[Bug libstdc++/104301] --enable-cstdio=stdio_pure not passed down to libstdc++-v3

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104301

--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-11 branch has been updated by Jonathan Wakely
<r...@gcc.gnu.org>:

https://gcc.gnu.org/g:e6503952a2f884917b52d0f4ae2707d25f1a0a39

commit r11-9757-ge6503952a2f884917b52d0f4ae2707d25f1a0a39
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.

    (cherry picked from commit 19b8946dbda5fda4389ef8e3ea162c3df2b1998d)