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MrDirt Gizmo
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PostPosted: Fri Jul 08, 2005 12:28 pm    Post subject: Reply with quote

wolf3d wrote:
ho lanciato un search generico ma dovrebbe andare bene


Va benissimo, grazie
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Thegreatone
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PostPosted: Tue Oct 18, 2005 1:12 pm    Post subject: Passare a GCC 3.4 con un Centrino....ne vale la pena? Reply with quote

Ciao a tutti!

Attualmente cul mio Centrino 1.5 uso GCC 3.3.6 con le seguenti CFLAGS:

Code:
CFLAGS="-O2 -mcpu=i686 -fomit-frame-pointer -march=pentium3 -mfpmath=sse -msse2 -mmmx"


Vale la pena fare l'aggiornamento a GCC 3.4 e adattare le CFLAGS a questo compilatore?

Grazie mille

Luca
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neryo
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PostPosted: Tue Oct 18, 2005 1:19 pm    Post subject: Re: Passare a GCC 3.4 con un Centrino....ne vale la pena? Reply with quote

Thegreatone wrote:

Vale la pena fare l'aggiornamento a GCC 3.4 e adattare le CFLAGS a questo compilatore?


se fai un ricerca questo tipo di argomento è stato trattato molte volte.
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Cazzantonio
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PostPosted: Tue Oct 18, 2005 1:36 pm    Post subject: Reply with quote

per esempio qua

[mod]topic mergiato[/mod]

io uso
Quote:
CFLAGS="-O2 -march=i686 -mmmx -msse -mfpmath=sse,387 -pipe -fomit-frame-pointer -momit-leaf-frame-pointer -fno-ident -ffast-math"

e non ho mai notato alcuna differenza nelle prestazioni... fai te
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federico
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PostPosted: Tue Oct 18, 2005 4:04 pm    Post subject: Reply with quote

Cazzantonio wrote:
per esempio qua

[mod]topic mergiato[/mod]

io uso
Quote:
CFLAGS="-O2 -march=i686 -mmmx -msse -mfpmath=sse,387 -pipe -fomit-frame-pointer -momit-leaf-frame-pointer -fno-ident -ffast-math"

e non ho mai notato alcuna differenza nelle prestazioni... fai te


Differenza rispetto cosa?
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Cazzantonio
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PostPosted: Thu Oct 20, 2005 9:02 am    Post subject: Reply with quote

federico wrote:
Differenza rispetto cosa?

Rispetto ad usare una march specifica... il gcc 3.4 ha questo in più per i processori centrino no?

p.s. anche le altre cflags sono lì per inerzia... effettivamente le potrei anche togliere...
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Peach
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PostPosted: Thu Oct 20, 2005 9:36 am    Post subject: Reply with quote

io ho un portatile con intel crentrino
e con gcc 3.3 uso costantemente queste flag:
Code:
CFLAGS="-O2 -march=pentium4 -pipe -fomit-frame-pointer -ffast-math"



ma -badabén- che non saprei dire se cambia molto tra march pentium4 e pentium3... forse la soluzione proposta da Thegreatone è la migliore?

Inoltre mi sono state consigliate queste flag se volessi passare a gcc 3.4 :

Code:
CFLAGS="-O2 -march=pentium-m -mtune=pentium-m -pipe -ftracer -fomit-frame-pointer -ffast-math -momit-leaf-frame-pointers"

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