>>>>> "G" == Geert Fannes <Geert.Fannes / ikanconsulting.com> writes: G> to generate the shared object file test.so. For some strange reason, G> this does not cause any problems on a 32 bit machine, I only found out G> about it when I tried to port everything to a x86_64 machine Normal, on 32 bit machine sizeof(int) == sizeof(unsigned long). This is not the case on x86_64 Guy Decoux