poky/documentation/sdk-manual/sdk-appendix-mars.xml

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[<!ENTITY % poky SYSTEM "../poky.ent"> %poky; ] >

<appendix id='sdk-appendix-mars'>
    <title>Using Eclipse Mars</title>

    <para>
        This release of the Yocto Project supports both the Neon and Mars
        versions of the Eclipse IDE.
        This appendix presents information that describes how to obtain and
        configure the Mars version of Eclipse.
        It also provides a basic project example that you can work through
        from start to finish.
        For general information on using the Eclipse IDE and the Yocto
        Project Eclipse Plug-In, see the
        "<link linkend='sdk-developing-applications-using-eclipse'>Developing Applications Using <trademark class='trade'>Eclipse</trademark></link>"
        section.
    </para>

    <section id='mars-setting-up-the-eclipse-ide'>
        <title>Setting Up the Mars Version of the Eclipse IDE</title>

        <para>
            To develop within the Eclipse IDE, you need to do the following:
            <orderedlist>
                <listitem><para>Install the Mars version of the Eclipse
                    IDE.</para></listitem>
                <listitem><para>Configure the Eclipse IDE.
                    </para></listitem>
                <listitem><para>Install the Eclipse Yocto Plug-in.
                    </para></listitem>
                <listitem><para>Configure the Eclipse Yocto Plug-in.
                    </para></listitem>
            </orderedlist>
            <note>
                Do not install Eclipse from your distribution's package
                repository.
                Be sure to install Eclipse from the official Eclipse
                download site as directed in the next section.
            </note>
        </para>

        <section id='mars-installing-eclipse-ide'>
            <title>Installing the Mars Eclipse IDE</title>

            <para>
                Follow these steps to locate, install, and configure
                Mars Eclipse:
                <orderedlist>
                    <listitem><para><emphasis>Locate the Mars Download:</emphasis>
                        Open a browser and go to
                        <ulink url='http://www.eclipse.org/mars/'>http://www.eclipse.org/mars/</ulink>.
                        </para></listitem>
                    <listitem><para><emphasis>Download the Tarball:</emphasis>
                        Click the "Download" button and then use the "Linux
                        for Eclipse IDE for C++ Developers"
                        appropriate for your development system
                        (e.g.
                        <ulink url='http://www.eclipse.org/downloads/download.php?file=/technology/epp/downloads/release/mars/2/eclipse-cpp-mars-2-linux-gtk-x86_64.tar.gz'>64-bit under Linux for Eclipse IDE for C++ Developers</ulink>
                        if your development system is a Linux 64-bit machine.
                        </para></listitem>
                    <listitem><para><emphasis>Unpack the Tarball:</emphasis>
                        Move to a clean directory and unpack the tarball.
                        Here is an example:
                        <literallayout class='monospaced'>
     $ cd ~
     $ tar -xzvf ~/Downloads/eclipse-cpp-mars-2-linux-gtk-x86_64.tar.gz
                        </literallayout>
                        Everything unpacks into a folder named "Eclipse".
                        </para></listitem>
                    <listitem><para><emphasis>Launch Eclipse:</emphasis>
                        Double click the "Eclipse" file in the folder to
                        launch Eclipse.
                        <note>
                            If you experience a NullPointer Exception after
                            launch Eclipse or the debugger from within Eclipse,
                            try adding the following
                            to your <filename>eclipse.ini</filename> file,
                            which is located in the directory in which you
                            unpacked the Eclipse tar file:
                            <literallayout class='monospaced'>
     --launcher.GTK_version
     2
                            </literallayout>
                            Alternatively, you can export the
                            <filename>SWT_GTK</filename> variable in your
                            shell as follows:
                            <literallayout class='monospaced'>
     $ export SWT_GTK3=0
                            </literallayout>
                            </note>
                        </para></listitem>
                </orderedlist>
            </para>
        </section>

        <section id='mars-configuring-the-mars-eclipse-ide'>
            <title>Configuring the Mars Eclipse IDE</title>

