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Date: Thu, 26 Apr 2012 00:00:04 +0300
From: Eli Zaretskii <eliz AT gnu DOT org>
Subject: Re: Difficulties compiling emacs with gcc 4.6.2
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> From: Rugxulo <rugxulo AT gmail DOT com>
> Date: Wed, 25 Apr 2012 13:13:19 -0700 (PDT)
> 
> I guess nobody ever needed unexec on DWARF to work when COFF was
> sufficient.

Not true.  Back when DJGPP switched to DWARF2 as the default debug
info, I tried to switch Emacs to using that, but the dumped Emacs
crashed.  And I didn't (and don't) have time to work on fixing that.
But if someone gets that to work, I will happily switch, because COFF
debug info is barely supported in latest versions of GCC and GDB.

> > Thanks.  So it seems like we still need to use -gcoff to produce a
> > working and debuggable binary.
> 
> It's obvious that GCC 4.5.0 broke some stuff, but that's also when
> they removed support for "generic" COFF.

The problem started long before GCC 4.5.