Trivial MPI-CUDA hybrid

trivial.c

#include <stdio.h>
#include <cuda.h>
#include <cuda_runtime.h>
int main (int argc, char *argv[])
{
        void *a_d;
        MPI_Init (&argc, &argv);
        cudaSetDevice(0);
        printf("hello\n");
        cudaError_t ierr = cudaMalloc( (void **) &a_d, 1000);
        if (ierr = cudaSuccess) cudaFree(a_d);
        MPI_Finalize();
        return 0;
}