update.

[chise/xemacs-chise.git-] / configure.in

dnl Define our own header notice with own copyright
define([AC_INIT_NOTICE],
[#### Configuration script for XEmacs.  Largely divergent from FSF.
#### Guess values for system-dependent variables and create Makefiles.
#### Generated automatically using autoconf version] AC_ACVERSION [
#### Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
#### Copyright (C) 1993-1995 Board of Trustees, University of Illinois.
#### Copyright (C) 1996, 1997 Sun Microsystems, Inc.
#### Copyright (C) 1995, 1996 Ben Wing.
#### Copyright (C) 2000, 2001 Martin Buchholz.
#### Copyright (C) 1998, 1999 J. Kean Johnston.

### Don't edit this script!
### This script was automatically generated by the `autoconf' program
### from the file `./configure.in'.
### To rebuild it, execute the command
###     autoconf
### in the this directory.  You must have autoconf version 2.13 or later.
### Note: this script has not yet been ported to autoconf version 2.5x.

### This file is part of XEmacs.

### XEmacs 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 2, or (at your
### option) any later version.

### XEmacs 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 XEmacs; see the file COPYING.  If not, write to the Free
### Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
### 02111-1307, USA.

### For usage, run `./configure --help'
### For more detailed information on building and installing XEmacs,
### read the file `INSTALL'.
###
### If configure succeeds, it leaves its status in config.status.
### A log of configuration tests can be found in config.log.
### If configure fails after disturbing the status quo,
###     config.status is removed.
])

dnl Since XEmacs has configuration requirements that autoconf cannot
dnl meet, this file is an unholy marriage of custom-baked
dnl configuration code and autoconf macros.

dnl We use the m4 quoting characters [ ] (as established by the
dnl autoconf system), so quote them like this: [[foo]]

AC_PREREQ(2.13)dnl
dnl Redefine some standard autoconf macros
dnl here is how XEmacs is different:
dnl - no cache file
dnl - non-standard options
dnl - support for extra-verbosity
dnl - ordinary libs are handled separately from X libs (might be a mistake)
dnl - various random kludges (e.g. -with-dnet=no)

dnl PRINT_VAR(var var ...)  prints values of shell variables
define([PRINT_VAR],[for var in patsubst([$1],[[
]+],[ ]); do eval "echo \"$var = '\$$var'\""; done])

dnl Disable cache files:
dnl This is controversial, but I am convinced this is the right way to go,
dnl at least by default.  Otherwise there are too many surprises.
define([AC_CACHE_LOAD], )dnl
define([AC_CACHE_SAVE], )dnl
define([AC_CACHE_VAL], [
$2
])dnl

dnl Redefine AC_TRY_RUN_NATIVE to not throw away stderr while running
dnl AC_TRY_RUN_NATIVE(PROGRAM, [ACTION-IF-TRUE [, ACTION-IF-FALSE]])
define([AC_TRY_RUN_NATIVE],
[cat > conftest.$ac_ext <<EOF
[#]line __oline__ "configure"
#include "confdefs.h"
[$1]
EOF
if AC_TRY_EVAL(ac_link) && test -s conftest && (./conftest; exit $?) 2>&AC_FD_CC
then
dnl Do not remove the temporary files here, so they can be examined.
  ifelse([$2], , :, [$2])
else
  conftest_rc="$?"
  echo "configure: failed program was:" >&AC_FD_CC
  cat conftest.$ac_ext >&AC_FD_CC
ifelse([$3], , , [  rm -fr conftest*
  $3
])dnl
fi
rm -fr conftest*])dnl AC_TRY_RUN_NATIVE


dnl Avoid spurious cross-compiling warnings from AC_TRY_RUN
dnl XEmacs is unlikely to ever cross-compile
define([AC_TRY_RUN],[AC_TRY_RUN_NATIVE([$1], [$2], [$3])])dnl

dnl Redefine AC_DEFINE* to provide more output if extra_verbose
dnl Set VARIABLE to VALUE, verbatim, or 1.
dnl AC_DEFINE(VARIABLE [, VALUE])
define([AC_DEFINE],
[{ test "$extra_verbose" = "yes" && cat << \EOF
    Defining $1[]ifelse($#, 2, [ = $2],)
EOF
cat >> confdefs.h <<\EOF
[#define] $1 ifelse($#, 2, [$2], 1)
EOF
}
])dnl AC_DEFINE

define([AC_DEFINE_UNQUOTED],
[{ test "$extra_verbose" = "yes" && cat << EOF
    Defining $1[]ifelse($#, 2, [ = $2],)
EOF
cat >> confdefs.h <<EOF
[#define] $1 ifelse($#, 2, [$2], 1)
EOF
}
])dnl AC_DEFINE_UNQUOTED

dnl redefine AC_CHECK_LIB in accordance with our own value of ac_link
dnl Add in extra kludgy check to support with_dnet=no
dnl Add in extra LDFLAGS arg, which PRECEDES libs
dnl Support --with-dnet=no

dnl AC_CHECK_LIB(LIBRARY, FUNCTION [, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND
dnl             [, OTHER-LIBRARIES] [, LDFLAGS]]]])
define([AC_CHECK_LIB],
[ifelse([$1],dnet, [if test "$with_dnet" = "no" ; then
ac_cv_lib_dnet_dnet_ntoa=no
ifelse([$4], , , [$4]
)dnl
else
])]
AC_CHECK_LIB_ORIG_HACKED([$1],[$2],[$3],[$4],[$5], [$6])
[ifelse([$1],dnet,[fi
])]dnl
)dnl AC_CHECK_LIB

define([AC_CHECK_LIB_ORIG_HACKED],
[ifelse([$5],,AC_MSG_CHECKING([for $2 in -l$1]),
xe_msg_checking="for [$2] in -l[$1]"
test -n "[$5]" && xe_msg_checking="$xe_msg_checking using extra libs [$5]"
AC_MSG_CHECKING("$xe_msg_checking"))
dnl Use a cache variable name containing both the library and function name,
dnl because the test really is for library $1 defining function $2, not
dnl just for library $1.  Separate tests with the same $1 and different $2s
dnl may have different results.
ac_lib_var=`echo $1['_']$2 | sed 'y%./+-%__p_%'`
AC_CACHE_VAL(ac_cv_lib_$ac_lib_var,
[xe_check_libs="$6 -l$1 $5"
AC_TRY_LINK(dnl
ifelse([$2], [main], , dnl Avoid conflicting decl of main.
[/* Override any gcc2 internal prototype to avoid an error.  */
]ifelse(AC_LANG, CPLUSPLUS, [#ifdef __cplusplus
extern "C"
#endif
])dnl
[/* We use char because int might match the return type of a gcc2
    builtin and then its argument prototype would still apply.  */
char $2();
]),
            [$2()],
            eval "ac_cv_lib_$ac_lib_var=yes",
            eval "ac_cv_lib_$ac_lib_var=no")
xe_check_libs=""
])dnl
if eval "test \"`echo '$ac_cv_lib_'$ac_lib_var`\" = yes" ; then
  AC_MSG_RESULT(yes)
  ifelse([$3], ,
[changequote(, )dnl
  ac_tr_lib=HAVE_LIB`echo $1 | sed -e 's/[^a-zA-Z0-9_]/_/g' \
    -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'`
changequote([, ])dnl
  AC_DEFINE_UNQUOTED($ac_tr_lib)
  XE_PREPEND([-l$1], LIBS)
], [$3])
else
  AC_MSG_RESULT(no)
ifelse([$4], , , [$4
])dnl
fi
])dnl AC_CHECK_LIB_ORIG_HACKED


dnl AC_LANG_C()
define([AC_LANG_C],
[define([AC_LANG], [C])dnl
ac_ext=c
dnl CFLAGS is not in ac_cpp because -g, -O, etc. are not valid cpp options.
dnl ac_cpp='$CPP $CPPFLAGS'
dnl ac_compile='${CC-cc} -c $CFLAGS $CPPFLAGS conftest.$ac_ext 1>&AC_FD_CC'
dnl ac_link='${CC-cc} -o conftest $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS 1>&AC_FD_CC'
xe_cppflags='$CPPFLAGS $c_switch_site $c_switch_machine $c_switch_system $c_switch_x_site $X_CFLAGS'
xe_ldflags='$LDFLAGS $ld_switch_site $ld_switch_machine $ld_switch_system $ld_switch_x_site $ld_switch_run'
xe_libs='$ld_call_shared $xe_check_libs $X_EXTRA_LIBS $libs_x $libs_gtk $X_PRE_LIBS $LIBS $libs_machine $libs_system $libs_standard'
ac_cpp='$CPP '"$xe_cppflags"
ac_compile='${CC-cc} -c $CFLAGS '"$xe_cppflags"' conftest.$ac_ext 1>&AC_FD_CC'
ac_link='${CC-cc} -o conftest $CFLAGS '"$xe_cppflags $xe_ldflags"' conftest.$ac_ext '"$xe_libs"' 1>&AC_FD_CC'
cross_compiling=no
]) dnl AC_LANG_C

dnl The construct foo=`echo $w1 $w2 $w3` fails on some systems if $w1 = -e or -n
dnl So we use the following instead.
dnl XE_SPACE(var, words)
define([XE_SPACE],[
T=""
for W in $2; do if test -z "$T"; then T="$W"; else T="$T $W"; fi; done
$1="$T"
])dnl XE_SPACE

dnl XE_ADD_OBJS(foo.o ...)
define([XE_ADD_OBJS],
[extra_objs="$extra_objs [$1]" && dnl
 if test "$extra_verbose" = "yes"; then
   echo "    xemacs will be linked with \"[$1]\""
 fi])dnl XE_ADD_OBJS

dnl XE_APPEND(value, varname)
define([XE_APPEND],
[[$2]="$[$2] [$1]" && dnl
 if test "$extra_verbose" = "yes"; then echo "    Appending \"[$1]\" to \$[$2]"; fi])

dnl XE_PREPEND(value, varname)
define([XE_PREPEND],
[[$2]="[$1] $[$2]" && dnl
 if test "$extra_verbose" = "yes"; then echo "    Prepending \"[$1]\" to \$[$2]"; fi])

dnl XE_DIE(message)
define([XE_DIE], [{ echo "Error:" $1 >&2; exit 1; }])

dnl XE_STRIP_4TH_COMPONENT(var)
dnl Changes i986-pc-linux-gnu to i986-pc-linux, as God (not RMS) intended.
define([XE_STRIP_4TH_COMPONENT],
[$1=`echo "$$1" | sed '[s/^\([^-][^-]*-[^-][^-]*-[^-][^-]*\)-.*$/\1/]'`])

dnl Initialize some variables set by options.
dnl The variables have the same names as the options, with
dnl dashes changed to underlines.

define([AC_INIT_PARSE_ARGS],[

dnl Get sane consistent behavior from various shells
dnl Avoid losing with weird user CDPATHs

if test -n "$ZSH_VERSION"; then
  dnl zsh's Bourne shell emulation options
  setopt NO_BAD_PATTERN NO_BANG_HIST NO_BG_NICE NO_EQUALS NO_FUNCTION_ARGZERO
  setopt GLOB_SUBST NO_HUP INTERACTIVE_COMMENTS KSH_ARRAYS NO_MULTIOS NO_NOMATCH
  setopt RM_STAR_SILENT POSIX_BUILTINS SH_FILE_EXPANSION SH_GLOB SH_OPTION_LETTERS
  setopt SH_WORD_SPLIT BSD_ECHO IGNORE_BRACES
  dnl zsh-3.1-beta drops core on the following
  dnl unset CDPATH
  if test -n "$CDPATH"; then CDPATH="."; export CDPATH; fi
elif test -n "$BASH_VERSION"; then
  dnl Use Posix mode with bash
  set -o posix
  unset CDPATH
else
  if test -n "$CDPATH"; then CDPATH="."; export CDPATH; fi
fi

dnl Initialize some variables set by options.
dnl The variables have the same names as the options, with
dnl dashes changed to underlines.
exec_prefix=NONE
host=NONE
no_create=
nonopt=NONE
no_recursion=
prefix=NONE
program_prefix=NONE
program_suffix=NONE
program_transform_name=s,x,x,
silent=
site=
srcdir=
target=NONE
verbose=
x_includes=NONE
x_libraries=NONE

dnl Initialize some other variables.
subdirs=
MFLAGS= MAKEFLAGS=
SHELL=${CONFIG_SHELL-/bin/sh}
dnl Maximum number of lines to put in a shell here document.
ac_max_here_lines=12
])dnl AC_INIT_PARSE_ARGS

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

dnl -----------------------------
dnl Establish some default values
dnl -----------------------------

XE_APPEND(lib-src, MAKE_SUBDIR)
XE_APPEND(lib-src, INSTALL_ARCH_DEP_SUBDIR)

prefix='/usr/local'
exec_prefix='${prefix}'
bindir='${exec_prefix}/bin'
dnl FSF 19.29 changes to:
dnl datadir='${prefix}/share'
dnl sharedstatedir='${prefix}/com'
dnl libexecdir='${exec_prefix}/libexec'
datadir='${prefix}/lib'
statedir='${prefix}/lib'
libdir='${exec_prefix}/lib'
mandir='${prefix}/man/man1'
inststaticdir='${PROGNAME}'
instvardir='${PROGNAME}-${version}'
infodir='${datadir}/${instvardir}/info'
infopath=''
install_pp=''
lispdir='${datadir}/${instvardir}/lisp'
moduledir='${libdir}/${instvardir}/${configuration}/modules'
sitelispdir='${datadir}/${inststaticdir}/site-lisp'
sitemoduledir='${libdir}/${inststaticdir}/site-modules'
pkgdir='${datadir}/${instvardir}/lisp'
package_path=''
etcdir='${datadir}/${instvardir}/etc'
archlibdir='${libdir}/${instvardir}/${configuration}'
docdir='${archlibdir}'
with_netinstall="no"
with_prefix='yes'
with_site_lisp='no'
with_site_modules='yes'
with_menubars=''
with_scrollbars=''
with_widgets=''
with_dialogs=''
with_file_coding=''
cpp='' cppflags='' libs='' ldflags=''
extra_includes=''
dynamic=''
with_x11=''
with_msw=''
rel_alloc='default'
with_system_malloc='default'
with_dlmalloc='default'
use_regex_malloc='yes'
dnl ESD is associated with crashes and lockups due to incorrect signal use.
with_esd_sound='no'
native_sound_lib=''
dnl These should be set to the empty string when we want gtk / gnome to
dnl be auto-detected instead of manually specified.
with_gtk='no'
with_gnome='no'
dnl use_assertions should be 'yes' by default.  Too many people in this
dnl world have core dumps turned off by default or \"cannot find where the
dnl core file went\".  At least we should get some useful output ...
use_assertions="yes"
dnl the following is set to yes or no later.
with_toolbars=""
with_tty=""
use_union_type="no"
with_dnet=""
dnl pdump now defaults by opsys
pdump=''
dnl dragndrop is still experimental.  When it is stable, comment out the following line:
with_dragndrop="no"
dnl Too annoying, even if mandated by IPv6 (and I'm not even sure of that)
with_ipv6_cname="no"

dnl ------------------
dnl Options Processing
dnl ------------------

define([USAGE_ERROR],
[(echo "$progname: Usage error:"
echo " " $1
echo "  Use \`$progname --help' to show usage.") >&2 && exit 1])

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

dnl Shell Magic: Quote the quoted arguments in ARGUMENTS.  At a later date,
dnl in order to get the arguments back in $@, we have to do an
dnl 'eval set x "$quoted_arguments"; shift'
dnl # We use sed to turn embedded ' into '"'"'.  I truly hate sh quoting.
quoted_sed_magic=s/"'"/"'"'"'"'"'"'"'"/g
quoted_arguments=
for i in "$@"; do
   case "$i" in
   -no-create | --no-create | --no-creat | --no-crea | --no-cre \
   | --no-cr | --no-c) ;;
   -no-recursion | --no-recursion | --no-recursio | --no-recursi \
   | --no-recurs | --no-recur | --no-recu | --no-rec | --no-re | --no-r) ;;
   *)
   quoted_i="`echo '' $i | sed -e 's:^ ::' -e $quoted_sed_magic`"
   quoted_arguments="$quoted_arguments '$quoted_i'" ;;
   esac
done

dnl Do not use shift -- that destroys the argument list, which autoconf needs
dnl to produce config.status.  It turns out that "set - $arguments" does not
dnl work portably.
dnl However, it also turns out that many shells cannot expand ${10} at all.
dnl So using an index variable does not work either.  It is possible to use
dnl some shell magic to make 'set x "$arguments"; shift' work portably.
while test $# != 0; do
  arg="$1"; shift
  case "$arg" in
    --no-create|--no-recursion) ;;
    dnl Anything starting with a hyphen we assume is an option.
    -* )
      dnl Separate the switch name from the value it is being given.
      case "$arg" in
        -*=*)
          opt=`echo '' $arg | sed -e 's:^ ::' -e 's:^-*\([[^=]]*\)=.*$:\1:'`
          val=`echo '' $arg | sed -e 's:^ ::' -e 's:^-*[[^=]]*=\(.*\)$:\1:'`
          valomitted=no
        ;;
           dnl special case these strings since echo may silently eat them:
           dnl --help ) opt=help val=yes valomitted=yes ;;
           dnl --version ) opt=version val=yes valomitted=yes ;;
           dnl -e ) opt=e val=yes valomitted=yes ;;
           dnl -E ) opt=E val=yes valomitted=yes ;;
           dnl -n ) opt=n val=yes valomitted=yes ;;
        -*)
           dnl If FOO is a boolean argument, --FOO is equivalent to
           dnl --FOO=yes.  Otherwise, the value comes from the next
           dnl argument - see below.
          opt=`echo '' $arg | sed -e 's:^ ::' -e 's:^-*\(.*\)$:\1:'`
          val="yes" valomitted=yes
        ;;
      esac

      dnl translate "-" in option string to "_"
      optname="$opt"
      opt="`echo '' $opt | sed -e 's:^ ::' | tr - _`"

      dnl Support --without-FOO as a synonym for --with-FOO=no
      case "${valomitted}-${opt}" in yes-without_* )
        opt=`echo $opt | sed 's/without/with/'`
        valomitted="no" val="no" ;;
      esac

      dnl Process the option.
      case "$opt" in

      dnl Process (many) boolean options
        with_site_lisp  | \
        with_prefix     | \
        with_site_modules | \
        with_x          | \
        with_x11        | \
        with_gtk        | \
        with_gnome      | \
        with_msw        | \
        with_gcc        | \
        dynamic         | \
        with_ncurses    | \
        with_dnet       | \
        with_socks      | \
        with_dragndrop  | \
        with_cde        | \
        with_offix      | \
        with_gpm        | \
        with_xpm        | \
        with_xface      | \
        with_gif        | \
        with_jpeg       | \
        with_png        | \
        with_tiff       | \
        with_wmcommand  | \
        with_xmu        | \
        with_purify     | \
        with_quantify   | \
        with_toolbars   | \
        with_tty        | \
        with_xfs        | \
        with_i18n3      | \
        with_mule       | \
        with_utf_2000   | \
        with_chise      | \
        with_text_coding| \
        with_file_coding| \
        with_canna      | \
        with_wnn        | \
        with_wnn6       | \
        with_workshop   | \
        with_sparcworks | \
        with_tooltalk   | \
        with_ldap       | \
        with_postgresql | \
        with_pop        | \
        with_kerberos   | \
        with_hesiod     | \
        with_dnet       | \
        with_infodock   | \
        with_netinstall | \
        with_ipv6_cname | \
        external_widget | \
        verbose         | \
        extra_verbose   | \
        usage_tracking  | \
        use_union_type  | \
        pdump           | \
        debug           | \
        use_assertions  | \
        use_regex_malloc | \
        memory_usage_stats | \
        with_clash_detection | \
        with_modules    | \
        quick_build )
          dnl Make sure the value given was either "yes" or "no".
          case "$val" in
            y | ye | yes )      val=yes ;;
            n | no )            val=no  ;;
            * ) USAGE_ERROR("The \`--$optname' option requires a boolean value: \`yes' or \`no'.") ;;
          esac
          eval "$opt=\"$val\"" ;;


        dnl Options that take a user-supplied value, as in --x-includes=/usr/X11R6/include
        dnl The cache-file option is ignored (for compatibility with other configures)
        srcdir          | \
        compiler        | \
        cflags          | \
        cpp             | \
        cppflags        | \
        libs            | \
        ldflags         | \
        cache_file      | \
        native_sound_lib| \
        site_lisp       | \
        x_includes      | \
        x_libraries     | \
        site_includes   | \
        site_libraries  | \
        site_prefixes   | \
        site_runtime_libraries )
          dnl If the value was omitted, get it from the next argument.
          if test "$valomitted" = "yes" ; then
            dnl Get the next argument from the argument list, if there is one.
            if test "$#" = 0 ; then
              USAGE_ERROR("The \`--$optname' option requires a value.");
            fi
            val="$1"; shift
          fi
          eval "$opt=\"$val\""
        ;;

        dnl Options that take "yes", "no", or "default" values
        rel_alloc | \
        with_dlmalloc | \
        with_debug_malloc  | use_debug_malloc | \
        with_system_malloc | use_system_malloc )
          case "$val" in
            y | ye | yes )      val=yes ;;
            n | no )            val=no  ;;
            d | de | def | defa | defau | defaul | default ) val=default ;;
            * ) USAGE_ERROR(["The \`--$optname' option requires one of these values:
  \`yes', \`no', or \`default'."]) ;;
          esac
          case "$opt" in use_* ) opt="`echo $opt | sed s/use/with/`" ;; esac
          eval "$opt=\"$val\""
        ;;

        dnl Has the user requested database support?
        "with_database" )
          with_database_berkdb=no
          with_database_dbm=no
          with_database_gdbm=no
          for x in `echo "$val" | sed -e 's/,/ /g'` ; do
            case "$x" in
              no ) ;;
              b | be | ber | berk | berkd | berkdb )       with_database_berkdb=yes ;;
              d | db | dbm )                               with_database_dbm=yes    ;;
              g | gn | gnu | gnud | gnudb | gnudbm | gdbm) with_database_gdbm=yes   ;;
              * ) USAGE_ERROR(["The \`--$optname' option value
  must be either \`no' or a comma-separated list
  of one or more of \`berkdb' and either \`dbm' or \`gnudbm'."]) ;;
            esac
          done
          if test "$with_database_dbm"  = "yes" -a \
                  "$with_database_gdbm" = "yes"; then
          USAGE_ERROR("Only one of \`dbm' and \`gnudbm' may be specified
  with the \`--$optname' option.")
          fi
        ;;

        dnl Has the user requested sound support?
        "with_sound" )
        dnl values is a subset of all,native,nas,esd
        dnl or their negatives: none,nonative,nonas,noesd
          for x in `echo "$val" | sed -e 's/,/ /g'` ; do
            case "$x" in
              dnl all and none are only permitted as the first in the list.
              n | no | non | none ) new_sdefault=no ;;
              a | al | all | both ) new_sdefault=yes ;;

              native )       with_native_sound=yes ;;
              nonative )     with_native_sound=no ;;

              nas )          with_nas_sound=yes ;;
              nonas )        with_nas_sound=no ;;

              esd )          with_esd_sound=yes ;;
              noesd )        with_esd_sound=no ;;

              * ) bogus_sound=yes ;;
            esac
            if test "$bogus_sound" -o \
                 \( -n "$new_sdefault" -a -n "$sound_notfirst" \) ; then
                types="\`all', \`none', \`(no)native', \`no(nas)', \`(no)esd'."
                USAGE_ERROR(["Valid types for the \`--$optname' option are:
  $types.
Option \`all' or \`none' must be first in the list.
The default is to autodetect native and NAS sound support."])
            elif test -n "$new_sdefault" ; then
                with_native_sound=$new_sdefault
                with_nas_sound=$new_sdefault
                with_esd_sound=$new_sdefault
                new_sdefault=   # reset this
            fi
            sound_notfirst=true
          done
        ;;

        dnl Has the user specified a preferred Athena widget set?
        dnl This bit expands any alias names out for us...
        "with_athena" )
          case "$val" in
            xa | xaw )                    val=xaw    ;;
            3 | 3d | xaw3d )              val=3d     ;;
            dnl No `n' for next, someone may try `no'
            ne | nex | next | naxtaw)     val=next   ;;
            dnl Have not tested the next two...
            9 | 95 | xaw95 )              val=95     ;;
            xp | xpm | xawxpm )           val=xpm    ;;
            * ) USAGE_ERROR(["The \`--$optname' option must have one of these values:
  \`xaw', \`3d', \`next', \`95', or \`xpm'."]) ;;
          esac
          eval "$opt=\"$val\""
        ;;

        dnl Has the user requested XIM support?
        "with_xim" )
          case "$val" in
            y | ye | yes )                val=yes   ;;
            n | no | non | none )         val=no    ;;
            x | xl | xli | xlib )         val=xlib  ;;
            m | mo | mot | moti | motif ) val=motif ;;
            * ) USAGE_ERROR(["The \`--$optname' option must have one of these values:
  \`motif', \`xlib', \`yes', or \`no'."]) ;;
          esac
          eval "$opt=\"$val\""
        ;;

        dnl Mail locking specification
        "mail_locking" )
          case "$val" in
            lockf )     val=lockf ;;
            flock )     val=flock ;;
            file | dot ) val=file  ;;
            locking )   val=locking  ;;
            * ) USAGE_ERROR(["The \`--$optname' option must have one of these values:
  \`lockf', \`flock', \`file', \`locking', or \`mmdf'."]) ;;
          esac
          eval "$opt=\"$val\""
        ;;

        dnl Has the user requested error-checking?
        "error_checking" )
          dnl value can be all, none, and/or a list of categories to check.
          dnl Example: --error-checking=all,noextents,nobufpos
          dnl Example: --error-checking=none,malloc,gc

          for x in `echo "$val" | sed -e 's/,/ /g'` ; do
            case "$x" in
              dnl all and none are only permitted as the first in the list.
              n | no | non | none ) new_default=no ;;
              a | al | all )        new_default=yes ;;

              extents )       error_check_extents=yes ;;
              noextents )     error_check_extents=no ;;

              typecheck )     error_check_typecheck=yes ;;
              notypecheck )   error_check_typecheck=no ;;

              bufpos )        error_check_bufpos=yes ;;
              nobufpos )      error_check_bufpos=no ;;

              gc )            error_check_gc=yes ;;
              nogc )          error_check_gc=no ;;

              malloc )        error_check_malloc=yes ;;
              nomalloc )      error_check_malloc=no ;;

              byte_code )     error_check_byte_code=yes ;;
              nobyte_code )   error_check_byte_code=no ;;

              glyphs )     error_check_glyphs=yes ;;
              noglyphs )   error_check_glyphs=no ;;

              * ) bogus_error_check=yes ;;
            esac
            if test "$bogus_error_check" -o \
                 \( -n "$new_default" -a -n "$echeck_notfirst" \) ; then
                if test "$error_check_default" = yes ; then
                  types="\`all' (default), \`none', \`noextents', \`notypecheck', \`nobufpos', \`nogc', \`nomalloc', \`noglyphs' and \`nobyte-code'."
                else
                  types="\`all', \`none' (default), \`extents', \`typecheck', \`bufpos', \`gc', \`malloc', \`glyphs' and \`byte-code'."
                fi
                USAGE_ERROR(["Valid types for the \`--$optname' option are:
  $types."])
            elif test -n "$new_default" ; then
                error_check_extents=$new_default
                error_check_typecheck=$new_default
                error_check_bufpos=$new_default
                error_check_gc=$new_default
                error_check_malloc=$new_default
                error_check_byte_code=$new_default
                error_check_glyphs=$new_default
                new_default=    # reset this
            fi
            echeck_notfirst=true
          done
        ;;

        dnl Has the user tried to tell us where the X files are?
        dnl I think these are dopey, but no less than three alpha
        dnl testers, at large sites, have said they have their X files
        dnl installed in odd places.

