GDB 11 branching update (2021-05-30)

[Florian Weimer]

* Kevin Buettner via Gdb-patches:

> On Sun, 30 May 2021 07:24:08 -0700
> Joel Brobecker <brobecker@adacore.com> wrote:
>
>>   * [Simon/Kevin] <PR gdb/27526>
>>     Attaching to threaded process on glibc 2.33: libthread_db fails to initialize with "generic error"
>>     https://sourceware.org/bugzilla/show_bug.cgi?id=27526
>> 
>>     Patch v2 at:
>>     https://sourceware.org/pipermail/gdb-patches/2021-May/178485.html
>
> I've looked at and commented on Simon's v2 patch.  I found it okay and
> think that it should go in.

Good news.  Cc:ing Simon in case he doesn't follow this thread under a
completely different subject. 8-)

Do we need additional changes on the GDB side for glibc 2.34
compatibility?

How backportable is this patch?  It would help me if it were available
in Fedora 34 and possibly 33.

Thanks,
Florian