Embedded Linux Projects Using Yocto Project Cookbook

Book Image

Embedded Linux Projects Using Yocto Project Cookbook

By : Alex Gonzalez

Book Image

Embedded Linux Projects Using Yocto Project Cookbook

By: Alex Gonzalez

Overview of this book

Embedded Linux Projects Using Yocto Project Cookbook

Embedded Linux Projects Using Yocto Project Cookbook

Credits

Foreword

About the Author

About the Author

About the Reviewers

About the Reviewers

www.PacktPub.com

www.PacktPub.com

Preface

Free Chapter

The Build System

The Build System

Setting up the host system

Installing Poky

Creating a build directory

Building your first image

Explaining the Freescale Yocto ecosystem

Installing support for Freescale hardware

Building Wandboard images

Troubleshooting your Wandboard's first boot

Configuring network booting for a development setup

Sharing downloads

Sharing the shared state cache

Setting up a package feed

Using build history

Working with build statistics

Debugging the build system

The BSP Layer

Creating a custom BSP layer

Introducing system development workflows

Adding a custom kernel and bootloader

Building the U-Boot bootloader

Explaining Yocto's Linux kernel support

Describing Linux's build system

Configuring the Linux kernel

Building the Linux kernel

Building external kernel modules

Debugging the Linux kernel and modules

Debugging the Linux kernel booting process

Using the kernel function tracing system

Managing the device tree

Debugging device tree issues

The Software Layer

The Software Layer

Exploring an image's contents

Adding a new software layer

Selecting a specific package version and providers

Adding supported packages

Adding new packages

Adding data, scripts, or configuration files

Managing users and groups

Using the sysvinit initialization manager

Using the systemd initialization manager

Installing package-installation scripts

Reducing the Linux kernel image size

Reducing the root filesystem image size

Releasing software

Analyzing your system for compliance

Working with open source and proprietary code

Application Development

Application Development

Introducing toolchains

Preparing and using an SDK

Using the Application Development Toolkit

Using the Eclipse IDE

Developing GTK+ applications

Using the Qt Creator IDE

Developing Qt applications

Describing workflows for application development

Working with GNU make

Working with the GNU build system

Working with the CMake build system

Working with the SCons builder

Developing with libraries

Working with the Linux framebuffer

Using the X Windows system

Adding Python applications

Integrating the Oracle Java Runtime Environment

Integrating the Open Java Development Kit

Integrating Java applications

Debugging, Tracing, and Profiling

Debugging, Tracing, and Profiling

Analyzing core dumps

Native GDB debugging

Cross GDB debugging

Using strace for application debugging

Using the kernel's performance counters

Using static kernel tracing

Using dynamic kernel tracing

Using dynamic kernel events

Exploring Yocto's tracing and profiling tools

Tracing and profiling with perf

Using SystemTap

Index

Customer Reviews

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Describing workflows for application development

The workflows for application development are similar to the ones we already saw for U-Boot and the Linux kernel back in Chapter 2, The BSP Layer.

How to do it...

We will see how the following development workflows are applied to application development:

External development
Working directory development
External source development

How it works...

External development

This is what we have been using on the recipes we saw before when building from the command line using a standalone toolchain, and also when using both the Eclipse and Qt Creator IDEs. This workflow produces binaries that have to be individually copied to the hardware to run and debug. It can be used in conjunction with the other workflows.

Working directory development

When the application is being built by the Yocto build system, we use this workflow to debug sporadic problems. However, it is not the recommended workflow for long developments. Note, though, that it is usually the first...