Hi,

I want to use gdb to step into the code to see what's going on inside the code, for example my code as below, I set a break at the line MPI_Get_processor_name (processor_name, &namelen), I want to step into MPI_Get_processor_name, I configure with --enable-g=all and --enable-fast=O0, but gdb cann't step into MPI_Get_processor_name, it steps into fprintf, what should I do?

#include "mpi.h"

#include <stdio.h>

int main (int argc, char **argv)

{

int myid, numprocs;

int namelen;

char processor_name[MPI_MAX_PROCESSOR_NAME];

MPI_Init (&argc, &argv);

MPI_Comm_rank (MPI_COMM_WORLD, &myid);

MPI_Comm_size (MPI_COMM_WORLD, &numprocs);

MPI_Get_processor_name (processor_name, &namelen);

fprintf (stderr, "Hello World! Process %d of %d on %s\n", myid, numprocs, processor_name);

MPI_Finalize ();

return 0;

}