Tom,
On Tue, Jan 09, 2001 at 06:37:31PM -0500, Tom Lane wrote:
> Jason Tishler <Jason.Tishler@dothill.com> writes:
> > extern int sys_nerr;
> > int main() {
> > int x = sys_nerr;
> > ; return 0; }
>
> > The problem is gcc -O2 is being too smart, optimizing away the reference
> > to sys_nerr.
>
> Oh, that's nasty. Try a test program like so:
>
> extern int sys_nerr;
> int my_nerr;
> int main() {
> my_nerr = sys_nerr;
> return 0; }
>
> I don't think gcc will try to optimize away an assignment to a global
> variable.
You are correct -- the above program fails as expected.
Are you going to change config/c-library.m4 to generate the above
program instead?
Thanks,
Jason
--
Jason Tishler
Director, Software Engineering Phone: +1 (732) 264-8770 x235
Dot Hill Systems Corp. Fax: +1 (732) 264-8798
82 Bethany Road, Suite 7 Email: Jason.Tishler@dothill.com
Hazlet, NJ 07730 USA WWW: http://www.dothill.com