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Date:	Sat, 30 Apr 2016 02:19:25 +0200
From:	"Juan Manuel Guerrero (juan DOT guerrero AT gmx DOT de) [via djgpp AT delorie DOT com]" <djgpp AT delorie DOT com>
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To:	djgpp AT delorie DOT com
Subject:	Re: GCC 3.4.6 -gcoff produces executable without line number info
References:	<83bn4uxben DOT fsf AT gnu DOT org> <837ffix9o7 DOT fsf AT gnu DOT org> <5722455F DOT 3020906 AT gmx DOT de> <831t5py22r DOT fsf AT gnu DOT org> <57228FEC DOT 9080408 AT gmx DOT de> <83oa8sx19b DOT fsf AT gnu DOT org> <5723B974 DOT 3010800 AT gmx DOT de> <83wpnguqj5 DOT fsf AT gnu DOT org>
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Reply-To:	djgpp AT delorie DOT com

Am 29.04.2016 22:08, schrieb Eli Zaretskii (eliz AT gnu DOT org) [via djgpp AT delorie DOT com]:
>> Date: Fri, 29 Apr 2016 21:43:48 +0200
>> From: "Juan Manuel Guerrero (juan DOT guerrero AT gmx DOT de) [via djgpp AT delorie DOT com]"<djgpp AT delorie DOT com>
>>
>>   >  OK, thanks for this information.  I can only add that 6.9 seems to be
>>   >  OK as well -- as long as Binutils 2.26r3 are used.  Perhaps we could
>>   >  have v2.05 compiled GDB 6.9 on DJGPP sites?
>>
>> Yes, of course, if you make it available.  I have looked at ftp://ftp.fu-berlin.de/gnu/gdb/
>> and I have only found:
>>     gdb-6.8a.tar.bz2
>>     gdb-7.0a.tar.bz2
>> I do not understand the denomination.  Shall the "a" mean it is alpha?  I have
>> have not tried any of them.  It seems to be that the GDB 6.N.N serie still
>> supports COFF debug info and that the GDB 7.N.N have dropt them at some point.
>
> I have no idea what these "a" mean.
>
> I have gdb-6.8.tar.bz2 and gdb-7.0.tar.bz2.  I guess I was wrong, and
> the pretest I've been using eventually became GDB 7.0, not 6.9 (the
> time stamps of the two archives are just 1 month apart).  So I think
> GDB 7.0 should be OK.
>
> Let me know if you need me to upload these 2 archives somewhere.
>
> Thanks.
>
> P.S. On the Emacs front, it turns out the problem with invoking
> programs is due to some difference between v2.05 and v2.03, because an
> older version of Emacs built with v2.05 acquired the same disease.
> I'm still investigating this tricky problem.


OK, I have to correct one of my previous statements.  The last DJGPP port of
GDB that still offers COFF debug support to an extent that can be considered
as usefull is gdb72br3 and can be downloaded as:
   http://www.delorie.com/pub/djgpp/deleted/beta/v2gnu/gdb72br3.zip
Any later version like gdb73b is completely broken as has already been shown
in some previous mail.

It is possible to set breakpoints, but it is not possible to step into functions
that belong to other object files than the object file that is under inspection.
This means where the program counter currently points to.  E.g.: in my test program
you cannot step from the main function into function1 because this function is
defined in function1.c and not in main.c.  To step into function1 you have to
set a breakpoint like this:
  b function1
Then no matter if you use the "s" or the "n" command you end at the beginning
of function1.  Inside function1 you can normaly step into copy_strings because
this function is also defined inside function1.c.

This port is still available and should be considered as the last DJGPP port of
GDB that supports COFF debug info to certain extent to be still of some use.
I have found in my backup DVDs a port of GDB 7.0 I have produced in Juni 2015
and that I have never uploaded for some reason that I do not remember anymore.
That port behaves identical to gdb72br3.  If you think that your GDB archive is
better than gdb72br3 or my port of GDB 7.0, please let me know and I will download
it and produce a new port.

Regards,
Juan M. Guerrero

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