Docker files for cross-builds using cargo-deb

These files allows you to build Debian packages for the (Debian) architectures i686, armhf and arm64 using an amd64 system.

Note that the Dockerfiles use the full Rust Debian Buster Docker image and not the slim version so that some common build-dependencies (such as libssl-dev) are already present.

Cross-compile to i686

Build the image:

$ docker build . -t cargo-deb-crossbuild/i686 --platform linux/386 -f Dockerfile
STEP 1/5: FROM docker.io/rust:bullseye
Trying to pull docker.io/library/rust:bullseye...
Getting image source signatures
...

In your Rust project, run:

$ docker run --rm -ti -v `pwd`:/app cargo-deb-crossbuild/i686
...
/app/target/debian/<your crate>.deb

You can find the resulting deb file in ./target/debian.

Cross-compile to arm64 (ARM v8)

Build the image:

$ docker build . -t cargo-deb-crossbuild/arm64 --platform linux/arm64/v8 -f Dockerfile
STEP 1/5: FROM docker.io/rust:bullseye
Trying to pull docker.io/library/rust:bullseye...
Getting image source signatures
...

In your Rust project, run:

$ docker run --rm -ti -v `pwd`:/app cargo-deb-crossbuild/arm64
...
/app/target/debian/<your crate>.deb

You can find the resulting deb file in ./target/debian.

Cross-compile to armhf (ARM v7)

Build the image:

$ docker build . -t cargo-deb-crossbuild/armhf --platform linux/arm/v7 -f Dockerfile
STEP 1/5: FROM docker.io/rust:bullseye
Trying to pull docker.io/library/rust:bullseye...
Getting image source signatures
...

In your Rust project, run:

$ docker run --rm -ti -v `pwd`:/app cargo-deb-crossbuild/armhf
...
/app/target/debian/<your crate>.deb

You can find the resulting deb file in ./target/debian.