LPRng Installation
          Patrick Powell <papowell@lprng.com>
        Updated Sat May  7 07:21:54 PDT 2005

  SUPER EXPRESS INSTALLATION FOR TERMINALLY IMPATIENT SYSADMINS

READ THE NEXT COUPLE OF PARAGRAPHS:

To put files and executables in the most common 'STANDARD locations' 
and/or replace your current LPR and/or CUPS printing environment:

   tar zxvf LPRng-<version>.tgz
   cd  LPRng-<version>.tgz
   sh STANDARD_configuration
   make clean; make all; make STARTSERVER=YES install;

   (Note: STARTSERVER=YES will cause the following script
   to run:
       checkpc -f   # fixes up printcaps
       lpd
   The exact details vary from system to system)

The "STANDARD_configuration" script will run configure and set up
the most common configuration for UNIX/LINUX systems:

  - /etc/printcap, /etc/lpd/lpd.conf, /etc/lpd/lpd.perms configuration files.
    (Note: the new suggested file system hierarchy puts configuration files
    in a subdirectory such as /etc/lpd.  However, if /etc/printcap is put
    in /etc/lpd/printcap,  this breaks a huge number of legacy systems.)
  - executables in /usr/bin, /usr/sbin
  - you do not need any include files from /usr/local/include
    or libraries from /usr/local/lib
  - no Kerberos support

   Here is the contents of the STANDARD_configuration file:
    #!/bin/sh
	set -x
	if [ -d /usr/share/man ] ; then
		mandir="--mandir=/usr/share/man"
	fi
	sh ./configure --prefix=/usr --sysconfdir=/etc $mandir --disable-shared \
	 --disable-kerberos --enable-ssl --enable-force_localhost \

USING CONFIGURE DEFAULTS DIRECTORIES
 
  By default, configure will put files in /usr/local/... directories.
  If you want to install LPRng in parallel with your existing printing system,
  you can have configure put the executables in the /usr/local/... locations:
     configure;
     make clean all
     (as root):
       make install
       checkpc -f

   The currently running LPD server must be shut down and the LPRng lpd
   server started.

CAVEATS and WARNINGS:

    The LPRng software requires an ANSI C compiler and a make utility that is
    compatible with Gnu Make (verson 3.73 or later) or FreeBSD 4.2 or later.
    LPRng is compiled and tested using GCC and Gnu Make.  It uses libtool
    to create a shared library on systems where this is supported.  Due to
	security concerns with dynamic or shared libraries,  LPRng by default is
    compiled as statically linked executables.  Before using dynamic or
    shared libraries,  please check on the security implications of doing so
    for SETUID ROOT or executables running as ROOT.

INCLUDE FILES AND LIBRARIES 

If you are using GETOPT or Kerberos you may need to extend the search
paths for include files and libraries.  See the STANDARD_configuration
and KERBEROS_configuration files for examples.

Solaris Users:

   You can get precompiled versions of the GCC compiler and GNU Make
   from:
      www.sunfreeware.com

   The LPRng code has NOT been tested with the Sun Microsystems compilers,
   and NOT been tested with 64 bit support enabled.

   During compilation and installation, the PATH environment variable
   MUST have /usr/local/bin FIRST followed by /usr/ccs/bin:

     PATH=/usr/local/bin:/usr/ccs/bin:$PATH

   If you have ANY problems with compilation,  and you are NOT using a
   'clean' GCC installation,  please install GCC from a package (see
   http://www.sunfreeware.com) or remove gcc and reinstall it.
   Make sure that the include files are correct for your version
   of Solaris.  In fact, I recommend that you do the compilation on a
   'clean' machine that has nothing but a 'virgin' Solaris Install +
   utilities BEFORE reporting problems.

     You have been warned.

HPUX Users:

    See the following site for precompiled GCC and other tools:
         http://hpux.cae.wisc.edu/

   I STRONGLY recommend installing GCC and using GCC.  Make sure
   that your include files are the correct ones for your particular
   OS.

   If you use the native or HP provided C compiler,  you will need to
   add some additional flags to allow ANSI C compatibility.  The
   -Aa and -Ae are candidates,  but you will have to check your
   particular compiler for details.

   Ryan Novosielski <novosirj@umdnj.edu> suggests that
   for HP-UX 11.0 and 11.11 you may need to use
   --with-linker=/usr/bin/ld

     You have been warned.

