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Rust has supported statically linking to MSVC and musl for a while now but also added static glibc support on Linux very recently:

https://github.com/rust-lang/rust/pull/77386

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Is it possible to compile with statically linked musl with the pre-built Rust toolchain on a standard glibc based distribution?

Yes, but there are claims it is slower https://www.reddit.com/r/rust/comments/a6pna3/comment/ebzpzl...

musl is generally not optimized for performance.

Yes, it works well. The main caveat I've found is you need the rustls feature of packages rather than openssl. Though perhaps that was more related to cross compiling for Arm.

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