Aha! a partial fix! now everything works as expected. I just needed to create a link from libgmp.so.3 -> libgmp.so and now it all works! So the complete instructions for getting ghc working on a fedora 2 x86_64 system are ; yum install gmp.i386 readline.i386 ; ln -s /usr/lib/libgmp.so.3 /usr/lib/libgmp.so ; ln -s /usr/lib/sse2/libgmp.so.3 /usr/lib/sse2/libgmp.so ; rpm -U ghc-*.i386*.rpm -- downloaded from ghc web site and just always pass -optc-m32 -opta-m32 -optl-m32 to ghc and everything just works. If we can get ghc to pass those options automatically by 6.2.2 that would be cool and a very easy fix. Now I can get started on a native port. Hopefully, the much reduced register pressure on x86_64 and ability to take advantage of sse for floating point will speed things up for the RTS. John -- John Meacham - ⑆repetae.net⑆john⑈