            <para>
                Follow these steps to configure the Mars Eclipse IDE.
                <note>
                    Depending on how you installed Eclipse and what you have
                    already done, some of the options will not appear.
                    If you cannot find an option as directed by the manual,
                    it has already been installed.
                </note>
                <orderedlist>
                    <listitem><para>Be sure Eclipse is running and
                        you are in your workbench.
                        </para></listitem>
                    <listitem><para>Select "Install New Software" from
                        the "Help" pull-down menu.
                        </para></listitem>
                    <listitem><para>Select
                        "Mars - http://download.eclipse.org/releases/mars"
                        from the "Work with:" pull-down menu.
                        </para></listitem>
                    <listitem><para>Expand the box next to
                        "Linux Tools" and select "C/C++ Remote
                        (Over TCF/TE) Run/Debug Launcher" and
                        "TM Terminal".
                        </para></listitem>
                    <listitem><para>Expand the box next to "Mobile and
                        Device Development" and select the following
                        boxes:
                        <literallayout class='monospaced'>
     C/C++ Remote (Over TCF/TE) Run/Debug Launcher
     Remote System Explorer User Actions
     TM Terminal
     TCF Remote System Explorer add-in
     TCF Target Explorer
                        </literallayout>
                        </para></listitem>
                    <listitem><para>Expand the box next to
                        "Programming Languages" and select the
                        following boxes:
                        <literallayout class='monospaced'>
     C/C++ Autotools Support
     C/C++ Development Tools SDK
                        </literallayout>
                        </para></listitem>
                    <listitem><para>
                        Complete the installation by clicking through
                        appropriate "Next" and "Finish" buttons.
                        </para></listitem>
                </orderedlist>
            </para>
        </section>

        <section id='mars-installing-the-eclipse-yocto-plug-in'>
            <title>Installing or Accessing the Mars Eclipse Yocto Plug-in</title>

            <para>
                You can install the Eclipse Yocto Plug-in into the Eclipse
                IDE one of two ways:  use the Yocto Project's Eclipse
                Update site to install the pre-built plug-in or build and
                install the plug-in from the latest source code.
            </para>

            <section id='mars-new-software'>
                <title>Installing the Pre-built Plug-in from the Yocto Project Eclipse Update Site</title>

                <para>
                    To install the Mars Eclipse Yocto Plug-in from the update
                    site, follow these steps:
                    <orderedlist>
                        <listitem><para>Start up the Eclipse IDE.
                            </para></listitem>
                        <listitem><para>In Eclipse, select "Install New
                            Software" from the "Help" menu.
                            </para></listitem>
                        <listitem><para>Click "Add..." in the "Work with:"
                            area.
                            </para></listitem>
                       <listitem><para>Enter
                            <filename>&ECLIPSE_DL_PLUGIN_URL;/mars</filename>
                            in the URL field and provide a meaningful name
                            in the "Name" field.
                            </para></listitem>
                        <listitem><para>Click "OK" to have the entry added
                            to the "Work with:" drop-down list.
                            </para></listitem>
                        <listitem><para>Select the entry for the plug-in
                            from the "Work with:" drop-down list.
                            </para></listitem>
                        <listitem><para>Check the boxes next to the following:
                            <literallayout class='monospaced'>
     Yocto Project SDK Plug-in
     Yocto Project Documentation plug-in
                            </literallayout>
                            </para></listitem>
                        <listitem><para>Complete the remaining software
                            installation steps and then restart the Eclipse
                            IDE to finish the installation of the plug-in.
                            <note>
                                You can click "OK" when prompted about
                                installing software that contains unsigned
                                content.
                            </note>
                            </para></listitem>
                    </orderedlist>
                </para>
            </section>

            <section id='mars-zip-file-method'>
                <title>Installing the Plug-in Using the Latest Source Code</title>

