784,4 +784,3 @@ do_multiclient_test tn {
 }
 
 finish_test
-
diff --git a/test/wal4.test b/test/wal4.test
index 22ccfea7..c7a43813 100644
--- a/test/wal4.test
+++ b/test/wal4.test
@@ -31,7 +31,7 @@ do_test wal4-1.2 {
   # Save a copy of the file-system containing the wal and wal-index files 
   # only (no database file).
   faultsim_save_and_close
-  file delete -force sv_test.db
+  forcedelete sv_test.db
 } {}
 
 do_test wal4-1.3 {
diff --git a/test/wal5.test b/test/wal5.test
index 0c700dfc..ad6bcfc7 100644
--- a/test/wal5.test
+++ b/test/wal5.test
@@ -235,14 +235,7 @@ foreach {testprefix do_wal_checkpoint} {
     do_test 2.3.$tn.5 { sql1 { INSERT INTO t2 VALUES(3, 4) } } {}
     do_test 2.3.$tn.6 { file_page_counts } {1 7 1 7}
     do_test 2.3.$tn.7 { code1 { do_wal_checkpoint db -mode full } } {1 7 5}
-    if {$tcl_platform(platform) == "windows"} {
-        # on unix, the size_hint is a no-op if no chunk size is set.
-        # the windows implementation does not have a similar check,
-        # and because of this, the db file size has an extra page.
-        do_test 2.3.$tn.8 { file_page_counts } {2 7 2 7}
-    } {
-        do_test 2.3.$tn.8 { file_page_counts } {1 7 2 7}
-    }
+    do_test 2.3.$tn.8 { file_page_counts } {1 7 2 7}
   }
 
   # Check that checkpoints block on the correct locks. And respond correctly
diff --git a/test/wal6.test b/test/wal6.test
index 6fae48e9..ec31bb8b 100644
--- a/test/wal6.test
+++ b/test/wal6.test
@@ -43,19 +43,11 @@ foreach jmode $all_journal_modes {
 	} {1 2}
 
 # Under Windows, you'll get an error trying to delete
-# a file this is already opened.  For now, make sure 
-# we get that error, then close the first connection
+# a file this is already opened.  Close the first connection
 # so the other tests work.
 if {$tcl_platform(platform)=="windows"} {
   if {$jmode=="persist" || $jmode=="truncate"} {
-	  do_test wal6-1.2.$jmode.win {
-	    sqlite3 db2 test.db
-	    catchsql {
-		    PRAGMA journal_mode=WAL;
-	    } db2
-	  } {1 {disk I/O error}}
-  	db2 close
-	  db close
+    db close
   }
 }
 
@@ -87,4 +79,3 @@ if {$tcl_platform(platform)=="windows"} {
 }
 
 finish_test
-
diff --git a/test/walbak.test b/test/walbak.test
index fe5b99e1..303a628a 100644
--- a/test/walbak.test
+++ b/test/walbak.test
@@ -48,7 +48,7 @@ do_test walbak-1.0 {
   }
 } {wal}
 do_test walbak-1.1 {
-  file delete -force bak.db bak.db-journal bak.db-wal
+  forcedelete bak.db bak.db-journal bak.db-wal
   db backup bak.db
   file size bak.db
 } [expr 3*1024]
@@ -79,6 +79,9 @@ do_test walbak-1.6 {
   execsql { PRAGMA wal_checkpoint }
   list [file size test.db] [file size test.db-wal]
 } [list [expr 3*1024] [wal_file_size 6 1024]]
+do_test walbak-1.6.1 {
+  hexio_read test.db 18 2
+} {0202}
 do_test walbak-1.7 {
   execsql { 
     CREATE TABLE t2(a, b);
@@ -106,7 +109,7 @@ proc sig {{db db}} {
   }
 }
 db close
-file delete test.db
+delete_file test.db
 sqlite3 db test.db
 do_test walbak-2.1 {
   execsql { PRAGMA journal_mode = WAL }
@@ -236,7 +239,7 @@ foreach {tn setup} {
   }
 
 } {
-  foreach f [glob -nocomplain test.db*] { file delete -force $f }
+  foreach f [glob -nocomplain test.db*] { forcedelete $f }
 
   eval $setup
 
@@ -271,9 +274,84 @@ foreach {tn setup} {
     execsql { SELECT * FROM t1 }
   } {1 2 3 4 5 6 7 8}
 
+  # Check that [db] is still in WAL mode.
+  do_test walbak-3.$tn.5 {
+    execsql { PRAGMA journal_mode }
+  } {wal}
+  do_test walbak-3.$tn.6 {
+    execsql { PRAGMA wal_checkpoint }
+    hexio_read test.db 18 2
+  } {0202}
+
+  # If it was not an in-memory database, check that [db2] is still in
+  # rollback mode.
+  if {[file exists test.db2]} {
+    do_test walbak-3.$tn.7 {
+      execsql { PRAGMA journal_mode } db2
+    } {wal}
+    do_test walbak-3.$tn.8 {
+      execsql { PRAGMA wal_checkpoint }
+      hexio_read test.db 18 2
+    } {0202}
+  }
+
   db  close
   db2 close
 }
 
+#-------------------------------------------------------------------------
+# Test that the following holds when a backup operation is run:
+#
+#   Source  |  Destination inital  |  Destination final
+#   ---------------------------------------------------
+#   Rollback   Rollback               Rollback
+#   Rollback   WAL                    WAL
+#   WAL        Rollback               WAL
+#   WAL        WAL                    WAL
+#
+foreach {tn src dest dest_final} {
+  1   delete    delete    delete
+  2   delete    wal       wal
+  3   wal       delete    wal
+  4   wal       wal       wal
+} {
+  catch { db close } 
+  catch { db2 close } 
+  forcedelete test.db test.db2
+
+  do_test walbak-4.$tn.1 {
+    sqlite3 db test.db
+    db eval "PRAGMA journal_mode = $src"
+    db eval {
+      CREATE TABLE t1(a, b);
+      INSERT INTO t1 VALUES('I', 'II');
+      INSERT INTO t1 VALUES('III', 'IV');
+    }
+
+    sqlite3 db2 test.db2
+    db2 eval "PRAGMA journal_mode = $dest"
+    db2 eval {
+      CREATE TABLE t2(x, y);
+      INSERT INTO t2 VALUES('1', '2');
+      INSERT INTO t2 VALUES('3', '4');
+    }
+  } {}
+
+  do_test walbak-4.$tn.2 { execsql { PRAGMA journal_mode } db  } $src
+  do_test walbak-4.$tn.3 { execsql { PRAGMA journal_mode } db2 } $dest
+
+  do_test walbak-4.$tn.4 { db backup test.db2 } {}
+  do_test walbak-4.$tn.5 {
+    execsql { SELECT * FROM t1 } db2
+  } {I II III IV}
+  do_test walbak-4.$tn.5 { execsql { PRAGMA journal_mode } db2 } $dest_final
+
+
+  db2 close
+  do_test walbak-4.$tn.6 { file exists test.db2-wal } 0
+  sqlite3 db2 test.db2
+  do_test walbak-4.$tn.7 { execsql { PRAGMA journal_mode } db2 } $dest_final
+}
+
 
 finish_test
diff --git a/test/walbig.test b/test/walbig.test
index 9ceb8ede..092db238 100644
--- a/test/walbig.test
+++ b/test/walbig.test
@@ -17,6 +17,11 @@
 set testdir [file dirname $argv0]
 source $testdir/tester.tcl
 
+ifcapable !wal {
+  finish_test
+  return
+}
+
 # Do not use a codec for this file, as the database is manipulated using
 # external methods (the [fake_big_file] and [hexio_write] commands).
 #
diff --git a/test/walcksum.test b/test/walcksum.test
index b2c4a905..08278dd0 100644
--- a/test/walcksum.test
+++ b/test/walcksum.test
@@ -153,7 +153,7 @@ foreach endian {big little} {
   #
   do_test walcksum-1.$endian.1 {
     catch { db close }
-    file delete -force test.db test.db-wal test.db-journal
+    forcedelete test.db test.db-wal test.db-journal
     sqlite3 db test.db
     execsql {
       PRAGMA page_size = 1024;
@@ -172,8 +172,8 @@ foreach endian {big little} {
       INSERT INTO t1 VALUES(21, 'twentyone');
     }
 
-    file copy -force test.db test2.db
-    file copy -force test.db-wal test2.db-wal
+    forcecopy test.db test2.db
+    forcecopy test.db-wal test2.db-wal
     db close
 
     list [file size test2.db] [file size test2.db-wal]
@@ -199,8 +199,8 @@ foreach endian {big little} {
     } {1}
   }
   do_test walcksum-1.$endian.4.1 {
-    file copy -force test2.db test.db
-    file copy -force test2.db-wal test.db-wal
+    forcecopy test2.db test.db
+    forcecopy test2.db-wal test.db-wal
     sqlite3 db test.db
     execsql { SELECT a FROM t1 }
   } {1 2 3 5 8 13 21}
@@ -248,8 +248,8 @@ foreach endian {big little} {
   # Now that both the recoverer and non-recoverer have added frames to the
   # log file, check that it can still be recovered.
   #
-  file copy -force test.db test2.db
-  file copy -force test.db-wal test2.db-wal
+  forcecopy test.db test2.db
+  forcecopy test.db-wal test2.db-wal
   do_test walcksum-1.$endian.7.11 {
     sqlite3 db3 test2.db
     execsql { 
@@ -294,7 +294,7 @@ foreach endian {big little} {
 # formatted (and can be recovered by a second process if required).
 #
 do_test walcksum-2.1 {
-  file delete -force test.db test.db-wal test.db-journal
+  forcedelete test.db test.db-wal test.db-journal
   sqlite3 db test.db
   execsql {
     PRAGMA synchronous = NORMAL;
@@ -322,8 +322,8 @@ do_test walcksum-2.1 {
     COMMIT;
   }
 
-  file copy -force test.db test2.db
-  file copy -force test.db-wal test2.db-wal
+  forcecopy test.db test2.db
+  forcecopy test.db-wal test2.db-wal
 
   sqlite3 db2 test2.db
   execsql {
@@ -340,7 +340,7 @@ catch { db2 close }
 # invalid as a result.
 #
 do_test walcksum-3.1 {
-  file delete -force test.db test.db-wal test.db-journal
+  forcedelete test.db test.db-wal test.db-journal
   sqlite3 db test.db
 
   execsql {
@@ -356,13 +356,13 @@ do_test walcksum-3.1 {
   file size test.db-wal
 } [wal_file_size 1 1024]
 do_test walcksum-3.2 {
-  file copy -force test.db-wal test2.db-wal
-  file copy -force test.db test2.db
+  forcecopy test.db-wal test2.db-wal
+  forcecopy test.db test2.db
   sqlite3 db2 test2.db
   execsql { SELECT a FROM t1 } db2
 } {1 2 3}
 db2 close
-file copy -force test.db test2.db
+forcecopy test.db test2.db
 
 
 foreach incr {1 2 3 20 40 60 80 100 120 140 160 180 200 220 240 253 254 255} {
@@ -370,7 +370,7 @@ foreach incr {1 2 3 20 40 60 80 100 120 140 160 180 200 220 240 253 254 255} {
     set FAIL 0
     for {set iOff 0} {$iOff < [wal_file_size 1 1024]} {incr iOff} {
 
