OpenSubdiv/cmake/FindOpenCL.cmake

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# - Try to find an OpenCL library
# Once done this will define
#
#  OPENCL_FOUND - System has OPENCL
#  OPENCL_INCLUDE_DIR - The OPENCL include directory
#  OPENCL_LIBRARIES - The libraries needed to use OPENCL


find_package(PackageHandleStandardArgs)

if (APPLE)

    find_library( OPENCL_LIBRARIES 
        NAMES
            OpenCL 
        DOC "OpenCL lib for OSX"
    )

    find_path( OPENCL_INCLUDE_DIRS 
        NAMES
            OpenCL/cl.h 
        DOC "Include for OpenCL on OSX"
    )

    find_path( _OPENCL_CPP_INCLUDE_DIRS
        NAMES 
            OpenCL/cl.hpp 
        DOC "Include for OpenCL CPP bindings on OSX"
    )

elseif (WIN32)

    find_path( OPENCL_INCLUDE_DIRS 
         NAMES
             CL/cl.h 
    )

    find_path( _OPENCL_CPP_INCLUDE_DIRS 
        NAMES
            CL/cl.hpp
    )

    if( ${CMAKE_SYSTEM_PROCESSOR} STREQUAL "AMD64" )
        set(OPENCL_LIB_DIR "$ENV{ATISTREAMSDKROOT}/lib/x86_64")
    else()
        set(OPENCL_LIB_DIR "$ENV{ATISTREAMSDKROOT}/lib/x86")
    endif()

    find_library( OPENCL_LIBRARIES 
        NAMES
            OpenCL.lib 
        PATHS 
            ${OPENCL_LIB_DIR} 
            ENV OpenCL_LIBPATH
    )

    get_filename_component( _OPENCL_INC_CAND ${OPENCL_LIB_DIR}/../../include ABSOLUTE )

    find_path( OPENCL_INCLUDE_DIRS 
        NAMES
            CL/cl.h 
        PATHS 
            "${_OPENCL_INC_CAND}" 
            ENV OpenCL_INCPATH
    )

    find_path( _OPENCL_CPP_INCLUDE_DIRS 
        NAMES
            CL/cl.hpp 
        PATHS 
            "${_OPENCL_INC_CAND}" 
            ENV OpenCL_INCPATH
    )

elseif (UNIX)

    find_library( OPENCL_LIBRARIES 
        NAMES
            OpenCL
        PATHS 
            ENV LD_LIBRARY_PATH 
            ENV OpenCL_LIBPATH
    )

    get_filename_component( OPENCL_LIB_DIR ${OPENCL_LIBRARIES} PATH )

    get_filename_component( _OPENCL_INC_CAND ${OPENCL_LIB_DIR}/../../include ABSOLUTE )

    find_path( OPENCL_INCLUDE_DIRS 
        NAMES 
            CL/cl.h 
        PATHS 
            ${_OPENCL_INC_CAND} 
            "/usr/local/cuda/include" 
            "/opt/AMDAPP/include" 
            ENV OpenCL_INCPATH
    )

    find_path( _OPENCL_CPP_INCLUDE_DIRS 
        NAMES
            CL/cl.hpp 
        PATHS 
            ${_OPENCL_INC_CAND} 
            "/usr/local/cuda/include" 
            "/opt/AMDAPP/include" 
            ENV OpenCL_INCPATH
    )

else ()

    message( "Could not determine OpenCL platform" ) 

endif ()

find_package_handle_standard_args(OpenCL DEFAULT_MSG OPENCL_LIBRARIES OPENCL_INCLUDE_DIRS)

if(_OPENCL_CPP_INCLUDE_DIRS)

    set( OPENCL_HAS_CPP_BINDINGS TRUE )

    list( APPEND OPENCL_INCLUDE_DIRS ${_OPENCL_CPP_INCLUDE_DIRS} )

    list( REMOVE_DUPLICATES OPENCL_INCLUDE_DIRS )

endif(_OPENCL_CPP_INCLUDE_DIRS)

mark_as_advanced( OPENCL_INCLUDE_DIRS )