Back to the topic of the thread: As I mentioned I started to prepare a new root-filesystem within a btrfs-subvolume.
By using systemd-nspawn I "chroot" into it and can rebuild my system from scratch while running my main installation. I set up a second grub2-entry as well so I can even chose booting this and that root-partition (or better: "root-subvolume" ) I try to build the new system with gcc-4.9, just being curious, 4.9.2 for now. emerge -e @system went through fine completely ... but my @world is a different thing. Some gnome-related stuff does not compile yet, additionally complicated by the fact that I run the very unstable packages from the gnome-overlay, bringing gnome 3.14. This runs fine on my main installation (and on a thinkpad as well, btw). But gcc-4.9 might be a bit too early ;-) Anyway. This is just a small project for playing around ... Stefan
