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Intel 386 and AMD x86-64 Options

Hi,

I want to know if there is any difference in using -march=i686,
-march=pentium3, -march=athlon, -march=athlon-xp or if they are all
synonyms of -march=i686. I'm writing code in the configure.ac to add the
optios for the detected CPU, and I don't know if it will be enougth to
detect the family of the processor and use -march=i386, -march=i486,
-march=i586 and -march=i686, or if I have to find the CPU model and use
the specific option.

I'm not subscribed to this list, so please send a copy of the answer to
my personal address.

Thanks.

-- 

Ander Lozano Pérez
ander1 at wanadoo dot es

Desarrollador de DiaSCE
http://diasce.es.gnome.org
diasce at es dot gnome dot org
irc.gnome.org #DiaSCE

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