After several month of packaging in kde overlay and almost a month in tree, we have lifted the mask for KDE Plasma 5.3.1 today. If you want to test it out, now some infos how to get it.
For easy transition we provide two new profiles, one for OpenRC and the other for systemd.
root # eselect profile list
Following example activates the Plasma systemd profile:
root # eselect profile set 9
On stable systems you need to unmask the qt5 use flag:
root # echo "-qt5" >> /etc/portage/profile/use.stable.mask
Any packages affected by the profile change need to be rebuilt:
root # emerge -avuND @world
For stable users, you also need to keyword the required packages. You can let portage handle it with autokeyword feature or just grep the keyword files for KDE Frameworks 5.11 and KDE Plasma 5.3.1 from kde overlay.
Now just install it (this is full Plasma 5, the basic desktop would be kde-plasma/plasma-desktop):
root # emerge -av kde-plasma/plasma-meta
the Gentoo KDE Team