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Took care of links as well. (From yocto-docs rev: a338dc13ebbcdc77fb16e36f12eb5f0e1e05187f) Signed-off-by: Scott Rifenbark <srifenbark@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
445 lines
22 KiB
XML
445 lines
22 KiB
XML
<!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"
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[<!ENTITY % poky SYSTEM "../poky.ent"> %poky; ] >
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<appendix id='sdk-appendix-obtain'>
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<title>Obtaining the SDK</title>
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<section id='sdk-locating-pre-built-sdk-installers'>
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<title>Locating Pre-Built SDK Installers</title>
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<para>
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You can use existing, pre-built toolchains by locating and running
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an SDK installer script that ships with the Yocto Project.
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Using this method, you select and download an architecture-specific
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SDK installer and then run the script to hand-install the
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toolchain.
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</para>
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<para>
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Follow these steps to locate and hand-install the toolchain:
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<orderedlist>
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<listitem><para>
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<emphasis>Go to the Installers Directory:</emphasis>
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Go to <ulink url='&YOCTO_TOOLCHAIN_DL_URL;'></ulink>
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</para></listitem>
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<listitem><para>
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<emphasis>Open the Folder for Your Build Host:</emphasis>
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Open the folder that matches your
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<ulink url='&YOCTO_DOCS_REF_URL;#build-system-term'>build host</ulink>
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(i.e. <filename>i686</filename> for 32-bit machines or
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<filename>x86_64</filename> for 64-bit machines).
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</para></listitem>
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<listitem><para>
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<emphasis>Locate and Download the SDK Installer:</emphasis>
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You need to find and download the installer appropriate for
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your build host, target hardware, and image type.
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</para>
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<para>The installer files (<filename>*.sh</filename>) follow
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this naming convention:
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<literallayout class='monospaced'>
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poky-glibc-<replaceable>host_system</replaceable>-core-image-<replaceable>type</replaceable>-<replaceable>arch</replaceable>-toolchain[-ext]-<replaceable>release</replaceable>.sh
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Where:
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<replaceable>host_system</replaceable> is a string representing your development system:
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"i686" or "x86_64"
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<replaceable>type</replaceable> is a string representing the image:
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"sato" or "minimal"
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<replaceable>arch</replaceable> is a string representing the target architecture:
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"aarch64", "armv5e", "core2-64", "coretexa8hf-neon", "i586", "mips32r2",
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"mips64", or "ppc7400"
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<replaceable>release</replaceable> is the version of Yocto Project.
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NOTE:
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The standard SDK installer does not have the "-ext" string as
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part of the filename.
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</literallayout>
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The toolchains provided by the Yocto Project are based off of
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the <filename>core-image-sato</filename> and
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<filename>core-image-minimal</filename> images and contain
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libraries appropriate for developing against those images.
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</para>
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<para>For example, if your build host is a 64-bit x86 system
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and you need an extended SDK for a 64-bit core2 target, go
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into the <filename>x86_64</filename> folder and download the
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following installer:
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<literallayout class='monospaced'>
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poky-glibc-x86_64-core-image-sato-core2-64-toolchain-ext-&DISTRO;.sh
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</literallayout>
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</para></listitem>
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<listitem><para>
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<emphasis>Run the Installer:</emphasis>
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Be sure you have execution privileges and run the installer.
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Following is an example from the <filename>Downloads</filename>
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directory:
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<literallayout class='monospaced'>
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$ ~/Downloads/poky-glibc-x86_64-core-image-sato-core2-64-toolchain-ext-&DISTRO;.sh
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</literallayout>
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During execution of the script, you choose the root location
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for the toolchain.
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See the
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"<link linkend='sdk-installed-standard-sdk-directory-structure'>Installed Standard SDK Directory Structure</link>"
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section and the
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"<link linkend='sdk-installed-extensible-sdk-directory-structure'>Installed Extensible SDK Directory Structure</link>"
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section for more information.
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</para></listitem>
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</orderedlist>
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</para>
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</section>
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<section id='sdk-building-an-sdk-installer'>
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<title>Building an SDK Installer</title>
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<para>
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As an alternative to locating and downloading an SDK installer,
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you can build the SDK installer.
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Follow these steps:
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<orderedlist>
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<listitem><para>
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<emphasis>Set Up the Build Environment:</emphasis>
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Be sure you are set up to use BitBake in a shell.
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See the
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"<ulink url='&YOCTO_DOCS_DEV_URL;#dev-preparing-the-build-host'>Preparing the Build Host</ulink>"
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section in the Yocto Project Development Tasks Manual for
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information on how to get a build host ready that is either a
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native Linux machine or a machine that uses CROPS.