        dnl Has the user specified one of the path options?
        prefix | exec_prefix | bindir | datadir | statedir | libdir | \
        mandir | infodir | infopath | lispdir | etcdir | pkgdir | \
        archlibdir | docdir | package_path | moduledir )
           dnl If the value was omitted, get it from the next argument.
           if test "$valomitted" = "yes"; then
             if test "$#" = 0; then
                 USAGE_ERROR("The \`--$optname' option requires a value.");
             fi
             val="$1"; shift
           fi
           eval "$opt=\"$val\""

           dnl You need to synchronize this with the way the
           dnl default values are built.
           case "$opt" in
             dnl prefix is taken care of by --with-prefix
             exec_prefix ) AC_DEFINE(EXEC_PREFIX_USER_DEFINED) ;;
             lispdir ) AC_DEFINE(LISPDIR_USER_DEFINED) ;;
             sitelispdir ) AC_DEFINE(SITELISPDIR_USER_DEFINED) ;;
             moduledir ) AC_DEFINE(MODULEDIR_USER_DEFINED) ;;
             etcdir  )  AC_DEFINE(ETCDIR_USER_DEFINED) ;;
             infodir ) AC_DEFINE(INFODIR_USER_DEFINED) ;;
             infopath ) AC_DEFINE(INFOPATH_USER_DEFINED) ;;
             package_path ) AC_DEFINE(PACKAGE_PATH_USER_DEFINED) ;;
             datadir )
                AC_DEFINE(INFODIR_USER_DEFINED)
                AC_DEFINE(LISPDIR_USER_DEFINED)
                AC_DEFINE(MODULEDIR_USER_DEFINED)
                AC_DEFINE(ETCDIR_USER_DEFINED)
                AC_DEFINE(DOCDIR_USER_DEFINED)
                AC_DEFINE(ARCHLIBDIR_USER_DEFINED) ;;
             docdir ) AC_DEFINE(DOCDIR_USER_DEFINED) ;;
             exec_prefix | libdir | archlibdir ) AC_DEFINE(ARCHLIBDIR_USER_DEFINED) ;;
           esac
        ;;

        dnl --no-create added by autoconf for use by config.status
        "no_create" ) ;;

        dnl Has the user asked for some help?
        "usage" | "help" ) ${PAGER-more} ${srcdir}/configure.usage; exit 0 ;;

        dnl Has the user specified the toolkit(s) to use for GUI elements?
        "with_menubars"   | \
        "with_scrollbars" | \
        "with_dialogs"    | \
        "with_widgets" )
          case "$val" in
            l | lu | luc | luci | lucid )               val=lucid  ;;
            mo | mot | moti | motif )                   val=motif  ;;
            a | at | ath | athe | athen | athena )      val=athena ;;
            n | no | non | none )                       val=no     ;;
            y | ye | yes )                              val=yes    ;;
            dnl Explicit --with-widgets on command line means yes.
            "")                                         val=yes    ;;
            g | gt | gtk )                              val=gtk    ;;
            ms | msw )                                  val=msw    ;;
            * ) USAGE_ERROR(["The \`--$optname' option must have one of these values:
  \`gtk', \`lucid', \`motif', \`athena', \`yes', or \`no'."]) ;;
          esac
          eval "$opt=\"$val\""
        ;;

        dnl Obsolete legacy argument?  Warn, but otherwise ignore.
        "use_minimal_tagbits" | \
        "use_indexed_lrecord_implementation" | \
        "run_in_place"  | \
        "const_is_losing" | \
        "with_gnu_make" )
          AC_MSG_WARN([Obsolete option \`--$optname' ignored.])
        ;;

        dnl Unrecognized option?  No mercy for user errors.
        * ) USAGE_ERROR("Unrecognized option: $arg") ;;

      esac
    ;;

    dnl Assume anything with multiple hyphens is a configuration name.
    *-*-*) configuration="$arg" ;;

    dnl Unrecognized argument?  No mercy for user errors.
    *) USAGE_ERROR("Unrecognized argument: $arg") ;;

  esac
done

dnl -------------------------
dnl Finish options processing
dnl -------------------------

dnl Several options are equivalent to, and override, environment variables.
test -n "$cpp"      && CPP="$cpp"
test -n "$cppflags" && CPPFLAGS="$cppflags"
test -n "$libs"     && LIBS="$libs"
test -n "$ldflags"  && LDFLAGS="$ldflags"

dnl Get the arguments back.  See the diatribe on Shell Magic above.
eval set x "$quoted_arguments"; shift

dnl --extra-verbose implies --verbose
test "$extra_verbose" = "yes" && verbose=yes

dnl with_x is an obsolete synonym for with_x11
test -n "$with_x" && with_x11="$with_x"

dnl --with-quantify or --with-purify imply --use-system-malloc
if test "$with_purify" = "yes" -o "$with_quantify" = "yes"; then
  test "$with_system_malloc" = "default" && with_system_malloc=yes
fi

dnl XE_CHECK_FEATURE_DEPENDENCY(feature1, feature2)
define([XE_CHECK_FEATURE_DEPENDENCY],
[if test "$with_$1 $with_$2" = "yes no"; then
  USAGE_ERROR("--with-$1 requires --with-$2")
elif test "$with_$2" = "no" ; then with_$1=no
elif test "$with_$1" = "yes"; then with_$2=yes
fi
])

dnl CDE requires tooltalk
XE_CHECK_FEATURE_DEPENDENCY(cde, tooltalk)

dnl Find the source directory.
case "$srcdir" in

  dnl If srcdir is not specified, see if  "." or ".." might work.
  "" )
    for dir in "`echo $0 | sed 's|//|/|' | sed 's|/[[^/]]*$||'`" "." ".." ; do
      if test -f "$dir/src/lisp.h" -a \
              -f "$dir/lisp/version.el" ; then
        srcdir="$dir"
        break
      fi
    done
    if test -z "$srcdir" ; then
      USAGE_ERROR(["Neither the current directory nor its parent seem to
  contain the XEmacs sources.  If you do not want to build XEmacs in its
  source tree, you should run \`$progname' in the directory in which
  you wish to build XEmacs, using the \`--srcdir' option to say where the
  sources may be found."])
    fi
  ;;

  dnl Otherwise, check if the directory they specified is okay.
  * )
    if test ! -f "$srcdir/src/lisp.h" -o \
            ! -f "$srcdir/lisp/version.el" ; then
      USAGE_ERROR(["The directory specified with the \`--srcdir' option,
  \`$srcdir', doesn't seem to contain the XEmacs sources.  You should
  either run the \`$progname' script at the top of the XEmacs source
  tree, or use the \`--srcdir' option to specify the XEmacs source directory."])
    fi
  ;;
esac

dnl ###########################################################################
if test -z "$configuration"; then
  dnl Guess the configuration
  configuration=`${CONFIG_SHELL-/bin/sh} $srcdir/config.guess`
  if test -z "$configuration"; then
    USAGE_ERROR(["XEmacs has not been ported to this host type.
Try explicitly specifying the CONFIGURATION when rerunning configure."])
  fi
fi

AC_PROG_LN_S

dnl Make symlinks for etc, lisp, and info directories while the path
dnl is still relative.  We do not symlink lock because someone may
dnl have stuck the source on a read-only partition.  Instead we
dnl create it as an actual directory later on if it does not already
dnl exist.
for dir in lisp etc man info tests; do
  if test ! -d "$dir" ; then
    echo Making symbolic link to "$srcdir/$dir"
    ${LN_S} "$srcdir/$dir" "$dir"
  fi
done

dnl Do our best to deal with automounter brokenness
dnl CANONICALIZE_PATH(varname)
define([CANONICALIZE_PATH],
[if test -d "/net"; then
  if test -d "/tmp_mnt/net"; then tdir="tmp_mnt/net"; else tdir="tmp_mnt"; fi
  $1=`echo "[$]$1" | \
   sed -e "s|^${tdir}/|/net/|" -e "s|^/a/|/net/|" -e "s|^/amd/|/net/|"`
fi])dnl

dnl Calculate canonical name for blddir (i.e. current directory).
dnl PWD may already be the preferable absolute name for ".",
dnl but we can't trust it - it is sometimes inaccurate.
absolute_pwd="`pwd`";
if test -n "$PWD" -a "`cd $PWD && pwd`" = "$absolute_pwd"
then blddir="$PWD"
else blddir="$absolute_pwd"; CANONICALIZE_PATH(blddir)
fi
AC_SUBST(blddir)

dnl Make srcdir absolute, if not already.  It is important to
dnl avoid running the path through pwd unnecessary, since pwd can
dnl give you automounter prefixes, which can go away.
case "$srcdir" in
  /* ) ;;
  .  ) srcdir="$blddir" ;;
  *  ) srcdir="`cd $srcdir && pwd`"; CANONICALIZE_PATH(srcdir) ;;
esac

dnl Check if the source directory already has a configured system in it.
if test `pwd` != `sh -c cd $srcdir && pwd`  \
   && test -f "$srcdir/src/config.h"; then
  (echo "$progname: WARNING: The directory tree \`$srcdir' is being used"
   echo "   as a build directory right now; it has been configured in its own"
   echo "   right.  To configure in another directory as well, you MUST"
   echo "   use GNU make.  If you do not have GNU make, then you must"
   echo "   now do \`make distclean' in $srcdir,"
   echo "   and then run $progname again.") >&2
  extrasub='/^VPATH[[    ]]*=/c\
vpath %.c $(srcdir)\
vpath %.h $(srcdir)\
vpath %.y $(srcdir)\
vpath %.l $(srcdir)\
vpath %.s $(srcdir)\
vpath %.in $(srcdir)'
fi

dnl ----------------------------------------
dnl Find out which version of XEmacs this is
dnl ----------------------------------------
. "$srcdir/version.sh" || exit 1;
dnl Must do the following first to determine verbosity for AC_DEFINE
if test -n "$emacs_is_beta"; then beta=yes; else beta=no; fi
: "${extra_verbose=$beta}"
version="${emacs_major_version}.${emacs_minor_version}"
AC_DEFINE_UNQUOTED(EMACS_MAJOR_VERSION, $emacs_major_version)
AC_DEFINE_UNQUOTED(EMACS_MINOR_VERSION, $emacs_minor_version)
if test -n "$emacs_beta_version" ; then
  if test "$beta" = "yes"; then
        version="${version}-b${emacs_beta_version}"
        AC_DEFINE_UNQUOTED(EMACS_BETA_VERSION, $emacs_beta_version)
  else
        version="${version}.${emacs_beta_version}"
        AC_DEFINE_UNQUOTED(EMACS_PATCH_LEVEL, $emacs_beta_version)
  fi
fi
AC_DEFINE_UNQUOTED(XEMACS_CODENAME, "$xemacs_codename")
AC_DEFINE_UNQUOTED(EMACS_VERSION, "$version")

if test "$with_infodock" = "yes"; then
  if test ! -f ../../ID-INSTALL; then
    echo "Cannot build InfoDock without InfoDock sources"
    with_infodock=no
  fi
fi

if test "$with_infodock" = "yes"; then
  dnl InfoDock version numbers.  XEmacs will use the same style of numbering
  dnl after the release of XEmacs 21.0.
  AC_DEFINE_UNQUOTED(INFODOCK_MAJOR_VERSION, $infodock_major_version)
  AC_DEFINE_UNQUOTED(INFODOCK_MINOR_VERSION, $infodock_minor_version)
  AC_DEFINE_UNQUOTED(INFODOCK_BUILD_VERSION, $infodock_build_version)
  version=${infodock_major_version}.${infodock_minor_version}.${infodock_build_version}
  PROGNAME=infodock
  CPPFLAGS="$CPPFLAGS -DINFODOCK"
else
  PROGNAME=xemacs
fi

AC_DEFINE_UNQUOTED(EMACS_PROGNAME, "$PROGNAME")

dnl ----------------------------------
dnl Error checking and debugging flags
dnl ----------------------------------
dnl Error checking default to "yes" in beta versions, to "no" in releases.
dnl Same goes for --debug and --extra-verbosity.
if test -n "$emacs_is_beta"; then beta=yes; else beta=no; fi
test "${error_check_extents=$beta}"   = yes && AC_DEFINE(ERROR_CHECK_EXTENTS)
test "${error_check_typecheck=$beta}" = yes && AC_DEFINE(ERROR_CHECK_TYPECHECK)
test "${error_check_bufpos=$beta}"    = yes && AC_DEFINE(ERROR_CHECK_BUFPOS)
test "${error_check_gc=$beta}"        = yes && AC_DEFINE(ERROR_CHECK_GC)
test "${error_check_malloc=$beta}"    = yes && AC_DEFINE(ERROR_CHECK_MALLOC)
test "${error_check_byte_code=$beta}" = yes && AC_DEFINE(ERROR_CHECK_BYTE_CODE)
test "${error_check_glyphs=$beta}" = yes && AC_DEFINE(ERROR_CHECK_GLYPHS)
dnl debug=yes must be set when error checking is present.  This should be
dnl fixed up.
dnl debug implies other options
if test "${debug:=$beta}" = "yes"; then
  use_assertions=yes memory_usage_stats=yes
  XE_ADD_OBJS(debug.o)
  XE_ADD_OBJS(tests.o)
  AC_DEFINE(DEBUG_XEMACS)
fi
test "$use_assertions"     = "yes" && AC_DEFINE(USE_ASSERTIONS)
test "$memory_usage_stats" = "yes" && AC_DEFINE(MEMORY_USAGE_STATS)

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

dnl Canonicalize the configuration name.
AC_MSG_CHECKING("host system type")
dnl allow -workshop suffix on configuration name
internal_configuration=`echo $configuration | sed 's/-\(workshop\)//'`
canonical=`${CONFIG_SHELL-/bin/sh} $srcdir/config.sub "$internal_configuration"`
XE_STRIP_4TH_COMPONENT(configuration)
XE_STRIP_4TH_COMPONENT(canonical)
AC_MSG_RESULT($configuration)

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

dnl You would hope that you could choose an m/*.h file pretty much
dnl based on the machine portion of the configuration name, and an s-
dnl file based on the operating system portion.  However, it turns out
dnl that each m/*.h file is pretty manufacturer-specific - for
dnl example, apollo.h, hp9000s300.h, mega68k, news.h, and tad68k are
dnl all 68000 machines; mips.h, pmax.h, and news-risc are all MIPS
dnl machines.  So we basically have to have a special case for each
dnl configuration name.

dnl As far as handling version numbers on operating systems is
dnl concerned, make sure things will fail in a fixable way.  If
dnl /etc/MACHINES says nothing about version numbers, be
dnl prepared to handle anything reasonably.  If version numbers
dnl matter, be sure /etc/MACHINES says something about it.

dnl Eric Raymond says we should accept strings like "sysvr4" to mean
dnl "System V Release 4"; he writes, "The old convention encouraged"
dnl "confusion between `system' and `release' levels'."

machine='' opsys=''

dnl Straightforward machine determination
case "$canonical" in
  sparc-*-*        ) machine=sparc ;;
  alpha*-*-*       ) machine=alpha ;;
  vax-*-*          ) machine=vax ;;
  mips-dec-*       ) machine=pmax ;;
  mips-sgi-irix6*  ) machine=iris6d ;;
  mips-sgi-*       ) machine=iris4d ;;
  mips*-linux      ) machine=mips ;;
  romp-ibm-*       ) machine=ibmrt ;;
  rs6000-ibm-aix*  ) machine=ibmrs6000 ;;
  powerpc-ibm-aix* ) machine=ibmrs6000 ;;
  powerpc*-*       ) machine=powerpc ;;
  hppa-*-*         ) machine=hp800 ;;
  m88k-dg-*        ) machine=aviion ;;
  m68*-sony-*      ) machine=news ;;
  mips-sony-*      ) machine=news-risc ;;
  clipper-*        ) machine=clipper ;;
  arm*             ) machine=arm ;;
  ns32k-*          ) machine=ns32000 ;;
esac

dnl Straightforward OS determination
case "$canonical" in
  *-*-linux*    ) opsys=linux ;;
  *-*-netbsd*   ) opsys=netbsd ;;
  *-*-openbsd*  ) opsys=openbsd ;;
  *-*-nextstep* ) opsys=nextstep ;;
  *-*-vms       ) opsys=vms ;;

  dnl DEC OSF
  *-dec-osf1.3 | *-dec-osf2* ) opsys=decosf1-3 ;;
  *-dec-osf1.2 | *-dec-osf1* ) opsys=decosf1-2 ;;
  *-dec-osf3.[[2-9]]         ) opsys=decosf3-2 ;;
  *-dec-osf3*                ) opsys=decosf3-1 ;;
  *-dec-osf[[4-9]]*          ) opsys=decosf4-0 ;;

  dnl DEC Ultrix
  *-*-ultrix[[0-3]].* | *-*-ultrix4.0* ) opsys=bsd4-2 ;;
  *-*-ultrix4.[[12]]* ) opsys=bsd4-3 ;;
  *-*-ultrix* )         opsys=ultrix4-3 ;;

  dnl AIX
  *-*-aix3.1*     ) opsys=aix3-1   ;;
  *-*-aix3.2.5    ) opsys=aix3-2-5 ;;
  *-*-aix3*       ) opsys=aix3-2   ;;
  *-*-aix4.0*     ) opsys=aix4     ;;
  *-*-aix4.1*     ) opsys=aix4-1   ;;
  *-*-aix[[4-9]]* ) opsys=aix4-2   ;;

  dnl Other generic OSes
  *-gnu* )                      opsys=gnu    ;;
  *-*-bsd4.[[01]] )             opsys=bsd4-1 ;;
  *-*-bsd4.2 )                  opsys=bsd4-2 ;;
  *-*-bsd4.3 )                  opsys=bsd4-3 ;;
  *-*-aos4.2 )                  opsys=bsd4-2 ;;
  *-*-aos*   )                  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 ;;
  *-*-sysv4.1* | *-*-sysvr4.1* )opsys=usg5-4 NON_GNU_CPP=/usr/lib/cpp ;;
  *-*-sysv4.[[2-9]]* | *-sysvr4.[[2-9]]* )
        if test -z "$NON_GNU_CPP" ; then
          for prog in "/usr/ccs/lib/cpp" "/lib/cpp"; do
            if test -f "$prog"; then NON_GNU_CPP="$prog"; break; fi
          done
        fi
        opsys=usg5-4-2 ;;
    *-sysv4* | *-sysvr4* )      opsys=usg5-4 ;;
    *-*-mach_bsd4.3* )          opsys=mach-bsd4-3 ;;
esac

case "$canonical" in

  dnl NetBSD ports
  *-*-netbsd* )
    case "$canonical" in
      i[[3-9]]86-*-netbsd*) machine=intel386 ;;
      hp300-*-netbsd* | amiga-*-netbsd* | sun3-*-netbsd* | mac68k-*-netbsd* | da30-*-netbsd* | m68k-*-netbsd* )
                      dnl Yes, this is somewhat bogus.
                      machine=hp9000s300 ;;
      pc532-*-netbsd* | ns32k-*-netbsd* )  machine=ns32000 ;;
      pmax-*-netbsd*  | mips-*-netbsd*  )  machine=pmax ;;
    esac
  ;;

  dnl OpenBSD ports
  *-*-openbsd* )
    case "${canonical}" in
      i386-*-openbsd*)          machine=intel386 ;;
      m68k-*-openbsd*)          machine=hp9000s300 ;;
      mipsel-*-openbsd*)        machine=pmax ;;
     esac
   ;;

  dnl Acorn RISCiX:
  arm-acorn-riscix1.1* ) machine=acorn opsys=riscix1-1 ;;
  arm-acorn-riscix1.2* | arm-acorn-riscix ) machine=acorn opsys=riscix1-2 ;;

  dnl Alliant machines
  fx80-alliant-* ) machine=alliant4     opsys=bsd4-2 ;;
  i860-alliant-* ) machine=alliant-2800 opsys=bsd4-3 ;;

  dnl Altos 3068
  m68*-altos-sysv* ) machine=altos opsys=usg5-2 ;;

  dnl Amdahl UTS
  580-amdahl-sysv* ) machine=amdahl opsys=usg5-2-2 ;;

  dnl Apollo, Domain/OS
  m68*-apollo-* ) machine=apollo opsys=bsd4-3 ;;

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

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

  dnl Bull machines
  rs6000-bull-bosx* ) machine=ibmrs6000 opsys=aix3-2 ;; # dpx20
  m68*-bull-sysv3*  ) machine=dpx2      opsys=usg5-3 ;; # dpx2
  m68*-bull-sysv2*  ) machine=sps7      opsys=usg5-2 ;; # sps7

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

  dnl Celerity
  celerity-celerity-bsd* ) machine=celerity opsys=bsd4-2 ;;

  dnl Convex
  *-convex-bsd* | *-convex-convexos* )
    machine=convex opsys=bsd4-3
    NON_GNU_CPP="cc -E -P"
  ;;

  dnl Cubix QBx/386
  i[[3-9]]86-cubix-sysv* ) machine=intel386 opsys=usg5-3 ;;

  dnl Darwin, a.k.a. MacOS X (based on Mach and Freebsd)
  *-*-darwin*)
    opsys=darwin
    RANLIB="ranlib -c" dnl Avoids a link error with lwlib-config.c
    ;;

  dnl Data General AViiON Machines
  i586-dg-dgux*R4*   | i586-dg-dgux5.4.4* ) machine=aviion opsys=dgux5-4r4 ;;
  m88k-dg-dgux5.4R3* | m88k-dg-dgux5.4.3* ) opsys=dgux5-4r3 ;;
  m88k-dg-dgux5.4R2* | m88k-dg-dgux5.4.2* ) opsys=dgux5-4r2 ;;
  m88k-dg-dgux*                           ) opsys=dgux     ;;

  dnl Motorola Delta machines
  m68k-motorola-sysv* | m68000-motorola-sysv* ) machine=delta opsys=usg5-3 ;;
  m88k-motorola-sysv4* )
    dnl jbotte@bnr.ca says that UNIX_System_V <hostName> 4.0 R40V4.3 m88k mc88110
    dnl needs POSIX_SIGNALS and therefore needs usg5-4-2.
    dnl I hope there are not other 4.0 versions for this machine
    dnl which really need usg5-4 instead.
    machine=delta88k opsys=usg5-4-2
  ;;
  m88k-motorola-sysv* | m88k-motorola-m88kbcs* ) machine=delta88k opsys=usg5-3 ;;

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

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

  dnl 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 ;;

  dnl Harris Night Hawk machines running CX/UX (a 5000 looks just like a 4000
  dnl as far as XEmacs is concerned).
  m88k-harris-cxux* )
    dnl Build needs to be different on 7.0 and later releases
    case "`uname -r`" in
       [[56]].[[0-9]] ) machine=nh4000 opsys=cxux  ;;
       [[7]].[[0-9]]  ) machine=nh4000 opsys=cxux7 ;;
    esac
    NON_GNU_CPP="/lib/cpp"
  ;;
  dnl Harris ecx or gcx running CX/UX (Series 1200, Series 3000)
  m68k-harris-cxux* ) machine=nh3000 opsys=cxux ;;
  dnl Harris power pc NightHawk running Power UNIX (Series 6000)
  powerpc-harris-powerunix ) machine=nh6000 opsys=powerunix NON_GNU_CPP="cc -Xo -E -P" ;;

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

  dnl HP 9000 series 200 or 300
  m68*-hp-bsd* ) machine=hp9000s300 opsys=bsd4-3 ;;

  dnl HP-UX
  *-hp-hpux* )
    dnl Figure out machine and opsys orthogonally
    case "$canonical" in
      m68*  ) machine=hp9000s300 ;;
      hppa* ) machine=hp800      ;;
    esac

    case "$canonical" in
      *-hp-hpux7*  )  opsys=hpux   ;;
      *-hp-hpux8*  )  opsys=hpux8  ;;
      *-hp-hpux9*  )  opsys=hpux9  ;;
      *-hp-hpux10* )  opsys=hpux10 ;;
      *-hp-hpux11* )  opsys=hpux11 ;;
      *            )  opsys=hpux   ;;
    esac

    dnl HP has a broken "strcat"
    case "$opsys" in hpux9 | hpux10 ) XE_ADD_OBJS(strcat.o) ;; esac

    if test "$opsys" = "hpux10" -o "$opsys" = "hpux11"; then \
        ansi_flag="-Ae"; else ansi_flag="-Aa"; fi
    NON_GNU_CC="cc $ansi_flag" NON_GNU_CPP="cc $ansi_flag -E"

    case "$canonical" in *-hp-hpux*shr* ) opsys="${opsys}-shr" ;; esac
  ;;

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

  dnl IBM machines
  i[[3-9]]86-ibm-aix1.1* ) machine=ibmps2-aix opsys=usg5-2-2 ;;
  i[[3-9]]86-ibm-aix1.[[23]]* | i[[3-9]]86-ibm-aix* ) machine=ibmps2-aix opsys=usg5-3 ;;
  i370-ibm-aix*) machine=ibm370aix opsys=usg5-3 ;;
  romp-ibm-aos*    ) opsys=bsd4-3 ;;
  romp-ibm-bsd*    ) opsys=bsd4-3 ;;
  romp-ibm-mach*   ) opsys=mach-bsd4-3 ;;

  dnl Integrated Solutions "Optimum V"
  m68*-isi-bsd4.2* ) machine=isi-ov opsys=bsd4-2 ;;
  m68*-isi-bsd4.3* ) machine=isi-ov opsys=bsd4-3 ;;

  dnl Intel 386 machines where we do care about the manufacturer
  i[[3-9]]86-intsys-sysv* ) machine=is386 opsys=usg5-2-2 ;;

  dnl Prime EXL
  i[[3-9]]86-prime-sysv* ) machine=i386 opsys=usg5-3 ;;

  dnl Sequent Symmetry running Dynix
  i[[3-9]]86-sequent-bsd* ) machine=symmetry opsys=bsd4-3 ;;

  dnl Sequent Symmetry running DYNIX/ptx
  i[[3-9]]86-sequent-ptx* ) machine=sequent-ptx opsys=ptx NON_GNU_CPP="/lib/cpp" ;;

  dnl Unspecified sysv on an ncr machine defaults to svr4.2.
  dnl (Plain usg5-4 does not turn on POSIX signals, which we need.)
  i[[3-9]]86-ncr-sysv* ) machine=ncr386 opsys=usg5-4-2 ;;

  dnl Intel Paragon OSF/1
  i860-intel-osf1* ) machine=paragon opsys=osf1 NON_GNU_CPP=/usr/mach/lib/cpp ;;

  dnl Intel 860
  i860-*-sysv4* ) machine=i860 opsys=usg5-4 NON_GNU_CC="/bin/cc" NON_GNU_CPP="/usr/ccs/lib/cpp" ;;

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

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

  dnl Workstations sold by MIPS
  dnl This is not necessarily all workstations using the MIPS processor -
  dnl Irises are produced by SGI, and DECstations by DEC.
  mips-mips-usg* ) machine=mips4 ;;
  mips-mips-riscos4 )
    machine=mips4
    NON_GNU_CC="cc -systype bsd43"
    NON_GNU_CPP="cc -systype bsd43 -E"
    case "$canonical" in
      mips-mips-riscos4* ) opsys=bsd4-3  ;;
      mips-mips-riscos5* ) opsys=riscos5 ;;
    esac
  ;;
  mips-mips-bsd* ) machine=mips opsys=bsd4-3 ;;
  mips-mips-*    ) machine=mips opsys=usg5-2-2 ;;

  dnl NeXT
  m68*-next-* | m68k-*-nextstep* ) machine=m68k opsys=nextstep ;;

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

  dnl 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 ;;

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

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

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

  dnl Pyramid machines
  pyramid-pyramid-bsd* ) machine=pyramid opsys=bsd4-2 ;;

  dnl Sequent Balance
  ns32k-sequent-bsd4.2* ) machine=sequent opsys=bsd4-2 ;;
  ns32k-sequent-bsd4.3* ) machine=sequent opsys=bsd4-3 ;;

  dnl Siemens Nixdorf
  mips-siemens-sysv* | mips-sni-sysv*)
    machine=mips-siemens opsys=usg5-4
    NON_GNU_CC=/usr/ccs/bin/cc
    NON_GNU_CPP=/usr/ccs/lib/cpp
  ;;

  dnl NEC
  mips-nec-sysv*)
    machine=mips-nec
    NON_GNU_CC=/usr/ccs/bin/cc
    NON_GNU_CPP=/usr/ccs/lib/cpp
  ;;

  dnl Silicon Graphics machines
  dnl 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 ;;
  dnl Iris 4D
  mips-sgi-irix3.*    ) opsys=irix3-3 ;;
  mips-sgi-irix4.*    ) opsys=irix4-0 ;;
  mips-sgi-irix6*     ) opsys=irix6-0 ;;
  mips-sgi-irix5.1*   ) opsys=irix5-1 ;;
  mips-sgi-irix5.2*   ) opsys=irix5-2 ;;
  mips-sgi-irix5.*    ) opsys=irix5-3 ;;
  mips-sgi-irix*      ) opsys=irix5-0 ;;

  dnl SONY machines
  *-sony-newsos[[34]]* | *-sony-news[[34]]* ) opsys=bsd4-3 ;;
  *-sony-news* ) opsys=newsos5 ;;

