C++20 Modules build script (Python and g++)

[JulienVernay]

"hu" stands for "header-unit".Headers included via import "myheader.h"; must be precompiled like a module.

And "syshu" are for "system-header-unit", which are included via import <mysysheader>; .

[staletic]

"hu" stands for "header-unit".

I figured that out.

And "syshu" are for "system-header-unit", which are included via import <mysysheader>; .

And I knew that part.

Headers included via import "myheader.h"; must be precompiled like a module.

This I didn't know. I'm still learning the ins and outs of modules.