There are a couple how tos floating around, you might try this one. I’m not sure if this is the exact one i used or not.
This uses the mbed framework version rather than the Adafruit framework, different underlying RTOS versions for one thing i do believe.
I was able to get the Adafruit framework running, after many hours of debugging, but had to hack at the framework and platfom files.
There appears to be some work going on to pull in support, not sure the status.