emacs/configure1.in

### The above line is deliberately left blank.  If it starts with a #,
### some CSH's will think this is a csh script.

#### Configuration script for GNU Emacs
#### Copyright (C) 1992 Free Software Foundation, Inc.

### This file is part of GNU Emacs.

### GNU Emacs is free software; you can redistribute it and/or modify
### it under the terms of the GNU General Public License as published by
### the Free Software Foundation; either version 1, or (at your option)
### any later version.

### GNU Emacs is distributed in the hope that it will be useful,
### but WITHOUT ANY WARRANTY; without even the implied warranty of
### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
### GNU General Public License for more details.

### You should have received a copy of the GNU General Public License
### along with GNU Emacs; see the file COPYING.  If not, write to
### the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.

### Shell script to edit files and make symlinks in preparation for
### compiling Emacs.
###
### Usage: configure config_name
###
### If configure succeeds, it leaves its status in config.status.
### If configure fails after disturbing the status quo,
### 	config.status is removed.


### Remove any more than one leading "." element from the path name.
### If we don't remove them, then another "./" will be prepended to
### the file name each time we use config.status, and the program name
### will get larger and larger.  This wouldn't be a problem, except
### that since progname gets recorded in all the Makefiles this script
### produces, move-if-change thinks they're different when they're
### not.
###
### It would be nice if we could put the ./ in a \( \) group and then
### apply the * operator to that, so we remove as many leading ./././'s
### as are present, but some seds (like Ultrix's sed) don't allow you to
### apply * to a \( \) group.  Bleah.
progname="`echo $0 | sed 's:^\./\./:\./:'`"


#### Usage messages.

short_usage="Type \`${progname} --usage' for more information about options."

long_usage="Usage: ${progname} CONFIGURATION [-OPTION[=VALUE] ...]

Set compilation and installation parameters for GNU Emacs, and report.
CONFIGURATION specifies the machine and operating system to build for.
For example:
        ${progname} sparc-sun-sunos4.1
configures Emacs to build on a Sun Sparc machine running SunOS 4.1, and 
        ${progname} decstation
configures Emacs to run on a DECstation running Ultrix.  See \`etc/MACHINES'.

The --with-x, --with-x11 and --with-x10 options specify what window
	system to use; if all are omitted, use X11 if present.  If you
	don't want X, specify \`--with-x=no'.

The --x-includes=DIR option tells the build process where to search
	for the X Windows header files.  DIR should have a
	subdirectory called \`X11' which contains \`X.h', \`Xlib.h', and
	the rest of the header files; DIR should not contain \`X11'
	itself.  If this option is omitted, the build process assumes
	they exist in a directory the compiler checks by default.

The --x-libraries=DIR option tells the build process where to look for
	the X windows libraries.  If this option is omitted, the build
	process assumes they are in a directory the compiler checks by
	default.

The --with-gcc option says that the build process should use GCC to
	compile Emacs.  If you have GCC but don't want to use it,
	specify \`--with-gcc=no'.  \`configure' tries to guess whether
	or not you have GCC by searching your executable path, but if
	it guesses incorrectly, you may need to use this.

The --srcdir=DIR option specifies that the configuration and build
	processes should look for the Emacs source code in DIR, when
	DIR is not the current directory.  This option doesn't work yet.

If successful, ${progname} leaves its status in config.status.  If
unsuccessful after disturbing the status quo, it removes config.status."


#### Option processing.

### These are the names of CPP symbols we want to define or leave undefined
### in src/config.h; their values are given by the shell variables of the same
### names.
config_h_opts=" \
HAVE_X_WINDOWS HAVE_X11 HAVE_X_MENU \
SIGTYPE GNU_MALLOC REL_ALLOC LISP_FLOAT_TYPE HAVE_CONST \
LD_SWITCH_X_SITE C_SWITCH_X_SITE HAVE_XFREE386"

### Record all the arguments, so we can save them in config.status.
arguments="$@"

while [ $# != 0 ]; do
  arg="$1"
  case "${arg}" in

    ## Anything starting with a hyphen we assume is an option.
    -* )

      ## Separate the switch name from the value it's being given.
      case "${arg}" in
        -*=*)
	  opt=`echo ${arg} | sed 's:^-*\([^=]*\)=.*$:\1:'`
	  val=`echo ${arg} | sed 's:^-*[^=]*=\(.*\)$:\1:'`
	  valomitted=no
	;;
        -*)
          ## If FOO is a boolean argument, --FOO is equivalent to
          ## --FOO=yes.  Otherwise, the value comes from the next
          ## argument - see below.
	  opt=`echo ${arg} | sed 's:^-*\(.*\)$:\1:'`
          val="yes"
          valomitted=yes
        ;;
      esac

