if(BUILD_DOCUMENTATION)
    find_package(Doxygen)
    if (NOT DOXYGEN_FOUND)
        message(
            FATAL_ERROR 
            "Doxygen is needed to build the documentation. Please install it correctly"
        )
    endif()

    configure_file(
    	opencc.doxy.in
    	opencc.doxy
    	@ONLY
        IMMEDIATE
    )

    add_custom_target(
    	apidoc
    	ALL
    	COMMENT
    		"Building API Documentation"
    	COMMAND
    		doxygen ${PROJECT_BINARY_DIR}/doc/opencc.doxy
        SOURCES
            ${PROJECT_BINARY_DIR}/doc/opencc.doxy
    )

    install(
    	DIRECTORY
    		${CMAKE_BINARY_DIR}/doc/html
    	DESTINATION
    		${DIR_SHARE_OPENCC}/doc
    )

    set_directory_properties(
    	PROPERTIES
    		ADDITIONAL_MAKE_CLEAN_FILES
    			"${CMAKE_BINARY_DIR}/doc/html"
    )
endif()