On Sat, 22 Jan 2005 19:34:11 -0500, Nick Smith <[EMAIL PROTECTED]> wrote:
> > -O3 is more optimized than -O2, but those optimizations usually make the
> > binaries larger which causes other slowdowns. The ideal system-wide
> > optimization
> > level is -O2 or -Os (-O2 with additional flags for small binaries).
> >
> could you go a little further on this? whats the difference between -O2
> and -Os? which is better for overal and what additional flags for small
> binaries are you talking about?
>
> thanks
>From 'man gcc'
-Os Optimize for size. -Os enables all -O2 optimizations that do not
typically increase code size. It also performs further optimiza-
tions designed to reduce code size.
-Os disables the following optimization flags: -falign-functions
-falign-jumps -falign-loops -falign-labels -freorder-blocks
-fprefetch-loop-arrays
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