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| |
| <chapter id='sdk-eclipse-project'> |
| |
| <title>Developing Applications Using <trademark class='trade'>Eclipse</trademark></title> |
| |
| <para> |
| If you are familiar with the popular Eclipse IDE, you can use an |
| Eclipse Yocto Plug-in to allow you to develop, deploy, and test your |
| application all from within Eclipse. |
| This chapter describes general workflow using the SDK and Eclipse |
| and how to configure and set up Eclipse. |
| <note><title>Notes</title> |
| <itemizedlist> |
| <listitem><para> |
| This chapter assumes development of applications on top of |
| an image prepared using the Yocto Project. |
| As such, inclusion of a pre-built image or the building of |
| an image is included in the workflow. |
| </para></listitem> |
| <listitem><para> |
| The chapter also assumes development on a build host that |
| is set up to use the Yocto Project. |
| Realize that you can easily use Eclipse and the Yocto |
| Project plug-in to develop an application for any number |
| of images developed and tested on different machines. |
| </para></listitem> |
| </itemizedlist> |
| </note> |
| </para> |
| |
| <section id='application-development-workflow-using-eclipse'> |
| <title>Application Development Workflow Using <trademark class='trade'>Eclipse</trademark></title> |
| |
| <para> |
| The following figure and supporting list summarize a |
| general workflow for application development that uses the |
| SDK within the Eclipse IDE. |
| The application developed runs on top of an image created using |
| the Yocto Project. |
| </para> |
| |
| <para> |
| <imagedata fileref="figures/sdk-eclipse-dev-flow.png" |
| width="7in" depth="7in" align="center" scale="100" /> |
| </para> |
| |
| <para> |
| <orderedlist> |
| <listitem><para> |
| <emphasis>Prepare the Host System for the Yocto Project</emphasis>: |
| Because this example workflow assumes development on a |
| system set up to use the Yocto Project, you need to be |
| sure your |
| <ulink url='&YOCTO_DOCS_REF_URL;#hardware-build-system-term'>build host</ulink> |
| can use the Yocto Project. |
| See the |
| "<ulink url='&YOCTO_DOCS_DEV_URL;#setting-up-the-development-host-to-use-the-yocto-project'>Preparing a Build Host</ulink>" |
| section in the Yocto Project Development Tasks Manual for |
| information on how to set up your build host. |
| <note> |
| Be sure you install the "xterm" package, which is a |
| <ulink url='&YOCTO_DOCS_REF_URL;#required-packages-for-the-host-development-system'>graphical and Eclipse plug-in extra</ulink> |
| needed by Eclipse. |
| </note> |
| </para></listitem> |
| <listitem><para> |
| <emphasis>Secure the Yocto Project Kernel Target Image</emphasis>: |
| This example workflow assumes application development on |
| top of an image built using the Yocto Project. |
| Depending on whether you are using a pre-built image |
| that matches your target architecture or you are using an |
| image you build using the |
| <ulink url='&YOCTO_DOCS_REF_URL;#build-system-term'>OpenEmbedded Build System</ulink> |
| and where you are going to run the image while you |
| develop your application (QEMU or real hardware), the |
| area from which you get the image differs. |
| <itemizedlist> |
| <listitem><para> |
| Download the image from |
| <ulink url='&YOCTO_MACHINES_DL_URL;'><filename>machines</filename></ulink> |
| if your target architecture is supported and |
| you are going to develop and test your |
| application on actual hardware. |
| </para></listitem> |
| <listitem><para> |
| Download the image from |
| <ulink url='&YOCTO_QEMU_DL_URL;'> |
| <filename>machines/qemu</filename></ulink> if |
| your target architecture is supported and you |
| are going to develop and test your application |
| using the |
| <ulink url='&YOCTO_DOCS_DEV_URL;#dev-manual-qemu'>QEMU Emulator</ulink>. |
| </para></listitem> |
| <listitem><para> |
| Build your image if you cannot find a pre-built |
| image that matches your target architecture. |
| If your target architecture is similar to a |
| supported architecture, you can modify the |
| kernel image before you build it. |
| See the |
| "<ulink url='&YOCTO_DOCS_KERNEL_DEV_URL;#using-devtool-to-patch-the-kernel'>Using <filename>devtool</filename> to Patch the Kernel</ulink>" |
| section in the Yocto Project Linux Kernel |
| Development Manual for an example. |
| You can also see the |
