Compiling rust app with relibc

There are ways to use rust std with musl. I am looking into using relibc instead (on Linux). Is there any atm, and if not, what would I need to do to get it done?

Looking at std source, there are references to musl, does it mean I need to explicitly add support there?

I've posted this on users, but perhaps I'll find right people to answer that here)

You'd need to add a new target, <arch>-unknown-linux-relibc, set target_env = "relibc" and then you can use that cfg in the standard library the same way as musl.

The libc is part of the target.