On Wednesday, February 2, 2005, at 11:59 PM, Chuck Swiger wrote:

> Dunric wrote:
>> I just wish to rebuild whole system including packages with
>> "-O2 -pipe -march=pentium3" in proper way.
>
> Be careful.  gcc-3.x using -O2 enables a form of optimization which 
> can break a fair amount of source code.  Consider using:
>
> 	-O2 -fno-strict-aliasing
>
> ...unless you understand and are willing to fix the type-punning 
> warnings.
>
>
What about -Os ? It seemed more like gcc-2's -O2.