[Bug libstdc++/96817] __cxa_guard_acquire unsafe against dynamically loaded pthread

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96817

--- Comment #20 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:9c1125c121423a9948fa39e71ef89ba4059a2fad

commit r11-4723-g9c1125c121423a9948fa39e71ef89ba4059a2fad
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Wed Nov 4 15:24:47 2020 +0000

    libstdc++: Fix test failure with --disable-linux-futex

    As noted in PR 96817 this new test fails if the library is built without
    futexes. That's expected of course, but we might as well fail more
    obviously than a deadlock that eventually times out.

    libstdc++-v3/ChangeLog:

            * testsuite/18_support/96817.cc: Fail fail if the library is
            configured to not use futexes.