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-<!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; ] >
-
-<appendix id='sdk-appendix-obtain'>
-
-<title>Obtaining the SDK</title>
-
-<section id='sdk-locating-pre-built-sdk-installers'>
- <title>Locating Pre-Built SDK Installers</title>
-
- <para>
- You can use existing, pre-built toolchains by locating and running
- an SDK installer script that ships with the Yocto Project.
- Using this method, you select and download an architecture-specific
- toolchain installer and then run the script to hand-install the
- toolchain.
- </para>
-
- <para>
- You can find SDK installers here:
- <itemizedlist>
- <listitem><para><emphasis>Standard SDK Installers</emphasis>
- Go to <ulink url='&YOCTO_TOOLCHAIN_DL_URL;'></ulink>
- and find the folder that matches your host development system
- (i.e. <filename>i686</filename> for 32-bit machines or
- <filename>x86_64</filename> for 64-bit machines).</para>
-
- <para>Go into that folder and download the toolchain installer
- whose name includes the appropriate target architecture.
- The toolchains provided by the Yocto Project are based off of
- the <filename>core-image-sato</filename> image and contain
- libraries appropriate for developing against that image.
- For example, if your host development system is a 64-bit x86
- system and you are going to use your cross-toolchain for a
- 32-bit x86 target, go into the <filename>x86_64</filename>
- folder and download the following installer:
- <literallayout class='monospaced'>
- poky-glibc-x86_64-core-image-sato-i586-toolchain-&DISTRO;.sh
- </literallayout>
- </para></listitem>
- <listitem><para><emphasis>Extensible SDK Installers</emphasis>
- Installers for the extensible SDK are in
- <ulink url='&YOCTO_TOOLCHAIN_DL_URL;'></ulink>.
- </para></listitem>
- </itemizedlist>
- </para>
-</section>
-
-<section id='sdk-building-an-sdk-installer'>
- <title>Building an SDK Installer</title>
-
- <para>
- As an alternative to locating and downloading a toolchain installer,
- you can build the toolchain installer assuming you have first sourced
- the environment setup script.
- See the
- "<ulink url='&YOCTO_DOCS_QS_URL;#qs-building-images'>Building Images</ulink>"
- section in the Yocto Project Quick Start for steps that show you
- how to set up the Yocto Project environment.
- In particular, you need to be sure the
- <ulink url='&YOCTO_DOCS_REF_URL;#var-MACHINE'><filename>MACHINE</filename></ulink>
- variable matches the architecture for which you are building and that
- the
- <ulink url='&YOCTO_DOCS_REF_URL;#var-SDKMACHINE'><filename>SDKMACHINE</filename></ulink>
- variable is correctly set if you are building a toolchain designed to
- run on an architecture that differs from your current development host
- machine (i.e. the build machine).
- </para>
-
- <para>
- To build the toolchain installer for a standard SDK and populate
- the SDK image, use the following command:
- <literallayout class='monospaced'>
- $ bitbake <replaceable>image</replaceable> -c populate_sdk
- </literallayout>
- You can do the same for the extensible SDK using this command:
- <literallayout class='monospaced'>
- $ bitbake <replaceable>image</replaceable> -c populate_sdk_ext
- </literallayout>
- These commands result in a toolchain installer that contains the sysroot
- that matches your target root filesystem.
- </para>
-
- <para>
- When the <filename>bitbake</filename> command completes, the toolchain
- installer will be in
- <filename>tmp/deploy/sdk</filename> in the Build Directory.
- <note>
- By default, this toolchain does not build static binaries.
- If you want to use the toolchain to build these types of libraries,
- you need to be sure your image has the appropriate static
- development libraries.
- Use the
- <ulink url='&YOCTO_DOCS_REF_URL;#var-IMAGE_INSTALL'><filename>IMAGE_INSTALL</filename></ulink>
- variable inside your <filename>local.conf</filename> file to
- install the appropriate library packages.
- Following is an example using <filename>glibc</filename> static
- development libraries:
- <literallayout class='monospaced'>
- IMAGE_INSTALL_append = " glibc-staticdev"
- </literallayout>
- </note>
- </para>
-</section>
-
-<section id='sdk-extracting-the-root-filesystem'>
- <title>Extracting the Root Filesystem</title>
-
- <para>
- After installing the toolchain, for some use cases you
- might need to separately extract a root filesystem:
- <itemizedlist>
- <listitem><para>You want to boot the image using NFS.
- </para></listitem>
- <listitem><para>You want to use the root filesystem as the
- target sysroot.
- For example, the Eclipse IDE environment with the Eclipse
- Yocto Plug-in installed allows you to use QEMU to boot
- under NFS.</para></listitem>
- <listitem><para>You want to develop your target application
- using the root filesystem as the target sysroot.