EXTREMELY IMPORTANT WARNING FOR THE SANITY OF SYSADMINS

    It is extremely dangerous to use NFS mounted file systems for spool
    directories.  The LPRng system depends on file locking for process
    coordination and synchronization.  Given the historical evidence
    of problems with file locks and NFS,  not to mention the terrible
    performance impact,  it is strongly recommended that you use a
    local file system for your spool directories.

     You have been warned.

SYSTEM STARTUP SCRIPTS

The software install procedures will attempt to create and install
a startup script for the following systems:

FreeBSD: /usr/local/etc/rc/lpd.sh, /etc/rc.conf
   The installation procedures will stop the LPD print spooler,
   update the lpd.sh and /etc/rc.conf file,  and restart the LPD print spooler.
  
RedHat Linux: RedHat /etc/init.d/lprng
   The chkconfig utility will be used to set up LPRng
   to run at level 345.

Solaris: /etc/inetd.conf, /etc/init.d/lprng.sh
    Removes the 'printer' entry from /etc/inetd.conf file
    Also puts a startup script in /etc/init.d and
    creates link to script in /etc/rc2.d.

LINUX, System V, Solaris:

    The print services startup file is in /etc/rc.d/init.d (or /etc/init.d)
    and symbolic links are made to it from the rc<level>.d directories.
    The links usually have the form NNNname, e.g.- 322lpr, where the NNN
    is the order that the script is to be executed relative to the other
    scripts and the 'name' is the name of the script in the  /etc/rc.d/init.d
    directory.

    At startup time the script is invoked with the 'start' option and
    at shutdown time with the 'stop' option.  The following script
    shows an example of how this is used.

    #!/bin/sh
    case "$1" in
      start)
            # Start daemons.
            /usr/bin/echo "Starting lpd: \c"; /usr/local/bin/lpd;
        /usr/bin/echo "";
            ;;
      stop)
            # Stop daemons.
            /usr/bin/printf "Shutting down lpd: "
            pkill lpd
            /usr/bin/echo "done"
            ;;
      *)
            echo "Usage: lpd {start|stop}"
            ;;
    esac


Other distributions:
    You will have to hand install
    startup scripts.  See the sample startup scripts on your
    system and modify them appropriately.  Usually all
    that is done is to change the path to the lpd program
    or lpsched program to use the LPRng lpd server.

CONFIGURATION

  The configure (autoconf) utility is used to specify the
  location of files and run time options for the LPRng software.

  configure (autoconf) defaults for files and directories:
     ${prefix}  - default is /usr/local
     ${exec_prefix}  - default is ${prefix}
     ${bindir}  is usually ${exec_refix}/bin, (/usr/local/bin)
     ${sbindir} is usually ${exec_prefix}/sbin (/usr/local/sbin)
     ${libdir} is usually ${exec_prefix}/lib (/usr/local/lib)
     ${libexecdir} is usually ${exec_prefix}/libexec (/usr/local/libexec)
     ${sysconfdir} is usually ${prefix}/etc (/usr/local/etc)
     ${mandir} is usually ${prefix}/man     (/usr/local/man)

  CONFIGURATION FILES:

     All of the LPRng configuration files but printcap files go in
     ${sysconfdir}/lpd/, usually /etc/lpd/.  The printcap file,
     for historical and backwards compatibility reasons,
     is is in ${sysconfdir}/printcap, i.e. - /etc/printcap.
     We install a sample lpd.conf, lpd.perms, and printcap files
     and do not overwrite existing lpd.conf, lpd.perms and printcap files.
     
     Default 'configure' locations:
         lpd.conf:   /usr/local/etc/lpd/lpd.conf  (/usr/local/etc/lpd/lpd.conf.sample)
         lpd.perms:  /usr/local/etc/lpd/lpd.perms (/usr/local/etc/lpd/lpd.perms.sample)
         printcap:   /usr/local/etc/printcap (/usr/local/etc/printcap.sample)

     Standard UNIX Configuration:
         lpd.conf:   /etc/lpd/lpd.conf  (/etc/lpd/lpd.conf.sample)
         lpd.perms:  /etc/lpd/lpd.perms (/etc/lpd/lpd.perms.sample)
         printcap:   /etc/printcap (/etc/printcap.sample)

