7.1 Core Images-Linux Distribution Blueprints In this chapter, we focus on customizing Linux OS stacks with user space libraries and applications from recipes provided by the Yocto Project and other compatible layers from the OpenEmbedded project. While bootloader and the Linux kernel are indispensable for a working Linux OS stack, user space makes up its majority. You may want to refer to Chapter 5, “Troubleshooting,” for the debugging tools to help you track down build failures.Ĭhapter 6, “Linux System Architecture,” outlined the building blocks of a Linux distribution.
They can occur for various reasons, and troubleshooting can be challenging. When experimenting with the Yocto Project, you eventually encounter build failures. Referring to Chapter 4, you find syntax examples and explanations. While the syntax is mostly straightforward and resembles typical scripting languages, there are some constructs that are particular to BitBake. This and following chapters show examples or snippets of BitBake recipes utilizing that syntax. In Chapter 3, “OpenEmbedded Build System,” and Chapter 4, “BitBake Build Engine,” we explained the OpenEmbedded build system and the BitBake syntax.
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It also downloads the majority of the source code packages and establishes a shared state cache, both of which speed up build time for the examples presented in this chapter. Performing a build using Poky’s default settings validates your setup. If you have not yet prepared your build system, we recommend that you go back to Chapter 2 and follow the steps. In this chapter, we reuse that build environment.
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Now it is time that we put that knowledge to work.Ĭhapter 2, “The Yocto Project,” outlined the prerequisites for the build system and how to set up your build host, configure a build environment, and launch a build that creates a system ready to run in the QEMU emulator. In the preceding chapters, we laid the foundation for using the Yocto Project tools to build custom Linux distributions.
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