QT mkspec for Xavier Cross Compile

Can anyone point me to a good QT Mkspec for cross compiling QT from src for the Xavier.

I am looking to do my development on an Ubuntu AMD64 machine, and need a bit of start with a mkspec

also recommendation for the good tool set would be appreciated

We have verified to install QT5 on Jetson Nano:

It may help your case on Xavier. FYR.