                <para>
                    To install the Mars Eclipse Yocto Plug-in from the latest
                    source code, follow these steps:
                    <orderedlist>
                        <listitem><para>Be sure your development system
                            has JDK 1.7+
                            </para></listitem>
                        <listitem><para>install X11-related packages:
                            <literallayout class='monospaced'>
     $ sudo apt-get install xauth
                            </literallayout>
                            </para></listitem>
                        <listitem><para>In a new terminal shell, create a Git
                            repository with:
                            <literallayout class='monospaced'>
     $ cd ~
     $ git clone git://git.yoctoproject.org/eclipse-poky
                            </literallayout>
                            </para></listitem>
                        <listitem><para>Use Git to checkout the correct
                            tag:
                            <literallayout class='monospaced'>
     $ cd ~/eclipse-poky
     $ git checkout mars/yocto-&DISTRO;
                            </literallayout>
                            This puts you in a detached HEAD state, which
                            is fine since you are only going to be building
                            and not developing.
                            </para></listitem>
                        <listitem><para>Change to the
                            <filename>scripts</filename>
                            directory within the Git repository:
                            <literallayout class='monospaced'>
     $ cd scripts
                            </literallayout>
                            </para></listitem>
                        <listitem><para>Set up the local build environment
                            by running the setup script:
                            <literallayout class='monospaced'>
     $ ./setup.sh
                            </literallayout>
                            When the script finishes execution,
                            it prompts you with instructions on how to run
                            the <filename>build.sh</filename> script, which
                            is also in the <filename>scripts</filename>
                            directory of the Git repository created
                            earlier.
                            </para></listitem>
                        <listitem><para>Run the <filename>build.sh</filename>
                            script as directed.
                            Be sure to provide the tag name, documentation
                            branch, and a release name.</para>
                            <para>
                            Following is an example:
                            <literallayout class='monospaced'>
     $ ECLIPSE_HOME=/home/scottrif/eclipse-poky/scripts/eclipse ./build.sh -l mars/yocto-&DISTRO; master yocto-&DISTRO; 2>&amp;1 | tee build.log
                            </literallayout>
                            The previous example command adds the tag you
                            need for <filename>mars/yocto-&DISTRO;</filename>
                            to <filename>HEAD</filename>, then tells the
                            build script to use the local (-l) Git checkout
                            for the build.
                            After running the script, the file
                            <filename>org.yocto.sdk-</filename><replaceable>release</replaceable><filename>-</filename><replaceable>date</replaceable><filename>-archive.zip</filename>
                            is in the current directory.
                            </para></listitem>
                        <listitem><para>If necessary, start the Eclipse IDE
                            and be sure you are in the Workbench.
                            </para></listitem>
                        <listitem><para>Select "Install New Software" from
                            the "Help" pull-down menu.
                            </para></listitem>
                        <listitem><para>Click "Add".
                            </para></listitem>
                        <listitem><para>Provide anything you want in the
                            "Name" field.
                            </para></listitem>
                        <listitem><para>Click "Archive" and browse to the
                            ZIP file you built earlier.
                            This ZIP file should not be "unzipped", and must
                            be the <filename>*archive.zip</filename> file
                            created by running the
                            <filename>build.sh</filename> script.
                            </para></listitem>
                        <listitem><para>Click the "OK" button.
                            </para></listitem>
                        <listitem><para>Check the boxes that appear in
                            the installation window to install the
                            following:
                            <literallayout class='monospaced'>
     Yocto Project SDK Plug-in
     Yocto Project Documentation plug-in
                            </literallayout>
                            </para></listitem>
                        <listitem><para>Finish the installation by clicking
                            through the appropriate buttons.
                            You can click "OK" when prompted about
                            installing software that contains unsigned
                            content.
                            </para></listitem>
                        <listitem><para>Restart the Eclipse IDE if
                            necessary.
                            </para></listitem>
                    </orderedlist>
                </para>

                <para>
                    At this point you should be able to configure the
                    Eclipse Yocto Plug-in as described in the
                    "<link linkend='mars-configuring-the-eclipse-yocto-plug-in'>Configuring the Mars Eclipse Yocto Plug-in</link>"
                    section.</para>
            </section>
        </section>

        <section id='mars-configuring-the-eclipse-yocto-plug-in'>
            <title>Configuring the Mars Eclipse Yocto Plug-in</title>

            <para>
                Configuring the Mars Eclipse Yocto Plug-in involves setting the
                Cross Compiler options and the Target options.
                The configurations you choose become the default settings
                for all projects.
                You do have opportunities to change them later when
                you configure the project (see the following section).
            </para>