| "<ulink url='https://wiki.yoctoproject.org/wiki/TipsAndTricks/RunningEclipseAgainstBuiltImage#Making_a_Suitable_Qemux86_Image'>Making a Suitable Qemux86 Image</ulink>" |
| wiki for steps needed to build an image suitable |
| for QEMU and for debugging within the Eclipse IDE. |
| </para></listitem> |
| </itemizedlist> |
| </para></listitem> |
| <listitem> |
| <para><emphasis>Install the SDK</emphasis>: |
| The SDK provides a target-specific cross-development |
| toolchain, the root filesystem, the QEMU emulator, and |
| other tools that can help you develop your application. |
| For information on how to install the SDK, see the |
| "<link linkend='sdk-installing-the-sdk'>Installing the SDK</link>" |
| section. |
| </para></listitem> |
| <listitem><para> |
| <emphasis>Secure the Target Root Filesystem and the Cross-Development Toolchain</emphasis>: |
| You need to find and download the appropriate root |
| filesystem and the cross-development toolchain.</para> |
| |
| <para>You can find the tarballs for the root filesystem |
| in the same area used for the kernel image. |
| Depending on the type of image you are running, the |
| root filesystem you need differs. |
| For example, if you are developing an application that |
| runs on an image that supports Sato, you need to get a |
| root filesystem that supports Sato.</para> |
| |
| <para>You can find the cross-development toolchains at |
| <ulink url='&YOCTO_TOOLCHAIN_DL_URL;'><filename>toolchains</filename></ulink>. |
| Be sure to get the correct toolchain for your |
| development host and your target architecture. |
| See the "<link linkend='sdk-locating-pre-built-sdk-installers'>Locating Pre-Built SDK Installers</link>" |
| section for information and the |
| "<link linkend='sdk-installing-the-sdk'>Installing the SDK</link>" |
| section for installation information. |
| <note> |
| As an alternative to downloading an SDK, you can |
| build the SDK installer. |
| For information on building the installer, see the |
| "<link linkend='sdk-building-an-sdk-installer'>Building an SDK Installer</link>" |
| section. |
| Another helpful resource for building an installer |
| is the |
| "<ulink url='https://wiki.yoctoproject.org/wiki/TipsAndTricks/RunningEclipseAgainstBuiltImage'>Cookbook guide to Making an Eclipse Debug Capable Image</ulink>" |
| wiki page. |
| </note> |
| </para></listitem> |
| <listitem><para> |
| <emphasis>Create and Build Your Application</emphasis>: |
| You need to have source files for your application. |
| Once you have the files, you can use the Eclipse IDE |
| to import them and build the project. |
| </para></listitem> |
| <listitem><para> |
| <emphasis>Deploy the Image With the Application</emphasis>: |
| Using the Eclipse IDE, you can deploy your image to the |
| hardware or to QEMU through the project's preferences. |
| You can also use Eclipse to load and test your image |
| under QEMU. |
| See the |
| "<ulink url='&YOCTO_DOCS_DEV_URL;#dev-manual-qemu'>Using the Quick EMUlator (QEMU)</ulink>" |
| chapter in the Yocto Project Development Tasks Manual |
| for information on using QEMU. |
| </para></listitem> |
| <listitem><para> |
| <emphasis>Test and Debug the Application</emphasis>: |
| Once your application is deployed, you need to test it. |
| Within the Eclipse IDE, you can use the debugging |
| environment along with supported performance enhancing |
| <ulink url='http://www.eclipse.org/linuxtools/'>Linux Tools</ulink>. |
| </para></listitem> |
| </orderedlist> |
| </para> |
| </section> |
| |
| <section id='adt-eclipse'> |
| <title>Working Within Eclipse</title> |
| |
| <para> |
| The Eclipse IDE is a popular development environment and it |
| fully supports development using the Yocto Project. |
| </para> |
| |
| <para> |
| 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 as well |
| as actual target hardware. |
| You can also perform cross-debugging and profiling. |
| The environment also supports performance enhancing |
| <ulink url='http://www.eclipse.org/linuxtools/'>tools</ulink> |
| that allow you to perform remote profiling, tracing, |
| collection of power data, collection of latency data, and |
| collection of performance data. |
| <note> |
| This release of the Yocto Project supports both the Oxygen |
| and Neon versions of the Eclipse IDE. |
| This section provides information on how to use the Oxygen |
| release with the Yocto Project. |
