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if (DOXYGEN_FOUND)

    configure_file(${CMAKE_CURRENT_SOURCE_DIR}/OpenSubdiv.doxy ${CMAKE_CURRENT_BINARY_DIR}/OpenSubdiv.doxy @ONLY)

    add_custom_target(doc
        ${DOXYGEN_EXECUTABLE} 
        ${CMAKE_CURRENT_BINARY_DIR}/OpenSubdiv.doxy  
        WORKING_DIRECTORY 
        ${CMAKE_CURRENT_BINARY_DIR}
        COMMENT "Generating API documentation with Doxygen" VERBATIM
    )
else()
    
    message(WARNING
        "Doxyen was not found : support for Doxygen automated API documentation is disabled.")
        
endif()