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