Call CUDA from C++ Linking problems with calling CUDA from C++

[nagy]

Im having problems with calling CUDA from C++ and linking.

Im using VS2010 with the tools provided here http://forums.nvidia.com/index.php?showtopic=161096.

When I try to compile i get a linking error.

CUDA_Over.obj : error LNK2019: unresolved external symbol _PreOver_CUDAKernel referenced in function “void __cdecl PreOver_CUDA(void *,void const *,void const *,unsigned int)” (?PreOver_CUDA@@YAXPAXPBX1I@Z)

CUDA_Over.hpp

#ifndef CUDA_OVER_H

define CUDA_OVER_H

void PreOver_CUDA(void* h_dest, const void* h_source1, const void* h_source2, size_t size);

endif

CUDA_Over.cpp

#include "..\..\StdAfx.h"

#include "CUDA_Over.hpp"

extern "C" void PreOver_CUDAKernel(void*, const void*, const void*, size_t);

void PreOver_CUDA(void* h_dest, const void* h_source1, const void* h_source2, size_t size)

{

	PreOver_CUDAKernel(h_dest, h_source1, h_source2, size);

}

CUDA_OverKernel.cu

#include <stdio.h>

#include <assert.h>

#include <cuda.h>

__global__ void PreOver_GPUKernel(int* dest, int* source1, int* source2)

{

}

extern "C" void PreOver_CUDAKernel(void* h_dest, const void* h_source1, const void* h_source2, size_t size)

{

}

server.vxproj (I have removed alot of unnecessary nodes to reduce size)

<?xml version="1.0" encoding="utf-8"?> <?xml version="1.0" encoding="utf-8"?>

<ProjectGuid>{79388C20-6499-4BF6-B8B9-D8C33D7D4DDD}</ProjectGuid>

<RootNamespace>Server</RootNamespace>

<Keyword>Win32Proj</Keyword>

<Import Project="$(VCTargetsPath)\BuildCustomizations\CudaDriverApi30.props" />

<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />

<Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />

<Import Project="..\cuda\cuda.props" />

<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />

<Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />

<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />

<Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />

<PreBuildEvent>

  <Command>

  </Command>

</PreBuildEvent>

<ClCompile>

  <Optimization>Disabled</Optimization>

  <InlineFunctionExpansion>AnySuitable</InlineFunctionExpansion>

  <IntrinsicFunctions>true</IntrinsicFunctions>

  <FavorSizeOrSpeed>Speed</FavorSizeOrSpeed>

  <AdditionalIncludeDirectories>C:\Program Files\Microsoft DirectX SDK (June 2008)\Include;C:\Lokala Filer\SDK\ffmpeg\include;C:\Lokala Filer\SDK\bluefish444 5.8.0.31\Inc;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>

  <PreprocessorDefinitions>DISABLE_BLUEFISH;%(PreprocessorDefinitions)</PreprocessorDefinitions>

  <ExceptionHandling>Async</ExceptionHandling>

  <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>

  <EnableEnhancedInstructionSet>StreamingSIMDExtensions2</EnableEnhancedInstructionSet>

  <RuntimeTypeInfo>true</RuntimeTypeInfo>

  <PrecompiledHeader>Use</PrecompiledHeader>

  <WarningLevel>Level3</WarningLevel>

  <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>

</ClCompile>

<PreLinkEvent>

  <Command>

  </Command>

</PreLinkEvent>

<Link>

  <AdditionalDependencies>Dxguid.lib;Dsound.lib;Winmm.lib;Ws2_32.lib;avformat-51.lib;avcodec-51.lib;avutil-49.lib;GLee.lib;cuda.lib;cudart.lib;%(AdditionalDependencies)</AdditionalDependencies>

  <OutputFile>$(OutDir)Server.exe</OutputFile>

  <Version>

  </Version>

  <AdditionalLibraryDirectories>C:\Program Files\Microsoft DirectX SDK (June 2008)\Lib\x86;C:\Lokala Filer\SDK\ffmpeg\lib;C:\Lokala Filer\SDK\bluefish444 5.8.0.31\Lib;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>

  <IgnoreSpecificDefaultLibraries>LIBC.lib;%(IgnoreSpecificDefaultLibraries)</IgnoreSpecificDefaultLibraries>

  <GenerateDebugInformation>true</GenerateDebugInformation>

  <GenerateMapFile>true</GenerateMapFile>

  <MapExports>true</MapExports>

  <SubSystem>Windows</SubSystem>

  <OptimizeReferences>

  </OptimizeReferences>

  <EnableCOMDATFolding>false</EnableCOMDATFolding>

  <RandomizedBaseAddress>false</RandomizedBaseAddress>

  <FixedBaseAddress>false</FixedBaseAddress>

  <DataExecutionPrevention>

  </DataExecutionPrevention>

  <TargetMachine>MachineX86</TargetMachine>

</Link>

<PostBuildEvent>

  <Command>

  </Command>

</PostBuildEvent>

<None Include="resources\Icon2.ico" />

<None Include="resources\server.rc2" />

<ResourceCompile Include="resources\Server.rc" />

<CudaDriver Include="utils\image\CUDA_OverKernel.cu" />

<Import Project="$(VCTargetsPath)\BuildCustomizations\CudaDriverApi30.targets" />

[nagy]

i changed to runtime instead of driver in the project settings. Still the same problem though.

No one has any idea as to what might be causing this?

[Hus]

Hi Nagy

I got the sam eproblem but with C not C++.
My main function in C file (main.c)
My call kernal function is in cu (CallKernel.cu)

tried extern but doesnt work.

Did you sort out this? if yes can you please share it.

Thanks
Hus