abseil-cpp : Abseil Common Libraries (C++), LTS Branch ( https://abseil.io/ )
atkmm : C++ interface for the ATK library ( https://www.gtkmm.org https://gitlab.gnome.org/GNOME/atkmm )
glibmm : C++ interface for glib2 ( https://www.gtkmm.org https://gitlab.gnome.org/GNOME/glibmm )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a pg_overlay
For Paludis use this rsync : rsync://gentoo.zugaina.org/pg_overlay-portage
If you have a problem : ycarus(-at-)zugaina.org