Fix typos in comments.

[emacs.git] / configure.in

dnl  Autoconf script for GNU Emacs
dnl To rebuild the `configure' script from this, execute the command
dnl     autoconf
dnl in the directory containing this script.
dnl
dnl  Copyright (C) 1994, 1995, 1996, 1999, 2000, 2001, 2002, 2003,
dnl    2004, 2005, 2006, 2007, 2008, 2009  Free Software Foundation, Inc.
dnl
dnl  This file is part of GNU Emacs.
dnl
dnl  GNU Emacs is free software: you can redistribute it and/or modify
dnl  it under the terms of the GNU General Public License as published by
dnl  the Free Software Foundation, either version 3 of the License, or
dnl  (at your option) any later version.
dnl
dnl  GNU Emacs is distributed in the hope that it will be useful,
dnl  but WITHOUT ANY WARRANTY; without even the implied warranty of
dnl  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
dnl  GNU General Public License for more details.
dnl
dnl  You should have received a copy of the GNU General Public License
dnl  along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.

AC_PREREQ(2.62)
AC_INIT(emacs, 23.1.50)
AC_CONFIG_HEADER(src/config.h:src/config.in)
AC_CONFIG_SRCDIR(src/lisp.h)

dnl Support for --program-prefix, --program-suffix and
dnl --program-transform-name options
AC_ARG_PROGRAM

lispdir='${datadir}/emacs/${version}/lisp'
locallisppath='${datadir}/emacs/${version}/site-lisp:'\
'${datadir}/emacs/site-lisp'
lisppath='${locallisppath}:${lispdir}:${datadir}/emacs/${version}/leim'
etcdir='${datadir}/emacs/${version}/etc'
archlibdir='${libexecdir}/emacs/${version}/${configuration}'
docdir='${datadir}/emacs/${version}/etc'
gamedir='${localstatedir}/games/emacs'

gameuser=games

dnl OPTION_DEFAULT_OFF(NAME, HELP-STRING)
dnl Create a new --with option that defaults to being disabled.
dnl NAME is the base name of the option.  The shell variable with_NAME
dnl   will be set to either the user's value (if the option is
dnl   specified; 'yes' for a plain --with-NAME) or to 'no' (if the
dnl   option is not specified).  Note that the shell variable name is
dnl   constructed as autoconf does, by replacing non-alphanumeric
dnl   characters with "_".
dnl HELP-STRING is the help text for the option.
AC_DEFUN([OPTION_DEFAULT_OFF], [dnl
  AC_ARG_WITH([$1],[AS_HELP_STRING([--with-$1],[$2])],[],[dnl
    m4_bpatsubst([with_$1], [[^0-9a-z]], [_])=no])dnl
])dnl

dnl OPTION_DEFAULT_ON(NAME, HELP-STRING)
dnl Create a new --with option that defaults to being enabled.  NAME
dnl   is the base name of the option.  The shell variable with_NAME
dnl   will be set either to 'no' (for a plain --without-NAME) or to
dnl   'yes' (if the option is not specified).  Note that the shell
dnl   variable name is constructed as autoconf does, by replacing
dnl   non-alphanumeric characters with "_".
dnl HELP-STRING is the help text for the option.
AC_DEFUN([OPTION_DEFAULT_ON], [dnl
  AC_ARG_WITH([$1],[AS_HELP_STRING([--without-$1],[$2])],[],[dnl
   m4_bpatsubst([with_$1], [[^0-9a-z]], [_])=yes])dnl
])dnl

OPTION_DEFAULT_ON([pop],[don't support POP mail retrieval with movemail])
if test "$with_pop" = yes; then
   AC_DEFINE(MAIL_USE_POP)
fi
AH_TEMPLATE(MAIL_USE_POP, [Define to support POP mail retrieval.])dnl

OPTION_DEFAULT_OFF([kerberos],[support Kerberos-authenticated POP])
if test "$with_kerberos" != no; then
   AC_DEFINE(KERBEROS)
fi
AH_TEMPLATE(KERBEROS,
            [Define to support Kerberos-authenticated POP mail retrieval.])dnl

OPTION_DEFAULT_OFF([kerberos5],[support Kerberos version 5 authenticated POP])
if test "${with_kerberos5}" != no; then
  if test "${with_kerberos}" = no; then
    with_kerberos=yes
    AC_DEFINE(KERBEROS)
  fi
  AC_DEFINE(KERBEROS5, 1, [Define to use Kerberos 5 instead of Kerberos 4.])
fi

OPTION_DEFAULT_OFF([hesiod],[support Hesiod to get the POP server host])
if test "$with_hesiod" != no; then
  AC_DEFINE(HESIOD, 1, [Define to support using a Hesiod database to find the POP server.])
fi

OPTION_DEFAULT_ON([sound],[don't compile with sound support])

OPTION_DEFAULT_ON([sync-input],[process async input synchronously])
if test "$with_sync_input" = yes; then
   AC_DEFINE(SYNC_INPUT, 1, [Process async input synchronously.])
fi

dnl FIXME currently it is not the last.
dnl This should be the last --with option, because --with-x is
dnl added later on when we find the path of X, and it's best to
dnl keep them together visually.
AC_ARG_WITH([x-toolkit],[AS_HELP_STRING([--with-x-toolkit=KIT],
 [use an X toolkit (KIT one of: yes, lucid, athena, motif, gtk, no)])],
[         case "${withval}" in
            y | ye | yes )      val=gtk ;;
            n | no )            val=no  ;;
            l | lu | luc | luci | lucid )       val=lucid ;;
            a | at | ath | athe | athen | athena )      val=athena ;;
            m | mo | mot | moti | motif )       val=motif ;;
            g | gt | gtk  )     val=gtk ;;
            * )
AC_MSG_ERROR([`--with-x-toolkit=$withval' is invalid;
this option's value should be `yes', `no', `lucid', `athena', `motif' or `gtk'.
`yes' and `gtk' are synonyms. `athena' and `lucid' are synonyms.])
            ;;
          esac
          with_x_toolkit=$val
])

dnl _ON results in a '--without' option in the --help output, so
dnl the help text should refer to "don't compile", etc.
OPTION_DEFAULT_ON([xpm],[don't compile with XPM image support])
OPTION_DEFAULT_ON([jpeg],[don't compile with JPEG image support])
OPTION_DEFAULT_ON([tiff],[don't compile with TIFF image support])
OPTION_DEFAULT_ON([gif],[don't compile with GIF image support])
OPTION_DEFAULT_ON([png],[don't compile with PNG image support])
OPTION_DEFAULT_ON([rsvg],[don't compile with SVG image support])

OPTION_DEFAULT_ON([xft],[don't use XFT for anti aliased fonts])
OPTION_DEFAULT_ON([libotf],[don't use libotf for OpenType font support])
OPTION_DEFAULT_ON([m17n-flt],[don't use m17n-flt for text shaping])

OPTION_DEFAULT_ON([toolkit-scroll-bars],[don't use Motif or Xaw3d scroll bars])
OPTION_DEFAULT_ON([xaw3d],[don't use Xaw3d])
OPTION_DEFAULT_ON([xim],[don't use X11 XIM])
OPTION_DEFAULT_OFF([ns],[use nextstep (Cocoa or GNUstep) windowing system])

OPTION_DEFAULT_ON([gpm],[don't use -lgpm for mouse support on a GNU/Linux console])
OPTION_DEFAULT_ON([dbus],[don't compile with D-Bus support])

## For the times when you want to build Emacs but don't have
## a suitable makeinfo, and can live without the manuals.
dnl http://lists.gnu.org/archive/html/emacs-devel/2008-04/msg01844.html
OPTION_DEFAULT_ON([makeinfo],[don't require makeinfo for building manuals])

dnl Can remove these in Emacs 24.
AC_ARG_WITH([gtk],,
  [AC_MSG_ERROR([--with-gtk has been removed.  Use --with-x-toolkit to
specify a toolkit.])],,)

AC_ARG_WITH([gcc],,
  [AC_MSG_ERROR([--with-gcc has been removed.  Set the `CC' environment
variable to specify a compiler.])],,)

AC_ARG_WITH([pkg-config-prog],dnl
[AS_HELP_STRING([--with-pkg-config-prog=PATH],
                  [path to pkg-config for finding GTK and librsvg])])
if test "X${with_pkg_config_prog}" != X; then
   if test "${with_pkg_config_prog}" != yes; then
      PKG_CONFIG="${with_pkg_config_prog}"
   fi
fi

AC_ARG_WITH([gnustep-conf],dnl
[AS_HELP_STRING([--with-gnustep-conf=PATH],[path to GNUstep.conf; default $GNUSTEP_CONFIG_FILE, or /etc/GNUstep/GNUstep.conf])])
test "X${with_gnustep_conf}" != X && test "${with_gnustep_conf}" != yes && \
  GNUSTEP_CONFIG_FILE="${with_gnustep_conf}"
test "X$GNUSTEP_CONFIG_FILE" = "X" && \
     GNUSTEP_CONFIG_FILE=/etc/GNUstep/GNUstep.conf

AC_ARG_ENABLE(ns-self-contained,
[AS_HELP_STRING([--disable-ns-self-contained],
                [disable self contained build under NeXTstep])],
   EN_NS_SELF_CONTAINED=$enableval,
   EN_NS_SELF_CONTAINED=yes)

AC_ARG_ENABLE(asserts,
[AS_HELP_STRING([--enable-asserts], [compile code with asserts enabled])],
      USE_XASSERTS=$enableval,
      USE_XASSERTS=no)

AC_ARG_ENABLE(maintainer-mode,
[AS_HELP_STRING([--enable-maintainer-mode],
                [enable make rules and dependencies not useful (and sometimes
                 confusing) to the casual installer])],
      USE_MAINTAINER_MODE=$enableval,
      USE_MAINTAINER_MODE=no)
if test $USE_MAINTAINER_MODE = yes; then
  MAINT=
else
  MAINT=#
fi
AC_SUBST(MAINT)

AC_ARG_ENABLE(locallisppath,
[AS_HELP_STRING([--enable-locallisppath=PATH],
                [directories Emacs should search for lisp files specific
                 to this site])],
if test "${enableval}" = "no"; then
  locallisppath=
elif test "${enableval}" != "yes"; then
  locallisppath=${enableval}
fi)

AC_ARG_ENABLE(checking,
[AS_HELP_STRING([--enable-checking@<:@=LIST@:>@],
                [enable expensive run-time checks.  With LIST,
                 enable only specific categories of checks.
                 Categories are: all,yes,no.
                 Flags are: stringbytes, stringoverrun, stringfreelist,
                 xmallocoverrun, conslist])],
[ac_checking_flags="${enableval}"],[])
IFS="${IFS=     }"; ac_save_IFS="$IFS"; IFS="$IFS,"
for check in $ac_checking_flags
do
        case $check in
        # these set all the flags to specific states
        yes)            ac_enable_checking=1 ;;
        no)             ac_enable_checking= ;
                        ac_gc_check_stringbytes= ;
                        ac_gc_check_string_overrun= ;
                        ac_gc_check_string_free_list= ;
                        ac_xmalloc_overrun= ;
                        ac_gc_check_cons_list= ;;
        all)            ac_enable_checking=1 ;
                        ac_gc_check_stringbytes=1 ;
                        ac_gc_check_string_overrun=1 ;
                        ac_gc_check_string_free_list=1 ;
                        ac_xmalloc_overrun=1 ;
                        ac_gc_check_cons_list=1 ;;
        # these enable particular checks
        stringbytes)    ac_gc_check_stringbytes=1 ;;
        stringoverrun)  ac_gc_check_string_overrun=1 ;;
        stringfreelist) ac_gc_check_string_free_list=1 ;;
        xmallocoverrun) ac_xmalloc_overrun=1 ;;
        conslist)       ac_gc_check_cons_list=1 ;;
        *)      AC_MSG_ERROR(unknown check category $check) ;;
        esac
done
IFS="$ac_save_IFS"

if test x$ac_enable_checking != x ; then
  AC_DEFINE(ENABLE_CHECKING, 1,
[Enable expensive run-time checking of data types?])
fi
if test x$ac_gc_check_stringbytes != x ; then
  AC_DEFINE(GC_CHECK_STRING_BYTES, 1,
[Define this temporarily to hunt a bug.  If defined, the size of
   strings is redundantly recorded in sdata structures so that it can
   be compared to the sizes recorded in Lisp strings.])
fi
if test x$ac_gc_check_stringoverrun != x ; then
  AC_DEFINE(GC_CHECK_STRING_OVERRUN, 1,
[Define this to check for short string overrun.])
fi
if test x$ac_gc_check_string_free_list != x ; then
  AC_DEFINE(GC_CHECK_STRING_FREE_LIST, 1,
[Define this to check the string free list.])
fi
if test x$ac_xmalloc_overrun != x ; then
  AC_DEFINE(XMALLOC_OVERRUN_CHECK, 1,
[Define this to check for malloc buffer overrun.])
fi
if test x$ac_gc_check_cons_list != x ; then
  AC_DEFINE(GC_CHECK_CONS_LIST, 1,
[Define this to check for errors in cons list.])
fi

