pengyu wrote:

Dear Roberto:

Thank you for your help. I'm sorry it isn't the PLL problem.(I use gmp only) I test the gmp 4.1 in GCC 3.2(OS is Red Hat 8.0), the problem has disappeared. I think the problem is caused by the older version of GCC. In GMP manual, it commend us use GCC 2.9 if we want to use C++ interface supported by GMP. But when I use GCC 2.96, it still has the problem.

I believe the problem may be caused by the fact that different versions of g++ are not compatible with eachother. So you must make sure you compile both GMP and your own test program with the same version of the compiler. All the best

Roberto