📄 autobook_250.html
字号:
<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: Executable Filename Extensions</TITLE><META NAME="description" CONTENT="Autoconf, Automake, and Libtool: Executable Filename Extensions"><META NAME="keywords" CONTENT="Autoconf, Automake, and Libtool: Executable Filename Extensions"><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; } if (checkVersion()) { homeon = new Image(); homeon.src = "homeon.png"; homeoff = new Image(); homeoff.src = "home.png"; tocon = new Image(); tocon.src = "tocon.png"; tocoff = new Image(); tocoff.src = "toc.png"; indexon = new Image(); indexon.src = "indexon.png"; indexoff = new Image(); indexoff.src = "index.png"; helpon = new Image(); helpon.src = "helpon.png"; helpoff = new Image(); helpoff.src = "help.png"; backon = new Image(); backon.src = "backon.png"; backoff = new Image(); backoff.src = "back.png"; forwardon = new Image(); forwardon.src = "forwardon.png"; forwardoff = new Image(); forwardoff.src = "forward.png"; prevon = new Image(); prevon.src = "prevon.png"; prevoff = new Image(); prevoff.src = "prev.png"; nexton = new Image(); nexton.src = "nexton.png"; nextoff = new Image(); nextoff.src = "next.png"; upon = new Image(); upon.src = "upon.png"; upoff = new Image(); upoff.src = "up.png"; } function img_act(imgName) { if (checkVersion()) { imgOn = eval(imgName + "on.src"); document [imgName].src = imgOn; } } function img_inact(imgName) { if (checkVersion()) { imgOff = eval(imgName + "off.src"); document [imgName].src = imgOff; } }// --></SCRIPT></HEAD><BODY LANG="EN" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#6688AA" VLINK="#336688" ALINK="#808080"><A NAME="SEC250"></A><TABLE BORDER=0 CELLPADDING=0 CELLSPACING=10><TR VALIGN="TOP"><TD ALIGN="MIDDLE" WIDTH=50 BGCOLOR="#e6e6e6"><TABLE CELLPADDING=1 CELLSPACING=1 BORDER=0><TR VALIGN="TOP" ALIGN="LEFT"><TD VALIGN="MIDDLE" ALIGN="LEFT"><A HREF="autobook_249.html#SEC249" onMouseover="img_act('prev')" onMouseout="img_inact('prev')"><IMG SRC="prev.png" BORDER="0" ALT="Back: Separators and Drive Letters" ALIGN="MIDDLE" NAME="prev"></A></TD></TR><TR VALIGN="TOP" ALIGN="LEFT"><TD VALIGN="MIDDLE" ALIGN="LEFT"><A HREF="autobook_251.html#SEC251" onMouseover="img_act('next')" onMouseout="img_inact('next')"><IMG SRC="next.png" BORDER="0" ALT="Forward: DLLs with Libtool" ALIGN="MIDDLE" NAME="next"></A></TD></TR><TR VALIGN="TOP" ALIGN="LEFT"><TD VALIGN="MIDDLE" ALIGN="LEFT"> <TR VALIGN="TOP" ALIGN="LEFT"><TD VALIGN="MIDDLE" ALIGN="LEFT"><A HREF="autobook_251.html#SEC251" onMouseover="img_act('back')" onMouseout="img_inact('back')"><IMG SRC="back.png" BORDER="0" ALT="FastBack: DLLs with Libtool" ALIGN="MIDDLE" NAME="back"></A></TD></TR><TR VALIGN="TOP" ALIGN="LEFT"><TD VALIGN="MIDDLE" ALIGN="LEFT"><A HREF="autobook_245.html#SEC245" onMouseover="img_act('up')" onMouseout="img_inact('up')"><IMG SRC="up.png" BORDER="0" ALT="Up: Writing A Cygwin Friendly Package" ALIGN="MIDDLE" NAME="up"></A></TD></TR><TR VALIGN="TOP" ALIGN="LEFT"><TD VALIGN="MIDDLE" ALIGN="LEFT"><A HREF="autobook_251.html#SEC251" onMouseover="img_act('forward')" onMouseout="img_inact('forward')"><IMG SRC="forward.png" BORDER="0" ALT="FastForward: DLLs with Libtool" ALIGN="MIDDLE" NAME="forward"></A></TD></TR><TR VALIGN="TOP" ALIGN="LEFT"><TD VALIGN="MIDDLE" ALIGN="LEFT"><A HREF="autobook.html#SEC_Top" onMouseover="img_act('home')" onMouseout="img_inact('home')"><IMG SRC="home.png" BORDER="0" ALT="Top: Autoconf, Automake, and Libtool" ALIGN="MIDDLE" NAME="home"></A></TD></TR><TR VALIGN="TOP" ALIGN="LEFT"><TD VALIGN="MIDDLE" ALIGN="LEFT"><A HREF="autobook_toc.html#SEC_Contents" onMouseover="img_act('toc')" onMouseout="img_inact('toc')"><IMG SRC="toc.png" BORDER="0" ALT="Contents: Table of Contents" ALIGN="MIDDLE" NAME="toc"></A></TD></TR><TR VALIGN="TOP" ALIGN="LEFT"><TD VALIGN="MIDDLE" ALIGN="LEFT"><A HREF="autobook_285.html#SEC285" onMouseover="img_act('index')" onMouseout="img_inact('index')"><IMG SRC="index.png" BORDER="0" ALT="Index: Index" ALIGN="MIDDLE" NAME="index"></A></TD></TR><TR VALIGN="TOP" ALIGN="LEFT"><TD VALIGN="MIDDLE" ALIGN="LEFT"><A HREF="autobook_abt.html#SEC_About" onMouseover="img_act('help')" onMouseout="img_inact('help')"><IMG SRC="help.png" BORDER="0" ALT="About: About this document" ALIGN="MIDDLE" NAME="help"></A></TD></TR></TABLE></TD><TD ALIGN="LEFT"><H3> 25.3.3 Executable Filename Extensions </H3><!