[Build system] gnumake: build.zig for GNU's make program: https://www.gnu.org/software/make/

From the README:

Provides a package to build/run GNU's make program.

The primary use case for this project is to facilitate "incremental ports" to the Zig build system. Start with a project by building it with Make then incrementally transfer parts of it to build.zig while maintaining a working build that can be tested throughout. It's not recommended for projects to use this package long term.