https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92271
--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jonathan Wakely <r...@gcc.gnu.org>: https://gcc.gnu.org/g:73ae6eb572515ad627b575a7fbdfdd47a4368e1c commit r11-3569-g73ae6eb572515ad627b575a7fbdfdd47a4368e1c Author: Jonathan Wakely <jwak...@redhat.com> Date: Wed Sep 30 18:24:48 2020 +0100 libstdc++: Use __is_same instead of __is_same_as PR 92271 added __is_same as another spelling of __is_same_as. Since Clang also spells it __is_same, let's just use that consistently. It appears that Intel icc sets __GNUC__ to 10, but only supports __is_same_as. If we only use __is_same for __GNUC__ >= 11 then we won't break icc again (it looks like we broke previous versions of icc when we started using __is_same_as). libstdc++-v3/ChangeLog: * include/bits/c++config (_GLIBCXX_HAVE_BUILTIN_IS_SAME): Define for GCC 11 or when !__is_identifier(__is_same). (_GLIBCXX_BUILTIN_IS_SAME_AS): Remove. * include/std/type_traits (is_same, is_same_v): Replace uses of _GLIBCXX_BUILTIN_IS_SAME_AS.
