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Learning Embedded Linux using the Yocto Project

You're reading from   Learning Embedded Linux using the Yocto Project Develop powerful embedded Linux systems with the Yocto Project components

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Product type Paperback
Published in Jun 2015
Publisher
ISBN-13 9781784397395
Length 334 pages
Edition 1st Edition
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Author (1):
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Alexandru Vaduva Alexandru Vaduva
Author Profile Icon Alexandru Vaduva
Alexandru Vaduva
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Table of Contents (20) Chapters Close

Learning Embedded Linux Using the Yocto Project
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface
1. Introduction 2. Cross-compiling FREE CHAPTER 3. Bootloaders 4. Linux Kernel 5. The Linux Root Filesystem 6. Components of the Yocto Project 7. ADT Eclipse Plug-ins 8. Hob, Toaster, and Autobuilder 9. Wic and Other Tools 10. Real-time 11. Security 12. Virtualization 13. CGL and LSB Index

The Yocto Project reference


Moving on to the Yocto Project, we have recipes available for every kernel version available inside the BSP support for each supported board, and recipes for kernel modules that are built outside the Linux kernel source tree.

The Atmel SAMA5D3-Xplained board uses the linux-yocto-custom kernel. This is defined inside the conf/machine/sama5d3-xplained.conf machine configuration file using the PREFERRED_PROVIDER_virtual/kernel variable. No PREFERRED_VERSION is mentioned, so the latest version is preferred; in this case, we are talking about the linux-yocto-custom_3.10.bb recipe.

The linux-yocto-custom_3.10.bb recipe fetches the kernel sources available inside Linux Torvalds' git repository. After a quick look at the sources once the do_fetch task is finished, it can be observed that the Atmel repository was, in fact, fetched. The answer is available inside the linux-yocto-custom_3.10.bbappend file, which offers another SR_URI location. Other useful information you...

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