Shoutout to the Tools teams which develops cross, it's really amazing, did a project ago and had some problems to compiling static with rustls (OpenSSL really bugs with me, who knows why) do I tried Cross and felt in love, just works

If you have problems using musl with some libs, give it a go, you gonna love it ;P

https://github.com/rust-embedded/cross

Edit: my dumbass english failed me, sorry.