[Bug libstdc++/99995] [11 Regression] FAIL: 17_intro/headers/c++1998/49745.cc with -std=gnu++20

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99995

--- Comment #1 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jonathan Wakely <redi@gcc.gnu.org>:

https://gcc.gnu.org/g:29046e02b84a16b6315d952d7f76c502d0d021c2

commit r11-8127-g29046e02b84a16b6315d952d7f76c502d0d021c2
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Mon Apr 12 11:12:47 2021 +0100

    libstdc++: Fix test that fails in C++20 mode [PR 99995]

    The 17_intro/headers/c++1998/49745.cc test fails for C++20 mode with PCH
    enabled, because PCH makes it include <bits/stdc++.h>, which includes
    <atomic>, and that includes <unistd.h> in C++20 mode. The <unistd.h>
    dependency should go away when C++20 atomic waiting is stable, but will
    probably remain while the feature is experimental. Change the test to
    always include <bits/stdc++.h>, and XFAIL for C++20 and later.

    libstdc++-v3/ChangeLog:

            PR libstdc++/99995
            * testsuite/17_intro/headers/c++1998/49745.cc: Include all
            standard headers and XFAIL for effective-target c++20.