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/INSTALL

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  1Copyright 1994, 1995, 1996, 1999, 2000, 2001, 2002 Free Software
  2Foundation, Inc.
  3
  4   This file is free documentation; the Free Software Foundation gives
  5unlimited permission to copy, distribute and modify it.
  6
  7Basic Installation
  8==================
  9
 10   These are generic installation instructions.
 11
 12   The `configure' shell script attempts to guess correct values for
 13various system-dependent variables used during compilation.  It uses
 14those values to create a `Makefile' in each directory of the package.
 15It may also create one or more `.h' files containing system-dependent
 16definitions.  Finally, it creates a shell script `config.status' that
 17you can run in the future to recreate the current configuration, and a
 18file `config.log' containing compiler output (useful mainly for
 19debugging `configure').
 20
 21   It can also use an optional file (typically called `config.cache'
 22and enabled with `--cache-file=config.cache' or simply `-C') that saves
 23the results of its tests to speed up reconfiguring.  (Caching is
 24disabled by default to prevent problems with accidental use of stale
 25cache files.)
 26
 27   If you need to do unusual things to compile the package, please try
 28to figure out how `configure' could check whether to do them, and mail
 29diffs or instructions to the address given in the `README' so they can
 30be considered for the next release.  If you are using the cache, and at
 31some point `config.cache' contains results you don't want to keep, you
 32may remove or edit it.
 33
 34   The file `configure.ac' (or `configure.in') is used to create
 35`configure' by a program called `autoconf'.  You only need
 36`configure.ac' if you want to change it or regenerate `configure' using
 37a newer version of `autoconf'.
 38
 39The simplest way to compile this package is:
 40
 41  0. `cd' to the directory containing the package's source code and type
 42      ./bootstrap to make the build scripts.  Your system must have
 43      autoconf, automake, and libtool installed to properly build
 44      the build scripts.
 45
 46  1. Type `./configure' to configure the package for your system.  If
 47     you're using `csh' on an old version of System V, you might need
 48     to type `sh ./configure' instead to prevent `csh' from trying to
 49     execute `configure' itself.
 50
 51     Running `configure' takes awhile.  While running, it prints some
 52     messages telling which features it is checking for.
 53
 54  2. Type `make' to compile the package.
 55
 56  3. Optionally, type `make check' to run any self-tests that come with
 57     the package.
 58
 59  4. Type `make install' to install the programs and any data files and
 60     documentation.
 61
 62  5. You can remove the program binaries and object files from the
 63     source code directory by typing `make clean'.  To also remove the
 64     files that `configure' created (so you can compile the package for
 65     a different kind of computer), type `make distclean'.  There is
 66     also a `make maintainer-clean' target, but that is intended mainly
 67     for the package's developers.  If you use it, you may have to get
 68     all sorts of other programs in order to regenerate files that came
 69     with the distribution.
 70
 71Compilers and Options
 72=====================
 73
 74   Some systems require unusual options for compilation or linking that
 75the `configure' script does not know about.  Run `./configure --help'
 76for details on some of the pertinent environment variables.
 77
 78   You can give `configure' initial values for variables by setting
 79them in the environment.  You can do that on the command line like this:
 80
 81     ./configure CC=c89 CFLAGS=-O2 LIBS=-lposix
 82
 83   *Note Defining Variables::, for more details.
 84
 85Compiling For Multiple Architectures
 86====================================
 87
 88   You can compile the package for more than one kind of computer at the
 89same time, by placing the object files for each architecture in their
 90own directory.  To do this, you must use a version of `make' that
 91supports the `VPATH' variable, such as GNU `make'.  `cd' to the
 92directory where you want the object files and executables to go and run
 93the `configure' script.  `configure' automatically checks for the
 94source code in the directory that `configure' is in and in `..'.
 95
 96   If you have to use a `make' that does not support the `VPATH'
 97variable, you have to compile the package for one architecture at a
 98time in the source code directory.  After you have installed the
 99package for one architecture, use `make distclean' before reconfiguring
100for another architecture.
101
102Installation Names
103==================
104
105   By default, `make install' will install the package's files in
106`/usr/local/bin', `/usr/local/man', etc.  You can specify an
107installation prefix other than `/usr/local' by giving `configure' the
108option `--prefix=PATH'.
