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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

Understanding the sysroot directories

The sysroot directory plays a critical role in the Yocto Project. It creates an individual and isolated environment for each recipe. This environment, set for each recipe, is essential to ensure reproducibility and avoid contamination with the host machine’s packages.

After we build the procps recipe, version 3.3.17, we get two sets of sysroot directories – recipes-sysroot and recipes-sysroot-native.

Inside each sysroot set, there is a sub-directory called sysroot-provides. This directory lists the packages installed on each respective sysroot. Following is the recipe-sysroot directory:

Figure 6.5 – Content of the recipe-sysroot directory under build/tmp/work for recipe procps

Figure 6.5 – Content of the recipe-sysroot directory under build/tmp/work for recipe procps

The recipe-sysroot-native directory includes the build dependencies used on the host system during the build process. It encompasses the compiler, linker, tools, and more. At the same time, the recipe-sysroot directory...

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