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

[Jonathan Wakely]

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.



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