I was thinking that we should consider fixing some issues with the current Foreign library before haskell' when it comes to support for 64-bit (and non 32-bit in general) architectures. the specific changes I am thinking of are mandate IntPtr,WordPtr,IntMax,and WordMax as defined by the C99 types intptr_t, uintptr_t, intmax_t, and uintmax_t. (these are all supported by jhc and ghc right now) change the following type signatures bitSize :: Bits a => a -> Maybe Int (to handle Integer and similar types properly) plusPtr :: Ptr a -> IntPtr -> Ptr a minusPtr :: Ptr a -> Ptr b -> IntPtr add the following ptrToIntPtr :: Ptr a -> IntPtr intPtrToPtr :: IntPtr -> Ptr a ptrToWordPtr :: Ptr a -> WordPtr wordPtrToPtr :: WordPtr -> Ptr a Also, we should make sure whatever new IO interface for files we come up with is 64 bit safe when it comes to offsets inside of files. Int64,IntMax, or some new Offset type are all candidates. John -- John Meacham - ⑆repetae.net⑆john⑈