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Embedded Linux Development Using Yocto Project

You're reading from   Embedded Linux Development Using Yocto Project Leverage the power of the Yocto Project to build efficient Linux-based products

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Product type Paperback
Published in Apr 2023
Publisher Packt
ISBN-13 9781804615065
Length 196 pages
Edition 3rd Edition
Tools
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Authors (2):
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Otavio Salvador Otavio Salvador
Author Profile Icon Otavio Salvador
Otavio Salvador
Daiane Angolini Daiane Angolini
Author Profile Icon Daiane Angolini
Daiane Angolini
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Toc

Table of Contents (20) Chapters Close

Preface 1. Chapter 1: Meeting the Yocto Project 2. Chapter 2: Baking Our First Poky-Based System FREE CHAPTER 3. Chapter 3: Using Toaster to Bake an Image 4. Chapter 4: Meeting the BitBake Tool 5. Chapter 5: Grasping the BitBake Tool 6. Chapter 6: Detailing the Temporary Build Directory 7. Chapter 7: Assimilating Packaging Support 8. Chapter 8: Diving into BitBake Metadata 9. Chapter 9: Developing with the Yocto Project 10. Chapter 10: Debugging with the Yocto Project 11. Chapter 11: Exploring External Layers 12. Chapter 12: Creating Custom Layers 13. Chapter 13: Customizing Existing Recipes 14. Chapter 14: Achieving GPL Compliance 15. Chapter 15: Booting Our Custom Embedded Linux 16. Chapter 16: Speeding Up Product Development through Emulation – QEMU 17. Chapter 17: Best Practices 18. Index 19. Other Books You May Enjoy

Fetching the source code

When we download the Poky source code, we download the metadata collection and the BitBake tool. One of the main features supported by BitBake is additional source code fetching.

The ability of fetching external source code is as modular and flexible as possible. For example, every Linux-based system includes the Linux kernel and several other utilities that form the root filesystem, such as OpenSSH or BusyBox.

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 in a Git repository. Therefore, BitBake can easily fetch those two different instances of source code.

BitBake offers support for many different fetcher modules that allow the retrieval of tarball files and several other SCM systems, such as the following:

  • Amazon AWS S3
  • Android repo
  • Azure Storage
  • Bazaar
  • ClearCase
  • CVS
  • FTP
  • Git
  • Git Annex
  • Git submodules
  • HTTP(S...
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