Re: Optimization flags

Jeremy Barnes ha scritto:

> 
> We're better off letting the application writers decide which flags work for 
> them.

Application writers flags are generally replaced by %optflags on compilation.
And anyway they tend to use only -O2 (or often -O -g) which is the best safe
flag for every platforms. Even the "atlas" math libraries don't tend to
use the best possible flags on certain newer platform.

I just cited the best optimization flags I experienced on Opterons,
as term of comparisons (or gain) with respect to standard one. I don't have said
to use them.

Anyway, what about adding just -msse -msse2? Are they already
implicit to for gcc for X86-64 arch (because of default -mfpmath=sse)?

Bye.
Giuseppe.