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| 22 | <title>Preprocessing (GNU C Language Manual)</title>
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| 33 | <link href="Preproc-Overview.html" rel="next" title="Preproc Overview">
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| 57 | <body lang="en">
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| 58 | <span id="Preprocessing"></span><div class="header">
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| 59 | <p>
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| 60 | Next: <a href="Integers-in-Depth.html" accesskey="n" rel="next">Integers in Depth</a>, Previous: <a href="Scope.html" accesskey="p" rel="prev">Scope</a>, Up: <a href="index.html" accesskey="u" rel="up">Top</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Symbol-Index.html" title="Index" rel="index">Index</a>]</p>
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| 61 | </div>
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| 62 | <hr>
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| 63 | <span id="Preprocessing-1"></span><h2 class="chapter">26 Preprocessing</h2>
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| 64 | <span id="index-preprocessing"></span>
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| 65 | <p>As the first stage of compiling a C source module, GCC transforms the
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| 66 | text with text substitutions and file inclusions. This is called
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| 67 | <em>preprocessing</em>.
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| 68 | </p>
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| 69 | <table class="menu" border="0" cellspacing="0">
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| 70 | <tr><td align="left" valign="top">• <a href="Preproc-Overview.html" accesskey="1">Preproc Overview</a></td><td> </td><td align="left" valign="top">
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| 71 | </td></tr>
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| 72 | <tr><td align="left" valign="top">• <a href="Directives.html" accesskey="2">Directives</a></td><td> </td><td align="left" valign="top">
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| 73 | </td></tr>
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| 74 | <tr><td align="left" valign="top">• <a href="Preprocessing-Tokens.html" accesskey="3">Preprocessing Tokens</a></td><td> </td><td align="left" valign="top">
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| 75 | </td></tr>
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| 76 | <tr><td align="left" valign="top">• <a href="Header-Files.html" accesskey="4">Header Files</a></td><td> </td><td align="left" valign="top">
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| 77 | </td></tr>
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| 78 | <tr><td align="left" valign="top">• <a href="Macros.html" accesskey="5">Macros</a></td><td> </td><td align="left" valign="top">
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| 79 | </td></tr>
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| 80 | <tr><td align="left" valign="top">• <a href="Conditionals.html" accesskey="6">Conditionals</a></td><td> </td><td align="left" valign="top">
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| 81 | </td></tr>
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| 82 | <tr><td align="left" valign="top">• <a href="Diagnostics.html" accesskey="7">Diagnostics</a></td><td> </td><td align="left" valign="top">
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| 83 | </td></tr>
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| 84 | <tr><td align="left" valign="top">• <a href="Line-Control.html" accesskey="8">Line Control</a></td><td> </td><td align="left" valign="top">
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| 85 | </td></tr>
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| 86 | <tr><td align="left" valign="top">• <a href="Null-Directive.html" accesskey="9">Null Directive</a></td><td> </td><td align="left" valign="top">
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| 87 | </td></tr>
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