-      file copy -force test.db-wal test2.db-wal
+      forcecopy test.db-wal test2.db-wal
       set fd [open test2.db-wal r+]
       fconfigure $fd -encoding binary
       fconfigure $fd -translation binary
diff --git a/test/walcrash.test b/test/walcrash.test
index 0ef21fff..cfce5fed 100644
--- a/test/walcrash.test
+++ b/test/walcrash.test
@@ -37,7 +37,7 @@ set REPEATS 100
 # walcrash-1.*
 #
 for {set i 1} {$i < $REPEATS} {incr i} {
-  file delete -force test.db test.db-wal
+  forcedelete test.db test.db-wal
   do_test walcrash-1.$i.1 {
     crashsql -delay 4 -file test.db-wal -seed [incr seed] {
       PRAGMA journal_mode = WAL;
@@ -74,7 +74,7 @@ for {set i 1} {$i < $REPEATS} {incr i} {
 # walcrash-2.*
 #
 for {set i 1} {$i < $REPEATS} {incr i} {
-  file delete -force test.db test.db-wal
+  forcedelete test.db test.db-wal
   do_test walcrash-2.$i.1 {
     crashsql -delay 4 -file test.db-wal -seed [incr seed] {
       PRAGMA journal_mode = WAL;
@@ -111,8 +111,8 @@ for {set i 1} {$i < $REPEATS} {incr i} {
 # walcrash-3.*
 #
 # for {set i 1} {$i < $REPEATS} {incr i} {
-#   file delete -force test.db test.db-wal
-#   file delete -force test2.db test2.db-wal
+#   forcedelete test.db test.db-wal
+#   forcedelete test2.db test2.db-wal
 # 
 #   do_test walcrash-3.$i.1 {
 #     crashsql -delay 2 -file test2.db-wal -seed [incr seed] {
@@ -143,8 +143,8 @@ for {set i 1} {$i < $REPEATS} {incr i} {
 # walcrash-4.*
 #
 for {set i 1} {$i < $REPEATS} {incr i} {
-  file delete -force test.db test.db-wal
-  file delete -force test2.db test2.db-wal
+  forcedelete test.db test.db-wal
+  forcedelete test2.db test2.db-wal
 
   do_test walcrash-4.$i.1 {
     crashsql -delay 3 -file test.db-wal -seed [incr seed] -blocksize 4096 {
@@ -171,8 +171,8 @@ for {set i 1} {$i < $REPEATS} {incr i} {
 # walcrash-5.*
 #
 for {set i 1} {$i < $REPEATS} {incr i} {
-  file delete -force test.db test.db-wal
-  file delete -force test2.db test2.db-wal
+  forcedelete test.db test.db-wal
+  forcedelete test2.db test2.db-wal
 
   do_test walcrash-5.$i.1 {
     crashsql -delay 11 -file test.db-wal -seed [incr seed] -blocksize 4096 {
@@ -212,8 +212,8 @@ for {set i 1} {$i < $REPEATS} {incr i} {
 # walcrash-6.*
 #
 for {set i 1} {$i < $REPEATS} {incr i} {
-  file delete -force test.db test.db-wal
-  file delete -force test2.db test2.db-wal
+  forcedelete test.db test.db-wal
+  forcedelete test2.db test2.db-wal
 
   do_test walcrash-6.$i.1 {
     crashsql -delay 12 -file test.db-wal -seed [incr seed] -blocksize 512 {
@@ -262,7 +262,7 @@ for {set i 1} {$i < $REPEATS} {incr i} {
 # based on the log file.
 #
 for {set i 1} {$i < $REPEATS} {incr i} {
-  file delete -force test.db test.db-wal
+  forcedelete test.db test.db-wal
 
   # Select a page-size for this test.
   #
diff --git a/test/walfault.test b/test/walfault.test
index 3a90f9c6..1b71d78a 100644
--- a/test/walfault.test
+++ b/test/walfault.test
@@ -465,7 +465,7 @@ do_test walfault-13-pre-1 {
     COMMIT;
   }
   faultsim_save_and_close
-  file delete sv_test.db-shm
+  delete_file sv_test.db-shm
 } {}
 
 do_faultsim_test walfault-13.1 -prep {
diff --git a/test/walmode.test b/test/walmode.test
index 11113c6b..4e14d54d 100644
--- a/test/walmode.test
+++ b/test/walmode.test
@@ -295,7 +295,7 @@ db close
 # loaded when sqlite3_prepare_v2() is called to compile the statement.
 #
 do_test walmode-7.0 {
-  file delete -force test.db
+  forcedelete test.db
   sqlite3 db test.db
   execsql {
     PRAGMA journal_mode = WAL;
diff --git a/test/walnoshm.test b/test/walnoshm.test
index de059dd5..d4082178 100644
--- a/test/walnoshm.test
+++ b/test/walnoshm.test
@@ -87,8 +87,8 @@ do_execsql_test 2.1.2 {
 } {exclusive wal}
 
 do_test 2.1.3 {
-  file copy -force test.db     test2.db
-  file copy -force test.db-wal test2.db-wal
+  forcecopy test.db     test2.db
+  forcecopy test.db-wal test2.db-wal
   sqlite3 db2 test2.db
   catchsql { SELECT * FROM t2 } db2
 } {1 {unable to open database file}}
@@ -104,8 +104,8 @@ do_test 2.1.5 {
 } {exclusive delete a b c d e f g h}
 
 do_test 2.2.1 {
-  file copy -force test.db     test2.db
-  file copy -force test.db-wal test2.db-wal
+  forcecopy test.db     test2.db
+  forcecopy test.db-wal test2.db-wal
   sqlite3 db3 test2.db -vfs tvfsshm
   sqlite3 db2 test2.db
   execsql { SELECT * FROM t2 } db3
diff --git a/test/walpersist.test b/test/walpersist.test
new file mode 100644
index 00000000..175dcbf8
--- /dev/null
+++ b/test/walpersist.test
@@ -0,0 +1,73 @@
+# 2011 July 26
+#
+# The author disclaims copyright to this source code.  In place of
+# a legal notice, here is a blessing:
+#
+#    May you do good and not evil.
+#    May you find forgiveness for yourself and forgive others.
+#    May you share freely, never taking more than you give.
+#
+#***********************************************************************
+#
+# This file contains tests for using WAL with persistent WAL file mode.
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+source $testdir/lock_common.tcl
+set ::testprefix walpersist
+
+ifcapable !wal {
+  finish_test
+  return
+}
+
+do_test walpersist-1.0 {
+  db eval {
+    PRAGMA journal_mode=WAL;
+    CREATE TABLE t1(a);
+    INSERT INTO t1 VALUES(randomblob(5000));
+  }
+  file exists test.db-wal
+} {1}
+do_test walpersist-1.1 {
+  file exists test.db-shm
+} {1}
+do_test walpersist-1.2 {
+  db close
+  list [file exists test.db] [file exists test.db-wal] [file exists test.db-shm]
+} {1 0 0}
+do_test walpersist-1.3 {
+  sqlite3 db test.db
+  db eval {SELECT length(a) FROM t1}
+} {5000}
+do_test walpersist-1.4 {
+  list [file exists test.db] [file exists test.db-wal] [file exists test.db-shm]
+} {1 1 1}
+do_test walpersist-1.5 {
+  file_control_persist_wal db -1
+} {0 0}
+do_test walpersist-1.6 {
+  file_control_persist_wal db 1
+} {0 1}
+do_test walpersist-1.7 {
+  file_control_persist_wal db -1
+} {0 1}
+do_test walpersist-1.8 {
+  file_control_persist_wal db 0
+} {0 0}
+do_test walpersist-1.9 {
+  file_control_persist_wal db -1
+} {0 0}
+do_test walpersist-1.10 {
+  file_control_persist_wal db 1
+} {0 1}
+do_test walpersist-1.11 {
+  db close
+  list [file exists test.db] [file exists test.db-wal] [file exists test.db-shm]
+} {1 1 1}
+
+  
+
+
+finish_test
diff --git a/test/walro.test b/test/walro.test
index 60bdce9e..3ae7d53c 100644
--- a/test/walro.test
+++ b/test/walro.test
@@ -24,6 +24,13 @@ if {$::tcl_platform(platform) != "unix"} {
   return
 }
 
+# And only if the build is WAL-capable.
+#
+ifcapable !wal {
+  finish_test
+  return
+}
+
 do_multiclient_test tn {
   # Do not run tests with the connections in the same process.
   #
@@ -136,7 +143,7 @@ do_multiclient_test tn {
   } {1 {unable to open database file}}
 
   # Also test that if the -shm file can be opened for read/write access,
-  # it is, even if readonly_shm=1 is present in the URI.
+  # it is not if readonly_shm=1 is present in the URI.
   do_test 1.3.2.1 {
     code1 { db close }
     code2 { db2 close }
@@ -144,8 +151,8 @@ do_multiclient_test tn {
   } {0}
   do_test 1.3.2.2 {
     code1 { sqlite3 db file:test.db?readonly_shm=1 }
-    sql1 { SELECT * FROM t1 }
-  } {a b c d e f g h i j k l}
+    csql1 { SELECT * FROM sqlite_master }
+  } {1 {unable to open database file}}
   do_test 1.3.2.3 {
     code1 { db close }
     close [open test.db-shm w]
diff --git a/test/walslow.test b/test/walslow.test
index d7269528..83f29228 100644
--- a/test/walslow.test
+++ b/test/walslow.test
@@ -21,7 +21,7 @@ ifcapable !wal {finish_test ; return }
 
 proc reopen_db {} {
   catch { db close }
-  file delete -force test.db test.db-wal
+  forcedelete test.db test.db-wal
   sqlite3 db test.db
   execsql { PRAGMA journal_mode = wal }
 }
@@ -53,9 +53,9 @@ for {set seed 1} {$seed<10} {incr seed} {
     } {ok}
 
     do_test walslow-1.seed=$seed.$iTest.3 {
-      file delete -force testX.db testX.db-wal
-      file copy test.db testX.db
-      file copy test.db-wal testX.db-wal
+      forcedelete testX.db testX.db-wal
+      copy_file test.db testX.db
+      copy_file test.db-wal testX.db-wal
   
       sqlite3 db2 testX.db
       execsql { PRAGMA journal_mode = WAL } db2
diff --git a/test/walthread.test b/test/walthread.test
index 9817c0e0..cbd63718 100644
--- a/test/walthread.test
+++ b/test/walthread.test
@@ -129,7 +129,7 @@ proc do_thread_test {args} {
   puts "Running $P(testname) for $P(seconds) seconds..."
 
   catch { db close }
-  file delete -force test.db test.db-journal test.db-wal
+  forcedelete test.db test.db-journal test.db-wal
 
   sqlite3 db test.db
   eval $P(init)
@@ -508,12 +508,12 @@ do_thread_test walthread-5 -seconds $seconds(walthread-5) -init {
     COMMIT;
   }
 
-  file copy -force test.db-wal bak.db-wal
-  file copy -force test.db bak.db
+  forcecopy test.db-wal bak.db-wal
+  forcecopy test.db bak.db
   db close
 
-  file copy -force bak.db-wal test.db-wal
-  file copy -force bak.db test.db
+  forcecopy bak.db-wal test.db-wal
+  forcecopy bak.db test.db
 
   if {[file size test.db-wal] < [log_file_size [expr 64*1024] 1024]} {
     error "Somehow failed to create a large log file"
diff --git a/test/where3.test b/test/where3.test
index ab75fdec..e08f9051 100644
--- a/test/where3.test
+++ b/test/where3.test
@@ -342,4 +342,87 @@ do_execsql_test where3-5.3 {
   0 0 0 {USE TEMP B-TREE FOR ORDER BY}
 }
 
