I tried to build OpenCV 3.1 using CMake (gui version) to enable Cuda. I installed the 64-bit version of Cuda version 7.5, and CMake automatically found the correct path to the Cuda toolkit. I made sure the WITH_CUDA value is set to ON, and click configure. This is what I got regarding Kuda:
CUDA detected: 7.5
CUDA NVCC target flags: -gencode;arch=compute_20,code=sm_20;-gencode;arch=compute_20,code=sm_21;-gencode;arch=compute_30,code=sm_30;-gencode;arch=compute_35,code=sm_35;-gencode;arch=compute_30,code=compute_30
...
Extra dependencies: comctl32 gdi32 ole32 setupapi ws2_32 vfw32 cudart nppc nppi npps cufft -LC:/Program Files/NVIDIA GPU Computing Toolkit/CUDA/v7.5/lib/x64
...
Other third-party libraries:
Use IPP: 9.0.1 [9.0.1]
at: C:/OpenCV-3.1.0/opencv/sources/3rdparty/ippicv/unpack/ippicv_win
Use IPP Async: NO
Use Eigen: NO
Use Cuda: YES (ver 7.5)
Use OpenCL: YES
Use custom HAL: NO
NVIDIA CUDA
Use CUFFT: YES
Use CUBLAS: NO
USE NVCUVID: NO
NVIDIA GPU arch: 20 21 30 35
NVIDIA PTX archs: 30
Use fast math: YES
Then I generate Visual Studio 12 2013 Win64.
Next, I open the newly created OpenCV.sln project in Visual Studio 2013 and create the project. It terminates without any errors, but 103 warnings are:
LINK : warning LNK4044: unrecognized option '/LC:/Program Files/NVIDIA GPU Computing Toolkit/CUDA/v7.5/lib/x64'; ignored
OpenCV builds just fine, and I can create programs with it. I can also enable "opencv2 / core / cuda.hpp" without any problems. However, when I try to use cuda :: getDevice (), I get this error:
OpenCV Error: No CUDA support (The library is compiled without CUDA support) in throw_no_cuda, file C:\builds\master_PackSlave-win64-vc12-shared\opencv\modules\core\include\opencv2/core/private.cuda.hpp, line 97
cv:: getBuildInformation(), :
Other third-party libraries:
Use IPP: 9.0.1 [9.0.1]
at: C:\builds\master_PackSlave-win64-vc12-shared\opencv\3rdparty/ippicv/unpack/ippicv_win
Use IPP Async: NO
Use Eigen: NO
Use Cuda: NO
Use OpenCL: YES
Use custom HAL: NO
, Cuda - , , . . !