In case you're not trolling (and it's really hard to tell), those makefiles are for building projects whose source code is written using C or C++. The projects

In case you're not trolling (and it's really hard to tell), those makefiles are for building projects whose source code is written using C or C++. The projects they are building are things like the Java runtime, Go runtime, or the Rust compiler, but they are not building projects whose source code is written in Java, or Rust, or Go etc... What people are claiming is that make is used as a build system for projects whose source code is written in C or C++.