Possible to auto select BMPGDBSerialPort?

[siliconwitch]

We tend to share a whole bunch of Black magic probes across our team who use Mac. It's become a bit of a ritual to always need to change the BMPGDBSerialPort value whenever someone picks up different hardware.

Would it be possible to add some kind of auto port selection in case BMPGDBSerialPort isn't explicitly given? For instance, if Mac is used, choose the first /dev/cu.usbmodem*1, or on Linux simply choose /dev/ttyACM0.