http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52103
--- Comment #3 from mlg <mlg7 at yandex dot ru> 2012-02-04 09:50:39 UTC --- > You can use C++11 explicit override control Since it is a lot of existing code, I'm afraid I'd have to have _them_ used override 5 or 10 or so years ago.