  EXECUTABLES AND SHARED LIBRARIES:
         (* indicates SETUID root permissions)
     ${bindir}/ lpr*, lprm*, lpq*, lpstat*
     ${sbindir}/lpc*, checkpc, lpd
     ${libdir}/liblpr.so, liblib.a
     ${libexecdir}/filters/ lpf, banner, etc
     ${sysconfdir}/ lpd.conf, lpd.perms, printcap
     ${mandir}/ man pages

     Default 'configure' locations:
		/usr/local/bin/{lpr, lprm, ... }
		/usr/local/sbin/{lpd, checkpc, lpc ... }
		/usr/local/libexec/filters/{lpf, banner, etc }

     Standard UNIX Configuration:
		/usr/local/bin/{lpr, lprm, ... }
		/usr/local/sbin/{lpd, checkpc, lpc ... }
		/usr/local/libexec/filters/{lpf, banner, etc }

  STANDARD OR HISTORICAL COMPATIBILITY:
     See the STANDARD_configuration file.  Basically, this runs
  configure with:
     ./configure --prefix=/usr --sysconfdir=/etc

     i.e. - /etc/printcap, /etc/lpd/lpd.conf, /etc/lpd/lpd.perms
            /usr/bin/{lpr, lprm, ... }
            /usr/sbin/{lpd, checkpc, lpc ... }
            /usr/lib/{liblpr.so, liblpr.a, ... }
            /usr/libexec/filters/{lpf, banner, etc }

CONFIGURATION OPTIONS

  In addition to the --prefix, etc., mentioned above,  there are several
    more you can use:

     COMPILATION:
  Environment variables (also can be on command line):
  CC=          C compiler command
  CFLAGS=      C compiler flags
  LDFLAGS=     linker flags, e.g. -L<lib dir> if you have libraries in a
              nonstandard directory <lib dir>
  CPPFLAGS=    C/C++ preprocessor flags, e.g. -I<include dir> if you have
              headers in a nonstandard directory <include dir>
  CPP=         C preprocessor


	Fine tuning of the installation directories:
	  --bindir=DIR           user executables [EPREFIX/bin]
	  --sbindir=DIR          system admin executables [EPREFIX/sbin]
	  --libexecdir=DIR       program executables [EPREFIX/libexec]
	  --datadir=DIR          read-only architecture-independent data [PREFIX/share]
	  --sysconfdir=DIR       read-only single-machine data [PREFIX/etc]
	  --sharedstatedir=DIR   modifiable architecture-independent data [PREFIX/com]
	  --localstatedir=DIR    modifiable single-machine data [PREFIX/var]
	  --libdir=DIR           object code libraries [EPREFIX/lib]
	  --includedir=DIR       C header files [PREFIX/include]
	  --oldincludedir=DIR    C header files for non-gcc [/usr/include]
	  --infodir=DIR          info documentation [PREFIX/info]
	  --mandir=DIR           man documentation [PREFIX/man]
	  --with-config_subdir=CONFIG_SUBDIR configuration subdirectory (default 'lpd')
	  --with-lpddir=DIR                 lpd executable directory (default \${sbindir})
	  --with-lpd_conf_path=PATH         path of lpd.conf (default: \${sysconfdir}/${CONFIG_SUBDIR}/lpd.conf)
	  --with-lpd_perms_path=PATH        path of lpd.perms (default: \${sysconfdir}/${CONFIG_SUBDIR}/lpd/lpd.perms)
	  --with-printcap_path=PATH         path of printcap (default \${sysconfdir}/printcap)
	  --with-lpd_printcap_path=PATH     path of lpd_printcap (default \${sysconfdir}/${CONFIG_SUBDIR}/lpd_printcap)
	  --with-initpath=PATH              path of lpd startup file (default /usr/local/etc/rc.d/lprng.sh)
										   use 'no' to disable installation and lpd startup
	  --with-lockfile=PATH              lockfile PATH, default /var/run/lpd
	  --with-ld_libary_path=PATH        LD_LIBRARY_PATH value, default /lib:/usr/lib:/usr/local/lib
	  --with-filter_path=PATH           filter PATH value, default /bin:/usr/bin:/usr/local/bin
	  --with-localedir=PATH   specify locale information directory

