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<?xml version="1.0" encoding="UTF-8"?>
<chapter id="chapter_getting_oe">
<title>Getting Started</title>
<section id="gettingoe_directory_setup">
<title>OpenEmbedded Directory Structure</title>
<para>Before you begin downloading OpenEmbedded, you need to setup your
working environment.</para>
<para>The first step is to decide where on your system you wish to
work. This document will use the <varname>$OEBASE</varname> variable to
denote the base directory of the OpenEmbedded environment. For
example, <varname>$OEBASE</varname> could
be <literal>/home/joe/work/oe</literal>.</para>
<para>The base directory of your OpenEmbedded environment
(<varname>$OEBASE</varname>) is the location where sources will be checked
out (or unpacked). You must choose a location with <emphasis>no symlinks
above it</emphasis>.</para>
<para>To create the directory structure:
<screen>
$ mkdir -p $OEBASE/build/conf
$ cd $OEBASE</screen>
The <literal>$OEBASE/build</literal> directory will contain your
local configurations and extensions to the OpenEmbedded system which allow
you to build your applications and images.
</para>
<para>The <varname>$OEBASE</varname> will also contain both bitbake/ and
openembedded/ directories. These will be discussed in
<xref linkend="gettingoe_getting_bitbake"/> and
<xref linkend="gettingoe_getting_oe"/>.
</para>
</section>
<section id="gettingoe_getting_bitbake">
<title>Getting <application>BitBake</application></title>
<para>Before using OE, you must first obtain the build tool it needs:
bitbake.</para>
<para>It is recommended to run bitbake without installing it, as a sibling
directory of <literal>openembedded/</literal>
and <literal>build/</literal> directories. Indeed, as bitbake is written
in python it does not need compilation for being used. You'll just have to
set the PATH variable so that the BitBake tools are accessible (see
<xref linkend="gettingoe_configuring_oe"/>).</para>
<section><title>Getting <application>BitBake</application> Using Subversion</title>
<para>To checkout the latest version of the BitBake 1.8 branch, use the
following command:
<screen>
$ cd $OEBASE
$ <command>svn</command> co svn://svn.berlios.de/bitbake/branches/bitbake-1.8/ bitbake
</screen>
</para>
<para><application>BitBake</application> is checked out now and
the <varname>$OEBASE</varname> directory will contain
a <literal>bitbake/</literal> subdirectory.</para>
<para>If you need to access a Subversion server through a proxy, see the
<ulink url="http://subversion.tigris.org/faq.html#proxy">SVN FAQ</ulink>
</para>
</section>
<section><title>Updating <application>BitBake</application></title>
<para>Bitbake is being revised fairly often. Periodically it's a good
idea to check the repository of bitbake stable branches to see if a
new stable branch is available or if the current branch has been
revised. Compare your existing bitbake directory with the latest
bitbake branch in the repository. Your existing bitbake branch and
its 'last changed revision' number can be found as follows:
<screen>$ cd $OEBASE/bitbake; svn info</screen>
If there is a new stable branch, you will want to move or delete
your existing bitbake directory and repeat the process listed above
under "To obtain bitbake". If there is no new branch, it is easy to
update bitbake:
<screen>$ cd $OEBASE/bitbake; svn update</screen>
</para>
</section>
</section>
<section id="gettingoe_getting_oe">
<title>Getting OpenEmbedded</title>
<para>The OpenEmbedded metadata has a high rate of development, so it's a
good idea to stay up to date. You'll need monotone 0.28 to get the
metadata and stay up to date. Monotone is available in most distributions
and has binaries at <ulink url="http://venge.net/monotone/">Monotone
homepage</ulink>.</para>
<para>Next step is getting snapshot of database. <screen>
wget http://openembedded.org/snapshots/OE.mtn.bz2 http://openembedded.org/snapshots/OE.mtn.bz2.md5
</screen> Or if you have monotone 0.30 or later: <screen>
wget http://www.openembedded.org/snapshots/OE-this-is-for-mtn-0.30.mtn.bz2
wget http://www.openembedded.org/snapshots/OE-this-is-for-mtn-0.30.mtn.bz2.md5
</screen> Then verify integrity of snapshot by checking md5sum. <screen>
md5sum -c OE.mtn.bz2.md5sum
</screen> Then unpack database. <screen>
bunzip OE.mtn.bz2
</screen> Finally checkout the development branch. <screen>
mtn --db=OE.mtn co -b org.openembedded.dev
</screen></para>
</section>
<section id="gettingoe_configuring_oe">
<title>Configuring OpenEmbedded</title>
<para>This section is a stub, help us by expanding it</para>
</section>
<section id="gettingoe_building_software">
<title>Building Software</title>
<para>Once BitBake and OpenEmbedded are set up and configured, one can build
software and images like this:
<screen>
bitbake <recipe_name>
</screen>
</para>
<para>This section is a stub, help us by expanding it</para>
</section>
</chapter>
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