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)

Using Poky to achieve copyleft compliance

At this point, we know how to use Poky and understand its main goal. It is time to understand the legal aspects of producing a Linux-based system that uses packages under different licenses.

We can configure Poky to generate the artifacts that should be shared as part of the copyleft compliance process.

Understanding license auditing

To help us achieve copyleft compliance, Poky generates a license manifest during the image build, located at build/tmp/deploy/licenses/<image_name-machine_name>-<datastamp>/.

To demonstrate this process, we will use the core-image-full-cmdline image for the qemux86-64 machine. To start with our example, look at the files under build/tmp/deploy/licenses/core-image-full-cmdline-qemux86-64-<datastamp>, which are as follows:

  • image_license.manifest: This lists the recipe names, versions, licenses, and the packages files available in build/tmp/deploy/image/<machine> but not...