Cross-ocaml is a set of patch and Makefile that can build an OCaml cross-compiler. This branch will build a mingw32 cross compiler. You may navigate through the branches to see the available cross-compilers You can build cross-compilers that creates native binary for windows, both 32 and 64 bits. By native, we mean that the binary are compliant with the original windows API/ABI, and do not use a POSIX emulation such as cygwin. This also means that the compiler may not support some unix-specific features, in particular in the domain of threads management. The compiler supports, in fact, exactly the features supported by the native OCaml compiler for Windows. To build the windows 32 bits compiler, just type: make To build the windows 64 bits compiler, just type: make MINGW_HOST=x86_64-w64-mingw32 By default, all binaries are placed into the binary/ folder. They wil not be functional unless you install them all in your system root though. You can do that by typing, as root: # make install If you are not already familiar with mingw64, i686-w64-mingw32 refers to 32 bits windows cross-compiling tools and x86_64-w64 to 64 bits windows cross-compiling tools. In the following, we use i686-w64-mingw32 but all instructions apply to x86_64-w64 as well. The compiler also includes a support for ocamlfind. In order to use it, you should set the environment variable OCAMLFIND_CONF to /etc/i686-w64-mingw32-ocamlfind.conf: export OCAMLFIND_CONF=/etc/i686-w64-mingw32-ocamlfind.conf When the build system uses the autoconf tool, you can build the C libraries with the following options: ./configure --prefix=/usr/i686-w64-mingw32 --host=i686-w64-mingw32 It is convenient to install those libs directly in /usr/i686-w64-mingw32. Additionally, if your configuration script uses pkg-config to detect libraries, you may want to set the PKG_CONFIG_PATH variable to /usr/i686-w64-mingw32/lib/pkgconfig: export PKG_CONFIG_PATH=/usr/i686-w64-mingw32/lib/pkgconfig This project is not in any way supported by the OCaml original maintainers. Please report any issue with this package there: https://github.com/savonet/mingw-ocaml -- Romain Beauxis <toots@rastageeks.org> Sat Mar 23 07:07:20 CDT 2013