To install zfp, run the following command in macOS terminal (Applications->Utilities->Terminal)
sudo port install zfp
To see what files were installed by zfp, run:
port contents zfp
To later upgrade zfp, run:
sudo port selfupdate && sudo port upgrade zfp
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.