| For information on how to use the Neon version of Eclipse |
| with the Yocto Project, see |
| "<link linkend='sdk-appendix-neon-yp-eclipse-plug-in'>Appendix D</link>". |
| </note> |
| </para> |
| |
| <section id='oxygen-setting-up-the-eclipse-ide'> |
| <title>Setting Up the Oxygen Version of the Eclipse IDE</title> |
| |
| <para> |
| To develop within the Eclipse IDE, you need to do the |
| following: |
| <orderedlist> |
| <listitem><para> |
| Install the Oxygen 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='oxygen-installing-eclipse-ide'> |
| <title>Installing the Oxygen Eclipse IDE</title> |
| |
| <para> |
| Follow these steps to locate, install, and configure |
| Oxygen Eclipse: |
| <orderedlist> |
| <listitem><para> |
| <emphasis>Locate the Oxygen Download:</emphasis> |
| Open a browser and go to |
| <ulink url='http://www.eclipse.org/oxygen/'>http://www.eclipse.org/oxygen/</ulink>. |
| </para></listitem> |
| <listitem><para> |
| <emphasis>Download the Tarball:</emphasis> |
| Click through the "Download" buttons to |
| download the file. |
| </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-inst-linux64.tar.gz |
| </literallayout> |
| Everything unpacks into a folder named |
| "eclipse-installer". |
| </para></listitem> |
| <listitem><para> |
| <emphasis>Launch the Installer:</emphasis> |
| Use the following commands to launch the |
| installer: |
| <literallayout class='monospaced'> |
| $ cd ~/eclipse-installer |
| $ ./eclipse-inst |
| </literallayout> |
| </para></listitem> |
| <listitem><para> |
| <emphasis>Select Your IDE:</emphasis> |
| From the list, select the "Eclipse IDE for |
| C/C++ Developers". |
| </para></listitem> |
| <listitem><para> |
| <emphasis>Install the Software:</emphasis> |
| Click "Install" to begin the installation. |
| Accept all the certificates and any license |
| agreements. |
| Click "Install" again to finish the installation. |
| </para></listitem> |
| <listitem><para> |
| <emphasis>Launch Oxygen:</emphasis> |
| Accept the default "workspace" and click the |
| "Launch" button. |
| You should see the Eclipse welcome page from which |
| can click "workbench" to enter your workspace. |
| <note> |
| The executable for Eclipse is located in the |
| <filename>eclipse/cpp-oxygen/eclipse</filename> |
| folder. |
| To launch Eclipse outside of the installation |
| process, simply execute that binary. |
| Here is an example: |
| <literallayout class='monospaced'> |
| $ ~/eclipse/cpp-oxygen/eclipse/eclipse |
| </literallayout> |
| </note> |
| </para></listitem> |
| </orderedlist> |
| </para> |
| </section> |
| |
| <section id='oxygen-configuring-the-eclipse-ide'> |
| <title>Configuring the Oxygen Eclipse IDE</title> |
| |
| <para> |
| Follow these steps to configure the Oxygen Eclipse IDE. |
| <note><title>Notes</title> |
| <itemizedlist> |
| <listitem><para> |
| Depending on how you installed Eclipse and what |
| you have already done, some of the options do |
| not appear. |
| If you cannot find an option as directed by the |
| manual, it has already been installed. |
| </para></listitem> |
| <listitem><para> |
| If you want to see all options regardless of |
| whether they are installed or not, deselect the |
| "Hide items that are already installed" |
| check box. |
| </para></listitem> |
| </itemizedlist> |
| </note> |
| <orderedlist> |
| <listitem><para> |
| Be sure Eclipse is running and you are in your |
| workbench. |
| Just click "workbench" if you are not in your |
| default workspace. |
| </para></listitem> |
| <listitem><para> |
| Select "Install New Software" from the "Help" |
| pull-down menu. |
| </para></listitem> |
| <listitem><para> |
| Select |
| "Oxygen - http://download.eclipse.org/releases/oxygen" |
| from the "Work with:" pull-down menu. |
| </para></listitem> |
| <listitem><para> |
| Expand the box next to "Linux Tools" and select |
| the following: |
| <literallayout class='monospaced'> |
| C/C++ Remote (Over TCF/TE) Run/Debug Launcher |
| TM Terminal |
| </literallayout> |
| </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 box: |
| <literallayout class='monospaced'> |
| C/C++ Development Tools SDK |
| </literallayout> |
| </para></listitem> |
| <listitem><para> |
| Complete the installation by clicking through |
| appropriate "Next" and "Finish" buttons and then |
| restart the Eclipse IDE. |
| </para></listitem> |
| </orderedlist> |
| </para> |
| </section> |
| |
