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<h4 class="subsection">6.3.1 Subdirectories of <samp><span class="file">gcc</span></samp></h4>
<p>The <samp><span class="file">gcc</span></samp> directory contains the following subdirectories:
<dl>
<dt><samp><var>language</var></samp><dd>Subdirectories for various languages. Directories containing a file
<samp><span class="file">config-lang.in</span></samp> are language subdirectories. The contents of
the subdirectories <samp><span class="file">c</span></samp> (for C), <samp><span class="file">cp</span></samp> (for C++),
<samp><span class="file">objc</span></samp> (for Objective-C), <samp><span class="file">objcp</span></samp> (for Objective-C++),
and <samp><span class="file">lto</span></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.
<br><dt><samp><span class="file">common</span></samp><dd>Source files shared between the compiler drivers (such as
<samp><span class="command">gcc</span></samp>) and the compilers proper (such as <samp><span class="file">cc1</span></samp>). If an
architecture defines target hooks shared between those places, it also
has a subdirectory in <samp><span class="file">common/config</span></samp>. See <a href="Target-Structure.html#Target-Structure">Target Structure</a>.
<br><dt><samp><span class="file">config</span></samp><dd>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.
<br><dt><samp><span class="file">doc</span></samp><dd>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>.
<br><dt><samp><span class="file">ginclude</span></samp><dd>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.
<br><dt><samp><span class="file">po</span></samp><dd>Message catalogs with translations of messages produced by GCC into
various languages, <samp><var>language</var><span class="file">.po</span></samp>. This directory also
contains <samp><span class="file">gcc.pot</span></samp>, the template for these message catalogues,
<samp><span class="file">exgettext</span></samp>, a wrapper around <samp><span class="command">gettext</span></samp> to extract the
messages from the GCC sources and create <samp><span class="file">gcc.pot</span></samp>, which is run
by ‘<samp><span class="samp">make gcc.pot</span></samp>’, and <samp><span class="file">EXCLUDES</span></samp>, a list of files from
which messages should not be extracted.
<br><dt><samp><span class="file">testsuite</span></samp><dd>The GCC testsuites (except for those for runtime libraries).
See <a href="Testsuites.html#Testsuites">Testsuites</a>.
</dl>
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