my ports in the past 3 weeks while ports were broken on any 10.x
machines, which means I'm unable to maintain them. So let people know
that there's no available support for them until things are back to
normal (which also means that anyone with spare time will be able
to fix them without getting approval).
This port will install only shared libraries with threads support enabled,
that will allow for easy dependency handling for ports that required libgc
build with specific features and will allow to avoid hacks of building own
version of libgc library.
