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  • Book Overview & Buying Embedded Linux Development Using Yocto Project Cookbook
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Embedded Linux Development Using Yocto Project Cookbook

Embedded Linux Development Using Yocto Project Cookbook - Second Edition

By : Alex González
3.8 (8)
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Embedded Linux Development Using Yocto Project Cookbook

Embedded Linux Development Using Yocto Project Cookbook

3.8 (8)
By: Alex González
Buy this Book

Overview of this book

The Yocto Project has become the de facto distribution build framework for reliable and robust embedded systems with a reduced time to market.You'll get started by working on a build system where you set up Yocto, create a build directory, and learn how to debug it. Then, you'll explore everything about the BSP layer, from creating a custom layer to debugging device tree issues. In addition to this, you’ll learn how to add a new software layer, packages, data, scripts, and configuration files to your system. You will then cover topics based on application development, such as using the Software Development Kit and how to use the Yocto project in various development environments. Toward the end, you will learn how to debug, trace, and profile a running system. This second edition has been updated to include new content based on the latest Yocto release.
Table of Contents (7 chapters)
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Preface
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Preface
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Who this book is for
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What this book covers
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To get the most out of this book
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Get in touch
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1
The Build System
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The Build System
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Introduction
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Setting up the host system
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Installing Poky
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Creating a build directory
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Building your first image
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Explaining the NXP Yocto ecosystem
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Installing support for NXP hardware
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Building Wandboard images
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Using the Toaster web interface
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Running a Toaster Docker container
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Configuring network booting for a development setup
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Using Docker as a Yocto build system container
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Sharing downloads
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Sharing the shared state cache
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Setting up a package feed
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Using build history
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Working with build statistics
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Debugging the build system
2
The BSP Layer
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The BSP Layer
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Introduction
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Creating a custom BSP layer
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Adding a custom kernel and bootloader
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Building the U-Boot bootloader
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Describing Linux's build system
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Configuring the Linux kernel
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Building the Linux kernel
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Building external kernel modules
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Debugging the Linux kernel and modules
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Debugging the Linux kernel booting process
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Using the kernel function tracing system
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Managing the device tree
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Debugging device tree issues
3
The Software Layer
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The Software Layer
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Introduction
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Exploring an image's contents
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Adding a new software layer
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Selecting a specific package version and provider
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Adding supported packages
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Adding new packages
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Adding data, scripts, or configuration files
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Managing users and groups
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Using the sysvinit initialization manager
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Using the systemd initialization manager
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Installing package installation scripts
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Reducing the Linux kernel image size
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Reducing the root filesystem size
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Memory-based root filesystems
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Securing the root filesystem
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Releasing software
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Analyzing your system for compliance
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Working with open source and proprietary code
4
Application Development
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Application Development
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Introduction
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Introducing toolchains
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Preparing an SDK
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Using the extensible SDK
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Using the Eclipse IDE
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Developing GTK+ applications
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Using the Qt Creator IDE
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Developing Qt applications
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Describing workflows for application development
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Working with GNU make
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Working with the GNU build system
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Working with the CMake build system
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Working with the SCons builder
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Developing with libraries
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Working with the Linux framebuffer
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Using the X Windows system
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Using Wayland
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Adding a web browser application
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Adding Python applications
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Integrating the Open Java Development Kit
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Integrating Java applications
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Integrating Node.js applications
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Running Docker application containers
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Debugging, Tracing, and Profiling
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Debugging, Tracing, and Profiling
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Introduction
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Analyzing core dumps
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Native GDB debugging
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Cross GDB debugging
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Using strace for application debugging
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Using the kernel's performance counters
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Using static kernel tracing
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Using dynamic kernel tracing
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Using dynamic kernel events
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Exploring Yocto's tracing and profiling tools
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Tracing and profiling with perf
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Using SystemTap
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Using LTTng
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Using blktrace
6
Other Books You May Enjoy
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Other Books You May Enjoy
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Leave a review - let other readers know what you think

Adding a custom kernel and bootloader

The BSP that encapsulates the hardware modifications for a given platform is mostly located in the bootloader, usually U-Boot (Das U-Boot) for ARM devices, and the Linux kernel. Both U-Boot and the Linux kernel have upstream development trees, at git.denx.de and http://kernel.org/ respectively, but it is very common for manufacturers of embedded hardware to provide their own trees for both bootloader and kernel.

Development in U-Boot and the Linux kernel is usually done externally to Yocto, as they are easy and quicker to build using a cross-compilation toolchain, like the one provided by Yocto's SDK.

The development work is then integrated into Yocto in one of two ways:

  • With patches added to the kernel and U-Boot bbappend files. This method will build the same source as the reference design board we are using as a base, and apply our changes over it. This is what we have seen in the previous recipe.
  • Using a different Git repository, forked from the Linux...
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Embedded Linux Development Using Yocto Project Cookbook
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