I have a variety of C interfaces which are generated with hsc2hs, in particular a ncurses and openssl wrapper. they work perfectly when compiling normally, but when i use the -O or -O2 option, I end up with at the least a ton of C warnings on the /tmp/ghc*.hc file and in some cases a fatal error. as far as i can tell they relate to some odd interaction with the C preprocessor and the generated haskell code. I am not compiling with -fvia-C but it appears to be going via C anyway. Does anyone have any ideas why this might be the case or a workaround for the problem? Perhaps if this is the case, I can force it to not compile via C even when optimizing? John (the offending code is part of 'ginsu' my gale client implemented in haskell http://repetae.net/john/computer/ginsu/ ) -- --------------------------------------------------------------------------- John Meacham - California Institute of Technology, Alum. - john@foo.net ---------------------------------------------------------------------------