CONFIG -= warn_off+− QMAKE_CFLAGS += $$QMAKE_CFLAGS_WARN_ON+− QMAKE_CXXFLAGS += $$QMAKE_CXXFLAGS_WARN_ON+− QMAKE_OBJECTIVE_CFLAGS += $$QMAKE_OBJECTIVE_CFLAGS_WARN_ON+− +−