AC_ARG_ENABLE(profiling,
[AS_HELP_STRING([--enable-profiling],
                [build emacs with profiling support.
                 This might not work on all platforms])],
[ac_enable_profiling="${enableval}"],[])
if test x$ac_enable_profiling != x ; then
   PROFILING_CFLAGS="-DPROFILING=1 -pg"
   PROFILING_LDFLAGS="-pg"
else
   PROFILING_CFLAGS=
   PROFILING_LDFLAGS=
fi

#### Make srcdir absolute, if it isn't already.  It's important to
#### avoid running the path through pwd unnecessarily, since pwd can
#### give you automounter prefixes, which can go away.  We do all this
#### so Emacs can find its files when run uninstalled.
## Make sure CDPATH doesn't affect cd (in case PWD is relative).
unset CDPATH
case "${srcdir}" in
  /* ) ;;
  . )
    ## We may be able to use the $PWD environment variable to make this
    ## absolute.  But sometimes PWD is inaccurate.
    ## Note: we used to use ${PWD} at the end instead of `pwd`,
    ## but that tested only for a well-formed and valid PWD,
    ## it did not object when PWD was well-formed and valid but just wrong.
    if test ".${PWD}" != "." && test ".`(cd ${PWD} ; sh -c pwd)`" = ".`pwd`"  ;
    then
      srcdir="$PWD"
    else
      srcdir="`(cd ${srcdir}; pwd)`"
    fi
  ;;
  *  ) srcdir="`(cd ${srcdir}; pwd)`" ;;
esac

#### Check if the source directory already has a configured system in it.
if test `pwd` != `(cd ${srcdir} && pwd)` \
   && test -f "${srcdir}/src/config.h" ; then
  AC_MSG_WARN([[The directory tree `${srcdir}' is being used
   as a build directory right now; it has been configured in its own
   right.  To configure in another directory as well, you MUST
   use GNU make.  If you do not have GNU make, then you must
   now do `make distclean' in ${srcdir},
   and then run $0 again.]])
fi

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

### Canonicalize the configuration name.

AC_CANONICAL_HOST
canonical=$host
configuration=${host_alias-${build_alias-$host}}

dnl This used to use changequote, but, apart from `changequote is evil'
dnl per the autoconf manual, we can speed up autoconf somewhat by quoting
dnl the great gob of text.  Thus it's not processed for possible expansion.
dnl Just make sure the brackets remain balanced.
dnl
dnl Since Emacs can't find matching pairs of quotes, boundaries are
dnl indicated by comments.
dnl quotation begins
[

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

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

machine='' opsys='' unported=no
case "${canonical}" in

  ## FreeBSD ports
  *-*-freebsd* )
    opsys=freebsd
    case "${canonical}" in
      alpha*-*-freebsd*)        machine=alpha ;;
      arm*-*-freebsd*)          machine=arm ;;
      ia64-*-freebsd*)          machine=ia64 ;;
      sparc-*-freebsd*)         machine=sparc ;;
      sparc64-*-freebsd*)       machine=sparc ;;
      powerpc-*-freebsd*)       machine=macppc ;;
      i[3456]86-*-freebsd*)     machine=intel386 ;;
      amd64-*-freebsd*|x86_64-*-freebsd*) machine=amdx86-64 ;;
    esac
  ;;

  ## FreeBSD kernel + glibc based userland
  *-*-kfreebsd*gnu* )
    opsys=gnu-kfreebsd
    case "${canonical}" in
      alpha*-*-kfreebsd*)       machine=alpha ;;
      ia64-*-kfreebsd*)         machine=ia64 ;;
      sparc-*-kfreebsd*)        machine=sparc ;;
      sparc64-*-kfreebsd*)      machine=sparc ;;
      powerpc-*-kfreebsd*)      machine=macppc ;;
      i[3456]86-*-kfreebsd*)    machine=intel386 ;;
      amd64-*-kfreebsd*|x86_64-*-kfreebsd*) machine=amdx86-64 ;;
    esac
  ;;

  ## NetBSD ports
  *-*-netbsd* )
    opsys=netbsd
    if test -f /usr/lib/crti.o; then]
dnl The close and open brackets here are because this section is quoted --
dnl see the `changequote' comment above.
      AC_DEFINE(HAVE_CRTIN, [], [Define to 1 if you have /usr/lib/crti.o.])
[   fi

    case "${canonical}" in
      alpha*-*-netbsd*) machine=alpha ;;
      i[3456]86-*-netbsd*) machine=intel386 ;;
      mips-*-netbsd*)   machine=mips ;;
      mipsel-*-netbsd*) machine=mips ;;
      mipseb-*-netbsd*) machine=mips ;;
      powerpc-*-netbsd*) machine=macppc ;;
      sparc*-*-netbsd*) machine=sparc ;;
      vax-*-netbsd*)    machine=vax ;;
      arm-*-netbsd*)    machine=arm ;;
      x86_64-*-netbsd*) machine=amdx86-64 ;;
      hppa-*-netbsd*)   machine=hp800 ;;
      m68k-*-netbsd*)   machine=m68k ;;
    esac
  ;;

  ## OpenBSD ports
  *-*-openbsd* )
    opsys=openbsd
    case "${canonical}" in
      alpha*-*-openbsd*)        machine=alpha ;;
      arm-*-openbsd*)          machine=arm ;;
      i386-*-openbsd*)         machine=intel386 ;;
      powerpc-*-openbsd*)      machine=macppc ;;
      sparc*-*-openbsd*)       machine=sparc ;;
      vax-*-openbsd*)          machine=vax ;;
      x86_64-*-openbsd*)       machine=amdx86-64 ;;
      hppa-*-openbsd*)         machine=hp800 ;;
    esac
  ;;

  ## LynxOS ports
  *-*-lynxos* )
    opsys=lynxos
    case "${canonical}" in
      i[3456]86-*-lynxos*) machine=intel386 ;;
      powerpc-*-lynxos*) machine=powerpc ;;
    esac
  ;;

  alpha*-*-linux-gnu* )
    machine=alpha opsys=gnu-linux
  ;;

  arm*-*-linux-gnu* )
    machine=arm opsys=gnu-linux
  ;;

  ## Apple Darwin / Mac OS X
  *-apple-darwin* )
    case "${canonical}" in
      i[3456]86-* )  machine=intel386 ;;
      powerpc-* )    machine=macppc ;;
      * )            unported=yes ;;
    esac
    opsys=darwin
    # Define CPP as follows to make autoconf work correctly.
    CPP="${CC-cc} -E -no-cpp-precomp"
    # Use fink packages if available.
    if test -d /sw/include && test -d /sw/lib; then
      GCC_TEST_OPTIONS="-I/sw/include -L/sw/lib"
      CPP="${CPP} ${GCC_TEST_OPTIONS}"
      NON_GCC_TEST_OPTIONS=${GCC_TEST_OPTIONS}
    fi
  ;;

  ## HP 9000 series 700 and 800, running HP/UX
  hppa*-hp-hpux10.2* )
    machine=hp800 opsys=hpux10-20
  ;;
  hppa*-hp-hpux1[1-9]* )
    machine=hp800 opsys=hpux11
    CFLAGS="-D_INCLUDE__STDC_A1_SOURCE $CFLAGS"
  ;;

  hppa*-*-linux-gnu* )
    machine=hp800 opsys=gnu-linux
  ;;

  ## IBM machines
  s390-*-linux-gnu* )
    machine=ibms390 opsys=gnu-linux
  ;;
  s390x-*-linux-gnu* )
    machine=ibms390x opsys=gnu-linux
  ;;
  rs6000-ibm-aix4.2* | powerpc-ibm-aix4.2*  )
    machine=ibmrs6000 opsys=aix4-2
  ;;
  rs6000-ibm-aix4.3* | powerpc-ibm-aix4.3*  )
    machine=ibmrs6000 opsys=aix4-2
  ;;
  rs6000-ibm-aix5* | powerpc-ibm-aix5*  )
    machine=ibmrs6000 opsys=aix4-2
  ;;
  rs6000-ibm-aix6* | powerpc-ibm-aix6*  )
    machine=ibmrs6000 opsys=aix4-2
  ;;

  ## Macintosh PowerPC
  powerpc*-*-linux-gnu* )
    machine=macppc opsys=gnu-linux
  ;;

  ## Silicon Graphics machines
  ## Iris 4D
  mips-sgi-irix6.5 )
    machine=iris4d opsys=irix6-5
    # Without defining _LANGUAGE_C, things get masked out in the headers
    # so that, for instance, grepping for `free' in stdlib.h fails and
    # AC_HEADER_STD_C fails.   (MIPSPro 7.2.1.2m compilers, Irix 6.5.3m).
    NON_GNU_CPP="/lib/cpp -D_LANGUAGE_C"
    NON_GCC_TEST_OPTIONS="-D_LANGUAGE_C"
  ;;

  ## Suns
  sparc-*-linux-gnu* | sparc64-*-linux-gnu* )
    machine=sparc opsys=gnu-linux
  ;;

  *-sun-solaris* \
    | i[3456]86-*-solaris2* | i[3456]86-*-sunos5* \
    | x86_64-*-solaris2*    | x86_64-*-sunos5*    \
    | powerpc*-*-solaris2*  | rs6000-*-solaris2*)
    case "${canonical}" in
      i[3456]86-*-* )     machine=intel386 ;;
      amd64-*-*|x86_64-*-*)     machine=amdx86-64 ;;
      powerpc* | rs6000* )  machine=ibmrs6000 ;;
      sparc* )          machine=sparc ;;
      * )               unported=yes ;;
    esac
    case "${canonical}" in
      *-sunos5.3* | *-solaris2.3* )
                opsys=sol2-3
                NON_GNU_CPP=/usr/ccs/lib/cpp
                ;;
      *-sunos5.4* | *-solaris2.4* )
                opsys=sol2-4
                NON_GNU_CPP=/usr/ccs/lib/cpp
                RANLIB="ar -ts"
                ;;
      *-sunos5.5* | *-solaris2.5* )
                opsys=sol2-5
                NON_GNU_CPP=/usr/ccs/lib/cpp
                RANLIB="ar -ts"
                ;;
      *-sunos5.6* | *-solaris2.6* )
                opsys=sol2-6
                NON_GNU_CPP=/usr/ccs/lib/cpp
                RANLIB="ar -ts"
                ;;
      *-sunos5.[7-9]* | *-solaris2.[7-9]* )
                opsys=sol2-6
                emacs_check_sunpro_c=yes
                NON_GNU_CPP=/usr/ccs/lib/cpp
                ;;
      *-sunos5* | *-solaris* )
                opsys=sol2-10
                emacs_check_sunpro_c=yes
                NON_GNU_CPP=/usr/ccs/lib/cpp
                ;;
    esac
    ## Watch out for a compiler that we know will not work.
    case "${canonical}" in
     *-solaris* | *-sunos5* )
                if [ "x$CC" = x/usr/ucb/cc ]; then
                  ## /usr/ucb/cc doesn't work;
                  ## we should find some other compiler that does work.
                  unset CC
                fi
                ;;
      *) ;;
    esac
  ;;

  ## Vaxen.
  vax-dec-* )
    machine=vax
    case "${canonical}" in
      *-vms* )                                          opsys=vms ;;
      * )                                               unported=yes
    esac
  ;;

