Am Mittwoch, 1. Juli 2020, 03:30:59 CEST schrieb Thomas Mueller:
> > > That's what I did: I found a 2017 stage3 with a still older glibc and
> > > managed to upgrade to a 2020 gentoo while masking the last glibc
> > > versions. That was tricky because I had to git-checkout intermediate
> > > versions of the portage tree in order to deal with the EAPI changes but
> > > I have a working chroot now. Thanks.
> > 
> > That's the easy way to do it, yes.
> > 
> > The hard way is to treat this as a cross-compilation problem and bootstrap
> > your own stages from scratch. Instructions would be a bit longer...
> > 
> > Andreas K. Hüttel
> 
> I have looked through crossdev.  Is that what it would take to cross-compile
> and bootstrap stages from scratch?
> 
> Could that be done from (instead of an old glibc) musl, uClibc, or FreeBSD
> or NetBSD?

It could be done from anywhere to anywhere in principle.

(Like, building an old-glibc x86 stage on an arm64 machine...)

This is how I bootstrapped the first riscv stages. (Yes I know we need newer 
ones...) But I don't claim it was a straightforward process. Took some time.

-- 
Andreas K. Hüttel
dilfridge@gentoo.org
Gentoo Linux developer
(council, toolchain, base-system, perl, libreoffice)