Book Image

Embedded Linux Development Using Yocto Project - Third Edition

By : Otavio Salvador, Daiane Angolini
Book Image

Embedded Linux Development Using Yocto Project - Third Edition

By: Otavio Salvador, Daiane Angolini

Overview of this book

The Yocto Project is the industry standard for developing dependable embedded Linux projects. It stands out from other frameworks by offering time-efficient development with enhanced reliability and robustness. With Embedded Linux Development Using Yocto Project, you’ll acquire an understanding of Yocto Project tools, helping you perform different Linux-based tasks. You’ll gain a deep understanding of Poky and BitBake, explore practical use cases for building a Linux subsystem project, employ Yocto Project tools available for embedded Linux, and uncover the secrets of SDK, recipe tool, and others. This new edition is aligned with the latest long-term support release of the aforementioned technologies and introduces two new chapters, covering optimal emulation in QEMU for faster product development and best practices. By the end of this book, you’ll be well-equipped to generate and run an image for real hardware boards. You’ll gain hands-on experience in building efficient Linux systems using the Yocto Project.
Table of Contents (20 chapters)

Detailing a layer’s source code

Usually, a layer has a directory tree, as shown in the following screenshot:

Figure 11.2 – The standard layer layout

Figure 11.2 – The standard layer layout

Inside this directory are two files, <layer>/COPYING and <layer>/README, a license and a message to a user respectively. In <layer>/README, we must specify any other dependency and information that the layer’s users need to know. The meta- prefix for the layer is not a requirement but a commonly used naming convention.

The classes folder should hold the classes specific to that layer (the .bbclass files). It is an optional directory.

The <layer>/conf folder is mandatory and should provide the configuration files (the .conf files). The layer configuration file, <layer>/conf/layer.conf, which will be covered in detail in the next chapter, is the file with the layer definition.

An example of the directory layout of the <layer>/conf folder is shown...