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110 lines
6.4 KiB
HTML
110 lines
6.4 KiB
HTML
4 years ago
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<html lang="en">
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<head>
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<title>Configuration Files - GNU Compiler Collection (GCC) Internals</title>
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<meta http-equiv="Content-Type" content="text/html">
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<meta name="description" content="GNU Compiler Collection (GCC) Internals">
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<meta name="generator" content="makeinfo 4.13">
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<link title="Top" rel="start" href="index.html#Top">
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<link rel="up" href="Configuration.html#Configuration" title="Configuration">
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<link rel="prev" href="System-Config.html#System-Config" title="System Config">
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<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
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<!--
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Copyright (C) 1988-2015 Free Software Foundation, Inc.
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3 or
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any later version published by the Free Software Foundation; with the
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Invariant Sections being ``Funding Free Software'', the Front-Cover
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Texts being (a) (see below), and with the Back-Cover Texts being (b)
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(see below). A copy of the license is included in the section entitled
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``GNU Free Documentation License''.
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(a) The FSF's Front-Cover Text is:
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A GNU Manual
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(b) The FSF's Back-Cover Text is:
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You have freedom to copy and modify this GNU Manual, like GNU
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software. Copies published by the Free Software Foundation raise
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funds for GNU development.-->
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<style type="text/css"><!--
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--></style>
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</head>
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<body>
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<div class="node">
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<a name="Configuration-Files"></a>
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<p>
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Previous: <a rel="previous" accesskey="p" href="System-Config.html#System-Config">System Config</a>,
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Up: <a rel="up" accesskey="u" href="Configuration.html#Configuration">Configuration</a>
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<hr>
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</div>
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<h5 class="subsubsection">6.3.2.3 Files Created by <code>configure</code></h5>
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<p>Here we spell out what files will be set up by <samp><span class="file">configure</span></samp> in the
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<samp><span class="file">gcc</span></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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<ul>
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<li><samp><span class="file">Makefile</span></samp> is constructed from <samp><span class="file">Makefile.in</span></samp>, together with
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the host and target fragments (see <a href="Fragments.html#Fragments">Makefile Fragments</a>) <samp><span class="file">t-</span><var>target</var></samp> and <samp><span class="file">x-</span><var>host</var></samp> from
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<samp><span class="file">config</span></samp>, if any, and language Makefile fragments
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<samp><var>language</var><span class="file">/Make-lang.in</span></samp>.
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<li><samp><span class="file">auto-host.h</span></samp> contains information about the host machine
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determined by <samp><span class="file">configure</span></samp>. If the host machine is different from
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the build machine, then <samp><span class="file">auto-build.h</span></samp> is also created,
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containing such information about the build machine.
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<li><samp><span class="file">config.status</span></samp> is a script that may be run to recreate the
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current configuration.
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<li><samp><span class="file">configargs.h</span></samp> is a header containing details of the arguments
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passed to <samp><span class="file">configure</span></samp> to configure GCC, and of the thread model
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used.
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<li><samp><span class="file">cstamp-h</span></samp> is used as a timestamp.
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<li>If a language <samp><span class="file">config-lang.in</span></samp> file (see <a href="Front-End-Config.html#Front-End-Config">The Front End <samp><span class="file">config-lang.in</span></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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</ul>
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<p>The following configuration headers are created from the Makefile,
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using <samp><span class="file">mkconfig.sh</span></samp>, rather than directly by <samp><span class="file">configure</span></samp>.
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<samp><span class="file">config.h</span></samp>, <samp><span class="file">bconfig.h</span></samp> and <samp><span class="file">tconfig.h</span></samp> all contain the
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<samp><span class="file">xm-</span><var>machine</var><span class="file">.h</span></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><span class="file">configure</span></samp>. The other configuration headers are determined by
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<samp><span class="file">config.gcc</span></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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<ul>
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<li><samp><span class="file">config.h</span></samp>, for use in programs that run on the host machine.
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<li><samp><span class="file">bconfig.h</span></samp>, for use in programs that run on the build machine.
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<li><samp><span class="file">tconfig.h</span></samp>, for use in programs and libraries for the target
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machine.
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<li><samp><span class="file">tm_p.h</span></samp>, which includes the header <samp><var>machine</var><span class="file">-protos.h</span></samp>
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that contains prototypes for functions in the target
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<samp><var>machine</var><span class="file">.c</span></samp> file. The header <samp><var>machine</var><span class="file">-protos.h</span></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><span class="file">-protos.h</span></samp> is included after the <samp><span class="file">rtl.h</span></samp>
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and/or <samp><span class="file">tree.h</span></samp> would have been included. The <samp><span class="file">tm_p.h</span></samp> also
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includes the header <samp><span class="file">tm-preds.h</span></samp> which is generated by
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<samp><span class="file">genpreds</span></samp> program during the build to define the declarations
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and inline functions for the predicate functions.
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</ul>
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</body></html>
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