CHOST="i386-pc-linux-gnu" on a pentium 4 [solved]

[KaiNeR]

Hi i recently installed gentoo, but after doing some reading i think i may have initially compiled it incorrectly for my hardware, i set the CHOST to i386 and i'm not sure if think it should be i686 as i've got a pentium 4 2.8 processor.

should it be i686 ? and if i change my make.conf to i686 what command to i need to run to make all packages recompile+dependencies.

thanks

here is my make.conf
cat /etc/make.conf
# These settings were set by the catalyst build script that automatically built this stage
# Please consult /etc/make.conf.example for a more detailed example
CFLAGS="-O2 -mtune=pentium4 -pipe"
CHOST="i386-pc-linux-gnu"
CXXFLAGS="-O2 -mtune=pentium4 -pipe"
MAKEOPTS="-j2"
USE="kerberos mysql xml cups readline python oav libclamav acl automount ldap ldapsam pam winbin java nsplugin doc source dbus gtk svg svga gnome -qt -qt3 -qt4 -arts gtk2 hal avahi -kde dvd cdr -gbdm samba"
CCACHE_SIZE="2G"
INPUT_DEVICES="keyboard mouse"
VIDEO_CARDS="nv nvidia vesa"


GENTOO_MIRRORS="http://ftp.snt.utwente.nl/pub/os/linux/gentoo "

SYNC="rsync://rsync.europe.gentoo.org/gentoo-portage"
source /usr/portage/local/layman/make.conf
PORTDIR_OVERLAY="${PORTDIR_OVERLAY} /usr/local/overlays/xgl-coffee"

[nixnut]

you could change it, but i386 works fine too. You did set -mtune=pentium4 so you do get most of the optimisations for your cpu.
If you do change it a emerge -e world would be advisable.
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[KaiNeR]

most things i use seem to work (apart from xgl) and it all seems to be really stable, what differences will i notice by changing it to i686 ?

thanks for the quick reply

[Nick C]

essentially nothing id imagine, under the hood some code might be compiled differently but id imagine you wouldnt notice any real-world improvements.

[KaiNeR]

thanks again