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Date: Mon, 29 Jun 2015 15:00:30 -0700 (PDT)
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Subject: Re: gdb 7.0 and coff debug format failing.
From: "Juan Manuel Guerrero (juan DOT guerrero AT gmx DOT de)" <djgpp AT delorie DOT com>
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On Monday, June 29, 2015 at 10:15:30 PM UTC+2, Juan Manuel Guerrero (juan DOT guerrero AT gmx DOT de) wrote:
> 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


OFYI, I have compiled gdb 7.0 using gcc346, bnu225br2 and djdev203 and the test program fails the same way for coff debug format.  It seems to be something different than djdev205.

Regards,
Juan M. Guerrero