Build Qt with Ubuntu host

In Qt 6, CMake is the build tool, which supports cross-compiling, that means the software is built on one system, but is intended to run on a different system.

The system used to build is called the host. The device which will run the software product is called the target.

The following tutorial content is for building a Qt for INTEGRITY 19.0.13 target on an Ubuntu 20.04 64 host:

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