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

  dnl Suns
  *-*-solaris* | *-*-sunos* | *-sun-mach* | *-sun-bsd* )
    dnl Hardware type
    case "$canonical" in
      m68*-sunos1* )             machine=sun1     ;;
      m68*-sunos2* )             machine=sun2     ;;
      m68* )                     machine=sun3     ;;
      i*86*-sun-sunos[[34]]* )   machine=sun386   ;;
      i*86-*-* )                 machine=intel386 ;;
      rs6000* )                  machine=rs6000   ;;
    esac

    dnl Make $canonical even more so.
    case "$canonical" in *-sunos5*)
      canonical=`echo $canonical | sed -e s/sunos5/solaris2/`;;
    esac

    dnl On SunOS 4, use /usr/lib/cpp, sans dynodump, /bin/ranlib
    dnl On SunOS 5, use cc -E,        need dynodump, RANLIB not needed
    dnl But, SunOS 5.6 no longer needs dynodump because it has a similar
    dnl function integrated.
    case "$canonical" in
      *-sunos4* )
        #test -f /usr/lib/cpp     && NON_GNU_CPP=/usr/lib/cpp ;;
        : ;;
      *-solaris2* )
        #test -f /usr/ccs/lib/cpp && NON_GNU_CPP=/usr/ccs/lib/cpp
        RANLIB=':' ;;
    esac

    case "$canonical" in
      *-solaris*          )
        opsys=sol2
        os_release=`uname -r | sed -e 's/^\([[0-9]]\)\.\([[0-9]]\).*/\1\2/'`
        AC_DEFINE_UNQUOTED(OS_RELEASE, $os_release) ;;

      dnl The last Sun386 ran 4.0.
      i*86-*-sunos4*      ) opsys=sunos4-0      ;;
      *-sunos4.0*         ) opsys=sunos4-0      ;;
      *-sunos4.1.2*       ) opsys=sunos4-1-2    ;;
      *-sunos4.1.3*       ) opsys=sunos4-1-3    ;;
      *-sunos4.1.[[4-9]]* ) opsys=sunos4-1-4    ;;
      *-sunos4* | *-sunos ) opsys=sunos4-1      ;;
      *-mach*             ) opsys=mach-bsd4-3   ;;
      *                   ) opsys=bsd4-2        ;;
    esac

    case "$canonical" in *-sunos4*shr* ) opsys="${opsys}-shr" ;; esac

    dnl Watch out for a compiler guaranteed not to work.
    test "$opsys $CC" = "sol2 /usr/ucb/cc" && CC=""
  ;;

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

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

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

  dnl Tektronix XD88
  m88k-tektronix-sysv3* ) machine=tekxd88 opsys=usg5-3 ;;

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

  dnl Titan P2 or P3
  titan-titan-sysv* ) machine=titan opsys=usg5-3 ;;

  dnl Ustation E30 (SS5E)
  m68*-unisys-uniplus* ) machine=ustation opsystem=unipl5-2 ;;

  dnl Vaxen.
  vax-dec-* )
    case "$canonical" in
      *-sysv[[01]]* | *-sysvr[[01]]* )  opsys=usg5-0 ;;
      *-sysv2* | *-sysvr2* )            opsys=usg5-2 ;;
      *-mach* )                         opsys=mach-bsd4-3 ;;
    esac
  ;;

  dnl Whitechapel MG1
  ns16k-whitechapel-* ) machine=mg1 ;;

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

  dnl Intel 386 machines where we do not care about the manufacturer
  i[[3-9]]86-*-* )
    machine=intel386
    case "$canonical" in
      *-isc1.* | *-isc2.[[01]]* ) opsys=386-ix ;;
      *-isc2.2* )               opsys=isc2-2 ;;
      *-isc4.0* )               opsys=isc4-0 ;;
      *-isc4.* )                opsys=isc4-1
                                GCC_TEST_OPTIONS=-posix
                                NON_GCC_TEST_OPTIONS=-Xp
                                ;;
      *-isc* )                  opsys=isc3-0 ;;
      *-esix5* )                opsys=esix5r4 NON_GNU_CPP=/usr/lib/cpp ;;
      *-esix* )                 opsys=esix ;;
      *-mach* )                 opsys=mach-bsd4-3 ;;
      *-xenix* )                opsys=xenix ;;
      *-sco3.2v4* )             opsys=sco4 NON_GNU_CPP=/lib/cpp  ;;
      *-bsd386* | *-bsdi1* )    opsys=bsd386 ;;
      *-bsdi4* )                opsys=bsdos4 ;;
      *-bsdi3* )                opsys=bsdos3 ;;
      *-bsdi2.1* )              opsys=bsdos2-1 ;;
      *-bsdi2* )                opsys=bsdos2 ;;
      *-sco3.2v5* )             opsys=sco5 ;;
      *-sysv5* )                opsys=sco7 ;;
      *-386bsd* )               opsys=386bsd ;;
      *-freebsd* )              opsys=freebsd ;;
      *-nextstep* )             opsys=nextstep ;;
      *-pc-cygwin* )            opsys=cygwin32 ;;
      *-pc-mingw* )             opsys=mingw32 ;
                                test -z "$with_tty" && with_tty="no";;
      dnl Otherwise, we fall through to the generic opsys code at the bottom.
    esac
  ;;

  dnl Linux/68k
  m68k-*-linux* ) machine=m68k opsys=linux ;;

esac

dnl Initialize machine from $canonical if not in our database above.
test -z "$machine" && machine=`echo $canonical | sed 's/-.*$//'`

dnl Initialize opsys from `uname -s` if not in our database above.
test -z "$opsys"   && opsys=`uname -s | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz`

dnl Use configure-time autodetection if s&m not available
if test -r "${srcdir}/src/m/${machine}.h"; then
  machfile="m/${machine}.h"
  AC_DEFINE_UNQUOTED(config_machfile, "$machfile")
else
  echo "XEmacs has no builtin knowledge of \`$machine' machines."
  echo "Using configure-time autodetection only."
fi

if test -r "${srcdir}/src/s/${opsys}.h"; then
  opsysfile="s/${opsys}.h"
  AC_DEFINE_UNQUOTED(config_opsysfile, "$opsysfile")
else
  echo "XEmacs has no builtin knowledge of \`$opsys' operating systems."
  echo "Using configure-time autodetection only."
fi

dnl --------------------------------------------------------------
dnl $opsys detection complete; defaults depending on $opsys follow
dnl --------------------------------------------------------------

if test -z "$pdump"; then
  case "$opsys" in
    linux* )  pdump=yes ;;    dnl glibc 2.3.1 seems to hose unexec
    darwin )  pdump=yes ;;    dnl No "native" working dumper available
    *)        pdump=no ;;
  esac
fi

if test -z "$dynamic"; then
  case "$opsys" in
    hpux* | sunos4* ) dynamic=no ;;
    *) dynamic=yes ;;
  esac
fi
if test "$dynamic" = "yes"; then
  case "$opsys" in
    hpux* | sunos4* | sco5 ) opsys="${opsys}-shr" ;;
    decosf* ) ld_call_shared="-call_shared" ;;
    darwin ) AC_DEFINE(DLSYM_NEEDS_UNDERSCORE) ;;
  esac
else dnl "$dynamic" = "no"
  case "$opsys" in
    sol2 )
      echo "Static linking is not supported on Solaris 2."
      echo "Rerun configure without specifying --dynamic=no."
      exit 1 ;;
    linux   ) ld_call_shared="-Bstatic" ;;
    decosf* ) ld_call_shared="-non_shared" ;;
  esac
fi

dnl Use xlc by default on AIX
case "$opsys" in aix*) NON_GNU_CC=xlc ;; esac

stack_trace_eye_catcher=`echo ${PROGNAME}_${version}_${canonical} | sed 'y/.-/__/'`
AC_DEFINE_UNQUOTED(STACK_TRACE_EYE_CATCHER, $stack_trace_eye_catcher)

dnl --------------------------------------------------
dnl Determine the compiler, set up for feature testing
dnl --------------------------------------------------

dnl Sun Development environment support
test "$with_sparcworks" = "yes" && with_workshop=yes # compatibility alias
XE_CHECK_FEATURE_DEPENDENCY(workshop, tooltalk)
if test "$with_workshop" = "yes"; then
  AC_DEFINE(SUNPRO)
  XE_ADD_OBJS(sunpro.o)
fi

if test "$with_clash_detection" != "no"; then
  AC_DEFINE(CLASH_DETECTION)
  XE_ADD_OBJS(filelock.o)
fi

dnl Choose a compiler from (in order)
dnl --compiler, env var CC, with_gcc=no && ${NON_GNU_CC:-cc}, AC_PROG_CC
test -n "$compiler" && CC="$compiler"
if test "$with_gcc" = "no"; then dnl Try to find a non-gcc compiler
  case "$CC" in "" | *gcc* ) CC="${NON_GNU_CC-cc}" ;; esac
fi

dnl If we don't set CFLAGS here, AC_PROG_CC will set it.
dnl But we know better what's good for us, so we do our own
dnl computation of real CFLAGS later.
dnl --cflags overrides environment variable CFLAGS
test "${cflags-unset}" != unset && CFLAGS="$cflags"
if test "${CFLAGS-unset}" != unset
  then cflags_specified=yes;
  else cflags_specified=no;
fi

xe_save_CFLAGS="$CFLAGS"

AC_PROG_CC dnl Autoconf has its own magic for compiler autodetection

dnl Retry using random guesswork if AC_PROG_CC got it wrong...
if   test "$with_gcc" = "no"  -a "$GCC" = "yes"; then
  CC=${NON_GNU_CC-cc}
  AC_PROG_CC
elif test "$with_gcc" = "yes" -a "$GCC" != "yes" ; then
  CC=gcc
  AC_PROG_CC
fi
CFLAGS="$xe_save_CFLAGS"

dnl Figure out what C preprocessor to use.

dnl On Sun systems, people sometimes set up the variable CPP
dnl with a value that is a directory, not an executable at all.
dnl Detect that case, and ignore that value.
test -n "$CPP" -a -d "$CPP" && CPP=

test -n "$NON_GNU_CPP" -a "$GCC" != "yes" -a -z "$CPP" && CPP="$NON_GNU_CPP"

AC_PROG_CPP

dnl --------------------------------------------------------------------
dnl Compiler feature macros
dnl --------------------------------------------------------------------

AC_AIX dnl Defines _ALL_SOURCE on AIX.

dnl We want feature macros defined here *and* in config.h.in, so that
dnl the compilation environment at configure time and compile time agree.

AC_MSG_CHECKING(for GNU libc)
AC_TRY_COMPILE([#include <features.h>],[
#if ! (defined __GLIBC__ || defined __GNU_LIBRARY__)
#error Not a GNU libc system :-(
******* ======= ******** &&&&&&&&
#endif
], have_glibc=yes, have_glibc=no)
AC_MSG_RESULT($have_glibc)
dnl I'm tired of pop being broken with GLIBC -slb
dnl Well. then why not fix fucking pop?
test "$have_glibc" = "yes" && AC_DEFINE(_GNU_SOURCE)

dnl We'd like to use vendor extensions, where available.
dnl We'd like to use functions from the latest Unix98 standards.
dnl See http://www.opengroup.org/onlinepubs/007908799/xsh/compilation.html
case "$opsys" in
  sol2)
   AC_DEFINE(__EXTENSIONS__)
   dnl Solaris 2 before 2.5 had some bugs with feature test macro interaction.
   if test "$os_release" -ge 55; then
     AC_DEFINE(_XOPEN_SOURCE,500)
     AC_DEFINE(_XOPEN_SOURCE_EXTENDED)
   fi ;;
  linux)
    AC_DEFINE(_POSIX_C_SOURCE,199506L)
    AC_DEFINE(_XOPEN_SOURCE,500)
    AC_DEFINE(_XOPEN_SOURCE_EXTENDED)
    ;;
esac

dnl Identify compilers to enable compiler-specific hacks.
dnl Add support for other compilers HERE!
dnl GCC is already identified elsewhere.
AC_TRY_RUN([int main () {
#if defined __SUNPRO_C
return 11;
#elif defined __DECC
return 12;
#elif defined __USLC__ && defined __SCO_VERSION__
return 13;
#else
return 0;
#endif
}], [],
[case "$conftest_rc" in
  11) echo "You appear to be using the SunPro C compiler."; __SUNPRO_C=yes ;;
  12) echo "You appear to be using the DEC C compiler."   ; __DECC=yes ;;
  13) echo "You appear to be using the SCO C compiler."   ; __USLC__=yes ;;
esac])


dnl case "$canonical" in
dnl   *-sun-sunos* ) test "$CPP" = "acc -E" && CPP="acc -E -Xs" ;;
dnl esac

dnl --------------------------------------------------------------------
dnl Extract some information from the operating system and machine files
dnl --------------------------------------------------------------------

echo "Extracting information from the machine- and system-dependent headers..."

dnl It is not important that this name contain the PID; you cannot run
dnl two configures in the same directory and have anything work
dnl anyway.
tempcname="conftest.c"

dnl CPP_to_sh(CPP_SYMBOL, SH_VAR, DEFAULT_VALUE)
define([CPP_to_sh],
[[#]ifndef [$1]
[#]define [$1]ifelse([$3],,, [ "$3"])
[#]endif
configure___ [$2]=[$1]
])dnl CPP_to_sh

dnl CPP_boolean_to_sh(CPP_SYMBOL, SH_VAR)
define([CPP_boolean_to_sh],
[[#]ifdef [$1]
configure___ [$2]=yes
[#]else
configure___ [$2]=no
[#]endif
])dnl CPP_boolean_to_sh

cat > $tempcname < confdefs.h
cat >> $tempcname <<EOF
#define NOT_C_CODE
#define C_SWITCH_SITE
#define C_SWITCH_X_SITE
#define LD_SWITCH_SITE
#define LD_SWITCH_X_SITE
#define LD_SWITCH_X_SITE_AUX
#define OS_RELEASE $os_release

#ifdef config_opsysfile
#include "$srcdir/src/$opsysfile"
#endif

#ifdef config_machfile
#include "$srcdir/src/$machfile"
#endif

CPP_to_sh(LIBS_MACHINE, libs_machine)
CPP_to_sh(LIBS_SYSTEM,  libs_system)
CPP_to_sh(LIBS_TERMCAP, libs_termcap)
CPP_to_sh(LIB_STANDARD, libs_standard)

CPP_to_sh(OBJECTS_MACHINE, objects_machine)
CPP_to_sh(OBJECTS_SYSTEM,  objects_system)

CPP_to_sh(C_SWITCH_MACHINE,   c_switch_machine)
CPP_to_sh(C_SWITCH_SYSTEM,    c_switch_system)

CPP_to_sh(LD_SWITCH_MACHINE,  ld_switch_machine)
CPP_to_sh(LD_SWITCH_SYSTEM,   ld_switch_system)

CPP_to_sh(UNEXEC, unexec, unexec.o)

CPP_to_sh(LD_SWITCH_SHARED, ld_switch_shared, -c)

#define ORDINARY_LD "\$(CC) \$(CFLAGS)"
configure___ ordinary_ld=ORDINARY_LD

#ifdef ORDINARY_LINK
#define LD ORDINARY_LD
#else /* no ORDINARY LINK */
#ifdef COFF_ENCAPSULATE
#define LD "\$(CC) -nostdlib"
#else /* not COFF_ENCAPSULATE */
#ifdef LINKER
#define LD LINKER
#else /* ! defined (LINKER) */
#define LD "ld"
#endif /* ! defined (LINKER) */
#endif /* ! defined (COFF_ENCAPSULATE) */
#endif /* not ORDINARY_LINK */
configure___ ld=LD

CPP_to_sh(LIB_GCC, lib_gcc)
CPP_to_sh(LD_TEXT_START_ADDR, ld_text_start_addr)

#if ! defined (ORDINARY_LINK) && !defined (START_FILES)
#ifdef NO_REMAP
#ifdef COFF_ENCAPSULATE
#define START_FILES "pre-crt0.o /usr/local/lib/gcc-crt0.o"
#else /* ! defined (COFF_ENCAPSULATE) */
#define START_FILES "pre-crt0.o /lib/crt0.o"
#endif /* ! defined (COFF_ENCAPSULATE) */
#else /* ! defined (NO_REMAP) */
#define START_FILES "ecrt0.o"
#endif /* ! defined (NO_REMAP) */
#endif /* no ORDINARY_LINK */
#ifndef START_FILES
#define START_FILES
#endif
configure___ start_files=START_FILES

CPP_boolean_to_sh(ORDINARY_LINK, ordinary_link)
CPP_boolean_to_sh(SYSTEM_MALLOC, system_malloc)
CPP_boolean_to_sh(TERMINFO, have_terminfo)
dnl The MAIL_USE_xxx variables come from the s&m headers
CPP_boolean_to_sh(MAIL_USE_FLOCK, mail_use_flock)
CPP_boolean_to_sh(MAIL_USE_LOCKF, mail_use_lockf)
CPP_boolean_to_sh(MAIL_USE_LOCKING, mail_use_locking)
CPP_boolean_to_sh(HAVE_WIN32_PROCESSES, win32_processes)
EOF

dnl The value of CPP is a quoted variable reference, so we need to do this
dnl to get its actual value...
CPP=`eval "echo $CPP $CPPFLAGS"`
define(TAB, [   ])dnl
changequote(, )dnl
eval `$CPP -Isrc $tempcname \
        | sed -n -e "s/[ TAB]*=[ TAB\"]*/='/" -e "s/[ TAB\"]*\$/'/" -e "s/^configure___//p"`
changequote([, ])dnl

rm $tempcname

if test "$pdump" = "yes"; then
  ordinary_link="yes"
  ld="${ordinary_ld}"
  start_files=
  libs_standard=
  unexec=
  lib_gcc=
fi

dnl For debugging...
test "$extra_verbose" = "yes" && \
  PRINT_VAR(libs_machine libs_system libs_termcap libs_standard
  objects_machine objects_system c_switch_machine c_switch_system
  ld_switch_machine ld_switch_system unexec ld_switch_shared
  ld lib_gcc ld_text_start_addr start_files ordinary_link
  have_terminfo mail_use_flock mail_use_lockf) && echo ""

dnl Pick up mingw include path
dnl We only cope with headers in mingw, not mingw32: no previous version of
dnl XEmacs supported mingw and cygnus have made this incompatible change
dnl so we just go with the flow.
case "$opsys" in mingw* | cygwin*)
  cygwin_include=`eval "gcc -print-file-name=libc.a"` ;
  cygwin_include=`eval "dirname $cygwin_include"` ;
  cygwin_include="-I$cygwin_include/../include" ;
  extra_includes="$cygwin_include/mingw $cygwin_include" ;
  case "$opsys" in mingw*)
    XE_APPEND($extra_includes, c_switch_system) ;;
  esac
  ;;
esac

dnl Non-ordinary link usually requires -lc
test "$ordinary_link" = "no" -a -z "$libs_standard" && libs_standard="-lc"

dnl -----------------------
dnl Compiler-specific hacks
dnl -----------------------

dnl DEC C `-std1' means ANSI C mode
test "$__DECC" = "yes" && XE_APPEND(-std1, c_switch_site)

dnl Some versions of SCO native compiler need -Kalloca
if test "$__USLC__" = yes; then
  AC_MSG_CHECKING(for whether the -Kalloca compiler flag is needed)
  need_kalloca=no
  AC_TRY_LINK([], [void *x = alloca(4);], [:], [
    xe_save_c_switch_system="$c_switch_system"
    c_switch_system="$c_switch_system -Kalloca"
    AC_TRY_LINK([], [void *x = alloca(4);], [ need_kalloca=yes ])
    c_switch_system="$xe_save_c_switch_system"])
  AC_MSG_RESULT($need_kalloca)
  test "$need_kalloca" = "yes" && XE_APPEND(-Kalloca,c_switch_system)
fi

dnl Calculate value of CFLAGS:
dnl Use either command line flag, environment var, or autodetection
if test "$cflags_specified" = "no"; then
  dnl Following values of CFLAGS are known to work well.
  dnl Should we take debugging options into consideration?
  if   test "$GCC" = "yes"; then
    CFLAGS="-g -O3 -Wall -Wno-switch -Winline -Wmissing-prototypes"
    dnl Yuck, bad compares have been worth at least 3 crashes!
    CFLAGS="$CFLAGS -Wsign-compare"
    dnl XEmacs is known not to be strict-aliasing-safe.
    case "`gcc -v --help 2>&1`" in
      *-fstrict-aliasing* ) CFLAGS="$CFLAGS -fno-strict-aliasing" ;;
    esac
    dnl You get five zillion shadowing warnings with g++.
    dnl Even with gcc, -Wshadow is questionable because of its complaints
    dnl about parameters with the same names as global functions.
    if test "$xemacs_compiler" != "g++"; then
      CFLAGS="$CFLAGS -Wshadow"
    fi
    dnl glibc is intentionally not `-Wpointer-arith'-clean.
    dnl Ulrich Drepper has rejected patches to fix the glibc header files.
    test "$have_glibc" != "yes" && CFLAGS="$CFLAGS -Wpointer-arith"
    dnl I'm not convinced this is a good idea any more. -sb
    dnl test "$opsys $machine" = "linux intel386" && \
    dnl CFLAGS="$CFLAGS -fno-strength-reduce -malign-loops=2 -malign-jumps=2 -malign-functions=2"
  elif test "$__SUNPRO_C" = "yes"; then
    case "$opsys" in
      sol2    ) CFLAGS="-v -xO4" ;;
      sunos4* ) CFLAGS="-xO2";;
    esac
  elif test "$__DECC" = "yes"; then
    CFLAGS="-O3"
  elif test "$CC" = "xlc"; then
    CFLAGS="-g -O3 -qstrict -qnoansialias -qlibansi -qinfo -qro -qmaxmem=20000"
  dnl ### Add optimal CFLAGS support for other compilers HERE!
  else
    CFLAGS="-O" ;dnl The only POSIX-approved flag
  fi
fi

dnl Search for GCC specific build problems we know about
if test "$GCC" = "yes"; then
AC_MSG_CHECKING(for buggy gcc versions)
GCC_VERSION=`$CC --version`
case `uname -s`:`uname -m`:$GCC_VERSION in
        dnl egcs 2.90.21 (egcs-1.00 release)
        dnl egcs 2.90.29 (egcs-1.0.3 release)
    *:sun4*:2.8.1|*:sun4*:egcs-2.90.*)
        dnl Don't use -O2 with gcc 2.8.1 and egcs 1.0 under SPARC architectures
        dnl without also using `-fno-schedule-insns'.
        case "$CFLAGS" in
            *-O2*|*-O3*)
                case "$CFLAGS" in
                    *-fno-schedule-insns*) ;;
                    *)
                        AC_MSG_RESULT(yes)
                        AC_MSG_WARN(Don't use -O2 with gcc 2.8.1 and egcs 1.0 under SPARC architectures)
                        AC_MSG_WARN(without also using -fno-schedule-insns.)
                        AC_MSG_ERROR(Aborting due to known problem)
                        ;;
                esac
                ;;
        esac
        ;;
        dnl egcs-2.91.57 (egcs-1.1 release)
        dnl egcs-2.91.66 (egcs-1.1.2 release)
    Linux:alpha:egcs-2.91.*)
        AC_MSG_RESULT(yes)
        AC_MSG_WARN(There have been reports of egcs-1.1 not compiling XEmacs correctly on)
        AC_MSG_WARN(Alpha Linux.  There have also been reports that egcs-1.0.3a is O.K.)
        AC_MSG_ERROR(Aborting due to known problem)
        ;;
    *:i*86*:2.7.2*)
        case "$CFLAGS" in
            *-O2*|*-O3*)
                case "$GCC_VERSION" in
                    2.7.2)
                        case "$CFLAGS" in
                            *-fno-strength-reduce*) ;;
                            *)
                                AC_MSG_RESULT(yes)
                                AC_MSG_WARN(Don't use -O2 with gcc 2.7.2 under Intel/XXX without also using)
                                AC_MSG_WARN(-fno-strength-reduce.)
                                AC_MSG_ERROR(Aborting due to known problem)
                                ;;
                        esac
                        ;;
                esac
                case "$CFLAGS" in
                 *-fno-caller-saves*) ;;
                 *)
                    AC_MSG_RESULT(yes)
                    AC_MSG_WARN(Don't use -O2 with gcc 2.7.2 under Intel/XXX without also using)
                    AC_MSG_WARN(-fno-caller-saves.)
                    AC_MSG_ERROR(Aborting due to known problem)
                    ;;
                esac
                ;;
        esac
        ;;
esac
AC_MSG_RESULT(no)
fi

dnl GNU ld now defaults to combreloc, which screws up unexec, but not pdump.
dnl Note that it's OK if the GNU style long option causes non-GNU ld to barf
dnl a usage message, that's often good enough.  Please report it, though.
dnl #### Should make this Solaris-friendly.
dnl Link with -z nocombreloc for now.
if test "$pdump" != "yes"; then
  AC_MSG_CHECKING(for \"-z nocombreloc\" linker flag)
  case "`ld --help 2>&1`" in
    *-z\ nocombreloc* ) AC_MSG_RESULT(yes)
      XE_PREPEND(-z nocombreloc, ld_switch_site) ;;
    *) AC_MSG_RESULT(no) ;;
  esac
fi


dnl Inform compiler that certain flags are meant for the linker
dnl XE_PROTECT_LINKER_FLAGS(shell_var)
define([XE_PROTECT_LINKER_FLAGS], [
if test "$GCC" = "yes"; then
  set x $[$1]; shift; [$1]=""
  while test -n "[$]1"; do
    case [$]1 in
      -L  | -l  | -u               ) [$1]="$[$1] [$]1 [$]2"; shift ;;
      -L* | -l* | -u* | -Wl* | -pg ) [$1]="$[$1] [$]1" ;;
      -Xlinker* ) ;;
      * ) [$1]="$[$1] -Xlinker [$]1" ;;
    esac
    shift
  done
fi])dnl
XE_PROTECT_LINKER_FLAGS(ld_switch_system)
XE_PROTECT_LINKER_FLAGS(ld_switch_machine)
XE_PROTECT_LINKER_FLAGS(ld_switch_site)
XE_PROTECT_LINKER_FLAGS(LDFLAGS)
XE_PROTECT_LINKER_FLAGS(ld_call_shared)

dnl Add s&m-determined objects (including unexec) to link line
test -n "$objects_machine" && XE_ADD_OBJS($objects_machine)
test -n "$objects_system"  && XE_ADD_OBJS($objects_system)
test -n "$unexec"          && test ! "$pdump" = "yes" && XE_ADD_OBJS($unexec)
test "$pdump" = "yes" && XE_ADD_OBJS(dumper.o)

dnl Dynodump (Solaris 2.x, x<6)
AC_MSG_CHECKING(for dynodump)
if test "$unexec" != "unexsol2.o"; then
  AC_MSG_RESULT(no)
else
  AC_MSG_RESULT(yes)
  AC_DEFINE(DYNODUMP)
  XE_APPEND(dynodump, MAKE_SUBDIR)
  XE_APPEND(dynodump, SRC_SUBDIR_DEPS)
  case "$machine" in
    sparc   ) dynodump_arch=sparc ;;
    *86*    ) dynodump_arch=i386  ;;
    powerpc ) dynodump_arch=ppc   ;;
  esac
  dnl Dynodump requires the system linker
  test "$GCC" = "yes" && XE_APPEND(-fno-gnu-linker, ld_switch_site)
fi

dnl Feed s&m crud to src/Makefile

dnl Linux/powerpc needs the following magic for some reason
test "$machine$opsys" = "powerpclinux" && start_flags="-T $srcdir/src/ppc.ldscript"

if test "$unexec" = "unexaix.o"; then
dnl AIX needs various hacks to make static linking work.
  if   test "$dynamic" = "no"; then
  start_flags="-Wl,-bnso,-bnodelcsect"
  test "$GCC" = "yes" && start_flags="-B/bin/ ${start_flags}"
  for f in "/lib/syscalls.exp" "/lib/threads.exp"; do
    if test -r "$f"; then start_flags="${start_flags},-bI:${f}"; fi
  done
  for f in "/usr/lpp/X11/bin/smt.exp" "/usr/bin/X11/smt.exp"; do
    if test -r "$f"; then start_flags="${start_flags},-bI:${f}"; break; fi
  done
  AC_CHECK_LIB(C, terminateAndUnload, XE_APPEND(-lC, libs_system))
  fi
elif test -n "$ld_text_start_addr"; then
  start_flags="-T $ld_text_start_addr -e __start"
fi
AC_SUBST(start_flags)