      ## Change `-' in the option name to `_'.
      optname="${opt}"
      opt="`echo ${opt} | tr - _`"

      ## Process the option.
      case "${opt}" in

        ## Has the user specified which window systems they want to support?
        "with_x" | "with_x11" | "with_x10" )
	  ## Make sure the value given was either "yes" or "no".
	  case "${val}" in
	    y | ye | yes )	val=yes ;;
	    n | no )		val=no  ;;
	    * )
	      (echo "${progname}: the \`--${optname}' option is supposed to have a boolean value.
Set it to either \`yes' or \`no'."
	       echo "${short_usage}") >&2
	      exit 1
	    ;;
	  esac
          eval "${opt}=\"${val}\""
        ;;

	## Has the user specified whether or not they want GCC?
	"with_gcc" )
	  ## Make sure the value given was either "yes" or "no".
	  case "${val}" in
	    y | ye | yes )	val=yes ;;
	    n | no )		val=no  ;;
	    * )
	      (echo "${progname}: the \`--${optname}' option is supposed to have a boolean value.
Set it to either \`yes' or \`no'."
	       echo "${short_usage}") >&2
	      exit 1
	    ;;
	  esac
          eval "${opt}=\"${val}\""
        ;;

        ## Has the user specified a source directory?
	"srcdir" )
	  ## If the value was omitted, get it from the next argument.
	  if [ "${valomitted}" = "yes" ]; then
	    ## Get the next argument from the argument list, if there is one.
            if [ $# = 1 ]; then
	      (echo "${progname}: You must give a value for the \`--${optname}' option, as in
    \`--${optname}=FOO'."
	       echo "${short_usage}") >&2
	      exit 1
	    fi
	    shift; val="$1"
	  fi
          srcdir="${val}"

	  echo "${progname}: Beware - the \`--srcdir' option doesn't work yet." >&2
	;;

	## Has the user tried to tell us where the X files are?
	## I think these are dopey, but no less than three alpha
	## testers, at large sites, have said they have their X files
	## installed in odd places.
	"x_includes" )
	  ## If the value was omitted, get it from the next argument.
	  if [ "${valomitted}" = "yes" ]; then
	    ## Get the next argument from the argument list, if there is one.
            if [ $# = 1 ]; then
	      (echo "${progname}: You must give a value for the \`--${optname}' option, as in
    \`--${optname}=FOO'."
	       echo "${short_usage}") >&2
	      exit 1
	    fi
	    shift; val="$1"
	  fi
	  x_includes="${val}"
	  C_SWITCH_X_SITE="-I${x_includes}"
        ;;
	"x_libraries" )
	  ## If the value was omitted, get it from the next argument.
	  if [ "${valomitted}" = "yes" ]; then
	    ## Get the next argument from the argument list, if there is one.
            if [ $# = 1 ]; then
	      (echo "${progname}: You must give a value for the \`--${optname}' option, as in
    \`--${optname}=FOO'."
	       echo "${short_usage}") >&2
	      exit 1
	    fi
	    shift; val="$1"
	  fi
	  x_libraries="${val}"
	  LD_SWITCH_X_SITE="-L${x_libraries}"
        ;;

	## Has the user asked for some help?
	"usage" | "help" )
	  echo "${long_usage}" | more
	  exit
	;;

        ## We ignore all other options silently.
      esac
    ;;

    ## Anything not starting with a hyphen we assume is a
    ## configuration name.
    *)
      configuration=${arg}
    ;;

  esac
  shift
done

if [ "${configuration}" = "" ]; then
  (echo "${progname}: You must specify a configuration name as an argument."
   echo "${short_usage}") >&2
  exit 1
fi


#### Decide where the source is.
case "${srcdir}" in

  ## If it's not specified, see if  `.' or `..' might work.
  "" )
    if [ -f "./src/lisp.h" -a -f "./lisp/version.el" ]; then
      srcdir=`pwd`
    else
      if [ -f "../src/lisp.h" -a -f "../lisp/version.el" ]; then
	srcdir=`(cd .. ; pwd)`
      else
	(echo "\
${progname}: Neither the current directory nor its parent seem to
contain the Emacs sources.  If you do not want to build Emacs in its
source tree, you should run \`${progname}' in the directory in which
you wish to build Emacs, using its \`--srcdir' option to say where the
sources may be found."
	 echo "${short_usage}") >&2
	exit 1
      fi
    fi
  ;;

