Windows 编译错误：未定义对'；clGetPlatformInfo@20'；

我对OpenCL编程是个新手，我想运行一个简单的程序，它在“OpenCL并行编程开发食谱”中。 事实上，我想通过以下简单的程序查询OpenCl平台：

#include <stdio.h>
#include <stdlib.h>
#include <CL/cl.h>

void displayPlatformInfo(cl_platform_id id,
                     cl_platform_info param_name,
                     const char* paramNameAsStr) {
    cl_int error = 0;
    size_t paramSize = 0;
    error = clGetPlatformInfo( id, param_name, 0, NULL, &paramSize );
    char* moreInfo = (char*)malloc( sizeof(char) * paramSize);
    error = clGetPlatformInfo( id, param_name, paramSize,moreInfo, NULL );
    if (error != CL_SUCCESS ) {
        perror("Unable to find any OpenCL platform information");
           return;
    }
    printf("%s: %s\n", paramNameAsStr, moreInfo);
}
int main() {
    /* OpenCL 1.2 data structures */
    cl_platform_id* platforms;
    /* OpenCL 1.1 scalar data types */
    cl_uint numOfPlatforms;
    cl_int error;
    /*
Get the number of platforms
Remember that for each vendor's SDK installed on the
Computer, the number of available platform also
*/
    error = clGetPlatformIDs(0, NULL, &numOfPlatforms);
    if(error < 0) {
        perror("Unable to find any OpenCL platforms");
        exit(1);
    }
    // Allocate memory for the number of installed platforms.
    // alloca(...) occupies some stack space but is
    // automatically freed on return
    platforms = (cl_platform_id*) malloc(sizeof(cl_platform_id)
                                     * numOfPlatforms);
    printf("Number of OpenCL platforms found: %d\n",
       numOfPlatforms);
    // We invoke the API 'clPlatformInfo' twice for each
    // parameter we're trying to extract
    // and we use the return value to create temporary data
    // structures (on the stack) to store
    // the returned information on the second invocation.
    for(cl_uint i = 0; i < numOfPlatforms; ++i) {
        displayPlatformInfo( platforms[i],
                         CL_PLATFORM_PROFILE,
                         "CL_PLATFORM_PROFILE" );
        displayPlatformInfo( platforms[i],
                         CL_PLATFORM_VERSION,
                         "CL_PLATFORM_VERSION" );
        displayPlatformInfo( platforms[i],
                         CL_PLATFORM_NAME,
                         "CL_PLATFORM_NAME" );
        displayPlatformInfo( platforms[i],
                         CL_PLATFORM_VENDOR,
                         "CL_PLATFORM_VENDOR" );
        displayPlatformInfo( platforms[i],
                         CL_PLATFORM_EXTENSIONS,
                         "CL_PLATFORM_EXTENSIONS" );
    }
    return 0;
}

因为文件路径中有空格。所以，我的问题是：为什么在我编译我的项目时，“未定义的引用

clGetPlatformInfo@20”“出现了吗？还有另外两个错误（一个完全相同，另一个是“未定义引用

clGetPlatformIDs@12"")

我在网上搜索了很多天，却找不到答案（这些问题都有答案，但在Linux或Mac上……）

提前谢谢

---

Mathieu

看起来您正在尝试构建32位应用程序，同时链接64位版本的OpenCL.lib：

C:/Program Files/NVIDIA GPU计算工具包/CUDA/v6.5/lib/x64/OpenCL.lib

因此，要么以64位模式构建应用程序，要么修复指向32位版本OpenCL.lib的路径

SOURCES += \
    main.cpp

QMAKE_CXXFLAGS += -std=c++0x

INCLUDEPATH += \
    $$quote(C:/Program Files/NVIDIA GPU Computing Toolkit/CUDA/v6.5/include)

LIBS += \
    $$quote(C:/Program Files/NVIDIA GPU Computing Toolkit/CUDA/v6.5/lib/x64/OpenCL.lib)