Bill Sommerfeld writes:
> With respect to your suggested compiler flags:
> 
> 	-O6 -fomit-frame-pointer -m486
> 
> My understanding is that there is no difference between -O2 and -O6 in
> gcc for the x86 architecture.

I had been looking at the PGCC pages (http://www.goof.com/pcg), and
never noticed that the higher -O's they support are completely
nonfunctional in standard gcc.