+# Name resolution with NATURAL JOIN and USING
+#
+do_test where3-6.setup {
+  db eval {
+    CREATE TABLE t6w(a, w);
+    INSERT INTO t6w VALUES(1, 'w-one');
+    INSERT INTO t6w VALUES(2, 'w-two');
+    INSERT INTO t6w VALUES(9, 'w-nine');
+    CREATE TABLE t6x(a, x);
+    INSERT INTO t6x VALUES(1, 'x-one');
+    INSERT INTO t6x VALUES(3, 'x-three');
+    INSERT INTO t6x VALUES(9, 'x-nine');
+    CREATE TABLE t6y(a, y);
+    INSERT INTO t6y VALUES(1, 'y-one');
+    INSERT INTO t6y VALUES(4, 'y-four');
+    INSERT INTO t6y VALUES(9, 'y-nine');
+    CREATE TABLE t6z(a, z);
+    INSERT INTO t6z VALUES(1, 'z-one');
+    INSERT INTO t6z VALUES(5, 'z-five');
+    INSERT INTO t6z VALUES(9, 'z-nine');
+  }
+} {}
+set cnt 0
+foreach predicate {
+   {}
+   {ORDER BY a}
+   {ORDER BY t6w.a}
+   {WHERE a>0}
+   {WHERE t6y.a>0}
+   {WHERE a>0 ORDER BY a}
+} {
+  incr cnt
+  do_test where3-6.$cnt.1 {
+    set sql "SELECT * FROM t6w NATURAL JOIN t6x NATURAL JOIN t6y"
+    append sql " NATURAL JOIN t6z "
+    append sql $::predicate
+    db eval $sql
+  } {1 w-one x-one y-one z-one 9 w-nine x-nine y-nine z-nine}
+  do_test where3-6.$cnt.2 {
+    set sql "SELECT * FROM t6w JOIN t6x USING(a) JOIN t6y USING(a)"
+    append sql " JOIN t6z USING(a) "
+    append sql $::predicate
+    db eval $sql
+  } {1 w-one x-one y-one z-one 9 w-nine x-nine y-nine z-nine}
+  do_test where3-6.$cnt.3 {
+    set sql "SELECT * FROM t6w NATURAL JOIN t6x JOIN t6y USING(a)"
+    append sql " JOIN t6z USING(a) "
+    append sql $::predicate
+    db eval $sql
+  } {1 w-one x-one y-one z-one 9 w-nine x-nine y-nine z-nine}
+  do_test where3-6.$cnt.4 {
+    set sql "SELECT * FROM t6w JOIN t6x USING(a) NATURAL JOIN t6y"
+    append sql " JOIN t6z USING(a) "
+    append sql $::predicate
+    db eval $sql
+  } {1 w-one x-one y-one z-one 9 w-nine x-nine y-nine z-nine}
+  do_test where3-6.$cnt.5 {
+    set sql "SELECT * FROM t6w JOIN t6x USING(a) JOIN t6y USING(a)"
+    append sql " NATURAL JOIN t6z "
+    append sql $::predicate
+    db eval $sql
+  } {1 w-one x-one y-one z-one 9 w-nine x-nine y-nine z-nine}
+  do_test where3-6.$cnt.6 {
+    set sql "SELECT * FROM t6w JOIN t6x USING(a) NATURAL JOIN t6y"
+    append sql " NATURAL JOIN t6z "
+    append sql $::predicate
+    db eval $sql
+  } {1 w-one x-one y-one z-one 9 w-nine x-nine y-nine z-nine}
+  do_test where3-6.$cnt.7 {
+    set sql "SELECT * FROM t6w NATURAL JOIN t6x JOIN t6y USING(a)"
+    append sql " NATURAL JOIN t6z "
+    append sql $::predicate
+    db eval $sql
+  } {1 w-one x-one y-one z-one 9 w-nine x-nine y-nine z-nine}
+  do_test where3-6.$cnt.8 {
+    set sql "SELECT * FROM t6w NATURAL JOIN t6x NATURAL JOIN t6y"
+    append sql " JOIN t6z USING(a) "
+    append sql $::predicate
+    db eval $sql
+  } {1 w-one x-one y-one z-one 9 w-nine x-nine y-nine z-nine}
+}
+
+
 finish_test
diff --git a/test/where7.test b/test/where7.test
index e34778c7..ffb7173d 100644
--- a/test/where7.test
+++ b/test/where7.test
@@ -10,8 +10,6 @@
 #***********************************************************************
 # This file implements regression tests for SQLite library.  The
 # focus of this file is testing the multi-index OR clause optimizer.
-#
-# $Id: where7.test,v 1.9 2009/06/07 23:45:11 drh Exp $
 
 set testdir [file dirname $argv0]
 source $testdir/tester.tcl
@@ -23341,7 +23339,7 @@ do_execsql_test where7-3.1 {
            OR t301.c8 = 1407424651264000)
    ORDER BY t302.c5 LIMIT 200;
 } {
-  0 0 1 {SEARCH TABLE t301 USING COVERING INDEX t301_c4 (c4=?) (~10 rows)} 
+  0 0 1 {SEARCH TABLE t301 USING COVERING INDEX t301_c4 (c4=?) (~5 rows)} 
   0 0 1 {SEARCH TABLE t301 USING INTEGER PRIMARY KEY (rowid=?) (~1 rows)} 
   0 1 0 {SEARCH TABLE t302 USING INDEX t302_c8_c3 (c8=? AND c3>?) (~2 rows)} 
   0 0 0 {USE TEMP B-TREE FOR ORDER BY}
diff --git a/test/where9.test b/test/where9.test
index 9a180116..b4a2d8d1 100644
--- a/test/where9.test
+++ b/test/where9.test
@@ -11,7 +11,6 @@
 # This file implements regression tests for SQLite library.  The
 # focus of this file is testing the multi-index OR clause optimizer.
 #
-# $Id: where9.test,v 1.9 2009/06/05 17:09:12 drh Exp $
 
 set testdir [file dirname $argv0]
 source $testdir/tester.tcl
@@ -365,7 +364,7 @@ ifcapable explain {
   } {
     0 0 0 {SEARCH TABLE t1 USING INTEGER PRIMARY KEY (rowid=?) (~1 rows)} 
     0 1 1 {SEARCH TABLE t2 USING INDEX t2d (d=?) (~2 rows)} 
-    0 1 1 {SEARCH TABLE t2 USING COVERING INDEX t2f (f=?) (~10 rows)}
+    0 1 1 {SEARCH TABLE t2 USING COVERING INDEX t2f (f=?) (~5 rows)}
   }
   do_execsql_test where9-3.2 {
     EXPLAIN QUERY PLAN
@@ -375,7 +374,7 @@ ifcapable explain {
   } {
     0 0 0 {SEARCH TABLE t1 USING INTEGER PRIMARY KEY (rowid=?) (~1 rows)} 
     0 1 1 {SEARCH TABLE t2 USING INDEX t2d (d=?) (~2 rows)} 
-    0 1 1 {SEARCH TABLE t2 USING COVERING INDEX t2f (f=?) (~10 rows)}
+    0 1 1 {SEARCH TABLE t2 USING COVERING INDEX t2f (f=?) (~5 rows)}
   }
 } 
 
@@ -454,8 +453,8 @@ ifcapable explain {
   do_execsql_test where9-5.1 {
     EXPLAIN QUERY PLAN SELECT a FROM t1 WHERE b>1000 AND (c=31031 OR d IS NULL)
   } {
-    0 0 0 {SEARCH TABLE t1 USING INDEX t1c (c=?) (~10 rows)} 
-    0 0 0 {SEARCH TABLE t1 USING INDEX t1d (d=?) (~10 rows)}
+    0 0 0 {SEARCH TABLE t1 USING INDEX t1c (c=?) (~2 rows)} 
+    0 0 0 {SEARCH TABLE t1 USING INDEX t1d (d=?) (~2 rows)}
   }
 
   # In contrast, b=1000 is preferred over any OR-clause.
@@ -783,4 +782,79 @@ do_test where9-6.8.2 {
   }
 } {1 {cannot use index: t1b}}
 
