Thursday, December 22, 2005

How to compile SQLite for Windows

Here you will see how to compile SQLite for Windows with MinGW and without TCL. For bots.

How to install MINGW
  1. Download necessary files from http://sourceforge.net/project/showfiles.php?group_id=2435
    At the moment these are:
    MSYS-1.0.10.EXE
    MinGW-5.0.0.EXE
  2. Install MSYS ("minimal system" - some kind of unix emulator) to D:\MSYS (for example). If you see prompt to execute post install instructions you may say no, because you probably do not have MinGW or MSYS previously installed.
  3. Install MinGW (with GPP option necessary for SQLite) to D:\MSYS\mingw
    Installator didn't work with my proxy, so each file used by MinGW-5.0.0.EXE was downloaded separately and placed into installator's directory. Some downloaded files with newer versions than installer could understand were renamed to make it happy. List of packages required by MinGW-5.0.0.exe installer:
    binutils-2.15.91-20040904-1.tar.gz
    gcc-core-3.4.2-20040916-1.tar.gz
    mingw-runtime-3.9.tar.gz (renamed to mingw-runtime-3.8.tar.gz)
    w32api-3.5.tar.gz (renamed to w32api-3.3.tar.gz)
    gcc-g++-3.4.2-20040916-1.tar.gz (C++ preprocessor required by SQLite configure)
  4. After installer finished your environment is ready. Launch MSYS to start working. Home directory in this case ("cd ~") is located at D:\MSYS\home\yourusername if you need to find out where to place you files from windows to be found in MSYS.
  5. Optionally if you will need to run additional developer tools such as autoconf or automake, these are available through separate msysDTK-1.0.1.exe installer from the sourceforge download page above.
How to compile SQLite
  1. Download SQLite and upack it into subdirectory "sqlite" (for example) of your MSYS home directory (something like D:\MSYS\home\techtonik in my case)
  2. Launch MSYS
  3. cd sqlite
  4. mkdir bld; cd bld
  5. ../configure --disable-tcl
  6. This will create "tsrc" directory with all necessary files to compile SQLite
    make target_source
    cd tsrc
  7. Since there is no TCL libraries, tclsqlite.c should be removed to avoid errors during compilation (this is purely optional)
    mv tclsqlite.c tclsqlite.c.unused
  8. Compile sources with a some optimization (-O2 flag).
    gcc -O2 -DNDEBUG=1 -DTHREADSAFE=1 -c *.c
  9. Link compiled object (*.o) files to make sqlite3.exe (-s tell gcc to strip additional info used for debug)
    gcc -s -o sqlite3 *.o
  10. Remove shell.o object file used as entry point for command line utility. Useless for DLL.
    rm shell.o
  11. Link compiled object (*.o) files to make .dll The command below tells GCC to link all object files into one shared library (for windows it is .dll) and make functions listed in .def available for use to external programs (export). sqlite3.def file can be found in official sqlitedll-x_x_x.zip distribution
    gcc -shared -s -o sqlite3.dll *.o *.def
  12. There is one more thing you may need in future if you would like to compile other programs with SQLite support. It is import library. To make one for MinGW (called libsqlite3.dll.a) link .dll with command
    gcc -shared -s -o sqlite3.dll *.o *.def -Wl,--out-implib,libsqlite3.dll.a
  13. Wrap release.
    mkdir ../release
    cp sqlite3.dll sqlite3.exe libsqlite3.dll.a sqlite3.h ../release
    cd ../release
That's all. If you want reduce the size of .dll by several kbytes use strip --strip-unneeded command. By default strip will remove all symbols from file, but with this key it doesn't remove information needed for .dll relocation.

Ready to use files for SQLite 3.3.17 are available at http://rainforce.org/sqlite/