This port requires USES=compiler:c++11-lang to build on GCC-based
architectures because it wants to link to /usr/local/lib/libtag.so,
which is compiled with ports GCC, which uses new GCC ABI.

While here, add USES=gnome localbase and pet portlint.

PR: 234298
Submitted by: Piotr Kubaj
Approved by: portmgr (tier-2 blanket)