On Sat, May 19, 2007 at 11:28:46AM +1200, Mark Davies wrote:
> The configure test in 3.5.7 uses:
> 
> #include <math.h>
> int
> main ()
> {
> float f = 0.0; isinf(f)
>   ;
>   return 0;
> }

Yeah, two bugs: dead code elimination can optimise it away as gcc knows
that it is a const function. Second issue is that with -ffast-math it
can optimise it away as well.

Joerg