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Docker Image Build

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Docker images for compiling static Rust binaries using musl-cross-make, inspired by rust-musl-builder

Prebuilt images

Currently we have the following prebuilt Docker images on Docker Hub, supports x86_64(amd64) and aarch64(arm64) architectures.

Rust toolchain Cross Compile Target Docker Image Tag
stable aarch64-unknown-linux-musl aarch64-musl
stable arm-unknown-linux-musleabi arm-musleabi
stable arm-unknown-linux-musleabihf arm-musleabihf
stable armv5te-unknown-linux-musleabi armv5te-musleabi
stable armv7-unknown-linux-musleabi armv7-musleabi
stable armv7-unknown-linux-musleabihf armv7-musleabihf
stable i586-unknown-linux-musl i586-musl
stable i686-unknown-linux-musl i686-musl
stable mips-unknown-linux-musl mips-musl
stable mipsel-unknown-linux-musl mipsel-musl
stable mips64-unknown-linux-muslabi64 mips64-muslabi64
stable mips64el-unknown-linux-muslabi64 mips64el-muslabi64
nightly powerpc64le-unknown-linux-musl powerpc64le-musl
stable x86_64-unknown-linux-musl x86_64-musl

To use armv7-unknown-linux-musleabihf target for example, first pull the image:

docker pull messense/rust-musl-cross:armv7-musleabihf

Then you can do:

alias rust-musl-builder='docker run --rm -it -v "$(pwd)":/home/rust/src messense/rust-musl-cross:armv7-musleabihf'
rust-musl-builder cargo build --release

This command assumes that $(pwd) is readable and writable. It will output binaries in armv7-unknown-linux-musleabihf. At the moment, it doesn't attempt to cache libraries between builds, so this is best reserved for making final release builds.

How it works

rust-musl-cross uses musl-libc, musl-gcc with the help of musl-cross-make to make it easy to compile, and the new rustup target support.

Use beta/nightly Rust

Currently we install stable Rust by default, if you want to switch to beta/nightly Rust, you can do it by extending from our Docker image, for example to use beta Rust for target x86_64-unknown-linux-musl:

FROM messense/rust-musl-cross:x86_64-musl
RUN rustup update beta && \
    rustup target add --toolchain beta x86_64-unknown-linux-musl

Strip binaries

You can use the musl-strip command inside the image to strip binaries, for example:

docker run --rm -it -v "$(pwd)":/home/rust/src messense/rust-musl-cross:armv7-musleabihf musl-strip /home/rust/src/target/release/example


Licensed under [The MIT License](./LICENSE)

*Note that all licence references and agreements mentioned in the rust-musl-cross README section above are relevant to that project's source code only.