https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97918
--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> --- And the default is -std=gnu++17.
jakub at gcc dot gnu.org via Gcc-bugs Fri, 20 Nov 2020 14:37:59 -0800
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97918
--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> --- And the default is -std=gnu++17.