documentation/yocto-project-qs/yocto-project-qs.xml: General edits to YP QS.
Revised the manual for better grammar and more technically accurate wordings. Worked closely with Scott Garman on the revision. Signed-off-by: Scott Rifenbark <scott@scott-desktop.(none)>
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@ -160,14 +160,14 @@
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autoconf automake
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</literallayout>
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<para>
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<emphasis>NOTE:</emphasis> Packages vary in number and name for other Linux distributions.
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<note><para>
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Packages vary in number and name for other Linux distributions.
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The commands here should work. We are interested, though, to learn what works for you.
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You can find more information for package requirements on common Linux distributions
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at <ulink url="http://wiki.openembedded.net/index.php/OEandYourDistro"></ulink>.
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However, you should be careful when using this information as the information applies
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to old Linux distributions that are known to not work with a current Poky install.
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</para>
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</para></note>
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</section>
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<section id='releases'>
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@ -216,15 +216,16 @@
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</mediaobject>
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<para>
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Use the following commands from a shell on your Debian-based host to build your image.
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The build creates an entire Linux system including the Toolchain from the source.
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Use the following commands to build your image.
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The build process creates an entire Linux distribution, including the toolchain, from source.
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</para>
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<para><emphasis>NOTE:</emphasis> The build process using Sato currently consumes
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50GB of disk space.
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To allow for variations in the build process and for future package expansion we
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recommend 100GB of free disk space.
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</para>
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<note><para>
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The build process using Sato currently consumes
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about 50GB of disk space.
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To allow for variations in the build process and for future package expansion, we
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recommend having at least 100GB of free disk space.
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</para></note>
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<para>
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<literallayout class='monospaced'>
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@ -235,52 +236,56 @@
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</para>
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<itemizedlist>
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<listitem><para>The first two commands extract the Yocto Project files from the
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release area and place them into a subdirectory of your current directory
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(<command>poky-4.0-build</command> in this example).</para></listitem>
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<listitem><para>The <command>$ source</command> command creates the directory and places
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you there.
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The build directory contains all the object files used during the build.
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The default build directory is <command>poky-4.0-build</command>.
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Note that you can change the target architecture by editing the
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<command><build_directory>/conf/local.conf</command> file.
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By default the target architecture is qemux86.</para></listitem>
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release tarball and place them into a subdirectory of your current directory.</para></listitem>
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<listitem><para>The <command>source</command> command creates the
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<filename>poky-4.0-build</filename> directory and executes the <command>cd</command>
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command to make <filename>poky-4.0-build</filename> the working directory.
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The resulting build directory contains all the files created during the build.
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By default the target architecture is qemux86.
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To change this default, edit the value of the MACHINE variable in the
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<filename>conf/local.conf</filename> file.</para></listitem>
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</itemizedlist>
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<para>
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Now might be a good time to edit the <command>conf/local.conf</command>
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file.
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The defaults should all be fine. However, you might want to look at the variables
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BB_NUMBER_THREADS and PARALLEL_MAKE.
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Take some time to examine your <filename>conf/local.conf</filename> file.
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The defaults should work fine.
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However, if you have a multi-core CPU you might want to set the variables
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BB_NUMBER_THREADS and PARALLEL_MAKE to the number of processor cores on your build machine.
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By default, these variables are commented out.
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</para>
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<para>
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Continue with the following command to build the OS image for the target, which is
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poky-image-sato in this example.
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Continue with the following command to build an OS image for the target, which is
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<filename>poky-image-sato</filename> in this example.
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<literallayout class='monospaced'>
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$ bitbake poky-image-sato
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</literallayout>
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<emphasis>NOTE:</emphasis> If you are running Fedora 14 or another distribution
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with GNU make 3.82 you might have to run the following two
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<command>$bitbake</command> commands instead:
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<literallayout class='monospaced'>
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<note><para>
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If you are running Fedora 14 or another distribution
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that ships with GNU make v3.82 you need to run the following two
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<command>bitbake</command> commands instead:
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<literallayout class='monospaced'>
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$ bitbake make-native
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$ bitbake poky-image-sato
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</literallayout>
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</literallayout>
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</para></note>
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The final command runs the image:
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<literallayout class='monospaced'>
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$ poky-qemu qemux86
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</literallayout>
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The build process could take several hours the first time you run it.
