I'm interested in doing a port of GHC to OS/2.

Any particular documentation I should be reading before I even think about embarking on such a crazy endevour?

GHC's Building Guide is a good place to start: http://www.haskell.org/ghc/docs/latest/building/building-guide.html Although note that bootstrapping on a new platform using the 5.xx series is a little difficult due to the way we preprocess some of the library sources using hsc2hs (although it has been done by at least one brave soul). You might want to start from 4.08.2 using .hc files and bootstrap up to 5.02 from there. 4.08.2 is the oldest version we support building the current sources with. We'll be here to provide guidance and moral support, as usual... Cheers, Simon