  ## IA-64
  ia64*-*-linux* )
    machine=ia64 opsys=gnu-linux
  ;;

  ## Intel 386 machines where we don't care about the manufacturer
  i[3456]86-*-* )
    machine=intel386
    case "${canonical}" in
      *-cygwin )                opsys=cygwin ;;
      *-darwin* )               opsys=darwin
                                CPP="${CC-cc} -E -no-cpp-precomp"
                                ;;
      *-linux-gnu* )            opsys=gnu-linux ;;
      *-sysv4.2uw* )            opsys=unixware; NON_GNU_CPP=/lib/cpp ;;
      *-sysv5uw* )              opsys=unixware; NON_GNU_CPP=/lib/cpp ;;
      *-sysv5OpenUNIX* )        opsys=unixware; NON_GNU_CPP=/lib/cpp ;;
      ## Otherwise, we'll fall through to the generic opsys code at the bottom.
    esac
  ;;

  ## m68k Linux-based GNU system
  m68k-*-linux-gnu* )
    machine=m68k opsys=gnu-linux
  ;;

  ## Mips Linux-based GNU system
  mips-*-linux-gnu* | mipsel-*-linux-gnu* \
    | mips64-*-linux-gnu* | mips64el-*-linux-gnu* )
    machine=mips opsys=gnu-linux
  ;;

  ## AMD x86-64 Linux-based GNU system
  x86_64-*-linux-gnu* )
    machine=amdx86-64 opsys=gnu-linux
  ;;

  ## Tensilica Xtensa Linux-based GNU system
  xtensa*-*-linux-gnu* )
    machine=xtensa opsys=gnu-linux
    ;;

  ## SuperH Linux-based GNU system
  sh[34]*-*-linux-gnu* )
    machine=sh3 opsys=gnu-linux
  ;;

  * )
    unported=yes
  ;;
esac

### If the code above didn't choose an operating system, just choose
### an operating system based on the configuration name.  You really
### only want to use this when you have no idea what the right
### operating system is; if you know what operating systems a machine
### runs, it's cleaner to make it explicit in the case statement
### above.
if test x"${opsys}" = x; then
  case "${canonical}" in
    *-gnu* )                            opsys=gnu ;;
    *-sysv4.2uw* )                      opsys=unixware ;;
    *-sysv5uw* )                        opsys=unixware ;;
    *-sysv5OpenUNIX* )                  opsys=unixware ;;
    *-sysv4.1* | *-sysvr4.1* )
        NON_GNU_CPP=/usr/lib/cpp
        opsys=usg5-4 ;;
    *-sysv4.[2-9]* | *-sysvr4.[2-9]* )
        if [ x$NON_GNU_CPP = x ]; then
          if [ -f /usr/ccs/lib/cpp ]; then
            NON_GNU_CPP=/usr/ccs/lib/cpp
          else
            NON_GNU_CPP=/lib/cpp
          fi
        fi
        opsys=usg5-4-2 ;;
    *-sysv4* | *-sysvr4* )              opsys=usg5-4 ;;
    * )
      unported=yes
    ;;
  esac
fi

]
dnl quotation ends

if test $unported = yes; then
  AC_MSG_ERROR([Emacs hasn't been ported to `${canonical}' systems.
Check `etc/MACHINES' for recognized configuration names.])
fi

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


#### Choose a compiler.
test -n "$CC" && cc_specified=yes

# Save the value of CFLAGS that the user specified.
SPECIFIED_CFLAGS="$CFLAGS"

dnl Sets GCC=yes if using gcc.
AC_PROG_CC

# On Suns, sometimes $CPP names a directory.
if test -n "$CPP" && test -d "$CPP"; then
  CPP=
fi

## If not using gcc, and on Solaris, and no CPP specified, see if
## using a Sun compiler, which needs -Xs to prevent whitespace.
if test x"$GCC" != xyes && test x"$emacs_check_sunpro_c" = xyes && \
 test x"$CPP" = x; then
  AC_MSG_CHECKING([whether we are using a Sun C compiler])
  AC_CACHE_VAL(emacs_cv_sunpro_c,
  [AC_TRY_LINK([],
[#ifndef __SUNPRO_C
fail;
#endif
], emacs_cv_sunpro_c=yes, emacs_cv_sunpro_c=no)])
  AC_MSG_RESULT($emacs_cv_sunpro_c)

  if test x"$emacs_cv_sunpro_c" = xyes; then
    NON_GNU_CPP="$CC -E -Xs"
  fi
fi

#### Some systems specify a CPP to use unless we are using GCC.
#### Now that we know whether we are using GCC, we can decide whether
#### to use that one.
if test "x$NON_GNU_CPP" != x && test x$GCC != xyes && test "x$CPP" = x
then
  CPP="$NON_GNU_CPP"
fi

#### Some systems specify a CC to use unless we are using GCC.
#### Now that we know whether we are using GCC, we can decide whether
#### to use that one.
if test "x$NON_GNU_CC" != x && test x$GCC != xyes &&
  test x$cc_specified != xyes
then
  CC="$NON_GNU_CC"
fi

if test x$GCC = xyes && test "x$GCC_TEST_OPTIONS" != x
then
  CC="$CC $GCC_TEST_OPTIONS"
fi

if test x$GCC = x && test "x$NON_GCC_TEST_OPTIONS" != x
then
  CC="$CC $NON_GCC_TEST_OPTIONS"
fi

dnl checks for Unix variants
AC_USE_SYSTEM_EXTENSIONS

### Use -Wno-pointer-sign if the compiler supports it
AC_MSG_CHECKING([whether gcc understands -Wno-pointer-sign])
SAVE_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -Wno-pointer-sign"
AC_TRY_COMPILE([], [], has_option=yes, has_option=no,)
if test $has_option = yes; then
   C_WARNINGS_SWITCH="-Wno-pointer-sign $C_WARNINGS_SWITCH"
fi
AC_MSG_RESULT($has_option)
CFLAGS="$SAVE_CFLAGS"
unset has_option
unset SAVE_CFLAGS

#### Some other nice autoconf tests.

dnl checks for programs
AC_PROG_LN_S
AC_PROG_CPP
AC_PROG_INSTALL
if test "x$RANLIB" = x; then
  AC_PROG_RANLIB
fi
AC_PATH_PROG(INSTALL_INFO, install-info)
AC_PATH_PROG(INSTALL_INFO, install-info,, /usr/sbin)
AC_PATH_PROG(INSTALL_INFO, install-info,:, /sbin)
dnl Don't use GZIP, which is used by gzip for additional parameters.
AC_PATH_PROG(GZIP_PROG, gzip)


## Need makeinfo >= 4.6 (?) to build the manuals.
AC_PATH_PROG(MAKEINFO, makeinfo, no)
dnl By this stage, configure has already checked for egrep and set EGREP,
dnl or exited with an error if no egrep was found.
if test "$MAKEINFO" != "no" && \
  test x"`$MAKEINFO --version 2> /dev/null | $EGREP 'texinfo[[^0-9]]*([[1-4]][[0-9]]+|[[5-9]]|4\.[[6-9]]|4\.[[1-5]][[0-9]]+)'`" = x; then
   MAKEINFO=no
fi

## Makeinfo is unusual.  For a released Emacs, the manuals are
## pre-built, and not deleted by the normal clean rules.  makeinfo is
## therefore in the category of "special tools" not normally required, which
## configure does not have to check for (eg autoconf itself).
## In a CVS checkout on the other hand, the manuals are not included.
## So makeinfo is a requirement to build from CVS, and configure
## should test for it as it does for any other build requirement.
## We use the presence of $srcdir/info/emacs to distinguish a release,
## with pre-built manuals, from a CVS checkout.
if test "$MAKEINFO" = "no"; then
  if test "x${with_makeinfo}" = "xno"; then
    MAKEINFO=off
  elif ! test -e $srcdir/info/emacs; then
    AC_MSG_ERROR( [You do not seem to have makeinfo >= 4.6, and your
source tree does not seem to have pre-built manuals in the `info' directory.
Either install a suitable version of makeinfo, or re-run configure
with the `--without-makeinfo' option to build without the manuals.] )
  fi
fi

dnl Add our options to ac_link now, after it is set up.

if test x$GCC = xyes && test "x$GCC_LINK_TEST_OPTIONS" != x
then
  ac_link="$ac_link $GCC_LINK_TEST_OPTIONS"
fi

if test x$GCC = x && test "x$NON_GCC_LINK_TEST_OPTIONS" != x
then
  ac_link="$ac_link $NON_GCC_LINK_TEST_OPTIONS"
fi

dnl We need -znocombreloc if we're using a relatively recent GNU ld.
dnl If we can link with the flag, it shouldn't do any harm anyhow.
dnl (Don't use `-z nocombreloc' as -z takes no arg on Irix.)
dnl Treat GCC specially since it just gives a non-fatal `unrecognized option'
dnl if not built to support GNU ld.

late_LDFLAGS=$LDFLAGS
if test "$GCC" = yes; then
  LDFLAGS="$LDFLAGS -Wl,-znocombreloc"
else
  LDFLAGS="$LDFLAGS -znocombreloc"
fi

AC_MSG_CHECKING([for -znocombreloc])
AC_LINK_IFELSE([main(){return 0;}],
  [AC_MSG_RESULT(yes)],
  LDFLAGS=$late_LDFLAGS
  [AC_MSG_RESULT(no)])

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

AC_CHECKING([the machine- and system-dependent files to find out
 - which libraries the lib-src programs will want, and
 - whether the GNU malloc routines are usable])

### First figure out CFLAGS (which we use for running the compiler here)
### and REAL_CFLAGS (which we use for real compilation).
### The two are the same except on a few systems, where they are made
### different to work around various lossages.  For example,
### GCC 2.5 on GNU/Linux needs them to be different because it treats -g
### as implying static linking.

### If the CFLAGS env var is specified, we use that value
### instead of the default.

### It's not important that this name contain the PID; you can't run
### two configures in the same directory and have anything work
### anyway.
tempcname="conftest.c"

echo '
#include "'${srcdir}'/src/'${opsysfile}'"
#include "'${srcdir}'/src/'${machfile}'"
#ifndef LIBS_MACHINE
#define LIBS_MACHINE
#endif
#ifndef LIBS_SYSTEM
#define LIBS_SYSTEM
#endif
#ifndef C_SWITCH_SYSTEM
#define C_SWITCH_SYSTEM
#endif
#ifndef C_SWITCH_MACHINE
#define C_SWITCH_MACHINE
#endif
configure___ libsrc_libs=LIBS_MACHINE LIBS_SYSTEM
configure___ c_switch_system=C_SWITCH_SYSTEM
configure___ c_switch_machine=C_SWITCH_MACHINE

#ifndef LIB_X11_LIB
#define LIB_X11_LIB -lX11
#endif

#ifndef LIBX11_SYSTEM
#define LIBX11_SYSTEM
#endif
configure___ LIBX=LIB_X11_LIB LIBX11_SYSTEM

#ifdef UNEXEC
configure___ unexec=UNEXEC
#else
configure___ unexec=unexec.o
#endif

#ifdef SYSTEM_MALLOC
configure___ system_malloc=yes
#else
configure___ system_malloc=no
#endif

#ifdef USE_MMAP_FOR_BUFFERS
configure___ use_mmap_for_buffers=yes
#else
configure___ use_mmap_for_buffers=no
#endif

#ifndef C_DEBUG_SWITCH
#define C_DEBUG_SWITCH -g
#endif

#ifndef C_OPTIMIZE_SWITCH
#ifdef __GNUC__
#define C_OPTIMIZE_SWITCH -O2
#else
#define C_OPTIMIZE_SWITCH -O
#endif
#endif

#ifndef C_WARNINGS_SWITCH
#define C_WARNINGS_SWITCH ${C_WARNINGS_SWITCH}
#endif

#ifndef LD_SWITCH_MACHINE
#define LD_SWITCH_MACHINE
#endif

#ifndef LD_SWITCH_SYSTEM
#define LD_SWITCH_SYSTEM
#endif

#ifndef LD_SWITCH_X_SITE_AUX
#define LD_SWITCH_X_SITE_AUX
#endif

configure___ ld_switch_system=LD_SWITCH_SYSTEM
configure___ ld_switch_machine=LD_SWITCH_MACHINE