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Depending on the number of processors and cores, the amount or RAM, the speed of your
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internet connection and other factors.
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After the initial build, subsequent builds run much faster.
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<note><para>
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Depending on the number of processors and cores, the amount or RAM, the speed of your
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Internet connection and other factors, the build process could take several hours the first
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time you run it.
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Subsequent builds run much faster since parts of the build are cached.
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</para></note>
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</para>
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</section>
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<section id='using-pre-built'>
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<title>Using Pre-Built Binaries and QEMU</title>
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<para>
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If hardware, libraries and services are stable you can use a pre-built binary of the image, kernel and toolchain and just run it on the target using the emulator QEMU.
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This situation is perfect for developing application software.
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If hardware, libraries and services are stable you can get started by using a pre-built binary
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of the image, kernel and toolchain and run it using the emulator QEMU.
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This scenario is useful for developing application software.
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</para>
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<para></para>
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<itemizedlist>
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<listitem>
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<para>
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Install the standalone Yocto toolchain tarball.
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Install the stand-alone Yocto toolchain tarball.
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</para>
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</listitem>
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<listitem>
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<para>
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Download the pre-built kernel that will run on QEMU.
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You need to be sure to get the QEMU image that matches your target machine’s architecture (e.g. x86, ARM, etc.).
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Download the pre-built kernel that will boot with QEMU.
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You need to be sure to get the QEMU image that matches your target machine’s
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architecture (e.g. x86, ARM, etc.).
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</para>
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</listitem>
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<listitem>
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<para>
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Download and decompress the file image system.
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Download the filesystem image for your target machine's architecture.
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</para>
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</listitem>
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</itemizedlist>
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<para>
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You can download the pre-built toolchain, which includes the poky-qemu script and support files, from <ulink url='http://yoctoproject.org/downloads/yocto-0.9/toolchain/'></ulink>. These are available for i586 (32-bit) and x86_64 (64 bit) host machines, targeting each of the five supported target architectures. The tarballs are self contained and install into <filename>/opt/poky</filename>.
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Use these commands to install the toolchain tarball (taking the 64 bit host, 32 bit i586 target as an example):
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You can download the pre-built toolchain, which includes the poky-qemu script and
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support files, from <ulink url='http://yoctoproject.org/downloads/yocto-0.9/toolchain/'></ulink>.
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Toolchains are available for 32-bit and 64-bit development systems from the
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<filename>i586</filename> and <filename>x86_64</filename> folders, respectively.
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Each type of development system supports five target architectures.
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The tarball files are named such that a string representing the host system appears
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first in the filename and then is immediately followed by a string representing
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the target architecture.
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</para>
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<literallayout class='monospaced'>
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yocto-eglibc<<emphasis>host_system</emphasis>>-<<emphasis>arch</emphasis>>-toolchain-sdk-<<emphasis>release</emphasis>>.tar.bz2
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Where:
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<<emphasis>host_system</emphasis>> is a string representing your development system:
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i586 or x86_64.
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<<emphasis>arch</emphasis>> is a string representing the target architecture:
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i585, x86_64, powerpc, mips, or arm.
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<<emphasis>release</emphasis>> is the version of Yocto Project.
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</literallayout>
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<para>
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For example, the following toolchain tarball is for a 64-bit development
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host system and a 32-bit target architecture:
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</para>
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<literallayout class='monospaced'>
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yocto-eglibc-x86_64-i586-toolchain-sdk-0.9.tar.bz2
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</literallayout>
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<para>
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The toolchain tarballs are self-contained and should be installed into <filename>/opt/poky</filename>.
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The following commands show how you install the toolchain tarball given a 64-bit development host system
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and a 32-bit target architecture.
