rust-musl-cross VS muslrust

Is my best bet just to use (rust-musl-cross)[https://github.com/messense/rust-musl-cross] as the builder image?

rust-musl-cross: active as last commit was 10 days ago. It said it based on rust-musl-builder. But this repo was created years ago. So why would this exist when there is also rust-musl-builder. What are the differences compared to rust-musl-builder and muslrust?

The example that is provided in the AWS Rust runtime repository shows them using a custom linker and rustup target in order to cross-compile for x86-based lambdas. I attempted to dive into how to get a arm64-based linker, but in the process of trying to figure out how to get that linker installed locally (no convenient packages for Ubuntu, sorry), I stumbled across a project that provides cross-compilation tooling for various platforms via Docker. That made my life a lot easier - Using the rust-musl-cross Docker container, all I have to do is wrap the call to cargo build, and it builds for the proper architecture:

That's isn't true, one can make fully independent static binary in rust

The winning combo that I found works great is a multistage build, using clux/muslrust to build the dependencies + the binary itself, then using a scratch image as the final stage. Depending on the complexity, the statically linked images I use range from ~9MB to ~22MB. The 9MB image was ported from an existing container that was dynamically linked, and if I remember right, the image was in the ~70-80MB range using debian:buster-slim as the final stage.

muslrust: seems to be active last commit on Oct 2, 2021. But what is the difference compared to the one above?

Oh, I remember that I use https://github.com/clux/muslrust and is there what the bug is triggered. Weirdly, running it locally not show it.

After a lot of searching I came across a Docker image which provides a clean environment for building Rust linked against musl libc. It includes curl, pq, sqlite3, and zlib, but the main one I needed was OpenSSL. This container image solved my problem and I can run using Docker locally as well as in the GitHub Action build workflow.