            <para>
                To start, you need to do the following from within the
                Eclipse IDE:
                <itemizedlist>
                    <listitem><para>Choose "Preferences" from the
                        "Window" menu to display the Preferences Dialog.
                        </para></listitem>
                    <listitem><para>Click "Yocto Project SDK" to display
                        the configuration screen.
                        </para></listitem>
                </itemizedlist>
                The following sub-sections describe how to configure the
                the plug-in.
                <note>
                    Throughout the descriptions, a start-to-finish example for
                    preparing a QEMU image for use with Eclipse is referenced
                    as the "wiki" and is linked to the example on the
                    <ulink url='https://wiki.yoctoproject.org/wiki/TipsAndTricks/RunningEclipseAgainstBuiltImage'> Cookbook guide to Making an Eclipse Debug Capable Image</ulink>
                    wiki page.
                </note>
            </para>

            <section id='mars-configuring-the-cross-compiler-options'>
                <title>Configuring the Cross-Compiler Options</title>

                <para>
                    Cross Compiler options enable Eclipse to use your specific
                    cross compiler toolchain.
                    To configure these options, you must select
                    the type of toolchain, point to the toolchain, specify
                    the sysroot location, and select the target
                    architecture.
                    <itemizedlist>
                        <listitem><para><emphasis>Selecting the Toolchain Type:</emphasis>
                            Choose between
                            <filename>Standalone pre-built toolchain</filename>
                            and
                            <filename>Build system derived toolchain</filename>
                            for Cross Compiler Options.
                                <itemizedlist>
                                    <listitem><para><emphasis>
                                        <filename>Standalone Pre-built Toolchain:</filename></emphasis>
                                        Select this type when you are using
                                        a stand-alone cross-toolchain.
                                        For example, suppose you are an
                                        application developer and do not
                                        need to build a target image.
                                        Instead, you just want to use an
                                        architecture-specific toolchain on
                                        an existing kernel and target root
                                        filesystem.
                                        In other words, you have downloaded
                                        and installed a pre-built toolchain
                                        for an existing image.
                                        </para></listitem>
                                   <listitem><para><emphasis>
                                        <filename>Build System Derived Toolchain:</filename></emphasis>
                                        Select this type if you built the
                                        toolchain as part of the
                                        <ulink url='&YOCTO_DOCS_DEV_URL;#build-directory'>Build Directory</ulink>.
                                        When you select
                                        <filename>Build system derived toolchain</filename>,
                                        you are using the toolchain built and
                                        bundled inside the Build Directory.
                                        For example, suppose you created a
                                        suitable image using the steps in the
                                        <ulink url='https://wiki.yoctoproject.org/wiki/TipsAndTricks/RunningEclipseAgainstBuiltImage'>wiki</ulink>.
                                        In this situation, you would select the
                                        <filename>Build system derived toolchain</filename>.
                                        </para></listitem>
                                </itemizedlist>
                            </para></listitem>
                        <listitem><para><emphasis>Specify the Toolchain Root Location:</emphasis>
                            If you are using a stand-alone pre-built
                            toolchain, you should be pointing to where it is
                            installed (e.g.
                            <filename>/opt/poky/&DISTRO;</filename>).
                            See the
                            "<link linkend='sdk-installing-the-sdk'>Installing the SDK</link>"
                            section for information about how the SDK is
                            installed.</para>
                            <para>If you are using a build system derived
                            toolchain, the path you provide for the
                            <filename>Toolchain Root Location</filename>
                            field is the
                            <ulink url='&YOCTO_DOCS_DEV_URL;#build-directory'>Build Directory</ulink>
                            from which you run the
                            <filename>bitbake</filename> command (e.g
                            <filename>/home/scottrif/poky/build</filename>).</para>
                            <para>For more information, see the
                            "<link linkend='sdk-building-an-sdk-installer'>Building an SDK Installer</link>"
                            section.
                            </para></listitem>
                        <listitem><para><emphasis>Specify Sysroot Location:</emphasis>
                            This location is where the root filesystem for
                            the target hardware resides.
                            </para>
                            <para>This location depends on where you
                            separately extracted and installed the target
                            filesystem.
                            As an example, suppose you prepared an image
                            using the steps in the
                            <ulink url='https://wiki.yoctoproject.org/wiki/TipsAndTricks/RunningEclipseAgainstBuiltImage'>wiki</ulink>.
                            If so, the <filename>MY_QEMU_ROOTFS</filename>
                            directory is found in the
                            <ulink url='&YOCTO_DOCS_DEV_URL;#build-directory'>Build Directory</ulink>
                            and you would browse to and select that directory
                            (e.g. <filename>/home/scottrif/build/MY_QEMU_ROOTFS</filename>).
                            </para>
                            <para>For more information on how to install the
                            toolchain and on how to extract and install the
                            sysroot filesystem, see the
                            "<link linkend='sdk-building-an-sdk-installer'>Building an SDK Installer</link>"
                            section.
                            </para></listitem>
                        <listitem><para><emphasis>Select the Target Architecture:</emphasis>
                            The target architecture is the type of hardware
                            you are going to use or emulate.
                            Use the pull-down
                            <filename>Target Architecture</filename> menu
                            to make your selection.
                            The pull-down menu should have the supported
                            architectures.
                            If the architecture you need is not listed in
                            the menu, you will need to build the image.
                            See the
                            "<ulink url='&YOCTO_DOCS_QS_URL;#qs-building-images'>Building Images</ulink>"
                            section of the Yocto Project Quick Start for
                            more information.
                            You can also see the
                            <ulink url='https://wiki.yoctoproject.org/wiki/TipsAndTricks/RunningEclipseAgainstBuiltImage'>wiki</ulink>.
                            </para></listitem>
                    </itemizedlist>
                </para>
            </section>

