if(TARGET mbgl-vendor-metal-cpp) return() endif() add_library( mbgl-vendor-metal-cpp INTERFACE ) target_include_directories( mbgl-vendor-metal-cpp SYSTEM INTERFACE ${CMAKE_CURRENT_LIST_DIR}/metal-cpp ) set_target_properties( mbgl-vendor-metal-cpp PROPERTIES INTERFACE_MAPBOX_NAME "metal-cpp" INTERFACE_MAPBOX_URL "https://developer.apple.com/metal/cpp/" INTERFACE_MAPBOX_AUTHOR "Apple" INTERFACE_MAPBOX_LICENSE ${CMAKE_CURRENT_LIST_DIR}/metal-cpp/LICENSE.txt )