|  | <!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" | 
|  | "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd" | 
|  | [<!ENTITY % poky SYSTEM "../poky.ent"> %poky; ] > | 
|  |  | 
|  | <chapter id='adt-intro'> | 
|  | <title>The Application Development Toolkit (ADT)</title> | 
|  |  | 
|  | <para> | 
|  | Part of the Yocto Project development solution is an Application Development | 
|  | Toolkit (ADT). | 
|  | The ADT provides you with a custom-built, cross-development | 
|  | platform suited for developing a user-targeted product application. | 
|  | </para> | 
|  |  | 
|  | <para> | 
|  | Fundamentally, the ADT consists of the following: | 
|  | <itemizedlist> | 
|  | <listitem><para>An architecture-specific cross-toolchain and matching | 
|  | sysroot both built by the | 
|  | <ulink url='&YOCTO_DOCS_DEV_URL;#build-system-term'>OpenEmbedded build system</ulink>. | 
|  | The toolchain and sysroot are based on a | 
|  | <ulink url='&YOCTO_DOCS_DEV_URL;#metadata'>Metadata</ulink> | 
|  | configuration and extensions, | 
|  | which allows you to cross-develop on the host machine for the target hardware. | 
|  | </para></listitem> | 
|  | <listitem><para>The Eclipse IDE Yocto Plug-in.</para></listitem> | 
|  | <listitem><para>The Quick EMUlator (QEMU), which lets you simulate target hardware. | 
|  | </para></listitem> | 
|  | <listitem><para>Various user-space tools that greatly enhance your application | 
|  | development experience.</para></listitem> | 
|  | </itemizedlist> | 
|  | </para> | 
|  |  | 
|  | <section id='the-cross-development-toolchain'> | 
|  | <title>The Cross-Development Toolchain</title> | 
|  |  | 
|  | <para> | 
|  | The | 
|  | <ulink url='&YOCTO_DOCS_DEV_URL;#cross-development-toolchain'>Cross-Development Toolchain</ulink> | 
|  | consists of a cross-compiler, cross-linker, and cross-debugger | 
|  | that are used to develop user-space applications for targeted | 
|  | hardware. | 
|  | This toolchain is created either by running the ADT Installer | 
|  | script, a toolchain installer script, or through a | 
|  | <ulink url='&YOCTO_DOCS_DEV_URL;#build-directory'>Build Directory</ulink> | 
|  | that is based on your Metadata configuration or extension for | 
|  | your targeted device. | 
|  | The cross-toolchain works with a matching target sysroot. | 
|  | </para> | 
|  | </section> | 
|  |  | 
|  | <section id='sysroot'> | 
|  | <title>Sysroot</title> | 
|  |  | 
|  | <para> | 
|  | The matching target sysroot contains needed headers and libraries for generating | 
|  | binaries that run on the target architecture. | 
|  | The sysroot is based on the target root filesystem image that is built by | 
|  | the OpenEmbedded build system and uses the same Metadata configuration | 
|  | used to build the cross-toolchain. | 
|  | </para> | 
|  | </section> | 
|  |  | 
|  | <section id='eclipse-overview'> | 
|  | <title>Eclipse Yocto Plug-in</title> | 
|  |  | 
|  | <para> | 
|  | The Eclipse IDE is a popular development environment and it fully supports | 
|  | development using the Yocto Project. | 
|  | When you install and configure the Eclipse Yocto Project Plug-in into | 
|  | the Eclipse IDE, you maximize your Yocto Project experience. | 
|  | Installing and configuring the Plug-in results in an environment that | 
|  | has extensions specifically designed to let you more easily develop software. | 
|  | These extensions allow for cross-compilation, deployment, and execution of | 
|  | your output into a QEMU emulation session. | 
|  | You can also perform cross-debugging and profiling. | 
|  | The environment also supports a suite of tools that allows you to perform | 
|  | remote profiling, tracing, collection of power data, collection of | 
|  | latency data, and collection of performance data. | 
|  | </para> | 
|  |  | 
|  | <para> | 
|  | For information about the application development workflow that uses the Eclipse | 
|  | IDE and for a detailed example of how to install and configure the Eclipse | 
|  | Yocto Project Plug-in, see the | 
|  | "<ulink url='&YOCTO_DOCS_DEV_URL;#adt-eclipse'>Working Within Eclipse</ulink>" section | 
|  | of the Yocto Project Development Manual. | 
|  | </para> | 
|  | </section> | 
|  |  | 
|  | <section id='the-qemu-emulator'> | 
|  | <title>The QEMU Emulator</title> | 
|  |  | 
|  | <para> | 