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</para></listitem>
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<listitem><para>
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<emphasis>Clone the <filename>poky</filename> Repository:</emphasis>
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You need to have a local copy of the Yocto Project
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<ulink url='&YOCTO_DOCS_REF_URL;#source-directory'>Source Directory</ulink>
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(i.e. a local <filename>poky</filename> repository).
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See the
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"<ulink url='&YOCTO_DOCS_DEV_URL;#cloning-the-poky-repository'>Cloning the <filename>poky</filename> Repository</ulink>"
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and possibly the
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"<ulink url='&YOCTO_DOCS_DEV_URL;#checking-out-by-branch-in-poky'>Checking Out by Branch in Poky</ulink>"
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and
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"<ulink url='&YOCTO_DOCS_DEV_URL;#checkout-out-by-tag-in-poky'>Checking Out by Tag in Poky</ulink>"
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sections all in the Yocto Project Development Tasks Manual for
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information on how to clone the <filename>poky</filename>
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repository and check out the appropriate branch for your work.
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</para></listitem>
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<listitem><para>
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<emphasis>Initialize the Build Environment:</emphasis>
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While in the root directory of the Source Directory (i.e.
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<filename>poky</filename>), run the
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<ulink url='&YOCTO_DOCS_REF_URL;#structure-core-script'><filename>&OE_INIT_FILE;</filename></ulink>
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environment setup script to define the OpenEmbedded
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build environment on your build host.
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<literallayout class='monospaced'>
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$ source &OE_INIT_FILE;
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</literallayout>
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Among other things, the script creates the
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<ulink url='&YOCTO_DOCS_REF_URL;#build-directory'>Build Directory</ulink>,
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which is <filename>build</filename> in this case
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and is located in the Source Directory.
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After the script runs, your current working directory
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is set to the <filename>build</filename> directory.
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</para></listitem>
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<listitem><para>
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<emphasis>Make Sure You Are Building an Installer for the Correct Machine:</emphasis>
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Check to be sure that your
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<ulink url='&YOCTO_DOCS_REF_URL;#var-MACHINE'><filename>MACHINE</filename></ulink>
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variable in the <filename>local.conf</filename> file in your
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Build Directory matches the architecture for which you are
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building.
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</para></listitem>
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<listitem><para>
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<emphasis>Make Sure Your SDK Machine is Correctly Set:</emphasis>
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If you are building a toolchain designed to run on an
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architecture that differs from your current development host
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machine (i.e. the build host), be sure that the
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<ulink url='&YOCTO_DOCS_REF_URL;#var-SDKMACHINE'><filename>SDKMACHINE</filename></ulink>
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variable in the <filename>local.conf</filename> file in your
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Build Directory is correctly set.
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<note>
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If you are building an SDK installer for the Extensible
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SDK, the <filename>SDKMACHINE</filename> value must be
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set for the architecture of the machine you are using to
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build the installer.
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If <filename>SDKMACHINE</filename> is not set appropriately,
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the build fails and provides an error message similar to
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the following:
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<literallayout class='monospaced'>
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The extensible SDK can currently only be built for the same architecture as the machine being built on - SDK_ARCH is
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set to i686 (likely via setting SDKMACHINE) which is different from the architecture of the build machine (x86_64).
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Unable to continue.
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</literallayout>
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</note>
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</para></listitem>
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<listitem><para>
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<emphasis>Build the SDK Installer:</emphasis>
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To build the SDK installer for a standard SDK and populate
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the SDK image, use the following command form.
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Be sure to replace <replaceable>image</replaceable> with
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an image (e.g. "core-image-sato"):
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<literallayout class='monospaced'>
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$ bitbake <replaceable>image</replaceable> -c populate_sdk
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</literallayout>
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You can do the same for the extensible SDK using this command
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form:
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<literallayout class='monospaced'>
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$ bitbake <replaceable>image</replaceable> -c populate_sdk_ext
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</literallayout>
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These commands produce an SDK installer that contains the
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sysroot that matches your target root filesystem.</para>
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<para>When the <filename>bitbake</filename> command completes,
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the SDK installer will be in
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<filename>tmp/deploy/sdk</filename> in the Build Directory.
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<note><title>Notes</title>
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<itemizedlist>
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<listitem><para>
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By default, the previous BitBake command does not
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build static binaries.
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If you want to use the toolchain to build these
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types of libraries, you need to be sure your SDK
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has the appropriate static development libraries.
