Why type = <data variable, no debug info>?

["Munzir Taha (منذر طه)" <munzirtaha@gmail.com>]

Hi, in this small program logic tells me that errno and n should have the same 
value displayed in gdb. Am I missing something obvious?

# gdb ./testgdb
GNU gdb 6.4.90-debian
Copyright (C) 2006 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i486-linux-gnu"...Using host libthread_db 
library "/lib/libthread_db.so.1".

(gdb) l
1       #include        <errno.h>
2       #include        <stdio.h>
3
4       int main(int argc, char *argv[])
5       {
6               errno = ENOENT;
7               int n = errno;
8               printf("%d, %d\n", n, errno);
9               return(0);
10      }
(gdb) break 8
Breakpoint 1 at 0x80483ba: file testgdb.c, line 8.
(gdb) r
Starting program: /home/munzir/testgdb
warning: Lowest section in system-supplied DSO at 0xffffe000 is .hash at 
ffffe0b4

Breakpoint 1, main () at testgdb.c:8
8               printf("%d, %d\n", n, errno);
(gdb) p errno
$1 = 0
(gdb) p n
$2 = 2
(gdb) whatis errno
type = <data variable, no debug info>
(gdb) whatis n
type = int
                                    
-- 
Munzir Taha
Telecommunications and Electronics Engineer
Maintainer of Fedora Arabic Translation Project
https://listman.redhat.com/mailman/listinfo/fedora-trans-ar
Maintainer of the OpenBugs project page at
http://www.arabic-fedora.org/munzir/OpenBugs.html
Master CIW Designer, ICDL, MOUS, Linux+, LPI 101
Riyadh, SA