| <section id='oxygen-installing-the-eclipse-yocto-plug-in'> |
| <title>Installing or Accessing the Oxygen 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='oxygen-new-software'> |
| <title>Installing the Pre-built Plug-in from the Yocto Project Eclipse Update Site</title> |
| |
| <para> |
| To install the Oxygen 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;/oxygen</filename> |
| in the URL field and provide a meaningful |
| name in the "Name" field. |
| </para></listitem> |
| <listitem><para> |
| Click "OK" to have the entry automatically |
| populate the "Work with:" field and to have |
| the items for installation appear in the window |
| below. |
| </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='oxygen-zip-file-method'> |
| <title>Installing the Plug-in Using the Latest Source Code</title> |
| |
| <para> |
| To install the Oxygen Eclipse Yocto Plug-in from the |
| latest source code, follow these steps: |
| <orderedlist> |
| <listitem><para> |
| Be sure your build host has JDK version 1.8 |
| or greater. |
| On a Linux build host you can determine the |
| version using the following command: |
| <literallayout class='monospaced'> |
| $ java -version |
| </literallayout> |
| </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-yocto |
| </literallayout> |
| </para></listitem> |
| <listitem><para> |
| Use Git to create the correct tag: |
| <literallayout class='monospaced'> |
| $ cd ~/eclipse-yocto |
| $ git checkout -b oxygen/&DISTRO_NAME_NO_CAP; remotes/origin/oxygen/&DISTRO_NAME_NO_CAP; |
| </literallayout> |
| This creates a local tag named |
| <filename>oxygen/&DISTRO_NAME_NO_CAP;</filename> |
| based on the branch |
| <filename>origin/oxygen/&DISTRO_NAME_NO_CAP;</filename>. |
| You are put into 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-yocto/scripts/eclipse ./build.sh -l oxygen/&DISTRO_NAME_NO_CAP; master yocto-&DISTRO; 2>&1 | tee build.log |
| </literallayout> |
| The previous example command adds the tag |
| you need for |
| <filename>oxygen/&DISTRO_NAME_NO_CAP;</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='oxygen-configuring-the-eclipse-yocto-plug-in'>Configuring the Oxygen Eclipse Yocto Plug-in</link>" |
| section. |
| </para> |
| </section> |
| </section> |
| |
| <section id='oxygen-configuring-the-eclipse-yocto-plug-in'> |
| <title>Configuring the Oxygen Eclipse Yocto Plug-In</title> |
| |
| <para> |
| Configuring the Oxygen 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: |
| <orderedlist> |
| <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> |
| </orderedlist> |
| The following sub-sections describe how to configure |
| 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='oxygen-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 "Standalone pre-built toolchain" |
| and "Build system derived toolchain" for |
| Cross Compiler Options. |
| <itemizedlist> |
| <listitem><para> |
| <emphasis>Standalone Pre-built Toolchain:</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>Build System Derived Toolchain:</emphasis> |
| Select this type if you built the |
| toolchain as part of the |
| <ulink url='&YOCTO_DOCS_REF_URL;#build-directory'>Build Directory</ulink>. |
| When you select "Build system derived |
| toolchain", 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 |
| "Build system derived toolchain". |
| </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 "Toolchain Root Location" field is the |
| <ulink url='&YOCTO_DOCS_REF_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 when you either built |
| it or downloaded it. |
| <note> |
| If you downloaded the root filesystem |
| for the target hardware rather than |
| built it, you must download the |
| <filename>sato-sdk</filename> image |
| in order to build any c/c++ projects. |
| </note> |
| 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 Build Directory |
| and you would browse to and select that |
| directory (e.g. |
| <filename>/home/scottrif/poky/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 "Target Architecture" |
| 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_DEV_URL;#dev-building-a-simple-image'>Building a Simple Image</ulink>" |
| section of the Yocto Project Development Tasks |
| Manual 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='oxygen-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 Build system derived |
| toolchain, the target kernel you built will be |
| located in the |
