>>emidoo+(OP)
A great overview of the terrible mess that underlies cross-3D-API shader compilation (and even though it focuses on D3D and Microsoft, it's not much better on other 3D APIs - for instance you simply can't cross-compile Metal shaders from a Linux host - only from macOS and - somewhat recently - Windows).
If the Mach team can pull off this whole "Zig as a cross-3D-API shader compiler" and make it work as smoothly as "Zig as a cross-compilation toolchain", then this would be pretty much the biggest thing in computer graphics since 1995 or so :)