- </para></listitem>
- </itemizedlist>
- </para>
-
- <para>
- To extract the root filesystem, first <filename>source</filename>
- the cross-development environment setup script to establish
- necessary environment variables.
- If you built the toolchain in the Build Directory, you will find
- the toolchain environment script in the
- <filename>tmp</filename> directory.
- If you installed the toolchain by hand, the environment setup
- script is located in <filename>/opt/poky/&DISTRO;</filename>.
- </para>
-
- <para>
- After sourcing the environment script, use the
- <filename>runqemu-extract-sdk</filename> command and provide the
- filesystem image.
- </para>
-
- <para>
- Following is an example.
- The second command sets up the environment.
- In this case, the setup script is located in the
- <filename>/opt/poky/&DISTRO;</filename> directory.
- The third command extracts the root filesystem from a previously
- built filesystem that is located in the
- <filename>~/Downloads</filename> directory.
- Furthermore, this command extracts the root filesystem into the
- <filename>qemux86-sato</filename> directory:
- <literallayout class='monospaced'>
- $ cd ~
- $ source /opt/poky/&DISTRO;/environment-setup-i586-poky-linux
- $ runqemu-extract-sdk \
- ~/Downloads/core-image-sato-sdk-qemux86-2011091411831.rootfs.tar.bz2 \
- $HOME/qemux86-sato
- </literallayout>
- You could now point to the target sysroot at
- <filename>qemux86-sato</filename>.
- </para>
-</section>
-
-<section id='sdk-installed-standard-sdk-directory-structure'>
- <title>Installed Standard SDK Directory Structure</title>
-
- <para>
- The following figure shows the resulting directory structure after
- you install the Standard SDK by running the <filename>.sh</filename>
- SDK installation script:
- </para>
-
- <para>
- <imagedata fileref="figures/sdk-installed-standard-sdk-directory.png" scale="60" align="center" />
- </para>
-
- <para>
- The installed SDK consists of an environment setup script for the SDK,
- a configuration file for the target, a version file for the target,
- and the root filesystem (<filename>sysroots</filename>) needed to
- develop objects for the target system.
- </para>
-
- <para>
- Within the figure, italicized text is used to indicate replaceable
- portions of the file or directory name.
- For example,
- <replaceable>install_dir</replaceable>/<replaceable>version</replaceable>
- is the directory where the SDK is installed.
- By default, this directory is <filename>/opt/poky/</filename>.
- And, <replaceable>version</replaceable> represents the specific
- snapshot of the SDK (e.g. <filename>&DISTRO;+snapshot</filename>).
- Furthermore, <replaceable>target</replaceable> represents the target
- architecture (e.g. <filename>i586</filename>) and
- <replaceable>host</replaceable> represents the development system's
- architecture (e.g. <filename>x86_64</filename>).
- Thus, the complete names of the two directories within the
- <filename>sysroots</filename> could be
- <filename>i586-poky-linux</filename> and
- <filename>x86_64-pokysdk-linux</filename> for the target and host,
- respectively.
- </para>
-</section>
-
-<section id='sdk-installed-extensible-sdk-directory-structure'>
- <title>Installed Extensible SDK Directory Structure</title>
-
- <para>
- The following figure shows the resulting directory structure after
- you install the Extensible SDK by running the <filename>.sh</filename>
- SDK installation script:
- </para>
-
- <para>
- <imagedata fileref="figures/sdk-installed-extensible-sdk-directory.png" scale="60" align="center" />
- </para>
-
- <para>
- The installed directory structure for the extensible SDK is quite
- different than the installed structure for the standard SDK.
- The extensible SDK does not separate host and target parts in the
- same manner as does the standard SDK.
- The extensible SDK uses an embedded copy of the OpenEmbedded
- build system, which has its own sysroots.
- </para>
-
- <para>
- Of note in the directory structure are an environment setup script
- for the SDK, a configuration file for the target, a version file for
- the target, and a log file for the OpenEmbedded build system
- preparation script run by the installer.
- </para>
-
- <para>
- Within the figure, italicized text is used to indicate replaceable
- portions of the file or directory name.
- For example,
- <replaceable>install_dir</replaceable> is the directory where the SDK
- is installed, which is <filename>poky_sdk</filename> by default.
- <replaceable>target</replaceable> represents the target
- architecture (e.g. <filename>i586</filename>) and
- <replaceable>host</replaceable> represents the development system's
- architecture (e.g. <filename>x86_64</filename>).
- </para>
-</section>
-
-</appendix>
-<!--
-vim: expandtab tw=80 ts=4
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