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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"
[<!ENTITY % poky SYSTEM "../poky.ent"> %poky; ] >
<chapter id='ref-varlocality'>
<title>Variable Context</title>
<para>
While most variables can be used in almost any context such as
<filename>.conf</filename>, <filename>.bbclass</filename>,
<filename>.inc</filename>, and <filename>.bb</filename> files,
some variables are often associated with a particular locality or context.
This chapter describes some common associations.
</para>
<section id='ref-varlocality-configuration'>
<title>Configuration</title>
<para>
The following subsections provide lists of variables whose context is
configuration: distribution, machine, and local.
</para>
<section id='ref-varlocality-config-distro'>
<title>Distribution (Distro)</title>
<para>
This section lists variables whose context is the distribution, or distro.
<itemizedlist>
<listitem><para><filename><link linkend='var-DISTRO'>DISTRO</link></filename></para></listitem>
<listitem><para><filename><link linkend='var-DISTRO_NAME'>DISTRO_NAME</link></filename>
</para></listitem>
<listitem><para><filename><link linkend='var-DISTRO_VERSION'>DISTRO_VERSION</link>
</filename></para></listitem>
<listitem><para><filename><link linkend='var-MAINTAINER'>MAINTAINER</link></filename>
</para></listitem>
<listitem><para><filename><link linkend='var-PACKAGE_CLASSES'>PACKAGE_CLASSES</link>
</filename></para></listitem>
<listitem><para><filename><link linkend='var-TARGET_OS'>TARGET_OS</link></filename>
</para></listitem>
<listitem><para><filename><link linkend='var-TARGET_FPU'>TARGET_FPU</link></filename>
</para></listitem>
<listitem><para><filename><link linkend='var-TCMODE'>TCMODE</link></filename>
</para></listitem>
<listitem><para><filename><link linkend='var-TCLIBC'>TCLIBC</link></filename>
</para></listitem>
</itemizedlist>
</para>
</section>
<section id='ref-varlocality-config-machine'>
<title>Machine</title>
<para>
This section lists variables whose context is the machine.
<itemizedlist>
<listitem><para><filename><link linkend='var-TARGET_ARCH'>TARGET_ARCH</link></filename>
</para></listitem>
<listitem><para><filename><link linkend='var-SERIAL_CONSOLE'>SERIAL_CONSOLE</link>
</filename></para></listitem>
<listitem><para><filename><link linkend='var-PACKAGE_EXTRA_ARCHS'>PACKAGE_EXTRA_ARCHS</link>
</filename></para></listitem>
<listitem><para><filename><link linkend='var-IMAGE_FSTYPES'>IMAGE_FSTYPES</link>
</filename></para></listitem>
<listitem><para><filename><link linkend='var-MACHINE_FEATURES'>MACHINE_FEATURES</link>
</filename></para></listitem>
<listitem><para><filename><link linkend='var-MACHINE_EXTRA_RDEPENDS'>MACHINE_EXTRA_RDEPENDS
</link></filename></para></listitem>
<listitem><para><filename><link linkend='var-MACHINE_EXTRA_RRECOMMENDS'>MACHINE_EXTRA_RRECOMMENDS
</link></filename></para></listitem>
<listitem><para><filename><link linkend='var-MACHINE_ESSENTIAL_EXTRA_RDEPENDS'>MACHINE_ESSENTIAL_EXTRA_RDEPENDS
</link></filename></para></listitem>
<listitem><para><filename><link linkend='var-MACHINE_ESSENTIAL_EXTRA_RRECOMMENDS'>
MACHINE_ESSENTIAL_EXTRA_RRECOMMENDS</link></filename></para></listitem>
</itemizedlist>
</para>
</section>
<section id='ref-varlocality-config-local'>
<title>Local</title>
<para>
This section lists variables whose context is the local configuration through the
<filename>local.conf</filename> file.
