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