#ifdef THIS_IS_CONFIGURE

/* Get the CFLAGS for tests in configure.  */
#ifdef __GNUC__
configure___ CFLAGS=C_DEBUG_SWITCH C_OPTIMIZE_SWITCH '${SPECIFIED_CFLAGS}'
#else
configure___ CFLAGS=C_DEBUG_SWITCH '${SPECIFIED_CFLAGS}'
#endif

#else /* not THIS_IS_CONFIGURE */

/* Get the CFLAGS for real compilation.  */
#ifdef __GNUC__
configure___ REAL_CFLAGS=C_DEBUG_SWITCH C_OPTIMIZE_SWITCH C_WARNINGS_SWITCH ${PROFILING_CFLAGS} '${SPECIFIED_CFLAGS}'
#else
configure___ REAL_CFLAGS=C_DEBUG_SWITCH '${SPECIFIED_CFLAGS}'
#endif

#endif /* not THIS_IS_CONFIGURE */
' > ${tempcname}

LDFLAGS="${LDFLAGS} ${PROFILING_LDFLAGS}"

# The value of CPP is a quoted variable reference, so we need to do this
# to get its actual value...
CPP=`eval "echo $CPP"`
[eval `${CPP} -Isrc ${tempcname} \
       | sed -n -e 's/^configure___ \([^=]*=\)\(.*\)$/\1"\2"/p'`
if test "x$SPECIFIED_CFLAGS" = x; then
  eval `${CPP} -Isrc -DTHIS_IS_CONFIGURE ${tempcname} \
         | sed -n -e 's/^configure___ \([^=]*=\)\(.*\)$/\1"\2"/p'`
else
  REAL_CFLAGS="$CFLAGS"
fi]
rm ${tempcname}

ac_link="$ac_link $ld_switch_machine $ld_switch_system"

### Make sure subsequent tests use flags consistent with the build flags.

if test x"${OVERRIDE_CPPFLAGS}" != x; then
  CPPFLAGS="${OVERRIDE_CPPFLAGS}"
else
  CPPFLAGS="$c_switch_system $c_switch_machine $CPPFLAGS"
fi

dnl For AC_FUNC_GETLOADAVG, at least:
AC_CONFIG_LIBOBJ_DIR(src)

dnl Do this early because it can frob feature test macros for Unix-98 &c.
AC_SYS_LARGEFILE


### The standard library on x86-64 and s390x GNU/Linux distributions can
### be located in either /usr/lib64 or /usr/lib.
### In some rare cases, /usr/lib64 exists but does not contain the
### relevant files (bug#1287).  Hence test for crtn.o.
case "${canonical}" in
  x86_64-*-linux-gnu* | s390x-*-linux-gnu* )
    if test -e /usr/lib64/crtn.o; then
      AC_DEFINE(HAVE_LIB64_DIR, 1,
        [Define to 1 if the directory /usr/lib64 exists.])
fi
esac

dnl This function defintion taken from Gnome 2.0
dnl PKG_CHECK_MODULES(GSTUFF, gtk+-2.0 >= 1.3 glib = 1.3.4, action-if, action-not)
dnl defines GSTUFF_LIBS, GSTUFF_CFLAGS, see pkg-config man page
dnl also defines GSTUFF_PKG_ERRORS on error
AC_DEFUN([PKG_CHECK_MODULES], [
  succeeded=no

  AC_PATH_PROG(PKG_CONFIG, pkg-config, no)

  if test "$PKG_CONFIG" = "no" ; then
     ifelse([$4], , [AC_MSG_ERROR([
      *** The pkg-config script could not be found. Make sure it is in your path, or give the full path to pkg-config with the PKG_CONFIG environment variable or --with-pkg-config-prog.  Or see http://www.freedesktop.org/software/pkgconfig to get pkg-config.])], [$4])
  else
     PKG_CONFIG_MIN_VERSION=0.9.0
     if $PKG_CONFIG --atleast-pkgconfig-version $PKG_CONFIG_MIN_VERSION; then
        AC_MSG_CHECKING(for $2)

        if $PKG_CONFIG --exists "$2" 2>&AS_MESSAGE_LOG_FD; then
            AC_MSG_RESULT(yes)
            succeeded=yes

            AC_MSG_CHECKING($1_CFLAGS)
            $1_CFLAGS=`$PKG_CONFIG --cflags "$2"|sed -e 's,///*,/,g'`
            AC_MSG_RESULT($$1_CFLAGS)

            AC_MSG_CHECKING($1_LIBS)
            $1_LIBS=`$PKG_CONFIG --libs "$2"|sed -e 's,///*,/,g'`
            AC_MSG_RESULT($$1_LIBS)
        else
            AC_MSG_RESULT(no)
            $1_CFLAGS=""
            $1_LIBS=""
            ## If we have a custom action on failure, don't print errors, but
            ## do set a variable so people can do so.
            $1_PKG_ERRORS=`$PKG_CONFIG --errors-to-stdout --print-errors "$2"`
            ifelse([$4], ,echo $$1_PKG_ERRORS,)
        fi

        AC_SUBST($1_CFLAGS)
        AC_SUBST($1_LIBS)
     else
        echo "*** Your version of pkg-config is too old. You need version $PKG_CONFIG_MIN_VERSION or newer."
        echo "*** See http://www.freedesktop.org/software/pkgconfig"
     fi
  fi

  if test $succeeded = yes; then
     ifelse([$3], , :, [$3])
  else
     ifelse([$4], , [AC_MSG_ERROR([Library requirements ($2) not met; consider adjusting the PKG_CONFIG_PATH environment variable if your libraries are in a nonstandard prefix so pkg-config can find them.])], [$4])
  fi
])


if test "${with_sound}" != "no"; then
  # Sound support for GNU/Linux and the free BSDs.
  AC_CHECK_HEADERS(machine/soundcard.h sys/soundcard.h soundcard.h)
  # Emulation library used on NetBSD.
  AC_CHECK_LIB(ossaudio, _oss_ioctl, LIBSOUND=-lossaudio, LIBSOUND=)
  AC_SUBST(LIBSOUND)

  ALSA_REQUIRED=1.0.0
  ALSA_MODULES="alsa >= $ALSA_REQUIRED"
  PKG_CHECK_MODULES(ALSA, $ALSA_MODULES, HAVE_ALSA=yes, HAVE_ALSA=no)
  if test $HAVE_ALSA = yes; then
    SAVE_CFLAGS="$CFLAGS"
    SAVE_LDFLAGS="$LDFLAGS"
    CFLAGS="$ALSA_CFLAGS $CFLAGS"
    LDFLAGS="$ALSA_LIBS $LDFLAGS"
    AC_TRY_COMPILE([#include <asoundlib.h>], [snd_lib_error_set_handler (0);],
                    emacs_alsa_normal=yes,
                    emacs_alsa_normal=no)
    if test "$emacs_alsa_normal" != yes; then
      AC_TRY_COMPILE([#include <alsa/asoundlib.h>],
                     [snd_lib_error_set_handler (0);],
                     emacs_alsa_subdir=yes,
                     emacs_alsa_subdir=no)
      if test "$emacs_alsa_subdir" != yes; then
        AC_MSG_ERROR([pkg-config found alsa, but it does not compile.  See config.log for error messages.])
      fi
      ALSA_CFLAGS="$ALSA_CFLAGS -DALSA_SUBDIR_INCLUDE"
    fi

    CFLAGS="$SAVE_CFLAGS"
    LDFLAGS="$SAVE_LDFLAGS"
    LIBSOUND="$LIBSOUND $ALSA_LIBS"
    CFLAGS_SOUND="$CFLAGS_SOUND $ALSA_CFLAGS"
    AC_DEFINE(HAVE_ALSA, 1, [Define to 1 if ALSA is available.])
  fi
  AC_SUBST(CFLAGS_SOUND)
fi

dnl checks for header files
AC_CHECK_HEADERS(sys/select.h sys/timeb.h sys/time.h unistd.h utime.h \
  linux/version.h sys/systeminfo.h termios.h limits.h string.h stdlib.h \
  termcap.h stdio_ext.h fcntl.h strings.h coff.h pty.h sys/mman.h \
  sys/param.h sys/vlimit.h sys/resource.h locale.h sys/_mbstate_t.h \
  sys/utsname.h pwd.h)

AC_MSG_CHECKING(if personality LINUX32 can be set)
AC_TRY_COMPILE([#include <sys/personality.h>], [personality (PER_LINUX32)],
               emacs_cv_personality_linux32=yes,
               emacs_cv_personality_linux32=no)
AC_MSG_RESULT($emacs_cv_personality_linux32)

if test $emacs_cv_personality_linux32 = yes; then
  AC_DEFINE(HAVE_PERSONALITY_LINUX32, 1,
            [Define to 1 if personality LINUX32 can be set.])
fi

dnl On Solaris 8 there's a compilation warning for term.h because
dnl it doesn't define `bool'.
AC_CHECK_HEADERS(term.h, , , -)
AC_HEADER_STDC
AC_HEADER_TIME
AC_CHECK_DECLS([sys_siglist])
if test $ac_cv_have_decl_sys_siglist != yes; then
  # For Tru64, at least:
  AC_CHECK_DECLS([__sys_siglist])
  if test $ac_cv_have_decl___sys_siglist = yes; then
    AC_DEFINE(sys_siglist, __sys_siglist,
              [Define to any substitute for sys_siglist.])
  fi
fi
AC_HEADER_SYS_WAIT

dnl Some systems have utime.h but don't declare the struct anyplace.
AC_CACHE_CHECK(for struct utimbuf, emacs_cv_struct_utimbuf,
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
#ifdef HAVE_UTIME_H
#include <utime.h>
#endif], [static struct utimbuf x; x.actime = x.modtime;],
  emacs_cv_struct_utimbuf=yes, emacs_cv_struct_utimbuf=no))
if test $emacs_cv_struct_utimbuf = yes; then
  AC_DEFINE(HAVE_STRUCT_UTIMBUF, 1, [Define to 1 if `struct utimbuf' is declared by <utime.h>.])
fi

dnl checks for typedefs
AC_TYPE_SIGNAL

dnl Check for speed_t typedef.
AC_CACHE_CHECK(for speed_t, emacs_cv_speed_t,
  [AC_TRY_COMPILE([#include <termios.h>], [speed_t x = 1;],
    emacs_cv_speed_t=yes, emacs_cv_speed_t=no)])
if test $emacs_cv_speed_t = yes; then
  AC_DEFINE(HAVE_SPEED_T, 1,
           [Define to 1 if `speed_t' is declared by <termios.h>.])
fi

AC_CACHE_CHECK(for struct timeval, emacs_cv_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;],
  emacs_cv_struct_timeval=yes, emacs_cv_struct_timeval=no))
HAVE_TIMEVAL=$emacs_cv_struct_timeval
if test $emacs_cv_struct_timeval = yes; then
  AC_DEFINE(HAVE_TIMEVAL, 1, [Define to 1 if `struct timeval' is declared by <sys/time.h>.])
fi

AC_CACHE_CHECK(for struct exception, emacs_cv_struct_exception,
AC_TRY_COMPILE([#include <math.h>],
[static struct exception x; x.arg1 = x.arg2 = x.retval; x.name = ""; x.type = 1;],
  emacs_cv_struct_exception=yes, emacs_cv_struct_exception=no))
HAVE_EXCEPTION=$emacs_cv_struct_exception
if test $emacs_cv_struct_exception != yes; then
  AC_DEFINE(NO_MATHERR, 1, [Define to 1 if you don't have struct exception in math.h.])
fi

