Re: [gentoo-user-de] Re: Installation fuer "low end" System auf "besserem" System vorbereiten?

[Michal Kapalka <kapalka@mfn.sk>]

Haloo Liste,

ich habe auch Intel pentrium M procesor, ich habe mich nach diesen howto 
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="i686-pc-linux-gnu"
CFLAGS="-O2 -march=pentium3 -pipe -mfpmath=sse"
CXXFLAGS="${CFLAGS}"

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

CHOST="i686-pc-linux-gnu"
CFLAGS="-O2 -march=pentium4 -pipe -fomit-frame-pointer"
CXXFLAGS="${CFLAGS}"

For gcc >= 3.4.3:

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

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

</snip>

Liebe Grüße,

Michal Kapalka 


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