"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>
-<title>Yocto Project Kernel Architecture and Use Manual</title>
+<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='package'>
- <title>Introduction</title>
+<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>
- The Yocto Project presents the kernel as a fully patched, history-clean git
- repository.
- The git tree represents the selected features, board support,
- and configurations extensively tested by Yocto Project.
- The Yocto Project kernel allows the end user to leverage community
- best practices to seamlessly manage the development, build and debug cycles.
+ As an example, consider a scenario where you are using OPKG and you want to add
+ the libglade package to sysroot.
</para>
<para>
- This manual describes the Yocto Project kernel by providing information
- on its history, organization, benefits, and use.
- The manual consists of two sections:
- <itemizedlist>
- <listitem><para>Concepts - Describes concepts behind the kernel.
- You will understand how the kernel is organized and why it is organized in
- the way it is. You will understand the benefits of the kernel's organization
- and the mechanisms used to work with the kernel and how to apply it in your
- design process.</para></listitem>
- <listitem><para>Using the Kernel - Describes best practices and "how-to" information
- that lets you put the kernel to practical use. Some examples are "How to Build a
- Project Specific Tree", "How to Examine Changes in a Branch", and "Saving Kernel
- Modifications."</para></listitem>
- </itemizedlist>
+ 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>
- For more information on the kernel, see the following links:
- <itemizedlist>
- <listitem><para><ulink url='http://ldn.linuxfoundation.org/book/1-a-guide-kernel-development-process'></ulink></para></listitem>
- <listitem><para><ulink url='http://userweb.kernel.org/~akpm/stuff/tpp.txt'></ulink></para></listitem>
- <listitem><para><ulink url='http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=blob_plain;f=Documentation/HOWTO;hb=HEAD'></ulink></para></listitem>
- </itemizedlist>
- <para>
- You can find more information on Yocto Project by visiting the website at
- <ulink url='http://www.yoctoproject.org'></ulink>.
- </para>
+ Next, source the environment setup script.
+ Follow that by setting up the installation destination to point to your
+ sysroot as <filename><sysroot dir></filename>.
+ Finally, have an opkg configuration file <filename><conf file></filename>
+ that corresponds to the opkg repository you have just created.
+ The following command forms should now work:
+ <literallayout class='monospaced'>
+ $ opkg-cl –f <conf file> -o <sysroot dir> update
+ $ opkg-cl –f <conf file>> -o <sysroot dir> --force-overwrite install libglade
+ $ opkg-cl –f <conf file> -o <sysroot dir> --force-overwrite install libglade-dbg
+ $ opkg-cl –f <conf file> -o <sysroot dir> --force-overwrite install libglade-dev
+ </literallayout>
</para>
</section>
-
-
-
-
-
-
-
</chapter>
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