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