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114 lines
5.2 KiB
HTML
114 lines
5.2 KiB
HTML
4 years ago
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<!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) 1987-2018 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. A copy of
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the license is included in the
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section entitled "GNU Free Documentation License".
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This manual contains no Invariant Sections. The Front-Cover Texts are
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(a) (see below), and the Back-Cover Texts are (b) (see below).
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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>Traditional Mode (The C Preprocessor)</title>
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<meta name="description" content="Traditional Mode (The C Preprocessor)">
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<meta name="keywords" content="Traditional Mode (The C Preprocessor)">
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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="Index-of-Directives.html#Index-of-Directives" rel="index" title="Index of Directives">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="index.html#Top" rel="up" title="Top">
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<link href="Traditional-lexical-analysis.html#Traditional-lexical-analysis" rel="next" title="Traditional lexical analysis">
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<link href="Preprocessor-Output.html#Preprocessor-Output" rel="prev" title="Preprocessor Output">
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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="Traditional-Mode"></a>
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<div class="header">
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<p>
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Next: <a href="Implementation-Details.html#Implementation-Details" accesskey="n" rel="next">Implementation Details</a>, Previous: <a href="Preprocessor-Output.html#Preprocessor-Output" accesskey="p" rel="prev">Preprocessor Output</a>, Up: <a href="index.html#Top" accesskey="u" rel="up">Top</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index-of-Directives.html#Index-of-Directives" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="Traditional-Mode-1"></a>
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<h2 class="chapter">10 Traditional Mode</h2>
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<p>Traditional (pre-standard) C preprocessing is rather different from
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the preprocessing specified by the standard. When the preprocessor
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is invoked with the
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<samp>-traditional-cpp</samp> option, it attempts to emulate a traditional
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preprocessor.
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</p>
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<p>This mode is not useful for compiling C code with GCC,
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but is intended for use with non-C preprocessing applications. Thus
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traditional mode semantics are supported only when invoking
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the preprocessor explicitly, and not in the compiler front ends.
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</p>
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<p>The implementation does not correspond precisely to the behavior of
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early pre-standard versions of GCC, nor to any true traditional preprocessor.
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After all, inconsistencies among traditional implementations were a
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major motivation for C standardization. However, we intend that it
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should be compatible with true traditional preprocessors in all ways
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that actually matter.
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</p>
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<table class="menu" border="0" cellspacing="0">
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<tr><td align="left" valign="top">• <a href="Traditional-lexical-analysis.html#Traditional-lexical-analysis" accesskey="1">Traditional lexical analysis</a>:</td><td> </td><td align="left" valign="top">
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</td></tr>
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<tr><td align="left" valign="top">• <a href="Traditional-macros.html#Traditional-macros" accesskey="2">Traditional macros</a>:</td><td> </td><td align="left" valign="top">
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</td></tr>
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<tr><td align="left" valign="top">• <a href="Traditional-miscellany.html#Traditional-miscellany" accesskey="3">Traditional miscellany</a>:</td><td> </td><td align="left" valign="top">
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</td></tr>
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<tr><td align="left" valign="top">• <a href="Traditional-warnings.html#Traditional-warnings" accesskey="4">Traditional warnings</a>:</td><td> </td><td align="left" valign="top">
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</td></tr>
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</table>
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</body>
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</html>
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