+############################################################################
+# Test cases where terms inside an OR series are combined with AND terms
+# external to the OR clause.  In other words, cases where
+#
+#              x AND (y OR z)
+#
+# is able to use indices on x,y and x,z, or indices y,x and z,x.
+#
+do_test where9-7.0 {
+  execsql {
+    CREATE TABLE t5(a, b, c, d, e, f, g, x, y);
+    INSERT INTO t5
+     SELECT a, b, c, e, d, f, g,
+            CASE WHEN (a&1)!=0 THEN 'y' ELSE 'n' END,
+            CASE WHEN (a&2)!=0 THEN 'y' ELSE 'n' END
+       FROM t1;
+    CREATE INDEX t5xb ON t5(x, b);
+    CREATE INDEX t5xc ON t5(x, c);
+    CREATE INDEX t5xd ON t5(x, d);
+    CREATE INDEX t5xe ON t5(x, e);
+    CREATE INDEX t5xf ON t5(x, f);
+    CREATE INDEX t5xg ON t5(x, g);
+    CREATE INDEX t5yb ON t5(y, b);
+    CREATE INDEX t5yc ON t5(y, c);
+    CREATE INDEX t5yd ON t5(y, d);
+    CREATE INDEX t5ye ON t5(y, e);
+    CREATE INDEX t5yf ON t5(y, f);
+    CREATE INDEX t5yg ON t5(y, g);
+    CREATE TABLE t6(a, b, c, e, d, f, g, x, y);
+    INSERT INTO t6 SELECT * FROM t5;
+    ANALYZE t5;
+  }
+} {}
+do_test where9-7.1.1 {
+  count_steps {
+    SELECT a FROM t5 WHERE x='y' AND (b=913 OR c=27027) ORDER BY a;
+  }
+} {79 81 83 scan 0 sort 1}
+do_test where9-7.1.2 {
+  execsql {
+    SELECT a FROM t6 WHERE x='y' AND (b=913 OR c=27027) ORDER BY a;
+  }
+} {79 81 83}
+do_test where9-7.1.3 {
+  count_steps {
+    SELECT a FROM t5 WHERE x='n' AND (b=913 OR c=27027) ORDER BY a;
+  }
+} {80 scan 0 sort 1}
+do_test where9-7.1.4 {
+  execsql {
+    SELECT a FROM t6 WHERE x='n' AND (b=913 OR c=27027) ORDER BY a;
+  }
+} {80}
+do_test where9-7.2.1 {
+  count_steps {
+    SELECT a FROM t5 WHERE (x='y' OR y='y') AND b=913 ORDER BY a;
+  }
+} {83 scan 0 sort 1}
+do_test where9-7.2.2 {
+  execsql {
+    SELECT a FROM t6 WHERE (x='y' OR y='y') AND b=913 ORDER BY a;
+  }
+} {83}
+do_test where9-7.3.1 {
+  count_steps {
+    SELECT a FROM t5 WHERE (x='y' OR y='y') AND c=27027 ORDER BY a;
+  }
+} {79 81 scan 0 sort 1}
+do_test where9-7.3.2 {
+  execsql {
+    SELECT a FROM t6 WHERE (x='y' OR y='y') AND c=27027 ORDER BY a;
+  }
+} {79 81}
+
+
 finish_test
diff --git a/test/win32lock.test b/test/win32lock.test
new file mode 100644
index 00000000..d014be4d
--- /dev/null
+++ b/test/win32lock.test
@@ -0,0 +1,133 @@
+# 2011 July 11
+#
+# The author disclaims copyright to this source code.  In place of
+# a legal notice, here is a blessing:
+#
+#    May you do good and not evil.
+#    May you find forgiveness for yourself and forgive others.
+#    May you share freely, never taking more than you give.
+#
+#***********************************************************************
+# This file implements regression tests for SQLite library.  The
+# focus of this script is recovery from transient manditory locks
+# that sometimes appear on database files due to anti-virus software.
+#
+
+if {$tcl_platform(platform)!="windows"} return
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+set testprefix win32lock
+
+db close
+sqlite3_shutdown
+test_sqlite3_log xLog
+proc xLog {error_code msg} {
+  lappend ::log $msg 
+}
+sqlite3 db test.db
+
+do_test win32lock-1.1 {
+  db eval {
+    PRAGMA cache_size=10;
+    CREATE TABLE t1(x,y);
+    INSERT INTO t1 VALUES(1,randomblob(100000));
+    INSERT INTO t1 VALUES(2,randomblob(50000));
+    INSERT INTO t1 VALUES(3,randomblob(25000));
+    INSERT INTO t1 VALUES(4,randomblob(12500));
+    SELECT x, length(y) FROM t1 ORDER BY rowid;
+  }
+} {1 100000 2 50000 3 25000 4 12500}
+
+unset -nocomplain delay1 rc msg
+set old_pending_byte [sqlite3_test_control_pending_byte 0x40000000]
+
+set win32_lock_ok [list]
+set win32_lock_error [list]
+set delay1 25
+while {1} {
+  lock_win32_file test.db 0 $::delay1
+  set ::log {}
+  set rc [catch {db eval {SELECT x, length(y) FROM t1 ORDER BY rowid}} msg]
+  if {$rc} {
+    lappend win32_lock_error $::delay1
+    do_test win32lock-1.2-$delay1-error {
+       set ::msg
+    } {disk I/O error}
+  } else {
+    lappend win32_lock_ok $::delay1
+    do_test win32lock-1.2-$delay1-ok {
+       set ::msg
+    } {1 100000 2 50000 3 25000 4 12500}
+    if {[info exists ::log] && $::log!=""} {
+      do_test win32lock-1.2-$delay1-log1 {
+        regsub {\d+} $::log # x
+        set x
+      } {{delayed #ms for lock/sharing conflict}}
+    }
+  }
+  if {[llength $win32_lock_ok] && [llength $win32_lock_error]} break
+  incr delay1 25
+  if {$delay1 > 12500} {
+    puts "Timed out waiting for \"ok\" and \"error\" results."
+    break
+  }
+  sqlite3_sleep 10
+}
+
+do_test win32lock-2.0 {
+  file_control_win32_av_retry db -1 -1
+} {0 10 25}
+do_test win32lock-2.1 {
+  file_control_win32_av_retry db 1 1
+} {0 1 1}
+
+#
+# NOTE: It is known that the win32lock-2.2-* tests may fail if the system is
+#       experiencing heavy load (i.e. they are very timing sensitive).  This is
+#       primarily due to the AV retry delay being set to 1 millisecond in the
+#       win32lock-2.1 test (above).  While it is important to test this corner
+#       case for the AV retry logic, a failure of this test should probably not
+#       be interpreted as a bug in SQLite or these test cases.
+#
+set win32_lock_ok [list]
+set win32_lock_error [list]
+set delay1 1
+while {1} {
+  lock_win32_file test.db 0 $::delay1
+  set ::log {}
+  set rc [catch {db eval {SELECT x, length(y) FROM t1 ORDER BY rowid}} msg]
+  if {$rc} {
+    lappend win32_lock_error $::delay1
+    do_test win32lock-2.2-$delay1-error {
+       set ::msg
+    } {disk I/O error}
+  } else {
+    lappend win32_lock_ok $::delay1
+    do_test win32lock-2.2-$delay1-ok {
+       set ::msg
+    } {1 100000 2 50000 3 25000 4 12500}
+    if {[info exists ::log] && $::log!=""} {
+      do_test win32lock-2.2-$delay1-log1 {
+        regsub {\d+} $::log # x
+        set x
+      } {{delayed #ms for lock/sharing conflict}}
+    }
+  }
+  if {[llength $win32_lock_ok] && [llength $win32_lock_error]} break
+  incr delay1 1
+  if {$delay1 > 500} {
+    puts "Timed out waiting for \"ok\" and \"error\" results."
+    break
+  }
+  sqlite3_sleep 10
+}
+
+file_control_win32_av_retry db 10 25
+sqlite3_test_control_pending_byte $old_pending_byte
+db close
+sqlite3_shutdown
+test_sqlite3_log 
+sqlite3_initialize
+finish_test
diff --git a/tool/extract.c b/tool/extract.c
new file mode 100644
index 00000000..5bf5caa3
--- /dev/null
+++ b/tool/extract.c
@@ -0,0 +1,46 @@
+/*
+** Extract a range of bytes from a file.
+**
+** Usage:
+**
+**    extract FILENAME OFFSET AMOUNT
+**
+** The bytes are written to standard output.
+*/
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(int argc, char **argv){
+  FILE *f;
+  char *zBuf;
+  int ofst;
+  int n;
+  size_t got;
+
+  if( argc!=4 ){
+    fprintf(stderr, "Usage: %s FILENAME OFFSET AMOUNT\n", *argv);
+    return 1;
+  }
+  f = fopen(argv[1], "rb");
+  if( f==0 ){
+    fprintf(stderr, "cannot open \"%s\"\n", argv[1]);
+    return 1;
+  }
+  ofst = atoi(argv[2]);
+  n = atoi(argv[3]);
+  zBuf = malloc( n );
+  if( zBuf==0 ){
+    fprintf(stderr, "out of memory\n");
+    return 1;
+  }
+  fseek(f, ofst, SEEK_SET);
+  got = fread(zBuf, 1, n, f);
+  fclose(f);
+  if( got<n ){
+    fprintf(stderr, "got only %d of %d bytes\n", got, n);
+    return 1;
+  }else{
+    fwrite(zBuf, 1, n, stdout);
+  }
+  return 0;
+}
diff --git a/tool/lemon.c b/tool/lemon.c
index bd2938be..1fb0308b 100644
--- a/tool/lemon.c
+++ b/tool/lemon.c
@@ -2522,6 +2522,7 @@ void Parse(struct lemon *gp)
     ErrorMsg(ps.filename,0,"Can't allocate %d of memory to hold this file.",
       filesize+1);
     gp->errorcnt++;
+    fclose(fp);
     return;
   }
   if( fread(filebuf,1,filesize,fp)!=filesize ){
@@ -2529,6 +2530,7 @@ void Parse(struct lemon *gp)
       filesize);
     free(filebuf);
     gp->errorcnt++;
+    fclose(fp);
     return;
   }
   fclose(fp);
diff --git a/tool/mksqlite3c-noext.tcl b/tool/mksqlite3c-noext.tcl
new file mode 100644
index 00000000..6ad30237
--- /dev/null
+++ b/tool/mksqlite3c-noext.tcl
@@ -0,0 +1,308 @@
+#!/usr/bin/tclsh
+#
+# To build a single huge source file holding all of SQLite (or at
+# least the core components - the test harness, shell, and TCL 
+# interface are omitted.) first do
+#
+#      make target_source
+#
+# The make target above moves all of the source code files into
+# a subdirectory named "tsrc".  (This script expects to find the files
+# there and will not work if they are not found.)  There are a few
+# generated C code files that are also added to the tsrc directory.
+# For example, the "parse.c" and "parse.h" files to implement the
+# the parser are derived from "parse.y" using lemon.  And the 
+# "keywordhash.h" files is generated by a program named "mkkeywordhash".
+#
+# After the "tsrc" directory has been created and populated, run
+# this script:
+#
+#      tclsh mksqlite3c.tcl
+#
+# The amalgamated SQLite code will be written into sqlite3.c
+#
+
+# Begin by reading the "sqlite3.h" header file.  Extract the version number
+# from in this file.  The versioon number is needed to generate the header
+# comment of the amalgamation.
+#
+if {[lsearch $argv --nostatic]>=0} {
+  set addstatic 0
+} else {
+  set addstatic 1
+}
+if {[lsearch $argv --linemacros]>=0} {
+  set linemacros 1
+} else {
+  set linemacros 0
+}
+set in [open tsrc/sqlite3.h]
+set cnt 0
+set VERSION ?????
+while {![eof $in]} {
+  set line [gets $in]
+  if {$line=="" && [eof $in]} break
+  incr cnt
+  regexp {#define\s+SQLITE_VERSION\s+"(.*)"} $line all VERSION
+}
+close $in
+
+# Open the output file and write a header comment at the beginning
+# of the file.
+#
+set out [open sqlite3.c w]
+# Force the output to use unix line endings, even on Windows.
+fconfigure $out -translation lf
+set today [clock format [clock seconds] -format "%Y-%m-%d %H:%M:%S UTC" -gmt 1]
+puts $out [subst \
+{/******************************************************************************
+** This file is an amalgamation of many separate C source files from SQLite
+** version $VERSION.  By combining all the individual C code files into this 
+** single large file, the entire code can be compiled as a single translation
+** unit.  This allows many compilers to do optimizations that would not be
+** possible if the files were compiled separately.  Performance improvements
+** of 5% or more are commonly seen when SQLite is compiled as a single
+** translation unit.
+**
+** This file is all you need to compile SQLite.  To use SQLite in other
+** programs, you need this file and the "sqlite3.h" header file that defines
+** the programming interface to the SQLite library.  (If you do not have 
+** the "sqlite3.h" header file at hand, you will find a copy embedded within
+** the text of this file.  Search for "Begin file sqlite3.h" to find the start
+** of the embedded sqlite3.h header file.) Additional code files may be needed
+** if you want a wrapper to interface SQLite with your choice of programming
+** language. The code for the "sqlite3" command-line shell is also in a
+** separate file. This file contains only code for the core SQLite library.
+*/
+#define SQLITE_CORE 1
+#define SQLITE_AMALGAMATION 1}]
+if {$addstatic} {
+  puts $out \
+{#ifndef SQLITE_PRIVATE
+# define SQLITE_PRIVATE static
+#endif
+#ifndef SQLITE_API
+# define SQLITE_API
+#endif}
+}
+
+# These are the header files used by SQLite.  The first time any of these 
+# files are seen in a #include statement in the C code, include the complete
+# text of the file in-line.  The file only needs to be included once.
+#
+foreach hdr {
+   btree.h
+   btreeInt.h
+   hash.h
+   hwtime.h
+   keywordhash.h
+   mutex.h
+   opcodes.h
+   os_common.h
+   os.h
+   os_os2.h
+   pager.h
+   parse.h
+   pcache.h
+   sqlite3ext.h
+   sqlite3.h
+   sqliteicu.h
+   sqliteInt.h
+   sqliteLimit.h
+   vdbe.h
+   vdbeInt.h
+   wal.h
+} {
+  set available_hdr($hdr) 1
+}
+set available_hdr(sqliteInt.h) 0
+
+# 78 stars used for comment formatting.
+set s78 \
+{*****************************************************************************}
+
+# Insert a comment into the code
+#
+proc section_comment {text} {
+  global out s78
+  set n [string length $text]
+  set nstar [expr {60 - $n}]
+  set stars [string range $s78 0 $nstar]
+  puts $out "/************** $text $stars/"
+}
+
+# Read the source file named $filename and write it into the
+# sqlite3.c output file.  If any #include statements are seen,
+# process them approprately.
+#
+proc copy_file {filename} {
+  global seen_hdr available_hdr out addstatic linemacros
+  set ln 0
+  set tail [file tail $filename]
+  section_comment "Begin file $tail"
+  if {$linemacros} {puts $out "#line 1 \"$filename\""}
+  set in [open $filename r]
+  set varpattern {^[a-zA-Z][a-zA-Z_0-9 *]+(sqlite3[_a-zA-Z0-9]+)(\[|;| =)}
+  set declpattern {[a-zA-Z][a-zA-Z_0-9 ]+ \**(sqlite3[_a-zA-Z0-9]+)\(}
+  if {[file extension $filename]==".h"} {
+    set declpattern " *$declpattern"
+  }
+  set declpattern ^$declpattern
+  while {![eof $in]} {
+    set line [gets $in]
+    incr ln
+    if {[regexp {^\s*#\s*include\s+["<]([^">]+)[">]} $line all hdr]} {
+      if {[info exists available_hdr($hdr)]} {
+        if {$available_hdr($hdr)} {
+          if {$hdr!="os_common.h" && $hdr!="hwtime.h"} {
+            set available_hdr($hdr) 0
+          }
+          section_comment "Include $hdr in the middle of $tail"
+          copy_file tsrc/$hdr
+          section_comment "Continuing where we left off in $tail"
+          if {$linemacros} {puts $out "#line [expr {$ln+1}] \"$filename\""}
+        }
+      } elseif {![info exists seen_hdr($hdr)]} {
+        set seen_hdr($hdr) 1
+        puts $out $line
+      } else {
+        puts $out "/* $line */"
+      }
+    } elseif {[regexp {^#ifdef __cplusplus} $line]} {
+      puts $out "#if 0"
+    } elseif {!$linemacros && [regexp {^#line} $line]} {
+      # Skip #line directives.
+    } elseif {$addstatic && ![regexp {^(static|typedef)} $line]} {
+      regsub {^SQLITE_API } $line {} line
+      if {[regexp $declpattern $line all funcname]} {
+        # Add the SQLITE_PRIVATE or SQLITE_API keyword before functions.
+        # so that linkage can be modified at compile-time.
+        if {[regexp {^sqlite3_} $funcname]} {
+          puts $out "SQLITE_API $line"
+        } else {
+          puts $out "SQLITE_PRIVATE $line"
+        }
+      } elseif {[regexp $varpattern $line all varname]} {
+        # Add the SQLITE_PRIVATE before variable declarations or
+        # definitions for internal use
+        if {![regexp {^sqlite3_} $varname]} {
+          regsub {^extern } $line {} line
+          puts $out "SQLITE_PRIVATE $line"
+        } else {
+          if {[regexp {const char sqlite3_version\[\];} $line]} {
+            set line {const char sqlite3_version[] = SQLITE_VERSION;}
+          }
+          regsub {^SQLITE_EXTERN } $line {} line
+          puts $out "SQLITE_API $line"
+        }
+      } elseif {[regexp {^(SQLITE_EXTERN )?void \(\*sqlite3IoTrace\)} $line]} {
+        regsub {^SQLITE_EXTERN } $line {} line
+        puts $out "SQLITE_PRIVATE $line"
+      } elseif {[regexp {^void \(\*sqlite3Os} $line]} {
+        puts $out "SQLITE_PRIVATE $line"
+      } else {
+        puts $out $line
+      }
+    } else {
+      puts $out $line
+    }
+  }
+  close $in
+  section_comment "End of $tail"
+}
+
+
+# Process the source files.  Process files containing commonly
+# used subroutines first in order to help the compiler find
+# inlining opportunities.
+#
+foreach file {
+   sqliteInt.h
+
+   global.c
+   ctime.c
+   status.c
+   date.c
+   os.c
+
+   fault.c
+   mem0.c
+   mem1.c
+   mem2.c
+   mem3.c
+   mem5.c
+   mutex.c
+   mutex_noop.c
+   mutex_os2.c
+   mutex_unix.c
+   mutex_w32.c
+   malloc.c
+   printf.c
+   random.c
+   utf.c
+   util.c
+   hash.c
+   opcodes.c
+
+   os_os2.c
+   os_unix.c
+   os_win.c
+
+   bitvec.c
+   pcache.c
+   pcache1.c
+   rowset.c
+   pager.c
+   wal.c
+
+   btmutex.c
+   btree.c
+   backup.c
+
+   vdbemem.c
+   vdbeaux.c
+   vdbeapi.c
+   vdbetrace.c
+   vdbe.c
+   vdbeblob.c
+   vdbesort.c
+   journal.c
+   memjournal.c
+
+   walker.c
+   resolve.c
+   expr.c
+   alter.c
+   analyze.c
+   attach.c
+   auth.c
+   build.c
+   callback.c
+   delete.c
+   func.c
+   fkey.c
+   insert.c
+   legacy.c
+   loadext.c
+   pragma.c
+   prepare.c
+   select.c
+   table.c
+   trigger.c
+   update.c
+   vacuum.c
+   vtab.c
+   where.c
+
+   parse.c
+
+   tokenize.c
+   complete.c
+
+   main.c
+   notify.c
+} {
+  copy_file tsrc/$file
+}
+
+close $out
diff --git a/tool/mksqlite3c.tcl b/tool/mksqlite3c.tcl
index ab7efcc0..09ebb7c0 100644
--- a/tool/mksqlite3c.tcl
+++ b/tool/mksqlite3c.tcl
@@ -31,6 +31,11 @@ if {[lsearch $argv --nostatic]>=0} {
 } else {
   set addstatic 1
 }
+if {[lsearch $argv --linemacros]>=0} {
+  set linemacros 1
+} else {
+  set linemacros 0
+}
 set in [open tsrc/sqlite3.h]
 set cnt 0
 set VERSION ?????
@@ -137,9 +142,11 @@ proc section_comment {text} {
 # process them approprately.
 #
 proc copy_file {filename} {
-  global seen_hdr available_hdr out addstatic
+  global seen_hdr available_hdr out addstatic linemacros
+  set ln 0
   set tail [file tail $filename]
   section_comment "Begin file $tail"
+  if {$linemacros} {puts $out "#line 1 \"$filename\""}
   set in [open $filename r]
   set varpattern {^[a-zA-Z][a-zA-Z_0-9 *]+(sqlite3[_a-zA-Z0-9]+)(\[|;| =)}
   set declpattern {[a-zA-Z][a-zA-Z_0-9 ]+ \**(sqlite3[_a-zA-Z0-9]+)\(}
@@ -149,6 +156,7 @@ proc copy_file {filename} {
   set declpattern ^$declpattern
   while {![eof $in]} {
     set line [gets $in]
+    incr ln
     if {[regexp {^\s*#\s*include\s+["<]([^">]+)[">]} $line all hdr]} {
       if {[info exists available_hdr($hdr)]} {
         if {$available_hdr($hdr)} {
@@ -158,14 +166,17 @@ proc copy_file {filename} {
           section_comment "Include $hdr in the middle of $tail"
           copy_file tsrc/$hdr
           section_comment "Continuing where we left off in $tail"
+          if {$linemacros} {puts $out "#line [expr {$ln+1}] \"$filename\""}
         }
       } elseif {![info exists seen_hdr($hdr)]} {
         set seen_hdr($hdr) 1
         puts $out $line
+      } else {
+        puts $out "/* $line */"
       }
     } elseif {[regexp {^#ifdef __cplusplus} $line]} {
       puts $out "#if 0"
-    } elseif {[regexp {^#line} $line]} {
+    } elseif {!$linemacros && [regexp {^#line} $line]} {
       # Skip #line directives.
     } elseif {$addstatic && ![regexp {^(static|typedef)} $line]} {
       regsub {^SQLITE_API } $line {} line
@@ -263,6 +274,7 @@ foreach file {
    vdbetrace.c
    vdbe.c
    vdbeblob.c
+   vdbesort.c
    journal.c
    memjournal.c
 
