Cross-compile for Raspberry Pi with Docker.
Install the following tools:
Check current builder instances:
docker buildx lsIf you see an instance that uses the docker driver, switch to it (it's usually the default):
docker buildx use <instance name>
Otherwise, create a builder:
docker buildx create --name my-builder --driver docker --useNOTE: You cannot create more than one instance using the docker driver.
Then inspect and bootstrap it:
docker buildx inspect --bootstrapPrepare the base cross-compilation image:
docker buildx build -f Dockerfile.cross --tag cross-stretch .NOTE: By default, the image is going to be available to use on the host as cross-stretch. If docker images doesn't show it, add the --load flag when building.
P.S. To bust the cache, use --no-cache.
Prepare the base image w/ some common libs usually available on the Pi:
docker buildx build -f Dockerfile.cross-pi --tag cross-pi .Compile the hello binary:
docker buildx build -f Dockerfile.hello -o type=local,dest=./bin .Compile the hello-pi binary:
docker buildx build -f Dockerfile.hello-pi -o type=local,dest=./bin .To make things easier, you can use the bake command.
To setup the base image:
docker buildx bake cross-stretchTo setup the base image w/ goodies:
docker buildx bake cross-piTo compile the binaries:
docker buildx bakeP.S. To bust the cache, you can use --no-cache.