opencv

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set(VULKAN_INCLUDE_DIRS "${OpenCV_SOURCE_DIR}/3rdparty/include" CACHE PATH "Vulkan include directory")
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set(VULKAN_LIBRARIES "" CACHE PATH "Path to Vulkan Libraries.")
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try_compile(VALID_VULKAN
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      "${OpenCV_BINARY_DIR}"
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      "${OpenCV_SOURCE_DIR}/cmake/checks/vulkan.cpp"
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      CMAKE_FLAGS "-DINCLUDE_DIRECTORIES:STRING=${VULKAN_INCLUDE_DIRS}"
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      OUTPUT_VARIABLE TRY_OUT
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      )
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if(NOT ${VALID_VULKAN})
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  message(WARNING "Can't use Vulkan")
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  return()
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endif()
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set(HAVE_VULKAN 1)
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if(HAVE_VULKAN)
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  add_definitions(-DVK_NO_PROTOTYPES)
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  include_directories(${VULKAN_INCLUDE_DIRS})
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endif()
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