Linker issue with CUDA API libraries

[Cobra91151]

Hi! I want to add Nvidia CUDA API to Qt (OS: Windows | Qt 5.7.1).

I have included:

.pro file

INCLUDEPATH += "C:\\Program Files\\NVIDIA GPU Computing Toolkit\\CUDA\\v8.0\\include"

win32 {
    contains(QMAKE_TARGET.arch, x86_64) {
      LIBS += "C:\\Program Files\\NVIDIA GPU Computing Toolkit\\CUDA\\v8.0\\lib\\x64\\cudadevrt.lib"
    } else {
      LIBS += "C:\\Program Files\\NVIDIA GPU Computing Toolkit\\CUDA\\v8.0\\lib\\Win32\\cudadevrt.lib"
    }
}

test.h file
#include <cuda_runtime.h>

I get errors in test.cpp :

Screenshot:

I have test it in Visual Studio 2015 as console project and it works, but not in Qt.

How to fix it? Thanks in advance.

[Chris Kawa]

That's not how you pass libraries to the linker. Change this:

LIBS += "C:\\Program Files\\NVIDIA GPU Computing Toolkit\\CUDA\\v8.0\\lib\\x64\\cudadevrt.lib"

to

LIBS += -L"C:/Program Files/NVIDIA GPU Computing Toolkit/CUDA/v8.0/lib/x64" -lcudadevrt

That's -L for the path and -l(lowercase L) for the library name without the extension.
After that re-run qmake (menu Build->Run qmake).

[Cobra91151]

@Chris-Kawa

I have changed to:

INCLUDEPATH += "C:\\Program Files\\NVIDIA GPU Computing Toolkit\\CUDA\\v8.0\\include"

win32 {
    contains(QMAKE_TARGET.arch, x86_64) {
      LIBS += -L"C:/Program Files/NVIDIA GPU Computing Toolkit/CUDA/v8.0/lib/x64" -lcudadevrt
    } else {
      LIBS += -L"C:/Program Files/NVIDIA GPU Computing Toolkit/CUDA/v8.0/lib/Win32" -lcudadevrt
    }
}

Run clean/run qmake/build but the errors still exists.

[Cobra91151]

@Chris-Kawa

I have found the bug and fixed. Thanks.

[vaibs1224]

@chris-kawa
Please tell me how to solved this issue..I am troubling for solving this issue on windows platform

[aha_1980]

@vaibs1224

Can you provide some more information?

• Which compiler?
• 32 or 64 bit?
• Can you show your .pro file and the actual linker command from the Compile Output?