An example of cross compiling Hello World program in Rust for Raspberry Pi Zero

raspberry_hello_world_rust.md

Rust cross compilation for Raspberry Pi Zero

Create a Hello World project:

cargo new hello_rpi
cd hello_rpi

Create .cargo/config.toml in the project directory with the following contents:

[build]
target = "arm-unknown-linux-musleabihf"
rustflags = ["-C", "linker=arm-linux-gnueabihf-gcc"]

Here's a Dockerfile for building:

FROM rust:buster

RUN rustup target add arm-unknown-linux-musleabihf
RUN apt update && apt-get install -y gcc-arm-linux-gnueabihf

WORKDIR /build
COPY . /build
RUN cargo build --release

And here's deploy.sh script for running the build, extracting the articfact and deploying it to the Raspberry Pi.

It assumes that the Pi is accessible via SSH with pi@raspberrypi.local.

#/bin/bash -e

docker build -t hello_rpi:latest .
docker run -d -it --rm --name hello_rpi_artifact hello_rpi:latest
docker cp hello_rpi_artifact:/build/target/arm-unknown-linux-musleabihf/release/hello_rpi .
docker stop hello_rpi_artifact
scp ./hello_rpi pi@raspberrypi.local:~/hello_rpi
rm ./hello_rpi