AC_SUBST(ld_switch_shared)
AC_SUBST(start_files)
if test "$ordinary_link" = "no" -a "$GCC" = "yes"; then
 test -z "$linker" &&  linker='$(CC) -nostdlib'
 test -z "$lib_gcc" && lib_gcc='`$(CC) -print-libgcc-file-name`'
fi
test "$GCC" != "yes" && lib_gcc=
AC_SUBST(ld)
AC_SUBST(lib_gcc)

dnl ---------------------------------------------------------------
dnl Add site and system specific flags to compile and link commands
dnl ---------------------------------------------------------------

dnl Allow use of either ":" or spaces for lists of directories
define(COLON_TO_SPACE,
  [case "$[$1]" in *:* [)] [$1]="`echo '' $[$1] | sed -e 's/^ //' -e 's/:/ /g'`";; esac])dnl

dnl --site-libraries (multiple dirs)
COLON_TO_SPACE(site_libraries)
if test -n "$site_libraries"; then
  for arg in $site_libraries; do
    case "$arg" in
     -* ) ;;
     * ) test -d "$arg" || \
           XE_DIE("Invalid site library \`$arg': no such directory")
       arg="-L${arg}" ;;
    esac
    XE_APPEND($arg, ld_switch_site)
  done
fi

dnl --site-includes (multiple dirs)
COLON_TO_SPACE(site_includes)
if test -n "$site_includes"; then
  for arg in $site_includes; do
    case "$arg" in
      -* ) ;;
      * ) test -d "$arg" || \
           XE_DIE("Invalid site include \`$arg': no such directory")
      arg="-I${arg}" ;;
    esac
    XE_APPEND($arg, c_switch_site)
  done
fi

dnl --site-prefixes (multiple dirs)
dnl --site-prefixes=dir1:dir2 is a convenient shorthand for
dnl --site-libraries=dir1/lib:dir2/lib --site-includes=dir1/include:dir2/include
dnl Site prefixes take precedence over the standard places, but not over
dnl site-includes and site-libraries.
COLON_TO_SPACE(site_prefixes)
if test -n "$site_prefixes"; then
  for dir in $site_prefixes; do
    lib_dir="${dir}/lib"
    inc_dir="${dir}/include"
    if test ! -d "$dir"; then
      XE_DIE("Invalid site prefix \`$dir': no such directory")
    elif test ! -d "$lib_dir"; then
      XE_DIE("Invalid site prefix \`$dir': no such directory \`$lib_dir'")
    else
      if test -d "$inc_dir"; then
        XE_APPEND("-I$inc_dir", c_switch_site)
      fi
      XE_APPEND("-L$lib_dir", ld_switch_site)
    fi
  done
fi

dnl GNU software installs by default into /usr/local/{include,lib}
dnl if test -d "/usr/local/include" -a -d "/usr/local/lib"; then
dnl   XE_APPEND("-L/usr/local/lib",    ld_switch_site)
dnl   XE_APPEND("-I/usr/local/include", c_switch_site)
dnl fi

dnl Extra system-specific library directories - please add to list
for dir in "/usr/ccs/lib"; do
  test -d "$dir" && XE_APPEND(-L${dir}, ld_switch_system)
done

dnl --site-runtime-libraries (multiple dirs)
COLON_TO_SPACE(site_runtime_libraries)
if test -n "$site_runtime_libraries"; then
  LD_RUN_PATH="`echo $site_runtime_libraries | sed -e 's/  */:/g'`"
  export LD_RUN_PATH
fi

dnl Linux systems have dynamic runtime library directories listed in
dnl /etc/ld.so.conf.  Since those are used at run time, it seems pretty
dnl safe to use them at link time, and less controversial than forcing
dnl the run-time to use the link-time libraries.  This also helps avoid
dnl mismatches between the link-time and run-time libraries.

dnl #### Unfortunately, there are horrible libc4 and libc5 libraries
dnl listed in /etc/ld.so.conf on some systems, and including them on
dnl the link path leads to linking in utterly broken libc's.
dnl There are many clever ways of approaching this problem,
dnl but finding one that actually works...

dnl if test -z "$LD_RUN_PATH" -a -r "/etc/ld.so.conf"; then
dnl   for dir in `cat /etc/ld.so.conf`; do
dnl     test -d "$dir" && XE_APPEND(-L${dir}, ld_switch_system)
dnl   done
dnl   add_runtime_path=no
dnl fi

dnl -------------------------------------
dnl Compute runtime library path
dnl -------------------------------------

if test -n "$add_runtime_path"; then :;
elif test "$dynamic" = "no"; then add_runtime_path=no
elif test -n "$LD_RUN_PATH"; then add_runtime_path=yes
else case "$opsys" in
       sol2 | irix* | *bsd* | decosf* ) add_runtime_path=yes ;;
       * ) add_runtime_path=no ;;
     esac
fi

if test "$add_runtime_path" = "yes"; then
  dnl Try to autodetect runtime library flag (usually -R),
  dnl and whether it works (or at least does no harm)
  AC_MSG_CHECKING("for runtime libraries flag")
  case "$opsys" in
    sol2 ) dash_r="-R" ;;
    decosf* | linux* | irix*) dash_r="-rpath " ;;
    *)
      dash_r=""
      for try_dash_r in "-R" "-R " "-rpath "; do
        xe_check_libs="${try_dash_r}/no/such/file-or-directory"
        XE_PROTECT_LINKER_FLAGS(xe_check_libs)
        AC_TRY_LINK(, , dash_r="$try_dash_r")
        xe_check_libs=""
        test -n "$dash_r" && break
      done ;;
  esac
  if test -n "$dash_r";
    then AC_MSG_RESULT("\"${dash_r}\"")
    else AC_MSG_RESULT(NONE)
  fi
fi

xe_add_unique_runpath_dir='
  xe_add_p=yes
  for xe_dir in $runpath_dirs; do   dnl Uniquify
    test "$xe_dir" = "$xe_runpath_dir" && xe_add_p=no
  done
  if test "$xe_add_p" = "yes"; then
    test -n "$runpath" && runpath="${runpath}:"
    runpath="${runpath}${xe_runpath_dir}"
    runpath_dirs="$runpath_dirs $xe_runpath_dir"
  fi'


dnl XE_ADD_RUNPATH_DIR(directory)
define([XE_ADD_RUNPATH_DIR],[{
xe_runpath_dir=$1
dnl PRINT_VAR(ld_switch_site ld_switch_x_site runpath xe_runpath_dir LD_RUN_PATH xe_ldflags)
  test "$xe_runpath_dir" != "/lib"     -a \
        "$xe_runpath_dir" != "/usr/lib" -a \
        -n "`ls ${xe_runpath_dir}/*.s[[ol]] 2>/dev/null`" && \
  eval "$xe_add_unique_runpath_dir"
}])dnl

dnl XE_COMPUTE_RUNPATH()
define([XE_COMPUTE_RUNPATH],[
if test "$add_runtime_path" = "yes" -a -n "$dash_r"; then
  dnl Remove runtime paths from current ld switches
  ld_switch_site=`echo   '' $ld_switch_site   | sed -e 's:^ ::' -e "s/$dash_r[[^ ]]*//g"`
  ld_switch_x_site=`echo '' $ld_switch_x_site | sed -e 's:^ ::' -e "s/$dash_r[[^ ]]*//g"`
  dnl PRINT_VAR(ld_switch_site ld_switch_x_site)

  dnl Fix up Runtime path
  dnl If LD_RUN_PATH is set in environment, use that.
  dnl In this case, assume user has set the right value.
  runpath="" runpath_dirs=""
  if test -n "$LD_RUN_PATH"; then
    runpath="$LD_RUN_PATH"
  elif test "$GCC" = "yes"; then
    dnl Compute runpath from gcc's -v output
    ld_switch_run_save="$ld_switch_run"; ld_switch_run=""
    echo "int main(int argc, char *argv[[]]) {return 0;}" > conftest.c
    xe_runpath_link='${CC-cc} -o conftest -v $CFLAGS '"$xe_ldflags"' conftest.$ac_ext 2>&1 1>/dev/null'
    for arg in `eval "$xe_runpath_link" | grep ' -L'`; do
      case "$arg" in P,* | -L* | -R* )
        for dir in `echo '' "$arg" | sed -e 's:^ ::' -e 's/^..//' -e 'y/:/ /'`; do
          XE_ADD_RUNPATH_DIR("$dir")
        done ;;
      esac
    done
    ld_switch_run="$ld_switch_run_save"
    rm -f conftest*
  else
    dnl Add all directories with .so files to runpath
    for arg in $ld_switch_site $ld_switch_x_site; do
      case "$arg" in -L*) XE_ADD_RUNPATH_DIR(`echo '' "$arg" | sed -e 's:^ ::' -e 's/^-L//'`);; esac
    done
    dnl Sometimes /opt/SUNWdt/lib is the only installed Motif available
    if test "$opsys $need_motif" = "sol2 yes"; then
      xe_runpath_dir="/opt/SUNWdt/lib";
      eval "$xe_add_unique_runpath_dir";
    fi
  fi dnl Compute $runpath

  if test -n "$runpath"; then
    ld_switch_run="${dash_r}${runpath}"
    XE_PROTECT_LINKER_FLAGS(ld_switch_run)
    test "$extra_verbose" = "yes" && echo "Setting runpath to $runpath"
  fi
fi
])dnl
XE_COMPUTE_RUNPATH()

dnl -----------------------------------
dnl Do some misc autoconf-special tests
dnl -----------------------------------

dnl Do the opsystem or machine files prohibit the use of the GNU malloc?
dnl Assume not, until told otherwise.
GNU_MALLOC=yes
if test "$with_dlmalloc" != "no"; then
        doug_lea_malloc=yes
else
        doug_lea_malloc=no
fi
after_morecore_hook_exists=yes
AC_CHECK_FUNC(malloc_set_state, ,doug_lea_malloc=no)
AC_MSG_CHECKING(whether __after_morecore_hook exists)
AC_TRY_LINK([extern void (* __after_morecore_hook)();],[__after_morecore_hook = 0],
  [AC_MSG_RESULT(yes)],
  [AC_MSG_RESULT(no)
   after_morecore_hook_exists=no])
if test "$system_malloc" = "yes" ; then
  GNU_MALLOC=no
  GNU_MALLOC_reason="
    - The GNU allocators don't work with this system configuration."
elif test "$with_system_malloc" = "yes" ; then
  GNU_MALLOC=no
  GNU_MALLOC_reason="
    - User chose not to use GNU allocators."
elif test "$with_debug_malloc" = "yes" ; then
  GNU_MALLOC=no
  GNU_MALLOC_reason="
    - User chose to use Debugging Malloc."
fi

if test "$doug_lea_malloc" = "yes" -a "$GNU_MALLOC" = "yes" ; then
  GNU_MALLOC_reason="
    - Using Doug Lea's new malloc from the GNU C Library."
  AC_DEFINE(DOUG_LEA_MALLOC)
  if test "$after_morecore_hook_exists" = "no" ; then
    GNU_MALLOC_reason="
    - Using Doug Lea's new malloc from the Linux C Library."
    AC_DEFINE(_NO_MALLOC_WARNING_)
  fi
fi

dnl #### mcheck is broken in all versions of Linux libc and glibc.
dnl Try this again when 2.1 hits the streets.
dnl Avoid using free-hook.c if support exists for malloc debugging in libc
dnl have_libmcheck=no
dnl if test "$error_check_malloc" = "yes" -a \
dnl    "$have_glibc" = "yes" -a \
dnl    "$doug_lea_malloc" = "yes"; then
dnl   AC_CHECK_HEADERS(mcheck.h)
dnl   AC_CHECK_LIB(mcheck, mcheck, have_libmcheck=yes, have_libmcheck=no)
dnl fi

dnl if test "$have_libmcheck" = "yes"; then
dnl   AC_DEFINE(HAVE_LIBMCHECK)
dnl   libmcheck=-lmcheck
dnl   AC_SUBST(libmcheck)
dnl fi

dnl Some other nice autoconf tests.  If you add a test here which
dnl should make an entry in src/config.h, do not forget to add an
dnl #undef clause to src/config.h.in for autoconf to modify.

AC_PROG_RANLIB
AC_PROG_INSTALL
AC_PROG_YACC

dnl checks for header files
AC_CHECK_HEADERS(dnl
  a.out.h dnl
  elf.h dnl
  cygwin/version.h dnl
  fcntl.h dnl
  inttypes.h dnl
  libgen.h dnl
  locale.h dnl
  mach/mach.h dnl
  sys/param.h dnl
  sys/pstat.h dnl
  sys/time.h dnl
  sys/timeb.h dnl
  sys/un.h dnl
  ulimit.h dnl
  unistd.h dnl
)
AC_HEADER_SYS_WAIT
AC_HEADER_STDC
AC_HEADER_TIME
AC_DECL_SYS_SIGLIST


dnl ----------------------------------------------------------------
dnl Checking for utime() or utimes().
dnl We prefer utime, since it is more standard.
dnl Some systems have utime.h but do not declare the struct anyplace,
dnl so we use a more sophisticated test for utime than AC_CHECK_FUNCS.
dnl ----------------------------------------------------------------
AC_MSG_CHECKING(for utime)
AC_TRY_COMPILE([#include <sys/types.h>
#include <utime.h>],
[struct utimbuf x; x.actime = x.modtime = 0; utime ("/", &x);],
  [AC_MSG_RESULT(yes)
   AC_DEFINE(HAVE_UTIME)],
  [AC_MSG_RESULT(no)
   dnl We don't have utime(); how about utimes()?
   AC_CHECK_FUNCS(utimes)])


dnl checks for typedefs
AC_TYPE_SIGNAL
AC_TYPE_SIZE_T
AC_TYPE_PID_T
AC_TYPE_UID_T
AC_TYPE_MODE_T
AC_TYPE_OFF_T
AC_CHECK_TYPE(ssize_t, int)

dnl check for Unix98 socklen_t
AC_MSG_CHECKING(for socklen_t)
AC_TRY_COMPILE([#include <sys/types.h>
#include <sys/socket.h>
socklen_t x;
],[],[AC_MSG_RESULT(yes)],[
AC_TRY_COMPILE([#include <sys/types.h>
#include <sys/socket.h>
int accept (int, struct sockaddr *, size_t *);
],[],[
AC_MSG_RESULT(size_t)
AC_DEFINE(socklen_t,size_t)], [
AC_MSG_RESULT(int)
AC_DEFINE(socklen_t,int)])])

AC_MSG_CHECKING(for struct timeval)
AC_TRY_COMPILE([#ifdef TIME_WITH_SYS_TIME
#include <sys/time.h>
#include <time.h>
#else
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#else
#include <time.h>
#endif
#endif], [static struct timeval x; x.tv_sec = x.tv_usec;],
  [AC_MSG_RESULT(yes)
  HAVE_TIMEVAL=yes
  AC_DEFINE(HAVE_TIMEVAL)],
  [AC_MSG_RESULT(no)
   HAVE_TIMEVAL=no])

dnl checks for structure members
AC_STRUCT_TM
AC_STRUCT_TIMEZONE

dnl checks for compiler characteristics
AC_C_CONST

dnl check for Make feature
AC_PROG_MAKE_SET

dnl check byte order
AC_C_BIGENDIAN

dnl define SIZEOF_TYPE
AC_CHECK_SIZEOF(short)
if test "$ac_cv_sizeof_short" = 0; then
  echo ""
  echo "*** PANIC *** Configure tests are not working - compiler is broken."
  echo "*** PANIC *** Please examine config.log for compilation errors."
  exit 1
fi
AC_CHECK_SIZEOF(int)
AC_CHECK_SIZEOF(long)
AC_CHECK_SIZEOF(long long)
AC_CHECK_SIZEOF(void *)

dnl Cygwin from 1003022 has intptr_t, uintptr_t in <cygwin/types.h>
case $opsys in
  cygwin* ) AC_EGREP_HEADER([typedef.*intptr_t;], [cygwin/types.h],
                            [AC_MSG_RESULT(yes)
                             AC_DEFINE(INTPTR_T_IN_CYGWIN_TYPES_H,1)],
                            [AC_MSG_RESULT(no)]) ;;
esac

dnl check for long file names
AC_SYS_LONG_FILE_NAMES

dnl -lm is required by LISP_FLOAT_TYPE, among other things
AC_CHECK_FUNC(sin, ,AC_CHECK_LIB(m, sin))

dnl Floating operation support is now unconditional
AC_DEFINE(LISP_FLOAT_TYPE)

AC_TRY_LINK([#include <math.h>],
  [return atanh(1.0) + asinh(1.0) + acosh(1.0); ],
  AC_DEFINE(HAVE_INVERSE_HYPERBOLIC))

dnl Determine type of mail locking from configure args and s&m headers
AC_CHECKING(type of mail spool file locking)
AC_CHECK_FUNCS(lockf flock)
dnl The mail_use_xxx variables are set according to the s&m headers.
test -z "$mail_locking" -a "$mail_use_flock" = "yes" && mail_locking=flock
test -z "$mail_locking" -a "$mail_use_lockf" = "yes" && mail_locking=lockf
test -z "$mail_locking" -a "$mail_use_locking" = "yes" && mail_locking=locking
if   test -z "$mail_locking"; then
  case "$opsys" in cygwin* | mingw*)
    mail_locking=pop ;;
  esac
fi

if   test "$mail_locking" = "lockf"; then AC_DEFINE(MAIL_LOCK_LOCKF)
elif test "$mail_locking" = "flock"; then AC_DEFINE(MAIL_LOCK_FLOCK)
elif test "$mail_locking" = "locking"; then AC_DEFINE(MAIL_LOCK_LOCKING)
elif test "$mail_locking" = "pop"; then
  with_pop=yes
  mail_locking=
else mail_locking="dot-locking"; AC_DEFINE(MAIL_LOCK_DOT)
fi
test "$mail_locking" = "lockf" -a "$ac_cv_func_lockf" != "yes" && \
  XE_DIE("lockf mail locking requested but not available.")
test "$mail_locking" = "flock" -a "$ac_cv_func_flock" != "yes" && \
  XE_DIE("flock mail locking requested but not available.")
test "$mail_locking" = "locking" -a "$ac_cv_func_locking" != "yes" && \
  XE_DIE("locking mail locking requested but not available.")

case "$opsys" in decosf*)
  AC_CHECK_LIB(pthreads, cma_open)
  test "$ac_cv_lib_pthreads_cma_open" = "yes" && \
    c_switch_site="$c_switch_site -threads" ;;
esac

dnl ----------------------------------------------------------------
dnl Miscellaneous flags
dnl ----------------------------------------------------------------

AC_MSG_CHECKING(whether the -xildoff compiler flag is required)
if   ${CC-cc} '-###' -xildon  no_such_file.c 2>&1 | grep '^[^ ]*/ild ' > /dev/null ; then
  if ${CC-cc} '-###' -xildoff no_such_file.c 2>&1 | grep '^[^ ]*/ild ' > /dev/null ;
    then AC_MSG_RESULT(no);
    else AC_MSG_RESULT(yes); XE_APPEND(-xildoff, ld_switch_site)
  fi
  else AC_MSG_RESULT(no)
fi

dnl Link with "-z ignore" on Solaris if supported
if test "$opsys" = "sol2"; then
  if test "$os_release" -ge 56; then
    AC_MSG_CHECKING(for \"-z ignore\" linker flag)
    case "`ld -h 2>&1`" in
      *-z\ ignore\|record* ) AC_MSG_RESULT(yes)
        XE_PREPEND(-z ignore, ld_switch_site) ;;
      *) AC_MSG_RESULT(no) ;;
    esac
  fi
fi

dnl ----------------------
dnl Choose a window system
dnl ----------------------

AC_CHECKING("for specified window system")

dnl Autodetection of Gdk libraries and includes
dnl -------------------------------------------
dnl On some systems (FreeBSD springs to mind), they use
dnl versions on the utility routines, so instead of gtk-config
dnl you must use gtk12-config, etc, etc.

GNOME_CONFIG=no
GTK_CONFIG=no

if test "$with_gnome" != "no"; then
   AC_MSG_CHECKING(for GNOME configuration script)
   for possible in gnome-config
   do
      possible_version=`${possible} --version 2> /dev/null`
      if test "x${possible_version}" != "x"; then
              GNOME_CONFIG="${possible}"
              with_gnome=yes
              with_gtk=yes
              break
      fi
   done
   AC_MSG_RESULT([${GNOME_CONFIG}])
fi

if test "${GNOME_CONFIG}" != "no"; then
      GNOME_LIBS=`${GNOME_CONFIG} --libs gnomeui`
      GNOME_CFLAGS=`${GNOME_CONFIG} --cflags gnomeui`
      AC_DEFINE(HAVE_GNOME)
      XE_APPEND(${GNOME_LIBS}, libs_gtk)
      XE_APPEND(${GNOME_CFLAGS}, c_switch_gtk)
fi

if test "$with_gtk" != "no";then
   AC_MSG_CHECKING(for GTK configuration script)
   for possible in gtk12-config gtk14-config gtk-config
   do
      possible_version=`${possible} --version 2> /dev/null`
      if test "x${possible_version}" != "x"; then
              GTK_CONFIG="${possible}"
      fi
      case "${possible_version}" in
        1.0.*) AC_MSG_WARN([GTK 1.2 is required, please upgrade your version of GTK.]); with_gtk=no;;
        1.3.*) AC_MSG_WARN([GTK 1.3 is not supported right now]); with_gtk=no;;
        1.2.*)
                with_gtk=yes
                break
                ;;
        *)     AC_MSG_WARN([Found unsupported version of GTK: $possible_version]);;
      esac
   done
   AC_MSG_RESULT([${GTK_CONFIG}])
fi

if test "${GTK_CONFIG}" != "no"; then
      AC_MSG_CHECKING(gtk version)
      GTK_VERSION=`${GTK_CONFIG} --version`
      AC_MSG_RESULT(${GTK_VERSION})

      AC_MSG_CHECKING(gtk libs)
      GTK_LIBS=`${GTK_CONFIG} --libs`
      XE_APPEND(${GTK_LIBS}, libs_gtk)
      AC_MSG_RESULT(${GTK_LIBS})

      AC_MSG_CHECKING(gtk cflags)
      GTK_CFLAGS=`${GTK_CONFIG} --cflags`
      if test "$GCC" = "yes"; then
        GTK_CFLAGS="${GTK_CFLAGS} -Wno-shadow"
      fi
      XE_APPEND(${GTK_CFLAGS}, c_switch_gtk)
      AC_MSG_RESULT(${GTK_CFLAGS})

      AC_CHECK_LIB(gdk_imlib, main, XE_PREPEND(-lgdk_imlib, libs_gtk))
      AC_CHECK_LIB(Imlib, Imlib_init, XE_APPEND(-lImlib, libs_gtk))
      AC_CHECK_FUNCS(gdk_imlib_init)

      AC_DEFINE(HAVE_XPM)
      AC_DEFINE(HAVE_GTK)
      AC_SUBST(GTK_CONFIG)

      window_system=gtk
      with_gtk=yes
      with_x11=no

      test "${with_scrollbars}" != "no" && with_scrollbars=gtk
      test "${with_toolbars}" != no && with_toolbars=gtk
      test "${with_menubars}" != "no" && with_menubars=gtk
      test "${with_dialogs}" != "no" && with_dialogs=gtk
      test "${with_widgets}" != "no" && with_widgets=gtk

      XE_ADD_OBJS(console-gtk.o device-gtk.o event-gtk.o frame-gtk.o)
      XE_ADD_OBJS(objects-gtk.o redisplay-gtk.o glyphs-gtk.o)
      XE_ADD_OBJS(select-gtk.o gccache-gtk.o)
      XE_ADD_OBJS(gtk-xemacs.o ui-gtk.o)

      dnl Check for libglade support (it rocks)
      OLD_CFLAGS="${CFLAGS}"
      OLD_CPPFLAGS="${CPPFLAGS}"
      OLD_LDFLAGS="${LDFLAGS}"
      CFLAGS="${GTK_CFLAGS} ${CFLAGS}"
      CPPFLAGS="${GTK_CFLAGS} ${CFLAGS}"
      LDFLAGS="${LDFLAGS} ${GTK_LIBS}"
      AC_CHECK_HEADERS(glade/glade.h glade.h)
      AC_CHECK_LIB(xml, main, XE_PREPEND(-lxml, libs_gtk))
      AC_CHECK_LIB(glade, main, XE_PREPEND(-lglade, libs_gtk))
      AC_CHECK_LIB(glade-gnome, main, XE_PREPEND(-lglade-gnome, libs_gtk))
      AC_EGREP_HEADER([char \*txtdomain;], [glade/glade-xml.h],
                      [AC_MSG_RESULT(yes)
                       AC_DEFINE(LIBGLADE_XML_TXTDOMAIN,1)],
                      [AC_MSG_RESULT(no)])
      CFLAGS="${OLD_CFLAGS}"
      CPPFLAGS="${OLD_CPPFLAGS}"
      LDFLAGS="${OLD_LDFLAGS}"
fi

dnl We may eventually prefer gtk/gdk over vanilla X11...

if test "$with_x11" != "no"; then
  dnl User-specified --x-includes or --x-libraries implies --with-x11.
  test "$x_includes $x_libraries" != "NONE NONE" && \
   window_system=x11 with_x11=yes

  dnl Autodetection of X11 libraries and includes
  dnl -------------------------------------------
  dnl AC_PATH_XTRA thinks it can find our X headers and includes, but
  dnl it often gets it wrong, so we only use it as a last resort.

  dnl $OPENWINHOME implies --x-includes and --x-libraries
  dnl Not (yet) handled by autoconf2
  if test "$x_includes $x_libraries" = "NONE NONE" \
    -a -n "$OPENWINHOME" \
    -a "$OPENWINHOME" != "/usr/openwin" \
    -a -d "$OPENWINHOME"; then
      test -d "$OPENWINHOME/lib"           && x_libraries="$OPENWINHOME/lib"
      test -d "$OPENWINHOME/include"       && x_includes="$OPENWINHOME/include"
      test -d "$OPENWINHOME/share/include" && x_includes="$OPENWINHOME/share/include"
  fi

  if test "$x_includes" = "NONE"; then
    dnl AC_PATH_XTRA often guesses /usr/include, when some other
    dnl include directory is a MUCH better guess (Linux, HP-UX 10.20).
    dnl This is a workaround for idiot (esp. HP) system vendors, who
    dnl provide a /usr/include/X11, but DON'T FULLY POPULATE IT.
    for dir in "/usr/X11" "/usr/X11R6"; do
      if test -d "$dir/include/X11"; then x_includes="$dir/include"; break; fi
    done
  fi

  if test "$x_libraries" = "NONE"; then
    for dir in "/usr/X11/lib" "/usr/X11R6/lib" "/usr/lib/X11R6"; do
      if test -r "$dir/libX11.a"; then x_libraries="$dir"; break; fi
    done
  fi

