CURAND Library - Compiling Error - Undefined reference to functions
Domanda
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!
Soluzione
@Wilo Maldonado: just use a linker flag -lcurand and additionally -L/path/to/cuda/libs if you do not have it already
Altri suggerimenti
The problem is not the header file, otherwise you would have got a compile error. You have a linker error. You will need to tell your linker where to find the object or library file that contains those functions.
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