Patrick Pelissier <Patrick.Pelissier at loria.fr> writes: I don't know if you are very interrested, but just in case: GCC 1.42 doesn't define __builtin_constant_p, which makes some code in gmp.h to fail. It seems you need to have __GNUC__ >= 2. When did it appear, with gcc 2.0? -- Torbjörn