my attempt to create a single cross-compliation container dockerfile
to list the available cross compilation configurations: make list-available to build a cross build container: make where <target is one of the items returned by make list-available
the files in container_configs list the settings for each target container the version.env file lists the versions of the cross tool components to build
prebuilt containers are available on docker hub at: https://hub.docker.com/repository/docker/nhorman/builders/general