if (NOT TARGET uninstall)
    if ( EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/cmake/cmake_uninstall.cmake.in" )
        configure_file("${CMAKE_CURRENT_SOURCE_DIR}/cmake/cmake_uninstall.cmake.in"
                       "${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake"
                        @ONLY)
        add_custom_target(uninstall COMMAND
            ${CMAKE_COMMAND} -P ${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake)
    endif ()
endif ()