“Cosmopolitan Libc makes C a build-once run-anywhere language, like Java, except it doesn’t need an interpreter or virtual machine.”
One binary runs on Linux, Mac, Windows, three BSDs and bare metal. Java promised this and needed a VM to fake it. Here it is a polyglot file format and stock GCC or Clang. A whole industry of build matrices and per-OS installers exists because nobody thought this was possible.