https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98590
--- Comment #7 from Eric Botcazou <ebotcazou at gcc dot gnu.org> --- > I'm here with Richard, by using -std=c++11 for stage1 we get (at least to > some extent) verification that we aren't relying on GNU extensions and can > use other host compilers. Of course, further stages should just use > whatever g++ defaults to. In my experience this particular extent is very limited. If you want to use other host compilers, then regularly test them, but do not penalize the GNU project because of them.
