Docker Rust Minimum glibc Target

This Docker image is used to compile Rust targeting a minimum glibc for more portable binaries. It is based on the official Rust Docker image and uses a toolchain, built using crosstool-ng, that mirrors glibc from Ubuntu 14.04. It also includes OpenSSL.

Usage

Compile

docker container run --rm --volume "$(pwd)":/src     \
    --init --tty --user "$(id --user):$(id --group)" \
    unixgeek2/rust-min-libc build --release

Check glibc dependencies

objdump -T BINARY | grep GLIBC | sed 's/.*GLIBC_\([.0-9]*\).*/\1/g' | sort -Vu

Compatability

As a smoke test, a simple Rust binary that uses the openssl crate was compiled two ways: first with the default feature set and second with the vendored feature. It was then executed on the following Docker images:

• ubuntu:14.04
• ubuntu:16.04
• ubuntu:18.04
• ubuntu:20.04
• ubuntu:22.04
• ubuntu:24.04
• debian:buster-slim
• debian:bullseye-slim
• debian:bookworm-slim
• rockylinux:8
• rockylinux:9
• opensuse/tumbleweed:latest
• opensuse/leap:latest

Docker Hub

rust-min-libc

Credits

• crosstool-ng
• A one-liner I was too lazy to come up with