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authorRichard Purdie <richard.purdie@linuxfoundation.org>2011-04-20 14:20:19 +0100
committerRichard Purdie <richard.purdie@linuxfoundation.org>2011-04-20 15:49:17 +0100
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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">
-
-<chapter id='adt-package'>
-<title>Optionally Customizing the Development Packages Installation</title>
- <para>
- Because the Yocto Project is suited for embedded Linux development it is
- likely that you will need to customize your development packages installation.
- For example, if you are developing a minimal image then you might not need
- certain packages (e.g. graphics support packages).
- Thus, you would like to be able to remove those packages from your sysroot.
- </para>
-
-<section id='package-management-systems'>
- <title>Package Management Systems</title>
- <para>
- The Yocto Project supports the generation of root filesystem files using
- three different Package Management Systems (PMS):
- <itemizedlist>
- <listitem><para><emphasis>OPKG</emphasis> – A less well known PMS whose use
- originated in the OpenEmbedded and OpenWrt embedded Linux projects.
- This PMS works with files packaged in an <filename>.ipk</filename> format.
- See <ulink url='http://en.wikipedia.org/wiki/Opkg'></ulink> for more
- information about OPKG.</para></listitem>
- <listitem><para><emphasis>RPM</emphasis> – A more widely known PMS intended for GNU/Linux
- distributions.
- This PMS works with files packaged in an <filename>.rms</filename> format.
- The Yocto Project currently installs through this PMS by default.
- See <ulink url='http://en.wikipedia.org/wiki/RPM_Package_Manager'></ulink>
- for more information about RPM.</para></listitem>
- <listitem><para><emphasis>Debian</emphasis> – The PMS for Debian-based systems
- is built on many PMS tools.
- The lower-level PMS tool dpkg forms the base of the Debian PMS.
- For information on dpkg see
- <ulink url='http://en.wikipedia.org/wiki/Dpkg'></ulink>.</para></listitem>
- </itemizedlist>
- </para>
-</section>
-
-<section id='configuring-the-pms'>
- <title>Configuring the PMS</title>
- <para>
- Whichever PMS you are using you need to be sure that the
- <filename>PACKAGE_CLASSES</filename> variable in the <filename>conf/local.conf</filename>
- file is set to reflect that system.
- The first value you choose for the variable specifies the package file format for the root
- filesystem.
- Additional values specify additional formats for convenience or testing.
- See the configuration file for details.
- </para>
- <para>
- As an example, consider a scenario where you are using OPKG and you want to add
- the libglade package to sysroot.
- </para>
- <para>
- First, you should generate the ipk file for the libglade package and add it
- into a working opkg repository.
- Use these commands:
- <literallayout class='monospaced'>
- $ bitbake libglade
- $ bitbake package-index
- </literallayout>
- </para>
- <para>
- Next, source the environment setup script.
- Follow that by setting up the installation destination to point to your
- sysroot as <filename>&lt;sysroot dir&gt;</filename>.
- Finally, have an opkg configuration file <filename>&lt;conf file&gt;</filename>
- that corresponds to the opkg repository you have just created.
- The following command forms should now work:
- <literallayout class='monospaced'>
- $ opkg-cl –f &lt;conf file&gt; -o &lt;sysroot dir&gt; update
- $ opkg-cl –f &lt;conf file&gt;> -o &lt;sysroot dir&gt; --force-overwrite install libglade
- $ opkg-cl –f &lt;conf file&gt; -o &lt;sysroot dir&gt; --force-overwrite install libglade-dbg
- $ opkg-cl –f &lt;conf file&gt; -o &lt;sysroot dir&gt; --force-overwrite install libglade-dev
- </literallayout>
- </para>
-</section>
-</chapter>
-<!--
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