Hi! I start to "hack" GHC, and, I 've tried to build it, but the build return this error message : configure: GMP_CHECK_ASM_W32: fatal: do not know how to define a 32-bit word make[1]: *** [boot] Error 1 I've tried to build GHC using mSYS and MinGW under MS windows xp... Does anyone have any idea of how can I solve this problem? Thanks Rodrigo Geraldo Ribeiro PS: Sorry for my english...