https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104301
--- Comment #2 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:19b8946dbda5fda4389ef8e3ea162c3df2b1998d commit r12-6979-g19b8946dbda5fda4389ef8e3ea162c3df2b1998d Author: Jonathan Wakely <jwak...@redhat.com> Date: Mon Jan 31 11:00:18 2022 +0000 libstdc++: Improve config output for --enable-cstdio [PR104301] Currently we just print "checking for underlying I/O to use... stdio" unconditionally, whether configured to use stdio_pure or stdio_posix. We should make it clear that the user's configure option chose the right thing. libstdc++-v3/ChangeLog: PR libstdc++/104301 * acinclude.m4 (GLIBCXX_ENABLE_CSTDIO): Print different messages for stdio_pure and stdio_posix options. * configure: Regenerate.