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Date: Wed, 26 Dec 2001 12:44:56 +0000
From: Richard Dawe <rich AT phekda DOT freeserve DOT co DOT uk>
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To: djgpp-workers AT delorie DOT com
Subject: Re: gcc 3.0.2 and -ggdb debugging info
References: <3C227C35 DOT 8DC5059 AT phekda DOT freeserve DOT co DOT uk> <3C25C254 DOT 2F6BC615 AT is DOT elta DOT co DOT il>
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Reply-To: djgpp-workers AT delorie DOT com

Hello.

Eli Zaretskii wrote:
> I don't think GDB is the culprit here: it supported stabs since v4.18,
> perhaps even before that.  I'm quite sure stabs work for me with GCC
> 3.0.2 as well, but I cannot test that at the moment.
> 
> Do -ggdb and -gstabs give you the same results?

No. I tried the following and they produced debug info that makes 'l main'
work in gdb:

     -gstabs
     -gstabs+
     -gstabs+3

I tried the following and they produced debug info that makes 'l main'
fail in gdb:
 
     -ggdb
     -ggdb3

> If nothing else helps, could you make the offending program (source
> and unstripped binary) available for download somewhere, so I could
> look into it?

The sources that originally showed the problem are my current zippo work
area and it's not ready for a check-in and I don't have enough web space
to upload an archive of it. Anyway, I built some binaries of it that you
can download here:

    http://www.phekda.freeserve.co.uk/richdawe/djgpp/gdb/gdb-problem.zip

The binaries are in zippo/ in the archive, with a log of the commands used
to build the sources.

I also tried to reproduce the problem using a simple case. The archive
contains this simple case in simple/. I built objects with -gstabs+ and
-ggdb3 and linked as plain objects and as libraries. I thought perhaps
binutils had stomped on the objects, when constructing libzippo, as part
of the zippo build process. Unfortunately the simple case shows no
difference between -gstabs+ and -ggdb3.

The stock zippo 0.1.5 sources show the same problem as my zippo work area.
You can get these here:

    http://www.phekda.freeserve.co.uk/richdawe/zippo/#dl

Please let me know if you need anything else.

Thanks, bye, Rich =]

-- 
Richard Dawe [ http://www.phekda.freeserve.co.uk/richdawe/ ]