Problems with GDB/GUD (emacs BZR)

[Stefano Sabatini <stefasab@gmail.com>]

Hi all,

~/s/emacs.bzr> emacs --version
GNU Emacs 24.0.50.1
[...]

~/s/emacs.bzr> gdb --version
GNU gdb (GDB) 7.0.1-debian
[...]

I'm having issues at using gdb, I tried various combinations
(using gdb --annotate=3, gdb -i=mi) but gdb is always mibehaving.

For example if I try gdb --annotate=3 I see lots of strings of the
kind:
"^Z^Zpre-prompt ... ^Z^Zpost-prompt ... ^Z^Zerror-begin" 

in the *gud* buffer.

If I try to use gdb -i=mi I got something of the kind:
---------------------------------------------------8<-------------------
(gdb) file hello
r
b main
Breakpoint 1 at 0x8048542: file hello.c, line 5.
(gdb) r
n
n
(gdb)
---------------------------------------------------8<-------------------

No prompt is shown and the pointer in the source code buffer is not
updated as I step over/into.


Finally if I don't specify the gdb flags I got this:
---------------------------------------------------8<-------------------
Current directory is /home/stefano/src/Sandbox/C/
GNU gdb (GDB) 7.0.1-debian
Copyright (C) 2009 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "i486-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /home/stefano/src/Sandbox/C/hello...done.
(gdb) Undefined command: "1-inferior-tty-set".  Try "help".
(gdb) Undefined command: "2-gdb-set".  Try "help".
(gdb) Undefined command: "3-gdb-set".  Try "help".
(gdb) Undefined command: "4-file-list-exec-source-files".  Try "help".
(gdb) Undefined command: "5-file-list-exec-source-file".  Try "help".
(gdb) Undefined command: "6-gdb-show".  Try "help".
(gdb) Undefined command: "7-stack-info-frame".  Try "help".
(gdb) Undefined command: "8-thread-info".  Try "help".
(gdb) Undefined command: "9-break-list".  Try "help".

(gdb) Undefined command: "-interpreter-exec".  Try "help".
help
(gdb) Undefined command: "-interpreter-exec".  Try "help".
r
(gdb) Undefined command: "-interpreter-exec".  Try "help".
help
(gdb) Undefined command: "-interpreter-exec".  Try "help".
---------------------------------------------------8<-------------------

So I'm badly stucked here, up to the point that I cannot to debug code
from emacs.

Can you give some guidance, or at least provide some hint regarding
how should I debug this problem? Up to now I didn't find anything
useful by googling, help is much appreciated.

Regards.