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    1 Basic Installation
    2 ==================
    4    These are generic installation instructions.
    6    The `configure' shell script attempts to guess correct values for
    7 various system-dependent variables used during compilation.  It uses
    8 those values to create a `Makefile' in each directory of the package.
    9 It may also create one or more `.h' files containing system-dependent
   10 definitions.  Finally, it creates a shell script `config.status' that
   11 you can run in the future to recreate the current configuration, a file
   12 `config.cache' that saves the results of its tests to speed up
   13 reconfiguring, and a file `config.log' containing compiler output
   14 (useful mainly for debugging `configure').
   16    If you need to do unusual things to compile the package, please try
   17 to figure out how `configure' could check whether to do them, and mail
   18 diffs or instructions to the address given in the `README' so they can
   19 be considered for the next release.  If at some point `config.cache'
   20 contains results you don't want to keep, you may remove or edit it.
   22    The file `configure.in' is used to create `configure' by a program
   23 called `autoconf'.  You only need `configure.in' if you want to change
   24 it or regenerate `configure' using a newer version of `autoconf'.
   26 The simplest way to compile this package is:
   28   1. `cd' to the directory containing the package's source code and type
   29      `./configure' to configure the package for your system.  If you're
   30      using `csh' on an old version of System V, you might need to type
   31      `sh ./configure' instead to prevent `csh' from trying to execute
   32      `configure' itself.
   34      Running `configure' takes a while.  While running, it prints some
   35      messages telling which features it is checking for.
   37   2. Type `make' to compile the package.
   39   3. Optionally, type `make check' to run any self-tests that come with
   40      the package.
   42   4. Type `make install' to install the programs and any data files and
   43      documentation.
   45   5. You can remove the program binaries and object files from the
   46      source code directory by typing `make clean'.  To also remove the
   47      files that `configure' created (so you can compile the package for
   48      a different kind of computer), type `make distclean'.  There is
   49      also a `make maintainer-clean' target, but that is intended mainly
   50      for the package's developers.  If you use it, you may have to get
   51      all sorts of other programs in order to regenerate files that came
   52      with the distribution.
   54 Compilers and Options
   55 =====================
   57    Some systems require unusual options for compilation or linking that
   58 the `configure' script does not know about.  You can give `configure'
   59 initial values for variables by setting them in the environment.  Using
   60 a Bourne-compatible shell, you can do that on the command line like
   61 this:
   62      CC=c89 CFLAGS=-O2 LIBS=-lposix ./configure
   64 Or on systems that have the `env' program, you can do it like this:
   65      env CPPFLAGS=-I/usr/local/include LDFLAGS=-s ./configure
   67 Compiling For Multiple Architectures
   68 ====================================
   70    You can compile the package for more than one kind of computer at the
   71 same time, by placing the object files for each architecture in their
   72 own directory.  To do this, you must use a version of `make' that
   73 supports the `VPATH' variable, such as GNU `make'.  `cd' to the
   74 directory where you want the object files and executables to go and run
   75 the `configure' script.  `configure' automatically checks for the
   76 source code in the directory that `configure' is in and in `..'.
   78    If you have to use a `make' that does not supports the `VPATH'
   79 variable, you have to compile the package for one architecture at a time
   80 in the source code directory.  After you have installed the package for
   81 one architecture, use `make distclean' before reconfiguring for another
   82 architecture.
   84 Installation Names
   85 ==================
   87    By default, `make install' will install the package's files in
   88 `/usr/local/bin', `/usr/local/man', etc.  You can specify an
   89 installation prefix other than `/usr/local' by giving `configure' the
   90 option `--prefix=PATH'.
   92    You can specify separate installation prefixes for
   93 architecture-specific files and architecture-independent files.  If you
   94 give `configure' the option `--exec-prefix=PATH', the package will use
   95 PATH as the prefix for installing programs and libraries.
   96 Documentation and other data files will still use the regular prefix.
   98    If the package supports it, you can cause programs to be installed
   99 with an extra prefix or suffix on their names by giving `configure' the
  100 option `--program-prefix=PREFIX' or `--program-suffix=SUFFIX'.
  102 Optional Features
  103 =================
  105    Some packages pay attention to `--enable-FEATURE' options to
  106 `configure', where FEATURE indicates an optional part of the package.
  107 They may also pay attention to `--with-PACKAGE' options, where PACKAGE
  108 is something like `gnu-as' or `x' (for the X Window System).  The
  109 `README' should mention any `--enable-' and `--with-' options that the
  110 package recognizes.
  112    For packages that use the X Window System, `configure' can usually
  113 find the X include and library files automatically, but if it doesn't,
  114 you can use the `configure' options `--x-includes=DIR' and
  115 `--x-libraries=DIR' to specify their locations.
  117 Specifying the System Type
  118 ==========================
  120    There may be some features `configure' can not figure out
  121 automatically, but needs to determine by the type of host the package
  122 will run on.  Usually `configure' can figure that out, but if it prints
  123 a message saying it can not guess the host type, give it the
  124 `--host=TYPE' option.  TYPE can either be a short name for the system
  125 type, such as `sun4', or a canonical name with three fields:
  128 See the file `config.sub' for the possible values of each field.  If
  129 `config.sub' isn't included in this package, then this package doesn't
  130 need to know the host type.
  132    If you are building compiler tools for cross-compiling, you can also
  133 use the `--target=TYPE' option to select the type of system they will
  134 produce code for and the `--build=TYPE' option to select the type of
  135 system on which you are compiling the package.
  137 Sharing Defaults
  138 ================
  140    If you want to set default values for `configure' scripts to share,
  141 you can create a site shell script called `config.site' that gives
  142 default values for variables like `CC', `cache_file', and `prefix'.
  143 `configure' looks for `PREFIX/share/config.site' if it exists, then
  144 `PREFIX/etc/config.site' if it exists.  Or, you can set the
  145 `CONFIG_SITE' environment variable to the location of the site script.
  146 A warning: not all `configure' scripts look for a site script.
  148 Operation Controls
  149 ==================
  151    `configure' recognizes the following options to control how it
  152 operates.
  154 `--cache-file=FILE'
  155      Use and save the results of the tests in FILE instead of
  156      `./config.cache'.  Set FILE to `/dev/null' to disable caching, for
  157      debugging `configure'.
  159 `--help'
  160      Print a summary of the options to `configure', and exit.
  162 `--quiet'
  163 `--silent'
  164 `-q'
  165      Do not print messages saying which checks are being made.
  167 `--srcdir=DIR'
  168      Look for the package's source code in directory DIR.  Usually
  169      `configure' can determine that directory automatically.
  171 `--version'
  172      Print the version of Autoconf used to generate the `configure'
  173      script, and exit.
  175 `configure' also accepts some other, not widely useful, options.