  AC_PATH_XTRA # Autoconf claims to find X library and include dirs for us.
  if test "$no_x" = "yes"
  then with_x11=no  window_system=none HAVE_X_WINDOWS=no
  else with_x11=yes window_system=x11  HAVE_X_WINDOWS=yes
  fi
fi

dnl #### wmperry:: !x11 != NONE
dnl case "$with_x11" in
dnl  yes ) window_system=x11  HAVE_X_WINDOWS=yes ;;
dnl  no  ) window_system=none HAVE_X_WINDOWS=no  ;;
dnl esac

if test "$with_x11" = "yes"; then
  AC_DEFINE(HAVE_X_WINDOWS)
  XE_APPEND(lwlib, MAKE_SUBDIR)
  XE_APPEND(lwlib, SRC_SUBDIR_DEPS)


  dnl Look for Motif, but only if not found in $x_includes and $x_libraries
  AC_CHECK_HEADER(Xm/Xm.h, [AC_CHECK_LIB(Xm, XmStringFree, got_motif=yes)])

  if test "$got_motif" != "yes"; then
    dnl Try to find Motif/CDE/Tooltalk dirs
    dnl These take precedence over other X libs/includes, so PRE-pend
    for lib_dir in "/usr/dt/lib" "/usr/lib/Motif2.1" \
                   "/usr/lib/Motif1.2" "/usr/lib/Motif1.1"; do
      inc_dir=`echo $lib_dir | sed -e 's/lib/include/'`
      if test -d "$lib_dir" -a -d "$inc_dir"; then
        case "$x_libraries" in *"$lib_dir"* ) ;; *)
          x_libraries="$lib_dir $x_libraries"
          XE_PREPEND(-L${lib_dir}, X_LIBS) ;;
        esac
        case "$x_includes" in "$inc_dir"* ) ;; *)
          x_includes="$inc_dir $x_includes"
          XE_PREPEND(-I${inc_dir}, X_CFLAGS) ;;
        esac
        break; dnl only need ONE Motif implementation!
        fi
    done
  fi

  dnl Contrib X libs/includes do NOT take precedence, so AP-pend
  for rel in "X11R6" "X11R5" "X11R4"; do
    lib_dir="/usr/contrib/$rel/lib" inc_dir="/usr/contrib/$rel/include"
    if test -d "$lib_dir" -a -d "$inc_dir"; then
      case "$x_libraries" in *"$lib_dir"* ) ;; *)
        x_libraries="$x_libraries $lib_dir"
        XE_APPEND(-L${lib_dir}, X_LIBS)
      esac
      case "$x_includes" in "$inc_dir"* ) ;; *)
        x_includes="$x_includes $inc_dir"
        XE_APPEND(-I${inc_dir}, X_CFLAGS)
      esac
      break; dnl Only need ONE X11 implementation !
    fi
  done

  dnl Avoid version mismatch for shared library libXm.so on osf4
  case "$opsys" in
  decosf*) if test "$GCC" = yes -a -d /usr/shlib; then XE_APPEND(-L/usr/shlib, X_LIBS); fi ;;
  esac

  ld_switch_x_site="$X_LIBS"

  XE_COMPUTE_RUNPATH()

  if test "$extra_verbose" = "yes"; then
    echo; echo "X11 compilation variables:"
    PRINT_VAR(x_libraries x_includes X_CFLAGS X_LIBS X_PRE_LIBS X_EXTRA_LIBS)
    echo
  fi

  dnl Set up bitmaps search path.
  dnl The original suggestion was to unconditionally to append X11/bitmaps
  dnl to each element of $x_includes, I'm pretty sure this is the wrong
  dnl thing to do.  We test for bitmaps and X11/bitmaps directories on each
  dnl element and add them to BITMAPDIR if they exist.
  bitmapdirs=
  if test "$x_includes" != NONE; then
    for i in $x_includes; do
      if test -d "$i/bitmaps"; then
        bitmapdirs="$i/bitmaps:$bitmapdirs"
      fi
      if test -d "$i/X11/bitmaps"; then
        bitmapdirs="$i/X11/bitmaps:$bitmapdirs"
      fi
    done
    bitmapdirs=`echo "$bitmapdirs" | sed s/.$//`
  fi
  test ! -z "$bitmapdirs" && AC_DEFINE_UNQUOTED(BITMAPDIR, "$bitmapdirs")

  dnl Autodetect defines extracted from X config by xmkmf, e.g. NARROWPROTO
  AC_CHECKING(for X defines extracted by xmkmf)
  rm -fr conftestdir
  if mkdir conftestdir; then
    cd conftestdir
    cat > Imakefile <<'EOF'
xetest:
        @echo ${PROTO_DEFINES} ${STD_DEFINES}
EOF
    if (xmkmf) >/dev/null 2>/dev/null && test -f Makefile; then
      # GNU make sometimes prints "make[1]: Entering...", which would confuse us.
      xmkmf_defines=`${MAKE-make} xetest 2>/dev/null | grep -v make`
    fi
    cd ..
    rm -fr conftestdir
    for word in $xmkmf_defines; do
      case "$word" in 
      -D__STDC__*) ;;
      -D* )
        sym=`echo '' $word | sed -e 's:^ *-D::' -e 's:=.*::'`
        case "$word" in
          -D*=* ) val=`echo '' $word | sed -e 's:^.*=::'` ;;
          *     ) val=1 ;;
        esac
dnl Avoid re-AC_DEFINE-ing xmkmf symbols we've already defined above.
        if grep "^#define $sym " confdefs.h >/dev/null; then :; else
          if test "$val" = "1"
            then AC_DEFINE_UNQUOTED($sym)
            else AC_DEFINE_UNQUOTED($sym,$val)
          fi
        fi  ;;
      esac
    done
  fi

  dnl make sure we can find Intrinsic.h
  AC_CHECK_HEADER(X11/Intrinsic.h, ,
   [AC_MSG_ERROR("Unable to find X11 header files.")])

  dnl -lXt and -lX11 are required
  dnl Some broken systems require the magic "-b i486-linuxaout" flag
  AC_CHECK_LIB(X11, XOpenDisplay, have_lib_x11=yes)
  if test "$have_lib_x11" != "yes"; then
    AC_CHECK_LIB(X11, XGetFontProperty,
      ld_switch_x_site="-b i486-linuxaout $ld_switch_x_site",
      [AC_MSG_ERROR("Unable to find X11 libraries.")],
      -b i486-linuxaout)
  fi
  libs_x="-lX11"
  test "$extra_verbose" = "yes" && echo "    Setting libs_x to \"-lX11\""

  dnl Autodetect -lXext
  AC_CHECK_LIB(Xext, XShapeSelectInput, XE_PREPEND(-lXext, libs_x))

  dnl Require -lXt
  AC_CHECK_LIB(Xt, XtOpenDisplay, XE_PREPEND(-lXt, libs_x),
    AC_MSG_ERROR("Unable to find X11 libraries."))

  AC_MSG_CHECKING(the version of X11 being used)
  AC_TRY_RUN([#include <X11/Intrinsic.h>
    int main(int c, char *v[]) { return c>1 ? XlibSpecificationRelease : 0; }],
    [./conftest foobar; x11_release=$?],[x11_release=4],[x11_release=4])
  AC_MSG_RESULT(R${x11_release})
  AC_DEFINE_UNQUOTED(THIS_IS_X11R${x11_release})

  if test "${x11_release}" = "4"; then
    case "$with_widgets" in
      "" | "no") with_widgets=no ;;
      *) XE_DIE("Widget support requires X11R5 or greater") ;;
    esac
  fi

  AC_CHECK_FUNCS(XConvertCase)

  AC_CHECK_HEADERS(X11/Xlocale.h)

  dnl XFree86 has a non-standard prototype for this X11R6 function
  AC_CHECK_FUNCS(XRegisterIMInstantiateCallback)
  AC_MSG_CHECKING(for standard XRegisterIMInstantiateCallback prototype)
  AC_TRY_COMPILE([
#define NeedFunctionPrototypes 1
#include <X11/Xlib.h>
extern Bool XRegisterIMInstantiateCallback(
   Display*, struct _XrmHashBucketRec*, char*, char*, XIMProc, XPointer*);
], [], 
  [AC_MSG_RESULT(yes)],
  [AC_MSG_RESULT(no)
   AC_DEFINE(XREGISTERIMINSTANTIATECALLBACK_NONSTANDARD_PROTOTYPE)])

  dnl autodetect -lXmu
  test -z "$with_xmu" && { AC_CHECK_LIB(Xmu, XmuReadBitmapDataFromFile,
                           with_xmu=yes, with_xmu=no) }
  if test "$with_xmu" = "no"; then
    XE_ADD_OBJS(xmu.o)
  else
    XE_PREPEND(-lXmu, libs_x)
    AC_DEFINE(HAVE_XMU)
  fi

  dnl Autodetect -lXbsd
  dnl #### Someone, please add a better function than main
  AC_CHECK_LIB(Xbsd, main, XE_PREPEND(-lXbsd, libs_x))

  dnl Problem with the MIT distribution of X on AIX
  if test "$unexec" = "unexaix.o" -a "$x11_release" = "6"; then
    dnl X11R6 requires thread-safe code on AIX for some reason
    if test "$GCC" = "yes"; then
      dnl gcc changed the name of the `-mthreads' option to `-pthread'
      dnl on 2000-06-12
      AC_MSG_CHECKING(for name of AIX gcc threads option)
      case `$CC -v --help 2>&1` in
        *-mthreads*) aix_threads=-mthreads ;;
                  *) aix_threads=-pthread  ;;
      esac
      AC_MSG_RESULT($aix_threads)
      XE_PREPEND($aix_threads, X_CFLAGS)
      XE_PREPEND($aix_threads, libs_x)
    else
      dnl Try to use the thread-safe "_r" versions of xlc
      case "$CC" in *_r) : ;;
        *)
         xe_save_CC="$CC"
         CC="${CC}_r"
         AC_CHECK_SIZEOF(short)
         test "$ac_cv_sizeof_short" = 0 && CC="$xe_save_CC" ;;
      esac
    fi
  fi

fi dnl $with_x11 = yes

if test "$with_msw" != "no"; then
  AC_CHECKING(for MS-Windows)
  AC_CHECK_LIB(gdi32,main,with_msw=yes)
  if test "$with_msw" = "yes"; then
    AC_DEFINE(HAVE_MS_WINDOWS)

    dnl The net installer only works with MS-Windows currently
    if test "$with_netinstall" = "yes"; then
      XE_APPEND(netinstall, MAKE_SUBDIR)
      XE_APPEND(netinstall, SRC_SUBDIR_DEPS)
      XE_APPEND(netinstall, INSTALL_ARCH_DEP_SUBDIR)
    fi

    install_pp="$blddir/lib-src/installexe.sh"
    XE_APPEND(-lshell32 -lgdi32 -luser32 -lcomdlg32 -lcomctl32 -lkernel32 -lwinspool, libs_system)
    test "$with_dragndrop" != no && XE_APPEND(msw, dragndrop_proto)
    if test "$window_system" != x11; then
        window_system=msw
        test "$with_scrollbars" != "no" && with_scrollbars=msw \
            && XE_ADD_OBJS(scrollbar-msw.o)
        test "$with_menubars"   != "no" && with_menubars=msw \
            && XE_ADD_OBJS(menubar-msw.o)
        test "$with_toolbars"   != "no" && with_toolbars=msw \
            && XE_ADD_OBJS(toolbar-msw.o)
        test "$with_dialogs"   != "no" && with_dialogs=msw \
            && XE_ADD_OBJS(dialog-msw.o)
        test "$with_widgets"   != "no" && with_widgets=msw
    else
        test "$with_scrollbars" != "no" && XE_ADD_OBJS(scrollbar-msw.o)
        test "$with_menubars"   != "no" && XE_ADD_OBJS(menubar-msw.o)
        test "$with_toolbars"   != "no" && XE_ADD_OBJS(toolbar-msw.o)
        test "$with_dialogs"    != "no" && XE_ADD_OBJS(dialog-msw.o)
    fi
    dnl check for our special version of select
    AC_TRY_RUN([#include <fcntl.h>
    int main() { return (open("/dev/windows", O_RDONLY, 0) > 0)? 0 : 1; }],
    [need_event_unixoid=yes; AC_DEFINE(HAVE_MSG_SELECT)])
    with_file_coding=yes
    XE_ADD_OBJS(console-msw.o device-msw.o event-msw.o frame-msw.o objects-msw.o select-msw.o redisplay-msw.o glyphs-msw.o gui-msw.o)
  fi
fi

AC_SUBST(install_pp)

test -z "$window_system" && window_system="none"

dnl Test for features that require a window system - ANY window system
if test "$window_system" = "none"; then
  for feature in menubars scrollbars toolbars dialogs dragndrop xface
  do
    if eval "test -n \"\$with_${feature}\" -a \"\$with_${feature}\" != no" ; then
       AC_MSG_WARN([--with-$feature ignored:  Not valid without window system support])
    fi
    eval "with_${feature}=no"
  done
else
  test -z "$with_toolbars" && with_toolbars=yes
fi

dnl ### Test for features that require mswindows support - currently none
dnl ### MS-Windows folks: add code here..... (martin)
if test "$with_msw" != "yes"; then
  for feature in   MARTIN_IS_CLUELESS_ABOUT_MSW_FEATURES
  do
    if eval "test -n \"\$with_${feature}\" -a \"\$with_${feature}\" != no" ; then
       AC_MSG_WARN([--with-$feature ignored:  Not valid without MS-Windows support])
    fi
    eval "with_${feature}=no"
  done
else
  :
fi

dnl Test for features that require X11 support
if test "$with_x11" != "yes"; then
  dnl It ought to be reasonable to have no output device at all, and only use
  dnl XEmacs in --batch mode.
  dnl if test "$with_tty" = "no" ; then
  dnl   AC_MSG_ERROR([No window system support and no TTY support - Unable to proceed.])
  dnl fi
  for feature in tooltalk cde offix wmcommand xim xmu nas_sound
  do
    if eval "test -n \"\$with_${feature}\" -a \"\$with_${feature}\" != no" ; then
       AC_MSG_WARN([--with-$feature ignored:  Not valid without X support])
    fi
    eval "with_${feature}=no"
  done
fi

dnl Balloon Help requires the Shape extension, not available everywhere,
dnl for example not on AIX 4.3.
if test "$with_x11" = "yes"; then
  AC_CHECK_HEADER(X11/extensions/shape.h, [
   AC_DEFINE(HAVE_BALLOON_HELP)
   XE_ADD_OBJS(balloon_help.o balloon-x.o)])
fi

dnl FSF 19.29 has some bitmapdir stuff here.
bitmapdir=

case "$window_system" in
  x11  ) HAVE_X_WINDOWS=yes; echo "  Using X11." ;;
  msw  ) HAVE_X_WINDOWS=no ; echo "  Using MS-Windows." ;;
  gtk  )
       HAVE_X_WINDOWS=no
       test "$with_gnome" = "yes" && echo "  Using GNOME."
       test "$with_gnome" = "no" && echo "  Using GTK."
       ;;
  none ) HAVE_X_WINDOWS=no ; echo "  Using no window system." ;;
esac

case "$x_libraries" in *X11R4* )
  test "$opsys" = "hpux9"     && opsysfile="s/hpux9-x11r4.h"
  test "$opsys" = "hpux9-shr" && opsysfile="s/hpux9shxr4.h"
esac

dnl Enable or disable proper handling of WM_COMMAND
AC_CHECKING(for WM_COMMAND option);
dnl if test "$with_wmcommand" = "yes"; then
if test "$with_wmcommand" != "no"; then
  AC_DEFINE(HAVE_WMCOMMAND)
fi

dnl Autodetect Xauth
dnl -lXau is only used by gnuclient, so use a special variable for Xauth X libs
test -z "$with_xauth" && test "$window_system" = "none" && with_xauth=no
test -z "$with_xauth" && { AC_CHECK_HEADER(X11/Xauth.h,          ,with_xauth=no) }
test -z "$with_xauth" && { AC_CHECK_LIB(Xau, XauGetAuthByAddr,[:],with_xauth=no) }
test -z "$with_xauth" && with_xauth=yes
if test "$with_xauth" = "yes"; then
  AC_DEFINE(HAVE_XAUTH)
  XE_SPACE(libs_xauth, $GTK_LIBS $X_EXTRA_LIBS -lXau $libs_x $X_PRE_LIBS)
fi
AC_SUBST(libs_xauth)

dnl This one is for the static initializeds variables in
dnl offix.c, so that the thing is dumped after lastfile.o
AC_SUBST(dnd_objs)

dnl Autodetect tooltalk
if test "$with_tooltalk" != "no" ; then
  dnl autodetect the location of tt_c.h
  dnl tt_c.h might be in Tt or desktop include directories
  for dir in "" "Tt/" "desktop/" ; do
    AC_CHECK_HEADER(${dir}tt_c.h, tt_c_h_file="${dir}tt_c.h"; break)
  done
  if test -z "$tt_c_h_file"; then
    if test "$with_tooltalk" = "yes"; then
      USAGE_ERROR("Unable to find required tooltalk header files.")
    fi
    with_tooltalk=no
  fi
fi
if test "$with_tooltalk" != "no" ; then
  for extra_libs in "" "-lI18N -lce" "-lcxx"; do
    AC_CHECK_LIB(tt, tt_message_create,
      tt_libs="-ltt $extra_libs"; break, [:],$extra_libs)
  done
  if test -z "$tt_libs"; then
    if test "$with_tooltalk" = "yes"; then
      USAGE_ERROR("Unable to find required tooltalk libraries.")
    fi
    with_tooltalk=no
  fi
fi
test -z "$with_tooltalk" && with_tooltalk=yes
if test "$with_tooltalk" = "yes"; then
  AC_DEFINE(TOOLTALK)
  AC_DEFINE_UNQUOTED(TT_C_H_FILE, "$tt_c_h_file")
  XE_PREPEND($tt_libs, libs_x)
  XE_ADD_OBJS(tooltalk.o)
fi

dnl Autodetect CDE
test -z "$with_cde" && { AC_CHECK_HEADER(Dt/Dt.h,               , with_cde=no) }
test -z "$with_cde" && { AC_CHECK_LIB(DtSvc, DtDndDragStart, [:], with_cde=no) }
test -z "$with_cde" && with_cde=yes
if test "$with_dragndrop" = no; then
  AC_MSG_WARN([No CDE without generic Drag'n'Drop support])
  with_cde=no
fi
if test "$with_cde" = "yes" ; then
  AC_DEFINE(HAVE_CDE)
  XE_PREPEND(-lDtSvc, libs_x)
  XE_APPEND(CDE, dragndrop_proto)
  with_tooltalk=yes # CDE requires Tooltalk
  need_motif=yes    # CDE requires Motif
fi

dnl Always compile OffiX unless --without-offix is given, no
dnl X11 support is compiled in, no standard Xmu is available,
dnl or dragndrop support is disabled
dnl Because OffiX support currently loses when more than one display
dnl is in use, we now disable it by default -slb 07/10/1998.
test "$window_system" != "x11" && with_offix=no
if test "$with_xmu" != yes -a "$with_x11" = yes; then
  AC_MSG_WARN([No OffiX without real Xmu support])
  with_offix=no
fi
if test "$with_dragndrop" = no; then
  AC_MSG_WARN([No OffiX without generic Drag'n'Drop support])
  with_offix=no
fi
if test "$with_cde" = yes; then
  AC_MSG_WARN([CDE already found, disabling OffiX support])
  with_offix=no
fi
test -z "$with_offix" && with_offix=no
if test "$with_offix" = "yes"; then
  AC_DEFINE(HAVE_OFFIX_DND)
  XE_APPEND(offix.o, dnd_objs)
  XE_APPEND(OffiX, dragndrop_proto)
fi
if test "$with_gtk" = "yes"; then
   XE_APPEND(GTK, dragndrop_proto)
fi

dnl Autodetect Drag'n'Drop support
dnl always included if CDE, Offix, or MSWindows are defined
if test "$with_dragndrop" != "no" ; then
  AC_MSG_CHECKING(if drag and drop API is needed)
  if test -n "$dragndrop_proto" ; then
    with_dragndrop=yes
    AC_MSG_RESULT([yes (${dragndrop_proto} )])
    AC_DEFINE(HAVE_DRAGNDROP)
    XE_APPEND(dragdrop.o, extra_objs)
  else
    with_dragndrop=no
    AC_MSG_RESULT(no)
  fi
fi

dnl Autodetect LDAP
AC_CHECKING(for LDAP)
test -z "$with_ldap" && { AC_CHECK_HEADER(ldap.h, ,with_ldap=no) }
test -z "$with_ldap" && { AC_CHECK_HEADER(lber.h, ,with_ldap=no) }
if test "$with_ldap" != "no"; then
  AC_CHECK_LIB(ldap, ldap_search, with_ldap_nolber=yes, with_ldap_nolber=no)
  test "$with_ldap_nolber" = "no" && { AC_CHECK_LIB(ldap, ldap_open, with_ldap_lber=yes, with_ldap_lber=no, -llber) }
  test "$with_ldap_nolber" = "no" -a "$with_ldap_lber" = "no" && { AC_CHECK_LIB(ldap, ldap_open, with_ldap_krb=yes, with_ldap_krb=no, -llber -lkrb) }
  test "$with_ldap_nolber" = "no" -a "$with_ldap_lber" = "no" -a "$with_ldap_krb" = "no" && { AC_CHECK_LIB(ldap, ldap_open, with_ldap_krbdes=yes, with_ldap_krbdes=no, -llber -lkrb -ldes) }
  test -z "$with_ldap" -a \( "$with_ldap_lber" = "yes" -o "$with_ldap_nolber" = "yes" -o "$with_ldap_krb" = "yes" -o "$with_ldap_krbdes" = "yes" \) && with_ldap=yes
fi
if test "$with_ldap" = "yes"; then
  AC_DEFINE(HAVE_LDAP)
  XE_ADD_OBJS(eldap.o)
  if test "$with_ldap_nolber" = "yes" ; then
    XE_PREPEND(-lldap, LIBS)
  else
    if test "$with_ldap_krb" = "yes" ; then
      XE_PREPEND(-lkrb, LIBS)
    fi
    if test "$with_ldap_krbdes" = "yes" ; then
      XE_PREPEND(-ldes, LIBS)
      XE_PREPEND(-lkrb, LIBS)
    fi
    XE_PREPEND(-llber, LIBS)
    XE_PREPEND(-lldap, LIBS)
  fi
  AC_CHECK_FUNCS(ldap_set_option ldap_get_lderrno ldap_result2error ldap_parse_result)
fi

dnl Autodetect PostgreSQL
dnl On many Linux systems, PostgreSQL is packaged to be installed in /usr;
dnl in this case, configure will easily detect it there.
dnl
dnl If PostgreSQL is installed into a different prefix,
dnl (such as the default /usr/local/pgsql when building from source),
dnl that prefix must be specified using the --site-prefixes flag.
if test "$with_postgresql" != "no"; then
  AC_CHECKING(for PostgreSQL)

dnl Look for these standard header file locations, known to be used on Linux
  for header_dir in "" "pgsql/" "postgresql/"; do
    AC_CHECK_HEADER(${header_dir}libpq-fe.h,
                    libpq_fe_h_file=${header_dir}libpq-fe.h; break)
  done

  test -n "$libpq_fe_h_file" && { AC_CHECK_LIB(pq,PQconnectdb,have_libpq=yes) }

  if test -n "$libpq_fe_h_file" -a "$have_libpq" = "yes"; then
    with_postgresql=yes
    AC_DEFINE(HAVE_POSTGRESQL)
    AC_CHECK_LIB(pq,PQconnectStart, [
                 with_postgresqlv7=yes;
                 AC_DEFINE(HAVE_POSTGRESQLV7)])
    AC_DEFINE_UNQUOTED(LIBPQ_FE_H_FILE, "$libpq_fe_h_file")
    XE_PREPEND(-lpq, LIBS)
    XE_ADD_OBJS(postgresql.o)
  elif test "$with_postgresql" = "yes"; then
    XE_DIE("Required PostgreSQL support cannot be provided.  Check --site-prefixes.")
  fi
fi

dnl ----------------------
dnl Graphics libraries
dnl ----------------------

if test "$window_system" != "none"; then
  AC_CHECKING(for graphics libraries)

  dnl add special code to handle xpm-nox on Cygwin (csw)
  dnl   -- should only happen if CYGWIN && WITH_XPM && WITH_MSW && !WITH_X
  libpath_xpm=
  incpath_xpm=
  case "$opsys" in 
    cygwin*)
      cygwin_top=`eval "gcc -print-file-name=libc.a"` ;
      cygwin_top=`eval "dirname ${cygwin_top}"`;
      cygwin_top="${cygwin_top}/..";
      case "$window_system" in
        dnl use "standard" search pattern
        x11)  ;;
        dnl hardcode "standard" non-X11 xpm lib/inc dirs
        msw) libpath_xpm="-L${cygwin_top}/lib/noX"
             incpath_xpm="-I${cygwin_top}/include/noX"
              ;;
        dnl not supported on cygwin (yet?)
        gtk)  ;;
        dnl probably not reached...
        none) ;;
        dnl ditto
        *)    ;;
      esac
      ;;
    dnl use "standard" search pattern for all other OS's
    *) ;;
  esac
  dnl Autodetect Xpm
  xpm_problem=""
  if test -z "$with_xpm"; then
    XE_PREPEND("$incpath_xpm", CFLAGS)
    XE_PREPEND("$libpath_xpm", LDFLAGS)
    AC_MSG_CHECKING(for Xpm - no older than 3.4f)
    xe_check_libs=-lXpm
    AC_TRY_RUN([#define XPM_NUMBERS
#include <X11/xpm.h>
    int main(int c, char **v) {
    return c == 1 ? 0 :
      XpmIncludeVersion != XpmLibraryVersion() ? 1 :
      XpmIncludeVersion < 30406 ? 2 : 0 ;}],
    [./conftest dummy_arg; xpm_status=$?;
      if test "$xpm_status" = "0"; then
        with_xpm=yes;
      else
        with_xpm=no;
        if test "$xpm_status" = "1"; then
          xpm_problem="Xpm library version and header file version don't match!"
        elif test "$xpm_status" = "2"; then
          xpm_problem="Xpm library version is too old!"
        else
          xpm_problem="Internal xpm detection logic error!"
        fi
        echo "
*** WARNING *** $xpm_problem
  I'm not touching that with a 10-foot pole!
  If you really want to use the installed version of Xpm, rerun
  configure and add '--with-xpm=yes', but don't blame me if XEmacs crashes!"
    fi],
    [with_xpm=no])
    xe_check_libs=
    AC_MSG_RESULT($with_xpm)
  fi
  if test "$with_xpm" = "yes"; then
    dnl #### This code assumes that if AC_CHECK_LIB fails,
    dnl #### then it will succeed if FOR_MSW is defined,
    dnl #### but doesn't actually verify this assumption.
    AC_DEFINE(HAVE_XPM)
    XE_PREPEND("$libpath_xpm", LDFLAGS)
    XE_PREPEND(-lXpm, libs_x)
    XE_PREPEND("$incpath_xpm", CFLAGS)
    AC_MSG_CHECKING(for \"FOR_MSW\" xpm)
    xe_check_libs=-lXpm
    AC_TRY_LINK(, [XpmCreatePixmapFromData()],
    [xpm_for_msw=no],
    [xpm_for_msw=yes])
    xe_check_libs=
    AC_MSG_RESULT($xpm_for_msw)
    if test "$xpm_for_msw" = "yes"; then
      AC_DEFINE(FOR_MSW)
    fi
  fi

  dnl Autodetect XFACE
  test -z "$with_xface" && { AC_CHECK_HEADER(compface.h,          ,with_xface=no) }
  test -z "$with_xface" && { AC_CHECK_LIB(compface, UnGenFace,[:] ,with_xface=no) }
  test -z "$with_xface" && with_xface=yes
  if test "$with_xface" = "yes"; then
    AC_DEFINE(HAVE_XFACE)
    XE_PREPEND(-lcompface, libs_x)
  fi

  dnl For a brief period we had the GIF code split out into a separate library,
  dnl but patent problems, etc. sort of squashed that idea.
  dnl We default to building with builtin GIF decoding
  if test "$with_gif" != "no"; then
    with_gif="yes"
    AC_DEFINE(HAVE_GIF)
    XE_ADD_OBJS(dgif_lib.o gif_io.o)
  fi