diff --git a/tool/offsets.c b/tool/offsets.c
new file mode 100644
index 00000000..8e098e71
--- /dev/null
+++ b/tool/offsets.c
@@ -0,0 +1,329 @@
+/*
+** This program searches an SQLite database file for the lengths and
+** offsets for all TEXT or BLOB entries for a particular column of a
+** particular table.  The rowid, size and offset for the column are
+** written to standard output.  There are three arguments, which are the
+** name of the database file, the table, and the column.
+*/
+#include "sqlite3.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+
+typedef unsigned char u8;
+typedef struct GState GState;
+
+#define ArraySize(X)   (sizeof(X)/sizeof(X[0]))
+
+/*
+** Global state information for this program.
+*/
+struct GState {
+  char *zErr;           /* Error message text */
+  FILE *f;              /* Open database file */
+  int szPg;             /* Page size for the database file */
+  int iRoot;            /* Root page of the table */
+  int iCol;             /* Column number for the column */
+  int pgno;             /* Current page number */
+  u8 *aPage;            /* Current page content */
+  u8 *aStack[20];       /* Page stack */
+  int aPgno[20];        /* Page number stack */
+  int nStack;           /* Depth of stack */
+  int bTrace;           /* True for tracing output */
+};
+
+/*
+** Write an error.
+*/
+static void ofstError(GState *p, const char *zFormat, ...){
+  va_list ap;
+  sqlite3_free(p->zErr);
+  va_start(ap, zFormat);
+  p->zErr = sqlite3_vmprintf(zFormat, ap);
+  va_end(ap);
+}
+
+/*
+** Write a trace message
+*/
+static void ofstTrace(GState *p, const char *zFormat, ...){
+  va_list ap;
+  if( p->bTrace ){
+    va_start(ap, zFormat);
+    vprintf(zFormat, ap);
+    va_end(ap);
+  }
+}
+
+/*
+** Find the root page of the table and the column number of the column.
+*/
+static void ofstRootAndColumn(
+  GState *p,              /* Global state */
+  const char *zFile,      /* Name of the database file */
+  const char *zTable,     /* Name of the table */
+  const char *zColumn     /* Name of the column */
+){
+  sqlite3 *db = 0;
+  sqlite3_stmt *pStmt = 0;
+  char *zSql = 0;
+  int rc;
+  if( p->zErr ) return;
+  rc = sqlite3_open(zFile, &db);
+  if( rc ){
+    ofstError(p, "cannot open database file \"%s\"", zFile);
+    goto rootAndColumn_exit;
+  }
+  zSql = sqlite3_mprintf("SELECT rootpage FROM sqlite_master WHERE name=%Q",
+                         zTable);
+  rc = sqlite3_prepare_v2(db, zSql, -1, &pStmt, 0);
+  if( rc ) ofstError(p, "%s: [%s]", sqlite3_errmsg(db), zSql);
+  sqlite3_free(zSql);
+  if( p->zErr ) goto rootAndColumn_exit;
+  if( sqlite3_step(pStmt)!=SQLITE_ROW ){
+    ofstError(p, "cannot find table [%s]\n", zTable);
+    sqlite3_finalize(pStmt);
+    goto rootAndColumn_exit;
+  }
+  p->iRoot = sqlite3_column_int(pStmt , 0);
+  sqlite3_finalize(pStmt);
+
+  p->iCol = -1;
+  zSql = sqlite3_mprintf("PRAGMA table_info(%Q)", zTable);
+  rc = sqlite3_prepare_v2(db, zSql, -1, &pStmt, 0);
+  if( rc ) ofstError(p, "%s: [%s}", sqlite3_errmsg(db), zSql);
+  sqlite3_free(zSql);
+  if( p->zErr ) goto rootAndColumn_exit;
+  while( sqlite3_step(pStmt)==SQLITE_ROW ){
+    const char *zCol = sqlite3_column_text(pStmt, 1);
+    if( strlen(zCol)==strlen(zColumn)
+     && sqlite3_strnicmp(zCol, zColumn, strlen(zCol))==0
+    ){
+      p->iCol = sqlite3_column_int(pStmt, 0);
+      break;
+    }
+  }
+  sqlite3_finalize(pStmt);
+  if( p->iCol<0 ){
+    ofstError(p, "no such column: %s.%s", zTable, zColumn);
+    goto rootAndColumn_exit;
+  }
+
+  zSql = sqlite3_mprintf("PRAGMA page_size");
+  rc = sqlite3_prepare_v2(db, zSql, -1, &pStmt, 0);
+  if( rc )  ofstError(p, "%s: [%s]", sqlite3_errmsg(db), zSql);
+  sqlite3_free(zSql);
+  if( p->zErr ) goto rootAndColumn_exit;
+  if( sqlite3_step(pStmt)!=SQLITE_ROW ){
+    ofstError(p, "cannot find page size");
+  }else{
+    p->szPg = sqlite3_column_int(pStmt, 0);
+  }
+  sqlite3_finalize(pStmt);
+
+rootAndColumn_exit:
+  sqlite3_close(db);
+  return;
+}
+
+/*
+** Pop a page from the stack
+*/
+static void ofstPopPage(GState *p){
+  if( p->nStack<=0 ) return;
+  p->nStack--;
+  sqlite3_free(p->aStack[p->nStack]);
+  p->pgno = p->aPgno[p->nStack-1];
+  p->aPage = p->aStack[p->nStack-1];
+}
+
+
+/*
+** Push a new page onto the stack.
+*/
+static void ofstPushPage(GState *p, int pgno){
+  u8 *pPage;
+  size_t got;
+  if( p->zErr ) return;
+  if( p->nStack >= ArraySize(p->aStack) ){
+    ofstError(p, "page stack overflow");
+    return;
+  }
+  p->aPgno[p->nStack] = pgno;
+  p->aStack[p->nStack] = pPage = sqlite3_malloc( p->szPg );
+  if( pPage==0 ){
+    fprintf(stderr, "out of memory\n");
+    exit(1);
+  }
+  p->nStack++;
+  p->aPage = pPage;
+  p->pgno = pgno;
+  fseek(p->f, (pgno-1)*p->szPg, SEEK_SET);
+  got = fread(pPage, 1, p->szPg, p->f);
+  if( got!=p->szPg ){
+    ofstError(p, "unable to read page %d", pgno);
+    ofstPopPage(p);
+  }
+}
+
+/* Read a two-byte integer at the given offset into the current page */
+static int ofst2byte(GState *p, int ofst){
+  int x = p->aPage[ofst];
+  return (x<<8) + p->aPage[ofst+1];
+}
+
+/* Read a four-byte integer at the given offset into the current page */
+static int ofst4byte(GState *p, int ofst){
+  int x = p->aPage[ofst];
+  x = (x<<8) + p->aPage[ofst+1];
+  x = (x<<8) + p->aPage[ofst+2];
+  x = (x<<8) + p->aPage[ofst+3];
+  return x;
+}
+
+/* Read a variable-length integer.  Update the offset */
+static sqlite3_int64 ofstVarint(GState *p, int *pOfst){
+  sqlite3_int64 x = 0;
+  u8 *a = &p->aPage[*pOfst];
+  int n = 0;
+  while( n<8 && (a[0] & 0x80)!=0 ){
+    x = (x<<7) + (a[0] & 0x7f);
+    n++;
+    a++;
+  }
+  if( n==8 ){
+    x = (x<<8) + a[0];
+  }else{
+    x = (x<<7) + a[0];
+  }
+  *pOfst += (n+1);
+  return x;
+}
+
+/* Return the absolute offset into a file for the given offset
+** into the current page */
+static int ofstInFile(GState *p, int ofst){
+  return p->szPg*(p->pgno-1) + ofst;
+}
+
+/* Return the size (in bytes) of the data corresponding to the
+** given serial code */
+static int ofstSerialSize(int scode){
+  if( scode<5 ) return scode;
+  if( scode==5 ) return 6;
+  if( scode<8 ) return 8;
+  if( scode<12 ) return 0;
+  return (scode-12)/2;
+}
+
+/* Forward reference */
+static void ofstWalkPage(GState*, int);
+
+/* Walk an interior btree page */
+static void ofstWalkInteriorPage(GState *p){
+  int nCell;
+  int i;
+  int ofst;
+  int iChild;
+
+  nCell = ofst2byte(p, 3);
+  for(i=0; i<nCell; i++){
+    ofst = ofst2byte(p, 12+i*2);
+    iChild = ofst4byte(p, ofst);
+    ofstWalkPage(p, iChild);
+    if( p->zErr ) return;
+  }
+  ofstWalkPage(p, ofst4byte(p, 8));
+}
+
+/* Walk a leaf btree page */
+static void ofstWalkLeafPage(GState *p){
+  int nCell;
+  int i;
+  int ofst;
+  int nPayload;
+  sqlite3_int64 rowid;
+  int nHdr;
+  int j;
+  int scode;
+  int sz;
+  int dataOfst;
+  char zMsg[200];
+
+  nCell = ofst2byte(p, 3);
+  for(i=0; i<nCell; i++){
+    ofst = ofst2byte(p, 8+i*2);
+    nPayload = ofstVarint(p, &ofst);
+    rowid = ofstVarint(p, &ofst);
+    if( nPayload > p->szPg-35 ){
+      sqlite3_snprintf(sizeof(zMsg), zMsg,
+         "# overflow rowid %lld", rowid);
+      printf("%s\n", zMsg);
+      continue;
+    }
+    dataOfst = ofst;
+    nHdr = ofstVarint(p, &ofst);
+    dataOfst += nHdr;
+    for(j=0; j<p->iCol; j++){
+      scode = ofstVarint(p, &ofst);
+      dataOfst += ofstSerialSize(scode);
+    }
+    scode = ofstVarint(p, &ofst);
+    sz = ofstSerialSize(scode);
+    sqlite3_snprintf(sizeof(zMsg), zMsg,
+         "rowid %12lld size %5d offset %8d",
+          rowid, sz, ofstInFile(p, dataOfst));
+    printf("%s\n", zMsg);
+  }
+}
+
+/*
+** Output results from a single page.
+*/
+static void ofstWalkPage(GState *p, int pgno){
+  if( p->zErr ) return;
+  ofstPushPage(p, pgno);
+  if( p->zErr ) return;
+  if( p->aPage[0]==5 ){
+    ofstWalkInteriorPage(p);
+  }else if( p->aPage[0]==13 ){
+    ofstWalkLeafPage(p);
+  }else{
+    ofstError(p, "page %d has a faulty type byte: %d", pgno, p->aPage[0]);
+  }
+  ofstPopPage(p);
+}
+
+int main(int argc, char **argv){
+  GState g;
+  memset(&g, 0, sizeof(g));
+  if( argc>2 && strcmp(argv[1],"--trace")==0 ){
+    g.bTrace = 1;
+    argc--;
+    argv++;
+  }
+  if( argc!=4 ){
+    fprintf(stderr, "Usage: %s DATABASE TABLE COLUMN\n", *argv);
+    exit(1);
+  }
+  ofstRootAndColumn(&g, argv[1], argv[2], argv[3]);
+  if( g.zErr ){
+    fprintf(stderr, "%s\n", g.zErr);
+    exit(1);
+  }
+  ofstTrace(&g, "# szPg = %d\n", g.szPg);
+  ofstTrace(&g, "# iRoot = %d\n", g.iRoot);
+  ofstTrace(&g, "# iCol = %d\n", g.iCol);
+  g.f = fopen(argv[1], "rb");
+  if( g.f==0 ){
+    fprintf(stderr, "cannot open \"%s\"\n", argv[1]);
+    exit(1);
+  }
+  ofstWalkPage(&g, g.iRoot);
+  if( g.zErr ){
+    fprintf(stderr, "%s\n", g.zErr);
+    exit(1);
+  }
+  return 0; 
+}
diff --git a/tool/omittest.tcl b/tool/omittest.tcl
index 33a71cee..7f13a4cb 100644
--- a/tool/omittest.tcl
+++ b/tool/omittest.tcl
@@ -48,19 +48,18 @@ they do not respect the OPTS variable.
 #
 #
 proc run_quick_test {dir omit_symbol_list} {
-  set target "testfixture"
   # Compile the value of the OPTS Makefile variable.
-  set opts "-DSQLITE_MEMDEBUG -DSQLITE_DEBUG -DSQLITE_NO_SYNC" 
+  set opts ""
   if {$::tcl_platform(platform)=="windows"} {
-    append opts " -DSQLITE_OS_WIN=1"
+    append opts "OPTS += -DSQLITE_OS_WIN=1\n"
     set target "testfixture.exe"
   } elseif {$::tcl_platform(platform)=="os2"} {
-    append opts " -DSQLITE_OS_OS2=1"
+    append opts "OPTS += -DSQLITE_OS_OS2=1\n"
   } else {
-    append opts " -DSQLITE_OS_UNIX=1"
+    append opts "OPTS += -DSQLITE_OS_UNIX=1\n"
   }
   foreach sym $omit_symbol_list {
-    append opts " -D${sym}=1"
+    append opts "OPTS += -D${sym}=1\n"
   }
 
