138 lines
6.6 KiB
XML
138 lines
6.6 KiB
XML
<!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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<chapter id='adt-intro'>
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<title>Application Development Toolkit (ADT) User's Guide</title>
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<para>
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Welcome to the Application Development Toolkit User’s Guide. This manual provides
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information that lets you get going with the ADT to develop projects using the Yocto
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Project.
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</para>
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<section id='book-intro'>
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<title>Introducing the Application Development Toolkit (ADT)</title>
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<para>
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Fundamentally, the ADT consists of an architecture-specific cross-toolchain and
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a matching sysroot that are both built by the Yocto Project build system Poky.
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The toolchain and sysroot are based on a metadata configuration and extensions,
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which allows you to cross-develop on the host machine for the target.
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</para>
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<para>
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Additionally, to provide an effective development platform, the Yocto Project
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makes available and suggests other tools you can use with the ADT.
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These other tools include the Eclipse IDE Yocto Plug-in, an emulator (QEMU),
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and various user-space tools that greatly enhance your development experience.
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</para>
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<para>
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The resulting combination of the architecture-specific cross-toolchain and sysroot
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along with these additional tools yields a custom-built, cross-development platform
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for a user-targeted product.
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</para>
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</section>
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<section id='adt-components'>
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<title>ADT Components</title>
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<para>
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This section provides a brief description of what comprises the ADT.
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</para>
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<section id='the-cross-toolchain'>
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<title>The Cross-Toolchain</title>
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<para>
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The cross-toolchain consists of a cross-compiler, cross-linker, and cross-debugger
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that are used to develop user-space applications for targeted hardware.
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This toolchain is created either by running the ADT Installer script or
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through a Yocto Project build tree that is based on your metadata
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configuration or extension for 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 Yocto Project's build system Poky 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='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>If you use the ADT Installer script to install ADT, you can
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specify whether or not to install QEMU.</para></listitem>
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<listitem><para>If you have downloaded a Yocto Project release and unpacked
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it to create a Yocto Project file structure and you have sourced
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the Yocto Project environment setup script, QEMU is installed and automatically
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available.</para></listitem>
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<listitem><para>If you have installed the cross-toolchain
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tarball and you have sourcing the toolchain's setup environment script, QEMU
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is also installed and automatically available.</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 distribution.
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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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You can find out more about LatencyTOP at
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<ulink url='http://www.latencytop.org/'></ulink>.</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='http://www.linuxpowertop.org/'></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>.</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> and click
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on “Perf tools.”</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 Yocto Eclipse IDE Plug-in.
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See <ulink url='http://sourceware.org/systemtap'></ulink> for more information
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on SystemTap.</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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</section>
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</chapter>
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