GNU bug report logs - #63365
30.0.50; GCC 13.1 breaks building Emacs with native-compilation

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From: Andrea Corallo <acorallo <at> gnu.org>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 63365 <at> debbugs.gnu.org, arash <at> gnu.org, 65727 <at> debbugs.gnu.org, svraka.andras <at> gmail.com, cyril.arnould <at> outlook.com
Subject: bug#63365: bug#65727: bug#63365: bug#65727: 30.0.50; Build failure in MSYS2 when --with-native-compilation
Date: Sat, 18 May 2024 03:09:44 -0400

Andrea Corallo <acorallo <at> gnu.org> writes:

> Eli Zaretskii <eliz <at> gnu.org> writes:
>
>>> From: Andrea Corallo <acorallo <at> gnu.org>
>>> Cc: "63365 <at> debbugs.gnu.org" <63365 <at> debbugs.gnu.org>,  "eliz <at> gnu.org"
>>>  <eliz <at> gnu.org>,  65727 <at> debbugs.gnu.org,  Arash Esbati <arash <at> gnu.org>,
>>>   András Svraka <svraka.andras <at> gmail.com>
>>> Date: Fri, 17 May 2024 08:06:56 -0400
>>> 
>>> I believe this is a GCC bug as the sibling call optimizer should not run
>>> in functions making use of 'builtin_unwind_init', even if this one is
>>> undocumented (otherwise I can't see its reason of being 🙂).
>>> 
>>> So I filed a GCC bug [1].
>>> 
>>> Despite the fact that this will or not be recognized as a bug (and in
>>> case fixed), I think we'll have to fix this on our codebase disabling
>>> the sibling call optimizations on the sentive function(s).
>>
>> Agreed.  Can you install a patch along these lines?
>
> Work in progress 👍
>
>> Do we have other functions that could be sensitive to this issue?
>
> All functions calling 'flush_stack_call_func' are impacted, but I think
> I've a fix that touches only 'flush_stack_call_func'.

Okay I've installed 19c983ddedf on master, works here for me.

Cyril could you confirm works for you as well?

Thanks

  Andrea

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