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Embedded Linux Development with Yocto Project

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Embedded Linux Development with Yocto Project

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Embedded Linux Development with Yocto Project
Jul, 2014 | 142 pages
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Table of Contents (22 chapters)
Embedded Linux Development with Yocto Project
Embedded Linux Development with Yocto Project
Credits
Credits
About the Authors
About the Authors
About the Reviewers
About the Reviewers
www.PacktPub.com
www.PacktPub.com
Preface
Preface
Free Chapter
1
Meeting the Yocto Project
Meeting the Yocto Project
What is the Yocto Project?
Delineating the Yocto Project
Understanding Poky
The alliance of OpenEmbedded Project and Yocto Project
Summary
2
Baking Our Poky-based System
Baking Our Poky-based System
Configuring a host system
Downloading the Poky source code
Preparing the build environment
Knowing the local.conf file
Building a target image
Running images in QEMU
Summary
3
Using Hob to Bake an Image
Using Hob to Bake an Image
Building an image using Hob
Customizing an image with Hob
Summary
4
Grasping the BitBake Tool
Grasping the BitBake Tool
Understanding the BitBake tool
Exploring metadata
Parsing metadata
Dependencies
Preferring and providing recipes
Fetching the source code
Understanding BitBake's tasks
Generating a root filesystem image
Summary
5
Detailing the Temporary Build Directory
Detailing the Temporary Build Directory
Detailing the build directory
Constructing the build directory
Exploring the temporary build directory
Understanding the work directory
Understanding the sysroot directories
Summary
6
Assimilating Packaging Support
Assimilating Packaging Support
Using supported package formats
Understanding shared state cache
Explaining package versioning
Package feeds
Summary
7
Diving into BitBake Metadata
Diving into BitBake Metadata
Using metadata
Working with metadata
Summary
8
Developing with the Yocto Project
Developing with the Yocto Project
Deciphering the software development kit
Working with the Poky SDK
Developing applications on the target
Integrating with Eclipse
Summary
9
Debugging with the Yocto Project
Debugging with the Yocto Project
Differentiating metadata and application debugging
Tracking image, package, and SDK contents
Debugging packaging
Logging information during task execution
Utilizing a development shell
Using the GNU Project Debugger for debugging
Summary
10
Exploring External Layers
Exploring External Layers
Powering flexibility with layers
Detailing the layer's source code
Adding meta layers
Summary
11
Creating Custom Layers
Creating Custom Layers
Making a new layer
Adding metadata to the layer
Creating an image
Adding a package recipe
Writing a machine definition
Using a custom distribution
Machine features versus distro features
Understanding the variables scope
Summary
12
Customizing Existing Recipes
Customizing Existing Recipes
Common use cases
Adding extra options to recipes based on Autoconf
Applying a patch
Adding extra files to the existing packages
Changing recipe feature configuration
Customizing BusyBox
Customizing the linux-yocto framework
Summary
13
Achieving GPL Compliance
Achieving GPL Compliance
Understanding copyleft
Managing software licensing with Poky
Using Poky to achieve copyleft compliance
Summary
14
Booting Our Custom Embedded Linux
Booting Our Custom Embedded Linux
Exploring the Wandboard
Discovering Freescale ARM BSP
Using Wandboard with the Yocto Project
Building an image for Wandboard
Booting Wandboard from the SD card
Summary
References
References
Index
Index

Chapter 5. Detailing the Temporary Build Directory

In this chapter, we will understand the contents of the temporary build directory after a complete image generation and see how BitBake uses it in the baking process. We will learn how some of these directories can assist our understanding when things do not work as expected, providing a valuable source of information.

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