  OPERATIONAL 

	  --disable-setuid                  do not install client executables setuid root
	  --enable-priv_ports               require connections from privileged ports
	  --disable-force_localhost         disable force_localhost default
	  --disable-require_configfiles     client programs require lpd.conf, printcap
	  --enable-kerberos                 enable kerberos support
	  --enable-mit_kerberos4            enable MIT Kerberos 4 support
	  --disable-kerberos_checks         disable kerberos library location and checking for support
	  --disable-werror                  disable -Werror compile flag
	  --disable-strip                   disable stripping binaries by default
	  --enable-shared=PKGS  build shared libraries default=no
	  --enable-static=PKGS  build static libraries default=yes
	  --enable-fast-install=PKGS  optimize for fast installation default=yes
	  --disable-libtool-lock  avoid locking (might break parallel builds)
	  --disable-rpath         do not hardcode runtime library paths
	  --enable-nls           use Native Language Support
	  --enable-tcpwrappers             use tcp wrappers (-lwrap)
	  --disable-ssl                 disable ssl support

	  --with-unix_socket_path=DIR       unix socket path (default /var/run/lprng)
	  --with-userid=NAME                run LPRng software as this userid, default daemon
	  --with-groupid=NAME               run LPRng software as this groupid, default daemon
	  --with-done_jobs=N                retain last N job status, default 1
	  --with-done_jobs_max_age=N        retain job status N seconds, default 0 - no expiry
	  --with-chooser_routine=NAME       load balance queue chooser routine name in user object file
	  --with-order_routine=NAME         queue order routine name in user object file
	  --with-user_objs=NAME             user specified object file
	  --with-user_include=NAME          include file with function prototypes for user object file
	  --with-filterdir=DIR              filter directory (default \${libexecdir}/filters)
	  --with-gnu-ld           assume the C compiler uses GNU ld default=no
	  --with-pic              try to use only PIC/non-PIC objects default=use both
	  --with-libiconv-prefix=DIR  search for libiconv in DIR/include and DIR/lib
	  --without-libiconv-prefix     don't search for libiconv in includedir and libdir
	  --with-libintl-prefix=DIR  search for libintl in DIR/include and DIR/lib
	  --without-libintl-prefix     don't search for libintl in includedir and libdir
	  --with-openssl=DIR          root location for OpenSSL
	  --with-openssl-inc        OpenSSL include files
	  --with-openssl-lib        OpenSSL library files
	  --with-ssl_ca_file=FILE     ssl Certificate Authority CERT file (default \${sysconfdir}/${CONFIG_SUBDIR}/ssl.ca/ca.crt)
	  --with-ssl_ca_key=KEY     ssl Certificate Authority private key file (default \${sysconfdir}/${CONFIG_SUBDIR}/ssl.ca/ca.key)
	  --with-ssl_certs_dir=DIR     ssl Certificate Authority certs working directory (default \${sysconfdir}/${CONFIG_SUBDIR}/ssl.certs/)
	  --with-ssl_crl_file=PATH     ssl Certificate Revocation List File (default \${sysconfdir}/${CONFIG_SUBDIR}/ssl.crl/ssl.crl)
	  --with-ssl_server_cert=FILE     ssl server certificate file (default \${sysconfdir}/${CONFIG_SUBDIR}/ssl.server/server.crt)
	  --with-ssl_server_password_file=FILE     ssl server private key in password file (default \${sysconfdir}/${CONFIG_SUBDIR}/ssl.server/server.pwd)

STARTING LPD SERVER AND CHECKING CONFIGURATION

    Use the following command to check to see that
    the LPD server is running on the localhost:

       #> lpc -s localhost lpd

    If it has not been started,  then you can start it by hand:

       #> /usr/sbin/lpd

INSTALLATION PROBLEMS

If the installation step did not install the executables
in the correct location or there are other problems,
use the following procedures to fix up the install:

    # kill off the old server
    On BSD:
    kill `ps -aux |grep lpd | awk '{print $2}'`
    On System V:
    kill `ps -e |grep lpd | awk '{print $1}'`

You should remove or rename the original lpd binaries if they
have are still present:

    mv /usr/lib/lpd /usr/lib/lpd.old
    ln -s /usr/local/bin/lpd /usr/lib/lpd
    # you might want to track down the old lpr, lpq, lprm binaries
    find /usr -type file -name lp\*  -print >/tmp/candidates
    find /sbin -type file -name lp\* -print >>/tmp/candidates
    # Examine the /tmp/candidates file, and remove or rename the
    # non-LPRng versions of the programs
    # remove or rename the candidate files
    /usr/local/sbin/lpd;    # start up LPD
      OR
    /usr/sbin/lpd;    # start up LPD
      OR
    /????/lpd         # start up LPD
    lpq;    # test it with LPQ

If you are running on Solaris, see the Solaris section in the LPRng
Reference Manual for further instructions on integration with the
LP subsystem.

