https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94520
--- 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:c104e8f1b67a75ea82c62f1fd2aac69c09127562 commit r10-7601-gc104e8f1b67a75ea82c62f1fd2aac69c09127562 Author: Jonathan Wakely <jwak...@redhat.com> Date: Tue Apr 7 17:18:21 2020 +0100 libstdc++: Restore ability to use <charconv> in C++14 (PR 94520) This C++17 header is supported in C++14 as a GNU extension, but stopped working last year because I made it depend on an internal helper which is only defined for C++17 and up. PR libstdc++/94520 * include/std/charconv (__integer_to_chars_result_type) (__integer_from_chars_result_type): Use __or_ instead of __or_v_ to allow use in C++14. * testsuite/20_util/from_chars/1.cc: Run test as C++14 and replace use of std::string_view with std::string. * testsuite/20_util/from_chars/2.cc: Likewise. * testsuite/20_util/to_chars/1.cc: Likewise. * testsuite/20_util/to_chars/2.cc: Likewise.