I edited mscore/CMakeLists.txt and removed lporttime. It then built to
completion.
diff musescore2-2.3.2+dfsg4.orig/mscore/CMakeLists.txt
musescore2-2.3.2+dfsg4.orig-modified/mscore/CMakeLists.txt
518c518
< set(PORTMIDI_LIB -lportmidi -lporttime) # Remove
-lporttime on RPM-based systems where PortTime is part of PortMidi.
---
> set(PORTMIDI_LIB -lportmidi) # Remove -lporttime on
RPM-based systems where PortTime is part of PortMidi, removed as
PortTime is part of PortMidi in latest libportmidi2.
Regards,
Jeroen Diederen