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)

Adding extra files to the existing packages

If we need to include an additional configuration file, we should use FILESEXTRAPATHS, as explained in the previous example and shown in the following lines of code:

Figure 13.5 – The content of the .bbappend file to install a new configuration file

Figure 13.5 – The content of the .bbappend file to install a new configuration file

The do_install:append function appends the provided block below the metadata already available in the original do_install function. It includes the command to copy our new configuration file into the package’s filesystem. The file is copied from ${WORKDIR} to ${D} as these are the directories used by Poky to build the package and the destination directory used by Poky to create the package.

There are many variables to define paths in our recipes, such as bindir, datadir, and sysconfdir. The poky/meta/conf/bitbake.conf file defines all those commonly used variables. The variables exist, so the installation paths of binaries can be customized depending...