[Bug gdb/14306] New: GDB doesn't work when execing different format

["hjl.tools at gmail dot com" <sourceware-bugzilla@sourceware.org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=14306

             Bug #: 14306
           Summary: GDB doesn't work when execing different format
           Product: gdb
           Version: 7.4
            Status: NEW
          Severity: normal
          Priority: P2
         Component: gdb
        AssignedTo: unassigned@sourceware.org
        ReportedBy: hjl.tools@gmail.com
    Classification: Unclassified


On Linux/x86-64:

[hjl@gnu-6 tmp]$ cat x.c
#include <unistd.h>

int
main ()
{
  execl ("/bin/ls", "ls", NULL);
}
[hjl@gnu-6 tmp]$ gcc -m32 x.c -g
[hjl@gnu-6 tmp]$ ./a.out 
...
plugtmp-23           zlib
[hjl@gnu-6 tmp]$ gdb a.out
GNU gdb (GDB) 7.4.50.20120327-cvs
Copyright (C) 2012 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 "x86_64-unknown-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /tmp/a.out...done.
(gdb) b main
Breakpoint 1 at 0x80483f5: file x.c, line 6.
(gdb) r
Starting program: /tmp/a.out 

Breakpoint 1, main () at x.c:6
6      execl ("/bin/ls", "ls", NULL);
(gdb) c
Continuing.
process 21057 is executing new program: /usr/bin/ls
warning: Selected architecture i386:x86-64 is not compatible with reported
target architecture i386
Architecture of file not recognized.
(gdb)

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