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+<title>GNU Compiler Collection (GCC) Internals: Configuration Files</title>
+
+<meta name="description" content="GNU Compiler Collection (GCC) Internals: Configuration Files">
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+<link href="Configuration.html#Configuration" rel="up" title="Configuration">
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+<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
+<a name="Configuration-Files"></a>
+<div class="header">
+<p>
+Previous: <a href="System-Config.html#System-Config" accesskey="p" rel="previous">System Config</a>, Up: <a href="Configuration.html#Configuration" accesskey="u" rel="up">Configuration</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="Files-Created-by-configure"></a>
+<h4 class="subsubsection">6.3.2.3 Files Created by <code>configure</code></h4>
+
+<p>Here we spell out what files will be set up by <samp>configure</samp> in the
+<samp>gcc</samp> directory.  Some other files are created as temporary files
+in the configuration process, and are not used in the subsequent
+build; these are not documented.
+</p>
+<ul>
+<li> <samp>Makefile</samp> is constructed from <samp>Makefile.in</samp>, together with
+the host and target fragments (see <a href="Fragments.html#Fragments">Makefile
+Fragments</a>) <samp>t-<var>target</var></samp> and <samp>x-<var>host</var></samp> from
+<samp>config</samp>, if any, and language Makefile fragments
+<samp><var>language</var>/Make-lang.in</samp>.
+</li><li> <samp>auto-host.h</samp> contains information about the host machine
+determined by <samp>configure</samp>.  If the host machine is different from
+the build machine, then <samp>auto-build.h</samp> is also created,
+containing such information about the build machine.
+</li><li> <samp>config.status</samp> is a script that may be run to recreate the
+current configuration.
+</li><li> <samp>configargs.h</samp> is a header containing details of the arguments
+passed to <samp>configure</samp> to configure GCC, and of the thread model
+used.
+</li><li> <samp>cstamp-h</samp> is used as a timestamp.
+</li><li> If a language <samp>config-lang.in</samp> file (see <a href="Front-End-Config.html#Front-End-Config">The Front End <samp>config-lang.in</samp> File</a>) sets <code>outputs</code>, then
+the files listed in <code>outputs</code> there are also generated.
+</li></ul>
+
+<p>The following configuration headers are created from the Makefile,
+using <samp>mkconfig.sh</samp>, rather than directly by <samp>configure</samp>.
+<samp>config.h</samp>, <samp>bconfig.h</samp> and <samp>tconfig.h</samp> all contain the
+<samp>xm-<var>machine</var>.h</samp> header, if any, appropriate to the host,
+build and target machines respectively, the configuration headers for
+the target, and some definitions; for the host and build machines,
+these include the autoconfigured headers generated by
+<samp>configure</samp>.  The other configuration headers are determined by
+<samp>config.gcc</samp>.  They also contain the typedefs for <code>rtx</code>,
+<code>rtvec</code> and <code>tree</code>.
+</p>
+<ul>
+<li> <samp>config.h</samp>, for use in programs that run on the host machine.
+</li><li> <samp>bconfig.h</samp>, for use in programs that run on the build machine.
+</li><li> <samp>tconfig.h</samp>, for use in programs and libraries for the target
+machine.
+</li><li> <samp>tm_p.h</samp>, which includes the header <samp><var>machine</var>-protos.h</samp>
+that contains prototypes for functions in the target
+<samp><var>machine</var>.c</samp> file.  The
+<samp><var>machine</var>-protos.h</samp> header is included after the <samp>rtl.h</samp>
+and/or <samp>tree.h</samp> would have been included.
+The <samp>tm_p.h</samp> also
+includes the header <samp>tm-preds.h</samp> which is generated by
+<samp>genpreds</samp> program during the build to define the declarations
+and inline functions for the predicate functions.
+</li></ul>
+
+<hr>
+<div class="header">
+<p>
+Previous: <a href="System-Config.html#System-Config" accesskey="p" rel="previous">System Config</a>, Up: <a href="Configuration.html#Configuration" accesskey="u" rel="up">Configuration</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>
+
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