<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
|
<html>
|
<!-- Copyright (C) 1988-2016 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; with the
|
Invariant Sections being "Funding Free Software", the Front-Cover
|
Texts being (a) (see below), and with the Back-Cover Texts being (b)
|
(see below). A copy of the license is included in the section entitled
|
"GNU Free Documentation License".
|
|
(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. -->
|
<!-- Created by GNU Texinfo 5.2, http://www.gnu.org/software/texinfo/ -->
|
<head>
|
<title>Using the GNU Compiler Collection (GCC): Type Attributes</title>
|
|
<meta name="description" content="Using the GNU Compiler Collection (GCC): Type Attributes">
|
<meta name="keywords" content="Using the GNU Compiler Collection (GCC): Type Attributes">
|
<meta name="resource-type" content="document">
|
<meta name="distribution" content="global">
|
<meta name="Generator" content="makeinfo">
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
|
<link href="index.html#Top" rel="start" title="Top">
|
<link href="Option-Index.html#Option-Index" rel="index" title="Option Index">
|
<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
|
<link href="C-Extensions.html#C-Extensions" rel="up" title="C Extensions">
|
<link href="Common-Type-Attributes.html#Common-Type-Attributes" rel="next" title="Common Type Attributes">
|
<link href="Xstormy16-Variable-Attributes.html#Xstormy16-Variable-Attributes" rel="prev" title="Xstormy16 Variable Attributes">
|
<style type="text/css">
|
<!--
|
a.summary-letter {text-decoration: none}
|
blockquote.smallquotation {font-size: smaller}
|
div.display {margin-left: 3.2em}
|
div.example {margin-left: 3.2em}
|
div.indentedblock {margin-left: 3.2em}
|
div.lisp {margin-left: 3.2em}
|
div.smalldisplay {margin-left: 3.2em}
|
div.smallexample {margin-left: 3.2em}
|
div.smallindentedblock {margin-left: 3.2em; font-size: smaller}
|
div.smalllisp {margin-left: 3.2em}
|
kbd {font-style:oblique}
|
pre.display {font-family: inherit}
|
pre.format {font-family: inherit}
|
pre.menu-comment {font-family: serif}
|
pre.menu-preformatted {font-family: serif}
|
pre.smalldisplay {font-family: inherit; font-size: smaller}
|
pre.smallexample {font-size: smaller}
|
pre.smallformat {font-family: inherit; font-size: smaller}
|
pre.smalllisp {font-size: smaller}
|
span.nocodebreak {white-space:nowrap}
|
span.nolinebreak {white-space:nowrap}
|
span.roman {font-family:serif; font-weight:normal}
|
span.sansserif {font-family:sans-serif; font-weight:normal}
|
ul.no-bullet {list-style: none}
|
-->
|
</style>
|
|
|
</head>
|
|
<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
|
<a name="Type-Attributes"></a>
|
<div class="header">
|
<p>
|
Next: <a href="Label-Attributes.html#Label-Attributes" accesskey="n" rel="next">Label Attributes</a>, Previous: <a href="Variable-Attributes.html#Variable-Attributes" accesskey="p" rel="prev">Variable Attributes</a>, Up: <a href="C-Extensions.html#C-Extensions" accesskey="u" rel="up">C Extensions</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>
|
</div>
|
<hr>
|
<a name="Specifying-Attributes-of-Types"></a>
|
<h3 class="section">6.33 Specifying Attributes of Types</h3>
|
<a name="index-attribute-of-types"></a>
|
<a name="index-type-attributes"></a>
|
|
<p>The keyword <code>__attribute__</code> allows you to specify special
|
attributes of types. Some type attributes apply only to <code>struct</code>
|
and <code>union</code> types, while others can apply to any type defined
|
via a <code>typedef</code> declaration. Other attributes are defined for
|
functions (see <a href="Function-Attributes.html#Function-Attributes">Function Attributes</a>), labels (see <a href="Label-Attributes.html#Label-Attributes">Label Attributes</a>), enumerators (see <a href="Enumerator-Attributes.html#Enumerator-Attributes">Enumerator Attributes</a>), and for
|
variables (see <a href="Variable-Attributes.html#Variable-Attributes">Variable Attributes</a>).
|
</p>
|
<p>The <code>__attribute__</code> keyword is followed by an attribute specification
|
inside double parentheses.
|
</p>
|
<p>You may specify type attributes in an enum, struct or union type
|
declaration or definition by placing them immediately after the
|
<code>struct</code>, <code>union</code> or <code>enum</code> keyword. A less preferred
|
syntax is to place them just past the closing curly brace of the
|
definition.
|
</p>
|
<p>You can also include type attributes in a <code>typedef</code> declaration.
|
See <a href="Attribute-Syntax.html#Attribute-Syntax">Attribute Syntax</a>, for details of the exact syntax for using
|
attributes.
|
</p>
|
<table class="menu" border="0" cellspacing="0">
|
<tr><td align="left" valign="top">• <a href="Common-Type-Attributes.html#Common-Type-Attributes" accesskey="1">Common Type Attributes</a>:</td><td> </td><td align="left" valign="top">
|
</td></tr>
|
<tr><td align="left" valign="top">• <a href="ARM-Type-Attributes.html#ARM-Type-Attributes" accesskey="2">ARM Type Attributes</a>:</td><td> </td><td align="left" valign="top">
|
</td></tr>
|
<tr><td align="left" valign="top">• <a href="MeP-Type-Attributes.html#MeP-Type-Attributes" accesskey="3">MeP Type Attributes</a>:</td><td> </td><td align="left" valign="top">
|
</td></tr>
|
<tr><td align="left" valign="top">• <a href="PowerPC-Type-Attributes.html#PowerPC-Type-Attributes" accesskey="4">PowerPC Type Attributes</a>:</td><td> </td><td align="left" valign="top">
|
</td></tr>
|
<tr><td align="left" valign="top">• <a href="SPU-Type-Attributes.html#SPU-Type-Attributes" accesskey="5">SPU Type Attributes</a>:</td><td> </td><td align="left" valign="top">
|
</td></tr>
|
<tr><td align="left" valign="top">• <a href="x86-Type-Attributes.html#x86-Type-Attributes" accesskey="6">x86 Type Attributes</a>:</td><td> </td><td align="left" valign="top">
|
</td></tr>
|
</table>
|
|
|
|
|
</body>
|
</html>
|
