On 28 Jun 2025, 10:33:24, Jay Faulkner wrote:
> On 6/28/2025 9:38 AM, whiteman808 wrote:
> > Is it necessary to reinstall Gentoo if I change CPU or motherboard? If
> > not, what steps should be done on the existing Gentoo installation? Do I
> > need to do these operations from chroot?
>
> I'm assuming this is amd64->amd64.
>
> So the main thing to worry about is CPU compatibility, and your CFLAGS. If
> you're using -march=native, there's a chance your system won't work as
> compiled. This isn't always true, but these days it's no longer a guarantee
> that a newer CPU will have all the features of the old.
>
>
> What I usually do in this case is:
>
> - set -march=x86-64-v3 (or whatever lowest-common-denominator CPU arch
> generic target works) --
> https://wiki.gentoo.org/wiki/Safe_CFLAGS#Generic_psABI_levels can help with
> this. - Ensure my system is fully updated, and `emerge --depclean`'d. -
> emerge -e @world # this will rebuild your entire system.
>
>
> You can *significantly* reduce the pain of this by using the binary package
> host.
>
>
> -JayF
Should I execute `emerge -e @world` inside chroot on some livecd?
