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  • Book Overview & Buying Embedded Linux Development with Yocto Project
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Embedded Linux Development with Yocto Project

Embedded Linux Development with Yocto Project

By : Otavio Salvador
3.9 (20)
Buy this Book
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Embedded Linux Development with Yocto Project

Embedded Linux Development with Yocto Project

3.9 (20)
By: Otavio Salvador
Buy this Book

Overview of this book

A practical tutorial guide which introduces you to the basics of Yocto Project, and also helps you with its real hardware use to boost your Embedded Linux-based project. If you are an embedded systems enthusiast and willing to learn about compelling features offered by the Yocto Project, then this book is for you. With prior experience in the embedded Linux domain, you can make the most of this book to efficiently create custom Linux-based systems.
Table of Contents (17 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
Free Chapter
1
1. Meeting the Yocto Project
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1. Meeting the Yocto Project
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What is the Yocto Project?
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Delineating the Yocto Project
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Understanding Poky
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The alliance of OpenEmbedded Project and Yocto Project
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Summary
2
2. Baking Our Poky-based System
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2. Baking Our Poky-based System
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Configuring a host system
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Downloading the Poky source code
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Preparing the build environment
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Knowing the local.conf file
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Building a target image
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Running images in QEMU
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Summary
3
3. Using Hob to Bake an Image
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3. Using Hob to Bake an Image
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Building an image using Hob
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Customizing an image with Hob
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Summary
4
4. Grasping the BitBake Tool
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4. Grasping the BitBake Tool
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Understanding the BitBake tool
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Exploring metadata
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Parsing metadata
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Dependencies
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Preferring and providing recipes
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Fetching the source code
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Understanding BitBake's tasks
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Generating a root filesystem image
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Summary
5
5. Detailing the Temporary Build Directory
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5. Detailing the Temporary Build Directory
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Detailing the build directory
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Constructing the build directory
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Exploring the temporary build directory
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Understanding the work directory
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Understanding the sysroot directories
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Summary
6
6. Assimilating Packaging Support
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6. Assimilating Packaging Support
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Using supported package formats
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Understanding shared state cache
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Explaining package versioning
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Package feeds
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Summary
7
7. Diving into BitBake Metadata
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7. Diving into BitBake Metadata
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Using metadata
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Working with metadata
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Summary
8
8. Developing with the Yocto Project
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8. Developing with the Yocto Project
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Deciphering the software development kit
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Working with the Poky SDK
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Developing applications on the target
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Integrating with Eclipse
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Summary
9
9. Debugging with the Yocto Project
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9. Debugging with the Yocto Project
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Differentiating metadata and application debugging
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Tracking image, package, and SDK contents
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Debugging packaging
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Logging information during task execution
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Utilizing a development shell
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Using the GNU Project Debugger for debugging
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Summary
10
10. Exploring External Layers
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10. Exploring External Layers
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Powering flexibility with layers
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Detailing the layer's source code
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Adding meta layers
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Summary
11
11. Creating Custom Layers
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11. Creating Custom Layers
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Making a new layer
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Adding metadata to the layer
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Creating an image
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Adding a package recipe
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Writing a machine definition
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Using a custom distribution
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Machine features versus distro features
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Understanding the variables scope
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Summary
12
12. Customizing Existing Recipes
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12. Customizing Existing Recipes
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Common use cases
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Adding extra options to recipes based on Autoconf
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Applying a patch
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Adding extra files to the existing packages
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Changing recipe feature configuration
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Customizing BusyBox
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Customizing the linux-yocto framework
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Summary
13
13. Achieving GPL Compliance
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13. Achieving GPL Compliance
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Understanding copyleft
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Managing software licensing with Poky
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Using Poky to achieve copyleft compliance
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Summary
14
14. Booting Our Custom Embedded Linux
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14. Booting Our Custom Embedded Linux
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Exploring the Wandboard
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Discovering Freescale ARM BSP
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Using Wandboard with the Yocto Project
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Building an image for Wandboard
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Booting Wandboard from the SD card
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Summary
15
A. References
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A. References
16
Index
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Index

Using supported package formats

The main goal of most of Poky's tasks is to produce packages. The other tasks use built packages to make other deliverables such as images and toolchains.

A recipe may generate one or more packages as a result of it being executed by BitBake; on the other hand, images and toolchains are made of several packages that are unpacked and configured to accomplish the intended goal. The generated result is wrapped in such a way that it can be installed into one or more images, or it can be deployed for later use.

List of supported package formats

Currently, BitBake supports four different package formats:

  • RPM: Originally named Red Hat Package Manager, but now known as the RPM package format since its adoption to several other Linux distributions, it is used by several popular Linux distributions such as SuSE, OpenSuSE, Red Hat, Fedora, CentOS, among others.

  • DEB: The Debian Package Manager is used by Debian and several other Debian-based distributions; the most widely...

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