find_package(Doxygen)

if (DOXYGEN_FOUND)
    set(DOXYGEN_IN ${CMAKE_CURRENT_SOURCE_DIR}/Doxyfile.in)
    set(DOXYGEN_OUT ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile)
    configure_file(${DOXYGEN_IN} ${DOXYGEN_OUT} @ONLY)
    add_custom_target(doc
        COMMAND ${DOXYGEN_EXECUTABLE} ${DOXYGEN_OUT}
        WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
        COMMENT "Generating documentation with Doxygen"
        VERBATIM )
else (DOXYGEN_FOUND)
    message("Doxygen not found, cannot build documentation")
endif (DOXYGEN_FOUND)