https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94901
--- Comment #1 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:070b4df8a06539b661c134d436ea4207099fdcf0 commit r11-9-g070b4df8a06539b661c134d436ea4207099fdcf0 Author: Jonathan Wakely <jwak...@redhat.com> Date: Fri May 1 13:13:39 2020 +0100 libstdc++: Replace reserved identifier _T with _Tp (PR 94901) The libstdc++ manual documents that _T can not be used, because it's a macro in system headers on some targets. PR libstdc++/94901 * include/std/type_traits (__is_complete_or_unbounded): Replace BADNAME _T with _Tp. * testsuite/17_intro/badnames.cc: New test.