Greetings, I should have mentioned this before, but I wanted to check it out further... when I build hugs (either from cvs or from tarball) on cygwin, the build fails with: ERROR "Text.Regex.Posix" - Unable to open file "Text.Regex.Posix" make: *** [../hugsdir/libraries/Text/Regex/Posix.so] Error 1 If I remove EXTRA_FFI_LIBRARIES by hadn from the make file, it builds. --- Also, alignPtr and sizeOf 1.0::CDouble are fixed in cvs, thanks! I have a tiny test program that tests the ffi by passing a pointer to a structure around and accesses it from Haskell. I wonder if I could/should make this into one of the 'tests' in hugs98/tests/ffi ?? Cheers, Ron