|  | The QEMU emulator allows you to simulate your hardware while running your | 
|  | application or image. | 
|  | QEMU is made available a number of ways: | 
|  | <itemizedlist> | 
|  | <listitem><para> | 
|  | If you use the ADT Installer script to install ADT, you can | 
|  | specify whether or not to install QEMU. | 
|  | </para></listitem> | 
|  | <listitem><para> | 
|  | If you have cloned the <filename>poky</filename> Git | 
|  | repository to create a | 
|  | <ulink url='&YOCTO_DOCS_DEV_URL;#source-directory'>Source Directory</ulink> | 
|  | and you have sourced the environment setup script, QEMU is | 
|  | installed and automatically available. | 
|  | </para></listitem> | 
|  | <listitem><para> | 
|  | If you have downloaded a Yocto Project release and unpacked | 
|  | it to create a | 
|  | <ulink url='&YOCTO_DOCS_DEV_URL;#source-directory'>Source Directory</ulink> | 
|  | and you have sourced the environment setup script, QEMU is | 
|  | installed and automatically available. | 
|  | </para></listitem> | 
|  | <listitem><para> | 
|  | If you have installed the cross-toolchain tarball and you | 
|  | have sourced the toolchain's setup environment script, QEMU | 
|  | is also installed and automatically available. | 
|  | </para></listitem> | 
|  | </itemizedlist> | 
|  | </para> | 
|  | </section> | 
|  |  | 
|  | <section id='user-space-tools'> | 
|  | <title>User-Space Tools</title> | 
|  |  | 
|  | <para> | 
|  | User-space tools are included as part of the Yocto Project. | 
|  | You will find these tools helpful during development. | 
|  | The tools include LatencyTOP, PowerTOP, OProfile, Perf, SystemTap, and Lttng-ust. | 
|  | These tools are common development tools for the Linux platform. | 
|  | <itemizedlist> | 
|  | <listitem><para><emphasis>LatencyTOP:</emphasis> LatencyTOP focuses on latency | 
|  | that causes skips in audio, | 
|  | stutters in your desktop experience, or situations that overload your server | 
|  | even when you have plenty of CPU power left. | 
|  | </para></listitem> | 
|  | <listitem><para><emphasis>PowerTOP:</emphasis> Helps you determine what | 
|  | software is using the most power. | 
|  | You can find out more about PowerTOP at | 
|  | <ulink url='https://01.org/powertop/'></ulink>.</para></listitem> | 
|  | <listitem><para><emphasis>OProfile:</emphasis> A system-wide profiler for Linux | 
|  | systems that is capable of profiling all running code at low overhead. | 
|  | You can find out more about OProfile at | 
|  | <ulink url='http://oprofile.sourceforge.net/about/'></ulink>. | 
|  | For examples on how to setup and use this tool, see the | 
|  | "<ulink url='&YOCTO_DOCS_PROF_URL;#profile-manual-oprofile'>OProfile</ulink>" | 
|  | section in the Yocto Project Profiling and Tracing Manual. | 
|  | </para></listitem> | 
|  | <listitem><para><emphasis>Perf:</emphasis> Performance counters for Linux used | 
|  | to keep track of certain types of hardware and software events. | 
|  | For more information on these types of counters see | 
|  | <ulink url='https://perf.wiki.kernel.org/'></ulink>. | 
|  | For examples on how to setup and use this tool, see the | 
|  | "<ulink url='&YOCTO_DOCS_PROF_URL;#profile-manual-perf'>perf</ulink>" | 
|  | section in the Yocto Project Profiling and Tracing Manual. | 
|  | </para></listitem> | 
|  | <listitem><para><emphasis>SystemTap:</emphasis> A free software infrastructure | 
|  | that simplifies information gathering about a running Linux system. | 
|  | This information helps you diagnose performance or functional problems. | 
|  | SystemTap is not available as a user-space tool through the Eclipse IDE Yocto Plug-in. | 
|  | See <ulink url='http://sourceware.org/systemtap'></ulink> for more information | 
|  | on SystemTap. | 
|  | For examples on how to setup and use this tool, see the | 
|  | "<ulink url='&YOCTO_DOCS_PROF_URL;#profile-manual-systemtap'>SystemTap</ulink>" | 
|  | section in the Yocto Project Profiling and Tracing Manual.</para></listitem> | 
|  | <listitem><para><emphasis>Lttng-ust:</emphasis> A User-space Tracer designed to | 
|  | provide detailed information on user-space activity. | 
|  | See <ulink url='http://lttng.org/ust'></ulink> for more information on Lttng-ust. | 
|  | </para></listitem> | 
|  | </itemizedlist> | 
|  | </para> | 
|  | </section> | 
|  |  | 
|  | </chapter> | 
|  | <!-- | 
|  | vim: expandtab tw=80 ts=4 | 
|  | --> |