【发布时间】:2012-04-04 12:50:12
【问题描述】:
我遇到了错误“链接错误 LNK2005 ... 已定义”的一些问题。文件如下:
// File Bitmap4.cu
#include "Bitmap4.h" // header
#include "Bitmaps_cuda.h" // header with just the definitions of the kernels
..... // I call 3+2 kernel functions (3 in one method, 1 in another and 1 in another one)
那我有这个:
// File Bitmap8.cu
#include "Bitmap8.h" // header
#include "Bitmaps_cuda.h" // the same as above
..... // I call 4 kernel functions (4 in the same method)
然后我有内核头文件:
#ifndef __BITMAPS_KERNEL__
#define __BITMAPS_KERNEL__
...... // 9 kernels definitions
#endif
最后,我有这个:
// File Bitmaps_cuda.h
#include <cuda.h>
#include <cuda_runtime.h>
#include <device_launch_parameters.h>
#include <device_functions.h>
#include <stdio.h>
// Inside here there all the kernel functions that the files
// Bitmap4.cu and Bitmap8.cu are using
问题是,如果我没有在 Bitmap*.cu 之一中包含 #include "Bitmaps_cuda.h",当然,编译器会说我错过了定义的内核函数。我阅读了很多帖子,并且已经包含了“其他依赖项”和所需的路径。当我添加文件 Bitmap8.cu 及其相关内核时,问题就开始了,因为在此之前,应用程序工作正常。
无论如何,这些是我遇到的错误:
1>Bitmap8.cu.obj : error LNK2005: "void * __cdecl big_random_block(int(?big_random_block@@YAPAXH@Z) already defined in Bitmap4.cu.obj
1>Bitmap8.cu.obj : error LNK2005: "int * __cdecl big_random_block_int(int(?big_random_block_int@@YAPAHH@Z) already defined in Bitmap4.cu.obj
1>Bitmap8.cu.obj : error LNK2005: "unsigned char __cdecl value(float,float,int(?value@@YAEMMH@Z) already defined in Bitmap4.cu.obj
1>Bitmap8.cu.obj : error LNK2005: "void * __cdecl start_thread(unsigned int(__stdcall*)(void *),void *)" (?start_thread@@YAPAXP6GIPAX@Z0@Z) already defined in Bitmap4.cu.obj
1>Bitmap8.cu.obj : error LNK2005: "void __cdecl end_thread(void *)"(?end_thread@@YAXPAX@Z) already defined in Bitmap4.cu.obj
1>Bitmap8.cu.obj : error LNK2005: "void __cdecl destroy_thread(void *)"(?destroy_thread@@YAXPAX@Z) already defined in Bitmap4.cu.obj
1>Bitmap8.cu.obj : error LNK2005: "void __cdecl wait_for_threads(void * const *,int)"(?wait_for_threads@@YAXPBQAXH@Z) already defined in Bitmap4.cu.obj
1>Bitmap8.cu.obj : error LNK2005: "void __cdecl__device_stub__Z14float_to_colorPhPKf(unsigned char *,float const *)"(?__device_stub__Z14float_to_colorPhPKf@@YAXPAEPBM@Z) already defined in Bitmap4.cu.obj
1>Bitmap8.cu.obj : error LNK2005: "void __cdecl float_to_color(unsigned char *,float_const *)" (?float_to_color@@YAXPAEPBM@Z) already defined in Bitmap4.cu.obj
1>Bitmap8.cu.obj : error LNK2005: "void __cdecl__device_stub__Z14float_to_colorP6uchar4PKf(struct uchar4 *,float const *)"(?__device_stub__Z14float_to_colorP6uchar4PKf@@YAXPAUuchar4@@PBM@Z) already defined in Bitmap4.cu.obj
1>Bitmap8.cu.obj : error LNK2005: "void __cdecl float_to_color(struct uchar4 *,float_const *)" (?float_to_color@@YAXPAUuchar4@@PBM@Z) already defined in Bitmap4.cu.obj
1>C:\Users\dberdin\documents\visual studio 2010\Projects\gpuSPAM\Debug\gpuSPAM.exe : fatal error LNK1169: one or more multiply defined symbols found
我尝试了不同的解决方案,但没有任何结果。
提前谢谢你!
编辑
在网站 (http://msdn.microsoft.com/en-us/library/72zdcz6f.aspx) 上,我发现这些错误的原因之一是:
- 绝对值被定义了两次,每个定义中的值不同。
好吧,实际上,正如我在底部所写的那样,我有这些定义,但我不能做不同的事情。知道如何解决吗?
再次感谢您
【问题讨论】:
-
我包含了两次头文件!问题解决了!