CURAND Library - Compiling Error - Undefined reference to functions

Question

I have the following code which I am trying to compile using nvcc.

Code:

#include <stdio.h>
#include <stdlib.h>
#include <cuda.h>
#include <curand.h>

int main(void)
{
    size_t n = 100;
    size_t i;
    int *hostData;
    unsigned int *devData;
    hostData = (int *)calloc(n, sizeof(int));
    curandGenerator_t gen;
    curandCreateGenerator(&gen, CURAND_RNG_PSEUDO_MRG32K3A);
    curandSetPseudoRandomGeneratorSeed(gen, 12345);
    cudaMalloc((void **)&devData, n * sizeof(int));
    curandGenerate(gen, devData, n);
    cudaMemcpy(hostData, devData, n * sizeof(int), cudaMemcpyDeviceToHost);
    for(i = 0; i < n; i++)
    {
        printf("%d ", hostData[i]);
    }
    printf("\n");
    curandDestroyGenerator (gen);
    cudaFree ( devData );
    free ( hostData );
    return 0;
}

This is the output I receive:

$ nvcc -o RNG7 RNG7.cu
/tmp/tmpxft_00005da4_00000000-13_RNG7.o: In function `main':
tmpxft_00005da4_00000000-1_RNG7.cudafe1.cpp:(.text+0x6c): undefined reference to `curandCreateGenerator'
tmpxft_00005da4_00000000-1_RNG7.cudafe1.cpp:(.text+0x7a): undefined reference to `curandSetPseudoRandomGeneratorSeed'
tmpxft_00005da4_00000000-1_RNG7.cudafe1.cpp:(.text+0xa0): undefined reference to `curandGenerate'
tmpxft_00005da4_00000000-1_RNG7.cudafe1.cpp:(.text+0x107): undefined reference to `curandDestroyGenerator'
collect2: ld returned 1 exit status

My initial guess is that for some reason the CURAND Library is not properly installed or that it cannot find the curand.h header file.

Please let me know what I should look for or how to solve my problem.

Thanks!

Answer 1

@Wilo Maldonado: just use a linker flag -lcurand and additionally -L/path/to/cuda/libs if you do not have it already