gobject-introspection : Introspection system for GObject-based libraries ( https://wiki.gnome.org/Projects/GObjectIntrospection )
olm : An implementation of the Double Ratchet cryptographic ratchet in C++ ( https://gitlab.matrix.org/matrix-org/olm )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a calculate
For Paludis use this rsync : rsync://gentoo.zugaina.org/calculate-portage
If you have a problem : ycarus(-at-)zugaina.org