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<HTML><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><!-- Created on September, 12 2004 by texi2html 1.64 --><!-- Written by: Lionel Cons <Lionel.Cons@cern.ch> (original author) Karl Berry <karl@freefriends.org> Olaf Bachmann <obachman@mathematik.uni-kl.de> and many others.Maintained by: Olaf Bachmann <obachman@mathematik.uni-kl.de>Send bugs and suggestions to <texi2html@mathematik.uni-kl.de> --><HEAD><TITLE>Autoconf, Automake, and Libtool: Libtool Development</TITLE><META NAME="description" CONTENT="Autoconf, Automake, and Libtool: Libtool Development"><META NAME="keywords" CONTENT="Autoconf, Automake, and Libtool: Libtool Development"><META NAME="resource-type" CONTENT="document"><META NAME="distribution" CONTENT="global"><META NAME="Generator" CONTENT="texi2html 1.64"><script language="Javascript"><!-- // Check the browser version. function checkVersion() { if (navigator.appVersion.charAt(0)>=3) return true; if (navigator.appVersion.charAt(0)>=4) return true; else return false; 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This means that each program which uses a static libraryincludes some or all of the library in the program binary on disk.</P><P>Shared libraries, on the other hand, are a separate file. A programwhich uses a shared library does not include a copy of the library; itonly includes the name of the library. Many programs can use a singleshared library.</P><P>Using a shared library reduces disk space requirements. Since thesystem can generally share a single executable instance of the sharedlibrary among many programs, it also reduces swap space requirements atrun time. Another advantage is that it is possible to fix a bug byupdating the single shared library file on disk, without requiring allthe programs which use the library to be rebuilt.</P><P>The first Unix shared library implementation was in System V release 3from <FONT SIZE="-1">AT&T</FONT>. The idea was rapidly adopted by other Unixvendors, appearing in SunOS, HP-UX, AIX, and Digital Unixamong others. Unfortunately, each implementation differed in thecreation and use of shared libraries and in the specific features whichwere supported.</P><P>Naturally, packages distributed as source code which included librarieswanted to be able to build their own shared libraries. Severaldifferent implementations were written in the Autoconf/Automakeframework.</P><P>In 1996, Gordon Matzigkeit began work on a package known as Libtool.Libtool is a collection of shell scripts which handle the differencesbetween shared library generation and use on different systems. It isclosely tied to Automake, although it is possible to use itindependently.</P><P>Over time, Libtool has been enhanced to support more Unix variants andto provide an interface for standardizing shared library features.</P><P><A NAME="Microsoft Windows Development"></A></TR></TABLE><BR> <FONT SIZE="-1">This document was generatedby <I>Gary V. Vaughan</I> on <I>September, 12 2004</I>using <A HREF="http://www.mathematik.uni-kl.de/~obachman/Texi2html"><I>texi2html</I></A></BODY></HTML>⌨️ 快捷键说明
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