https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105324
--- Comment #9 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-11 branch has been updated by Alexandre Oliva <aol...@gcc.gnu.org>: https://gcc.gnu.org/g:799ff8e3e38f62632a98f8931ca291d191e677d5 commit r11-9960-g799ff8e3e38f62632a98f8931ca291d191e677d5 Author: Alexandre Oliva <ol...@adacore.com> Date: Fri May 6 07:33:50 2022 -0300 [PR105324] libstdc++: testsuite: pr105324 requires FP from_char The floating-point overloads of from_char are only declared if _GLIBCXX_HAVE_USELOCALE is #defined as nonzero. That's exposed from charconv as __cpp_lib_to_chars >= 201611L, so guard the test body with that. for libstdc++-v3/ChangeLog PR c++/105324 * testsuite/20_util/from_chars/pr105324.cc: Guard test body with conditional for floating-point overloads of from_char. (cherry picked from commit 25389f3de489c25a6983db96428a6bf06aedc829)