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)

Understanding the work directory

The build/tmp/work directory is organized by architecture. For example, when working with the qemux86-64 machine, we have the following four directories:

Figure 6.2 – The contents of the build/tmp/work directory

Figure 6.2 – The contents of the build/tmp/work directory

Figure 6.2 shows an example of possible directories under build/tmp/work for an x86-64 host and a qemux86-64 target. They are architecture- and machine-dependent, as follows:

  • all-poky-linux: This directory contains the working build directories for the architecture-agnostic packages. These are mostly scripts or interpreted language-based packages, for example, Perl scripts and Python scripts.
  • core2-64-poky-linux: This directory contains the working build directories for the packages common to x86-64-based targets using the optimization tuned for core2-64.
  • qemux86_64-poky-linux: This directory contains the working build directories for packages specific to the qemux86-64 machine.
  • x86_64...