  dnl Too many stupid linkers can't detect cascaded lib dependencies until runtime
  dnl So we always search for libz compression support.
  if test "$with_png $with_tiff" != "no no"; then
    AC_CHECK_LIB(c,  inflate, [:], [
    AC_CHECK_LIB(z,  inflate, [XE_PREPEND(-lz,  libs_x)],[
    AC_CHECK_LIB(gz, inflate, [XE_PREPEND(-lgz, libs_x)])])])
  fi

  dnl autodetect JPEG
  test -z "$with_jpeg" && { AC_CHECK_HEADER(jpeglib.h,                    ,with_jpeg=no) }
  test -z "$with_jpeg" && { AC_CHECK_LIB(jpeg, jpeg_destroy_decompress,[:],with_jpeg=no) }
  test -z "$with_jpeg" && with_jpeg=yes
  if test "$with_jpeg" = "yes"; then
    AC_DEFINE(HAVE_JPEG)
    XE_PREPEND(-ljpeg, libs_x)
  fi

  dnl autodetect PNG
  png_problem=""
  test -z "$with_png" && { AC_CHECK_FUNC(pow,                  ,with_png=no) }
  test -z "$with_png" && { AC_CHECK_HEADER(png.h,              ,with_png=no) }
  test -z "$with_png" && { AC_CHECK_LIB(png, png_read_image,[:],with_png=no) }
  if test -z "$with_png"; then
    AC_MSG_CHECKING(for workable png version information)
    xe_check_libs="-lpng -lz"
    AC_TRY_RUN([#include <png.h>
    int main(int c, char **v) {
    if (c == 1) return 0;
    if (strcmp(png_libpng_ver, PNG_LIBPNG_VER_STRING) != 0) return 1;
    return (PNG_LIBPNG_VER < 10002) ? 2 : 0 ;}],
    [./conftest dummy_arg; png_status=$?;
      if test "$png_status" = "0"; then
        with_png=yes;
      else
        with_png=no;
        if test "$png_status" = "1"; then
          png_problem="PNG library version and header file don't match!"
        elif test "$png_status" = "2"; then
          png_problem="PNG library version too old (pre 1.0.2)!"
        fi
        echo "
*** WARNING *** $png_problem
  I'm not touching that with a 10-foot pole!
  If you really want to use the installed version of libPNG, rerun
  configure and add '--with-png=yes', but don't blame me if XEmacs crashes!"
    fi],
    [with_png=no])
    xe_check_libs=
    AC_MSG_RESULT($with_png)
  fi
  if test "$with_png" = "yes"; then
    AC_DEFINE(HAVE_PNG)
    XE_PREPEND(-lpng, libs_x)
  fi

  dnl autodetect TIFF
  test -z "$with_tiff" && { AC_CHECK_HEADER(tiffio.h,            ,with_tiff=no) }
  test -z "$with_tiff" && { AC_CHECK_LIB(tiff, TIFFClientOpen,[:],with_tiff=no) }
  test -z "$with_tiff" && with_tiff=yes
  if test "$with_tiff" = "yes"; then
    AC_DEFINE(HAVE_TIFF)
    XE_PREPEND(-ltiff, libs_x)
  fi
fi

dnl ----------------------
dnl GTK-Specific Graphics libraries
dnl ----------------------

if test "$with_gtk" = "yes"; then
  dnl Autodetect XFACE
  test -z "$with_xface" && { AC_CHECK_HEADER(compface.h,          ,with_xface=no) }
  test -z "$with_xface" && { AC_CHECK_LIB(compface, UnGenFace,[:] ,with_xface=no) }
  test -z "$with_xface" && with_xface=yes
  if test "$with_xface" = "yes"; then
    AC_DEFINE(HAVE_XFACE)
    XE_PREPEND(-lcompface, libs_gtk)
  fi
fi


dnl ----------------------
dnl X-Specific Graphics libraries
dnl ----------------------

if test "$with_x11" = "yes"; then
  AC_CHECKING(for X11 graphics libraries)
fi

if test "$with_x11" = "yes"; then
  AC_CHECKING(for the Athena widgets)

  dnl What in heck did the user actually want?
  case "$with_athena" in
    dnl This is the default, old fashioned flat Athena.
    "xaw" | "") athena_variant=Xaw      athena_3d=no  ;;
    "3d")       athena_variant=Xaw3d    athena_3d=yes ;;
    "next")     athena_variant=neXtaw   athena_3d=yes ;;
    "95")       athena_variant=Xaw95    athena_3d=yes ;;
    "xpm")      athena_variant=XawXpm   athena_3d=yes ;;
    *)          XE_DIE("Unknown Athena widget set \`$with_athena'. This should not happen.") ;;
  esac

  athena_3d_function=Xaw3dComputeBottomShadowRGB

  dnl Search for the Athena library...
  if test "$athena_3d" = "no"; then
    AC_CHECK_LIB($athena_variant, XawScrollbarSetThumb,
      [
        dnl Must not be a 3d library...
        AC_CHECK_LIB($athena_variant, $athena_3d_function,
          AC_MSG_WARN("Could not find a non-3d Athena widget library."),
          athena_lib=$athena_variant)
      ],
      AC_MSG_WARN("Could not find an Athena widget library."))
  else
    dnl The real configuration, need 3d library
    AC_CHECK_LIB($athena_variant, $athena_3d_function, athena_lib=$athena_variant,
      dnl OK, couldn't find it with a proper name, try the standard Athena lib
      dnl If that is 3d, presume the user asked for what they have installed.
      AC_CHECK_LIB(Xaw, $athena_3d_function,
        [
          athena_lib=Xaw;
          AC_MSG_WARN("Assuming that libXaw is actually $athena_variant.");
        ],
        AC_MSG_WARN("Could not find a 3d Athena widget library that looked like $athena_variant.")))
  fi

  dnl Now we locate the Athena headers that we need.
  if test "$athena_3d" = "no"; then
    AC_CHECK_HEADER(X11/Xaw/ThreeD.h,
      AC_MSG_WARN("Could not find a non-3d Athena header set."),
      AC_CHECK_HEADER(X11/Xaw/XawInit.h,
        athena_h_path=X11/Xaw,
        AC_MSG_WARN("Could not find a non-3d Athena header set.")))
  else
    dnl The three-d Athena headers are so much more slippery.
    dnl Curse this `Lets replace standard libraries' thing that they did. :/
    AC_CHECK_HEADER(X11/$athena_variant/XawInit.h,
      AC_CHECK_HEADER(X11/$athena_variant/ThreeD.h,
        athena_h_path=X11/$athena_variant,))

    dnl Is the variant specific header directory directly under include?
    if test -z "$athena_h_path"; then
      AC_CHECK_HEADER($athena_variant/XawInit.h,
        AC_CHECK_HEADER($athena_variant/ThreeD.h,
          athena_h_path=$athena_variant,))
    fi

    dnl If we couldn't find the specific variant, try the generic Athena 3d headers
    if test -z "$athena_h_path" -a "$athena_variant" != "Xaw3d"; then
      AC_CHECK_HEADER(X11/Xaw3d/XawInit.h,
        AC_CHECK_HEADER(X11/Xaw3d/ThreeD.h,
          [
            AC_MSG_WARN("Assuming that X11/Xaw3d headers are suitable for $athena_variant.")
            athena_h_path=X11/Xaw3d
          ],))
    fi

    dnl Also generic 3d headers directly under include dir
    if test -z "$athena_h_path" -a "$athena_variant" != "Xaw3d"; then
      AC_CHECK_HEADER(Xaw3d/XawInit.h,
        AC_CHECK_HEADER(Xaw3d/ThreeD.h,
          [
            AC_MSG_WARN("Assuming that Xaw3d headers are suitable for $athena_variant.")
            athena_h_path=Xaw3d
          ],))
    fi

    dnl If nothing yet found, see if Xaw is a 3d header set...
    dnl We AC_MSG_WARN if we fail because I am all out of ideas...
    if test -z "$athena_h_path"; then
      AC_CHECK_HEADER(X11/Xaw/ThreeD.h,
        [
          AC_MSG_WARN("Assuming that X11/Xaw headers are suitable for $athena_variant.")
          athena_h_path=X11/Xaw
        ],
        AC_MSG_WARN("Could not find a suitable 3d Athena header set."))
    fi
  fi

  dnl Do we actually have a usable Athena widget set? Please?
  if test -n "$athena_lib" -a -n "$athena_h_path"; then
    have_xaw=yes
  else
    have_xaw=no
  fi

else
  have_xaw=no
fi dnl "$with_x11" = "yes"

if test "$with_x11" = "yes"; then
  dnl autodetect Motif - but only add to libs_x later (if necessary)
  AC_CHECK_HEADER(Xm/Xm.h,
   [AC_CHECK_LIB(Xm, XmStringFree, have_motif=yes, have_motif=no)],
   have_motif=no)

  if test "$have_motif" = "yes"; then
    dnl autodetect lesstif
    AC_MSG_CHECKING(for Lesstif)
    AC_EGREP_CPP(yes,
[#include <Xm/Xm.h>
#ifdef LESSTIF_VERSION
yes
#endif
], have_lesstif=yes, have_lesstif=no)
  AC_MSG_RESULT($have_lesstif)
  fi

fi dnl "$with_x11" = "yes"

dnl Finish ensuring that we have values for the various toolkit items.
dnl Not all toolkits support all widgets
dnl if Motif is available we use it for the dialog boxes.

case "$with_menubars" in "" | "yes" | "athena" )
  with_menubars="lucid" ;;
esac
case "$with_dialogs" in "" | "yes" | "lucid" )
  if   test "$have_motif"     = "yes"; then with_dialogs="motif"
  elif test "$have_xaw"       = "yes"; then with_dialogs="athena"
  else with_dialogs=no
  fi ;;
esac
case "$with_scrollbars" in "" | "yes" )
  with_scrollbars="lucid" ;;
esac
case "$with_widgets" in
  "yes" | "lucid")
    if   test "$have_motif" = "yes"; then with_widgets="motif"
    elif test "$have_xaw"   = "yes"; then with_widgets="athena"
    else with_widgets=no
    fi ;;
  "" )
    with_widgets=no ;;
esac

all_widgets="$with_menubars $with_scrollbars $with_dialogs $with_toolbars $with_widgets"

case "$all_widgets" in
  *athena* )
    if test "$have_xaw" != "yes"; then
      XE_DIE("Could not find a suitable Athena library to build with.")
    fi

    dnl Add the Lucid widget Athena code
    XE_APPEND(lwlib-Xaw.o, lwlib_objs)

    dnl Add the Athena widget library we located earlier
    XE_PREPEND(-l$athena_lib, libs_x)

    dnl Tell lwlib where to find the Athena header files.
    dnl Many people have tried to create a `smart' way of doing this,
    dnl but all have failed.  Before changing the following ugly definitions,
    dnl consult the veterans of many a battle.
    AC_DEFINE_UNQUOTED(ATHENA_Scrollbar_h_,"$athena_h_path/Scrollbar.h")
    AC_DEFINE_UNQUOTED(ATHENA_Dialog_h_,"$athena_h_path/Dialog.h")
    AC_DEFINE_UNQUOTED(ATHENA_Form_h_,"$athena_h_path/Form.h")
    AC_DEFINE_UNQUOTED(ATHENA_Command_h_,"$athena_h_path/Command.h")
    AC_DEFINE_UNQUOTED(ATHENA_Label_h_,"$athena_h_path/Label.h")
    AC_DEFINE_UNQUOTED(ATHENA_LabelP_h_,"$athena_h_path/LabelP.h")
    AC_DEFINE_UNQUOTED(ATHENA_Toggle_h_,"$athena_h_path/Toggle.h")
    AC_DEFINE_UNQUOTED(ATHENA_ToggleP_h_,"$athena_h_path/ToggleP.h")
    AC_DEFINE_UNQUOTED(ATHENA_AsciiText_h_,"$athena_h_path/AsciiText.h")
    AC_DEFINE_UNQUOTED(ATHENA_XawInit_h_,"$athena_h_path/XawInit.h")

    AC_DEFINE(LWLIB_USES_ATHENA)
    AC_DEFINE(NEED_ATHENA)
    need_athena="yes"

    if test "$athena_3d" = "yes"; then
      AC_DEFINE(HAVE_ATHENA_3D)
    fi
  ;;
esac

case "$all_widgets" in *motif* )
  AC_DEFINE(LWLIB_USES_MOTIF)
  AC_DEFINE(NEED_MOTIF)
  XE_APPEND(lwlib-Xm.o, lwlib_objs)
  need_motif=yes ;;
esac

test "$with_menubars"   = "lucid" && XE_APPEND(xlwmenu.o, lwlib_objs)
test "$with_menubars"   = "motif" && XE_APPEND(xlwmenu.o, lwlib_objs)
test "$with_scrollbars" = "lucid" && XE_APPEND(xlwscrollbar.o, lwlib_objs)
test "$with_widgets"   != "no" && test "$with_widgets" != "msw" && \
        XE_APPEND(xlwtabs.o xlwgcs.o, lwlib_objs)
case "$with_widgets" in athena* )
        XE_APPEND(xlwradio.o xlwcheckbox.o xlwgauge.o, lwlib_objs);;
esac
case "$all_widgets" in *lucid* )
  AC_DEFINE(NEED_LUCID)
  XE_APPEND(lwlib-Xlw.o, lwlib_objs) ;;
esac

AC_SUBST(lwlib_objs)

test "$with_scrollbars" = "athena" && AC_DEFINE(LWLIB_SCROLLBARS_ATHENA)
test "$with_dialogs"    = "athena" && AC_DEFINE(LWLIB_DIALOGS_ATHENA)

if test "$athena_3d" = "yes"; then
  test "$with_scrollbars" = "athena" && AC_DEFINE(LWLIB_SCROLLBARS_ATHENA3D)
  test "$with_dialogs"    = "athena" && AC_DEFINE(LWLIB_DIALOGS_ATHENA3D)
fi

case "$with_widgets" in athena* ) AC_DEFINE(LWLIB_WIDGETS_ATHENA);; esac
test "$with_widgets" != "no" && test "$with_widgets" != "msw" && \
        AC_DEFINE(LWLIB_TABS_LUCID)

test "$with_menubars"   != "no"    && AC_DEFINE(HAVE_MENUBARS)
test "$with_scrollbars" != "no"    && AC_DEFINE(HAVE_SCROLLBARS)
test "$with_dialogs"    != "no"    && AC_DEFINE(HAVE_DIALOGS)
test "$with_toolbars"   != "no"    && AC_DEFINE(HAVE_TOOLBARS)
test "$with_widgets"    != "no"    && AC_DEFINE(HAVE_WIDGETS)

test "$with_menubars"   = "lucid"  && AC_DEFINE(LWLIB_MENUBARS_LUCID)
test "$with_scrollbars" = "lucid"  && AC_DEFINE(LWLIB_SCROLLBARS_LUCID)

test "$with_menubars"   = "motif"  && AC_DEFINE(LWLIB_MENUBARS_MOTIF)
test "$with_scrollbars" = "motif"  && AC_DEFINE(LWLIB_SCROLLBARS_MOTIF)
test "$with_dialogs"    = "motif"  && AC_DEFINE(LWLIB_DIALOGS_MOTIF)
test "$with_widgets"    = "motif"  && AC_DEFINE(LWLIB_WIDGETS_MOTIF)

test "$with_menubars"   != "no"    && XE_ADD_OBJS(menubar.o)
test "$with_scrollbars" != "no"    && XE_ADD_OBJS(scrollbar.o)
test "$with_dialogs"    != "no"    && XE_ADD_OBJS(dialog.o)
test "$with_toolbars"   != "no"    && XE_ADD_OBJS(toolbar.o)

if test "$with_gtk" = "yes"; then
  test "$with_menubars"   != "no"      && XE_ADD_OBJS(menubar-gtk.o)
  test "$with_scrollbars" != "no"      && XE_ADD_OBJS(scrollbar-gtk.o)
  test "$with_dialogs"    != "no"      && XE_ADD_OBJS(dialog-gtk.o)
  test "$with_toolbars"   != "no"      && XE_ADD_OBJS(toolbar-gtk.o)
  test "$all_widgets" != "no no no no no" && XE_ADD_OBJS(gui-gtk.o)
fi

if test "$with_x11" = "yes"; then
  test "$with_menubars"   != "no"  && XE_ADD_OBJS(menubar-x.o)
  test "$with_scrollbars" != "no"  && XE_ADD_OBJS(scrollbar-x.o)
  test "$with_dialogs"    != "no"  && XE_ADD_OBJS(dialog-x.o)
  test "$with_toolbars"   != "no"  && XE_ADD_OBJS(toolbar-x.o)
  test "$all_widgets" != "no no no no no" && XE_ADD_OBJS(gui-x.o)
fi

dnl ----------------------
dnl Mule-dependent options
dnl ----------------------

test -z "$with_mule" && with_mule=no
test -z "$with_file_coding" && with_file_coding=no

dnl if test "$with_mule" = "yes" && test ! -d "$srcdir/lisp/mule"; then
dnl     echo "Attempt to Build with Mule without Mule/Lisp"
dnl     echo "Please install the XEmacs/Mule tarball or"
dnl     echo "rerun configure with --with-mule=no"
dnl     exit 1
dnl fi

if test "$with_file_coding" = "yes" && test "$with_mule" = "no"; then
  AC_DEFINE(FILE_CODING)
  XE_ADD_OBJS(file-coding.o)
fi

test -z "$with_chise" && with_chise=yes
if test "$with_chise" = "yes"; then
    with_mule=yes
    with_utf_2000=yes
    with_text_coding=yes
fi

if test "$with_mule" = "yes" ; then
  AC_CHECKING(for Mule-related features)
  AC_DEFINE(MULE)

  dnl Autodetect chise
  chise_includes_found=no
  if test "$with_chise" != "no"; then
    AC_CHECK_HEADER(chise.h, ,with_chise=no)
  fi
  if test "$chise_includes_found" = "no" -a "$with_chise" != "no" -a \
      -d "/usr/local/chise/include"; then
    save_c_switch_site="$c_switch_site"
    c_switch_site="$c_switch_site -I/usr/local/chise/include"
    AC_CHECK_HEADER(chise.h,chise_includes_found=yes)
    if test "$chise_includes_found" != "yes"; then
      c_switch_site="$save_c_switch_site"
      with_chise="no"
    fi
  fi

  test -z "$with_chise" && with_chise=yes
  if test "$with_chise" = "yes"; then
    AC_DEFINE(HAVE_CHISE)
    AC_DEFINE(HAVE_LIBCHISE)
    XE_PREPEND(-lchise, libs_x)
  fi

  AC_DEFINE(FILE_CODING)
  XE_ADD_OBJS(mule.o mule-ccl.o mule-charset.o)
  if test "$with_utf_2000" = "yes" && test "$with_text_coding" = "yes"; then
    AC_DEFINE(TEXT_CODING)
    XE_ADD_OBJS(text-coding.o)
  else
    XE_ADD_OBJS(file-coding.o)
  fi
  dnl Use -lintl to get internationalized strerror for Mule
  AC_CHECK_HEADERS(libintl.h)
  AC_CHECK_LIB(intl, strerror)

  if test "$with_utf_2000" = "yes" ; then
    AC_DEFINE(CHAR_IS_UCS4)
    AC_DEFINE(UTF2000)
    with_wnn=no
    with_wnn6=no
  fi

  AC_CHECKING(for Mule input methods)
  dnl Do we have the XmIm* routines?  And if so, do we want to use them?
  dnl XIM seems to be flaky except on Solaris...
  dnl test -z "$with_xim" -a "$opsys" != "sol2" && with_xim=no
  case "$with_xim" in "" | "yes" )
    AC_CHECKING(for XIM)
    AC_CHECK_LIB(X11, XOpenIM, with_xim=xlib, with_xim=no)
    dnl XIM + Lesstif is not (yet?) usable
    if test "$have_motif $have_lesstif" = "yes no"; then
      AC_CHECK_LIB(Xm, XmImMbLookupString, with_xim=motif)
    fi ;;
  esac
  if test "$with_xim" != "no"; then
    AC_DEFINE(HAVE_XIM)
    if test "$with_xim" = "xlib"; then
      AC_DEFINE(XIM_XLIB)
      XE_ADD_OBJS(input-method-xlib.o)
    fi
    if test "$with_xim" = "motif"; then
      AC_DEFINE(XIM_MOTIF)
      need_motif=yes
      XE_ADD_OBJS(input-method-motif.o)
    fi
    if test "$with_xim" = "motif"; then
      with_xfs=no
    fi
  fi

  dnl "with_xfs" = "yes"
  if test "$with_xfs" = "yes" ; then
    AC_CHECKING(for XFontSet)
    AC_CHECK_LIB(X11, XmbDrawString, [:], with_xfs=no)
    if test "$with_xfs" = "yes" && test "$with_menubars" = "lucid"; then
      AC_DEFINE(USE_XFONTSET)
      if test "$with_xim" = "no" ; then
        XE_ADD_OBJS(input-method-xlib.o)
      fi
    fi
  fi dnl with_xfs

  dnl Autodetect WNN
  test "$with_wnn6" = "yes" && with_wnn=yes # wnn6 implies wnn support
  test -z "$with_wnn" && { AC_CHECK_HEADER(wnn/jllib.h, ,with_wnn=no) }
  dnl gcc 2.97 fixincludes breaks inclusion of wnn/commonhd.h
  test -z "$with_wnn" && { AC_CHECK_HEADER(wnn/commonhd.h, ,with_wnn=no) }
  dnl Detour to find crypt
  if test "$with_wnn" != "no"; then
    AC_CHECK_FUNCS(crypt)
    test "$ac_cv_func_crypt" != "yes" && { AC_CHECK_LIB(crypt, crypt) }
  fi
  dnl Back to our regularly scheduled wnn hunting
  if test -z "$with_wnn" -o "$with_wnn" = "yes"; then
    AC_CHECK_LIB(wnn,jl_dic_list_e,libwnn=wnn,
      AC_CHECK_LIB(wnn4,jl_dic_list_e,libwnn=wnn4,
        AC_CHECK_LIB(wnn6,jl_dic_list_e,libwnn=wnn6,
          AC_CHECK_LIB(wnn6_fromsrc,dic_list_e,libwnn=wnn6_fromsrc,with_wnn=no))))
  fi
  test -z "$with_wnn" && with_wnn=yes
  if test "$with_wnn" = "yes"; then
    AC_DEFINE(HAVE_WNN)
    XE_PREPEND(-l$libwnn, libs_x)
    XE_ADD_OBJS(mule-wnnfns.o)
    if test "$with_wnn6" != "no"; then
      AC_CHECK_LIB($libwnn, jl_fi_dic_list, with_wnn6=yes)
      test "$with_wnn6" = "yes" && AC_DEFINE(WNN6)
    fi
  fi

  dnl Autodetect canna
  canna_includes_found=no
  if test "$with_canna" != "no"; then
    AC_CHECK_HEADER(canna/jrkanji.h,canna_includes_found=yes)
  fi
  if test "$canna_includes_found" = "no" -a "$with_canna" != "no" -a \
      -d "/usr/local/canna/include"; then
    save_c_switch_site="$c_switch_site"
    c_switch_site="$c_switch_site -I/usr/local/canna/include"
    AC_CHECK_HEADER(canna/jrkanji.h,canna_includes_found=yes)
    if test "$canna_includes_found" != "yes"; then
      c_switch_site="$save_c_switch_site"
      with_canna="no"
    fi
  fi

  test -z "$with_canna" && { AC_CHECK_HEADER(canna/RK.h,         , with_canna=no) }
  test -z "$with_canna" && { AC_CHECK_LIB(RKC, RkBgnBun,       [:],with_canna=no) }
  test -z "$with_canna" && { AC_CHECK_LIB(canna,jrKanjiControl,[:],with_canna=no) }
  test -z "$with_canna" && with_canna=yes
  if test "$with_canna" = "yes"; then
    AC_DEFINE(HAVE_CANNA)
    XE_PREPEND(-lcanna -lRKC, libs_x)
    XE_ADD_OBJS(mule-canna.o)
  fi

else dnl "$with_mule" = "no"
  for feature in xim canna wnn; do
    if eval "test -n \"\$with_${feature}\" -a \"\$with_${feature}\" != no" ; then
      AC_MSG_WARN("--with-${feature} ignored:  Not valid without Mule support")
    fi
    eval "with_${feature}=no"
  done
fi dnl with_mule


dnl At this point, we know whether we need the motif lib or not.
if test "$need_motif" = "yes" ; then
  XE_PREPEND(-lXm, libs_x)
  dnl AIX needs the following library for use with Motif
  AC_CHECK_LIB(i18n, layout_object_getvalue, [XE_PREPEND(-li18n, libs_x)])
  XE_COMPUTE_RUNPATH()
fi

dnl ----------------------------------------------------------------
dnl Check for POSIX functions.
dnl ----------------------------------------------------------------

AC_CHECK_FUNCS(cbrt closedir dup2 eaccess fmod fpathconf frexp ftime getaddrinfo gethostname getnameinfo getpagesize gettimeofday getcwd getwd logb lrand48 matherr mkdir mktime perror poll random rename res_init rint rmdir select setitimer setpgid setlocale setsid sigblock sighold sigprocmask snprintf stpcpy strerror tzset ulimit usleep waitpid vsnprintf fsync ftruncate umask)

dnl getaddrinfo() is borked under hpux11
if test "$ac_cv_func_getaddrinfo" != "no" ; then
  case "$opsys" in
    hpux11* )
      AC_MSG_WARN([Use of getaddrinfo is disabled for HP-UX 11.XX.])
      ac_cv_func_getaddrinfo=no
      ;;
  esac
fi

dnl ----------------------------------------------------------------
dnl Check for PTY support functions.
dnl ----------------------------------------------------------------

dnl There is no "standard" pty allocation method.  Every system is different.
dnl  getpt()  is the preferred pty allocation method on glibc systems.
dnl _getpty() is the preferred pty allocation method on SGI systems.
dnl grantpt(), unlockpt(), ptsname() are defined by Unix98.
AC_CHECK_FUNCS(getpt _getpty grantpt unlockpt ptsname killpg tcgetpgrp)

dnl openpty() is the preferred pty allocation method on BSD and Tru64 systems.
dnl openpty() might be declared in:
dnl - pty.h (Tru64 or Linux)
dnl - libutil.h (FreeBSD)
dnl - util.h (NetBSD)
AC_CHECK_FUNC(openpty, have_openpty=yes, [
  AC_CHECK_LIB(util, openpty, have_openpty=yes need_libutil=yes)])
if test "$have_openpty" = "yes"; then
  AC_DEFINE(HAVE_OPENPTY)
  AC_CHECK_HEADERS(pty.h libutil.h util.h, break)
  test "$need_libutil" = "yes" && XE_APPEND(-lutil, libs_system)
fi

dnl Check for STREAM support functions.
dnl Confusingly, "str" means both "string" and "SysV Streams".
AC_CHECK_HEADERS(stropts.h)
if test "$ac_cv_header_stropts_h" = "yes"; then
  AC_CHECK_FUNCS(isastream)
  AC_CHECK_HEADERS(strtio.h) dnl TIOCSIGNAL
fi

dnl Use our own realpath always.
XE_ADD_OBJS(realpath.o)

dnl Check whether the system provides getloadavg().
AC_CHECK_FUNCS(getloadavg)

if test "$ac_cv_func_getloadavg" = "yes"; then
  dnl Solaris 8 declares getloadavg() in <sys/loadavg.h>.
  dnl glibc 2.2 declares getloadavg() in <stdlib.h>...
  dnl   ...if we #define _GNU_SOURCE, which we do.
  AC_CHECK_HEADERS(sys/loadavg.h)
else
  dnl We define our own getloadavg() using lower level functions.
  XE_ADD_OBJS(getloadavg.o)

  dnl Used by getloadavg() - does not require root priveleges
  AC_CHECK_LIB(kstat, kstat_open)
  AC_CHECK_HEADERS(kstat.h)

  dnl Another way to get the load average
  AC_CHECK_LIB(kvm, kvm_read)
fi

dnl If netdb.h does not declare h_errno, we must declare it by hand.
AC_MSG_CHECKING(whether netdb declares h_errno)
AC_TRY_LINK([#include <netdb.h>],
  [return h_errno;],
  [AC_MSG_RESULT(yes)
   AC_DEFINE(HAVE_H_ERRNO)],
  [AC_MSG_RESULT(no)])

