It's more than a little funny that you disparage syscalls being Linux's stable interface, and then immediately praise Android, which only works because glibc isn't uniquely privileged the way you seem to want.

Also, I daily drive Alpine Linux (using musl) and I'm quite happy to assure you that glibc really is only one option, not at all mandatory for desktop Linux.

> Hardly anything is written against the kernel ABI except glibc itself.

I'm working hard to change that.

Here's an entire lisp interpreter written in freestanding C using nothing but Linux system calls:

https://github.com/lone-lang/lone

It has a system-call primitive too, which means it can do anything.

Here's a TCP echo server written in lone lisp:

https://github.com/lone-lang/lone/blob/master/examples/tcp-e...

It works, and you don't need libc.

> Like it or not, glibc is the singular entry point for desktop Linux

Well I don't like it, and I've made it my mission to fix it.

Maybe lisp isn't the answer, Rust is. I've revived my liblinux crate too.

https://github.com/matheusmoreira/liblinux

I'm going to add system calls to this thing every day until I have every single one. Then I'll use them to make all of my applications.

Already have my first project planned: a custom Rust network stack for my QEMU virtual machines so I can firewall them off in userspace without root access.

> the Linux platform

The linux platform is these system calls. Everything else is userspace. This is exactly what makes it special.

https://www.matheusmoreira.com/articles/linux-system-calls