PRINTCAP FILES:

Read the comments in the /etc/printcap.sample for details on
how to set up a simple set of printcap entries.  You may also
want to read the Printing Cookbook and the LPRng Reference Manual
documentation.

SECURITY WARNINGS:

  The default configuration for LPRng allows connections from
  any port while a strict RFC1179 implementation would require
  connections only from a port in the range 721-731.  Relaxing
  this restriction allows non-setuid root clients (lpr, lpq, etc)
  to connect to the LPRng server.

  The following is the default LPRng system installation:

    1. All client programs are installed Setuid Root.
    2. No checking is done for strict RFC1179 conformance by
       the lpd server
    3. By default, all client programs will connect to the server
       on the local host (force_localhost configuration option).

  This configuration allows you to connect directly to non-LPRng systems
  using the LPRng clients,  and to have the maximum flexibility with the
  least amount of system configuration problems.  You can modify the
  /etc/printcap file, and set 'force_localhost@' to send jobs to
  a remote print server which requires connections
  to originate from a privileged port.

  The described configuration has the drawback of having SETUID clients,
  which is regarded as dangerous .

  A more cautious approch is to use the following:

    1. No LPRng programs are installed Setuid Root
       (configure --disable-setuid)
    2. All clients communicate directly to the server on the localhost.
       (i.e. - force_localhost is used)
    3. The server is started at system initialization time by root
       and it is the only program that opens a connection to a
       remote print spooler.  This now reduces the problem
       to a much more manageable level.

  If you are truly paranoid then you should read the LPRng Refernece
  Manual and the Printing Cookbook sections on Authentication,  and
  add either PGP or Kerberos authentication to your system.

KERBEROS:

  LPRng uses the MIT Kerberos 5 distribution and provides backwards
  compatibility with the MIT Kerberos 4 print support system.

  If you want to use Kerberos authentication then configure with
  the following options:

  - for Kerberos 5 only:
  ./configure --enable-kerberos
  - for Kerberos 5 and Kerberos 4 legacy support:
  ./configure --enable-kerberos --enable-mit_kerberos4

  You may need to add the following if your libraries and include files are
  not in the 'usual' places.  Replace /usr/local/lib with the directory
  where the Kerberos libraries are and /usr/local/include where the include
  files are.

    --LDFLAGS="-L/usr/local/lib" \
     --CPPFLAGS="-I/usr/local/include"

         --- CONFIGURE (autoconf) DOCUMENTATION ---

Basic Installation
==================

   These are generic installation instructions.

   The `configure' shell script attempts to guess correct values for
various system-dependent variables used during compilation.  It uses
those values to create a `Makefile' in each directory of the package.
It may also create one or more `.h' files containing system-dependent
definitions.  Finally, it creates a shell script `config.status' that
you can run in the future to recreate the current configuration, a file
`config.cache' that saves the results of its tests to speed up
reconfiguring, and a file `config.log' containing compiler output
(useful mainly for debugging `configure').

   If you need to do unusual things to compile the package, please try
to figure out how `configure' could check whether to do them, and mail
diffs or instructions to the address given in the `README' so they can
be considered for the next release.  If at some point `config.cache'
contains results you don't want to keep, you may remove or edit it.

   The file `configure.in' is used to create `configure' by a program
called `autoconf'.  You only need `configure.in' if you want to change
it or regenerate `configure' using a newer version of `autoconf'.

The simplest way to compile this package is:

  1. `cd' to the directory containing the package's source code and type
     `./configure' to configure the package for your system.  If you're
     using `csh' on an old version of System V, you might need to type
     `sh ./configure' instead to prevent `csh' from trying to execute
     `configure' itself.

     Running `configure' takes awhile.  While running, it prints some
     messages telling which features it is checking for.

  2. Type `make' to compile the package.

  3. Optionally, type `make check' to run any self-tests that come with
     the package.

  4. Type `make install' to install the programs and any data files and
     documentation.

  5. You can remove the program binaries and object files from the
     source code directory by typing `make clean'.  To also remove the
     files that `configure' created (so you can compile the package for
     a different kind of computer), type `make distclean'.  There is
     also a `make maintainer-clean' target, but that is intended mainly
     for the package's developers.  If you use it, you may have to get
     all sorts of other programs in order to regenerate files that came
     with the distribution.