  ## Otherwise, check if the directory they specified is okay.
  * )
    if [ ! -d "${srcdir}" -o ! -f "${srcdir}/src/lisp.h" -o ! -f "${srcdir}/lisp/version.el" ]; then
      (echo "\
${progname}: The directory specified with the \`--srcdir' option,
\`${srcdir}', doesn't seem to contain the Emacs sources.  You should
either run the \`${progname}' script at the top of the Emacs source
tree, or use the \`--srcdir' option to specify where the Emacs sources
are."
       echo "${short_usage}") >&2
      exit 1
    fi
  ;;

esac

### Make the necessary directories, if they don't exist.
if [ ! -d ./src ]; then
  mkdir ./src
fi
if [ ! -d ./lib-src ]; then
  mkdir ./lib-src
fi
if [ ! -d ./cpp ]; then
  mkdir ./cpp
fi
if [ ! -d ./oldXMenu ]; then
  mkdir ./oldXMenu
fi


#### Given the configuration name, set machfile and opsysfile to the
#### names of the m/*.h and s/*.h files we should use.

### Canonicalize the configuration name.
echo "Checking the configuration name."
if configuration=`${srcdir}/config.sub "${configuration}"` ; then : ; else
  exit $?
fi

### If you add support for a new configuration, add code to this
### switch statement to recognize your configuration name and select
### the appropriate operating system and machine description files.

### You would hope that you could choose an m/*.h file pretty much
### based on the machine portion of the configuration name, and an s-
### file based on the operating system portion.  However, it turns out
### that each m/*.h file is pretty manufacturer-specific - for
### example, apollo.h, hp9000s300.h, mega68k, news.h, and tad68k are
### all 68000 machines; mips.h, pmax.h, and news-risc are all MIPS
### machines.  So we basically have to have a special case for each
### configuration name.
###
### As far as handling version numbers on operating systems is
### concerned, make sure things will fail in a fixable way.  If
### /etc/MACHINES doesn't say anything about version numbers, be
### prepared to handle anything reasonably.  If version numbers
### matter, be sure /etc/MACHINES says something about it.
###
### Eric Raymond says we should accept strings like "sysvr4" to mean
### "System V Release 4"; he writes, "The old convention encouraged
### confusion between `system' and `release' levels'."

machine='' opsys='' unported='false'
case "${configuration}" in

  ## Alliant machines
  ## Strictly speaking, we need the version of the alliant operating
  ## system to choose the right machine file, but currently the
  ## configuration name doesn't tell us enough to choose the right
  ## one; we need to give alliants their own operating system name to
  ## do this right.  When someone cares, they can help us.
  fx80-alliant-* )
    machine=alliant4 opsys=bsd4-2
  ;;
  i860-alliant-* )
    machine=alliant-2800 opsys=bsd4-3
  ;;

  ## Altos 3068
  m68*-altos-sysv* )
    machine=altos opsys=usg5-2
  ;;
    
  ## Amdahl UTS
  580-amdahl-sysv* )
    machine=amdahl opsys=usg5-2-2
  ;;

  ## Appallings - I mean, Apollos - running Domain
  m68*-apollo* )
    machine=apollo opsysfile=bsd4-2.h
  ;;

  ## AT&T 3b2, 3b5, 3b15, 3b20
  we32k-att-sysv* )
    machine=att3b opsys=usg5-2-2
  ;;

  ## AT&T 3b1 - The Mighty Unix PC!
  m68*-att-sysv* )
    machine=7300 opsys=usg5-2-2
  ;;

  ## Bull sps7
  m68*-bull-sysv* )
    machine=sps7 opsys=usg5-2
  ;;

  ## CCI 5/32, 6/32 -- see "Tahoe".

  ## Celerity
  ## I don't know what configuration name to use for this; config.sub
  ## doesn't seem to know anything about it.  Hey, Celerity users, get
  ## in touch with us!
  celerity-celerity-bsd* )
    machine=celerity opsys=bsd4-2
  ;;

  ## Clipper
  ## What operating systems does this chip run that Emacs has been
  ## tested on?
  clipper-* )
    machine=clipper
    ## We'll use the catch-all code at the bottom to guess the
    ## operating system.
  ;;

  ## Convex
  *-convex-bsd* )
    machine=convex opsys=bsd4-3
  ;;

  ## Cubix QBx/386
  i386-cubix-sysv* )
    machine=intel386 opsys=usg5-3
  ;;

  ## Cydra 5
  cydra*-cydrome-sysv* )
    machine=cydra5 opsys=usg5-3
  ;;

  ## DECstations
  mips-dec-ultrix[0-3].* | mips-dec-ultrix4.0 | mips-dec-bsd4.2 )
    machine=pmax opsys=bsd4-2
  ;;
  mips-dec-ultrix* | mips-dec-bsd* )
    machine=pmax opsys=bsd4-3
  ;;
  mips-dec-osf* )
    machine=pmax opsys=osf1
  ;;

