Re: Rebuilding packages that use std::call_once from libstdc++

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* Omair Majid:

> Hi,
>
> Jonathan Wakely <jwakely@xxxxxxxxxxxxxxxxx> writes:
>
>> Due to an unplanned ABI break that I caused in libstdc++, I will soon
>> start to rebuild the packages listed below. This rebuild will remove
>> references to some symbols in libstdc++.so which do not work as
>> intended, and so will not be present in the final gcc-11.1.0 release.
>>
>> See https://bugzilla.redhat.com/show_bug.cgi?id=1937698 for reference.
>>
>> Package maintainers should not need to do anything, but will see a
>> %release bump and a rebuild.
>
>>  dotnet3.1
>
> I am bit surprised that dotnet3.1 is in that list but not dotnet5.0.
>
> Is there some way I can confirm whether a package (like dotnet5.0) is
> affected or not?

For dotnet3.1, I see

  /usr/lib64/dotnet/host/fxr/3.1.13/libhostfxr.so
  /usr/lib64/dotnet/shared/Microsoft.NETCore.App/3.1.13/libhostpolicy.so

as affected.  They contain references to _ZNSt9once_flag11_M_activateEv
or _ZNSt9once_flag9_M_finishEb.  These two symbols are the critical
symbols to check for; they indicate a need for a rebuild.

I do not see such symbol references for dotnet5.0.  I have
double-checked that dotnet5.0 is part of the scanned set.

Thanks,
Florian
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