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Message-ID: <4CCFCF3D.3050809@waagmeester.co.za>
Date: Tue, 02 Nov 2010 10:43:41 +0200
From: Coert Waagmeester <lgroups@waagmeester.co.za>
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Subject: [gentoo-user] CFLAGS
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Hello all,

Possible noob question.

I have installed a 64 bit gentoo on my intel Pentium D machine.
Now I am reading through /usr/share/portage/config/make.conf.example

My CFLAGS on that machine is the default currently: CFLAGS="-O2 -pipe"
But according to 
http://www.gentoo.org/doc/en/gentoo-amd64-faq.xml#cflags I can make it:
-O2 -march=core2 -pipe

Is this entirely necessary? Will it cause a big improvement?

If I do change, how do I recompile everything? (like --newuse for USE 
changes?)

Thank you,
Coert Waagmeester