#include "mpi.h"
#include <stdio.h>

int main( int argc, char *argv[] )
{
    int provided, isMainThread, claimed;

    // MPI_Init_thread( 0, 0, MPI_THREAD_MULTIPLE, &provided );
    // MPI_Init_thread( 0, 0, MPI_THREAD_SINGLE, &provided );
    MPI_Init(&argc, &argv);

    printf("Perform endless Recv ...\n");
    fflush(stdout);

    int        recvNum;
    MPI_Status status;
    MPI_Recv(&recvNum, 1, MPI_INT, MPI_ANY_SOURCE, MPI_ANY_TAG, MPI_COMM_WORLD, &status);

    MPI_Finalize();

    return 0;
}