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Date: Wed, 26 Dec 2001 22:18:20 +0200
From: "Eli Zaretskii" <eliz AT is DOT elta DOT co DOT il>
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To: Richard Dawe <rich AT phekda DOT freeserve DOT co DOT uk>
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In-reply-to: <3C2A0CDA.865087B5@phekda.freeserve.co.uk> (message from Richard
	Dawe on Wed, 26 Dec 2001 17:46:02 +0000)
Subject: Re: gcc 3.0.2 and -ggdb debugging info
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> Date: Wed, 26 Dec 2001 17:46:02 +0000
> From: Richard Dawe <rich AT phekda DOT freeserve DOT co DOT uk>
>  
> > This is, of course, your problem, Richard: your version of GDB
> > doesn't know about DWARF2.  So you must either download the GDB
> > sources from the GNU FTP site and build it (it should build with
> > DJGPP right out of the box, if you follow the instructions in the
> > djgpp/README file), or use -gstabs+.
> 
> My connection to the Internet is a 56kbps modem, so I think I'll just use
> -gstabs+.

If it's important, I can let you have my GDB 5.1 binary.

> > But I also see another possible problem with your system
> > configuration: when I type "gdb zippo-ggdb3.exe", GDB 5.1 complains
> > thusly:
> > 
> >   Dwarf Error: wrong version in compilation unit header
> > 
> > So I suspect that either your GCC or Binutils version is not the
> > latest one, and you have some bug in generating the DWARF2 debug info.
> > Please see if you need to upgrade any of these two packages.
> 
> I don't see this error with gdb 5.0.

That's because GDB 5.0 doesn't know about DWARF2, so it doesn't try
to parse the DWARF2 info.

> I've put new versions of the zippo executable built with -ggdb3 here:
> 
>     http://www.phekda.freeserve.co.uk/richdawe/djgpp/gdb/

I cannot use those: they are in some strange format, so it seems.  The
Web page says they are *.gz files, but Gzip says they are not in gzip
format.  Looking at the files, I see that they begin with "MZ", so I
thought they are uncompressed executables and tried to debug them with
GDB.  But GDB says "unrecognized file format".  So I'm stumped.