If this weren't horribly mislabeled, it'd be a great behind-the-scenes article.

> Practical Libc-free threading on Linux

> This article will demonstrate a simple, practical, and robust approach to spawning and managing threads using only raw system calls.

This is neither practical nor simple nor robust.

It is a good write-up on what happens behind the scenes when you set up threads in your language of choice with your library of choice. Great if you have that understanding.

Bring this into any kind of production code base (that isn't itself a threading library) and it's grounds for dismissal, because it makes very evident a severe lack of insight and judgement on what tools to use for a given problem at hand.