Hi, I encountered a bug with the port ‘root6’ on macOS 10.14 today (#57403 <https://trac.macports.org/ticket/57403>). One solution was to install open /Library/Developer/CommandLineTools/Packages/macOS_SDK_headers_for_macOS_10.14.pkginstall
In case that there are also other port that depend on those headers this should probably be added to the install instructions of MacPorts. This problem is new to macOS 10.14. Best wishes, Peter