            <section id='mars-configuring-the-target-options'>
                <title>Configuring the Target Options</title>

                <para>
                    You can choose to emulate hardware using the QEMU
                    emulator, or you can choose to run your image on actual
                    hardware.
                    <itemizedlist>
                        <listitem><para><emphasis>QEMU:</emphasis>
                            Select this option if you will be using the
                            QEMU emulator.
                            If you are using the emulator, you also need to
                            locate the kernel and specify any custom
                            options.</para>
                            <para>If you selected the
                            <filename>Build system derived toolchain</filename>,
                            the target kernel you built will be located in
                            the
                            <ulink url='&YOCTO_DOCS_DEV_URL;#build-directory'>Build Directory</ulink>
                            in
                            <filename>tmp/deploy/images/<replaceable>machine</replaceable></filename>
                            directory.
                            As an example, suppose you performed the steps in
                            the
                            <ulink url='https://wiki.yoctoproject.org/wiki/TipsAndTricks/RunningEclipseAgainstBuiltImage'>wiki</ulink>.
                            In this case, you specify your Build Directory path
                            followed by the image (e.g.
                            <filename>/home/scottrif/poky/build/tmp/deploy/images/qemux86/bzImage-qemux86.bin</filename>).
                            </para>
                            <para>If you selected the standalone pre-built
                            toolchain, the pre-built image you downloaded is
                            located in the directory you specified when you
                            downloaded the image.</para>
                            <para>Most custom options are for advanced QEMU
                            users to further customize their QEMU instance.
                            These options are specified between paired
                            angled brackets.
                            Some options must be specified outside the
                            brackets.
                            In particular, the options
                            <filename>serial</filename>,
                            <filename>nographic</filename>, and
                            <filename>kvm</filename> must all be outside the
                            brackets.
                            Use the <filename>man qemu</filename> command
                            to get help on all the options and their use.
                            The following is an example:
                           <literallayout class='monospaced'>
    serial ‘&lt;-m 256 -full-screen&gt;’
                            </literallayout></para>
                            <para>
                            Regardless of the mode, Sysroot is already
                            defined as part of the Cross-Compiler Options
                            configuration in the
                            <filename>Sysroot Location:</filename> field.
                            </para></listitem>
                        <listitem><para><emphasis>External HW:</emphasis>
                            Select this option if you will be using actual
                            hardware.</para></listitem>
                    </itemizedlist>
                </para>

