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

[Jonathan Wakely]

On 25/11/20 18:39 +0000, Jonathan Wakely wrote:
>On 25/11/20 10:35 +0000, Jonathan Wakely wrote:
>>I've pushed that as ad9cbcee543ecccd79fa49dafcd925532d2ce210 but there
>>are still other FAILs to be fixed.
>
>I think the other FAILs are due to a race condition in the tests,
>fixed by this patch. Tested x86_64-linux, powerpc64le-linux,
>sparc-solaris2.11 and powerpc-aix. Committed to trunk.
>
>I'll keep an eye on the testresults to see if this really fixes it or
>not.

This fixes some more races of the same kind, in different tiles.

Tested as above. Committed to trunk.


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