gdb runs multi-threaded with non-threaded app and gets SEGV

[Larry Martell <larry at software-horizons dot com>]

I have a program that has 1 line of code - a call to
a third party libary function:

#include "ni488.h"

int main() {
        int handle = ibdev(0, 7, 0, 10, 1, 0);
}


The program is not multi-threaded nor does not link
with any multi-threaded libs. It's built like this:

gcc -g -o nitest nitest.c -lgpibapi

If I run the program outside of the debugger it does
not crash.

If I run it from within gdb here's what I get:

$ gdb nitest
GNU gdb 6.2-2mdk (Mandrakelinux)
Copyright 2004 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
"i586-mandrake-linux-gnu"...Using host libthread_db
library "/lib/tls/libthread_db.so.1".

(gdb) start
Breakpoint 1 at 0x8048398: file nitest.c, line 4.
Starting program: /home/martell/src/nitest2/nitest
[Thread debugging using libthread_db enabled]
[New Thread 1076484320 (LWP 9873)]
[Switching to Thread 1076484320 (LWP 9873)]
main () at nitest.c:4
4               int handle = ibdev(0, 7, 0, 10, 1, 0);
(gdb) c
Continuing.
[New Thread 1085078448 (LWP 9876)]
[New Thread 1093471152 (LWP 9877)]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1085078448 (LWP 9876)]
0x4005d609 in ?? () from
/usr/local/lib/libgpibapi.so.2

Can anyone tell me why gdb runs this as multi-threaded
and why I get a SEGV in gdb, but I do not when I run
it outside of gdb?

Thanks!
-larry