初学者 CUDA 程序中未解析的外部符号-C/C++问题

Unresolved external symbols in beginners CUDA program(初学者 CUDA 程序中未解析的外部符号)

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问题描述

我创建了一个新的 Win32 控制台应用程序作为一个空项目我正在使用 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.它是可用规则文件列表中唯一带有复选框的东西

我在源文件(文件夹/过滤器???)中创建了 moveArrays.cu

在该文件中，我添加以下代码:

//moveArrays.cu////演示 CUDA 接口到设备(GPU)上的数据分配//以及主机(CPU)和设备之间的数据移动.#include #include #include int main(void){浮动*a_h，*b_h；//指向主机内存的指针浮动 *a_d, *b_d;//指向设备内存的指针整数 N = 14;国际我;//在主机上分配数组a_h = (float *)malloc(sizeof(float)*N);b_h = (float *)malloc(sizeof(float)*N);//在设备上分配数组cudaMalloc((void **) &a_d, sizeof(float)*N);cudaMalloc((void **) &b_d, sizeof(float)*N);//初始化主机数据对于 (i=0; i构建时出现以下错误:
<前>1>------ 构建开始:项目:CUDASandbox，配置:调试 x64 ------1>链接...1>moveArrays.cu.obj : error LNK2019: 函数 main 中引用了未解析的外部符号 cudaFree1>moveArrays.cu.obj : error LNK2019: 函数 main 中引用了未解析的外部符号 cudaMemcpy1>moveArrays.cu.obj : error LNK2019: 函数 main 中引用了未解析的外部符号 cudaMalloc1>moveArrays.cu.obj:错误 LNK2019:未解析的外部符号 __cudaUnregisterFatBinary 在函数 __cudaUnregisterBinaryUtil 中引用1>moveArrays.cu.obj:错误 LNK2019:未解析的外部符号 __cudaRegisterFatBinary 在函数 __sti____cudaRegisterAll_45_tmpxft_00001264_00000000_6_moveArrays_cpp1_ii_main 中引用1>D:StuffProgrammingVisual Studio 2008ProjectsCUDASandboxx64DebugCUDASandbox.exe:致命错误 LNK1120:5 个未解析的外部1>构建日志保存在file://d:StuffProgrammingVisual Studio 2008ProjectsCUDASandboxCUDASandboxx64DebugBuildLog.htm"1>CUDASandbox - 6 个错误，0 个警告========== 构建:0 成功，1 失败，0 最新，0 跳过 ==========

我可以编译和运行 SDK 附带的示例 CUDA 程序.我知道我在这里遗漏了一些简单的东西，但它是什么?

解决方案

我猜你没有链接到正确的库.确保在配置属性->链接器->输入"下添加了 CUDA 库.请参阅此.

I create a new Win32 Console App as an empty project I am running Windows 7 64bit with Visual Studio 2008 C++. I am trying to get the sample code from the bottom of this article to build: http://www.ddj.com/architect/207200659



I add CUDA Build Rule v2.3.0 to the project's custom build rules.  It is the only thing with a checkbox in the available rule files list

I create moveArrays.cu in the Source Files (folder/filter???)

In that file I add the following code:
// 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);
}
When I build I get these errors:
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:StuffProgrammingVisual Studio 2008ProjectsCUDASandboxx64DebugCUDASandbox.exe : fatal error LNK1120: 5 unresolved externals
1>Build log was saved at "file://d:StuffProgrammingVisual Studio 2008ProjectsCUDASandboxCUDASandboxx64DebugBuildLog.htm"
1>CUDASandbox - 6 error(s), 0 warning(s)
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========
I can compile and run the example CUDA programs that came with the SDK.  I know I am missing something simple here, but what is it?  
 解决方案 
I guess you are missing to link to the correct library.
Make sure you have the CUDA library added under "Configuration Properties->Linker->Input".
Refer this.

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