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📁 自己收集的linux入门到学懂高级编程书集包括linux程序设计第三版
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<html lang="en"><head><title>Using the GNU Compiler Collection (GCC)</title><meta http-equiv="Content-Type" content="text/html"><meta name="description" content="Using the GNU Compiler Collection (GCC)"><meta name="generator" content="makeinfo 4.6"><!--Copyright &copy; 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.   <p>Permission is granted to copy, distribute and/or modify this documentunder the terms of the GNU Free Documentation License, Version 1.2 orany later version published by the Free Software Foundation; with theInvariant Sections being "GNU General Public License" and "FundingFree Software", the Front-Cover texts being (a) (see below), and withthe Back-Cover Texts being (b) (see below).  A copy of the license isincluded in the section entitled "GNU Free Documentation License".   <p>(a) The FSF's Front-Cover Text is:   <p>A GNU Manual   <p>(b) The FSF's Back-Cover Text is:   <p>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 }--></style></head><body><div class="node"><p>Node:&nbsp;<a name="C++%20Extensions">C++ Extensions</a>,Next:&nbsp;<a rel="next" accesskey="n" href="Objective-C.html#Objective-C">Objective-C</a>,Previous:&nbsp;<a rel="previous" accesskey="p" href="C-Extensions.html#C%20Extensions">C Extensions</a>,Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a><hr><br></div><h2 class="chapter">Extensions to the C++ Language</h2><p>The GNU compiler provides these extensions to the C++ language (and youcan also use most of the C language extensions in your C++ programs).  If youwant to write code that checks whether these features are available, you cantest for the GNU compiler the same way as for C programs: check for apredefined macro <code>__GNUC__</code>.  You can also use <code>__GNUG__</code> totest specifically for GNU C++ (see <a href="../cpp/Common-Predefined-Macros.html#Common%20Predefined%20Macros">Predefined Macros</a>).<ul class="menu"><li><a accesskey="1" href="Min-and-Max.html#Min%20and%20Max">Min and Max</a>: 		C++ Minimum and maximum operators. <li><a accesskey="2" href="Volatiles.html#Volatiles">Volatiles</a>: 		What constitutes an access to a volatile object. <li><a accesskey="3" href="Restricted-Pointers.html#Restricted%20Pointers">Restricted Pointers</a>:  C99 restricted pointers and references. <li><a accesskey="4" href="Vague-Linkage.html#Vague%20Linkage">Vague Linkage</a>:        Where G++ puts inlines, vtables and such. <li><a accesskey="5" href="C---Interface.html#C++%20Interface">C++ Interface</a>:        You can use a single C++ header file for both                        declarations and definitions. <li><a accesskey="6" href="Template-Instantiation.html#Template%20Instantiation">Template Instantiation</a>:  Methods for ensuring that exactly one copy of                        each needed template instantiation is emitted. <li><a accesskey="7" href="Bound-member-functions.html#Bound%20member%20functions">Bound member functions</a>:  You can extract a function pointer to the                        method denoted by a <code>-&gt;*</code> or <code>.*</code> expression. <li><a accesskey="8" href="C---Attributes.html#C++%20Attributes">C++ Attributes</a>:       Variable, function, and type attributes for C++ only. <li><a accesskey="9" href="Strong-Using.html#Strong%20Using">Strong Using</a>:       Strong using-directives for namespace composition. <li><a href="Offsetof.html#Offsetof">Offsetof</a>:             Special syntax for implementing <code>offsetof</code>. <li><a href="Java-Exceptions.html#Java%20Exceptions">Java Exceptions</a>:      Tweaking exception handling to work with Java. <li><a href="Deprecated-Features.html#Deprecated%20Features">Deprecated Features</a>:  Things will disappear from g++. <li><a href="Backwards-Compatibility.html#Backwards%20Compatibility">Backwards Compatibility</a>:  Compatibilities with earlier definitions of C++. </ul>   </body></html>
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