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Yocto for Raspberry Pi

Yocto for Raspberry Pi

By : Pierre-Jean, Mabäcker
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Yocto for Raspberry Pi

Yocto for Raspberry Pi

2 (4)
By: Pierre-Jean, Mabäcker

Overview of this book

The Yocto Project is a Linux Foundation workgroup, which produces tools (SDK) and processes (configuration, compilation, installation) that will enable the creation of Linux distributions for embedded software, independent of the architecture of embedded software (Raspberry Pi, i.MX6, and so on). It is a powerful build system that allows you to master your personal or professional development. This book presents you with the configuration of the Yocto Framework for the Raspberry Pi, allowing you to create amazing and innovative projects using the Yocto/ OpenEmbedded eco-system. It starts with the basic introduction of Yocto's build system, and takes you through the setup and deployment steps for Yocto. It then helps you to develop an understanding of Bitbake (the task scheduler), and learn how to create a basic recipe through a GPIO application example. You can then explore the different types of Yocto recipe elements (LICENSE, FILES, SRC_URI, and so on). Next, you will learn how to customize existing recipes in Yocto/OE layers and add layers to your custom environment (qt5 for example).
Table of Contents (13 chapters)
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3
3. Mastering Baking with Hob and Toaster

Software development kits (SDKs)

An SDK is a set of tools we can use outside Yocto/OE. These tools generally include a compiler, linker, debugger, libraries, and external headers. This set of compilation tools is called a toolchain. With the Raspberry Pi (or other embedded platforms), the toolchain is often composed of crosstools, which are tools executed on one architecture that produce a binary for use in another architecture.

The following figure depicts the process of cross-compilation:

Software development kits (SDKs)

The Yocto/OE build system can be used to generate a cross-compilation toolchain and matching sysroot folder for a target system.

Note

The sysroot folder contains the shared libraries, headers, and utilities that are used in the process of building recipes,

With this build system, there are several ways of generating an SDK that conforms to our Raspberry Pi platform.

A generic SDK - meta-toolchain

The meta-toolchain recipe will build a toolchain that matches the Raspberry Pi platform and a basic sysroot...

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