1<html lang="en"> 2<head> 3<title>Pragmas - Using the GNU Compiler Collection (GCC)</title> 4<meta http-equiv="Content-Type" content="text/html"> 5<meta name="description" content="Using the GNU Compiler Collection (GCC)"> 6<meta name="generator" content="makeinfo 4.13"> 7<link title="Top" rel="start" href="index.html#Top"> 8<link rel="up" href="C-Extensions.html#C-Extensions" title="C Extensions"> 9<link rel="prev" href="Target-Format-Checks.html#Target-Format-Checks" title="Target Format Checks"> 10<link rel="next" href="Unnamed-Fields.html#Unnamed-Fields" title="Unnamed Fields"> 11<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage"> 12<!-- 13Copyright (C) 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 141998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 152010 Free Software Foundation, Inc. 16 17Permission is granted to copy, distribute and/or modify this document 18under the terms of the GNU Free Documentation License, Version 1.3 or 19any later version published by the Free Software Foundation; with the 20Invariant Sections being ``Funding Free Software'', the Front-Cover 21Texts being (a) (see below), and with the Back-Cover Texts being (b) 22(see below). A copy of the license is included in the section entitled 23``GNU Free Documentation License''. 24 25(a) The FSF's Front-Cover Text is: 26 27 A GNU Manual 28 29(b) The FSF's Back-Cover Text is: 30 31 You have freedom to copy and modify this GNU Manual, like GNU 32 software. Copies published by the Free Software Foundation raise 33 funds for GNU development.--> 34<meta http-equiv="Content-Style-Type" content="text/css"> 35<style type="text/css"><!-- 36 pre.display { font-family:inherit } 37 pre.format { font-family:inherit } 38 pre.smalldisplay { font-family:inherit; font-size:smaller } 39 pre.smallformat { font-family:inherit; font-size:smaller } 40 pre.smallexample { font-size:smaller } 41 pre.smalllisp { font-size:smaller } 42 span.sc { font-variant:small-caps } 43 span.roman { font-family:serif; font-weight:normal; } 44 span.sansserif { font-family:sans-serif; font-weight:normal; } 45--></style> 46<link rel="stylesheet" type="text/css" href="../cs.css"> 47</head> 48<body> 49<div class="node"> 50<a name="Pragmas"></a> 51<p> 52Next: <a rel="next" accesskey="n" href="Unnamed-Fields.html#Unnamed-Fields">Unnamed Fields</a>, 53Previous: <a rel="previous" accesskey="p" href="Target-Format-Checks.html#Target-Format-Checks">Target Format Checks</a>, 54Up: <a rel="up" accesskey="u" href="C-Extensions.html#C-Extensions">C Extensions</a> 55<hr> 56</div> 57 58<h3 class="section">6.56 Pragmas Accepted by GCC</h3> 59 60<p><a name="index-pragmas-3211"></a><a name="index-g_t_0040code_007b_0023pragma_007d-3212"></a> 61GCC supports several types of pragmas, primarily in order to compile 62code originally written for other compilers. Note that in general 63we do not recommend the use of pragmas; See <a href="Function-Attributes.html#Function-Attributes">Function Attributes</a>, 64for further explanation. 65 66<ul class="menu"> 67<li><a accesskey="1" href="ARM-Pragmas.html#ARM-Pragmas">ARM Pragmas</a> 68<li><a accesskey="2" href="M32C-Pragmas.html#M32C-Pragmas">M32C Pragmas</a> 69<li><a accesskey="3" href="MeP-Pragmas.html#MeP-Pragmas">MeP Pragmas</a> 70<li><a accesskey="4" href="RS_002f6000-and-PowerPC-Pragmas.html#RS_002f6000-and-PowerPC-Pragmas">RS/6000 and PowerPC Pragmas</a> 71<li><a accesskey="5" href="Darwin-Pragmas.html#Darwin-Pragmas">Darwin Pragmas</a> 72<li><a accesskey="6" href="Solaris-Pragmas.html#Solaris-Pragmas">Solaris Pragmas</a> 73<li><a accesskey="7" href="Symbol_002dRenaming-Pragmas.html#Symbol_002dRenaming-Pragmas">Symbol-Renaming Pragmas</a> 74<li><a accesskey="8" href="Structure_002dPacking-Pragmas.html#Structure_002dPacking-Pragmas">Structure-Packing Pragmas</a> 75<li><a accesskey="9" href="Weak-Pragmas.html#Weak-Pragmas">Weak Pragmas</a> 76<li><a href="Diagnostic-Pragmas.html#Diagnostic-Pragmas">Diagnostic Pragmas</a> 77<li><a href="Visibility-Pragmas.html#Visibility-Pragmas">Visibility Pragmas</a> 78<li><a href="Push_002fPop-Macro-Pragmas.html#Push_002fPop-Macro-Pragmas">Push/Pop Macro Pragmas</a> 79<li><a href="Function-Specific-Option-Pragmas.html#Function-Specific-Option-Pragmas">Function Specific Option Pragmas</a> 80</ul> 81 82 </body></html> 83 84