https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103891
--- Comment #9 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:164a761a9f4798dc69ecab80097807636dc17d61 commit r12-7227-g164a761a9f4798dc69ecab80097807636dc17d61 Author: Jonathan Wakely <jwak...@redhat.com> Date: Mon Feb 14 12:46:10 2022 +0000 libstdc++: Use __cpp_concepts instead of custom macro [PR103891] With the new value of __cpp_concepts required by P2493, we can test whether the compiler supports conditionally trivial special members. This allows us to remove the workaround that disables fully-constexpr std::variant for Clang. Now it should work for non-GCC compilers (such as future releases of Clang) that support conditionally trivial destructors and define the new value of __cpp_concepts. libstdc++-v3/ChangeLog: PR libstdc++/103891 * include/bits/c++config (_GLIBCXX_HAVE_COND_TRIVIAL_SPECIAL_MEMBERS): Remove. * include/std/variant: Check feature test macros instead. * include/std/version: Likewise.
