http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49174
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> 2011-05-26 19:22:13 UTC --- Note the reason why clang warns is because of some body at MS decided that class and struct would act slightly different. I think we should not follow MS here and not warn about this. I think clang should not warn about it either by default but we have no control over that.