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From: Rugxulo <rugxulo AT gmail DOT com>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Abort when compiling using COFF debug format (-gcoff)
Date: Fri, 27 Jan 2012 19:43:35 -0800 (PST)
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Reply-To: djgpp AT delorie DOT com

Hi,

On Jan 27, 8:36 pm, Rugxulo <rugx DOT  DOT  DOT  AT gmail DOT com> wrote:
>
> You mean DWARF-2 plus extensions, right?

Hmmm, I might be wrong, I've not kept up. Seems like DWARF 4 (2010) is
latest standard, though I can't find anything newer than a brief
mention of DWARF 3 (released in 2006) in GDB's NEWS. (BTW, GDB 7.4 was
just released a few days ago.) Apparently old DWARF 1 isn't supported
anymore since GDB 6.7 or such in lieu of DWARF 2 or (GDB 7.0+) 3 or 4.
(But GCC does claim to support DWARF 2,3,4, with or without
extensions. Default seems to be "-g2 -gdwarf-2" [non-strict, esp. GCC
4.5.x or newer] according to the online 4.6.2 manual.)

http://dwarfstd.org/
http://www.gnu.org/software/gdb/
http://gcc.gnu.org/onlinedocs/gcc-4.6.2/gcc/Debugging-Options.html#Debugging-Options

P.S. It seems it was GCC 4.5.x that removed support for "generic COFF"
on IA32, etc. No huge surprise there.