AC_CHECK_HEADERS(sys/socket.h)
AC_CHECK_HEADERS(net/if.h, , , [AC_INCLUDES_DEFAULT
#if HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif])

dnl checks for structure members
AC_STRUCT_TM
AC_STRUCT_TIMEZONE
AC_CHECK_MEMBER(struct tm.tm_gmtoff,
                [AC_DEFINE(HAVE_TM_GMTOFF, 1,
                           [Define to 1 if `tm_gmtoff' is member of `struct tm'.])],,
                [#include <time.h>])
AC_CHECK_MEMBERS([struct ifreq.ifr_flags, struct ifreq.ifr_hwaddr,
                  struct ifreq.ifr_netmask, struct ifreq.ifr_broadaddr,
                  struct ifreq.ifr_addr], , ,
                 [AC_INCLUDES_DEFAULT
#if HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#if HAVE_NET_IF_H
#include <net/if.h>
#endif])

dnl checks for compiler characteristics

dnl Testing __STDC__ to determine prototype support isn't good enough.
dnl DEC C, for instance, doesn't define it with default options, and
dnl is used on 64-bit systems (OSF Alphas).  Similarly for volatile
dnl and void *.
AC_C_PROTOTYPES
AC_C_VOLATILE
AC_C_CONST
dnl This isn't useful because we can't turn on use of `inline' unless
dnl the compiler groks `extern inline'.
dnl AC_C_INLINE
AC_CACHE_CHECK([for void * support], emacs_cv_void_star,
  [AC_TRY_COMPILE(, [void * foo;],
                   emacs_cv_void_star=yes, emacs_cv_void_star=no)])
if test $emacs_cv_void_star = yes; then
  AC_DEFINE(POINTER_TYPE, void)
else
  AC_DEFINE(POINTER_TYPE, char)
fi
AH_TEMPLATE(POINTER_TYPE,
            [Define as `void' if your compiler accepts `void *'; otherwise
             define as `char'.])dnl



dnl This could be used for targets which can have both byte sexes.
dnl We could presumably replace the hardwired WORDS_BIG_ENDIAN generally.
dnl AC_C_BIGENDIAN

dnl check for Make feature
AC_PROG_MAKE_SET

dnl checks for operating system services
AC_SYS_LONG_FILE_NAMES

#### Choose a window system.

AC_PATH_X
if test "$no_x" = yes; then
  window_system=none
else
  window_system=x11
fi

## Workaround for bug in autoconf <= 2.62.
## http://lists.gnu.org/archive/html/emacs-devel/2008-04/msg01551.html
## No need to do anything special for these standard directories.
## This is an experiment, take it out if it causes problems.
if test -n "${x_libraries}" && test x"${x_libraries}" != xNONE; then

   x_libraries=`echo :${x_libraries}: | sed -e 's|:/usr/lib64:|:|g' -e 's|:/lib64:|:|g' -e 's|^:||' -e 's|:$||'`

fi

if test "${x_libraries}" != NONE; then
  if test -n "${x_libraries}"; then
    LD_SWITCH_X_SITE=-L`echo ${x_libraries} | sed -e "s/:/ -L/g"`
    LD_SWITCH_X_SITE_AUX=-R`echo ${x_libraries} | sed -e "s/:/ -R/g"`
  fi
  x_default_search_path=""
  x_search_path=${x_libraries}
  if test -z "${x_search_path}"; then
    x_search_path=/usr/lib
  fi
  for x_library in `echo ${x_search_path}: | \
                    sed -e "s/:/ /g" -e p -e "s:/lib[[^ /]]* :/share :g"`; do
    x_search_path="\
${x_library}/X11/%L/%T/%N%C%S:\
${x_library}/X11/%l/%T/%N%C%S:\
${x_library}/X11/%T/%N%C%S:\
${x_library}/X11/%L/%T/%N%S:\
${x_library}/X11/%l/%T/%N%S:\
${x_library}/X11/%T/%N%S"
    if test x"${x_default_search_path}" = x; then
      x_default_search_path=${x_search_path}
    else
      x_default_search_path="${x_search_path}:${x_default_search_path}"
    fi
  done
fi
if test "${x_includes}" != NONE && test -n "${x_includes}"; then
  C_SWITCH_X_SITE=-I`echo ${x_includes} | sed -e "s/:/ -I/g"`
fi

if test x"${x_includes}" = x; then
  bitmapdir=/usr/include/X11/bitmaps
else
  # accumulate include directories that have X11 bitmap subdirectories
  bmd_acc="dummyval"
  for bmd in `echo ${x_includes} | sed -e "s/:/ /g"`; do
    if test -d "${bmd}/X11/bitmaps"; then
      bmd_acc="${bmd_acc}:${bmd}/X11/bitmaps"
    fi
    if test -d "${bmd}/bitmaps"; then
      bmd_acc="${bmd_acc}:${bmd}/bitmaps"
    fi
  done
  if test ${bmd_acc} != "dummyval"; then
    bitmapdir=`echo ${bmd_acc} | sed -e "s/^dummyval://"`
  fi
fi

HAVE_NS=no
NS_IMPL_COCOA=no
NS_IMPL_GNUSTEP=no
tmp_CPPFLAGS="$CPPFLAGS"
tmp_CFLAGS="$CFLAGS"
CPPFLAGS="$CPPFLAGS -x objective-c"
CFLAGS="$CFLAGS -x objective-c"
if test "${with_ns}" != no; then
  if test "${opsys}" = darwin; then
     NS_IMPL_COCOA=yes
     ns_appdir=`pwd`/nextstep/Emacs.app
     ns_appbindir=`pwd`/nextstep/Emacs.app/Contents/MacOS
     ns_appresdir=`pwd`/nextstep/Emacs.app/Contents/Resources
     ns_appsrc=${srcdir}/nextstep/Cocoa/Emacs.base
  elif test -f $GNUSTEP_CONFIG_FILE; then
     NS_IMPL_GNUSTEP=yes
     ns_appdir=`pwd`/nextstep/Emacs.app
     ns_appbindir=`pwd`/nextstep/Emacs.app
     ns_appresdir=`pwd`/nextstep/Emacs.app/Resources
     ns_appsrc=${srcdir}/nextstep/GNUstep/Emacs.base
     dnl FIXME sourcing this 3 times in subshells seems inefficient.
     GNUSTEP_MAKEFILES="$(. $GNUSTEP_CONFIG_FILE; echo $GNUSTEP_MAKEFILES)"
     GNUSTEP_SYSTEM_HEADERS="$(. $GNUSTEP_CONFIG_FILE; echo $GNUSTEP_SYSTEM_HEADERS)"
     GNUSTEP_SYSTEM_LIBRARIES="$(. $GNUSTEP_CONFIG_FILE; echo $GNUSTEP_SYSTEM_LIBRARIES)"
     CPPFLAGS="$CPPFLAGS -I${GNUSTEP_SYSTEM_HEADERS}"
     CFLAGS="$CFLAGS -I${GNUSTEP_SYSTEM_HEADERS}"
     REAL_CFLAGS="$REAL_CFLAGS -I${GNUSTEP_SYSTEM_HEADERS}"
     LDFLAGS="$LDFLAGS -L${GNUSTEP_SYSTEM_LIBRARIES}"
  fi
  AC_CHECK_HEADER([AppKit/AppKit.h], [HAVE_NS=yes],
                  [AC_MSG_ERROR([`--with-ns' was specified, but the include
  files are missing or cannot be compiled.])])
  NS_HAVE_NSINTEGER=yes
  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <Foundation/NSObjCRuntime.h>],
                                     [NSInteger i;])],
                    ns_have_nsinteger=yes,
                    ns_have_nsinteger=no)
  if test $ns_have_nsinteger = no; then
    NS_HAVE_NSINTEGER=no
  fi
fi
if test "${HAVE_NS}" = yes; then
  window_system=nextstep
  with_xft=no
  # set up packaging dirs
  exec_prefix=${ns_appbindir}
  libexecdir=${ns_appbindir}/libexec
  if test "${EN_NS_SELF_CONTAINED}" = yes; then
     prefix=${ns_appresdir}
  fi
fi
CFLAGS="$tmp_CFLAGS"
CPPFLAGS="$tmp_CPPFLAGS"

case "${window_system}" in
  x11 )
    HAVE_X_WINDOWS=yes
    HAVE_X11=yes
    case "${with_x_toolkit}" in
      athena | lucid ) USE_X_TOOLKIT=LUCID ;;
      motif ) USE_X_TOOLKIT=MOTIF ;;
      gtk ) with_gtk=yes
dnl Dont set this for GTK.  A lot of tests below assumes Xt when
dnl USE_X_TOOLKIT is set.
            USE_X_TOOLKIT=none ;;
      no ) USE_X_TOOLKIT=none ;;
dnl If user did not say whether to use a toolkit, make this decision later:
dnl use the toolkit if we have gtk, or X11R5 or newer.
      * ) USE_X_TOOLKIT=maybe ;;
    esac
  ;;
  nextstep | none )
    HAVE_X_WINDOWS=no
    HAVE_X11=no
    USE_X_TOOLKIT=none
  ;;
esac

if test "$window_system" = none && test "X$with_x" != "Xno"; then
   AC_CHECK_PROG(HAVE_XSERVER, X, true, false)
   if test "$HAVE_XSERVER" = true ||
      test -n "$DISPLAY" ||
      test "`echo /usr/lib/libX11.*`" != "/usr/lib/libX11.*"; then
        AC_MSG_ERROR([You seem to be running X, but no X development libraries
were found.  You should install the relevant development files for X
and for the toolkit you want, such as Gtk+, Lesstif or Motif.  Also make
sure you have development files for image handling, i.e.
tiff, gif, jpeg, png and xpm.
If you are sure you want Emacs compiled without X window support, pass
  --without-x
to configure.])
   fi
fi

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

# Do the opsystem or machine files prohibit the use of the GNU malloc?
# Assume not, until told otherwise.
GNU_MALLOC=yes
doug_lea_malloc=yes
AC_CHECK_FUNC(malloc_get_state, ,doug_lea_malloc=no)
AC_CHECK_FUNC(malloc_set_state, ,doug_lea_malloc=no)
AC_CACHE_CHECK(whether __after_morecore_hook exists,
               emacs_cv_var___after_morecore_hook,
[AC_TRY_LINK([extern void (* __after_morecore_hook)();],[__after_morecore_hook = 0],
  emacs_cv_var___after_morecore_hook=yes,
  emacs_cv_var___after_morecore_hook=no)])
if test $emacs_cv_var___after_morecore_hook = no; then
  doug_lea_malloc=no
fi
if test "${system_malloc}" = "yes"; then
  GNU_MALLOC=no
  GNU_MALLOC_reason="
    (The GNU allocators don't work with this system configuration.)"
fi
if test "$doug_lea_malloc" = "yes" ; then
  if test "$GNU_MALLOC" = yes ; then
    GNU_MALLOC_reason="
      (Using Doug Lea's new malloc from the GNU C Library.)"
  fi
  AC_DEFINE(DOUG_LEA_MALLOC, 1,
            [Define to 1 if you are using the GNU C Library.])
fi

if test x"${REL_ALLOC}" = x; then
  REL_ALLOC=${GNU_MALLOC}
fi

dnl For now, need to use an explicit `#define USE_MMAP_FOR_BUFFERS 1'
dnl the system configuration file (s/*.h) to turn the use of mmap
dnl in the relocating allocator on.

AC_FUNC_MMAP
if test $use_mmap_for_buffers = yes; then
  REL_ALLOC=no
fi

LIBS="$libsrc_libs $LIBS"

dnl If found, this defines HAVE_LIBDNET, which m/pmax.h checks,
dnl and also adds -ldnet to LIBS, which Autoconf uses for checks.
AC_CHECK_LIB(dnet, dnet_ntoa)
dnl This causes -lresolv to get used in subsequent tests,
dnl which causes failures on some systems such as HPUX 9.
dnl AC_CHECK_LIB(resolv, gethostbyname)

dnl FIXME replace main with a function we actually want from this library.
AC_CHECK_LIB(Xbsd, main, LD_SWITCH_X_SITE="$LD_SWITCH_X_SITE -lXbsd")

AC_CHECK_LIB(pthreads, cma_open)

dnl Check for need for bigtoc support on IBM AIX

case ${host_os} in
aix*)
  AC_CACHE_CHECK([for -bbigtoc option], [gdb_cv_bigtoc], [
    case $GCC in
    yes) gdb_cv_bigtoc=-Wl,-bbigtoc ;;
    *) gdb_cv_bigtoc=-bbigtoc ;;
    esac

    LDFLAGS=$LDFLAGS\ $gdb_cv_bigtoc
    AC_TRY_LINK([], [int i;], [], [gdb_cv_bigtoc=])
  ])
  ;;
esac

# Change CFLAGS and CPPFLAGS temporarily so that C_SWITCH_X_SITE gets
# used for the tests that follow.  We set them back to REAL_CFLAGS and
# REAL_CPPFLAGS later on.