  ## Motorola Delta machines
  m68*-motorola-sysv* )
    machine=delta opsys=usg5-3
  ;;
  m88k-motorola-sysv* | m88k-motorola-m88kbcs* )
    machine=delta88k opsys=usg5-3
  ;;

  ## Dual machines
  m68*-dual-sysv* )
    machine=dual opsys=usg5-2
  ;;
  m68*-dual-uniplus* )
    machine=dual opsys=unipl5-2
  ;;

  ## Elxsi 6400
  elxsi-elxsi-sysv* )
    machine=elxsi opsys=usg5-2
  ;;

  ## Encore machines
  ns16k-encore-bsd* )
    machine=ns16000 opsys=umax
  ;;

  ## The GEC 93 - apparently, this port isn't really finished yet.

  ## Gould Power Node and NP1
  pn-gould-bsd4.2 )
    machine=gould opsys=bsd4-2
  ;;
  pn-gould-bsd4.3 )
    machine=gould opsys=bsd4-3
  ;;
  np1-gould-bsd* )
    machine=gould-np1 opsys=bsd4-3
  ;;

  ## Honeywell XPS100
  xps*-honeywell-sysv* )
    machine=xps100 opsys=usg5-2
  ;;

  ## HP 9000 series 200 or 300
  m68*-hp-bsd* )
    machine=hp9000s300 opsys=bsd4-3
  ;;
  ## HP/UX 8 doesn't run on these machines, so use HP/UX 7.
  m68*-hp-hpux* )
    machine=hp9000s300 opsys=hpux
  ;;

  ## HP 9000 series 800, running HP/UX
  hppa1.0-hp-hpux* )
    machine=hp9000s800 opsys=hpux
  ;;

  ## Orion machines
  orion-orion-bsd* )
    machine=orion opsys=bsd4-2
  ;;
  clipper-orion-bsd* )
    machine=orion105 opsys=bsd4-2
  ;;

  ## IBM machines
  i386-ibm-aix1.1 )
    machine=ibmps2-aix opsys=usg5-2-2
  ;;
  i386-ibm-aix1.2 )
    machine=ibmps2-aix opsys=usg5-3
  ;;
  rs6000-ibm-aix3.1 )
    machine=ibmrs6000 opsys=aix3-1
  ;;
  rs6000-ibm-aix3.2 | rs6000-ibm-aix* )
    machine=ibmrs6000 opsys=aix3-2
  ;;
  romp-ibm-bsd* )
    machine=ibmrt opsys=bsd4-2
  ;;
  romp-ibm-aix* )
    machine=ibmrt-aix opsys=usg5-2-2
  ;;

  ## Integrated Solutions `Optimum V'
  m68*-isi-bsd4.2 )
    machine=isi-ov opsys=bsd4-2
  ;;
  m68*-isi-bsd4.3 )
    machine=isi-ov opsys=bsd4-3
  ;;

  ## Intel 386 machines where we do care about the manufacturer
  i[34]86-intsys-sysv* )
    machine=is386 opsys=usg5-2-2
  ;;
  ## Intel 386 machines where we don't care about the manufacturer
  i[34]86-* )
    machine=intel386
    case "${configuration}" in
      *-isc1.* | *-isc2.[01]* )	opsys=386-ix ;;
      *-isc2.2 )		opsys=isc2-2 ;;
      *-isc* )			opsys=isc3-0 ;;
      *-esix* )			opsys=esix ;;
      *-xenix* )		opsys=xenix ;;
      ## Otherwise, we'll fall through to the generic opsys code at the bottom.
    esac
  ;;

  ## Silicon Graphics machines
  ## Iris 2500 and Iris 2500 Turbo (aka the Iris 3030)
  m68*-sgi-iris3.5 )
    machine=irist opsys=iris3-5
  ;;
  m68*-sgi-iris3.6 | m68*-sgi-iris*)
    machine=irist opsys=iris3-6
  ;;
  ## Iris 4D
  mips-sgi-irix3.* )
    machine=iris4d opsys=irix3-3
  ;;
  mips-sgi-irix4.* | mips-sgi-irix* )
    machine=iris4d opsys=irix4-0
  ;;

  ## Masscomp machines
  m68*-masscomp-rtu )
    machine=masscomp opsys=rtu
  ;;

  ## Megatest machines
  m68*-megatest-bsd* )
    machine=mega68 opsys=bsd4-2
  ;;

  ## Workstations sold by MIPS
  ## This is not necessarily all workstations using the MIPS processor -
  ## Irises are produced by SGI, and DECstations by DEC.

