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)

Package feeds

As discussed in Chapter 5, Grasping the BitBake Tool, packages play a vital role, as images and Software Development Kits (SDKs) rely on them. In fact, do_rootfs uses a local repository to fetch binary packages when generating those artifacts. This repository is known as a package feed.

There is no reason for this repository to be used just for the images or SDK build steps. Several valid reasons exist for making this repository remotely accessible, either internally in our development environment or publicly. Some of these reasons are as follows:

  • You can easily test an updated application during the development stage, without requiring a complete system re-installation
  • You can make additional packages more flexible so that they can be installed in a running image
  • You can update products in the field

To produce a solid package feed, we must ensure that we have consistent increments in the package revision every time the package is changed. It...