for(source, SOURCES) {
    contains(source,.*\\.mm?$) {
        warning(Objective-C source \'$$source\' found in SOURCES but should be in OBJECTIVE_SOURCES)
        SOURCES -= $$source
        OBJECTIVE_SOURCES += $$source
    }
}

isEmpty(QMAKE_OBJECTIVE_CC):QMAKE_OBJECTIVE_CC = $$QMAKE_CC

OBJECTIVE_C_OBJECTS_DIR = $$OBJECTS_DIR
isEmpty(OBJECTIVE_C_OBJECTS_DIR):OBJECTIVE_C_OBJECTS_DIR = .
isEmpty(QMAKE_EXT_OBJECTIVE_C):QMAKE_EXT_OBJECTIVE_C = .mm .m

objective_c.dependency_type = TYPE_C
objective_c.variables = QMAKE_OBJECTIVE_CFLAGS
objective_c.commands = $$QMAKE_OBJECTIVE_CC -c $(QMAKE_COMP_QMAKE_OBJECTIVE_CFLAGS) $(DEFINES) $(INCPATH) ${QMAKE_FILE_IN} -o ${QMAKE_FILE_OUT}
objective_c.output = $$OBJECTIVE_C_OBJECTS_DIR/${QMAKE_FILE_BASE}$${first(QMAKE_EXT_OBJ)}
objective_c.input = OBJECTIVE_SOURCES
objective_c.name = Compile ${QMAKE_FILE_IN}
silent:objective_c.commands = @echo objective-c ${QMAKE_FILE_IN} && $$objective_c.commands
QMAKE_EXTRA_COMPILERS += objective_c