Book Image

Embedded Linux Development using Yocto Projects - Second Edition

By : Otavio Salvador, Daiane Angolini
Book Image

Embedded Linux Development using Yocto Projects - Second Edition

By: Otavio Salvador, Daiane Angolini

Overview of this book

Yocto Project is turning out to be the best integration framework for creating reliable embedded Linux projects. It has the edge over other frameworks because of its features such as less development time and improved reliability and robustness. Embedded Linux Development using Yocto Project starts with an in-depth explanation of all Yocto Project tools, to help you perform different Linux-based tasks. The book then moves on to in-depth explanations of Poky and BitBake. It also includes some practical use cases for building a Linux subsystem project using Yocto Project tools available for embedded Linux. The book also covers topics such as SDK, recipetool, and others. By the end of the book, you will have learned how to generate and run an image for real hardware boards and will have gained hands-on experience at building efficient Linux systems using Yocto Project.
Table of Contents (22 chapters)
Title Page
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface
7
Diving into BitBake Metadata
Index

Baking for the hardware


After discovering the BSP layer for the hardware we are going to use for the build, we need to download all of the needed meta layers and create the build environment.

Before starting this, we need to make sure all system requirements are met. We discussed these requirements in Chapter 2, Baking Our Poky-Based System.

The use of meta layers forces us to deal with many Git repositories of metadata. One good way to avoid confusion is putting all of the sources related to those meta layers in a specific directory. The following figure shows an example of this:

It is advisable to keep the layers inside the sources up to date, as it brings security fixes, bug fixes, and new features.

Note

There are multiple ways of managing the multiple layers when making a product. One option is to use the combo-layer (https://wiki.yoctoproject.org/wiki/Combo-layer), which replicates the commits onto a single Git tree, as well as git submodules and repo to manage multiple Git repositories...