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</para>
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<para>
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</para>
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<para>
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You can download the pre-built Linux kernel and the file image system suitable for
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You can download the pre-built Linux kernel and the filesystem image suitable for
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running in the emulator QEMU from
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<ulink url='http://yoctoproject.org/downloads/yocto-0.9/qemu'></ulink>.
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Be sure to use the kernel and file image system that matches the architecture you want
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Be sure to use the kernel and filesystem image that matches the architecture you want
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to simulate.
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</para>
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<para>
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The kernel and file image system have the following forms, respectively:
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</para>
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<literallayout class='monospaced'>
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*zImage*qemu*.bin
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yocto-image-*-qemu*.ext3.bz2
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</literallayout>
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<para>
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You must decompress the file image system using the following command:
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Most kernel files have the following form:
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</para>
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<literallayout class='monospaced'>
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$ bzip2 -d
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*zImage*qemu<<emphasis>arch</emphasis>>*.bin
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Where:
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<<emphasis>arch</emphasis>> is a string representing the target architecture:
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x86, x86-64, ppc, mips, or arm.
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</literallayout>
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<para>
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You can now start the emulator using these commands (assuming an 32 bit i586 target):
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The filesystem image has two forms.
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One form is an <filename>ext3</filename> filesystem image.
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The other form is a tarball of the filesystem and is booted using user-space NFS.
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Here are the respective forms:
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</para>
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<literallayout class='monospaced'>
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yocto-image-<<emphasis>profile</emphasis>>-qemu<<emphasis>arch</emphasis>>.rootfs.ext3
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yocto-image-<<emphasis>profile</emphasis>>-qemu<<emphasis>arch</emphasis>>.rootfs.tar.bz2
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Where:
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<<emphasis>profile</emphasis>> is the filesystem image's profile:
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sdk, sato, minimal, or lsb.
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<<emphasis>arch</emphasis>> is a string representing the target architecture:
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x86, x86-64, ppc, mips, or arm.
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</literallayout>
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<para>
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The following command form sets up the emulation environment.
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</para>
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<literallayout class='monospaced'>
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$ source /opt/poky/environment-setup-<<emphasis>arch</emphasis>>-poky-linux
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Where:
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<<emphasis>arch</emphasis>> is a string representing the target architecture:
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i586, x86-64, ppc, mips, or arm.
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</literallayout>
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<para>
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Finally, this command form invokes the QEMU emulator
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</para>
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<literallayout class='monospaced'>
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$ poky-qemu <<emphasis>qemuarch</emphasis>> <<emphasis>kernel</emphasis>> <<emphasis>image</emphasis>> <<emphasis>fstype</emphasis>>
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Where:
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<<emphasis>qemuarch</emphasis>> is a string representing the target architecture: qemux86, qemux86-64,
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qemuppc, qemumips, or qemuarm.
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<<emphasis>kernel</emphasis>> is the architecture-specific kernel.
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<<emphasis>image</emphasis>> is the .ext3 filesystem image.
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<<emphasis>fstype</emphasis>> is the filesystem type.
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</literallayout>
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<para>
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Continuing with the example, the following two commands setup the emulation
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environment and launch QEMu.
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The kernel and filesystem are for a 32-bit target architecture.
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</para>
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<literallayout class='monospaced'>
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$ source /opt/poky/environment-setup-i586-poky-linux
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$ poky-qemu <<emphasis>qemuarch</emphasis>> <<emphasis>kernel</emphasis>> <<emphasis>image</emphasis>> <<emphasis>fstype</emphasis>>
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</literallayout>
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<para>
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For example:
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</para>
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<literallayout class='monospaced'>
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$ poky-qemu qemuppc zImage-2.6.34-qemuppc-0.9 \
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yocto-image-minimal-qemuppc-0.9.rootfs.ext3 ext3
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$ poky-qemu qemui586 zImage-2.6.34-qemux86-0.9 yocto-image-sdk-qemux86-0.9.rootfs.ext3 ext3
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</literallayout>
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</section>
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