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    1 Installation Instructions
    2 *************************
    3 
    4 Copyright (C) 1994, 1995, 1996, 1999, 2000, 2001, 2002, 2004, 2005 Free
    5 Software Foundation, Inc.
    6 
    7 This file is free documentation; the Free Software Foundation gives
    8 unlimited permission to copy, distribute and modify it.
    9 
   10 Basic Installation
   11 ==================
   12 
   13 These are generic installation instructions.
   14 
   15    The `configure' shell script attempts to guess correct values for
   16 various system-dependent variables used during compilation.  It uses
   17 those values to create a `Makefile' in each directory of the package.
   18 It may also create one or more `.h' files containing system-dependent
   19 definitions.  Finally, it creates a shell script `config.status' that
   20 you can run in the future to recreate the current configuration, and a
   21 file `config.log' containing compiler output (useful mainly for
   22 debugging `configure').
   23 
   24    It can also use an optional file (typically called `config.cache'
   25 and enabled with `--cache-file=config.cache' or simply `-C') that saves
   26 the results of its tests to speed up reconfiguring.  (Caching is
   27 disabled by default to prevent problems with accidental use of stale
   28 cache files.)
   29 
   30    If you need to do unusual things to compile the package, please try
   31 to figure out how `configure' could check whether to do them, and mail
   32 diffs or instructions to the address given in the `README' so they can
   33 be considered for the next release.  If you are using the cache, and at
   34 some point `config.cache' contains results you don't want to keep, you
   35 may remove or edit it.
   36 
   37    The file `configure.ac' (or `configure.in') is used to create
   38 `configure' by a program called `autoconf'.  You only need
   39 `configure.ac' if you want to change it or regenerate `configure' using
   40 a newer version of `autoconf'.
   41 
   42 The simplest way to compile this package is:
   43 
   44   1. `cd' to the directory containing the package's source code and type
   45      `./configure' to configure the package for your system.  If you're
   46      using `csh' on an old version of System V, you might need to type
   47      `sh ./configure' instead to prevent `csh' from trying to execute
   48      `configure' itself.
   49 
   50      Running `configure' takes awhile.  While running, it prints some
   51      messages telling which features it is checking for.
   52 
   53   2. Type `make' to compile the package.
   54 
   55   3. Optionally, type `make check' to run any self-tests that come with
   56      the package.
   57 
   58   4. Type `make install' to install the programs and any data files and
   59      documentation.
   60 
   61   5. You can remove the program binaries and object files from the
   62      source code directory by typing `make clean'.  To also remove the
   63      files that `configure' created (so you can compile the package for
   64      a different kind of computer), type `make distclean'.  There is
   65      also a `make maintainer-clean' target, but that is intended mainly
   66      for the package's developers.  If you use it, you may have to get
   67      all sorts of other programs in order to regenerate files that came
   68      with the distribution.
   69 
   70 Compilers and Options
   71 =====================
   72 
   73 Some systems require unusual options for compilation or linking that the
   74 `configure' script does not know about.  Run `./configure --help' for
   75 details on some of the pertinent environment variables.
   76 
   77    You can give `configure' initial values for configuration parameters
   78 by setting variables in the command line or in the environment.  Here
   79 is an example:
   80 
   81      ./configure CC=c89 CFLAGS=-O2 LIBS=-lposix
   82 
   83    *Note Defining Variables::, for more details.
   84 
   85 Compiling For Multiple Architectures
   86 ====================================
   87 
   88 You can compile the package for more than one kind of computer at the
   89 same time, by placing the object files for each architecture in their
   90 own directory.  To do this, you must use a version of `make' that
   91 supports the `VPATH' variable, such as GNU `make'.  `cd' to the
   92 directory where you want the object files and executables to go and run
   93 the `configure' script.  `configure' automatically checks for the
   94 source 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'
   97 variable, you have to compile the package for one architecture at a
   98 time in the source code directory.  After you have installed the
   99 package for one architecture, use `make distclean' before reconfiguring
  100 for another architecture.
  101 
  102 Installation Names
  103 ==================
  104 
  105 By default, `make install' installs the package's commands under
  106 `/usr/local/bin', include files under `/usr/local/include', etc.  You
  107 can specify an installation prefix other than `/usr/local' by giving
  108 `configure' the option `--prefix=PREFIX'.