  ## etc/MACHINES lists mips.h and mips4.h as possible machine files,
  ## and usg5-2-2 and bsd4-3 as possible OS files.  The only guidance
  ## it gives for choosing between the alternatives seems to be "Use
  ## -machine=mips4 for RISCOS version 4; use -opsystem=bsd4-3 with
  ## the BSD world."  I'll assume that these are instructions for
  ## handling two odd situations, and that every other situation
  ## should use mips.h and usg5-2-2, they being listed first.
  mips-mips-riscos4* )
    machine=mips4 opsys=usg5-2-2
  ;;
  mips-mips-bsd* )
    machine=mips opsys=bsd4-3
  ;;
  mips-mips-* )
    machine=mips opsys=usg5-2-2
  ;;

  ## The complete machine from National Semiconductor
  ns32k-ns-genix* )
    machine=ns32000 opsys=usg5-2
  ;;

  ## NCR machines
  m68*-ncr-sysv2* | m68*-ncr-sysvr2* )
    machine=tower32 opsys=usg5-2-2
  ;;
  m68*-ncr-sysv3* | m68*-ncr-sysvr3* )
    machine=tower32v3 opsys=usg5-3
  ;;

  ## Nixdorf Targon 31
  m68*-nixdorf-sysv* )
    machine=targon31 opsys=usg5-2-2
  ;;

  ## Nu (TI or LMI)
  m68*-nu-sysv* )
    machine=nu opsys=usg5-2
  ;;

  ## Plexus
  m68*-plexus-sysv* )
    machine=plexus opsys=usg5-2
  ;;

  ## Prime EXL
  i386-prime-sysv* )
    machine=i386 opsys=usg5-3
  ;;

  ## Pyramid machines
  ## I don't really have any idea what sort of processor the Pyramid has,
  ## so I'm assuming it is its own architecture.
  pyramid-pyramid-bsd* )
    machine=pyramid opsys=bsd4-2
  ;;

  ## Sequent Balance
  ns32k-sequent-bsd4.2 )
    machine=sequent opsys=bsd4-2
  ;;
  ns32k-sequent-bsd4.3 )
    machine=sequent opsys=bsd4-3
  ;;
  ## Sequent Symmetry
  i386-sequent-bsd* )
    machine=symmetry opsys=bsd4-3
  ;;

  ## SONY machines
  m68*-sony-bsd4.2 )
    machine=news opsys=bsd4-2
  ;;
  m68*-sony-bsd4.3 )
    machine=news opsys=bsd4-3
  ;;
  mips-sony-bsd* )
    machine=news-risc opsys=bsd4-3
  ;;

  ## Stride
  m68*-stride-sysv* )
    machine=stride opsys=usg5-2
  ;;

  ## Suns
  *-sun-sunos* | *-sun-bsd* )
    case "${configuration}" in
      m68*-sunos1* )	machine=sun1 ;;
      m68*-sunos2* )	machine=sun2 ;;
      m68* )		machine=sun3 ;;
      i[34]86* )	machine=sun386 ;;
      sparc* )		machine=sparc ;;
      * )		unported=true ;;
    esac
    case "${configuration}" in
      *-sunos4.0*	  ) opsys=sunos4-0 ;;
      *-sunos4* | *-sunos ) opsys=sunos4-1 ;;
      *			  ) opsys=bsd4-2   ;;
    esac
  ;;

  ## Tadpole 68k
  m68*-tadpole-sysv* )
    machine=tad68k opsys=usg5-3
  ;;

  ## Tahoe machines
  tahoe-tahoe-bsd4.2 )
    machine=tahoe opsys=bsd4-2
  ;;
  tahoe-tahoe-bsd4.3 )
    machine=tahoe opsys=bsd4-3
  ;;

  ## Tandem Integrity S2
  mips-tandem-sysv* )
    machine=tandem-s2 opsys=usg5-3
  ;;

  ## Tektronix 16000 box (6130?)
  ns16k-tektronix-bsd* )
    machine=ns16000 opsys=bsd4-2
  ;;
  ## Tektronix 4300
  ## src/m/tek4300.h hints that this is a m68k machine.
  m68*-tektronix-bsd* )
    machine=tex4300 opsys=bsd4-3
  ;;

  ## Titan P2 or P3
  ## We seem to have lost the machine-description file titan.h!
  titan-titan-sysv* )
    machine=titan opsys=usg5-3
  ;;
  
