summaryrefslogtreecommitdiffstats
path: root/documentation/adt-manual/adt-intro.xml
blob: b8c9f7979ef94ec6469965cffff0ce1528db4030 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
<!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>Introduction</title>

<para>
    Welcome to the Yocto Project Application Developer's Guide.
    This manual provides information that lets you begin developing applications
    using the Yocto Project.
</para>

<para>
    The Yocto Project provides an application development environment based on
    an Application Development Toolkit (ADT) and the availability of stand-alone
    cross-development toolchains and other tools.
    This manual describes the ADT and how you can configure and install it,
    how to access and use the cross-development toolchains, how to
    customize the development packages installation,
    how to use command line development for both Autotools-based and Makefile-based projects,
    and an introduction to the Eclipse Yocto Plug-in.
</para>

<section id='adt-intro-section'>
    <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 OpenEmbedded build system, which uses Poky.
                The toolchain and sysroot are based on a metadata 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-toolchain'>
        <title>The Cross-Toolchain</title>

        <para>
            The cross-toolchain 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 Poky 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 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 sourcing 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 distribution.
            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.
                    You can find out more about LatencyTOP at
                    <ulink url='http://www.latencytop.org/'></ulink>.</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> and click
<!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>Introduction</title>

<para>
    Welcome to the Yocto Project Application Developer's Guide.
    This manual provides information that lets you begin developing applications
    using the Yocto Project.
</para>

<para>
    The Yocto Project provides an application development environment based on
    an Application Development Toolkit (ADT) and the availability of stand-alone
    cross-development toolchains and other tools.
    This manual describes the ADT and how you can configure and install it,
    how to access and use the cross-development toolchains, how to
    customize the development packages installation,
    how to use command line development for both Autotools-based and Makefile-based projects,
    and an introduction to the Eclipse Yocto Plug-in.
</para>

<section id='adt-intro-section'>
    <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 OpenEmbedded build system, which uses Poky.
                The toolchain and sysroot are based on a metadata 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-toolchain'>
        <title>The Cross-Toolchain</title>

        <para>
            The cross-toolchain 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 Poky 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 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 sourcing 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 distribution.
            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.
                    You can find out more about LatencyTOP at
                    <ulink url='http://www.latencytop.org/'></ulink>.</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> and click
                    on “Perf tools.”
                    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>
</section>

</chapter>
<!--
vim: expandtab tw=80 ts=4
-->