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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
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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

Utilizing a development shell

A development shell can be a helpful tool when editing packages or debugging build failures. The following steps take place when we use devshell:

  1. Source files are extracted into the working directory.
  2. Patches are applied.
  3. A new terminal is opened in the working directory.

All the environment variables needed for the build are available in the new terminal, so we can use commands such as configure and make. The commands execute just as if the build system were running them.

The following command is an example that uses devshell on a target named linux-yocto:

Figure 10.9 – Running devshell for the linux-yocto recipe

Figure 10.9 – Running devshell for the linux-yocto recipe

The command from Figure 10.9 allows us to rework the Linux kernel source code, build it, and change its code as needed. In Figure 10.10, you can see the log after executing the bitbake linux-yocto -c devshell command:

Figure 10.10 – The log for bitbake linux-yocto -c devshell

Figure 10.10 – The log for bitbake...

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