[no line number information] gdb 5.0 with g++ on HP PA

[dryest]

Hello,

I compile with g++ 3.4.2
and start gdb 5.0 on HPPA machine.

-------------------------------------------------------------------
gdb demo_use
Detected 64-bit executable.
Invoking /opt/langtools5.0/bin/gdb64.
HP gdb 5.0 for PA-RISC 2.0 (wide), HP-UX 11.00
and target hppa2.0w-hp-hpux11.00.
Copyright 1986 - 2001 Free Software Foundation, Inc.
Hewlett-Packard Wildebeest 5.0 (based on GDB) is covered by the
GNU General Public License. Type "show copying" to see the conditions to
change it and/or distribute copies. Type "show warranty" for
warranty/support.
..
(gdb) b main
Breakpoint 1 at 0x4000000000002430: file demo_use.c, line 7 from
/home/dry/test/c/libtest/demo_use.
(gdb) r
Starting program: /home/dry/test/c/libtest/demo_use

Breakpoint 1, 0x4000000000002430 in .stub+0 ()
Current language:  auto; currently c
(gdb) n
Single stepping until exit from function .stub,
which has no line number information.
0x4000000000002414 in main ()
(gdb)
----------------------------------------------------------------------

Is it impossible to use gdb for the binary compiled with g++ ?

Thanks,