RESOURCES_LIBRARY() # Taken from the default toolchain of the Xcode 12.5.1 DECLARE_EXTERNAL_RESOURCE(MACOS_SYSTEM_STL sbr:2561940097) # xcode toolchain allready contains system headers IF (USE_STL_SYSTEM AND NOT XCODE) CFLAGS( GLOBAL -I${MACOS_SYSTEM_STL_RESOURCE_GLOBAL}/include ) ENDIF() END()