Compilers and Options
=====================

   Some systems require unusual options for compilation or linking that
the `configure' script does not know about.  You can give `configure'
initial values for variables by setting them in the environment.  Using
a Bourne-compatible shell, you can do that on the command line like
this:
     CC=c89 CFLAGS=-O2 LIBS=-lposix ./configure

Or on systems that have the `env' program, you can do it like this:
     env CPPFLAGS=-I/usr/local/include LDFLAGS=-s ./configure

Compiling For Multiple Architectures
====================================

   You can compile the package for more than one kind of computer at the
same time, by placing the object files for each architecture in their
own directory.  To do this, you must use a version of `make' that
supports the `VPATH' variable, such as GNU `make'.  `cd' to the
directory where you want the object files and executables to go and run
the `configure' script.  `configure' automatically checks for the
source code in the directory that `configure' is in and in `..'.

   If you have to use a `make' that does not supports the `VPATH'
variable, you have to compile the package for one architecture at a time
in the source code directory.  After you have installed the package for
one architecture, use `make distclean' before reconfiguring for another
architecture.

Installation Names
==================

   By default, `make install' will install the package's files in
`/usr/local/bin', `/usr/local/man', etc.  You can specify an
installation prefix other than `/usr/local' by giving `configure' the
option `--prefix=PATH'.

   You can specify separate installation prefixes for
architecture-specific files and architecture-independent files.  If you
give `configure' the option `--exec-prefix=PATH', the package will use
PATH as the prefix for installing programs and libraries.
Documentation and other data files will still use the regular prefix.

   In addition, if you use an unusual directory layout you can give
options like `--bindir=PATH' to specify different values for particular
kinds of files.  Run `configure --help' for a list of the directories
you can set and what kinds of files go in them.

   If the package supports it, you can cause programs to be installed
with an extra prefix or suffix on their names by giving `configure' the
option `--program-prefix=PREFIX' or `--program-suffix=SUFFIX'.

Optional Features
=================

   Some packages pay attention to `--enable-FEATURE' options to
`configure', where FEATURE indicates an optional part of the package.
They may also pay attention to `--with-PACKAGE' options, where PACKAGE
is something like `gnu-as' or `x' (for the X Window System).  The
`README' should mention any `--enable-' and `--with-' options that the
package recognizes.

   For packages that use the X Window System, `configure' can usually
find the X include and library files automatically, but if it doesn't,
you can use the `configure' options `--x-includes=DIR' and
`--x-libraries=DIR' to specify their locations.

Specifying the System Type
==========================

   There may be some features `configure' can not figure out
automatically, but needs to determine by the type of host the package
will run on.  Usually `configure' can figure that out, but if it prints
a message saying it can not guess the host type, give it the
`--host=TYPE' option.  TYPE can either be a short name for the system
type, such as `sun4', or a canonical name with three fields:
     CPU-COMPANY-SYSTEM

See the file `config.sub' for the possible values of each field.  If
`config.sub' isn't included in this package, then this package doesn't
need to know the host type.

   If you are building compiler tools for cross-compiling, you can also
use the `--target=TYPE' option to select the type of system they will
produce code for and the `--build=TYPE' option to select the type of
system on which you are compiling the package.

Sharing Defaults
================

   If you want to set default values for `configure' scripts to share,
you can create a site shell script called `config.site' that gives
default values for variables like `CC', `cache_file', and `prefix'.
`configure' looks for `PREFIX/share/config.site' if it exists, then
`PREFIX/etc/config.site' if it exists.  Or, you can set the
`CONFIG_SITE' environment variable to the location of the site script.
A warning: not all `configure' scripts look for a site script.

Operation Controls
==================

   `configure' recognizes the following options to control how it
operates.

`--cache-file=FILE'
     Use and save the results of the tests in FILE instead of
     `./config.cache'.  Set FILE to `/dev/null' to disable caching, for
     debugging `configure'.

`--help'
     Print a summary of the options to `configure', and exit.

`--quiet'
`--silent'
`-q'
     Do not print messages saying which checks are being made.  To
     suppress all normal output, redirect it to `/dev/null' (any error
     messages will still be shown).

`--srcdir=DIR'
     Look for the package's source code in directory DIR.  Usually
     `configure' can determine that directory automatically.

`--version'
     Print the version of Autoconf used to generate the `configure'
     script, and exit.

`configure' also accepts some other, not widely useful, options.