The new 2.49.60 release should probably fix a couple of bugs: * https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=385490 If clisp uses libffcall-1.13 and enables the FFI on all platforms, this should be fixed. * https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=478000 Try with --enable-portability. Bruno