Book Image

Embedded Linux Development Using Yocto Project Cookbook - Second Edition

By : Alex Gonzalez
Book Image

Embedded Linux Development Using Yocto Project Cookbook - Second Edition

By: Alex Gonzalez

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 (13 chapters)
Title Page
Packt Upsell

Integrating the Open Java Development Kit

Up until Java SE version 8, Oracle offered a commercially-licensed and royalties-based Java SE embedded edition. However, Java SE Embedded 8 was the last embedded specific Java SE release that Oracle will offer.

The open source alternative to Oracle Java SE embedded is the Open Java Development Kit (OpenJDK), an open source implementation of Java SE licensed under the GPLv2, with the classpath exception, which means that applications are allowed to link without being bound by the GPL license. This recipe will show how to build OpenJDK with Yocto and integrate the Java Runtime Environment (JRE) into our target images.

Getting ready

The main components of OpenJDK are:

  • The HotSpot Java Virtual Machine (JVM)
  • The Java Class Library (JCL)
  • The Java compiler, javac

Initially, OpenJDK needed to be built using a proprietary JDK. However, the IcedTea project allowed us to build OpenJDK using the GNU classpath, the GNU Compiler for Java (GCJ), and bootstrap a JDK to...