CUFFT linking error

Accelerated Computing CUDA CUDA Programming and Performance
1

Hi,

I’m trying to excecute the code below.
Compiling works but execution returns a linking error.

I got the following error message:

1>sample.obj : error LNK2019: unresolved referece to external symbol _cufftPlan1d@16 non risolto in fucntion _main
1>C:\Documents and Settings\pc\Documenti\Visual Studio 2005\Projects\FFT\Debug\FFT.exe : fatal error LNK1120: 1 external link unresolved

CUDA CODE
#include <stdio.h>
#include <stdlib.h>
#include <cuda_runtime.h>
#include <cutil.h>
#include <cuda.h>
#include <cufft.h>
#define NX 256
#define BATCH 1

int main(int argc, char** argv){
CUT_DEVICE_INIT(argc,argv);
const int N=20;
float* h_a, * h_t ,d_a;
//Allocation on host
h_a=new float[N];
h_t=new float[2N];
//Data input
for (int i=0;i<N;i++){
h_a[i]=1;
}
size_t size=Nsizeof(float);
//Allocation on device
cudaMalloc((void**)& d_a, size);
cudaMemcpy(d_a, h_a, size, cudaMemcpyHostToDevice);
cufftHandle plan;
cufftComplex data;
cudaMalloc((void*)&data, sizeof(cufftComplex)(NX/2+1)*BATCH);
// Create a 1D FFT plan.
cufftPlan1d(&plan, NX, CUFFT_R2C, BATCH);
return 0;
}

Does anybody know what is the issue?

Thanks.

2

you must add to link a cufft.lib

3

I’m sorry, but i don’t manage to add to link a cufft.lib.
Could anybody tell me how to do it?

4

click right button on your project name. Then click on properties. Then configuration properties, linker, input. In additional dependencies you must write cufft.lib and OK.

5

Thanks for your help! I have solved my problem.

6

Hi, i’ve the same problems but i have not solved with this procedure.
in first time i’ve got the following messages:

error LNK2019: unresolved referece to external symbol _cufftPlan1d@16 referenced in fucntion _main
error LNK2019: unresolved referece to external symbol _cufftExecC2C@16 referenced in fucntion _main
error LNK2019: unresolved referece to external symbol _cufftDestroy@4 referenced in fucntion _main
error LNK1120: 3 unresolved externals

after i set the following configuration properties:

Project-> Properties-> Configuration Properties->Linker->Input->Additional Dependencies and i’ve written “cufft.lib”.

after i’ve got the second error message:

error LNK1104: cannot open file 'cufft.lib'

so i set the following:

Project->Properties->Configuration Properties->VC++ Directories->Library Directories and i added "C:\Program files\NVIDIA GPU Computing Toolkit\CUDA\v7.0\lib\x64

i rebuilded the source cod but now i’ve again the first error

Please help me!
Best regards