AC_MSG_CHECKING(for sigsetjmp)
AC_TRY_COMPILE([#include <setjmp.h>],
        [sigjmp_buf bar; sigsetjmp (bar, 0);],
  [AC_MSG_RESULT(yes)
   AC_DEFINE(HAVE_SIGSETJMP)],
  [AC_MSG_RESULT(no)])

AC_MSG_CHECKING(whether localtime caches TZ)
AC_CACHE_VAL(emacs_cv_localtime_cache,
[if test "$ac_cv_func_tzset" = "yes"; then
AC_TRY_RUN([#include <time.h>
#if STDC_HEADERS
# include <stdlib.h>
#endif
extern char **environ;
unset_TZ ()
{
  char **from, **to;
  for (to = from = environ; (*to = *from); from++)
    if (! (to[0][0] == 'T' && to[0][1] == 'Z' && to[0][2] == '='))
      to++;
}
char TZ_GMT0[] = "TZ=GMT0";
char TZ_PST8[] = "TZ=PST8";
main()
{
  time_t now = time ((time_t *) 0);
  int hour_GMT0, hour_unset;
  if (putenv (TZ_GMT0) != 0)
    exit (1);
  hour_GMT0 = localtime (&now)->tm_hour;
  unset_TZ ();
  hour_unset = localtime (&now)->tm_hour;
  if (putenv (TZ_PST8) != 0)
    exit (1);
  if (localtime (&now)->tm_hour == hour_GMT0)
    exit (1);
  unset_TZ ();
  if (localtime (&now)->tm_hour != hour_unset)
    exit (1);
  exit (0);
}], emacs_cv_localtime_cache=no, emacs_cv_localtime_cache=yes,
[# If we have tzset, assume the worst when cross-compiling.
emacs_cv_localtime_cache=yes])
else
        # If we lack tzset, report that localtime does not cache TZ,
        # since we can't invalidate the cache if we don't have tzset.
        emacs_cv_localtime_cache=no
fi],[:])dnl
AC_MSG_RESULT($emacs_cv_localtime_cache)
if test $emacs_cv_localtime_cache = yes; then
  AC_DEFINE(LOCALTIME_CACHE)
fi

if test "$HAVE_TIMEVAL" = "yes"; then
AC_MSG_CHECKING(whether gettimeofday accepts one or two arguments)
AC_TRY_LINK([
#ifdef TIME_WITH_SYS_TIME
#include <sys/time.h>
#include <time.h>
#else
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#else
#include <time.h>
#endif
#endif
  ],
  [
  struct timeval time;
  gettimeofday (&time, 0);
],
  [AC_MSG_RESULT(two)],
  [AC_MSG_RESULT(one)
   AC_DEFINE(GETTIMEOFDAY_ONE_ARGUMENT)])
fi


AC_C_INLINE
test "$ac_cv_c_inline" != "no" -a "$GCC" = "yes" && XE_ADD_OBJS(inline.o)

dnl HP-UX has a working alloca in libPW.
dnl case "${GCC}${opsys}" in hpux* )
dnl  AC_CHECK_FUNC(alloca, [:], [AC_CHECK_LIB(PW, alloca)])
dnl esac

dnl AC_FUNC_ALLOCA doesn't know about DEC C's #pragma intrinsic(alloca)
if test "$__DECC" != "yes"; then
  AC_FUNC_ALLOCA
  test -n "$ALLOCA" && XE_ADD_OBJS($ALLOCA)
fi

dnl Check whether vfork exists and works correctly. (This does more
dnl than just check for its existence.) If so, it defines HAVE_VFORK_H.
dnl If not, it defines vfork to be fork.
AC_FUNC_VFORK

dnl Check whether strcoll exists and works correctly. (This does more
dnl than just check for its existence.) If so, it defines HAVE_STRCOLL.
AC_FUNC_STRCOLL

dnl If `getpgrp' takes no argument (the POSIX.1 version), define
dnl `GETPGRP_VOID'.  Otherwise, it is the BSD version, which takes a
dnl process ID as an argument.
AC_CHECK_FUNCS(getpgrp)
AC_FUNC_GETPGRP

dnl We used to call AC_FUNC_MMAP here
dnl Instead we now use following, suggested by Neal Becker
AC_MSG_CHECKING(for working mmap)
case "$opsys" in ultrix* ) have_mmap=no ;; *)
AC_TRY_RUN([#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/mman.h>

#ifndef MAP_VARIABLE
#define MAP_VARIABLE 0
#endif

#ifndef MAP_FAILED
#define MAP_FAILED -1
#endif

int main (int argc, char *argv[])
{
  int fd = -1;
  caddr_t p;
#ifndef MAP_ANONYMOUS
  fd = open ("/dev/zero", O_RDWR);
  if (fd < 0)
    return 1;
#define MAP_ANONYMOUS 0
#endif
  if (mmap(0, 1024, PROT_READ | PROT_WRITE,
           MAP_PRIVATE | MAP_VARIABLE | MAP_ANONYMOUS,
           fd, 0) != (void *) MAP_FAILED)
    return 0;
  perror ("conftest: mmap failed");
  return 1;
}], have_mmap=yes, have_mmap=no) ;;
esac
AC_MSG_RESULT($have_mmap)
test "$have_mmap" = "yes" && AC_DEFINE(HAVE_MMAP)

dnl By default we switch off rel-alloc on cygwin as it generally causes us grief
case "$opsys" in cygwin*) 
        test "$rel_alloc" = "default" && rel_alloc=no ;;
esac
dnl rel_alloc requires either GNU malloc or system malloc with mmap
dnl We only turn rel_alloc on by default if mmap is available.
test "$GNU_MALLOC" != "yes" -a "$have_mmap" != "yes" && rel_alloc=no
if test "$rel_alloc $have_mmap" = "default yes"; then
  if test "$doug_lea_malloc" = "yes"; then
    dnl Check if malloc() calls mmap(), making rel_alloc pointless.
    AC_MSG_CHECKING(for M_MMAP_THRESHOLD)
    AC_TRY_COMPILE([#include <malloc.h>],[
#ifndef M_MMAP_THRESHOLD
#error No M_MMAP_THRESHOLD :-(
!@+$%^&*_)(_ - unlikely to compile...
#endif
], [rel_alloc=no; AC_MSG_RESULT(yes);], [rel_alloc=yes; AC_MSG_RESULT(no);])
  else
    rel_alloc=yes
  fi
fi
test "$rel_alloc" = "yes" && AC_DEFINE(REL_ALLOC)

dnl Check for terminal I/O variants
dnl TERMIOS systems may have termio.h, but not vice-versa, I think.
AC_CHECK_HEADER(termios.h,
  AC_DEFINE(HAVE_TERMIOS)
  AC_DEFINE(SIGNALS_VIA_CHARACTERS)
  AC_DEFINE(NO_TERMIO),
  [AC_CHECK_HEADER(termio.h, [AC_DEFINE(HAVE_TERMIO)])])


dnl Check for Internet sockets.
AC_CHECK_FUNC(socket,
 [AC_CHECK_HEADER(netinet/in.h,
   [AC_CHECK_HEADER(arpa/inet.h, [
  AC_DEFINE(HAVE_SOCKETS)
      AC_MSG_CHECKING("for sun_len member in struct sockaddr_un")
      AC_TRY_LINK([
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
      ],
      [static struct sockaddr_un x; x.sun_len = 1;],
      [AC_MSG_RESULT(yes); AC_DEFINE(HAVE_SOCKADDR_SUN_LEN)],
      [AC_MSG_RESULT(no)])
      AC_MSG_CHECKING("for ip_mreq struct in netinet/in.h")
      AC_TRY_LINK([
#include <sys/types.h>
#include <netinet/in.h>
      ],
      [static struct ip_mreq x;],
      [AC_MSG_RESULT(yes); AC_DEFINE(HAVE_MULTICAST)],
      [AC_MSG_RESULT(no)])])])])

dnl Check for SYS V IPC. (Inferior to sockets.)
AC_CHECK_FUNC(msgget,
  [AC_CHECK_HEADER(sys/ipc.h,
    [AC_CHECK_HEADER(sys/msg.h,
      [AC_DEFINE(HAVE_SYSVIPC)])])])

dnl Check for directory variants
AC_CHECK_HEADER(dirent.h, [AC_DEFINE(SYSV_SYSTEM_DIR)],
  [AC_CHECK_HEADER(sys/dir.h, , [AC_DEFINE(NONSYSTEM_DIR_LIBRARY)])])

dnl Check for nlist.h
AC_CHECK_HEADER(nlist.h, AC_DEFINE(NLIST_STRUCT), )

dnl Check for sound of various sorts.

dnl Autodetect native sound
AC_CHECKING("for sound support")
test -z "$with_native_sound" -a -n "$native_sound_lib" && with_native_sound=yes

if test "$with_native_sound" != "no"; then
  dnl Maybe sound is already on include path...
  if test -n "$native_sound_lib"; then
    AC_CHECK_HEADER(multimedia/audio_device.h,
      [sound_found=yes sound_cflags=""
      XE_ADD_OBJS(sunplay.o)])
  fi

  dnl Autodetect Sun native sound from SUNWaudmo package
  if test -z "$sound_found" -a -d "/usr/demo/SOUND"; then
    sound_found=yes
    XE_ADD_OBJS(sunplay.o)
    if test -d "/usr/demo/SOUND/include"
      then sound_cflags="-I/usr/demo/SOUND/include"
      else sound_cflags="-I/usr/demo/SOUND"
    fi
    if test -z "$native_sound_lib" ; then
      if test -r "/usr/demo/SOUND/lib/libaudio.a"
        then native_sound_lib="/usr/demo/SOUND/lib/libaudio.a"
        else native_sound_lib="/usr/demo/SOUND/libaudio.a"
      fi
    fi
  fi

  dnl Check for SGI and HP native sound libs
  if test -z "$sound_found"; then
    case "$canonical" in
    *-sgi-* )
      if test -z "$native_sound_lib"; then
        AC_CHECK_LIB(audio, ALopenport, native_sound_lib="-laudio")
      fi
      if test -n "$native_sound_lib"; then
        sound_found=yes sound_cflags=""
        XE_ADD_OBJS(sgiplay.o)
      fi ;;
    hppa*-hp-hpux* )
      if test -z "$native_sound_lib"; then
        AC_CHECK_LIB(Alib, AOpenAudio, native_sound_lib="-lAlib")
      fi
      if test -n "$native_sound_lib"; then
        sound_found=yes
        XE_ADD_OBJS(hpplay.o)
        if test "$GCC" = "yes" # Kludge city
          then sound_cflags="-Dconst= -Dvolatile= -I/usr/audio/examples"
          else sound_cflags="+e -I/usr/audio/examples"
        fi
      fi ;;
    esac
  fi

  dnl Win32 Native uses native sound
  if test -z "$sound_found"; then
    if test "$with_msw" = "yes"; then
    sound_found=yes
    native_sound_lib=
    fi
  fi

  dnl Check for Linux/BSD native sound
  if test -z "$sound_found"; then
    for dir in "machine" "sys" "linux"; do
      AC_CHECK_HEADER(${dir}/soundcard.h,
        sound_found=yes
       need_miscplay=yes
        XE_ADD_OBJS(linuxplay.o)
        [AC_DEFINE_UNQUOTED(SOUNDCARD_H_FILE, "${dir}/soundcard.h")]
        break)
    done
  fi

  test "$sound_found" = "yes" && with_native_sound=yes
fi

if test "$with_native_sound" = "yes"; then
  AC_DEFINE(HAVE_NATIVE_SOUND)
  test -n "$native_sound_lib" && XE_PREPEND($native_sound_lib, LIBS)
fi

dnl NAS Sound support
if test "$with_nas_sound" != "no"; then
  AC_CHECK_HEADER(audio/audiolib.h, [
    AC_CHECK_LIB(audio, AuOpenServer, have_nas_sound=yes)])
  if test "$have_nas_sound" = "yes"; then
    with_nas_sound=yes
    AC_DEFINE(HAVE_NAS_SOUND)
    XE_ADD_OBJS(nas.o)
    XE_PREPEND(-laudio, libs_x)
    dnl If the nas library does not contain the error jump point,
    dnl then we force safer behavior.
    AC_EGREP_HEADER(AuXtErrorJump,audio/Xtutil.h,,[old_nas=yes; AC_DEFINE(NAS_NO_ERROR_JUMP)])
  else
    test "$with_nas_sound" = "yes" && \
      XE_DIE("Required NAS sound support cannot be provided.")
    with_nas_sound=no
  fi
fi

dnl ESD Sound support
if test "$with_esd_sound" != "no"; then
  AC_CHECK_PROG(have_esd_config, esd-config, yes, no)
  if test "$have_esd_config" = "yes"; then
    save_c_switch_site="$c_switch_site" save_LIBS="$LIBS"
    XE_APPEND(`esd-config --cflags`, c_switch_site)
    XE_PREPEND(`esd-config --libs`, LIBS)
    AC_CHECK_FUNC(esd_play_stream,
      have_esd_sound=yes,
      c_switch_site="$save_c_switch_site" LIBS="$save_LIBS")
  fi

  if test "$have_esd_sound" = "yes"; then
    with_esd_sound=yes
    need_miscplay=yes
    XE_ADD_OBJS(esd.o)
    AC_DEFINE(HAVE_ESD_SOUND)
  else
    test "$with_esd_sound" = "yes" && \
      XE_DIE("Required ESD sound support cannot be provided.")
    with_esd_sound=no
  fi
fi

test "$need_miscplay" = "yes" && XE_ADD_OBJS(miscplay.o)

dnl ---------------------
dnl TTY-dependent options
dnl ---------------------

test -z "$with_tty" && with_tty=yes

if test "$with_tty" = "yes"  ; then
  AC_CHECKING(for TTY-related features)
  AC_DEFINE(HAVE_TTY)
  XE_ADD_OBJS(console-tty.o device-tty.o event-tty.o frame-tty.o objects-tty.o redisplay-tty.o cm.o)

  dnl Autodetect ncurses.
  if test -z "$with_ncurses"; then
    AC_CHECK_LIB(ncurses, tgetent, with_ncurses=yes, with_ncurses=no)
  fi
  if test "$with_ncurses" = "yes"; then
    AC_DEFINE(HAVE_NCURSES)
    AC_CHECK_HEADER(ncurses/curses.h, curses_h_file=ncurses/curses.h)
    AC_CHECK_HEADER(ncurses/term.h, term_h_file=ncurses/term.h)
    XE_ADD_OBJS(terminfo.o)
    XE_PREPEND(-lncurses, LIBS)

    if test "$ac_cv_header_ncurses_curses_h" != "yes" ; then
      dnl Try again, and check for the bogus ncurses/ include bug.
      dnl (i.e. ncurses/curses.h bogusly includes <unctrl.h> instead of
      dnl <ncurses/unctrl.h>)
      save_c_switch_site="$c_switch_site"
      c_switch_site="$c_switch_site -I/usr/include/ncurses"
      AC_CHECK_HEADER(ncurses/curses.h, curses_h_file=ncurses/curses.h)
      if test "$ac_cv_header_ncurses_curses_h" = "yes"
        then AC_MSG_WARN("Your system has the bogus ncurses include bug.")
        else c_switch_site="$save_c_switch_site"
      fi
    fi
  else dnl "$with_ncurses" = "no"
    dnl Autodetect terminfo/-lcurses/-ltermlib/-ltermcap
    if test "$have_terminfo" = "yes"; then
      XE_ADD_OBJS(terminfo.o)
      if test -n "$libs_termcap"; then
        XE_PREPEND($libs_termcap, LIBS)
      else
        for lib in curses termlib termcap; do
          AC_CHECK_LIB($lib, tgetent, XE_PREPEND(-l${lib}, LIBS); break)
        done
      fi
    else dnl "$have_terminfo" = "no" && "with_ncurses" = "no"
      if test -n "$libs_termcap" -a "$opsys" = "openbsd"; then
        dnl We need to check if tgoto does not exist in termcap yet
        dnl because on OpenBSD libtermcap is another name for libcurses
        dnl which provides the same tgoto as ncurses
        AC_CHECK_LIB(termcap, tgoto, , XE_ADD_OBJS(tparam.o))
      else
        XE_ADD_OBJS(tparam.o)
      fi
      dnl The HP-UX curses library seems to have a badly broken version of select(2)
      dnl that makes "poll: interrupted system call" messages to appear and
      dnl Emacs subprocesses to hang (e.g. TeX compilation w/ AUCTeX) */
      case "$opsys" in *-hp-hpux* ) libs_termcap="-ltermcap" ;; esac
      if test -n "$libs_termcap"; then
        XE_PREPEND($libs_termcap, LIBS)
      else
        AC_CHECK_LIB(curses, tgetent, XE_PREPEND(-lcurses, LIBS),
          AC_CHECK_LIB(termcap, tgetent, XE_PREPEND(-ltermcap, LIBS),
            XE_ADD_OBJS(termcap.o)))
      fi
    fi
  fi
  AC_DEFINE_UNQUOTED(CURSES_H_FILE, "${curses_h_file-curses.h}")
  AC_DEFINE_UNQUOTED(TERM_H_FILE, "${term_h_file-term.h}")

  dnl Autodetect gpm
  test -z "$with_gpm" && { AC_CHECK_HEADER(gpm.h, , with_gpm=no) }
  test -z "$with_gpm" && { AC_CHECK_LIB(gpm, Gpm_Open, with_gpm=yes, with_gpm=no) }
  if test "$with_gpm" = "yes"; then
    AC_DEFINE(HAVE_GPM)
    XE_ADD_OBJS(gpmevent.o)
    XE_PREPEND(-lgpm, LIBS)
  fi

else dnl "$with_tty" = "no"
  for feature in ncurses gpm; do
    if eval "test -n \"\$with_${feature}\" -a \"\$with_${feature}\" != no" ; then
      AC_MSG_WARN("--with-${feature} ignored:  Not valid without TTY support")
    fi
    eval "with_${feature}=no"
  done
fi dnl with_tty

dnl Do we need event-unixoid.o ?
dnl This is needed for X, or for TTY, or for MSWIN w/Cygwin select()
dnl [but not Mingw MSWIN]
test "$with_x11" = "yes" -o "$with_tty" = "yes" -o "$need_event_unixoid" = "yes" && XE_ADD_OBJS(event-unixoid.o)

dnl Database support
dnl We do not necessarily have to have libdb/lib(g)dbm for DB/(G)DBM support.
dnl On FreeBSD, both DB and DBM are part of libc.
dnl By default, we check for DBM support in libgdbm, then libc, then libdbm.

test "$with_database_gdbm $with_database_dbm $with_database_berkdb" \
  != "no no no" && AC_CHECKING(for database support)

dnl Check for ndbm.h, required for either kind of DBM support.
if test "$with_database_gdbm $with_database_dbm" != "no no"; then
  AC_CHECK_HEADER(ndbm.h, [:], [
    test "$with_database_gdbm" = "yes" -o \
         "$with_database_dbm"  = "yes" && \
      XE_DIE("Required DBM support cannot be provided.")
    with_database_gdbm=no with_database_dbm=no])
fi

dnl Check for DBM support in libgdbm.
if test "$with_database_gdbm" != "no"; then
  AC_CHECK_LIB(gdbm, dbm_open, [
   with_database_gdbm=yes with_database_dbm=no libdbm=-lgdbm], [
   if test "$with_database_gdbm" = "yes"; then
     XE_DIE("Required GNU DBM support cannot be provided.")
   fi
   with_database_gdbm=no])
fi

dnl Check for DBM support in libc and libdbm.
if test "$with_database_dbm" != "no"; then
  AC_CHECK_FUNC(dbm_open, [with_database_dbm=yes libdbm=], [
    AC_CHECK_LIB(dbm, dbm_open, [with_database_dbm=yes libdbm=-ldbm], [
      test "$with_database_dbm" = "yes" && \
        XE_DIE("Required DBM support cannot be provided.")
      with_database_dbm=no])])
fi

dnl Tell make about the DBM support we detected.
test -n "$libdbm" && XE_PREPEND("$libdbm", LIBS)
test "$with_database_gdbm" = "yes" -o \
     "$with_database_dbm"  = "yes" && \
  AC_DEFINE(HAVE_DBM)

dnl Check for Berkeley DB.
if test "$with_database_berkdb" != "no"; then
  AC_MSG_CHECKING(for Berkeley db.h)
  for header in "db/db.h" "db.h"; do
    case "$opsys" in
        *freebsd*)
    AC_TRY_COMPILE([
#include <stdlib.h>
#if !(defined __GLIBC__ && __GLIBC_MINOR__ >= 1)
#ifdef HAVE_INTTYPES_H
#define __BIT_TYPES_DEFINED__
#include <inttypes.h>
#endif
#endif
#include <$header>
],[], db_h_file="$header"; break)
        ;;
        *)
    AC_TRY_COMPILE([
#include <stdlib.h>
#if !(defined __GLIBC__ && __GLIBC_MINOR__ >= 1)
#ifdef HAVE_INTTYPES_H
#define __BIT_TYPES_DEFINED__
#include <inttypes.h>
typedef uint8_t  u_int8_t;
typedef uint16_t u_int16_t;
typedef uint32_t u_int32_t;
#ifdef WE_DONT_NEED_QUADS
typedef uint64_t u_int64_t;
#endif
#endif
#endif
#include <$header>
],[], db_h_file="$header"; break)
        ;;
        esac
  done
  if test -z "$db_h_file"
  then AC_MSG_RESULT(no); with_database_berkdb=no
  else AC_MSG_RESULT($db_h_file)
  fi

  if test "$with_database_berkdb" != "no"; then
    AC_MSG_CHECKING(for Berkeley DB version)
    AC_EGREP_CPP(yes,
[#include <$db_h_file>
#if DB_VERSION_MAJOR > 1
yes
#endif
], [AC_EGREP_CPP(yes,
[#include <$db_h_file>
#if DB_VERSION_MAJOR > 2
yes
#endif
], [AC_MSG_RESULT(3); dbfunc=db_create],[
    AC_MSG_RESULT(2); dbfunc=db_open])],[
    AC_MSG_RESULT(1); dbfunc=dbopen])
    AC_CHECK_FUNC($dbfunc,     with_database_berkdb=yes need_libdb=no, [
    AC_CHECK_LIB(db, $dbfunc,  with_database_berkdb=yes need_libdb=yes)])
  fi

  if test "$with_database_berkdb" = "yes"; then
    AC_DEFINE_UNQUOTED(DB_H_FILE, "$db_h_file")
    AC_DEFINE(HAVE_BERKELEY_DB)
    test "$need_libdb" = "yes" && XE_PREPEND(-ldb, LIBS)
  else with_database_berkdb=no
  fi
fi

if test "$with_database_gdbm $with_database_dbm $with_database_berkdb" \
     != "no no no"; then
  AC_DEFINE(HAVE_DATABASE)
  XE_ADD_OBJS(database.o)
  if test "$with_utf_2000" = "yes" -a "$with_chise" != "yes" ; then
    AC_DEFINE(HAVE_CHISE)
  fi
fi

dnl Socks support
if test "$with_socks" = "yes"; then
  AC_CHECK_LIB(socks, SOCKSinit)
  test -n "$ac_cv_lib_socks_SOCKSinit" && AC_DEFINE(HAVE_SOCKS)
fi

dnl Usage tracking (undocumented and likely unused option)
if test "$usage_tracking" = "yes"; then
  AC_DEFINE(USAGE_TRACKING)
  XE_PREPEND(-Bstatic -lut -Bdynamic, LIBS)
fi

dnl autodetect dll support
if test "$with_modules" != "no"; then
  AC_CHECKING(for module support)

  dnl Check for MS-Windows
  if test "$with_msw" = "yes"; then
    have_dl=yes;
  else
    dnl Check for Darwin
    case "$opsys" in
      darwin) have_dl=yes; AC_DEFINE(HAVE_DYLD) ;;
      *) dnl Find headers and libraries
         AC_CHECK_HEADER(dlfcn.h, [
           AC_MSG_CHECKING([for dlopen in -lc])
           AC_TRY_LINK([#include <dlfcn.h>],dnl
              [dlopen ("", 0);], [ have_dl=yes ], [
               AC_MSG_CHECKING([for dlopen in -ldl])
               ac_save_LIBS="$LIBS"
               LIBS="-ldl $LIBS"
               AC_TRY_LINK([#include <dlfcn.h>],dnl
                 [dlopen ("", 0);], [ have_dl=yes ],
                 [LIBS="$ac_save_LIBS"])
               ac_save_LIBS=])])
        if test -n "$have_dl"; then
           AC_DEFINE(HAVE_DLOPEN)
        else
           AC_CHECK_LIB(dld, shl_load, [
           libdl=dld have_dl=yes;
           AC_DEFINE(HAVE_SHL_LOAD)], [
           AC_CHECK_LIB(dld, dld_init, [
           libdl=dld have_dl=yes;
           AC_DEFINE(HAVE_DLD_INIT)])])
        fi
    ;;
    esac
  fi dnl end !MS-Windows

  if test -n "$have_dl"; then
    dnl XE_SHLIB_STUFF (in aclocal.m4) defines $can_build_shared
    XE_SHLIB_STUFF
  fi

  if test "$can_build_shared" = "yes"; then
    AC_DEFINE(HAVE_SHLIB)
    XE_ADD_OBJS(sysdll.o emodules.o)
    XE_APPEND(src, INSTALL_ARCH_DEP_SUBDIR)
    test -n "$libdl" && XE_PREPEND(-l${libdl}, LIBS)
    AC_CHECK_FUNCS(dlerror _dlerror)
    with_modules=yes
  else
    if test "$with_modules" = "yes"; then
      XE_DIE("Required module support cannot be provided.")
    else
      AC_MSG_WARN("Module support cannot be provided.")
    fi
    with_modules=no
  fi
fi

dnl Unfortunately, just because we can link doesn't mean we can run.
dnl One of the above link tests may have succeeded but caused resulting
dnl executables to fail to run.  Also any tests using AC_TRY_RUN will
dnl have reported incorrect results.
AC_TRY_RUN([int main(int c,char *v[]){return 0;}],[:],[
  echo ""
  echo "*** PANIC *** configure forgot how to build working executables!"
  echo ""
  echo "*** This is most commonly due to an unforeseen environment, causing"
  echo "*** configure to incorrectly compute the sequence of libraries to link."
  echo "*** Please examine the tail of config.log for runtime errors."
  echo "*** Pay special attention to the -l flags, and perhaps -I and -L."
  echo "*** Often adding or removing explicit options in the configure"
  echo "*** invocation can work around this kind of problem.  If so, please"
  echo "*** report it as a bug to xemacs-beta@xemacs.org."
  echo "***"
  echo "*** Other possible causes are inability to write to the file system"
  echo "*** (bogus permissions or disk full) or a misconfiguration of the dynamic"
  echo "*** linker.  On Linux, check /etc/ld.conf and rerun ldconfig if"
  echo "*** necessary.  On other systems, try telling configure where to find"
  echo "*** the shared libraries using the --site-runtime-libraries option."
  echo "***"
  echo "*** Another way to shoot yourself in the foot is to specify"
  echo "*** --with-FEATURE when FEATURE is not actually installed on your"
  echo "*** system.  Don't do that."
  exit 1])

dnl Process support
if test "$win32_processes" = "yes"; then
  XE_ADD_OBJS(process-nt.o)
else
  AC_DEFINE(HAVE_UNIX_PROCESSES)
  XE_ADD_OBJS(process-unix.o)
fi

dnl --------------------------------
dnl Compute SUBST-itutable variables
dnl --------------------------------

dnl We ignore (C|LD)_SWITCH_X_(MACHINE|SYSTEM)
dnl Use XE_SPACE instead of plain assignment statements to remove extraneous blanks
XE_SPACE(CFLAGS, $CFLAGS)
XE_SPACE(extra_objs, $extra_objs)
XE_SPACE(c_switch_general, -DHAVE_CONFIG_H $c_switch_site $c_switch_machine $c_switch_system)
XE_SPACE(c_switch_window_system, $c_switch_x_site $c_switch_gtk $X_CFLAGS)
XE_SPACE(c_switch_all, $c_switch_general $c_switch_window_system)
XE_SPACE(ld_switch_general, $ld_switch_site $ld_switch_machine $ld_switch_system $ld_switch_run)
XE_SPACE(ld_switch_window_system, $ld_switch_x_site)
XE_SPACE(ld_switch_all, $ld_switch_general $ld_switch_window_system)
XE_SPACE(ld_libs_general, $LIBS $libs_machine $libs_system $libs_standard)
XE_SPACE(ld_libs_window_system, $X_EXTRA_LIBS $libs_x $libs_gtk $X_PRE_LIBS)
XE_SPACE(ld_libs_all, $ld_libs_window_system $ld_libs_general)

dnl Compute lists of Makefiles and subdirs
AC_SUBST(SRC_SUBDIR_DEPS)
XE_APPEND(src, MAKE_SUBDIR)
internal_makefile_list="Makefile.in"
SUBDIR_MAKEFILES=''
test -d lock || mkdir lock
for dir in $MAKE_SUBDIR; do
  case "$dir" in */* ) dnl Implement mkdir -p
    ( for d in `echo $dir | sed 's:/: :g'` ; do
        test -d "$d" || mkdir "$d"; cd "$d"
      done ) ;;
   * ) test -d "$dir" || mkdir "$dir" ;;
  esac
  XE_SPACE(SUBDIR_MAKEFILES, $SUBDIR_MAKEFILES $dir/Makefile $dir/GNUmakefile)
  XE_SPACE(internal_makefile_list, $internal_makefile_list $dir/Makefile.in)
done
AC_SUBST(INSTALL_ARCH_DEP_SUBDIR)
AC_SUBST(MAKE_SUBDIR)
AC_SUBST(SUBDIR_MAKEFILES)

dnl Make s&m symlinks in the src directory, for config.h
for dir in src/s src/m; do
  if test ! -d "$dir" ; then
    echo Making symbolic link to "$srcdir/$dir"
    ${LN_S} "$srcdir/$dir" "$dir"
  fi
done

if test "$extra_verbose" = "yes"; then
  echo ""
  PRINT_VAR(extra_objs
   c_switch_general  c_switch_window_system  c_switch_all
  ld_switch_general ld_switch_window_system ld_switch_all
    ld_libs_general   ld_libs_window_system   ld_libs_all)
  echo ""
fi

dnl ----------------------------------------------
dnl Create some auxiliary files for developers.
dnl ----------------------------------------------

dnl Create a .gdbinit useful for debugging XEmacs
if test -f "$srcdir/src/.gdbinit" -a ! -f "src/.gdbinit"; then
  test "$extra_verbose" = "yes" && echo "creating src/.gdbinit"
  echo "source $srcdir/src/.gdbinit" > "src/.gdbinit"
fi

dnl Create a .dbxrc useful for debugging XEmacs
if test -f "$srcdir/src/.dbxrc" -a ! -f "src/.dbxrc"; then
  test "$extra_verbose" = "yes" && echo "creating src/.dbxrc"
  echo ". $srcdir/src/.dbxrc" > "src/.dbxrc"
fi

dnl Create a useful TAGS file
if test -f "$srcdir/TAGS" -a ! -f "TAGS"; then
  test "$extra_verbose" = "yes" && echo "creating TAGS"
  echo "\f
$srcdir/TAGS,include" > "TAGS"
fi

dnl Create top level .sbinit for Sun compilers
if test "$__SUNPRO_C" = "yes"; then
  test "$extra_verbose" = "yes" && echo "creating .sbinit"
  ( echo "# For use with Sun WorkShop's Source browser."
    echo "# See sbquery(1) and sbinit(4) for more information"
    for dir in $MAKE_SUBDIR; do echo "import $dir"; done
  ) > .sbinit
fi

dnl There are no more compile tests; remove the core they created.
rm -f core

dnl ----------------------------------------------
dnl Substitute into Makefile, config.h and paths.h
dnl ----------------------------------------------

dnl what sort of things to edit into Makefile, config.h and paths.h
dnl configuration here uncanonicalized to avoid exceeding size limits.

