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Date: Mon, 29 Jun 2015 22:16:34 +0200
From: "Juan Manuel Guerrero (juan DOT guerrero AT gmx DOT de)" <djgpp AT delorie DOT com>
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To: djgpp AT delorie DOT com
Subject: gdb 7.0 and coff debug format failing.
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Reply-To: djgpp AT delorie DOT com

I have compiled gdb 7.0 with both compilers gcc 5.1.0 and gcc 3.4.6 using
in both cases djdev205.  The result is disapointing.  I have compiled the
following small hello-world program:

#include <stdio.h>


int print(const char *message)
{
   int bytes;

   bytes = printf("This is the message:  \"%s\"\n", message);

   return bytes;
}

int main(void)
{
   char message[] = "qwertz";
   int bytes;

   bytes = print(message);

   return bytes;
}


If I use DWARF2 format everthing works as expected but if I use the coff debug
format I cannot step into the function that prints.  I can step through the main
function with problems but I cannot step into functions.  Off course the test program
has been compiled using gcc 3.4.6.  The output of the info source command is:

(gdb) info source
Current source file is a.c
Located in m:/_tests_gdb/a.c
Contains 21 lines.
Source language is c.
Compiled with COFF debugging format.
Does not include preprocessor macro info.

so gcc 3.4.6 seems to produce coff debug info and gdb 7.0 seems to recognize
this.  I will compile gdb 7.0 using djev203 and see if there is any difference.
I will also compile gdb 6.8a with djdev205, bnu225br2 and gcc346 to see if it
works better.  Of course, all binaries used have been downloaded from
http://ap1.pp.fi/djgpp/next/v2gnu.
Any suggestions are welcome.

Regards,
Juan M. Guerrero