That's only if you want your source code to compile on a lot of different systems. If your goal is to be able to have your program run on a lot of systems, then

That's only if you want your source code to compile on a lot of different systems. If your goal is to be able to have your program run on a lot of systems, then it's so much easier to just attack the binary interfaces straight on and ignore the platform tooling. That's how I got my executables to run on seven operating systems. See https://justine.lol/ape.html https://justine.lol/ape.html