<itemizedlist>
<listitem><para><filename><link linkend='var-DISTRO'>DISTRO</link></filename>
</para></listitem>
<listitem><para><filename><link linkend='var-MACHINE'>MACHINE</link></filename>
</para></listitem>
<listitem><para><filename><link linkend='var-DL_DIR'>DL_DIR</link></filename>
</para></listitem>
<listitem><para><filename><link linkend='var-BBFILES'>BBFILES</link></filename>
</para></listitem>
<listitem><para><filename><link linkend='var-EXTRA_IMAGE_FEATURES'>EXTRA_IMAGE_FEATURES
</link></filename></para></listitem>
<listitem><para><filename><link linkend='var-PACKAGE_CLASSES'>PACKAGE_CLASSES</link>
</filename></para></listitem>
<listitem><para><filename><link linkend='var-BB_NUMBER_THREADS'>BB_NUMBER_THREADS</link>
</filename></para></listitem>
<listitem><para><filename><link linkend='var-BBINCLUDELOGS'>BBINCLUDELOGS</link>
</filename></para></listitem>
<listitem><para><filename><link linkend='var-ENABLE_BINARY_LOCALE_GENERATION'>
ENABLE_BINARY_LOCALE_GENERATION</link></filename></para></listitem>
</itemizedlist>
</para>
</section>
</section>
<section id='ref-varlocality-recipes'>
<title>Recipes</title>
<para>
The following subsections provide lists of variables whose context is
recipes: required, dependencies, path, and extra build information.
</para>
<section id='ref-varlocality-recipe-required'>
<title>Required</title>
<para>
This section lists variables that are required for recipes.
<itemizedlist>
<listitem><para><filename><link linkend='var-LICENSE'>LICENSE</link>
</filename></para></listitem>
<listitem><para><filename><link linkend='var-LIC_FILES_CHKSUM'>LIC_FILES_CHKSUM</link>
</filename></para></listitem>
<listitem><para><filename><link linkend='var-SRC_URI'>SRC_URI</link></filename> - used
in recipes that fetch local or remote files.
</para></listitem>
</itemizedlist>
</para>
</section>
<section id='ref-varlocality-recipe-dependencies'>
<title>Dependencies</title>
<para>
This section lists variables that define recipe dependencies.
<itemizedlist>
<listitem><para><filename><link linkend='var-DEPENDS'>DEPENDS</link>
</filename></para></listitem>
<listitem><para><filename><link linkend='var-RDEPENDS'>RDEPENDS</link>
</filename></para></listitem>
<listitem><para><filename><link linkend='var-RRECOMMENDS'>RRECOMMENDS</link>
</filename></para></listitem>
<listitem><para><filename><link linkend='var-RCONFLICTS'>RCONFLICTS</link>
</filename></para></listitem>
<listitem><para><filename><link linkend='var-RREPLACES'>RREPLACES</link>
</filename></para></listitem>
</itemizedlist>
</para>
</section>
<section id='ref-varlocality-recipe-paths'>
<title>Paths</title>
<para>
This section lists variables that define recipe paths.
<itemizedlist>
<listitem><para><filename><link linkend='var-WORKDIR'>WORKDIR</link>
</filename></para></listitem>
<listitem><para><filename><link linkend='var-S'>S</link>
</filename></para></listitem>
<listitem><para><filename><link linkend='var-FILES'>FILES</link>
</filename></para></listitem>
</itemizedlist>
</para>
</section>
<section id='ref-varlocality-recipe-build'>
<title>Extra Build Information</title>
<para>
This section lists variables that define extra build information for recipes.
<itemizedlist>
<listitem><para><filename><link linkend='var-EXTRA_OECMAKE'>EXTRA_OECMAKE</link>
</filename></para></listitem>
<listitem><para><filename><link linkend='var-EXTRA_OECONF'>EXTRA_OECONF</link>
</filename></para></listitem>
<listitem><para><filename><link linkend='var-EXTRA_OEMAKE'>EXTRA_OEMAKE</link>
</filename></para></listitem>
<listitem><para><filename><link linkend='var-PACKAGES'>PACKAGES</link></filename>
</para></listitem>
<listitem><para><filename><link linkend='var-DEFAULT_PREFERENCE'>DEFAULT_PREFERENCE
</link></filename></para></listitem>
</itemizedlist>
</para>
</section>
</section>
</chapter>
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