> The C stub #includes HsFFI.h, which GHC provides, but Hugs doesn't. > What should I use? Hugs ffi support currently lags a long way behind the ffi specification (or implements something else entirely depending on your point of view). At the moment, Hugs' ffi doesn't work with GreenCard and isn't compatible with GHC and NHC. I'm trying to update Hugs' ffi implementation in my spare time. A