Yes, we have full support for MUSL. It's a

  $ rustup target add x86_64-unknown-linux-musl
  $ cargo build --target x86_64-unknown-linux-musl

away.

Yeah, Rust's musl support is great. We use it heavily at work for all sorts of CLI tools. Many thanks to everybody who worked on this.

(And if you need to link against common C libraries like OpenSSL or PostgreSQL, I maintain a Docker image with the necessary C toolchains, and instructions on how to use it: https://github.com/emk/rust-musl-builder. There are a couple of similar images out there, too, I think.)

You can also download the cross-compilation tarball for musl at https://static.rust-lang.org/dist/rust-std-1.31.0-x86_64-unk... if you installed rust that way. You'd then build normally:

    $ cargo build --target x86_64-unknown-linux-musl

By default rust links dynamically to glibc, while rust stuff is statically linked. Which I think is a reasonably good default. Most Linux systems provide glibc, and you can deploy binaries to them without those systems needing a rust installation.

Of course, there's the usual issue with glibc symbol versioning, so you probably want to build your binaries on the oldest supported system (say, a centos 6 container).

Rust's main toolchain has first class support for musl: https://rust-lang-nursery.github.io/edition-guide/rust-2018/...