[PATCH] Fix quick_exit to match C++11 specification.

[Florian Weimer]

On 06/07/2016 03:17 PM, Carlos O'Donell wrote:

>> I also do not see compelling reason to provide a compat symbol this
>> specific issue.  The destruction handles are registered only with
>> __cxa_thread_atexit_impl and it is used only for thread_local on
>> C++.  And C++ definition on quick_exit stated that it does not
>> run the TLS destructors, so a program that relies on it is just
>> expecting a non-conforming implementation behaviour.
>
> The problem is that we've had a quick_exit that runs thread local
> destructors since glibc 2.10 (2009),

How so?  You only changed behavior for the 2.18 TLS dtor support added here:

commit ba384f6ed9275f3966505f2375b56d169e3dc588
Author: Siddhesh Poyarekar <siddhesh@redhat.com>
Date:   Mon Feb 18 19:08:21 2013 +0530

     C++11 thread_local destructors support

I don't see how your change makes a different for the libstdc++ 
approximation.

What am I missing?

Thanks,
Florian