Hi Folks, I've just updated the Building Guide to include a section on porting GHC to a new platform. Please take a look: http://www.haskell.org/ghc/docs/latest/building/sec-porting-ghc.html Disclaimer: I haven't actually followed the steps in doing an unregisterised bootstrap from beginning to end, so there's sure to be some inaccuracies in there. Cheers, Simon