I currently have a generic i686 setup on my P4 with HT and EM64T. I've come to realize that I could be doing better so I've started considering switching over to use EM64T (nocona). I figure that I'll be switching my CHOST to x86_64-pc-linux-gnu and my march variable in CFLAGS to nocona (from the i686 it's set to now), rebootstrap and then do a full system/world rebuild but I haven't been able to find any documentation regarding which profile I should be using. I'm currently using default-linux/x86/2006.0 but which one might be best if I'm intending to use a multilib setup (since I'll be wanting to avoid breaking anything)?
Aside from that, does anyone have any information/suggestions relating to the use of EM64T in the Gentoo environment or in general? Thanks.
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