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Message-ID: <42F7339E.1090900@mfn.sk>
Date: Mon, 08 Aug 2005 12:27:42 +0200
From: Michal Kapalka <kapalka@mfn.sk>
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Subject: Re: [gentoo-user-de] Re: Installation fuer "low end" System auf "besserem"
 System vorbereiten?
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Haloo Liste,

ich habe auch Intel pentrium M procesor, ich habe mich nach diesen howto=20
gehalten :

http://gentoo-wiki.com/Safe_Cflags

<snip>


      Pentium-M / Centrino (Intel)

vendor_id  : GenuineIntel
cpu family  : 6
model  : 9
model name  : Intel(R) Pentium(R) M processor XXXXMHz

For gcc < 3.4.3:

CHOST=3D"i686-pc-linux-gnu"
CFLAGS=3D"-O2 -march=3Dpentium3 -pipe -mfpmath=3Dsse"
CXXFLAGS=3D"${CFLAGS}"

Comment: I also have working system but no benchmark in speed difference=20
to the above with:

CHOST=3D"i686-pc-linux-gnu"
CFLAGS=3D"-O2 -march=3Dpentium4 -pipe -fomit-frame-pointer"
CXXFLAGS=3D"${CFLAGS}"

For gcc >=3D 3.4.3:

CHOST=3D"i686-pc-linux-gnu"
CFLAGS=3D"-O3 -march=3Dpentium-m -pipe -fomit-frame-pointer"
CXXFLAGS=3D"${CFLAGS}"

Indeed it seems more a question of belief than of real speed if you use=20
optimization level O2 or O3. O3 works well for me, but people may prefer=20
to stick with O2. Options concerning SSE and such things sometimes may=20
cause very long compile times until errors occur.

</snip>

Liebe Gr=FC=DFe,

Michal Kapalka=20


--=20
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