GHC under Wine
GHC runs flawlessly under Wine. Here's a guide on how to get it working.
First, get the latest stable version of Wine from your distribution's repository, or from http://www.winehq.com/site/download. For Mac users, WineBottler works well.
Once this is all done, you should be good to start using GHC.
Create a simple haskell program to compile. Hello World examples are good. Try compiling it:
$ WINEDEBUG=-all wine ghc --make hello.hs [1 of 1] Compiling Main ( hello.hs, hello.o ) Linking ...
$ wine hello Hello, world!
If it all works well then you should be able to compile your Haskell programs for windows with GHC on Wine.
If you encounter specific, reproducible issues that are present in the latest release of wine you should file a bug report with the Wine project http://bugs.winehq.org (so long as one doesn't already exist for the issue)
3 Known problems
- MSYS does not integrate with MinGW correctly - See Wine bug 15949
- removeDirectoryRecursive did not work correctly prior to wine-1.1.4-538-g2e8dec4. This most notably broke cabal install. Use Wine 1.1.5 or newer.
- GHC 6.12.3, Wine 1.2 (from WineBottler) on mac osx leopard: GHC's mingw/bin/gcc.exe exits with a "spawnv failed: errno 2: No such file or directory" error, which breaks cabal install. To work around, replace gcc.exe with a renamed copy of g++.exe, also in that directory ("ghc\bin\mingw> copy g++.exe gcc.exe").
- ghci appears to not work at all on Wine-1.4/Linux-x86, but works OK on Wine-1.7.18/i386, HP 2014.2.0.0 and Ubuntu 12.04.5/x86_64.
3.1 Native DLLs
Wine isn't perfect (yet) but does offer a solution for using native dlls, as an alternative to builtin dlls if certain functions are not implemented or are buggy and not yet fixed. To configure this use winecfg where you can specify settings for the ordering of preferences for loading dlls, Builtin only, Native only, Builtin then Native and Native then Builtin.
winetricks can be useful for installing common native dlls or software
3.2 Code that uses gtk2hs
First, install GTK from http://www.gtk.org/download/win32.php, according to the instructions from http://www.haskell.org/haskellwiki/Gtk2Hs/Installation#Windows. For compilation of gtk, sometimes (e.g., on Ubuntu 12.04.5/x86_64 with Wine-1.7.18/i386, HP 2014.2.0.0, gtk2hs 0.13 and http://ftp.gnome.org/pub/gnome/binaries/win32/gtk+/2.24/gtk+-bundle_2.24.10-20120208_win32.zip) one needs to use the flag -f-fmode-binary, as described at the following ticket.
3.3 Code that uses Template Haskell
If the code uses TH together with some external DLLs (e.g., gtk), it may have trouble finding library files, e.g., as reported at #9553. If so, a workaround similar to the one described in the ticket may help sidestep the problem for now.
You can enable tracing of various components within Wine to aid in debugging issues with Wine by using Wine Debug Channels.