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148 lines
6.9 KiB
HTML
148 lines
6.9 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<!-- Copyright (C) 1988-2018 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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<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>Files (GNU Compiler Collection (GCC) Internals)</title>
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<meta name="description" content="Files (GNU Compiler Collection (GCC) Internals)">
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<meta name="keywords" content="Files (GNU Compiler Collection (GCC) Internals)">
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<meta name="resource-type" content="document">
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<meta name="distribution" content="global">
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<meta name="Generator" content="makeinfo">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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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="Type-Information.html#Type-Information" rel="up" title="Type Information">
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<link href="Invoking-the-garbage-collector.html#Invoking-the-garbage-collector" rel="next" title="Invoking the garbage collector">
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<link href="GGC-Roots.html#GGC-Roots" rel="prev" title="GGC Roots">
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<style type="text/css">
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</style>
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</head>
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<body lang="en">
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<a name="Files"></a>
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<div class="header">
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<p>
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Next: <a href="Invoking-the-garbage-collector.html#Invoking-the-garbage-collector" accesskey="n" rel="next">Invoking the garbage collector</a>, Previous: <a href="GGC-Roots.html#GGC-Roots" accesskey="p" rel="prev">GGC Roots</a>, Up: <a href="Type-Information.html#Type-Information" accesskey="u" rel="up">Type Information</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="Source-Files-Containing-Type-Information"></a>
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<h3 class="section">23.5 Source Files Containing Type Information</h3>
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<a name="index-generated-files"></a>
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<a name="index-files_002c-generated"></a>
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<p>Whenever you add <code>GTY</code> markers to a source file that previously
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had none, or create a new source file containing <code>GTY</code> markers,
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there are three things you need to do:
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</p>
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<ol>
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<li> You need to add the file to the list of source files the type
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machinery scans. There are four cases:
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<ol type="a" start="1">
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<li> For a back-end file, this is usually done
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automatically; if not, you should add it to <code>target_gtfiles</code> in
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the appropriate port’s entries in <samp>config.gcc</samp>.
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</li><li> For files shared by all front ends, add the filename to the
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<code>GTFILES</code> variable in <samp>Makefile.in</samp>.
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</li><li> For files that are part of one front end, add the filename to the
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<code>gtfiles</code> variable defined in the appropriate
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<samp>config-lang.in</samp>.
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Headers should appear before non-headers in this list.
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</li><li> For files that are part of some but not all front ends, add the
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filename to the <code>gtfiles</code> variable of <em>all</em> the front ends
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that use it.
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</li></ol>
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</li><li> If the file was a header file, you’ll need to check that it’s included
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in the right place to be visible to the generated files. For a back-end
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header file, this should be done automatically. For a front-end header
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file, it needs to be included by the same file that includes
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<samp>gtype-<var>lang</var>.h</samp>. For other header files, it needs to be
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included in <samp>gtype-desc.c</samp>, which is a generated file, so add it to
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<code>ifiles</code> in <code>open_base_file</code> in <samp>gengtype.c</samp>.
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<p>For source files that aren’t header files, the machinery will generate a
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header file that should be included in the source file you just changed.
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The file will be called <samp>gt-<var>path</var>.h</samp> where <var>path</var> is the
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pathname relative to the <samp>gcc</samp> directory with slashes replaced by
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<tt>-</tt>, so for example the header file to be included in
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<samp>cp/parser.c</samp> is called <samp>gt-cp-parser.c</samp>. The
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generated header file should be included after everything else in the
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source file. Don’t forget to mention this file as a dependency in the
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<samp>Makefile</samp>!
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</p>
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</li></ol>
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<p>For language frontends, there is another file that needs to be included
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somewhere. It will be called <samp>gtype-<var>lang</var>.h</samp>, where
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<var>lang</var> is the name of the subdirectory the language is contained in.
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</p>
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<p>Plugins can add additional root tables. Run the <code>gengtype</code>
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utility in plugin mode as <code>gengtype -P pluginout.h <var>source-dir</var>
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<var>file-list</var> <var>plugin*.c</var></code> with your plugin files
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<var>plugin*.c</var> using <code>GTY</code> to generate the <var>pluginout.h</var> file.
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The GCC build tree is needed to be present in that mode.
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</p>
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<hr>
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<div class="header">
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<p>
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Next: <a href="Invoking-the-garbage-collector.html#Invoking-the-garbage-collector" accesskey="n" rel="next">Invoking the garbage collector</a>, Previous: <a href="GGC-Roots.html#GGC-Roots" accesskey="p" rel="prev">GGC Roots</a>, Up: <a href="Type-Information.html#Type-Information" accesskey="u" rel="up">Type Information</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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</html>
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