Book Image

Yocto for Raspberry Pi

By : TEXIER Pierre-Jean, Petter Mabäcker
Book Image

Yocto for Raspberry Pi

By: TEXIER Pierre-Jean, Petter 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 (18 chapters)
Yocto for Raspberry Pi
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
3
Mastering Baking with Hob and Toaster

Creating a packet list for your image


One of the reasons you would want to create a customized image is that you often require a different set of packages than those used in existing images. When using the Yocto Project, it's possible to use a sort of package list, to make it easier for the end user to add new packages and to keep the image recipe as simple as possible. This section will guide your through how to use a customized package list using the Yocto Project.

Setting up a customized package list

First, you need to add a new BitBake file (.bb) named packagegroup-packt-iot.bb:

$ mkdir recipes-core/images/packagegroups
$ touch  packagegroup-packt-iot.bb

A typical package list will look something like this:

$ cat packagegroup-packt-iot.bb
DESCRIPTION = "Package list for packt-iot-image"
LICENSE = "MIT"
inherit packagegroup
RDEPENDS_${PN} += " \
pkg1 \
pkg2 \
pkg3 \
"

Start using a customized package list in meta-packt-iot

When our customized package list is in place, we can transfer packages...