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Use the
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<ulink url='&YOCTO_DOCS_REF_URL;#var-TOOLCHAIN_TARGET_TASK'><filename>TOOLCHAIN_TARGET_TASK</filename></ulink>
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variable inside your <filename>local.conf</filename>
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file before building the SDK installer.
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Doing so ensures that the eventual SDK installation
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process installs the appropriate library packages
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as part of the SDK.
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Following is an example using
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<filename>libc</filename> static development
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libraries:
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<literallayout class='monospaced'>
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TOOLCHAIN_TARGET_TASK_append = " libc-staticdev"
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</literallayout>
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</para></listitem>
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</itemizedlist>
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</note>
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</para></listitem>
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<listitem><para>
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<emphasis>Run the Installer:</emphasis>
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You can now run the SDK installer from
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<filename>tmp/deploy/sdk</filename> in the Build Directory.
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Following is an example:
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<literallayout class='monospaced'>
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$ cd ~/poky/build/tmp/deploy/sdk
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$ ./poky-glibc-x86_64-core-image-sato-core2-64-toolchain-ext-&DISTRO;.sh
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</literallayout>
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During execution of the script, you choose the root location
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for the toolchain.
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See the
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"<link linkend='sdk-installed-standard-sdk-directory-structure'>Installed Standard SDK Directory Structure</link>"
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section and the
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"<link linkend='sdk-installed-extensible-sdk-directory-structure'>Installed Extensible SDK Directory Structure</link>"
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section for more information.
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</para></listitem>
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</orderedlist>
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</para>
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</section>
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<section id='sdk-extracting-the-root-filesystem'>
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<title>Extracting the Root Filesystem</title>
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<para>
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After installing the toolchain, for some use cases you
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might need to separately extract a root filesystem:
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<itemizedlist>
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<listitem><para>
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You want to boot the image using NFS.
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</para></listitem>
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<listitem><para>
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You want to use the root filesystem as the
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target sysroot.
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</para></listitem>
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<listitem><para>
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You want to develop your target application
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using the root filesystem as the target sysroot.
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</para></listitem>
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</itemizedlist>
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</para>
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<para>
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Follow these steps to extract the root filesystem:
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<orderedlist>
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<listitem><para>
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<emphasis>Locate and Download the Tarball for the Pre-Built
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Root Filesystem Image File:</emphasis>
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You need to find and download the root filesystem image
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file that is appropriate for your target system.
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These files are kept in machine-specific folders in the
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<ulink url='&YOCTO_DL_URL;/releases/yocto/yocto-&DISTRO;/machines/'>Index of Releases</ulink>
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in the "machines" directory.</para>
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<para>The machine-specific folders of the "machines" directory
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contain tarballs (<filename>*.tar.bz2</filename>) for supported
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machines.
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These directories also contain flattened root filesystem
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image files (<filename>*.ext4</filename>), which you can use
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with QEMU directly.</para>
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<para>The pre-built root filesystem image files
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follow these naming conventions:
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<literallayout class='monospaced'>
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<!--
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core-image-<replaceable>profile</replaceable>-<replaceable>arch</replaceable>-<replaceable>date_time</replaceable>.rootfs.tar.bz2
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-->
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core-image-<replaceable>profile</replaceable>-<replaceable>arch</replaceable>.tar.bz2
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Where:
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<replaceable>profile</replaceable> is the filesystem image's profile:
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lsb, lsb-dev, lsb-sdk, minimal, minimal-dev, minimal-initramfs,
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sato, sato-dev, sato-sdk, sato-sdk-ptest. For information on
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these types of image profiles, see the "<ulink url='&YOCTO_DOCS_REF_URL;#ref-images'>Images</ulink>" chapter in
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the Yocto Project Reference Manual.
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<replaceable>arch</replaceable> is a string representing the target architecture:
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beaglebone-yocto, beaglebone-yocto-lsb, edgerouter, edgerouter-lsb,
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genericx86, genericx86-64, genericx86-64-lsb, genericx86-lsb,
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mpc8315e-rdb, mpc8315e-rdb-lsb, and qemu*.
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<!-->
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<replaceable>date_time</replaceable> is a date and time stamp.
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-->
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</literallayout>
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The root filesystems provided by the Yocto Project are based
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off of the <filename>core-image-sato</filename> and
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<filename>core-image-minimal</filename> images.
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</para>
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<para>For example, if you plan on using a BeagleBone device
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as your target hardware and your image is a
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<filename>core-image-sato-sdk</filename>
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image, you can download the following file:
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<literallayout class='monospaced'>
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core-image-sato-sdk-beaglebone-yocto.tar.bz2
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</literallayout>
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</para></listitem>
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<listitem><para>
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<emphasis>Initialize the Cross-Development Environment:</emphasis>
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You must <filename>source</filename> the cross-development
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environment setup script to establish necessary environment
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variables.</para>
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<para>This script is located in the top-level directory in
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which you installed the toolchain (e.g.
