[gentoo-user] Best CFLAGS

[gentoo-user] Best CFLAGS

[Thiago Lüttig]

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Hi folks, I have an Athlon XP 2600+ with 512MB of RAM and I was wondering
about the best CFLAGS to make my executables "run-like-hell" :).
Does anyone have a machine like this ?? I just can't stand windows XP
anymore on my home box, but i want to put my future gentoo box run faster
than a lightning(or something like that :]  )
Thanx.

-- 
______________________________

Atenciosamente,
Thiago Lüttig

MSN: tluttig@hotmail.com
ICQ:   194392373
______________________________

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Re: [gentoo-user] Best CFLAGS

[Raymond Lewis Rebbeck]

On Friday, 23 June 2006 9:04, Thiago Lüttig wrote:
> Hi folks, I have an Athlon XP 2600+ with 512MB of RAM and I was wondering
> about the best CFLAGS to make my executables "run-like-hell" :).
> Does anyone have a machine like this ?? I just can't stand windows XP
> anymore on my home box, but i want to put my future gentoo box run faster
> than a lightning(or something like that :]  )
> Thanx.

The best cflags are those on the safe cflags list at:

http://gentoo-wiki.com/Safe_Cflags

If you use stupid cflags you will most probably encounter serious breakage and 
simply be told to revert to the safe cflags and emerge world before you 
receive much help.

Packages that benefit greatly from certain cflags usually override your cflags 
with better ones in the ebuild. For example I believe xine-lib will force -O3 
regardless of what you specify in make.conf.

-- 
Raymond Lewis Rebbeck

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Re: [gentoo-user] Best CFLAGS

[ArYiX]

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2006/6/22, Thiago Lüttig <tluttig@gmail.com>:
>
> Hi folks, I have an Athlon XP 2600+ with 512MB of RAM and I was wondering
> about the best CFLAGS to make my executables "run-like-hell" :).
> Does anyone have a machine like this ?? I just can't stand windows XP
> anymore on my home box, but i want to put my future gentoo box run faster
> than a lightning(or something like that :]  )
> Thanx.
>


Best for what?


-march=athlon-xp -mtune=athlon-xp -O2 -pipe

is safe and give you a great performance

i use this CFLAGS for a similar machine Athlon XP 2600 (core Barton)

--aryix

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Re: [gentoo-user] Best CFLAGS

[Teresa and Dale]

ArYiX wrote:

> 2006/6/22, Thiago Lüttig <tluttig@gmail.com <mailto:tluttig@gmail.com>>:
>
>     Hi folks, I have an Athlon XP 2600+ with 512MB of RAM and I was
>     wondering about the best CFLAGS to make my executables
>     "run-like-hell" :).
>     Does anyone have a machine like this ?? I just can't stand windows
>     XP anymore on my home box, but i want to put my future gentoo box
>     run faster than a lightning(or something like that :]  )
>     Thanx.
>
>  
>  
> Best for what?
>  
>  
> -march=athlon-xp -mtune=athlon-xp -O2 -pipe
>  
> is safe and give you a great performance
>  
> i use this CFLAGS for a similar machine Athlon XP 2600 (core Barton)
>
> --aryix


I have been using this one for quite a while now and no problems yet anyway.

> CFLAGS="-march=athlon-xp -O2 -fomit-frame-pointer
> -momit-leaf-frame-pointer -fno-ident -pipe"


I got it from here: 
http://forums.gentoo.org/viewtopic-p-2314776.html#2314776  We have
pretty similiar rigs.  AMD 2500+ with 1GB of ram. 

Hope that helps

Dale
:-)  :-)

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Re: [gentoo-user] Best CFLAGS

[Hemmann, Volker Armin]

On Friday 23 June 2006 02:20, ArYiX wrote:
> 2006/6/22, Thiago Lüttig <tluttig@gmail.com>:
> > Hi folks, I have an Athlon XP 2600+ with 512MB of RAM and I was wondering
> > about the best CFLAGS to make my executables "run-like-hell" :).
> > Does anyone have a machine like this ?? I just can't stand windows XP
> > anymore on my home box, but i want to put my future gentoo box run faster
> > than a lightning(or something like that :]  )
> > Thanx.
>
> Best for what?
>
>
> -march=athlon-xp -mtune=athlon-xp -O2 -pipe
>
> is safe and give you a great performance

tröööt.

If you use march, mtune is superflous ;)

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Re: [gentoo-user] Best CFLAGS

[Graham Murray]

"Hemmann, Volker Armin" <volker.armin.hemmann@tu-clausthal.de> writes:

> If you use march, mtune is superflous ;)

Except for builds which override -march but do not touch -mtune.
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