  ## Ustation E30 (SS5E)
  m68*-unisys-uniplus* )
    machine=ustation opsystem=unipl5-2
  ;;

  ## Vaxen.
  vax-dec-* )
    machine=vax
    case "${configuration}" in
      *-bsd4.1 ) 					opsys=bsd4-1 ;;
      *-bsd4.2 | *-ultrix[0-3].* | *-ultrix4.0 )	opsys=bsd4-2 ;;
      *-bsd4.3 | *-ultrix* ) 				opsys=bsd4-3 ;;
      *-sysv[01]* | *-sysvr[01]* ) 			opsys=usg5-0 ;;
      *-sysv2* | *-sysvr2* )				opsys=usg5-2 ;;
      *-vms* ) 						opsys=vms ;;
      * ) 						unported=true
    esac
  ;;

  ## Whitechapel MG1
  ns16k-whitechapel-* )
    machine=mg1
    ## We don't know what sort of OS runs on these; we'll let the
    ## operating system guessing code below try.
  ;;

  ## Wicat
  m68*-wicat-sysv* )
    machine=wicat opsys=usg5-2
  ;;

  * )
    unported=true
  ;;
esac

### If the code above didn't choose an operating system, just choose
### an operating system based on the configuration name.  You really
### only want to use this when you have no idea what the right
### operating system is; if you know what operating systems a machine
### runs, it's cleaner to make it explicit in the case statement
### above.
if [ ! "${opsys}" ]; then
  case "${configuration}" in
    *-bsd4.[01] )	opsys=bsd4-1 ;;
    *-bsd4.2 )		opsys=bsd4-2 ;;
    *-bsd4.3 )		opsys=bsd4-3 ;;
    *-sysv0 | *-sysvr0 )		opsys=usg5-0 ;;
    *-sysv2 | *-sysvr2 )		opsys=usg5-2 ;;
    *-sysv2.2 | *-sysvr2.2 )		opsys=usg5-2-2 ;;
    *-sysv3 | *-sysvr3 )		opsys=usg5-3 ;;
    *-sysv4 | *-sysvr4 )		opsys=usg5-4 ;;
    * )
      unported=true
    ;;
  esac
fi

if $unported ; then
  (echo "${progname}: Emacs hasn't been ported to \`${configuration}' systems."
   echo "${progname}: Check \`etc/MACHINES' for recognized configuration names."
  ) >&2
  exit 1
fi

machfile="m/${machine}.h"
opsysfile="s/${opsys}.h"


#### Choose a window system.
echo "Checking window system."
window_system=''
case "${with_x}" in
  yes )
    window_system=${window_system}x11
  ;;
  no )
    window_system=${window_system}none
esac
case "${with_x11}" in
  yes )
    window_system=${window_system}x11
  ;;
esac
case "${with_x10}" in
  yes )
    window_system=${window_system}x10
  ;;
esac

case "${window_system}" in
  "none" | "x11" | "x10" ) ;;
  "" )
    echo "  No window system specifed.  Looking for X Windows."
    window_system=none
    if [ -r /usr/lib/libX11.a \
	 -o -d /usr/include/X11 \
         -o -d /usr/X386/include ]; then
      window_system=x11
    fi
  ;;
  * )
    echo "Don\'t specify the window system more than once." >&2
    exit 1
  ;;
esac

case "${window_system}" in
  x11 )
    HAVE_X_WINDOWS=yes
    HAVE_X11=yes
    echo "  Using X11."
  ;;
  x10 )
    HAVE_X_WINDOWS=yes
    HAVE_X11=no
    echo "  Using X10."
  ;;
  none )
    HAVE_X_WINDOWS=no
    HAVE_X11=no
    echo "  Using no window system."
  ;;
esac

### If we're using X11, we should use the X menu package.
HAVE_X_MENU=no
case ${HAVE_X11} in
  yes )
    HAVE_X_MENU=yes
  ;;
esac

### Check for XFree386.  It needs special hacks.
case ${window_system} in
  x11 )
    if [ -d /usr/X386/include ]; then
      HAVE_XFREE386=yes
      if [ "${C_SWITCH_X_SITE}" = "" ]; then
	C_SWITCH_X_SITE="-I/usr/X386/include"
      fi
    fi
  ;;
esac

