You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
83 lines
3.6 KiB
HTML
83 lines
3.6 KiB
HTML
4 years ago
|
<html lang="en">
|
||
|
|
<head>
|
||
|
|
<title>Traditional Mode - The C Preprocessor</title>
|
||
|
|
<meta http-equiv="Content-Type" content="text/html">
|
||
|
|
<meta name="description" content="The C Preprocessor">
|
||
|
|
<meta name="generator" content="makeinfo 4.13">
|
||
|
|
<link title="Top" rel="start" href="index.html#Top">
|
||
|
|
<link rel="prev" href="Preprocessor-Output.html#Preprocessor-Output" title="Preprocessor Output">
|
||
|
|
<link rel="next" href="Implementation-Details.html#Implementation-Details" title="Implementation Details">
|
||
|
|
<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
|
||
|
|
<!--
|
||
|
|
Copyright (C) 1987-2015 Free Software Foundation, Inc.
|
||
|
|
|
||
|
|
Permission is granted to copy, distribute and/or modify this document
|
||
|
|
under the terms of the GNU Free Documentation License, Version 1.3 or
|
||
|
|
any later version published by the Free Software Foundation. A copy of
|
||
|
|
the license is included in the
|
||
|
|
section entitled ``GNU Free Documentation License''.
|
||
|
|
|
||
|
|
This manual contains no Invariant Sections. The Front-Cover Texts are
|
||
|
|
(a) (see below), and the Back-Cover Texts are (b) (see below).
|
||
|
|
|
||
|
|
(a) The FSF's Front-Cover Text is:
|
||
|
|
|
||
|
|
A GNU Manual
|
||
|
|
|
||
|
|
(b) The FSF's Back-Cover Text is:
|
||
|
|
|
||
|
|
You have freedom to copy and modify this GNU Manual, like GNU
|
||
|
|
software. Copies published by the Free Software Foundation raise
|
||
|
|
funds for GNU development.
|
||
|
|
-->
|
||
|
|
<meta http-equiv="Content-Style-Type" content="text/css">
|
||
|
|
<style type="text/css"><!--
|
||
|
|
pre.display { font-family:inherit }
|
||
|
|
pre.format { font-family:inherit }
|
||
|
|
pre.smalldisplay { font-family:inherit; font-size:smaller }
|
||
|
|
pre.smallformat { font-family:inherit; font-size:smaller }
|
||
|
|
pre.smallexample { font-size:smaller }
|
||
|
|
pre.smalllisp { font-size:smaller }
|
||
|
|
span.sc { font-variant:small-caps }
|
||
|
|
span.roman { font-family:serif; font-weight:normal; }
|
||
|
|
span.sansserif { font-family:sans-serif; font-weight:normal; }
|
||
|
|
--></style>
|
||
|
|
</head>
|
||
|
|
<body>
|
||
|
|
<div class="node">
|
||
|
|
<a name="Traditional-Mode"></a>
|
||
|
|
<p>
|
||
|
|
Next: <a rel="next" accesskey="n" href="Implementation-Details.html#Implementation-Details">Implementation Details</a>,
|
||
|
|
Previous: <a rel="previous" accesskey="p" href="Preprocessor-Output.html#Preprocessor-Output">Preprocessor Output</a>,
|
||
|
|
Up: <a rel="up" accesskey="u" href="index.html#Top">Top</a>
|
||
|
|
<hr>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<h2 class="chapter">10 Traditional Mode</h2>
|
||
|
|
|
||
|
|
<p>Traditional (pre-standard) C preprocessing is rather different from
|
||
|
|
the preprocessing specified by the standard. When GCC is given the
|
||
|
|
<samp><span class="option">-traditional-cpp</span></samp> option, it attempts to emulate a traditional
|
||
|
|
preprocessor.
|
||
|
|
|
||
|
|
<p>GCC versions 3.2 and later only support traditional mode semantics in
|
||
|
|
the preprocessor, and not in the compiler front ends. This chapter
|
||
|
|
outlines the traditional preprocessor semantics we implemented.
|
||
|
|
|
||
|
|
<p>The implementation does not correspond precisely to the behavior of
|
||
|
|
earlier versions of GCC, nor to any true traditional preprocessor.
|
||
|
|
After all, inconsistencies among traditional implementations were a
|
||
|
|
major motivation for C standardization. However, we intend that it
|
||
|
|
should be compatible with true traditional preprocessors in all ways
|
||
|
|
that actually matter.
|
||
|
|
|
||
|
|
<ul class="menu">
|
||
|
|
<li><a accesskey="1" href="Traditional-lexical-analysis.html#Traditional-lexical-analysis">Traditional lexical analysis</a>
|
||
|
|
<li><a accesskey="2" href="Traditional-macros.html#Traditional-macros">Traditional macros</a>
|
||
|
|
<li><a accesskey="3" href="Traditional-miscellany.html#Traditional-miscellany">Traditional miscellany</a>
|
||
|
|
<li><a accesskey="4" href="Traditional-warnings.html#Traditional-warnings">Traditional warnings</a>
|
||
|
|
</ul>
|
||
|
|
|
||
|
|
</body></html>
|
||
|
|
|