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+<title>GNU Compiler Collection (GCC) Internals: Front End Directory</title>
+
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+<link href="Option-Index.html#Option-Index" rel="index" title="Option Index">
+<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
+<link href="Front-End.html#Front-End" rel="up" title="Front End">
+<link href="Front-End-Config.html#Front-End-Config" rel="next" title="Front End Config">
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+<div class="header">
+<p>
+Next: <a href="Front-End-Config.html#Front-End-Config" accesskey="n" rel="next">Front End Config</a>, Up: <a href="Front-End.html#Front-End" accesskey="u" rel="up">Front End</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p>
+</div>
+<hr>
+<a name="The-Front-End-language-Directory"></a>
+<h4 class="subsubsection">6.3.8.1 The Front End <samp><var>language</var></samp> Directory</h4>
+
+<p>A front end <samp><var>language</var></samp> directory contains the source files
+of that front end (but not of any runtime libraries, which should be
+outside the <samp>gcc</samp> directory).  This includes documentation, and
+possibly some subsidiary programs built alongside the front end.
+Certain files are special and other parts of the compiler depend on
+their names:
+</p>
+<dl compact="compact">
+<dt><samp>config-lang.in</samp></dt>
+<dd><p>This file is required in all language subdirectories.  See <a href="Front-End-Config.html#Front-End-Config">The Front End <samp>config-lang.in</samp> File</a>, for details of
+its contents
+</p></dd>
+<dt><samp>Make-lang.in</samp></dt>
+<dd><p>This file is required in all language subdirectories.  See <a href="Front-End-Makefile.html#Front-End-Makefile">The Front End <samp>Make-lang.in</samp> File</a>, for details of its
+contents.
+</p></dd>
+<dt><samp>lang.opt</samp></dt>
+<dd><p>This file registers the set of switches that the front end accepts on
+the command line, and their <samp>--help</samp> text.  See <a href="Options.html#Options">Options</a>.
+</p></dd>
+<dt><samp>lang-specs.h</samp></dt>
+<dd><p>This file provides entries for <code>default_compilers</code> in
+<samp>gcc.cc</samp> which override the default of giving an error that a
+compiler for that language is not installed.
+</p></dd>
+<dt><samp><var>language</var>-tree.def</samp></dt>
+<dd><p>This file, which need not exist, defines any language-specific tree
+codes.
+</p></dd>
+</dl>
+
+
+
+
+</body>
+</html>