apple/darwin-xnu ? reverse-engineered prompt

I'd like you to build me a project containing the source code for the Apple XNU kernel, which is the core part of operating systems like macOS. My goal is to explore how a real OS kernel is built and see if I can compile it myself.

Please set it up using the official source, which I believe is mostly written in C and C++. It should include the different components I've heard about, like the Mach kernel, parts from FreeBSD, and that C++ API for drivers called IOKit.

The most important thing is that the project should be configured so I can actually build it. Set up the makefiles so I can compile a 'DEVELOPMENT' version for an x86_64 machine. Also, make sure to include the various tools for testing, debugging, and profiling that come with the kernel source.