1*36ac495dSmrg<?xml version="1.0" encoding="UTF-8" standalone="no"?> 2*36ac495dSmrg<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title></title><meta name="generator" content="DocBook XSL Stylesheets Vsnapshot" /><meta name="keywords" content="ISO C++, library" /><meta name="keywords" content="ISO C++, runtime, library" /><link rel="home" href="../index.html" title="The GNU C++ Library" /><link rel="up" href="extensions.html" title="Part III. Extensions" /><link rel="prev" href="extensions.html" title="Part III. Extensions" /><link rel="next" href="ext_compile_checks.html" title="Chapter 16. Compile Time Checks" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="extensions.html">Prev</a> </td><th width="60%" align="center">Part III. 3*36ac495dSmrg Extensions 4*36ac495dSmrg 5*36ac495dSmrg</th><td width="20%" align="right"> <a accesskey="n" href="ext_compile_checks.html">Next</a></td></tr></table><hr /></div><div class="preface"><div class="titlepage"><div><div><h1 class="title"><a id="manual.ext.preface"></a></h1></div></div></div><p> 6*36ac495dSmrg Here we will make an attempt at describing the non-Standard 7*36ac495dSmrg extensions to the library. Some of these are from older versions of 8*36ac495dSmrg standard library components, namely SGI's STL, and some of these are 9*36ac495dSmrg GNU's. 10*36ac495dSmrg</p><p><span class="emphasis"><em>Before</em></span> you leap in and use any of these 11*36ac495dSmrgextensions, be aware of two things: 12*36ac495dSmrg</p><div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem"><p> 13*36ac495dSmrg Non-Standard means exactly that. 14*36ac495dSmrg </p><p> 15*36ac495dSmrg The behavior, and the very 16*36ac495dSmrg existence, of these extensions may change with little or no 17*36ac495dSmrg warning. (Ideally, the really good ones will appear in the next 18*36ac495dSmrg revision of C++.) Also, other platforms, other compilers, other 19*36ac495dSmrg versions of g++ or libstdc++ may not recognize these names, or 20*36ac495dSmrg treat them differently, or... 21*36ac495dSmrg </p></li><li class="listitem"><p> 22*36ac495dSmrg You should know how to access these headers properly. 23*36ac495dSmrg </p></li></ol></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="extensions.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="extensions.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="ext_compile_checks.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Part III. 24*36ac495dSmrg Extensions 25*36ac495dSmrg 26*36ac495dSmrg </td><td width="20%" align="center"><a accesskey="h" href="../index.html">Home</a></td><td width="40%" align="right" valign="top"> Chapter 16. Compile Time Checks</td></tr></table></div></body></html>