                <para>
                    Click the "Apply" and "OK" to save your plug-in
                    configurations.
                </para>
            </section>
        </section>
    </section>

    <section id='mars-creating-the-project'>
        <title>Creating the Project</title>

        <para>
            You can create two types of projects:  Autotools-based, or
            Makefile-based.
            This section describes how to create Autotools-based projects
            from within the Eclipse IDE.
            For information on creating Makefile-based projects in a
            terminal window, see the
            "<link linkend='makefile-based-projects'>Makefile-Based Projects</link>"
            section.
            <note>
                Do not use special characters in project names
                (e.g. spaces, underscores, etc.).  Doing so can
                cause configuration to fail.
            </note>
        </para>

        <para>
            To create a project based on a Yocto template and then display
            the source code, follow these steps:
            <orderedlist>
                <listitem><para>Select "C Project" from the "File -> New" menu.
                    </para></listitem>
                <listitem><para>Expand <filename>Yocto Project SDK Autotools Project</filename>.
                    </para></listitem>
                <listitem><para>Select <filename>Hello World ANSI C Autotools Projects</filename>.
                    This is an Autotools-based project based on a Yocto
                    template.
                    </para></listitem>
                <listitem><para>Put a name in the <filename>Project name:</filename>
                    field.
                    Do not use hyphens as part of the name
                    (e.g. <filename>hello</filename>).
                    </para></listitem>
                <listitem><para>Click "Next".
                    </para></listitem>
                <listitem><para>Add appropriate information in the various
                    fields.
                    </para></listitem>
                <listitem><para>Click "Finish".
                    </para></listitem>
                <listitem><para>If the "open perspective" prompt appears,
                    click "Yes" so that you in the C/C++ perspective.
                    </para></listitem>
                <listitem><para>The left-hand navigation pane shows your
                    project.
                    You can display your source by double clicking the
                    project's source file.
                    </para></listitem>
            </orderedlist>
        </para>
    </section>

    <section id='mars-configuring-the-cross-toolchains'>
        <title>Configuring the Cross-Toolchains</title>

        <para>
            The earlier section,
            "<link linkend='mars-configuring-the-eclipse-yocto-plug-in'>Configuring the Mars Eclipse Yocto Plug-in</link>",
            sets up the default project configurations.
            You can override these settings for a given project by following
            these steps:
            <orderedlist>
                <listitem><para>Select "Yocto Project Settings" from
                    the "Project -> Properties" menu.
                    This selection brings up the Yocto Project Settings
                    Dialog and allows you to make changes specific to an
                    individual project.</para>
                    <para>By default, the Cross Compiler Options and Target
                    Options for a project are inherited from settings you
                    provided using the Preferences Dialog as described
                    earlier in the
                    "<link linkend='mars-configuring-the-eclipse-yocto-plug-in'>Configuring the Mars Eclipse Yocto Plug-in</link>" section.
                    The Yocto Project Settings Dialog allows you to override
                    those default settings for a given project.
                    </para></listitem>
                <listitem><para>Make or verify your configurations for the
                    project and click "OK".
                    </para></listitem>
                <listitem><para>Right-click in the navigation pane and
                    select "Reconfigure Project" from the pop-up menu.
                    This selection reconfigures the project by running
                    <filename>autogen.sh</filename> in the workspace for
                    your project.
                    The script also runs <filename>libtoolize</filename>,
                    <filename>aclocal</filename>,
                    <filename>autoconf</filename>,
                    <filename>autoheader</filename>,
                    <filename>automake --a</filename>, and
                    <filename>./configure</filename>.
                    Click on the "Console" tab beneath your source code to
                    see the results of reconfiguring your project.
                    </para></listitem>
            </orderedlist>
        </para>
    </section>

    <section id='mars-building-the-project'>
        <title>Building the Project</title>

