[PATCH] libstdc++: Add C++2a synchronization support

[Jonathan Wakely]

On 22/11/20 01:27 +0000, Jonathan Wakely via Libstdc++ wrote:
>On Sat, 21 Nov 2020 at 23:55, David Edelsohn via Libstdc++
><libstdc++@gcc.gnu.org> wrote:
>>
>> I am seeing 93 new libstdc++ failures on AIX, even after Jonathan's
>> fixes.  And a few c++ failures with similar symptoms.  I'm not certain
>> that it is due to this patch, but it's the likely suspect.
>Yes, it's that patch.
>
>This should fix most of those errors, but I haven't finished testing
>it, and can't commit it now anyway.

I've committed this now.

Tested powerpc64le-linux and (lightly) on powerpc-aix and
sparc-solaris.


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