add_custom_command(
    OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/CL/cl.hpp
    COMMAND ${CMAKE_COMMAND} -E make_directory ${CMAKE_CURRENT_BINARY_DIR}/CL
    COMMAND python ${CLCPP_SOURCE_DIR}/gen_cl_hpp.py -i ${CLCPP_SOURCE_DIR}/input_cl.hpp -o ${CMAKE_CURRENT_BINARY_DIR}/CL/cl.hpp
    DEPENDS ${CLCPP_SOURCE_DIR}/input_cl.hpp ${CLCPP_SOURCE_DIR}/gen_cl_hpp.py
    COMMENT "Rebuilding cl.hpp ...")
add_custom_target(generate_clhpp ALL DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/CL/cl.hpp SOURCES ${CLCPP_SOURCE_DIR}/input_cl.hpp)

add_custom_command(
    OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/CL/cl2.hpp
    COMMAND ${CMAKE_COMMAND} -E make_directory ${CMAKE_CURRENT_BINARY_DIR}/CL
    COMMAND ${CMAKE_COMMAND} -E copy ${CLCPP_SOURCE_DIR}/input_cl2.hpp ${CMAKE_CURRENT_BINARY_DIR}/CL/cl2.hpp
    DEPENDS ${CLCPP_SOURCE_DIR}/input_cl2.hpp
    COMMENT "Rebuilding cl2.hpp ...")
add_custom_target(generate_cl2hpp ALL DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/CL/cl2.hpp SOURCES ${CLCPP_SOURCE_DIR}/input_cl2.hpp)

install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/CL
        DESTINATION include
        FILES_MATCHING
        PATTERN "*.hpp"
        )