https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100186
--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> --- (In reply to Martin Liška from comment #7) > > The fact that something is in C++11 doesn't mean we can assume it in GCC, > > while GCC 4.8.x which we still want to support had roughly complete C++11 FE > > support, I think the libstdc++ side wasn't there yet. > > Do we really support it? https://gcc.gnu.org/install/prerequisites.html > mentions that an 'ISO C++11 compiler' is required. Yes, we do, support back to 4.8.x was part of the switch to C++11 language decision.