if (NOT TARGET uninstall)
  configure_file(
    "${CMAKE_CURRENT_LIST_DIR}/uninstall.cmake.in"
    "${CMAKE_CURRENT_BINARY_DIR}/uninstall.cmake"
    IMMEDIATE @ONLY)

  add_custom_target(uninstall
    COMMAND ${CMAKE_COMMAND} -P ${CMAKE_CURRENT_BINARY_DIR}/uninstall.cmake)
endif()