   # Create the directory and do the build. If an error occurs return
@@ -68,12 +67,20 @@ proc run_quick_test {dir omit_symbol_list} {
   file mkdir $dir
   puts -nonewline "Building $dir..."
   flush stdout
-catch {
-  file copy -force ./config.h $dir
-  file copy -force ./libtool $dir
-}
+  catch {
+    file copy -force ./config.h $dir
+    file copy -force ./libtool $dir
+  }
+  set fd [open $::MAKEFILE]
+  set mkfile [read $fd]
+  close $fd
+  regsub {\ninclude} $mkfile "\n$opts\ninclude" mkfile
+  set fd [open $dir/makefile w]
+  puts $fd $mkfile
+  close $fd
+  
   set rc [catch {
-    exec $::MAKEBIN -C $dir -f $::MAKEFILE clean $target OPTS=$opts >& $dir/build.log
+    exec $::MAKEBIN -C $dir -f makefile clean $::TARGET >& $dir/build.log
   }]
   if {$rc} {
     puts "No good. See $dir/build.log."
@@ -102,7 +109,7 @@ catch {
     puts -nonewline "Testing $dir..."
     flush stdout
     set rc [catch {
-      exec $::MAKEBIN -C $dir -f $::MAKEFILE test OPTS=$opts >& $dir/test.log
+      exec $::MAKEBIN -C $dir -f makefile test >& $dir/test.log
     }]
     if {$rc} {
       puts "No good. See $dir/test.log."
@@ -126,6 +133,7 @@ proc process_options {argv} {
     set ::MAKEFILE ./Makefile.linux-gcc     ;# Default value
   }
   set ::SKIP_RUN 0                          ;# Default to attempt test
+  set ::TARGET testfixture                  ;# Default thing to build
 
   for {set i 0} {$i < [llength $argv]} {incr i} {
     switch -- [lindex $argv $i] {
@@ -139,6 +147,11 @@ proc process_options {argv} {
         set ::MAKEFILE ./Makefile.msc
       }
 
+      -target {
+        incr i
+        set ::TARGET [lindex $argv $i]
+      }
+
       -skip_run {
         set ::SKIP_RUN 1
       }
@@ -182,7 +195,6 @@ proc main {argv} {
     SQLITE_OMIT_DATETIME_FUNCS \
     SQLITE_OMIT_DECLTYPE \
     SQLITE_OMIT_DEPRECATED \
-    xxxSQLITE_OMIT_DISKIO \
     SQLITE_OMIT_EXPLAIN \
     SQLITE_OMIT_FLAG_PRAGMAS \
     SQLITE_OMIT_FLOATING_POINT \
@@ -224,15 +236,11 @@ proc main {argv} {
     SQLITE_DISABLE_DIRSYNC \
     SQLITE_DISABLE_LFS \
     SQLITE_ENABLE_ATOMIC_WRITE \
-    xxxSQLITE_ENABLE_CEROD \
     SQLITE_ENABLE_COLUMN_METADATA \
     SQLITE_ENABLE_EXPENSIVE_ASSERT \
-    xxxSQLITE_ENABLE_FTS1 \
-    xxxSQLITE_ENABLE_FTS2 \
     SQLITE_ENABLE_FTS3 \
     SQLITE_ENABLE_FTS3_PARENTHESIS \
     SQLITE_ENABLE_FTS4 \
-    xxxSQLITE_ENABLE_ICU \
     SQLITE_ENABLE_IOTRACE \
     SQLITE_ENABLE_LOAD_EXTENSION \
     SQLITE_ENABLE_LOCKING_STYLE \
@@ -241,7 +249,7 @@ proc main {argv} {
     SQLITE_ENABLE_MEMSYS5 \
     SQLITE_ENABLE_OVERSIZE_CELL_CHECK \
     SQLITE_ENABLE_RTREE \
-    SQLITE_ENABLE_STAT2 \
+    SQLITE_ENABLE_STAT3 \
     SQLITE_ENABLE_UNLOCK_NOTIFY \
     SQLITE_ENABLE_UPDATE_DELETE_LIMIT \
   ]
diff --git a/tool/spaceanal.tcl b/tool/spaceanal.tcl
index bf6244e8..3dddfe42 100644
--- a/tool/spaceanal.tcl
+++ b/tool/spaceanal.tcl
@@ -4,15 +4,32 @@
 #
 
 if {[catch {
-
 # Get the name of the database to analyze
 #
-#set argv $argv0
-if {[llength $argv]!=1} {
+proc usage {} {
+  set argv0 [file rootname [file tail [info nameofexecutable]]]
   puts stderr "Usage: $argv0 database-name"
   exit 1
 }
-set file_to_analyze [lindex $argv 0]
+set file_to_analyze {}
+set flags(-pageinfo) 0
+set flags(-stats) 0
+append argv {}
+foreach arg $argv {
+  if {[regexp {^-+pageinfo$} $arg]} {
+    set flags(-pageinfo) 1
+  } elseif {[regexp {^-+stats$} $arg]} {
+    set flags(-stats) 1
+  } elseif {[regexp {^-} $arg]} {
+    puts stderr "Unknown option: $arg"
+    usage
+  } elseif {$file_to_analyze!=""} {
+    usage
+  } else {
+    set file_to_analyze $arg
+  }
+}
+if {$file_to_analyze==""} usage
 if {![file exists $file_to_analyze]} {
   puts stderr "No such file: $file_to_analyze"
   exit 1
@@ -21,19 +38,76 @@ if {![file readable $file_to_analyze]} {
   puts stderr "File is not readable: $file_to_analyze"
   exit 1
 }
-if {[file size $file_to_analyze]<512} {
+set true_file_size [file size $file_to_analyze]
+if {$true_file_size<512} {
   puts stderr "Empty or malformed database: $file_to_analyze"
   exit 1
 }
 
