https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67160
--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> --- And the advantage of the feature-test macro is that users can test for that specific feature independent of the __cplusplus value. Of course if it's effected by -pedantic then that means it *isn't* supported with -std=c++11 -pedantic so the check needs to be more complicated. In any case, once Paolo says he's done here I'll update https://gcc.gnu.org/projects/cxx1z.html :-)
