Databases
StackOverflow2013
Postsdbo
POLink error LNK2005 several CUDA files
Body
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POLink error LNK2005 several CUDA files
    text
    copied!<p>I got some problems with the error "Link error LNK2005 ... already defined". The files are as follows:</p> <pre><code>// 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) </code></pre> <p>Then I have this one:</p> <pre><code>// 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) </code></pre> <p>Then I have the kernel header:</p> <pre><code>#ifndef __BITMAPS_KERNEL__ #define __BITMAPS_KERNEL__ ...... // 9 kernels definitions #endif </code></pre> <p>And finally, I have this one:</p> <pre><code>// File Bitmaps_cuda.h #include &lt;cuda.h&gt; #include &lt;cuda_runtime.h&gt; #include &lt;device_launch_parameters.h&gt; #include &lt;device_functions.h&gt; #include &lt;stdio.h&gt; // Inside here there all the kernel functions that the files // Bitmap4.cu and Bitmap8.cu are using </code></pre> <p>The problem is that, if i don't include the <strong>#include "Bitmaps_cuda.h"</strong> in one of the Bitmap*.cu, of course, the compiler will say that I missed the definitions of the kernels functions. I read a lot of posts and i already included the "Additional Dipendencies" and the required PATHs. The problems started when I added the file Bitmap8.cu with its relative kernels, because before that, the application was working properly. </p> <p>Anyway, those are the error that i have:</p> <pre><code>1&gt;Bitmap8.cu.obj : error LNK2005: "void * __cdecl big_random_block(int(?big_random_block@@YAPAXH@Z) already defined in Bitmap4.cu.obj 1&gt;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&gt;Bitmap8.cu.obj : error LNK2005: "unsigned char __cdecl value(float,float,int(?value@@YAEMMH@Z) already defined in Bitmap4.cu.obj 1&gt;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&gt;Bitmap8.cu.obj : error LNK2005: "void __cdecl end_thread(void *)"(?end_thread@@YAXPAX@Z) already defined in Bitmap4.cu.obj 1&gt;Bitmap8.cu.obj : error LNK2005: "void __cdecl destroy_thread(void *)"(?destroy_thread@@YAXPAX@Z) already defined in Bitmap4.cu.obj 1&gt;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&gt;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&gt;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&gt;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&gt;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&gt;C:\Users\dberdin\documents\visual studio 2010\Projects\gpuSPAM\Debug\gpuSPAM.exe : fatal error LNK1169: one or more multiply defined symbols found </code></pre> <p>I tried different solutions but with any results.</p> <p>Thank you in advance!</p> <p><strong>EDIT</strong></p> <p>On the website (<a href="http://msdn.microsoft.com/en-us/library/72zdcz6f.aspx" rel="nofollow">http://msdn.microsoft.com/en-us/library/72zdcz6f.aspx</a>) i found that one of the causes of those errors is:<br> <em>- An absolute is defined twice, with a different value in each definition.</em><br> Well, actually, as i wrote in the bottom, i have these kind of definetions, but i can't do differently. Any idea how to solve it ?</p> <p>Thank you again in advance</p>
 

Querying!

 
Guidance
An individual column

Larger individual text columns get their own page to allow for proper reading.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload