cufft LNK2019 error

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1

Hello all,

I am running a very basic cufft program (from Nvidia website) just to get to grips with it…

#include "cuda_runtime.h"
#include "device_launch_parameters.h"
#include <cufft.h>
#include <stdio.h>

int main()
{
#define NX 256
#define BATCH 10
	cufftHandle plan;
	cufftComplex *data;
	cudaMalloc((void**)&data, sizeof(cufftComplex)*(NX / 2 + 1)*BATCH);
	/* Create a 1D FFT plan. */
	cufftPlan1d(&plan, NX, CUFFT_R2C, BATCH);
	/* Use the CUFFT plan to transform the signal in place. */
	cufftExecR2C(plan, (cufftReal*)data, data);
	/* Destroy the CUFFT plan. */
	cufftDestroy(plan);
	cudaFree(data);
	return 0;
}

I have added the “cufft.lib” to additional libraries in the linker, added the directory and changed the architecture to x64. However, i still get…

Error 1 error LNK2019: unresolved external symbol cufftPlan1d referenced in function main
Error 2 error LNK2019: unresolved external symbol cufftExecR2C referenced in function main
Error 3 error LNK2019: unresolved external symbol cufftDestroy referenced in function main
Error 4 error LNK1120: 3 unresolved externals

How can I fix this?

Thanks

2

hese are link errors not compilation errors, so they have nothing to do with cufft.h.

what you are probably missing is the cufft.lib in your linker input. (in VS: Project Properties->Linker->Input->Additional Dependencies)

1 Like
3

I got similar problems today. I would suggest to copy the folder “simpleCUFFT” from the directory:

C:\ProgramData\NVIDIA Corporation\CUDA Samples\v7.5\7_CUDALibraries\simpleCUFFT
(Your directory may be different)

to your target location and then change it to your needs.

In VS2013 → Project → Properties → VC++ Directories → Include Directories

Add:

C:\ProgramData\NVIDIA Corporation\CUDA Samples\v7.5\common\inc
(Your directory may be different)

In VS2013 → Project → Properties → CUDA C/C++ → Common → Additional Include Directories

Add:

./;C:\ProgramData\NVIDIA Corporation\CUDA Samples\v7.5\common\inc
(Your directory may be different)

This worked for me