--docid::SEC250::--><P>As I already noted in <A HREF="autobook_257.html#SEC257">25.5 Package Installation</A>, the fact that Windowsrequires that all program files be named with the extension <SAMP>`.exe'</SAMP>,is the cause of several inconsistencies in package behaviour betweenWindows and Unix.</P><P>For example, where Libtool is involved, if a packagebuilds an executable which is linked against an as yet uninstalledlibrary, <CODE>libtool</CODE> puts the real executable in the <TT>`.libs'</TT>(or <TT>`_libs'</TT>) subdirectory, and writes a shell script to theoriginal destination of the executable<A NAME="DOCF64" HREF="autobook_fot.html#FOOT64">(64)</A>, which ensures the runtime library search pathsare adjusted to find the correct (uninstalled) libraries that itdepends upon. On Windows, only a PE-COFF executable is allowed to bearthe <CODE>.exe</CODE> extension, so the wrapper script has to be nameddifferently to the executable it is substituted for (i.e the script isonly executed correctly by the operating system if it does <STRONG>not</STRONG>have an <TT>`.exe'</TT> extension). The result of this confusion is that the<TT>`Makefile'</TT> can't see some of the executables it builds with Libtoolbecause the generated rules assume an <TT>`.exe'</TT> extension will be inevidence. This problem will be addressed in some future revision ofAutomake and Libtool. In the mean time, it is sometimes necessary tomove the executables from the <TT>`.libs'</TT> directory to their installdestination by hand. The continual rebuilding of wrapped executables ateach invocation of <CODE>make</CODE> is another symptom of using wrapperscripts with a different name to the executable which they represent.</P><P>It is very important to correctly add the <SAMP>`.exe'</SAMP> extension toprogram file names in your <TT>`Makefile.am'</TT>, otherwise many of thegenerated rules will not work correctly while they await a file withoutthe <SAMP>`.exe'</SAMP> extension. Fortunately, Automake will do this for youwhere ever it is able to tell that a file is a program -- everythinglisted in <SAMP>`bin_PROGRAMS'</SAMP> for example. Occasionally you will findcases where there is no way for Automake to be sure of this, in whichcase you must be sure to add the <SAMP>`$(EXEEXT)'</SAMP> suffix. Bystructuring your <TT>`Makefile.am'</TT> carefully, this can be avoided inthe majority of cases:</P><P><TABLE width=100%><tr><td> </td><td class=example bgcolor=#6688aa><br><pre>TESTS = $(check_SCRIPTS) script-test bin1-test$(EXEEXT)</pre></td></tr></table></P><P>could be rewritten as:</P><P><TABLE width=100%><tr><td> </td><td class=example bgcolor=#6688aa><br><pre>check_PROGRAMS = bin1-testTESTS = $(check_SCRIPTS) script-test $(check_PROGRAMS)</pre></td></tr></table></P><P>The value of <SAMP>`EXEEXT'</SAMP> is always set correctly with respect to thehost machine if you use Libtool in your project. If you don't useLibtool, you must manually call the Autoconf macro, <SAMP>`AC_EXEEXT'</SAMP> inyour <TT>`configure.in'</TT> to make sure that it is initialiasedcorrectly. If you don't call this macro (either directly or implicitlywith <SAMP>`AC_PROG_LIBTOOL'</SAMP>), your project will almost certainly notbuild correctly on Cygwin.</P><P><A NAME="DLLs with Libtool"></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
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -