Historically, when DNS breaks in a not-glibc environment, it's very often found to in fact be a violation of some standard by the not-glibc, rather than a program that fails to document a glibc dependency.
Just connect to the service running on localhost ...
I'm curious. Why isn't getaddrinfo implemented in a similar manner to the loaders that graphics APIs use? Shouldn't that functionality be the responsibility of whatever resolver has been installed?
That is how `getaddrinfo` works under GLIBC; it's called NSS. The problem (well, one of them) is the non-GLIBC implementations that say "we don't need no stinkin' loader!"
The problem is people delete glibc and are surprised when glibc features are missing.
The only point I'm making is: Linux does not require glibc.
Users and their programs usually do require glibc but that's their choice. It's not mandated. People could theoretically rewrite the entire Linux user space in pure freestanding Rust if they wanted to.
Name Service Switch is just a solution to a problem. There's no law that says Linux systems must have that system. Programs that depend on it will break if it's not there but that's not the fault of Linux.