[Bug libc/28746] _FORTIFY_SOURCE does not work for stpcpy

["cvs-commit at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=28746

--- Comment #1 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Siddhesh Poyarekar
<siddhesh@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=fcfc9086815bf0d277ad47a90ee3fda4c37acca8

commit fcfc9086815bf0d277ad47a90ee3fda4c37acca8
Author: Siddhesh Poyarekar <siddhesh@sourceware.org>
Date:   Wed Jan 12 23:34:48 2022 +0530

    debug: Synchronize feature guards in fortified functions [BZ #28746]

    Some functions (e.g. stpcpy, pread64, etc.) had moved to POSIX in the
    main headers as they got incorporated into the standard, but their
    fortified variants remained under __USE_GNU.  As a result, these
    functions did not get fortified when _GNU_SOURCE was not defined.

    Add test wrappers that check all functions tested in tst-chk0 at all
    levels with _GNU_SOURCE undefined and then use the failures to (1)
    exclude checks for _GNU_SOURCE functions in these tests and (2) Fix
    feature macro guards in the fortified function headers so that they're
    the same as the ones in the main headers.

    This fixes BZ #28746.

    Signed-off-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
    Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

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