#### Choose a compiler.
echo "Checking compilers."
if [ "${with_gcc}" = "" ]; then
  echo "  Searching load path for GCC."
  temppath=`echo $PATH | sed 's/^:/.:/
			      s/::/:.:/g
			      s/:$/:./
			      s/:/ /g'`
  default_cc=`(
    for dir in ${temppath}; do
      if [ -f ${dir}/gcc ]; then echo gcc; exit 0; fi
    done
    echo cc
  )`
else
  case ${with_gcc} in
    "yes" ) default_cc="gcc" ;;
    "no"  ) default_cc="cc"  ;;
  esac
fi

case "${default_cc}" in
  "gcc" )
    echo "  Using GCC."
    default_cflags='-g -O'
  ;;
  * )
    echo "  Using the system's CC."
    default_cflags='-g'
  ;;
esac


#### Does this compiler support the `const' keyword?
#### The code for this test was adapted from autoconf's test.
echo "Checking if the compiler supports \`const'."
rm -f conftest*
compile='${default_cc} conftest.c -o conftest >/dev/null 2>&1'
echo "
main() { exit(0); } t() { /* Ultrix mips cc rejects this.  */
typedef int charset[2]; const charset x;
/* SunOS 4.1.1 cc rejects this. */
char const *const *p;
char **p2;
/* HPUX 7.0 cc rejects these. */
++p;
p2 = (char const* const*) p;
 }" > conftest.c
if eval $compile; then
  echo "  It seems to."
  HAVE_CONST=yes
else
  echo "  It doesn't seem to."
  HAVE_CONST=no
fi
rm -f conftest*

#### What is the return type of a signal handler?

### We run /usr/include/signal.h through cpp and grep for the
### declaration of the signal function.  Yuck.
echo "Looking for return type of signal handler functions."
signal_h_file=''
if [ -r /usr/include/signal.h ]; then
  signal_h_file=/usr/include/signal.h
elif [ -r /usr/include/sys/signal.h ]; then
  signal_h_file=/usr/include/sys/signal.h
fi
SIGTYPE=void
if [ "${signal_h_file}" ]; then
  sigpattern='[ 	]*([ 	]*\*[ 	]*signal[ 	]*('

  ## We make a copy whose name ends in .c, so the compiler
  ## won't complain about having only been given a .h file.
  tempcname="configure.tmp.$$.c"
  cp ${signal_h_file}  ${tempcname}
  if ${default_cc} -E ${tempcname} | grep "int${sigpattern}" > /dev/null; then
    SIGTYPE=int
  fi
  rm -f ${tempcname}
fi
echo "  Guessing that signals return \`${SIGTYPE}'."


#### Extract some information from the operating system and machine files.

echo "Examining the machine- and system-dependent files to find out"
echo " - which libraries the lib-src programs will want, and"
echo " - whether the GNU malloc routines are usable."
tempcname="configure.tmp.$$.c"
echo '
#include "'${srcdir}'/src/'${opsysfile}'"
#include "'${srcdir}'/src/'${machfile}'"
#ifndef LIBS_MACHINE
#define LIBS_MACHINE
#endif
#ifndef LIBS_SYSTEM
#define LIBS_SYSTEM
#endif
@configure@ libsrc_libs=LIBS_MACHINE LIBS_SYSTEM
#ifdef SYSTEM_MALLOC
@configure@ system_malloc=yes
#else
@configure@ system_malloc=no
#endif
' > ${tempcname}
eval `${default_cc} -E ${tempcname} \
       | grep '@configure@' \
       | sed -e 's/^@configure@ \([^=]*=\)\(.*\)$/\1"\2"/'`
rm ${tempcname}

# Do the opsystem or machine files prohibit the use of the GNU malloc?
# Assume not, until told otherwise.
GNU_MALLOC=yes
if [ "${system_malloc}" = "yes" ]; then
  GNU_MALLOC=no
  GNU_MALLOC_reason="
  (The GNU allocators don't work with this system configuration.)"
fi

if [ ! "${REL_ALLOC}" ]; then
  REL_ALLOC=${GNU_MALLOC}
fi

LISP_FLOAT_TYPE=yes


#### Find out which version of Emacs this is.
version=`grep 'defconst[	 ]*emacs-version' ${srcdir}/lisp/version.el \
	 | sed -e 's/^.*"\([0-9][0-9]*\.[0-9][0-9]*\)\..*$/\1/'`
if [ ! "${version}" ]; then
  echo "${progname}: can't find current emacs version in
	\`${srcdir}/lisp/version.el'." >&2
  exit 1
fi


