opam-windows-repository

OCaml cross-compilers for Windows: packages description for OPAM

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• Prerequisites:

  • C cross-compiler: i686-w64-mingw32-gcc and/or x86_64-w64-mingw32-gcc

• How to install:
  $ opam switch 4.00.1
$ opam repo add win https://github.com/vouillon/opam-windows-repository.git
$ opam install win32-ocaml win64-ocaml win64-lablgtk win64-ssl [...]

• Example of use:
  $ x86_64-w64-mingw32-ocamlopt hello.ml -o hello.exe
$ x86_64-w64-mingw32-ocamlopt -I +../lablgtk2 lablgtk.cmxa gtkInit.cmx filesel.ml -o filesel.exe

• How to search (currently supported) packages for Windows:
  $ opam search win32
$ opam search win64

• Important files:

  • OCaml virtual machines for Windows (bytecode mode):
    • ~/.opam/4.00.1/{i686,x86_64}-w64-mingw32/bin/ocamlrun.exe
  • Gtk dlls needed at execution time:
    • ~/.opam/4.00.1/{i686,x86_64}-w64-mingw32/lib/gtk/bin/*.dll

• Issues:

  • To cross-compile i686 opam packages on x86_64 machines, need the glibc.i686 system package
  • On old fedora versions (< 17), the C cross-compiler for i686 was named i686-pc-mingw32-gcc and not i686-w64-mingw32-gcc. Please run some ln -sf commands to fix it before installing ocaml cross-compilers