![]() ![]() Pi-builder has a small script that sets up binfmt_misc on the host system to run ARM files. ![]() You can configure binfmt_misc to run ARM binaries using an emulator (in this case, qemu-arm-static for x86_64 ). The Linux kernel, however, has a special way to run binaries on a different architecture. This image, however, will contain executables and libraries for the ARM architecture, and if your machine is, eg., x86_64, none of the commands in this image will run. As those are regular roots, you can use them to create your own base Docker image using FROM scratch. When you're developing software that will run on Raspberry Pi it makes sense to test it using the same environment to avoid future problems.Īrch Linux ARM (and other systems as well) comes in form of a minimal root file system you can install on and run from a flash drive. Thanks to Docker and its caching you won't run all of them each time you build a new OS execution will start from whatever command was changed, taking previous results from cache. Target OS building can consist of hundreds of complicated and long steps. Seriously, what can be easier than writing a docker file? A docker file is virtually ready documentation listing steps needed to set up the whole system. The resulting image can be exported to the SD card and loaded directly to Raspberry Pi. The build process is described using the default docker file syntax and it's executed in Docker on your dev machine. With pi-builder, you can build an image as if it was a simple Docker container rather than a real-world device OS. It's a new approach to target OS building on embedded devices. In case you use chroot and binfmt_misc or need to save intermediate changes, script complexity grows exponentially and it quickly becomes impossible to support. However, when you create a product based on a single-board machine (a small router, an IP-camera, a smart home controller, etc), you might want to log all changes you made to the fresh OS to be able to repeat them without forgetting an important step like setting up sysctl.Ī common solution is to create a large and horrifying shell script that executes all necessary actions either on the dev machine or the device itself. As a result, the system has the bare minimum to load, run and be further customised by the user. Those scripts create a chroot with necessary packages, edit configs, add users and so on. To build an OS, developers usually use a set of shell scripts, unique for each distribution. Pi-builder is an easy-to-use and extendable tool to build Arch Linux ARM for Raspberry Pi using Docker. ![]()
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