One of the most popular methods for building custom embedded Linux distributions is the Yocto Project. Yocto is a collaborative project under the Linux Foundation that uses the OpenEmbedded framework and the BitBake build engine. Poky, the reference system of the Yocto Project, follows a six-month release cycle and provides metadata organized into layers and recipes for building various packages and images. This tutorial outlines the exact steps to build an image with a very basic GNU/Linux distribution for the Raspberry Pi 5, including systemd support using Yocto LTS release Scarthgap. Follow the steps below:

* Download the source code:

git clone -b scarthgap https://git.yoctoproject.org/poky poky-rpi
cd poky-rpi
git clone -b scarthgap https://github.com/agherzan/meta-raspberrypi.git

* Initialize the build environment:

source oe-init-build-env

* Add BSP layer meta-raspberrypi to conf/bblayers.conf:

bitbake-layers add-layer ../meta-raspberrypi

* Append the following 3 lines to the end of conf/local.conf:

MACHINE = /”raspberrypi5/”
INIT_MANAGER = /”systemd/”
LICENSE_FLAGS_ACCEPTED = /”synaptics-killswitch/”

* Build a basic image for Raspberry Pi 5:

bitbake core-image-base

Related Videos
===
Episode 2: SSH for Remote Network Access
https://youtu.be/ltckiBV9FXg?si=DJwsKLDhHkDIqCIn
Episode 3: The Yocto Project on Raspberry Pi 5 Episode 3: Running Docker Containers
https://youtu.be/kQnOidK_U3M?si=5KiS1FK87OwfdQ0m
Episode 4: The Yocto Project on Raspberry Pi 5 Episode 4: U-Boot Bootloader
https://youtu.be/9tohomiv1Ug?si=kylUv0uT_BFmXt5g
Episode 5: Modifying U-Boot Environment in Linux with fw_setenv
https://youtu.be/SB5NvIF1IEU?si=0So6Gfv9hQR7gQgY

Useful Links
===
https://www.yoctoproject.org/
https://docs.yoctoproject.org/
https://www.openembedded.org/wiki/Main_Page
https://anavi.org/article/298/

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