bug#71292: 30.0.50; macOS: .elns have no debug info

[Andrea Corallo <acorallo@gnu.org>]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Gerd Möllmann <gerd.moellmann@gmail.com>
>> Cc: 71292@debbugs.gnu.org, Andrea Corallo <acorallo@gnu.org>
>> Date: Sun, 02 Jun 2024 07:41:13 +0200
>> 
>> > This should be reported to the GCC and libgccjit folks.  The most
>> > probable cause is incorrect DWARF debug info emitted by the compiler.
>> > Alternatively, it could be that LLDB interprets the debug info
>> > incorrectly.  I sometimes see similar problems when debugging Emacs,
>> > especially in optimized versions: arguments in function calls are
>> > shown in reverse order, which of course is bogus, since the code
>> > works as expected.
>> 
>> After reading the GCC "how to report a bug" advice, I don't think I can
>> produce something useful for them in any reasonable time frame.
>> 
>> The jit people will also not be of great help I'm afraid. There seems to
>> be no one in the know using macOS :-).
>
> I think you should still report that, as best as you can and could
> afford to.  It is way better than keeping the information here or to
> yourself.  Maybe someone will pick up the gauntlet.  Or not.

+1

>> BTW, I'm now using the attached change in my Emacs, which allows me to
>> set native-comp-debug, -speed, and -driver-options via environment
>> variables. Maybe that's something for Andrea (CC'd).
>
> In general, I don't like using environment variables for this, because
> they are passed to sub-processes as well, something you don't
> necessarily want.

+1 as well

  Andrea