Is dynamically linking Rust's standard library officially-supported or did you have to hack around that? I know static-linking is the default but I've never looked into doing otherwise
The flag to dynamically link dependencies exists, and is part of the compiler's stable flags, but I'm not sure how much it's actually used, or how well it actually works.
Correct, the ABI is not stable. Given that they build a base system with a single rustc, that's not an immediate concern, though of course, a more stable ABI helps dynamic linking be more relevant.
It works well in terms of programs working. It has similar challenges to C++ that various commonly used abstractions end up producing a lot of code on the program side regardless. It's nonetheless worthwhile, if you have enough programs and resource constraints.
