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)

Parsing metadata

Usually, our projects include multiple layers that provide different metadata to fulfill specific needs. For example, when we initialize a build directory, using source oe-init-build-env build, a set of files is generated as follows:

Figure 5.1 – A list of files created with source oe-init-build-env build

Figure 5.1 – A list of files created with source oe-init-build-env build

The build/conf/templateconf.cfg file points to the directory used as the template to create the build/conf directory.

Note

A user can provide a different template directory using the TEMPLATECONF environment variable – for example, TEMPLATECONF=/some/dir source oe-init-build-env build.

The build/conf/local.conf file is the placeholder for the local configurations. We used this file in Chapter 2, Baking Our First Poky-Based System, and we will use it throughout this book.

BitBake uses the build/conf/bblayers.conf file to list the layers considered in the build environment. An example is as follows:

...