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<filename>poky_sdk</filename>).</para>
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<para>Following is an example based on the toolchain installed
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in the
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"<link linkend='sdk-locating-pre-built-sdk-installers'>Locating Pre-Built SDK Installers</link>"
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section:
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<literallayout class='monospaced'>
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$ source ~/poky_sdk/environment-setup-core2-64-poky-linux
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</literallayout>
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</para></listitem>
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<listitem><para>
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<emphasis>Extract the Root Filesystem:</emphasis>
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Use the <filename>runqemu-extract-sdk</filename> command
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and provide the root filesystem image.</para>
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<para>Following is an example command that extracts the root
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filesystem from a previously built root filesystem image that
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was downloaded from the
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<ulink url='&YOCTO_DOCS_OM_URL;#index-downloads'>Index of Releases</ulink>.
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This command extracts the root filesystem into the
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<filename>core2-64-sato</filename> directory:
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<literallayout class='monospaced'>
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$ runqemu-extract-sdk ~/Downloads/core-image-sato-sdk-beaglebone-yocto.tar.bz2 ~/beaglebone-sato
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</literallayout>
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You could now point to the target sysroot at
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<filename>beablebone-sato</filename>.
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</para></listitem>
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</orderedlist>
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</para>
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</section>
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<section id='sdk-installed-standard-sdk-directory-structure'>
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<title>Installed Standard SDK Directory Structure</title>
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<para>
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The following figure shows the resulting directory structure after
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you install the Standard SDK by running the <filename>*.sh</filename>
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SDK installation script:
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</para>
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<para>
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<imagedata fileref="figures/sdk-installed-standard-sdk-directory.png" scale="80" align="center" />
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</para>
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<para>
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The installed SDK consists of an environment setup script for the SDK,
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a configuration file for the target, a version file for the target,
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and the root filesystem (<filename>sysroots</filename>) needed to
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develop objects for the target system.
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</para>
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<para>
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Within the figure, italicized text is used to indicate replaceable
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portions of the file or directory name.
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For example,
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<replaceable>install_dir</replaceable>/<replaceable>version</replaceable>
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is the directory where the SDK is installed.
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By default, this directory is <filename>/opt/poky/</filename>.
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And, <replaceable>version</replaceable> represents the specific
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snapshot of the SDK (e.g. <filename>&DISTRO;</filename>).
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Furthermore, <replaceable>target</replaceable> represents the target
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architecture (e.g. <filename>i586</filename>) and
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<replaceable>host</replaceable> represents the development system's
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architecture (e.g. <filename>x86_64</filename>).
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Thus, the complete names of the two directories within the
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<filename>sysroots</filename> could be
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<filename>i586-poky-linux</filename> and
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<filename>x86_64-pokysdk-linux</filename> for the target and host,
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respectively.
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</para>
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</section>
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|
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<section id='sdk-installed-extensible-sdk-directory-structure'>
|
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<title>Installed Extensible SDK Directory Structure</title>
|
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<para>
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The following figure shows the resulting directory structure after
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you install the Extensible SDK by running the <filename>*.sh</filename>
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SDK installation script:
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</para>
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<para>
|
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<imagedata fileref="figures/sdk-installed-extensible-sdk-directory.png" scale="80" align="center" />
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</para>
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<para>
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The installed directory structure for the extensible SDK is quite
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different than the installed structure for the standard SDK.
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The extensible SDK does not separate host and target parts in the
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same manner as does the standard SDK.
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The extensible SDK uses an embedded copy of the OpenEmbedded
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build system, which has its own sysroots.
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</para>
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<para>
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Of note in the directory structure are an environment setup script
|
|
for the SDK, a configuration file for the target, a version file for
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the target, and log files for the OpenEmbedded build system
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preparation script run by the installer and BitBake.
|
|
</para>
|
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|
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<para>
|
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Within the figure, italicized text is used to indicate replaceable
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portions of the file or directory name.
|
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For example,
|
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<replaceable>install_dir</replaceable> is the directory where the SDK
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is installed, which is <filename>poky_sdk</filename> by default, and
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<replaceable>target</replaceable> represents the target
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architecture (e.g. <filename>i586</filename>).
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</para>
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</section>
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</appendix>
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<!--
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vim: expandtab tw=80 ts=4
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|
-->
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