+# Compute the total file size assuming test_multiplexor is being used.
+# Assume that SQLITE_ENABLE_8_3_NAMES might be enabled
+#
+set extension [file extension $file_to_analyze]
+set pattern $file_to_analyze
+append pattern {[0-9][0-9]}
+foreach f [glob -nocomplain $pattern] {
+  incr true_file_size [file size $f]
+  set extension {}
+}
+if {[string length $extension]>=2 && [string length $extension]<=4} {
+  set pattern [file rootname $file_to_analyze]
+  append pattern [string range $extension 0 1]
+  append pattern {[0-9][0-9]}
+  foreach f [glob -nocomplain $pattern] {
+    incr true_file_size [file size $f]
+  }
+}
+
 # Open the database
 #
-sqlite3 db [lindex $argv 0]
+sqlite3 db $file_to_analyze
 register_dbstat_vtab db
 
-set pageSize [db one {PRAGMA page_size}]
+db eval {SELECT count(*) FROM sqlite_master}
+set pageSize [expr {wide([db one {PRAGMA page_size}])}]
 
-#set DB [btree_open [lindex $argv 0] 1000 0]
+if {$flags(-pageinfo)} {
+  db eval {CREATE VIRTUAL TABLE temp.stat USING dbstat}
+  db eval {SELECT name, path, pageno FROM temp.stat ORDER BY pageno} {
+    puts "$pageno $name $path"
+  }
+  exit 0
+}
+if {$flags(-stats)} {
+  db eval {CREATE VIRTUAL TABLE temp.stat USING dbstat}
+  puts "BEGIN;"
+  puts "CREATE TABLE stats("
+  puts "  name       STRING,           /* Name of table or index */"
+  puts "  path       INTEGER,          /* Path to page from root */"
+  puts "  pageno     INTEGER,          /* Page number */"
+  puts "  pagetype   STRING,           /* 'internal', 'leaf' or 'overflow' */"
+  puts "  ncell      INTEGER,          /* Cells on page (0 for overflow) */"
+  puts "  payload    INTEGER,          /* Bytes of payload on this page */"
+  puts "  unused     INTEGER,          /* Bytes of unused space on this page */"
+  puts "  mx_payload INTEGER,          /* Largest payload size of all cells */"
+  puts "  pgoffset   INTEGER,          /* Offset of page in file */"
+  puts "  pgsize     INTEGER           /* Size of the page */"
+  puts ");"
+  db eval {SELECT quote(name) || ',' ||
+                  quote(path) || ',' ||
+                  quote(pageno) || ',' ||
+                  quote(pagetype) || ',' ||
+                  quote(ncell) || ',' ||
+                  quote(payload) || ',' ||
+                  quote(unused) || ',' ||
+                  quote(mx_payload) || ',' ||
+                  quote(pgoffset) || ',' ||
+                  quote(pgsize) AS x FROM stat} {
+    puts "INSERT INTO stats VALUES($x);"
+  }
+  puts "COMMIT;"
+  exit 0
+}
 
 # In-memory database for collecting statistics. This script loops through
 # the tables and indices in the database being analyzed, adding a row for each
@@ -41,8 +115,7 @@ set pageSize [db one {PRAGMA page_size}]
 # queries the in-memory db to produce the space-analysis report.
 #
 sqlite3 mem :memory:
-set tabledef\
-{CREATE TABLE space_used(
+set tabledef {CREATE TABLE space_used(
    name clob,        -- Name of a table or index in the database file
    tblname clob,     -- Name of associated table
    is_index boolean, -- TRUE if it is an index, false for a table
@@ -58,17 +131,17 @@ set tabledef\
    int_unused int,   -- Number of unused bytes on interior pages
    leaf_unused int,  -- Number of unused bytes on primary pages
    ovfl_unused int,  -- Number of unused bytes on overflow pages
-   gap_cnt int       -- Number of gaps in the page layout
+   gap_cnt int,      -- Number of gaps in the page layout
+   compressed_size int  -- Total bytes stored on disk
 );}
 mem eval $tabledef
 
 # Create a temporary "dbstat" virtual table.
 #
-db eval { 
-  CREATE VIRTUAL TABLE temp.stat USING dbstat;
-  CREATE TEMP TABLE dbstat AS SELECT * FROM temp.stat ORDER BY name, path;
-  DROP TABLE temp.stat;
-}
+db eval {CREATE VIRTUAL TABLE temp.stat USING dbstat}
+db eval {CREATE TEMP TABLE dbstat AS SELECT * FROM temp.stat
+         ORDER BY name, path}
+db eval {DROP TABLE temp.stat}
 
 proc isleaf {pagetype is_index} {
   return [expr {$pagetype == "leaf" || ($pagetype == "internal" && $is_index)}]
@@ -84,6 +157,8 @@ db func isleaf isleaf
 db func isinternal isinternal
 db func isoverflow isoverflow
 
+set isCompressed 0
+set compressOverhead 0
 set sql { SELECT name, tbl_name FROM sqlite_master WHERE rootpage>0 }
 foreach {name tblname} [concat sqlite_master sqlite_master [db eval $sql]] {
 
@@ -101,10 +176,18 @@ foreach {name tblname} [concat sqlite_master sqlite_master [db eval $sql]] {
       sum(isoverflow(pagetype, $is_index)) AS ovfl_pages,
       sum(isinternal(pagetype, $is_index) * unused) AS int_unused,
       sum(isleaf(pagetype, $is_index) * unused) AS leaf_unused,
-      sum(isoverflow(pagetype, $is_index) * unused) AS ovfl_unused
+      sum(isoverflow(pagetype, $is_index) * unused) AS ovfl_unused,
+      sum(pgsize) AS compressed_size
     FROM temp.dbstat WHERE name = $name
   } break
 
+  set total_pages [expr {$leaf_pages+$int_pages+$ovfl_pages}]
+  set storage [expr {$total_pages*$pageSize}]
+  if {!$isCompressed && $storage>$compressed_size} {
+    set isCompressed 1
+    set compressOverhead 14
+  }
+
   # Column 'gap_cnt' is set to the number of non-contiguous entries in the
   # list of pages visited if the b-tree structure is traversed in a top-down
   # fashion (each node visited before its child-tree is passed). Any overflow
@@ -138,14 +221,15 @@ foreach {name tblname} [concat sqlite_master sqlite_master [db eval $sql]] {
       $int_unused, 
       $leaf_unused,
       $ovfl_unused,
-      $gap_cnt
+      $gap_cnt,
+      $compressed_size
     );
   }
 }
 
 proc integerify {real} {
   if {[string is double -strict $real]} {
-    return [expr {int($real)}]
+    return [expr {wide($real)}]
   } else {
     return 0
   }
@@ -200,7 +284,7 @@ proc divide {num denom} {
 # the $where clause determines which subset to analyze.
 #
 proc subreport {title where} {
-  global pageSize file_pgcnt
+  global pageSize file_pgcnt compressOverhead
 
   # Query the in-memory database for the sum of various statistics 
   # for the subset of tables/indices identified by the WHERE clause in
@@ -224,7 +308,8 @@ proc subreport {title where} {
       int(sum(leaf_unused)) AS leaf_unused,
       int(sum(int_unused)) AS int_unused,
       int(sum(ovfl_unused)) AS ovfl_unused,
-      int(sum(gap_cnt)) AS gap_cnt
+      int(sum(gap_cnt)) AS gap_cnt,
+      int(sum(compressed_size)) AS compressed_size
     FROM space_used WHERE $where" {} {}
 
   # Output the sub-report title, nicely decorated with * characters.
@@ -274,6 +359,12 @@ proc subreport {title where} {
   statline {Percentage of total database} $total_pages_percent
   statline {Number of entries} $nleaf
   statline {Bytes of storage consumed} $storage
+  if {$compressed_size!=$storage} {
+    set compressed_size [expr {$compressed_size+$compressOverhead*$total_pages}]
+    set pct [expr {$compressed_size*100.0/$storage}]
+    set pct [format {%5.1f%%} $pct]
+    statline {Bytes used after compression} $compressed_size $pct
+  }
   statline {Bytes of payload} $payload $payload_percent
   statline {Average payload per entry} $avg_payload
   statline {Average unused bytes per entry} $avg_unused
@@ -293,16 +384,16 @@ proc subreport {title where} {
   statline {Overflow pages used} $ovfl_pages
   statline {Total pages used} $total_pages
   if {$int_unused>0} {
-    set int_unused_percent \
-         [percent $int_unused [expr {$int_pages*$pageSize}] {of index space}]
+    set int_unused_percent [
+         percent $int_unused [expr {$int_pages*$pageSize}] {of index space}]
     statline "Unused bytes on index pages" $int_unused $int_unused_percent
   }
-  statline "Unused bytes on primary pages" $leaf_unused \
-     [percent $leaf_unused [expr {$leaf_pages*$pageSize}] {of primary space}]
-  statline "Unused bytes on overflow pages" $ovfl_unused \
-     [percent $ovfl_unused [expr {$ovfl_pages*$pageSize}] {of overflow space}]
-  statline "Unused bytes on all pages" $total_unused \
-               [percent $total_unused $storage {of all space}]
+  statline "Unused bytes on primary pages" $leaf_unused [
+     percent $leaf_unused [expr {$leaf_pages*$pageSize}] {of primary space}]
+  statline "Unused bytes on overflow pages" $ovfl_unused [
+     percent $ovfl_unused [expr {$ovfl_pages*$pageSize}] {of overflow space}]
+  statline "Unused bytes on all pages" $total_unused [
+               percent $total_unused $storage {of all space}]
   return 1
 }
 
@@ -330,7 +421,7 @@ proc autovacuum_overhead {filePages pageSize} {
   set ptrsPerPage [expr double($pageSize/5)]
 
   # Return the number of pointer map pages in the database.
-  return [expr int(ceil( ($filePages-1.0)/($ptrsPerPage+1.0) ))]
+  return [expr wide(ceil( ($filePages-1.0)/($ptrsPerPage+1.0) ))]
 }
 
 
@@ -357,17 +448,24 @@ proc autovacuum_overhead {filePages pageSize} {
 #                (not including sqlite_master)
 # user_percent:  $user_payload as a percentage of total file size.
 