109
110   You can specify separate installation prefixes for
111architecture-specific files and architecture-independent files.  If you
112give `configure' the option `--exec-prefix=PATH', the package will use
113PATH as the prefix for installing programs and libraries.
114Documentation and other data files will still use the regular prefix.
115
116   In addition, if you use an unusual directory layout you can give
117options like `--bindir=PATH' to specify different values for particular
118kinds of files.  Run `configure --help' for a list of the directories
119you can set and what kinds of files go in them.
120
121   If the package supports it, you can cause programs to be installed
122with an extra prefix or suffix on their names by giving `configure' the
123option `--program-prefix=PREFIX' or `--program-suffix=SUFFIX'.
124
125Optional Features
126=================
127
128   Some packages pay attention to `--enable-FEATURE' options to
129`configure', where FEATURE indicates an optional part of the package.
130They may also pay attention to `--with-PACKAGE' options, where PACKAGE
131is something like `gnu-as' or `x' (for the X Window System).  The
132`README' should mention any `--enable-' and `--with-' options that the
133package recognizes.
134
135   For packages that use the X Window System, `configure' can usually
136find the X include and library files automatically, but if it doesn't,
137you can use the `configure' options `--x-includes=DIR' and
138`--x-libraries=DIR' to specify their locations.
139
140Specifying the System Type
141==========================
142
143   There may be some features `configure' cannot figure out
144automatically, but needs to determine by the type of machine the package
145will run on.  Usually, assuming the package is built to be run on the
146_same_ architectures, `configure' can figure that out, but if it prints
147a message saying it cannot guess the machine type, give it the
148`--build=TYPE' option.  TYPE can either be a short name for the system
149type, such as `sun4', or a canonical name which has the form:
150
151     CPU-COMPANY-SYSTEM
152
153where SYSTEM can have one of these forms:
154
155     OS KERNEL-OS
156
157   See the file `config.sub' for the possible values of each field.  If
158`config.sub' isn't included in this package, then this package doesn't
159need to know the machine type.
160
161   If you are _building_ compiler tools for cross-compiling, you should
162use the `--target=TYPE' option to select the type of system they will
163produce code for.
164
165   If you want to _use_ a cross compiler, that generates code for a
166platform different from the build platform, you should specify the
167"host" platform (i.e., that on which the generated programs will
168eventually be run) with `--host=TYPE'.
169
170Sharing Defaults
171================
172
173   If you want to set default values for `configure' scripts to share,
174you can create a site shell script called `config.site' that gives
175default values for variables like `CC', `cache_file', and `prefix'.
176`configure' looks for `PREFIX/share/config.site' if it exists, then
177`PREFIX/etc/config.site' if it exists.  Or, you can set the
178`CONFIG_SITE' environment variable to the location of the site script.
179A warning: not all `configure' scripts look for a site script.
180
181Defining Variables
182==================
183
184   Variables not defined in a site shell script can be set in the
185environment passed to `configure'.  However, some packages may run
186configure again during the build, and the customized values of these
187variables may be lost.  In order to avoid this problem, you should set
188them in the `configure' command line, using `VAR=value'.  For example:
189
190     ./configure CC=/usr/local2/bin/gcc
191
192will cause the specified gcc to be used as the C compiler (unless it is
193overridden in the site shell script).
194
195`configure' Invocation
196======================
197
198   `configure' recognizes the following options to control how it
199operates.
200
201`--help'
202`-h'
203     Print a summary of the options to `configure', and exit.
204
205`--version'
206`-V'
207     Print the version of Autoconf used to generate the `configure'
208     script, and exit.
209
210`--cache-file=FILE'
211     Enable the cache: use and save the results of the tests in FILE,
212     traditionally `config.cache'.  FILE defaults to `/dev/null' to
213     disable caching.
214
215`--config-cache'
216`-C'
217     Alias for `--cache-file=config.cache'.
218
219`--quiet'
220`--silent'
221`-q'
222     Do not print messages saying which checks are being made.  To
223     suppress all normal output, redirect it to `/dev/null' (any error
224     messages will still be shown).
225
226`--srcdir=DIR'
227     Look for the package's source code in directory DIR.  Usually
228     `configure' can determine that directory automatically.
229
230`configure' also accepts some other, not widely useful, options.  Run
231`configure --help' for more details.
232