| <ulink url='&YOCTO_DOCS_REF_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 ‘<-m 256 -full-screen>’ |
| </literallayout> |
| Regardless of the mode, Sysroot is already |
| defined as part of the Cross-Compiler |
| Options configuration in the "Sysroot |
| Location:" 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 "Apply and Close" to save your plug-in |
| configurations. |
| </para> |
| </section> |
| </section> |
| </section> |
| |
| <section id='oxygen-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/C++ Project" from the "File -> New" menu. |
| </para></listitem> |
| <listitem><para> |
| Select "C Managed Build" from the available options and |
| click "Next". |
| </para></listitem> |
| <listitem><para> |
| Expand "Yocto Project SDK Autotools Project". |
| </para></listitem> |
| <listitem><para> |
| Select "Hello World ANSI C Autotools Projects". |
| This is an Autotools-based project based on a Yocto |
| template. |
| </para></listitem> |
| <listitem><para> |
| Put a name in the "Project name:" field. |
| Do not use hyphens as part of the name |
| (e.g. "hello"). |
| </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='oxygen-configuring-the-cross-toolchains'> |
| <title>Configuring the Cross-Toolchains</title> |
| |
| <para> |
| The earlier section, |
| "<link linkend='oxygen-configuring-the-eclipse-yocto-plug-in'>Configuring the Oxygen 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='oxygen-configuring-the-eclipse-yocto-plug-in'>Configuring the Oxygen 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 "Apply and Close". |
| </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 |
| <ulink url='https://en.wikipedia.org/wiki/GNU_Build_System'>Autotools GNU utility programs</ulink> |
| such as Autoconf, Automake, and so forth in the |
| workspace for your project. |
| Click on the "Console" tab beneath your source code |
| to see the results of reconfiguring your project. |
| </para></listitem> |
| </orderedlist> |
| </para> |
| </section> |
| |
| <section id='oxygen-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 (i.e. |
| <filename>i586-poky-linux-gcc</filename> in this example). |
| <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 "File -> New" menu. |
| </para></listitem> |
| <listitem><para> |
| In the "New Folder" Dialog, click the "Advanced" |
| button and then activate "Link to |
| alternate location (linked folder)" button. |
| </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 "Finish" to save the linked folder. |
| </para></listitem> |
| </orderedlist> |
| </note> |
| </para> |
| </section> |
| |
| <section id='oxygen-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 Tasks 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 a new |
| shell 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='oxygen-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 |
| "C/C++Remote Application". |
| </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 "SSH", which |
| means Secure Socket Shell and then click "OK". |
| Optionally, you can select a TCF connection |
| instead. |
| </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 "192.168.7.2". |
| However, if a previous QEMU session did not exit |
| cleanly, the IP address increments (e.g. |
| "192.168.7.3"). |
| <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 "root", 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><replaceable>ProjectName</replaceable> |
| (e.g. <filename>/home/root/hello</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><title>Tips</title> |
| <itemizedlist> |
| <listitem><para> |
| 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. |
| </para></listitem> |
| <listitem><para> |
| If browsing to a directory fails or times |
| out, but you can |
| <filename>ssh</filename> into your QEMU |
| or target from the command line and you |
| have proxies set up, it is likely that |
| Eclipse is sending the SSH traffic to a |
| proxy. |
| In this case, either use TCF , or click on |
| "Configure proxy settings" in the |
| connection dialog and add the target IP |
| address to the "bypass proxy" section. |
| You might also need to change |
| "Active Provider" from Native to Manual. |
| </para></listitem> |
| </itemizedlist> |
| </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='oxygen-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> |
| </section> |
| </chapter> |
| <!-- |
| vim: expandtab tw=80 ts=4 |
| --> |