Re: [gentoo-dev] Do we want optimal performance?

["Marcus D. Hanwell" <linux@cryos.net>]

Alin Nastac wrote:

> Klavs Klavsen wrote:
>
>> The end result should be, that Gentoo automagically selects the optimal
>> CFLAGS (in performance and stability - perhaps with some optimizations
>> flagged as "unstable" so people can select "optimize for performance" 
>> vs.
>> "optimize for stability") depending on the X, Y and Z from above.
>>  
>>
> If you don't want to give gentooers a chance to set whatever they want 
> in CHOST,CFLAGS and CXXFLAGS it would be a mistake. Not everyone want 
> the greatest opimization for their processor! For example, I use on my 
> servers optimizations for pentium2 no matter what processor I have on 
> that particular computer.

People could still have the choice to set whatever blanket optimisations 
they want, or even override the default C_FLAGS and CXXFLAGS as in 
package.use etc. Wouldn't this allow us to find optimal CFLAGS etc for a 
subset of the packages in Gentoo, and set default CFLAGS which could 
then be overridden?

I for one would be in favour of this. It could be a gradual process, may 
be added to profiles for different archs. With cascading profiles you 
could choose the profile with package specific optimisation, or a more 
generic profile with no package specific optimisations.

Not a Gentoo dev, but I for one think this is a great idea. I have seen 
this mentioned before, and I do believe that for certain packages this 
would be most beneficial. For other packages there may never be much point.

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