        <para>
            To build the project select "Build All" from the
            "Project" menu.
            The console should update and you can note the cross-compiler
            you are using.
            <note>
                When building "Yocto Project SDK Autotools" projects, the
                Eclipse IDE might display error messages for
                Functions/Symbols/Types that cannot be "resolved", even when
                the related include file is listed at the project navigator and
                when the project is able to build.
                For these cases only, it is recommended to add a new linked
                folder to the appropriate sysroot.
                Use these steps to add the linked folder:
                <orderedlist>
                    <listitem><para>
                        Select the project.
                        </para></listitem>
                    <listitem><para>
                        Select "Folder" from the
                        <filename>File > New</filename> menu.
                        </para></listitem>
                    <listitem><para>
                        In the "New Folder" Dialog, select "Link to alternate
                        location (linked folder)".
                        </para></listitem>
                    <listitem><para>
                        Click "Browse" to navigate to the include folder inside
                        the same sysroot location selected in the Yocto Project
                        configuration preferences.
                        </para></listitem>
                    <listitem><para>
                        Click "OK".
                        </para></listitem>
                    <listitem><para>
                        Click "Finish" to save the linked folder.
                        </para></listitem>
                </orderedlist>
            </note>
        </para>
    </section>

    <section id='mars-starting-qemu-in-user-space-nfs-mode'>
        <title>Starting QEMU in User-Space NFS Mode</title>

        <para>
            To start the QEMU emulator from within Eclipse, follow these
            steps:
            <note>
                See the
                "<ulink url='&YOCTO_DOCS_DEV_URL;#dev-manual-qemu'>Using the Quick EMUlator (QEMU)</ulink>"
                chapter in the Yocto Project Development Manual
                for more information on using QEMU.
            </note>
            <orderedlist>
                <listitem><para>Expose and select "External Tools
                    Configurations ..." from the "Run -> External Tools" menu.
                    </para></listitem>
                <listitem><para>
                    Locate and select your image in the navigation panel to
                    the left (e.g. <filename>qemu_i586-poky-linux</filename>).
                    </para></listitem>
                <listitem><para>
                    Click "Run" to launch QEMU.
                    <note>
                        The host on which you are running QEMU must have
                        the <filename>rpcbind</filename> utility running to be
                        able to make RPC calls on a server on that machine.
                        If QEMU does not invoke and you receive error messages
                        involving <filename>rpcbind</filename>, follow the
                        suggestions to get the service running.
                        As an example, on a new Ubuntu 16.04 LTS installation,
                        you must do the following in order to get QEMU to
                        launch:
                        <literallayout class='monospaced'>
     $ sudo apt-get install rpcbind
                        </literallayout>
                        After installing <filename>rpcbind</filename>, you
                        need to edit the
                        <filename>/etc/init.d/rpcbind</filename> file to
                        include the following line:
                        <literallayout class='monospaced'>
     OPTIONS="-i -w"
                        </literallayout>
                        After modifying the file, you need to start the
                        service:
                        <literallayout class='monospaced'>
     $ sudo service portmap restart
                        </literallayout>
                    </note>
                    </para></listitem>
                <listitem><para>If needed, enter your host root password in
                    the shell window at the prompt.
                    This sets up a <filename>Tap 0</filename> connection
                    needed for running in user-space NFS mode.
                    </para></listitem>
                <listitem><para>Wait for QEMU to launch.
                    </para></listitem>
                <listitem><para>Once QEMU launches, you can begin operating
                    within that environment.
                    One useful task at this point would be to determine the
                    IP Address for the user-space NFS by using the
                    <filename>ifconfig</filename> command.
                    The IP address of the QEMU machine appears in the
                    xterm window.
                    You can use this address to help you see which particular
                    IP address the instance of QEMU is using.
                    </para></listitem>
            </orderedlist>
        </para>
    </section>

    <section id='mars-deploying-and-debugging-the-application'>
        <title>Deploying and Debugging the Application</title>

