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Embedded Linux Development using Yocto Projects

You're reading from Embedded Linux Development using Yocto Projects Learn to leverage the power of Yocto Project to build efficient Linux-based products

Product type Paperback

Published in Nov 2017

Publisher

ISBN-13 9781788470469

Length 162 pages

Edition 2nd Edition

Tools

Linux

Concepts

Embedded Systems

Authors (2):

Otavio Salvador

Daiane Angolini

View More author details

Table of Contents (15) Chapters

Preface

1. Meeting the Yocto Project FREE CHAPTER

2. Baking Our Poky-Based System

3. Using Toaster to Bake an Image

4. Grasping the BitBake Tool

5. Detailing the Temporary Build Directory

6. Assimilating Packaging Support

7. Diving into BitBake Metadata

8. Developing with the Yocto Project

9. Debugging with the Yocto Project

10. Exploring External Layers

11. Creating Custom Layers

12. Customizing Existing Recipes

13. Achieving GPL Compliance

14. Booting Our Custom Embedded Linux

Fetching the source code

When the Poky source code is downloaded, what is actually copied is the metadata and the BitBake tool. Additional source code is fetched on demand. One of the main features supported by BitBake is source code fetching.

This support has been designed to be as modular and as flexible as possible. Every Linux-based system includes the Linux kernel and several other utilities that form the root filesystem, such as OpenSSH or a Linux kernel.

The OpenSSH source code is available from its upstream website as a tar.gz file hosted on an HTTP server, while the Linux kernel release is usually hosted on a Git repository, and those two different source codes can easily be fetched by BitBake.

BitBake offers support for many different fetcher modules that allow the retrieval of tarball files and a number of other protocols, such as Git, Subversion, Bazaar, OSC, HTTP, HTTPS, FTP, CVS, Mercurial, Perforce, and SSH.

The mechanism used by BitBake to fetch the source code is internally...

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Authors (2)

Otavio Salvador

Otavio Salvador

Otavio Salvador loves technology and started his free software activities in 1999. In 2002, he founded O.S. Systems, a company focused on embedded system development services and consultancy worldwide, creating and maintaining customized BSPs, and helping companies with their product developments challenges. This resulted in his joining the OpenEmbedded community in 2008, when he became an active contributor to the OpenEmbedded project.

See other products by Otavio Salvador

Angolini

Angolini

Daiane Angolini has been working with embedded Linux since 2008. She has been working as an application engineer at NXP, acting on internal development, porting custom applications from Android, and on-site customer support for i.MX architectures in areas such as the Linux kernel, u-boot, Android, Yocto Project, and user-space applications. However, it was on the Yocto Project that she found her place.

See other products by Angolini

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