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

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Message #265 received at 63365 <at> debbugs.gnu.org (full text, mbox):

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: Re: bug#63365: bug#65727: 30.0.50; Build failure in MSYS2 when
 --with-native-compilation
Date: Fri, 17 May 2024 13:28:44 -0400

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'.

  Andrea

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