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#define MPICH_SKIP_MPICXX 1
#define OMPI_SKIP_MPICXX 1
#include <mpi.h>
#include <stdio.h>
#ifdef __cplusplus
extern "C" {
#endif
extern void sayhello(MPI_Comm);
#ifdef __cplusplus
}
#endif
void sayhello(MPI_Comm comm) {
int size, rank;
char pname[MPI_MAX_PROCESSOR_NAME]; int len;
if (comm == MPI_COMM_NULL) {
printf("You passed MPI_COMM_NULL !!!\n");
return;
}
MPI_Comm_size(comm, &size);
MPI_Comm_rank(comm, &rank);
MPI_Get_processor_name(pname, &len);
pname[len] = 0;
printf("Hello, World! I am process %d of %d on %s.\n",
rank, size, pname);
}
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