#### Make the proper settings in `src/config.h'.
rm -f config.status
set -e

echo "Making \`./src/config.h' from \`${srcdir}/src/config.h.in'."
sed_flags="-e 's:@machine@:${machfile}:' -e 's:@opsystem@:${opsysfile}:'"

for flag in ${config_h_opts}; do
  val=`eval echo '$'${flag}`
  case ${val} in
    no | "")
      f="-e 's:.*#define ${flag}.*:/\\* #define ${flag} \\*/:'"
    ;;
    yes)
      f="-e 's:.*#define ${flag}.*:#define ${flag}:'"
    ;;
    *)
      f="-e 's:.*#define ${flag}.*:#define ${flag} ${val}:'"
    ;;
  esac
  sed_flags="${sed_flags} ${f}"
done

rm -f ./src/config.h.tmp
(echo "/* This file is generated by \`${progname}' from"
 echo "   \`${srcdir}/src/config.h.in'."
 echo "   If you are thinking about editing it, you should seriously consider"
 echo "   running \`${progname} instead, or editing"
 echo "   \`${srcdir}/src/config.h.in' itself." 
 eval '/bin/sed '${sed_flags}' < "${srcdir}/src/config.h.in"'
) > src/config.h.tmp
${srcdir}/move-if-change src/config.h.tmp src/config.h
### Remind people not to edit this.
chmod -w src/config.h


#### Modify the parameters in the top-level Makefile.
echo "Producing \`Makefile' from \`${srcdir}/Makefile.in'."
rm -f Makefile.tmp
(echo "\
# This file is generated by \`${progname}' from
# \`${srcdir}/Makefile.in'.
# If you are thinking about editing it, you should seriously consider
# running \`${progname}' instead, or editing
# \`${srcdir}/Makefile.in' itself."
 /bin/sed < ${srcdir}/Makefile.in				\
 -e 's|^configname *=.*$|configname='"${configuration}"'|'	\
 -e 's|^version *=.*$|version='"${version}"'|' 		\
 -e 's|^srcdir *=.*$|srcdir='"${srcdir}"'|' 			\
 -e 's|^CC *=.*$|CC='"${default_cc}"'|'			\
 -e 's|^CONFIG_CFLAGS *=.*$|CONFIG_CFLAGS='"${default_cflags}"'|'	\
 -e 's|^LOADLIBES *=.*$|LOADLIBES='"${libsrc_libs}"'|'	\
 -e '/^# DIST: /d') > Makefile.tmp
${srcdir}/move-if-change Makefile.tmp Makefile

### I'm commenting out this section until I bring the `build-install' script
### into line with the rest of the configuration stuff.

### # Modify the parameters in the `build-install' script.
### echo "Producing \`./build-install' from \`${srcdir}/build-install.in'."
### rm -f ./build-install.tmp
### (echo "\
### # This file is generated by \`${progname}' from \`${srcdir}/build-install.in'.
### # If you are thinking about editing it, you should seriously consider
### # editing \`./build-install.in' itself, or running \`${progname}' instead."
###  /bin/sed < ${srcdir}/build-install.in			\
###  -e 's;^\(prefix=\).*$;\1'"${prefix};"			\
###  -e 's;^\(bindir=\).*$;\1'"${bindir};"			\
###  -e 's;^\(lisppath=\).*$;\1'"${lisppath};"		\
###  -e 's;^\(datadir=\).*$;\1'"${datadir};"		\
###  -e 's;^\(lockdir=\).*$;\1'"${lockdir};"		\
###  -e 's;^\(libdir=\).*$;\1'"${libdir};") > ./build-install.tmp
### ${srcdir}/move-if-change build-install.tmp build-install
### # Remind people not to edit this.
### chmod -w build-install
### chmod +x build-install


#### Describe the results.

### Create a verbal description of what we have done.

message="Configured for \`${configuration}'.

  What operating system and machine description files should Emacs use?
        \`${opsysfile}' and \`${machfile}'
  Should Emacs use the GNU version of malloc?             ${GNU_MALLOC}${GNU_MALLOC_reason}
  Should Emacs use the relocating allocator for buffers?  ${REL_ALLOC}
  What window system should Emacs use?                    ${window_system}
  What compiler should emacs be built with?               ${default_cc}
  Should the compilation use \`-g' and/or \`-O'?            ${default_cflags-neither}${x_includes+
  Where do we find X Windows header files?                }${x_includes}${x_libraries+
  Where do we find X Windows libraries?                   }${x_libraries}"

### Write config.status, documenting the damage we have done.

(echo "\
#!/bin/sh
### This file is generated by \`${progname}.'
### If you are thinking about editing it, you should seriously consider
### running \`${progname}' instead.
"
 echo "${message}" | sed -e 's/^/# /'
 echo "exec '${progname}' ${arguments} "'$@') > config.status

### Remind people not to edit this.
chmod -w config.status
chmod +x config.status

### Print the description.
echo
echo "${message}"

exit 0