        <para>
            Once the QEMU emulator is running the image, you can deploy
            your application using the Eclipse IDE and then use
            the emulator to perform debugging.
            Follow these steps to deploy the application.
            <note>
                Currently, Eclipse does not support SSH port forwarding.
                Consequently, if you need to run or debug a remote
                application using the host display, you must create a
                tunneling connection from outside Eclipse and keep
                that connection alive during your work.
                For example, in a new terminal, run the following:
                <literallayout class='monospaced'>
     $ ssh -XY <replaceable>user_name</replaceable>@<replaceable>remote_host_ip</replaceable>
                </literallayout>
                Using the above form, here is an example:
                <literallayout class='monospaced'>
     $ ssh -XY root@192.168.7.2
                </literallayout>
                After running the command, add the command to be executed
                in Eclipse's run configuration before the application
                as follows:
                <literallayout class='monospaced'>
     export DISPLAY=:10.0
                </literallayout>
                Be sure to not destroy the connection during your QEMU
                session (i.e. do not
                exit out of or close that shell).
            </note>
            <orderedlist>
                <listitem><para>Select "Debug Configurations..." from the
                    "Run" menu.</para></listitem>
                <listitem><para>In the left area, expand
                    <filename>C/C++Remote Application</filename>.
                    </para></listitem>
                <listitem><para>Locate your project and select it to bring
                    up a new tabbed view in the Debug Configurations Dialog.
                    </para></listitem>
                <listitem><para>Click on the "Debugger" tab to see the
                    cross-tool debugger you are using.
                    Be sure to change to the debugger perspective in Eclipse.
                    </para></listitem>
                <listitem><para>Click on the "Main" tab.
                    </para></listitem>
                <listitem><para>Create a new connection to the QEMU instance
                    by clicking on "new".</para></listitem>
                <listitem><para>Select <filename>SSH</filename>, which means
                    Secure Socket Shell.
                    Optionally, you can select an TCF connection instead.
                    </para></listitem>
                <listitem><para>Click "Next".
                    </para></listitem>
                <listitem><para>Clear out the "Connection name" field and
                    enter any name you want for the connection.
                    </para></listitem>
                <listitem><para>Put the IP address for the connection in
                    the "Host" field.
                    For QEMU, the default is <filename>192.168.7.2</filename>.
                    However, if a previous QEMU session did not exit
                    cleanly, the IP address increments (e.g.
                    <filename>192.168.7.3</filename>).
                    <note>
                        You can find the IP address for the current QEMU
                        session by looking in the xterm that opens when
                        you launch QEMU.
                    </note>
                    </para></listitem>
                <listitem><para>Enter <filename>root</filename>, which
                    is the default for QEMU, for the "User" field.
                    Be sure to leave the password field empty.
                    </para></listitem>
                <listitem><para>Click "Finish" to close the
                    New Connections Dialog.
                    </para></listitem>
                <listitem><para>If necessary, use the drop-down menu now in the
                    "Connection" field and pick the IP Address you entered.
                     </para></listitem>
                <listitem><para>Assuming you are connecting as the root user,
                    which is the default for QEMU x86-64 SDK images provided by
                    the Yocto Project, in the "Remote Absolute File Path for
                    C/C++ Application" field, browse to
                    <filename>/home/root</filename>.
                    You could also browse to any other path you have write
                    access to on the target such as
                    <filename>/usr/bin</filename>.
                    This location is where your application will be located on
                    the QEMU system.
                    If you fail to browse to and specify an appropriate
                    location, QEMU will not understand what to remotely
                    launch.
                    Eclipse is helpful in that it auto fills your application
                    name for you assuming you browsed to a directory.
                    <note>
                        If you are prompted to provide a username and to
                        optionally set a password, be sure you provide
                        "root" as the username and you leave the password
                        field blank.
                    </note>
                    </para></listitem>
                <listitem><para>
                    Be sure you change to the "Debug" perspective in Eclipse.
                    </para></listitem>
                <listitem><para>Click "Debug"
                    </para></listitem>
                <listitem><para>Accept the debug perspective.
                    </para></listitem>
            </orderedlist>
        </para>
    </section>

    <section id='mars-using-Linuxtools'>
        <title>Using Linuxtools</title>

        <para>
            As mentioned earlier in the manual, performance tools exist
            (Linuxtools) that enhance your development experience.
            These tools are aids in developing and debugging applications and
            images.
            You can run these tools from within the Eclipse IDE through the
            "Linuxtools" menu.
        </para>

        <para>
            For information on how to configure and use these tools, see
            <ulink url='http://www.eclipse.org/linuxtools/'>http://www.eclipse.org/linuxtools/</ulink>.
        </para>
    </section>
</appendix>
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