Hi, I now can build ffihugs, and have added some patches so it finds visual studio etc. I'm currently have ffihugs do something "unexpected" - but I'm not sure what the real behaviour is... -- test.hs import Foreign import System.Environment main = print $ c_test 1 2 foreign import ccall unsafe "test.h test" c_test :: Int -> Int -> Int -- test.c int test(int a, int b){return 42;} -- test.h int test(int a, int b); Then I run (as per http://cvs.haskell.org/Hugs/pages/users_guide/ffihugs.html): ffihugs test.hs test.c And before compiling hugs has clobbered test.c, and removed my code from it. This gives a link error, since test is undefined. Is this how ffihugs is supposed to work? Should my code be going somewhere else? Thanks Neil