REAL_CPPFLAGS="$CPPFLAGS"

if test "${HAVE_X11}" = "yes"; then
  DEFS="$C_SWITCH_X_SITE $DEFS"
  LDFLAGS="$LDFLAGS $LD_SWITCH_X_SITE"
  LIBS="$LIBX $LIBS"
  CFLAGS="$C_SWITCH_X_SITE $CFLAGS"
  CPPFLAGS="$C_SWITCH_X_SITE $CPPFLAGS"

  # On Solaris, arrange for LD_RUN_PATH to point to the X libraries for tests.
  # This is handled by LD_SWITCH_X_SITE_AUX during the real build,
  # but it's more convenient here to set LD_RUN_PATH
  # since this also works on hosts that don't understand LD_SWITCH_X_SITE_AUX.
  if test "${x_libraries}" != NONE && test -n "${x_libraries}"; then
    LD_RUN_PATH=$x_libraries${LD_RUN_PATH+:}$LD_RUN_PATH
    export LD_RUN_PATH
  fi

  if test "${opsys}" = "gnu-linux"; then
    AC_MSG_CHECKING(whether X on GNU/Linux needs -b to link)
    AC_TRY_LINK([],
     [XOpenDisplay ("foo");],
     [xlinux_first_failure=no],
     [xlinux_first_failure=yes])
    if test "${xlinux_first_failure}" = "yes"; then
      OLD_LD_SWITCH_X_SITE="$LD_SWITCH_X_SITE"
      OLD_C_SWITCH_X_SITE="$C_SWITCH_X_SITE"
      OLD_CPPFLAGS="$CPPFLAGS"
      OLD_LIBS="$LIBS"
      LD_SWITCH_X_SITE="$LD_SWITCH_X_SITE -b i486-linuxaout"
      C_SWITCH_X_SITE="$C_SWITCH_X_SITE -b i486-linuxaout"
      CPPFLAGS="$CPPFLAGS -b i486-linuxaout"
      LIBS="$LIBS -b i486-linuxaout"
      AC_TRY_LINK([],
       [XOpenDisplay ("foo");],
       [xlinux_second_failure=no],
       [xlinux_second_failure=yes])
      if test "${xlinux_second_failure}" = "yes"; then
        # If we get the same failure with -b, there is no use adding -b.
        # So take it out.  This plays safe.
        LD_SWITCH_X_SITE="$OLD_LD_SWITCH_X_SITE"
        C_SWITCH_X_SITE="$OLD_C_SWITCH_X_SITE"
        CPPFLAGS="$OLD_CPPFLAGS"
        LIBS="$OLD_LIBS"
        AC_MSG_RESULT(no)
      else
        AC_MSG_RESULT(yes)
      fi
    else
      AC_MSG_RESULT(no)
    fi
  fi

  # Reportedly, some broken Solaris systems have XKBlib.h but are missing
  # header files included from there.
  AC_MSG_CHECKING(for Xkb)
  AC_TRY_LINK([#include <X11/Xlib.h>
#include <X11/XKBlib.h>],
        [XkbDescPtr kb = XkbGetKeyboard (0, XkbAllComponentsMask, XkbUseCoreKbd);],
        emacs_xkb=yes, emacs_xkb=no)
  AC_MSG_RESULT($emacs_xkb)
  if test $emacs_xkb = yes; then
    AC_DEFINE(HAVE_XKBGETKEYBOARD, 1, [Define to 1 if you have the XkbGetKeyboard function.])
  fi

  AC_CHECK_FUNCS(XrmSetDatabase XScreenResourceString \
XScreenNumberOfScreen XSetWMProtocols)
fi

if test "${window_system}" = "x11"; then
  AC_MSG_CHECKING(X11 version 6)
  AC_CACHE_VAL(emacs_cv_x11_version_6,
  [AC_TRY_LINK([#include <X11/Xlib.h>],
[#if XlibSpecificationRelease < 6
fail;
#endif
], emacs_cv_x11_version_6=yes, emacs_cv_x11_version_6=no)])
  if test $emacs_cv_x11_version_6 = yes; then
    AC_MSG_RESULT(6 or newer)
    AC_DEFINE(HAVE_X11R6, 1,
              [Define to 1 if you have the X11R6 or newer version of Xlib.])
  else
    AC_MSG_RESULT(before 6)
  fi
fi


### Use -lrsvg-2 if available, unless `--with-rsvg=no' is specified.
HAVE_RSVG=no
if test "${HAVE_X11}" = "yes" || test "${HAVE_NS}" = "yes"; then
  if test "${with_rsvg}" != "no"; then
    RSVG_REQUIRED=2.11.0
    RSVG_MODULE="librsvg-2.0 >= $RSVG_REQUIRED"

    PKG_CHECK_MODULES(RSVG, $RSVG_MODULE, :, :)
    AC_SUBST(RSVG_CFLAGS)
    AC_SUBST(RSVG_LIBS)

    if test ".${RSVG_CFLAGS}" != "."; then
      HAVE_RSVG=yes
      AC_DEFINE(HAVE_RSVG, 1, [Define to 1 if using librsvg.])
      CFLAGS="$CFLAGS $RSVG_CFLAGS"
      LIBS="$RSVG_LIBS $LIBS"
    fi
  fi
fi


HAVE_GTK=no
if test "${with_gtk}" = "yes" || test "$USE_X_TOOLKIT" = "maybe"; then
  GLIB_REQUIRED=2.6
  GTK_REQUIRED=2.6
  GTK_MODULES="gtk+-2.0 >= $GTK_REQUIRED glib-2.0 >= $GLIB_REQUIRED"

  dnl Checks for libraries.
  PKG_CHECK_MODULES(GTK, $GTK_MODULES, pkg_check_gtk=yes, pkg_check_gtk=no)
  if test "$pkg_check_gtk" = "no" && test "$USE_X_TOOLKIT" != "maybe"; then
     AC_MSG_ERROR($GTK_PKG_ERRORS)
  fi
fi


if test x"$pkg_check_gtk" = xyes; then

  AC_SUBST(GTK_CFLAGS)
  AC_SUBST(GTK_LIBS)
  C_SWITCH_X_SITE="$C_SWITCH_X_SITE $GTK_CFLAGS"
  CFLAGS="$CFLAGS $GTK_CFLAGS"
  LIBS="$GTK_LIBS $LIBS"
  dnl Try to compile a simple GTK program.
  GTK_COMPILES=no
  AC_CHECK_FUNCS(gtk_main, GTK_COMPILES=yes)
  if test "${GTK_COMPILES}" != "yes"; then
    if test "$USE_X_TOOLKIT" != "maybe"; then
      AC_MSG_ERROR([Gtk+ wanted, but it does not compile, see config.log.  Maybe some x11-devel files missing?]);
    fi
  else
    HAVE_GTK=yes
    AC_DEFINE(USE_GTK, 1, [Define to 1 if using GTK.])
    USE_X_TOOLKIT=none
    if $PKG_CONFIG --atleast-version=2.10 gtk+-2.0; then
      :
    else
      AC_MSG_WARN([[Your version of Gtk+ will have problems with
       closing open displays.  This is no problem if you just use
       one display, but if you use more than one and close one of them
       Emacs may crash.]])
      sleep 3
    fi
  fi

fi


if test "${HAVE_GTK}" = "yes"; then

  dnl  GTK scrollbars resemble toolkit scrollbars a lot, so to avoid
  dnl  a lot if #ifdef:s, say we have toolkit scrollbars.
  if test "$with_toolkit_scroll_bars" != no; then
    with_toolkit_scroll_bars=yes
  fi

  dnl  Check if we can use multiple displays with this GTK version.
  dnl  If gdk_display_open exists, assume all others are there also.
  HAVE_GTK_MULTIDISPLAY=no
  AC_CHECK_FUNCS(gdk_display_open, HAVE_GTK_MULTIDISPLAY=yes)
  if test "${HAVE_GTK_MULTIDISPLAY}" = "yes"; then
    AC_DEFINE(HAVE_GTK_MULTIDISPLAY, 1,
              [Define to 1 if GTK can handle more than one display.])
  fi

  dnl  Check if we have the old file selection dialog declared and
  dnl  in the link library.  In 2.x it may be in the library,
  dnl  but not declared if deprecated featured has been selected out.
  dnl  AC_CHECK_DECL checks for a macro, so check for GTK_TYPE_FILE_SELECTION.
  HAVE_GTK_FILE_SELECTION=no
  AC_CHECK_DECL(GTK_TYPE_FILE_SELECTION, HAVE_GTK_FILE_SELECTION=yes,
                   HAVE_GTK_FILE_SELECTION=no, [AC_INCLUDES_DEFAULT
#include <gtk/gtk.h>])
  if test "$HAVE_GTK_FILE_SELECTION" = yes; then
    AC_CHECK_FUNCS(gtk_file_selection_new, HAVE_GTK_FILE_SELECTION=yes,
                   HAVE_GTK_FILE_SELECTION=no)
  fi

  dnl  Check if we have the new file chooser dialog
  HAVE_GTK_FILE_CHOOSER=no
  AC_CHECK_DECL(GTK_TYPE_FILE_CHOOSER, HAVE_GTK_FILE_CHOOSER=yes,
                HAVE_GTK_FILE_CHOOSER=no, [AC_INCLUDES_DEFAULT
#include <gtk/gtk.h>])
  if test "$HAVE_GTK_FILE_CHOOSER" = yes; then
    AC_CHECK_FUNCS(gtk_file_chooser_dialog_new, HAVE_GTK_FILE_CHOOSER=yes,
                   HAVE_GTK_FILE_CHOOSER=no)
  fi

  if test "$HAVE_GTK_FILE_SELECTION" = yes \
     && test "$HAVE_GTK_FILE_CHOOSER" = yes;  then
    AC_DEFINE(HAVE_GTK_FILE_BOTH, 1,
              [Define to 1 if GTK has both file selection and chooser dialog.])
  fi

  dnl Check if pthreads are available.  Emacs only needs this when using
  dnl gtk_file_chooser under Gnome.
  if test "$HAVE_GTK_FILE_CHOOSER" = yes; then
    HAVE_GTK_AND_PTHREAD=no
    AC_CHECK_HEADERS(pthread.h)
    if test "$ac_cv_header_pthread_h"; then
      AC_CHECK_LIB(pthread, pthread_self, HAVE_GTK_AND_PTHREAD=yes)
    fi
    if test "$HAVE_GTK_AND_PTHREAD" = yes; then
      case "${canonical}" in
        *-hpux*) ;;
        *) GTK_LIBS="$GTK_LIBS -lpthread" ;;
      esac
      AC_DEFINE(HAVE_GTK_AND_PTHREAD, 1,
               [Define to 1 if you have GTK and pthread (-lpthread).])
    fi
  fi
fi

dnl D-Bus has been tested under GNU/Linux only.  Must be adapted for
dnl other platforms.  Support for higher D-Bus versions than 1.0 is
dnl also not configured.
HAVE_DBUS=no
if test "${with_dbus}" = "yes"; then
   PKG_CHECK_MODULES(DBUS, dbus-1 >= 1.0, HAVE_DBUS=yes, HAVE_DBUS=no)
   if test "$HAVE_DBUS" = yes; then
     LIBS="$LIBS $DBUS_LIBS"
     AC_DEFINE(HAVE_DBUS, 1, [Define to 1 if using D-Bus.])
     AC_CHECK_FUNCS([dbus_watch_get_unix_fd])
   fi
fi

dnl Do not put whitespace before the #include statements below.
dnl Older compilers (eg sunos4 cc) choke on it.
HAVE_XAW3D=no
if test x"${USE_X_TOOLKIT}" = xmaybe || test x"${USE_X_TOOLKIT}" = xLUCID; then
  if test "$with_xaw3d" != no; then
    AC_MSG_CHECKING(for xaw3d)
    AC_CACHE_VAL(emacs_cv_xaw3d,
    [AC_TRY_LINK([
#include <X11/Intrinsic.h>
#include <X11/Xaw3d/Simple.h>],
      [],
      emacs_cv_xaw3d=yes,
      emacs_cv_xaw3d=no)])
  else
    emacs_cv_xaw3d=no
  fi
  if test $emacs_cv_xaw3d = yes; then
    AC_MSG_RESULT([yes; using Lucid toolkit])
    USE_X_TOOLKIT=LUCID
    HAVE_XAW3D=yes
    AC_DEFINE(HAVE_XAW3D, 1,
              [Define to 1 if you have the Xaw3d library (-lXaw3d).])
  else
    AC_MSG_RESULT(no)
    AC_MSG_CHECKING(for libXaw)
    AC_CACHE_VAL(emacs_cv_xaw,
    [AC_TRY_LINK([
#include <X11/Intrinsic.h>
#include <X11/Xaw/Simple.h>],
      [],
      emacs_cv_xaw=yes,
      emacs_cv_xaw=no)])
    if test $emacs_cv_xaw = yes; then
      AC_MSG_RESULT([yes; using Lucid toolkit])
      USE_X_TOOLKIT=LUCID
    elif test x"${USE_X_TOOLKIT}" = xLUCID; then
      AC_MSG_ERROR([Lucid toolkit requires X11/Xaw include files])
    else
      AC_MSG_RESULT([no; do not use toolkit by default])
      USE_X_TOOLKIT=none
    fi
  fi
fi

