[sql] Rewrite sqlite patching "system".

third_party/sqlite/src/Makefile.linux-gcc

 #!/usr/make
 #
 # Makefile for SQLITE
 #
 # This is a template makefile for SQLite.  Most people prefer to
 # use the autoconf generated "configure" script to generate the
 # makefile automatically.  But that does not work for everybody
 # and in every situation.  If you are having problems with the
 # "configure" script, you might want to try this makefile as an
 # alternative.  Create a copy of this file, edit the parameters
@@ skipping 14 matching lines @@
 #### If the target operating system supports the "usleep()" system
 #    call, then define the HAVE_USLEEP macro for all C modules.
 #
 #USLEEP = 
 USLEEP = -DHAVE_USLEEP=1
 
 #### If you want the SQLite library to be safe for use within a 
 #    multi-threaded program, then define the following macro
 #    appropriately:
 #
-#THREADSAFE = -DTHREADSAFE=1
 THREADSAFE = -DTHREADSAFE=1
+#THREADSAFE = -DTHREADSAFE=0
 
 #### Specify any extra linker options needed to make the library
 #    thread safe
 #
-#THREADLIB = -lpthread
 THREADLIB = -lpthread
+#THREADLIB = 
 
 #### Specify any extra libraries needed to access required functions.
 #
 #TLIBS = -lrt    # fdatasync on Solaris 8
-TLIBS = 
+ifeq ($(shell uname -s),Darwin)
+TLIBS = -framework CoreServices
+else
+TLIBS = -ldl
+endif
 
 #### Leave SQLITE_DEBUG undefined for maximum speed.  Use SQLITE_DEBUG=1
 #    to check for memory leaks.  Use SQLITE_DEBUG=2 to print a log of all
 #    malloc()s and free()s in order to track down memory leaks.
 #    
 #    SQLite uses some expensive assert() statements in the inner loop.
 #    You can make the library go almost twice as fast if you compile
 #    with -DNDEBUG=1
 #
 #OPTS = -DSQLITE_DEBUG=2
 #OPTS = -DSQLITE_DEBUG=1
 #OPTS = 
+OPTS = -DNDEBUG=1
+#OPTS += -DHAVE_FDATASYNC=1
 
-# These flags match those for SQLITE_CFLAGS in config.mk.  
+# These flags match those for SQLITE_CFLAGS in config.mk.
 
-OPTS += -DNDEBUG
 OPTS += -DSQLITE_CORE
 OPTS += -DSQLITE_ENABLE_FTS2 -DSQLITE_ENABLE_BROKEN_FTS2
 OPTS += -DSQLITE_DEFAULT_FILE_PERMISSIONS=0600
 OPTS += -DHAVE_USLEEP=1
 
 # Additional SQLite tests.
 OPTS += -DSQLITE_MEMDEBUG=1
 
 # Don't include these ones, they break the SQLite tests.
 #  -DSQLITE_OMIT_ATTACH=1 \
 #  -DSQLITE_OMIT_LOAD_EXTENSION=1 \
 #  -DSQLITE_OMIT_VACUUM=1 \
 #  -DSQLITE_TRANSACTION_DEFAULT_IMMEDIATE=1 \
 
-SHELL_ICU = $(TOP)/src/shell_icu_linux.c -licuuc
-
 # TODO(shess) I can't see why I need this setting.
 OPTS += -DOS_UNIX=1
 
+# The recover virtual table is not generally enabled.  Enable it for testing
+# purposes.
+OPTS += -DDEFAULT_ENABLE_RECOVER=1
+
+# Support for loading Chromium ICU data in sqlite3.
+ifeq ($(shell uname -s),Darwin)
+SHELL_ICU =
+else
+SHELL_ICU = $(TOP)/src/shell_icu_linux.c -licuuc
+endif
+
 #### The suffix to add to executable files.  ".exe" for windows.
 #    Nothing for unix.
 #
 #EXE = .exe
 EXE =
 
 #### C Compile and options for use in building executables that 
 #    will run on the target platform.  This is usually the same
 #    as BCC, unless you are cross-compiling.
 #
-TCC = gcc -O6
+TCC = gcc -Os

[Scott Hess - ex-Googler, 2015/01/27 22:09:37]

On OSX gcc is a clang wrapper and -O6 no longer works.  IMHO not
necessary/appropriate anyhow.

 #TCC = gcc -g -O0 -Wall
 #TCC = gcc -g -O0 -Wall -fprofile-arcs -ftest-coverage
 #TCC = /opt/mingw/bin/i386-mingw32-gcc -O6
 #TCC = /opt/ansic/bin/c89 -O +z -Wl,-a,archive
 
 #### Tools used to build a static library.
 #
 AR = ar cr
 #AR = /opt/mingw/bin/i386-mingw32-ar cr
 RANLIB = ranlib
@@ skipping 35 matching lines @@
 #LIBREADLINE = -static -lreadline -ltermcap
 
 #### Which "awk" program provides nawk compatibilty
 #
 # NAWK = nawk
 NAWK = awk
 
 # You should not have to change anything below this line
 ###############################################################################
 include $(TOP)/main.mk