On 3/20/06, Krendoshazin Amor e Morte <[EMAIL PROTECTED]> wrote:
>
> I did some checking on the O4 flag, basically it's the O3 flag but
> begins hardware specific tuning, IPA and high order transformations.

I'm fairly certain that with gcc, only -O[0123] and -Os are respected:

http://gcc.gnu.org/onlinedocs/gcc-4.0.3/gcc/Optimize-Options.html#Optimize-Options

--
Dan
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