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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: Configuration Names</TITLE><META NAME="description" CONTENT="Autoconf, Automake, and Libtool: Configuration Names"><META NAME="keywords" CONTENT="Autoconf, Automake, and Libtool: Configuration Names"><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 is a name for the system in astandardized format.<P>Some example configuration names are <SAMP>`sparc-sun-solaris2.7'</SAMP>,<SAMP>`i586-pc-linux-gnu'</SAMP>, or <SAMP>`i386-pc-cygwin'</SAMP>.</P><P>All configuration names used to have three parts, and in somedocumentation they are still called <EM>configuration triplets</EM>. Athree part configuration name is<VAR>cpu</VAR>-<VAR>manufacturer</VAR>-<VAR>operating_system</VAR>. Currentlyconfiguration names are permitted to have four parts on systems whichdistinguish the kernel and the operating system, such as GNU/Linux. Inthese cases, the configuration name is<VAR>cpu</VAR>-<VAR>manufacturer</VAR>-<VAR>kernel</VAR>-<VAR>operating_system</VAR>.</P><P>When using a configuration name in an option to a tool such as<CODE>configure</CODE>, it is normally not necessary to specify an entirename. In particular, the middle field (<VAR>manufacturer</VAR>, describedbelow) is often omitted, leading to strings such as <SAMP>`i386-linux'</SAMP> or<SAMP>`sparc-sunos'</SAMP>. The shell script <TT>`config.sub'</TT> is used totranslate these shortened strings into the canonical form.</P><P>On most Unix variants, the shell script <TT>`config.guess'</TT> will printthe correct configuration name for the system it is run on. It doesthis by running the standard <SAMP>`uname'</SAMP> program, and by examiningother characteristics of the system. On some systems,<TT>`config.guess'</TT> requires a working C compiler or an assembler.</P><P>Because <TT>`config.guess'</TT> can normally determine the configurationname for a machine, it is only necessary for a user or developer tospecify a configuration name in unusual cases, such as when building across-compiler.</P><P>Here is a description of each field in a configuration name:</P><P><DL COMPACT><DT><VAR>cpu</VAR><DD>The type of processor used on the system. This is typically somethinglike <SAMP>`i386'</SAMP> or <SAMP>`sparc'</SAMP>. More specific variants are used aswell, such as <SAMP>`mipsel'</SAMP> to indicate a little endian MIPS processor.<P><DT><VAR>manufacturer</VAR><DD>A somewhat freeform field which indicates the manufacturer of thesystem. This is often simply <SAMP>`unknown'</SAMP>. Other common strings are<SAMP>`pc'</SAMP> for an IBM PC compatible system, or the name of a workstationvendor, such as <SAMP>`sun'</SAMP>.<P><DT><VAR>operating_system</VAR><DD>The name of the operating system which is run on the system. This willbe something like <SAMP>`solaris2.5'</SAMP> or <SAMP>`winnt4.0'</SAMP>. There is noparticular restriction on the version number, and strings like<SAMP>`aix4.1.4.0'</SAMP> are seen.<P>Configuration names may be used to describe all sorts of systems,including embedded systems which do not run any operating system. Inthis case, the field is normally used to indicate the object fileformat, such as <SAMP>`elf'</SAMP> or <SAMP>`coff'</SAMP>.</P><P><DT><VAR>kernel</VAR><DD>This is used mainly for GNU/Linux systems. A typical GNU/Linuxconfiguration name is <SAMP>`i586-pc-linux-gnulibc1'</SAMP>. In this case thekernel, <SAMP>`linux'</SAMP>, is separated from the operating system,<SAMP>`gnulibc1'</SAMP>.</DL><P><TT>`configure'</TT> allows fine control over the format of binary files. Itis not necessary to build a package for a given kind of machine on thatmachine natively--instead, a cross-compiler can be used. Moreover, ifthe package you are trying to build is itself capable of operating in across configuration, then the build system need not be the same kind ofmachine used to host the cross-configured package once the package isbuilt! Consider some examples:</P><P><DL COMPACT><DT>Compiling a simple package for a GNU/Linux system.<DD><VAR>host</VAR> = <VAR>build</VAR> = <VAR>target</VAR> = <SAMP>`i586-pc-linux-gnu'</SAMP><P><DT>Cross-compiling a package on a GNU/Linux system that is intended to<DD>run on an IBM AIX machine:<VAR>build</VAR> = <SAMP>`i586-pc-linux-gnu'</SAMP>, <VAR>host</VAR> = <VAR>target</VAR> =<SAMP>`rs6000-ibm-aix3.2'</SAMP><P><DT>Building a Solaris-hosted MIPS-ECOFF cross-compiler on a GNU/Linux<DD>system.<VAR>build</VAR> = <SAMP>`i586-pc-linux-gnu'</SAMP>, <VAR>host</VAR> =<SAMP>`sparc-sun-solaris2.4'</SAMP>, <VAR>target</VAR> = <SAMP>`mips-idt-ecoff'</SAMP></DL><P><A NAME="Introducing Makefiles"></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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