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<a name="Subdirectories-of-gcc"></a>
<h4 class="subsection">6.3.1 Subdirectories of <samp>gcc</samp></h4>

<p>The <samp>gcc</samp> directory contains the following subdirectories:
</p>
<dl compact="compact">
<dt><samp><var>language</var></samp></dt>
<dd><p>Subdirectories for various languages.  Directories containing a file
<samp>config-lang.in</samp> are language subdirectories.  The contents of
the subdirectories <samp>c</samp> (for C), <samp>cp</samp> (for C++),
<samp>objc</samp> (for Objective-C), <samp>objcp</samp> (for Objective-C++),
and <samp>lto</samp> (for LTO) are documented in this
manual (see <a href="Passes.html#Passes">Passes and Files of the Compiler</a>);
those for other languages are not.  See <a href="Front-End.html#Front-End">Anatomy of a Language Front End</a>, for details of the files in these
directories.
</p>
</dd>
<dt><samp>common</samp></dt>
<dd><p>Source files shared between the compiler drivers (such as
<code>gcc</code>) and the compilers proper (such as <samp>cc1</samp>).  If an
architecture defines target hooks shared between those places, it also
has a subdirectory in <samp>common/config</samp>.  See <a href="Target-Structure.html#Target-Structure">Target Structure</a>.
</p>
</dd>
<dt><samp>config</samp></dt>
<dd><p>Configuration files for supported architectures and operating
systems.  See <a href="Back-End.html#Back-End">Anatomy of a Target Back End</a>, for
details of the files in this directory.
</p>
</dd>
<dt><samp>doc</samp></dt>
<dd><p>Texinfo documentation for GCC, together with automatically generated
man pages and support for converting the installation manual to
HTML.  See <a href="Documentation.html#Documentation">Documentation</a>.
</p>
</dd>
<dt><samp>ginclude</samp></dt>
<dd><p>System headers installed by GCC, mainly those required by the C
standard of freestanding implementations.  See <a href="Headers.html#Headers">Headers
Installed by GCC</a>, for details of when these and other headers are
installed.
</p>
</dd>
<dt><samp>po</samp></dt>
<dd><p>Message catalogs with translations of messages produced by GCC into
various languages, <samp><var>language</var>.po</samp>.  This directory also
contains <samp>gcc.pot</samp>, the template for these message catalogues,
<samp>exgettext</samp>, a wrapper around <code>gettext</code> to extract the
messages from the GCC sources and create <samp>gcc.pot</samp>, which is run
by &lsquo;<samp>make gcc.pot</samp>&rsquo;, and <samp>EXCLUDES</samp>, a list of files from
which messages should not be extracted.
</p>
</dd>
<dt><samp>testsuite</samp></dt>
<dd><p>The GCC testsuites (except for those for runtime libraries).
See <a href="Testsuites.html#Testsuites">Testsuites</a>.
</p></dd>
</dl>

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