It would be great to have cling in the ports tree.
A piece of description from https://root.cern.ch/cling:
"What is Cling
Cling is an interactive C++ interpreter, built on the top of LLVM and Clang libraries. Its advantages over the standard interpreters are that it has command line prompt and uses just-in-time (JIT) compiler for compilation. Many of the developers (e.g. Mono in their project called CSharpRepl (link is external)) of such kind of software applications name them interactive compilers.
One of Cling's main goals is to provide contemporary, high-performance alternative of the current C++ interpreter in the ROOT project - CINT. The backward-compatibility with CINT is major priority during the development."
Added to https://wiki.freebsd.org/WantedPorts