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Introduction

This manual describes the rdk-generic-broadband-image build procedure for Yocto 4.0 builds. This will upgrade the build system used in RDKB, from dunfell(3.1) to kirkstone(4.0). In addition to upgrades to opensource packages, Yocto 4.0 also contain Long term Support release feature. The current version lacks the variety of features available in the kirkstone. The upgraded build tools will be used to generate rdk-generic-broadband-image for Raspberrypi reference platform. 

Yocto 4.0  Upgradation support the following:

• Yocto BSP layer for meta-raspberrypi.
• OpenEmbedded and Yocto kirkstone.
• Linux kernel 5.10.32.
• Version upgrades for bitbake, and other oe/python recipes.

Each component in RDK is a standalone repository with its own individual build tools producing a library or set of binaries. When we upgrade the OE layers to the newer versions, we need to make necessary changes in the RDK layers which use these components, to avoid build failures.

Host Setup

The OpenEmbedded build system should be able to run on Ubuntu 20.0 distribution/other compatible linux distribution with the following versions for Git, tar, and Python.

• Git 2.25.1 or greater
• tar 1.30 or greater
• Python 3.10.4 or greater
• Coreutils(E.g realpath)

Note: You should also have about 50 Gbytes of free disk space for building images.

The essential packages you need for a supported Ubuntu or Debian distribution are shown in the following command:

Repo Setup

In order to use Yocto build system, the repo tool must be properly installed on the machine.

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