The impact of march=

[Ian Lance Taylor]

On Tue, Sep 4, 2012 at 11:12 AM, Christer Solskogen
<christer.solskogen@gmail.com> wrote:
> Does it, and if yes, has much impact on GCC if GCC itself was compiled with
> CFLAGS="-march=i7" (or any other kind of cpu, for that matter)?
> And if it does have any impact, what is a good measurement?

I imagine it would have some impact, though probably not much.

A fairly common way to measure impact is to measure total bootstrap
time.  Although there is a lot of I/O in a GCC bootstrap, it tends to
be dominated by CPU time.

Ian