To install llvm-cx, run the following command in macOS terminal (Applications->Utilities->Terminal)
sudo port install llvm-cx
To see what files were installed by llvm-cx, run:
port contents llvm-cx
To later upgrade llvm-cx, run:
sudo port selfupdate && sudo port upgrade llvm-cx
Reporting an issue on MacPorts Trac
The MacPorts Project uses a system called Trac to file tickets to report bugs and enhancement requests.
Though anyone may search Trac for tickets, you must have a GitHub account in order to login to Trac to create tickets.