Libffi errors while cross-compiling GHC 7.6.2 (Stage 1)

I'd like to cross-build GHC 7.6.2. I got stuck when I was trying to build a Stage 1 compiler [1]. Here's a bug report: [2,3]. I'm not sure that it's a bug; maybe I misunderstood the process. Could anyone advise? I have no experience with C. Though, I'll try to help out. [1] http://hackage.haskell.org/trac/ghc/wiki/CrossCompilation [2] http://www.haskell.org/pipermail/ghc-tickets/2013-February/001240.html [3] http://hackage.haskell.org/trac/ghc/ticket/7717