  109 
  110    You can specify separate installation prefixes for
  111 architecture-specific files and architecture-independent files.  If you
  112 pass the option `--exec-prefix=PREFIX' to `configure', the package uses
  113 PREFIX as the prefix for installing programs and libraries.
  114 Documentation and other data files still use the regular prefix.
  115 
  116    In addition, if you use an unusual directory layout you can give
  117 options like `--bindir=DIR' to specify different values for particular
  118 kinds of files.  Run `configure --help' for a list of the directories
  119 you can set and what kinds of files go in them.
  120 
  121    If the package supports it, you can cause programs to be installed
  122 with an extra prefix or suffix on their names by giving `configure' the
  123 option `--program-prefix=PREFIX' or `--program-suffix=SUFFIX'.
  124 
  125 Optional Features
  126 =================
  127 
  128 Some packages pay attention to `--enable-FEATURE' options to
  129 `configure', where FEATURE indicates an optional part of the package.
  130 They may also pay attention to `--with-PACKAGE' options, where PACKAGE
  131 is something like `gnu-as' or `x' (for the X Window System).  The
  132 `README' should mention any `--enable-' and `--with-' options that the
  133 package recognizes.
  134 
  135    For packages that use the X Window System, `configure' can usually
  136 find the X include and library files automatically, but if it doesn't,
  137 you can use the `configure' options `--x-includes=DIR' and
  138 `--x-libraries=DIR' to specify their locations.
  139 
  140 Specifying the System Type
  141 ==========================
  142 
  143 There may be some features `configure' cannot figure out automatically,
  144 but needs to determine by the type of machine the package will run on.
  145 Usually, assuming the package is built to be run on the _same_
  146 architectures, `configure' can figure that out, but if it prints a
  147 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
  149 type, such as `sun4', or a canonical name which has the form:
  150 
  151      CPU-COMPANY-SYSTEM
  152 
  153 where 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
  159 need to know the machine type.
  160 
  161    If you are _building_ compiler tools for cross-compiling, you should
  162 use the option `--target=TYPE' to select the type of system they will
  163 produce code for.
  164 
  165    If you want to _use_ a cross compiler, that generates code for a
  166 platform different from the build platform, you should specify the
  167 "host" platform (i.e., that on which the generated programs will
  168 eventually be run) with `--host=TYPE'.
  169 
  170 Sharing Defaults
  171 ================
  172 
  173 If you want to set default values for `configure' scripts to share, you
  174 can create a site shell script called `config.site' that gives default
  175 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.
  179 A warning: not all `configure' scripts look for a site script.
  180 
  181 Defining Variables
  182 ==================
  183 
  184 Variables not defined in a site shell script can be set in the
  185 environment passed to `configure'.  However, some packages may run
  186 configure again during the build, and the customized values of these
  187 variables may be lost.  In order to avoid this problem, you should set
  188 them in the `configure' command line, using `VAR=value'.  For example:
  189 
  190      ./configure CC=/usr/local2/bin/gcc
  191 
  192 causes the specified `gcc' to be used as the C compiler (unless it is
  193 overridden in the site shell script).  Here is a another example:
  194 
  195      /bin/bash ./configure CONFIG_SHELL=/bin/bash
  196 
  197 Here the `CONFIG_SHELL=/bin/bash' operand causes subsequent
  198 configuration-related scripts to be executed by `/bin/bash'.
  199 
  200 `configure' Invocation
  201 ======================
  202 
  203 `configure' recognizes the following options to control how it operates.
  204 
  205 `--help'
  206 `-h'
  207      Print a summary of the options to `configure', and exit.
  208 
  209 `--version'
  210 `-V'
  211      Print the version of Autoconf used to generate the `configure'
  212      script, and exit.
  213 
  214 `--cache-file=FILE'
  215      Enable the cache: use and save the results of the tests in FILE,
  216      traditionally `config.cache'.  FILE defaults to `/dev/null' to
  217      disable caching.
  218 
  219 `--config-cache'
  220 `-C'
  221      Alias for `--cache-file=config.cache'.
  222 
  223 `--quiet'
  224 `--silent'
  225 `-q'
  226      Do not print messages saying which checks are being made.  To
  227      suppress all normal output, redirect it to `/dev/null' (any error
  228      messages will still be shown).
  229 
  230 `--srcdir=DIR'
  231      Look for the package's source code in directory DIR.  Usually
  232      `configure' can determine that directory automatically.
  233 
  234 `configure' also accepts some other, not widely useful, options.  Run
  235 `configure --help' for more details.
  236