-set file_bytes  [file size $file_to_analyze]
-set file_pgcnt  [expr {$file_bytes/$pageSize}]
+### The following, setting $file_bytes based on the actual size of the file
+### on disk, causes this tool to choke on zipvfs databases. So set it based
+### on the return of [PRAGMA page_count] instead.
+if 0 {
+  set file_bytes  [file size $file_to_analyze]
+  set file_pgcnt  [expr {$file_bytes/$pageSize}]
+}
+set file_pgcnt  [db one {PRAGMA page_count}]
+set file_bytes  [expr {$file_pgcnt * $pageSize}]
 
 set av_pgcnt    [autovacuum_overhead $file_pgcnt $pageSize]
 set av_percent  [percent $av_pgcnt $file_pgcnt]
 
 set sql {SELECT sum(leaf_pages+int_pages+ovfl_pages) FROM space_used}
-set inuse_pgcnt   [expr int([mem eval $sql])]
+set inuse_pgcnt   [expr wide([mem eval $sql])]
 set inuse_percent [percent $inuse_pgcnt $file_pgcnt]
 
-set free_pgcnt    [expr $file_pgcnt-$inuse_pgcnt-$av_pgcnt]
+set free_pgcnt    [expr {$file_pgcnt-$inuse_pgcnt-$av_pgcnt}]
 set free_percent  [percent $free_pgcnt $file_pgcnt]
 set free_pgcnt2   [db one {PRAGMA freelist_count}]
 set free_percent2 [percent $free_pgcnt2 $file_pgcnt]
@@ -403,7 +501,13 @@ statline {Number of tables in the database} $ntable
 statline {Number of indices} $nindex
 statline {Number of named indices} $nmanindex
 statline {Automatically generated indices} $nautoindex
-statline {Size of the file in bytes} $file_bytes
+if {$isCompressed} {
+  statline {Size of uncompressed content in bytes} $file_bytes
+  set efficiency [percent $true_file_size $file_bytes]
+  statline {Size of compressed file on disk} $true_file_size $efficiency
+} else {
+  statline {Size of the file in bytes} $file_bytes
+}
 statline {Bytes of user payload stored} $user_payload $user_percent
 
 # Output table rankings
@@ -416,6 +520,24 @@ mem eval {SELECT tblname, count(*) AS cnt,
           FROM space_used GROUP BY tblname ORDER BY size+0 DESC, tblname} {} {
   statline [string toupper $tblname] $size [percent $size $file_pgcnt]
 }
+if {$isCompressed} {
+  puts ""
+  puts "*** Bytes of disk space used after compression ***********************"
+  puts ""
+  set csum 0
+  mem eval {SELECT tblname,
+                  int(sum(compressed_size)) +
+                         $compressOverhead*sum(int_pages+leaf_pages+ovfl_pages)
+                        AS csize
+          FROM space_used GROUP BY tblname ORDER BY csize+0 DESC, tblname} {} {
+    incr csum $csize
+    statline [string toupper $tblname] $csize [percent $csize $true_file_size]
+  }
+  set overhead [expr {$true_file_size - $csum}]
+  if {$overhead>0} {
+    statline {Header and free space} $overhead [percent $overhead $true_file_size]
+  }
+}
 
 # Output subreports
 #
@@ -452,11 +574,9 @@ Page size in bytes
 
 Number of pages in the whole file
 }
-puts \
-"    The number of $pageSize-byte pages that go into forming the complete
+puts "    The number of $pageSize-byte pages that go into forming the complete
     database"
-puts \
-{
+puts {
 Pages that store data
 
     The number of pages that store data, either as primary B*Tree pages or
diff --git a/tool/symbols-mingw.sh b/tool/symbols-mingw.sh
new file mode 100644
index 00000000..bf93eec7
--- /dev/null
+++ b/tool/symbols-mingw.sh
@@ -0,0 +1,33 @@
+#!/bin/sh
+#
+# Run this script in a directory that contains a valid SQLite makefile in
+# order to verify that unintentionally exported symbols.
+#
+make sqlite3.c
+
+echo '****** Exported symbols from a build including RTREE && FTS4 ******'
+gcc -c -DSQLITE_ENABLE_FTS3 -DSQLITE_ENABLE_RTREE \
+  -DSQLITE_ENABLE_MEMORY_MANAGEMENT -DSQLITE_ENABLE_STAT3 \
+  -DSQLITE_ENABLE_MEMSYS5 -DSQLITE_ENABLE_UNLOCK_NOTIFY \
+  -DSQLITE_ENABLE_COLUMN_METADATA -DSQLITE_ENABLE_ATOMIC_WRITE \
+  sqlite3.c
+nm sqlite3.o | grep " [TD] "
+
+echo '****** Surplus symbols from a build including RTREE & FTS4 ******'
+nm sqlite3.o | grep " [TD] " | grep -v " .*sqlite3_"
+
+echo '****** Dependencies of the core. No extensions. No OS interface *******'
+gcc -c -DSQLITE_ENABLE_MEMORY_MANAGEMENT -DSQLITE_ENABLE_STAT3 \
+  -DSQLITE_ENABLE_MEMSYS5 -DSQLITE_ENABLE_UNLOCK_NOTIFY \
+  -DSQLITE_ENABLE_COLUMN_METADATA -DSQLITE_ENABLE_ATOMIC_WRITE \
+  -DSQLITE_OS_OTHER -DSQLITE_THREADSAFE=0 \
+  sqlite3.c
+nm sqlite3.o | grep " U "
+
+echo '****** Dependencies including RTREE & FTS4 *******'
+gcc -c -DSQLITE_ENABLE_FTS3 -DSQLITE_ENABLE_RTREE \
+  -DSQLITE_ENABLE_MEMORY_MANAGEMENT -DSQLITE_ENABLE_STAT3 \
+  -DSQLITE_ENABLE_MEMSYS5 -DSQLITE_ENABLE_UNLOCK_NOTIFY \
+  -DSQLITE_ENABLE_COLUMN_METADATA -DSQLITE_ENABLE_ATOMIC_WRITE \
+  sqlite3.c
+nm sqlite3.o | grep " U "
diff --git a/tool/symbols.sh b/tool/symbols.sh
index 8aec0056..befffce5 100644
--- a/tool/symbols.sh
+++ b/tool/symbols.sh
@@ -7,18 +7,18 @@ make sqlite3.c
 
 echo '****** Exported symbols from a build including RTREE, FTS4 & ICU ******'
 gcc -c -DSQLITE_ENABLE_FTS3 -DSQLITE_ENABLE_RTREE \
-  -DSQLITE_ENABLE_MEMORY_MANAGEMENT -DSQLITE_ENABLE_STAT2 \
+  -DSQLITE_ENABLE_MEMORY_MANAGEMENT -DSQLITE_ENABLE_STAT3 \
   -DSQLITE_ENABLE_MEMSYS5 -DSQLITE_ENABLE_UNLOCK_NOTIFY \
   -DSQLITE_ENABLE_COLUMN_METADATA -DSQLITE_ENABLE_ATOMIC_WRITE \
   -DSQLITE_ENABLE_ICU \
   sqlite3.c
-nm sqlite3.o | grep ' T ' | sort -k 3
+nm sqlite3.o | grep ' [TD] ' | sort -k 3
 
 echo '****** Surplus symbols from a build including RTREE, FTS4 & ICU ******'
-nm sqlite3.o | grep ' T ' | grep -v ' sqlite3_'
+nm sqlite3.o | grep ' [TD] ' | grep -v ' .*sqlite3_'
 
 echo '****** Dependencies of the core. No extensions. No OS interface *******'
-gcc -c -DSQLITE_ENABLE_MEMORY_MANAGEMENT -DSQLITE_ENABLE_STAT2 \
+gcc -c -DSQLITE_ENABLE_MEMORY_MANAGEMENT -DSQLITE_ENABLE_STAT3 \
   -DSQLITE_ENABLE_MEMSYS5 -DSQLITE_ENABLE_UNLOCK_NOTIFY \
   -DSQLITE_ENABLE_COLUMN_METADATA -DSQLITE_ENABLE_ATOMIC_WRITE \
   -DSQLITE_OS_OTHER -DSQLITE_THREADSAFE=0 \
@@ -27,7 +27,7 @@ nm sqlite3.o | grep ' U ' | sort -k 3
 
 echo '****** Dependencies including RTREE & FTS4 *******'
 gcc -c -DSQLITE_ENABLE_FTS3 -DSQLITE_ENABLE_RTREE \
-  -DSQLITE_ENABLE_MEMORY_MANAGEMENT -DSQLITE_ENABLE_STAT2 \
+  -DSQLITE_ENABLE_MEMORY_MANAGEMENT -DSQLITE_ENABLE_STAT3 \
   -DSQLITE_ENABLE_MEMSYS5 -DSQLITE_ENABLE_UNLOCK_NOTIFY \
   -DSQLITE_ENABLE_COLUMN_METADATA -DSQLITE_ENABLE_ATOMIC_WRITE \
   sqlite3.c
diff --git a/tool/tostr.awk b/tool/tostr.awk
index 83c6cc1a..b4f48d3d 100644
--- a/tool/tostr.awk
+++ b/tool/tostr.awk
@@ -3,7 +3,6 @@
 # Convert input text into a C string
 #
 {
-  gsub(/\\/,"\\\\");
   gsub(/\"/,"\\\"");
   print "\"" $0 "\\n\"";
 }
diff --git a/tool/warnings-clang.sh b/tool/warnings-clang.sh
new file mode 100644
index 00000000..51084f31
--- /dev/null
+++ b/tool/warnings-clang.sh
@@ -0,0 +1,13 @@
+#/bin/sh
+#
+# Run this script in a directory with a working makefile to check for 
+# compiler warnings in SQLite.
+#
+rm -f sqlite3.c
+make sqlite3.c
+echo '************* FTS4 and RTREE ****************'
+scan-build gcc -c -DHAVE_STDINT_H -DSQLITE_ENABLE_FTS4 -DSQLITE_ENABLE_RTREE \
+      -DSQLITE_DEBUG sqlite3.c 2>&1 | grep -v 'ANALYZE:'
+echo '********** ENABLE_STAT3. THREADSAFE=0 *******'
+scan-build gcc -c -DSQLITE_ENABLE_STAT3 -DSQLITE_THREADSAFE=0 \
+      -DSQLITE_DEBUG sqlite3.c 2>&1 | grep -v 'ANALYZE:'
diff --git a/tool/warnings.sh b/tool/warnings.sh
index e1fa2b2d..78cfb55d 100644
--- a/tool/warnings.sh
+++ b/tool/warnings.sh
@@ -3,12 +3,17 @@
 # Run this script in a directory with a working makefile to check for 
 # compiler warnings in SQLite.
 #
-make sqlite3.c
+rm -f sqlite3.c
+make sqlite3.c-debug
 echo '********** No optimizations.  Includes FTS4 and RTREE *********'
 gcc -c -Wshadow -Wall -Wextra -pedantic-errors -Wno-long-long -std=c89 \
       -ansi -DHAVE_STDINT_H -DSQLITE_ENABLE_FTS4 -DSQLITE_ENABLE_RTREE \
       sqlite3.c
-echo '********** Optimized -O3.  Includes FTS4 and RTREE *********'
+echo '********** No optimizations. ENABLE_STAT3. THREADSAFE=0 *******'
+gcc -c -Wshadow -Wall -Wextra -pedantic-errors -Wno-long-long -std=c89 \
+      -ansi -DSQLITE_ENABLE_STAT3 -DSQLITE_THREADSAFE=0 \
+      sqlite3.c
+echo '********** Optimized -O3.  Includes FTS4 and RTREE ************'
 gcc -O3 -c -Wshadow -Wall -Wextra -pedantic-errors -Wno-long-long -std=c89 \
       -ansi -DHAVE_STDINT_H -DSQLITE_ENABLE_FTS4 -DSQLITE_ENABLE_RTREE \
       sqlite3.c