X_TOOLKIT_TYPE=$USE_X_TOOLKIT

if test "${USE_X_TOOLKIT}" != "none"; then
  AC_MSG_CHECKING(X11 toolkit version)
  AC_CACHE_VAL(emacs_cv_x11_toolkit_version_6,
  [AC_TRY_LINK([#include <X11/Intrinsic.h>],
[#if XtSpecificationRelease < 6
fail;
#endif
], emacs_cv_x11_toolkit_version_6=yes, emacs_cv_x11_toolkit_version_6=no)])
  HAVE_X11XTR6=$emacs_cv_x11_toolkit_version_6
  if test $emacs_cv_x11_toolkit_version_6 = yes; then
    AC_MSG_RESULT(6 or newer)
    AC_DEFINE(HAVE_X11XTR6, 1,
              [Define to 1 if you have the X11R6 or newer version of Xt.])
  else
    AC_MSG_RESULT(before 6)
  fi

dnl If using toolkit, check whether libXmu.a exists.
dnl tranle@intellicorp.com says libXmu.a can need XtMalloc in libXt.a to link.
  OLDLIBS="$LIBS"
  if test x$HAVE_X11XTR6 = xyes; then
    LIBS="-lXt -lSM -lICE $LIBS"
  else
    LIBS="-lXt $LIBS"
  fi
  AC_CHECK_LIB(Xmu, XmuConvertStandardSelection)
  test $ac_cv_lib_Xmu_XmuConvertStandardSelection = no && LIBS="$OLDLIBS"
fi

# On Irix 6.5, at least, we need XShapeQueryExtension from -lXext for Xaw3D.
if test "${HAVE_X11}" = "yes"; then
  if test "${USE_X_TOOLKIT}" != "none"; then
    AC_CHECK_LIB(Xext, XShapeQueryExtension)
  fi
fi

if test "${USE_X_TOOLKIT}" = "MOTIF"; then
  AC_CACHE_CHECK(for Motif version 2.1, emacs_cv_motif_version_2_1,
  [AC_TRY_COMPILE([#include <Xm/Xm.h>],
    [#if XmVERSION > 2 || (XmVERSION == 2 && XmREVISION >= 1)
int x = 5;
#else
Motif version prior to 2.1.
#endif],
    emacs_cv_motif_version_2_1=yes, emacs_cv_motif_version_2_1=no)])
  HAVE_MOTIF_2_1=$emacs_cv_motif_version_2_1
  if test $emacs_cv_motif_version_2_1 = yes; then
    HAVE_LIBXP=no
    AC_DEFINE(HAVE_MOTIF_2_1, 1,
              [Define to 1 if you have Motif 2.1 or newer.])
    AC_CHECK_LIB(Xp, XpCreateContext, HAVE_LIBXP=yes)
    if test ${HAVE_LIBXP} = yes; then
      AC_DEFINE(HAVE_LIBXP, 1,
                [Define to 1 if you have the Xp library (-lXp).])
    fi
  else
    AC_CACHE_CHECK(for LessTif where some systems put it, emacs_cv_lesstif,
    # We put this in CFLAGS temporarily to precede other -I options
    # that might be in CFLAGS temporarily.
    # We put this in CPPFLAGS where it precedes the other -I options.
    OLD_CPPFLAGS=$CPPFLAGS
    OLD_CFLAGS=$CFLAGS
    CPPFLAGS="-I/usr/X11R6/LessTif/Motif1.2/include $CPPFLAGS"
    CFLAGS="-I/usr/X11R6/LessTif/Motif1.2/include $CFLAGS"
    [AC_TRY_COMPILE([#include </usr/X11R6/LessTif/Motif1.2/include/Xm/Xm.h>],
      [int x = 5;],
      emacs_cv_lesstif=yes, emacs_cv_lesstif=no)])
    if test $emacs_cv_lesstif = yes; then
      # Make sure this -I option remains in CPPFLAGS after it is set
      # back to REAL_CPPFLAGS.
      # There is no need to change REAL_CFLAGS, because REAL_CFLAGS does not
      # have those other -I options anyway.  Ultimately, having this
      # directory ultimately in CPPFLAGS will be enough.
      REAL_CPPFLAGS="-I/usr/X11R6/LessTif/Motif1.2/include $REAL_CPPFLAGS"
      LDFLAGS="-L/usr/X11R6/LessTif/Motif1.2/lib $LDFLAGS"
    else
      CFLAGS=$OLD_CFLAGS
      CPPFLAGS=$OLD_CPPFLAGS
    fi
  fi
fi

dnl Use toolkit scroll bars if configured for GTK or X toolkit and either
dnl using Motif or Xaw3d is available, and unless
dnl --with-toolkit-scroll-bars=no was specified.

AH_TEMPLATE(USE_TOOLKIT_SCROLL_BARS,
            [Define to 1 if we should use toolkit scroll bars.])dnl
USE_TOOLKIT_SCROLL_BARS=no
if test "${with_toolkit_scroll_bars}" != "no"; then
  if test "${USE_X_TOOLKIT}" != "none"; then
    if test "${USE_X_TOOLKIT}" = "MOTIF"; then
      AC_DEFINE(USE_TOOLKIT_SCROLL_BARS)
      HAVE_XAW3D=no
      USE_TOOLKIT_SCROLL_BARS=yes
    elif test "${HAVE_XAW3D}" = "yes"; then
      AC_DEFINE(USE_TOOLKIT_SCROLL_BARS)
      USE_TOOLKIT_SCROLL_BARS=yes
    fi
  elif test "${HAVE_GTK}" = "yes"; then
    AC_DEFINE(USE_TOOLKIT_SCROLL_BARS)
    USE_TOOLKIT_SCROLL_BARS=yes
  elif test "${HAVE_NS}" = "yes"; then
    AC_DEFINE(USE_TOOLKIT_SCROLL_BARS)
    USE_TOOLKIT_SCROLL_BARS=yes
  fi
fi

dnl See if XIM is available.
AC_TRY_COMPILE([
          #include <X11/Xlib.h>
          #include <X11/Xresource.h>],
         [XIMProc  callback;],
         [HAVE_XIM=yes
         AC_DEFINE(HAVE_XIM, 1, [Define to 1 if XIM is available])],
         HAVE_XIM=no)

dnl `--with-xim' now controls only the initial value of use_xim at run time.

if test "${with_xim}" != "no"; then
  AC_DEFINE(USE_XIM, 1,
            [Define to 1 if we should use XIM, if it is available.])
fi


if test "${HAVE_XIM}" != "no"; then
  late_CFLAGS=$CFLAGS
  if test "$GCC" = yes; then
    CFLAGS="$CFLAGS --pedantic-errors"
  fi
  AC_TRY_COMPILE([
#include <X11/Xlib.h>
#include <X11/Xresource.h>],
[Display *display;
XrmDatabase db;
char *res_name;
char *res_class;
XIMProc  callback;
XPointer *client_data;
#ifndef __GNUC__
/* If we're not using GCC, it's probably not XFree86, and this is
   probably right, but we can't use something like --pedantic-errors.  */
extern Bool XRegisterIMInstantiateCallback(Display*, XrmDatabase, char*,
                                           char*, XIMProc, XPointer*);
#endif
(void)XRegisterIMInstantiateCallback(display, db, res_name, res_class, callback,
   client_data);],
    [emacs_cv_arg6_star=yes])
  AH_TEMPLATE(XRegisterIMInstantiateCallback_arg6,
         [Define to the type of the 6th arg of XRegisterIMInstantiateCallback,
either XPointer or XPointer*.])dnl
  if test "$emacs_cv_arg6_star" = yes; then
    AC_DEFINE(XRegisterIMInstantiateCallback_arg6, [XPointer*])
  else
    AC_DEFINE(XRegisterIMInstantiateCallback_arg6, [XPointer])
  fi
  CFLAGS=$late_CFLAGS
fi

### Start of font-backend (under any platform) section.
# (nothing here yet -- this is a placeholder)
### End of font-backend (under any platform) section.

### Start of font-backend (under X11) section.
if test "${HAVE_X11}" = "yes"; then
   PKG_CHECK_MODULES(FONTCONFIG, fontconfig >= 2.2.0, HAVE_FC=yes, HAVE_FC=no)

   ## Use -lXft if available, unless `--with-xft=no'.
   HAVE_XFT=maybe
    if test "${HAVE_FC}" = "no" || test "x${with_x}" = "xno"; then
      with_xft="no";
    fi
    if test "x${with_xft}" != "xno"; then

      PKG_CHECK_MODULES(XFT, xft >= 0.13.0, , HAVE_XFT=no)
      if test "$HAVE_XFT" != no; then
        OLD_CPPFLAGS="$CPPFLAGS"
        OLD_CFLAGS="$CFLAGS"
        OLD_LIBS="$LIBS"
        CPPFLAGS="$CPPFLAGS $XFT_CFLAGS"
        CFLAGS="$CFLAGS $XFT_CFLAGS"
        LIBS="$XFT_LIBS $LIBS"
        AC_CHECK_HEADER(X11/Xft/Xft.h,
          AC_CHECK_LIB(Xft, XftFontOpen, HAVE_XFT=yes, , $XFT_LIBS))

        if test "${HAVE_XFT}" = "yes"; then
          AC_DEFINE(HAVE_XFT, 1, [Define to 1 if you have the Xft library.])
            AC_SUBST(XFT_LIBS)
          C_SWITCH_X_SITE="$C_SWITCH_X_SITE $XFT_CFLAGS"
        else
          CPPFLAGS="$OLD_CPPFLAGS"
          CFLAGS="$OLD_CFLAGS"
          LIBS="$OLD_LIBS"
        fi                        # "${HAVE_XFT}" = "yes"
      fi                          # "$HAVE_XFT" != no
    fi                            # "x${with_xft}" != "xno"

    dnl For the "Does Emacs use" message at the end.
    if test "$HAVE_XFT" != "yes"; then
       HAVE_XFT=no
    fi


    HAVE_FREETYPE=no
    ## We used to allow building with FreeType and without Xft.
    ## However, the ftx font backend driver is not in good shape.
    if test "${HAVE_XFT}" = "yes"; then
      dnl As we use Xft, we anyway use freetype.
      dnl There's no need for additional CFLAGS and LIBS.
      HAVE_FREETYPE=yes
      FONTCONFIG_CFLAGS=
      FONTCONFIG_LIBS=
    fi

    HAVE_LIBOTF=no
    if test "${HAVE_FREETYPE}" = "yes"; then
      AC_DEFINE(HAVE_FREETYPE, 1,
                [Define to 1 if using the freetype and fontconfig libraries.])
      if test "${with_libotf}" != "no"; then
        PKG_CHECK_MODULES(LIBOTF, libotf, HAVE_LIBOTF=yes,
                          HAVE_LIBOTF=no)
        if test "$HAVE_LIBOTF" = "yes"; then
          AC_DEFINE(HAVE_LIBOTF, 1, [Define to 1 if using libotf.])
          AC_CHECK_LIB(otf, OTF_get_variation_glyphs,
                       HAVE_OTF_GET_VARIATION_GLYPHS=yes,
                       HAVE_OTF_GET_VARIATION_GLYPHS=no)
          if test "${HAVE_OTF_GET_VARIATION_GLYPHS}" = "yes"; then
            AC_DEFINE(HAVE_OTF_GET_VARIATION_GLYPHS, 1,
                      [Define to 1 if libotf has OTF_get_variation_glyphs.])
          fi
        fi
      fi
    dnl FIXME should there be an error if HAVE_FREETYPE != yes?
    dnl Does the new font backend require it, or can it work without it?
    fi

    HAVE_M17N_FLT=no
    if test "${HAVE_LIBOTF}" = yes; then
      if test "${with_m17n_flt}" != "no"; then
        PKG_CHECK_MODULES(M17N_FLT, m17n-flt, HAVE_M17N_FLT=yes, HAVE_M17N_FLT=no)
        if test "$HAVE_M17N_FLT" = "yes"; then
          AC_DEFINE(HAVE_M17N_FLT, 1, [Define to 1 if using libm17n-flt.])
        fi
      fi
    fi
else
    HAVE_XFT=no
    HAVE_FREETYPE=no
    HAVE_LIBOTF=no
    HAVE_M17N_FLT=no
fi
### End of font-backend (under X11) section.

