\<rant>
From all that I've experienced in the past few weeks dealing with C projects and various build systems and operating systems, I suspect that using Zig would work perfectly as an easy cross-platform alternative to CMake. Until I open up my code in VS Code and the C/C++ plugin just doesn't work, no auto-completion, no go-to-definition, syntax highlighting is broken, etc., and all because it can't find the files in places it ordinarily expects them to be. And maybe there will be some hacky way to fix it with a setting for the VS Code plugin, but likely not.
I'm not saying this is the case, but literally none of the setups I tried feels non-hacky so far, and every one of them has at least one noticable problem during development. I truly miss the days of writing apps for a single platform using its own native build tools. Maybe that's what I'll do: write this as a native Windows app using Visual Studio (ugh, such an awful editor though) and then if I get sales, port it to Mac OS X 10 using Xcode.app, and compile it for Linux inside WSL with GCC 15.
\</rant>