CODEWITHSUNDEEP
opencvcmake
sajid sharlemin
sajid sharlemin

Reputation: 162

How to find in CMAKE file if OpenCV is compiled with CUDA

i am using opencv with another library. So i would like to compile a class if OpenCV has CUDA. i need to acheive this in Cmake file. But i cannot find any variable that tells whether OpenCV has CUDA or not.

FindOpenCV.cmake defines these variables

OpenCV_FOUND OpenCV_LIBS OpenCV_INCLUDE_DIR OpenCV_VERSION

now how can i find out if OpenCV is compiled with CUDA or not from this cmake file?

Upvotes: 1

Views: 2957

Answers (1)

vinograd47
vinograd47

Reputation: 6420

Here is the list of CMake variables, that can help you:

OpenCV_COMPUTE_CAPABILITIES - compute capability from which OpenCV has been compiled, can be added to nvcc flags.

list(APPEND CUDA_NVCC_FLAGS ${OpenCV_COMPUTE_CAPABILITIES})

OpenCV_CUDA_VERSION - CUDA toolkit version which was used to build OpenCV, if OpenCV was built without CUDA support, the variable is empty. You can check this variable:

if(OpenCV_CUDA_VERSION)
    # Have CUDA support
endif()

OpenCV_USE_CUBLAS - true if OpenCV was built with CUBLAS support

OpenCV_USE_CUFFT - true if OpenCV was built with CUFFT support

OpenCV_USE_NVCUVID - true if OpenCV was built with NVCUVID support

Upvotes: 6

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