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)

Tracking image, package, and SDK contents

The easiest way to ensure we have the image, packages, and software development kit (SDK), along with the expected contents, is to use the buildhistory mechanism.

When a recipe is updated for a new version or has its code changed, it may influence the contents of the generated packages and, consequently, the image or SDK.

Poky deals with many recipes and images or SDKs frequently have tens or hundreds of packages. Therefore, it may be challenging to track the package contents. The Poky tool that helps in this task is buildhistory.

buildhistory, as the name suggests, keeps a history of the contents of several artifacts built during the use of Poky. It tracks package, image, and SDK building and their contents.

To enable buildhistory in our system, we need to add the following lines of code in our build/conf/local.conf file:

Figure 10.1 – How to enable buildhistory support

Figure 10.1 – How to enable buildhistory support

The INHERIT method includes...