初学者CUDA程序中未解析的外部符号

Question

我创建一个新的Win32控制台应用程序作为一个空项目我使用Visual Studio 2008 C++运行Windows 7 64位.我试图从本文底部获取示例代码来构建:http://www.ddj.com/architect/207200659

我将CUDA Build Rule v2.3.0添加到项目的自定义构建规则中.这是唯一一个在可用规则文件列表中有一个复选框的东西

我在源文件(文件夹/过滤器???)中创建moveArrays.cu

在该文件中,我添加以下代码:

// moveArrays.cu
//
// demonstrates CUDA interface to data allocation on device (GPU)
// and data movement between host (CPU) and device.

#include <stdio.h>
#include <assert.h>
#include <cuda.h>
int main(void)
{
   float *a_h, *b_h;     // pointers to host memory
   float *a_d, *b_d;     // pointers to device memory
   int N = 14;
   int i;
   // allocate arrays on host
   a_h = (float *)malloc(sizeof(float)*N);
   b_h = (float *)malloc(sizeof(float)*N);
   // allocate arrays on device
   cudaMalloc((void **) &a_d, sizeof(float)*N);
   cudaMalloc((void **) &b_d, sizeof(float)*N);
   // initialize host data
   for (i=0; i<N; i++) {
      a_h[i] = 10.f+i;
      b_h[i] = 0.f;
   }
   // send data from host to device: a_h to a_d 
   cudaMemcpy(a_d, a_h, sizeof(float)*N, cudaMemcpyHostToDevice);
   // copy data within device: a_d to b_d
   cudaMemcpy(b_d, a_d, sizeof(float)*N, cudaMemcpyDeviceToDevice);
   // retrieve data from device: b_d to b_h
   cudaMemcpy(b_h, b_d, sizeof(float)*N, cudaMemcpyDeviceToHost);
   // check result
   for (i=0; i<N; i++)
      assert(a_h[i] == b_h[i]);
   // cleanup
   free(a_h); free(b_h); 
   cudaFree(a_d); cudaFree(b_d);
}

当我构建时,我得到这些错误:

1>------ Build started: Project: CUDASandbox, Configuration: Debug x64 ------
1>Linking...
1>moveArrays.cu.obj : error LNK2019: unresolved external symbol cudaFree referenced in function main
1>moveArrays.cu.obj : error LNK2019: unresolved external symbol cudaMemcpy referenced in function main
1>moveArrays.cu.obj : error LNK2019: unresolved external symbol cudaMalloc referenced in function main
1>moveArrays.cu.obj : error LNK2019: unresolved external symbol __cudaUnregisterFatBinary referenced in function __cudaUnregisterBinaryUtil
1>moveArrays.cu.obj : error LNK2019: unresolved external symbol __cudaRegisterFatBinary referenced in function __sti____cudaRegisterAll_45_tmpxft_00001264_00000000_6_moveArrays_cpp1_ii_main
1>D:\Stuff\Programming\Visual Studio 2008\Projects\CUDASandbox\x64\Debug\CUDASandbox.exe : fatal error LNK1120: 5 unresolved externals
1>Build log was saved at "file://d:\Stuff\Programming\Visual Studio 2008\Projects\CUDASandbox\CUDASandbox\x64\Debug\BuildLog.htm"
1>CUDASandbox - 6 error(s), 0 warning(s)
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

我可以编译并运行SDK附带的示例CUDA程序.我知道我在这里错过了一些简单的东西,但它是什么？

Answer 1

我想你错过了链接到正确的库.确保在"Configuration Properties-> Linker-> Input"下添加了CUDA库.请参阅此.

Answer 2

需要做两件事:

1. 添加CUDA路径:
   Go:"Configuration Properties-> Linker-> General-> Additional Libary Directories"并添加$(CudaToolkitLibDir)到列表中.

2. 添加CUDA运行时库:
   转到:"解决方案属性 - >链接器 - >输入 - >附加依赖关系"并添加cudart.lib到列表中.