Hi, I see that cabal allows me to say: c-sources: (...) and then have a few C files built with my program. I see that I can have lines like #include <some usual C header> in those files, and that makes me think that, even if I add no C files to my .cabal, I still can count on what would be standard C functions available, and that I could use them with Foreign, like, say: foreign import ccall "memcpy" :: Ptr a -> Ptr a -> CSize -> IO Ptr a Am I right to guess that? If so, what would be the available set of functions? I imagined standard C (C99?), but searching around I see that there are a few different stabdard C libraries, like, for instance, glibc, which seems to be used in Linux, and a few others. Supposed I wanted to write a module with all C functions always available, what could I let be there? Thanks, Maurício