How to define MacOS Universal2 builds in cppbuild.sh?

[cansik]

I am currently working on bringing my knowledge from librealsense2 on Apple Silicon to the Java world. It is already compiling by using XCode from the command line (cansik@d1152f1).

Now the question is how this can be included in the current build pipeline. As Github Actions do not have M1 runners yet, it would be possible to use a MacOS Intel runner and create an Universal2 binary (as my python lib does).

But how should this be implemented in the cppbuild.sh? Or how should this be solved?

[saudet]

We can cross compile relatively easily. Check the cppbuild.sh files from other presets for some examples.

[saudet]

Duplicate of #1069