AC_SUBST(PROGNAME)
AC_SUBST(version)
AC_SUBST(configuration)
AC_SUBST(canonical)
AC_SUBST(inststaticdir)
AC_SUBST(instvardir)
AC_SUBST(srcdir)
AC_SUBST(bindir)
AC_SUBST(datadir)
AC_SUBST(pkgdir)
AC_SUBST(statedir)
AC_SUBST(libdir)
AC_SUBST(mandir)
AC_SUBST(extra_includes)

AC_SUBST(prefix)
AC_SUBST(PREFIX_USER_DEFINED)
dnl Yo, Stephen Bourne!  I want to marry you!
PREFIX=$prefix
while true; do
  case "$PREFIX" in
    *\$* ) eval "PREFIX=$PREFIX" ;;
    *) break ;;
  esac
done
AC_SUBST(PREFIX)

AC_SUBST(exec_prefix)
AC_SUBST(EXEC_PREFIX_USER_DEFINED)
EXEC_PREFIX=$exec_prefix
while true; do
  case "$EXEC_PREFIX" in
    *\$* ) eval "EXEC_PREFIX=$EXEC_PREFIX" ;;
    *) break ;;
  esac
done
AC_SUBST(EXEC_PREFIX)

AC_SUBST(infodir)
AC_SUBST(INFODIR_USER_DEFINED)
INFODIR=$infodir
while true; do
  case "$INFODIR" in
    *\$* ) eval "INFODIR=$INFODIR" ;;
    *) break ;;
  esac
done
AC_SUBST(INFODIR)

AC_SUBST(infopath)
AC_SUBST(INFOPATH_USER_DEFINED)
INFOPATH=$infopath
while true; do
  case "$INFOPATH" in
    *\$* ) eval "INFOPATH=$INFOPATH" ;;
    *) break ;;
  esac
done
AC_SUBST(INFOPATH)

AC_SUBST(package_path)
AC_SUBST(PACKAGE_PATH_USER_DEFINED)
PACKAGE_PATH=$package_path
while true; do
  case "$PACKAGE_PATH" in
    *\$* ) eval "PACKAGE_PATH=$PACKAGE_PATH" ;;
    *) break ;;
  esac
done
AC_SUBST(PACKAGE_PATH)

AC_SUBST(lispdir)
AC_SUBST(LISPDIR_USER_DEFINED)
LISPDIR=$lispdir
while true; do
  case "$LISPDIR" in
    *\$* ) eval "LISPDIR=$LISPDIR" ;;
    *) break ;;
  esac
done
AC_SUBST(LISPDIR)

AC_SUBST(moduledir)
AC_SUBST(MODULEDIR_USER_DEFINED)
MODULEDIR=$moduledir
while true; do
  case "$MODULEDIR" in
    *\$* ) eval "MODULEDIR=$MODULEDIR" ;;
    *) break ;;
  esac
done
AC_SUBST(MODULEDIR)

AC_SUBST(sitelispdir)
AC_SUBST(SITELISPDIR_USER_DEFINED)
SITELISPDIR=$sitelispdir
while true; do
  case "$SITELISPDIR" in
    *\$* ) eval "SITELISPDIR=$SITELISPDIR" ;;
    *) break ;;
  esac
done
AC_SUBST(SITELISPDIR)

AC_SUBST(sitemoduledir)
AC_SUBST(SITEMODULEDIR_USER_DEFINED)
SITEMODULEDIR=$sitemoduledir
while true; do
  case "$SITEMODULEDIR" in
    *\$* ) eval "SITEMODULEDIR=$SITEMODULEDIR" ;;
    *) break ;;
  esac
done
AC_SUBST(SITEMODULEDIR)

AC_SUBST(etcdir)
AC_SUBST(ETCDIR_USER_DEFINED)
ETCDIR=$etcdir
while true; do
  case "$ETCDIR" in
    *\$* ) eval "ETCDIR=$ETCDIR" ;;
    *) break ;;
  esac
done
AC_SUBST(ETCDIR)

AC_SUBST(docdir)
AC_SUBST(DOCDIR_USER_DEFINED)
DOCDIR=$docdir
while true; do
  case "$DOCDIR" in
    *\$* ) eval "DOCDIR=$DOCDIR" ;;
    *) break ;;
  esac
done
AC_SUBST(DOCDIR)

AC_SUBST(archlibdir)
AC_SUBST(ARCHLIBDIR_USER_DEFINED)
ARCHLIBDIR=$archlibdir
while true; do
  case "$ARCHLIBDIR" in
    *\$* ) eval "ARCHLIBDIR=$ARCHLIBDIR" ;;
    *) break ;;
  esac
done
AC_SUBST(ARCHLIBDIR)

AC_SUBST(docdir)
AC_SUBST(bitmapdir)
AC_SUBST(extra_objs)

dnl The following flags combine all the information from:
dnl - command line options (user always gets priority)
dnl - user environment variables
dnl - determined by configure
dnl - the s&m header files (required for ellcc)
AC_SUBST(machfile)
AC_SUBST(opsysfile)
AC_SUBST(c_switch_general)
AC_SUBST(c_switch_window_system)
AC_SUBST(c_switch_all)
AC_SUBST(ld_switch_general)
AC_SUBST(ld_switch_window_system)
AC_SUBST(ld_switch_all)
AC_SUBST(ld_libs_general)
AC_SUBST(ld_libs_window_system)
AC_SUBST(ld_libs_all)
AC_SUBST(CFLAGS)
AC_SUBST(CPPFLAGS)
AC_SUBST(LDFLAGS)
RECURSIVE_MAKE="\$(MAKE) \$(MFLAGS) CC='\$(CC)' CFLAGS='\$(CFLAGS)' LDFLAGS='\$(LDFLAGS)' CPPFLAGS='\$(CPPFLAGS)'"
AC_SUBST(RECURSIVE_MAKE)

AC_SUBST(native_sound_lib)
AC_SUBST(sound_cflags)
AC_SUBST(RANLIB)
AC_SUBST(dynodump_arch)

dnl Preliminary support for using a different compiler for xemacs itself.
dnl Useful for building XEmacs with a C++ or 64-bit compiler.
: ${XEMACS_CC:=$CC}
AC_SUBST(XEMACS_CC)

dnl The default is yes
if test "$with_prefix" = "yes"; then
  AC_DEFINE(PREFIX_USER_DEFINED)
fi

dnl The default is no
if test "$with_site_lisp" = "no"; then
  AC_DEFINE(INHIBIT_SITE_LISP)
fi
dnl The default is yes
if test "$with_site_modules" = "no"; then
  AC_DEFINE(INHIBIT_SITE_MODULES)
fi

XE_SPACE(ac_configure_args, $ac_configure_args)
AC_DEFINE_UNQUOTED(EMACS_CONFIGURATION, "$configuration")
AC_DEFINE_UNQUOTED(EMACS_CONFIG_OPTIONS, "$ac_configure_args")

dnl Following are deprecated

null_string=""
AC_DEFINE_UNQUOTED(LD_SWITCH_X_SITE,     $null_string)
AC_DEFINE_UNQUOTED(LD_SWITCH_X_SITE_AUX, $null_string)
AC_DEFINE_UNQUOTED(C_SWITCH_X_SITE,      $null_string)
AC_DEFINE_UNQUOTED(LD_SWITCH_SITE,       $null_string)
AC_DEFINE_UNQUOTED(C_SWITCH_SITE,        $null_string)

dnl Note: as a general rule, *only* define things here that are not
dnl autodetected.  For things that are autodetected, define them
dnl at the point where the autodetection occurs or would occur,
dnl so that the user gets immediate feedback on the results of the
dnl autodetection.

if   test "$GNU_MALLOC"         = "yes"; then AC_DEFINE(GNU_MALLOC)
elif test "$with_system_malloc" = "yes"; then AC_DEFINE(USE_SYSTEM_MALLOC)
elif test "$with_debug_malloc"  = "yes"; then AC_DEFINE(USE_DEBUG_MALLOC)
                                              AC_DEFINE(USE_SYSTEM_MALLOC)
fi
test "$with_i18n3"         = "yes" && AC_DEFINE(I18N3)
test "$GCC"                = "yes" && AC_DEFINE(USE_GCC)
test "$external_widget"    = "yes" && AC_DEFINE(EXTERNAL_WIDGET)
test "$quick_build"        = "yes" && AC_DEFINE(QUICK_BUILD)
test "$with_purify"        = "yes" && AC_DEFINE(PURIFY)
test "$with_quantify"      = "yes" && AC_DEFINE(QUANTIFY)
test "$with_pop"           = "yes" && AC_DEFINE(MAIL_USE_POP)
test "$with_kerberos"      = "yes" && AC_DEFINE(KERBEROS)
test "$with_hesiod"        = "yes" && AC_DEFINE(HESIOD)
test "$use_union_type"     = "yes" && AC_DEFINE(USE_UNION_TYPE)
test "$use_regex_malloc"   = "yes" && AC_DEFINE(REGEX_MALLOC)
test "$pdump"              = "yes" && AC_DEFINE(PDUMP)
test "$with_ipv6_cname"    = "yes" && AC_DEFINE(IPV6_CANONICALIZE)

dnl -------------------------------
dnl Report on what we decided to do
dnl -------------------------------

(
dnl /etc/osversion is on SONY NEWS-OS
if test -f /etc/osversion; then dnl SONY NEWS-OS
  echo "osversion: `cat /etc/osversion`"
else
  echo "uname -a: `uname -a`"
fi
echo ""
echo "$0 $quoted_arguments"
) > Installation

if test ! -z ${emacs_beta_version} ; then
  if test -z "${emacs_is_beta}" ; then
        xemacs_betaname=".${emacs_beta_version}"
  else
        xemacs_betaname="-b${emacs_beta_version}"
  fi
else
  xemacs_betaname=""
fi

dnl Start stdout redirection to '| tee -a Installation'
(
echo "

XEmacs ${emacs_major_version}.${emacs_minor_version}${xemacs_betaname} \"$xemacs_codename\" configured for \`$canonical'.
"
echo "
Compilation / Installation:"
echo "  Source code location:              $srcdir"
echo "  Installation prefix:               $prefix"
if test -n "$site_includes"; then
  echo "  Additional header files:           $site_includes"
fi
if test -n "$site_libraries"; then
  echo "  Additional libraries:              $site_libraries"
fi
if test -n "$site_prefixes"; then
  echo "  Additional prefixes:               $site_prefixes"
fi
if test -n "$runpath"; then
  echo "  Runtime library search path:       $runpath"
fi

if test -n "$opsysfile"
then echo "  Operating system description file: \`$opsysfile'"
else echo "  Not using any operating system description file"
fi
if test -n "$machfile"
then echo "  Machine description file:          \`$machfile'"
else echo "  Not using any machine description file"
fi

echo "  Compiler:                          $CC $CFLAGS"
echo "  Relocating allocator for buffers:  $rel_alloc"
echo "  GNU version of malloc:             ${GNU_MALLOC}${GNU_MALLOC_reason}"
case "$ld_switch_site" in
  *nocombreloc*) echo "  Linking with \`-z nocombreloc'.
    - Consider configuring with --pdump." ;;
esac

echo "
Window System:"
if test "$with_msw" = "yes"; then
  echo "  Compiling in support for the Microsoft window system."
fi
if test "$with_x11" = "yes"; then
  echo "  Compiling in support for the X window system:"
  echo "    - X Windows headers location:                 $x_includes"
  echo "    - X Windows libraries location:               $x_libraries"
  if test "$with_xauth" != yes; then
    echo "    - Xau (X authority) not available."
  fi
  if test "$with_xmu" != yes; then
    echo "    - Xmu library not available; substituting equivalent routines."
  fi
  if test "$with_wmcommand" != no; then
    echo "    - Handling WM_COMMAND properly."
  fi
fi
if test "$need_motif" = "yes" ; then
  echo "  Compiling in support for Motif."
  echo "  *WARNING*  Many versions of Motif are buggy, requiring workarounds."
  echo "             You are likely to experience slow redisplay."
  echo "             You may need to install vendor patches to Motif."
  echo "             See PROBLEMS for more information."
fi
if test "$need_athena" = "yes"; then
  echo "  Compiling in support for the Athena widget set:"
  echo "    - Athena headers location:                    $athena_h_path"
  echo "    - Athena library to link:                     $athena_lib"
fi
case "$with_menubars" in
  gtk   ) echo "  Using GTK menubars."   ;;
  lucid ) echo "  Using Lucid menubars." ;;
  motif ) echo "  Using Motif menubars."
          echo "  *WARNING*  The Motif menubar implementation is currently buggy."
          echo "             We recommend using the Lucid menubar instead."
          echo "             Re-run configure with --with-menubars='lucid'." ;;
    msw ) echo "  Using MS-Windows menubars." ;;
esac
case "$with_scrollbars" in
  gtk    ) echo "  Using GTK scrollbars."        ;;
  lucid  ) echo "  Using Lucid scrollbars."      ;;
  motif  ) echo "  Using Motif scrollbars."      ;;
  athena ) echo "  Using Athena scrollbars."     ;;
     msw ) echo "  Using MS-Windows scrollbars." ;;
esac
case "$with_dialogs" in
  gtk    ) echo "  Using GTK dialog boxes." ;;
  motif  ) echo "  Using Motif dialog boxes."
           if test "$unexec" = "unexaix.o"; then if test "`uname -v`" = 4 -a "`uname -r`" -ge 3; then
             echo "  *WARNING*  The Motif dialog boxes cause problems on AIX 4.3 and higher."
             echo "             We recommend using the Athena dialog boxes instead."
             echo "             Install libXaw and re-run configure with --with-dialogs='athena'."
             echo "             Read the PROBLEMS file for more information."
           fi; fi ;;
  athena ) echo "  Using Athena dialog boxes."     ;;
     msw ) echo "  Using MS-Windows dialog boxes." ;;
esac
case "$with_widgets" in
  gtk    ) echo "  Using GTK native widgets."        ;;
  motif  ) echo "  Using Motif native widgets."      ;;
  athena ) echo "  Using Athena native widgets."     ;;
     msw ) echo "  Using MS-Windows native widgets." ;;
esac
if test "$with_dragndrop" = yes; then
  echo "  Compiling in support for Drag'n'Drop (EXPERIMENTAL)."
  echo "    -  Drag'n'Drop prototype:                             $dragndrop_proto."
fi

echo "
TTY:"
test "$with_ncurses" = yes && echo "  Compiling in support for ncurses."
test "$with_gpm" = yes && echo "  Compiling in support for GPM (General Purpose Mouse)."

echo "
Images:"
test "$with_gif" = yes && echo "  Compiling in support for GIF  images (builtin)."
if test "$with_xpm" = yes; then
  echo "  Compiling in support for XPM  images."
elif test "$with_x11" = yes; then
  echo "  WARNING: -----------------------------------------------------------"
  echo "  WARNING: Compiling without XPM image support."
  if test "$xpm_problem" != ""; then
    echo "  Reason: $xpm_problem"
  fi
  echo "  WARNING: You should strongly consider installing XPM."
  echo "  WARNING: Otherwise toolbars and other graphics will look suboptimal."
  echo "  WARNING: (a copy may be found in ftp://ftp.xemacs.org/pub/xemacs/aux)"
  echo "  WARNING: -----------------------------------------------------------"
fi
if test "$with_png" = yes; then
  echo "  Compiling in support for PNG  images."
elif test "$window_system" != "none"; then
  echo "  WARNING: -----------------------------------------------------------"
  echo "  WARNING: Compiling without PNG image support."
  if test "$png_problem" != ""; then
    echo "  Reason: $png_problem"
  fi
  echo "  WARNING: You should strongly consider installing the PNG libraries."
  echo "  WARNING: Otherwise certain images and glyphs may not display."
  echo "  WARNING: (a copy may be found in ftp://ftp.xemacs.org/pub/xemacs/aux)"
  echo "  WARNING: -----------------------------------------------------------"
fi
test "$with_jpeg" = yes && echo "  Compiling in support for JPEG images."
test "$with_tiff" = yes && echo "  Compiling in support for TIFF images."
test "$with_xface" = yes && echo "  Compiling in support for X-Face message headers."

echo "
Sound:"
test "$with_native_sound" = yes && echo "  Compiling in support for sound (native)."
test "$with_nas_sound" = yes && echo "  Compiling in support for NAS (network audio system)."
test "$old_nas" = yes && echo "    - NAS library lacks error trapping; will play synchronously."
test "$with_esd_sound" = yes && echo "  Compiling in support for ESD (Enlightened Sound Daemon)."

echo "
Databases:"
test "$with_database_berkdb" = yes && echo "  Compiling in support for Berkeley database."
test "$with_database_dbm"    = yes && echo "  Compiling in support for DBM."
test "$with_database_gdbm"   = yes && echo "  Compiling in support for GNU DBM."
test "$with_ldap" = yes && echo "  Compiling in support for LDAP."
if test "$with_postgresql" = yes; then
  echo "  Compiling in support for PostgreSQL."
  echo "    - Using PostgreSQL header file:  $libpq_fe_h_file"
  test "$with_postgresqlv7" = yes && echo "    - Using PostgreSQL V7 bindings."
fi

echo "
Multiscriptization / Multilingualization / Internationalization:"
test "$with_mule" = yes && echo "  Compiling in support for Mule (multi-lingual Emacs)."
test "$with_chise" = yes && echo "  Using CHISE (CHaracter Information Service Environment) support."
test "$with_utf_2000" = yes && echo "  Using UTF-2000 (UTF-8) buffer/string representation."
test "$with_text_coding" = yes && echo "  Compiling in support for text coding."
test "$with_file_coding" = yes && echo "  Compiling in support for file coding."
test "$with_xim" != no && echo "  Compiling in support for XIM (X11R5+ I18N input method)."
test "$with_xim" = motif && echo "    - Using Motif to provide XIM support."
test "$with_xim" = xlib && echo "    - Using raw Xlib to provide XIM support."
test "$with_xfs" = yes && echo "    - Using XFontSet to provide bilingual menubar."
test "$with_canna" = yes && echo "  Compiling in support for Canna on Mule."
if test "$with_wnn" = yes; then
  echo "  Compiling in support for the WNN input method on Mule."
  test "$with_wnn6" = yes && echo "    - Using WNN version 6."
fi
test "$with_i18n3" = yes && echo "  Compiling in support for I18N level 3 (doesn't currently work)."

echo "
Mail:"
test "$with_pop" = yes && echo "  Compiling in support for POP mail retrieval."
test "$with_kerberos" = yes && echo "  Compiling in support for Kerberos POP authentication."
test "$with_hesiod" = yes && echo "  Compiling in support for Hesiod POP server access."
test -n "$mail_locking" && echo "  Compiling in support for \"$mail_locking\" mail spool file locking method."

echo "
Other Features:"
test "$with_ipv6_cname" = no && echo "  Inhibiting IPv6 canonicalization at startup."
test "$with_tooltalk" = yes && echo "  Compiling in support for ToolTalk."
test "$with_workshop" = yes && echo "  Compiling in support for Sun WorkShop."
test "$with_socks" = yes && echo "  Compiling in support for SOCKS."
test "$with_dnet" = yes && echo "  Compiling in support for DNET."
test "$with_modules" = "yes" && echo "  Compiling in support for dynamic shared object modules."
if test "$use_union_type" = yes; then
  echo "  WARNING: ---------------------------------------------------------"
  echo "  Using the union type for Lisp_Objects."
  echo "  Union type has been implicated in hard-to-debug runtime crashes."
  echo "  Do NOT use this build of XEmacs for ordinary work.  See PROBLEMS."
  echo "  WARNING: ---------------------------------------------------------"
fi
if test "$use_regex_malloc" = no; then
  echo "  WARNING: -----------------------------------------------------------"
  echo "  Using alloca to allocate the failure stack."
  echo "  It may be impossible to detect stack exhaustion, and you will crash."
  echo "  Do NOT use this build of XEmacs for ordinary work."
  echo "  WARNING: -----------------------------------------------------------"
fi
test "$pdump" = yes && echo "  Using the new portable dumper."
test "$debug" = yes && echo "  Compiling in support for extra debugging code."
test "$usage_tracking" = yes && echo "  Compiling in support for active usage tracking (Sun internal)."
if test "$error_check_extents $error_check_typecheck $error_check_bufpos $error_check_gc $error_check_malloc $error_check_glyphs" \
  != "no no no no no no"; then
  echo "  WARNING: ---------------------------------------------------------"
  echo "  WARNING: Compiling in support for runtime error checking."
  echo "  WARNING: XEmacs will run noticeably more slowly as a result."
  echo "  WARNING: Error checking is on by default for XEmacs beta releases."
  echo "  WARNING: ---------------------------------------------------------"
fi
echo ""
) | tee -a Installation
dnl echo "The above configure report is appended to \"Installation\" file."
echo ""

dnl -----------------------------------
dnl Now generate config.h and Makefiles
dnl -----------------------------------
dnl This has to be called in order for this variable to get into config.status
AC_SUBST(internal_makefile_list)
# Remove any trailing slashes in these variables.
test -n "$prefix" &&
  prefix=`echo '' "$prefix" | sed -e 's:^ ::' -e 's,\([[^/]]\)/*$,\1,'`
test -n "$exec_prefix" &&
  exec_prefix=`echo '' "$exec_prefix" | sed -e 's:^ ::' -e 's,\([[^/]]\)/*$,\1,'`

dnl Build Makefile.in's from Makefile.in.in's
dnl except ./Makefile from $srcdir/Makefile.in

for file in $internal_makefile_list; do
  test "$file" = src/Makefile.in && \
    file="src/Makefile.in:src/Makefile.in.in:src/depend"
  XE_APPEND($file, ac_output_files)
done
ac_output_files="$ac_output_files src/paths.h lib-src/config.values"
test "$with_modules" = "yes" && XE_APPEND(lib-src/ellcc.h, ac_output_files)

AC_OUTPUT($ac_output_files,
[for dir in . $MAKE_SUBDIR; do
  (
    cd $dir
    rm -f junk.c
    < Makefile.in \
      sed -e '/^# Generated/d' \
          -e 's%/\*\*/#.*%%' \
          -e 's/^ *# */#/' \
dnl Delete Makefile.in.in comment lines
          -e '/^##/d' \
dnl Pass through CPP directives unchanged
          -e '/^#/ {
p
d
}'        \
dnl Quote other lines to protect from CPP substitution
          -e '/./ {
s/\([[\"]]\)/\\\1/g
s/^/"/
s/$/"/
}'  > junk.c;

dnl Create a GNUmakefile and Makefile from Makefile.in.

changequote(<<,>>)dnl
dnl CPP_MAKEFILE(CPPFLAGS,filename)
define(<<CPP_MAKEFILE>>,
echo creating $dir/<<$2>>
$CPP -I. -I${top_srcdir}/src <<$1>> junk.c \
dnl Delete line directives inserted by $CPP
  | sed -e 's/^\#.*//'          \
dnl Delete spurious blanks inserted by $CPP
        -e 's/^[ TAB][ TAB]*$//'\
        -e 's/^ /TAB/'          \
dnl Delete blank lines
        -e '/^[ \f]*$/d' \
dnl Restore lines quoted above to original contents.
        -e '/^\"/ {
        s/\\\([\"]\)/\1/g
        s/^[ TAB]*\"//
        s/\"[ TAB]*$//
}' > Makefile.new
    chmod 444 Makefile.new
    mv -f Makefile.new <<$2>>
)dnl CPP_MAKEFILE

    CPP_MAKEFILE(,Makefile)
    CPP_MAKEFILE(-DUSE_GNU_MAKE,GNUmakefile)
changequote([,])dnl
    rm -f junk.c
  )
done

dnl Append AC_DEFINE information to lib-src/config.values
dnl (AC_SUBST information is already there (see config.values.sh).
sed < config.status >> lib-src/config.values \
  -e '/{ac_dA}.*{ac_dB}.*{ac_dC}.*{ac_dD}$/!d' \
  -e 's/\${ac_dA}\(.*\)\${ac_dB}.*\${ac_dC}\(.*\)\${ac_dD}/\1 \2/' \
  -e 's/^\([[^ ]]*\) $/\1 ""/' \
  -e 's/ 1$/ t/'

],
[CPP="$CPP"
 top_srcdir="$srcdir"
 MAKE_SUBDIR="$MAKE_SUBDIR"
])dnl