AC_SUBST(FREETYPE_CFLAGS)
AC_SUBST(FREETYPE_LIBS)
AC_SUBST(FONTCONFIG_CFLAGS)
AC_SUBST(FONTCONFIG_LIBS)
AC_SUBST(LIBOTF_CFLAGS)
AC_SUBST(LIBOTF_LIBS)
AC_SUBST(M17N_FLT_CFLAGS)
AC_SUBST(M17N_FLT_LIBS)

### Use -lXpm if available, unless `--with-xpm=no'.
HAVE_XPM=no
if test "${HAVE_X11}" = "yes"; then
  if test "${with_xpm}" != "no"; then
    AC_CHECK_HEADER(X11/xpm.h,
      [AC_CHECK_LIB(Xpm, XpmReadFileToPixmap, HAVE_XPM=yes, , -lX11)])
    if test "${HAVE_XPM}" = "yes"; then
      AC_MSG_CHECKING(for XpmReturnAllocPixels preprocessor define)
      AC_EGREP_CPP(no_return_alloc_pixels,
      [#include "X11/xpm.h"
#ifndef XpmReturnAllocPixels
no_return_alloc_pixels
#endif
      ], HAVE_XPM=no, HAVE_XPM=yes)

      if test "${HAVE_XPM}" = "yes"; then
        AC_MSG_RESULT(yes)
      else
        AC_MSG_RESULT(no)
      fi
    fi
  fi

  if test "${HAVE_XPM}" = "yes"; then
    AC_DEFINE(HAVE_XPM, 1, [Define to 1 if you have the Xpm libary (-lXpm).])
  fi
fi

### Use -ljpeg if available, unless `--with-jpeg=no'.
HAVE_JPEG=no
if test "${HAVE_X11}" = "yes"; then
  if test "${with_jpeg}" != "no"; then
    dnl Checking for jpeglib.h can lose because of a redefinition of
    dnl  HAVE_STDLIB_H.
    AC_CHECK_HEADER(jerror.h,
      [AC_CHECK_LIB(jpeg, jpeg_destroy_compress, HAVE_JPEG=yes)])
  fi

  AH_TEMPLATE(HAVE_JPEG, [Define to 1 if you have the jpeg library (-ljpeg).])dnl
  if test "${HAVE_JPEG}" = "yes"; then
    AC_DEFINE(HAVE_JPEG)
    AC_EGREP_CPP([version= *(6[2-9]|[7-9][0-9])],
        [#include <jpeglib.h>
         version=JPEG_LIB_VERSION
],
        [AC_DEFINE(HAVE_JPEG)],
        [AC_MSG_WARN([libjpeg found, but not version 6b or later])
        HAVE_JPEG=no])
  fi
fi

### Use -lpng if available, unless `--with-png=no'.
HAVE_PNG=no
if test "${HAVE_X11}" = "yes"; then
  if test "${with_png}" != "no"; then
    # Debian unstable as of July 2003 has multiple libpngs, and puts png.h
    # in /usr/include/libpng.
    AC_CHECK_HEADERS(png.h libpng/png.h)
    if test "$ac_cv_header_png_h" = yes || test "$ac_cv_header_libpng_png_h" = yes ; then
      AC_CHECK_LIB(png, png_get_channels, HAVE_PNG=yes, , -lz -lm)
    fi
  fi

  if test "${HAVE_PNG}" = "yes"; then
    AC_DEFINE(HAVE_PNG, 1, [Define to 1 if you have the png library (-lpng).])
  fi
fi

### Use -ltiff if available, unless `--with-tiff=no'.
HAVE_TIFF=no
if test "${HAVE_X11}" = "yes"; then
  if test "${with_tiff}" != "no"; then
    AC_CHECK_HEADER(tiffio.h,
      [tifflibs="-lz -lm"
      # At least one tiff package requires the jpeg library.
      if test "${HAVE_JPEG}" = yes; then tifflibs="-ljpeg $tifflibs"; fi
      AC_CHECK_LIB(tiff, TIFFGetVersion, HAVE_TIFF=yes, , $tifflibs)])
  fi

  if test "${HAVE_TIFF}" = "yes"; then
    AC_DEFINE(HAVE_TIFF, 1, [Define to 1 if you have the tiff library (-ltiff).])
  fi
fi

### Use -lgif or -lungif if available, unless `--with-gif=no'.
HAVE_GIF=no
if test "${HAVE_X11}" = "yes" && test "${with_gif}" != "no"; then
  AC_CHECK_HEADER(gif_lib.h,
# EGifPutExtensionLast only exists from version libungif-4.1.0b1.
# Earlier versions can crash Emacs.
    [AC_CHECK_LIB(gif, EGifPutExtensionLast, HAVE_GIF=yes, try_libungif=yes)])

  if test "$HAVE_GIF" = yes; then
      ac_gif_lib_name="-lgif"
  fi

# If gif_lib.h but no libgif, try libungif.
  if test x"$try_libungif" = xyes; then
    AC_CHECK_LIB(ungif, EGifPutExtensionLast, HAVE_GIF=yes)

    if test "$HAVE_GIF" = yes; then
      AC_DEFINE(LIBGIF, -lungif, [Compiler option to link with the gif library (if not -lgif).])
      ac_gif_lib_name="-lungif"
    fi
  fi

  if test "${HAVE_GIF}" = "yes"; then
    AC_DEFINE(HAVE_GIF, 1, [Define to 1 if you have a gif library (default -lgif; otherwise specify with LIBGIF).])
  fi
fi

dnl Check for required libraries.
if test "${HAVE_X11}" = "yes"; then
  MISSING=""
  WITH_NO=""
  test "${with_xpm}" != "no" && test "${HAVE_XPM}" != "yes" &&
    MISSING="libXpm" && WITH_NO="--with-xpm=no"
  test "${with_jpeg}" != "no" && test "${HAVE_JPEG}" != "yes" &&
    MISSING="$MISSING libjpeg" && WITH_NO="$WITH_NO --with-jpeg=no"
  test "${with_png}" != "no" && test "${HAVE_PNG}" != "yes" &&
    MISSING="$MISSING libpng" && WITH_NO="$WITH_NO --with-png=no"
  test "${with_gif}" != "no" && test "${HAVE_GIF}" != "yes" &&
    MISSING="$MISSING libgif/libungif" && WITH_NO="$WITH_NO --with-gif=no"
  test "${with_tiff}" != "no" && test "${HAVE_TIFF}" != "yes" &&
    MISSING="$MISSING libtiff" && WITH_NO="$WITH_NO --with-tiff=no"

  if test "X${MISSING}" != X; then
    AC_MSG_ERROR([The following required libraries were not found:
    $MISSING
Maybe some development libraries/packages are missing?
If you don't want to link with them give
    $WITH_NO
as options to configure])
  fi
fi

### Use -lgpm if available, unless `--with-gpm=no'.
HAVE_GPM=no
if test "${with_gpm}" != "no"; then
  AC_CHECK_HEADER(gpm.h,
    [AC_CHECK_LIB(gpm, Gpm_Open, HAVE_GPM=yes)])
fi

if test "${HAVE_GPM}" = "yes"; then
  AC_DEFINE(HAVE_GPM, 1, [Define to 1 if you have the gpm library (-lgpm).])
fi

dnl Check for malloc/malloc.h on darwin
AC_CHECK_HEADER(malloc/malloc.h, [AC_DEFINE(HAVE_MALLOC_MALLOC_H, 1, [Define to 1 if you have the <malloc/malloc.h> header file.])])

### Use NeXTstep API to implement GUI.
if test "${HAVE_NS}" = "yes"; then
  AC_DEFINE(HAVE_NS, 1, [Define to 1 if you are using the NeXTstep API, either GNUstep or Cocoa on Mac OS X.])
  if test "${NS_IMPL_COCOA}" = "yes"; then
    AC_DEFINE(NS_IMPL_COCOA, 1, [Define to 1 if you are using NS windowing under MacOS X.])
    GNU_OBJC_CFLAGS=
  fi
  if test "${NS_IMPL_GNUSTEP}" = "yes"; then
    AC_DEFINE(NS_IMPL_GNUSTEP, 1, [Define to 1 if you are using NS windowing under GNUstep.])
    GNU_OBJC_CFLAGS="-fgnu-runtime -Wno-import -fconstant-string-class=NSConstantString -DGNUSTEP_BASE_LIBRARY=1 -DGNU_GUI_LIBRARY=1 -DGNU_RUNTIME=1 -DGSWARN -DGSDIAGNOSE"
  fi
  if test "${NS_HAVE_NSINTEGER}" = "yes"; then
    AC_DEFINE(NS_HAVE_NSINTEGER, 1, [Define to 1 if `NSInteger' is defined.])
  fi
  # We also have mouse menus.
  HAVE_MENUS=yes
  OTHER_FILES=ns-app
fi


### Use session management (-lSM -lICE) if available
HAVE_X_SM=no
if test "${HAVE_X11}" = "yes"; then
  AC_CHECK_HEADER(X11/SM/SMlib.h,
    [AC_CHECK_LIB(SM, SmcOpenConnection, HAVE_X_SM=yes, , -lICE)])

  if test "${HAVE_X_SM}" = "yes"; then
    AC_DEFINE(HAVE_X_SM, 1, [Define to 1 if you have the SM library (-lSM).])
    case "$LIBS" in
      *-lSM*) ;;
      *)      LIBS="-lSM -lICE $LIBS" ;;
    esac
  fi
fi

# If netdb.h doesn't declare h_errno, we must declare it by hand.
AC_CACHE_CHECK(whether netdb declares h_errno,
               emacs_cv_netdb_declares_h_errno,
[AC_TRY_LINK([#include <netdb.h>],
  [return h_errno;],
  emacs_cv_netdb_declares_h_errno=yes, emacs_cv_netdb_declares_h_errno=no)])
if test $emacs_cv_netdb_declares_h_errno = yes; then
  AC_DEFINE(HAVE_H_ERRNO, 1, [Define to 1 if netdb.h declares h_errno.])
fi

AC_FUNC_ALLOCA

dnl src/alloca.c has been removed.  Could also check if $ALLOCA is set?
dnl FIXME is there an autoconf test that does the right thing, without
dnl needing to call A_M_E afterwards?
if test x"$ac_cv_func_alloca_works" != xyes; then
   AC_MSG_ERROR( [a system implementation of alloca is required] )
fi

# fmod, logb, and frexp are found in -lm on most systems.
# On HPUX 9.01, -lm does not contain logb, so check for sqrt.
AC_CHECK_LIB(m, sqrt)

# Check for mail-locking functions in a "mail" library.  Probably this should
# have the same check as for liblockfile below.
AC_CHECK_LIB(mail, maillock)
dnl Debian, at least:
AC_CHECK_LIB(lockfile, maillock)
# If we have the shared liblockfile, assume we must use it for mail
# locking (e.g. Debian).  If we couldn't link against liblockfile
# (no liblockfile.a installed), ensure that we don't need to.
if test "$ac_cv_lib_lockfile_maillock" = no; then
  dnl This works for files generally, not just executables.
  dnl Should we look elsewhere for it?  Maybe examine /etc/ld.so.conf?
  AC_CHECK_PROG(liblockfile, liblockfile.so, yes, no,
                /usr/lib:/lib:/usr/local/lib:$LD_LIBRARY_PATH)
  if test $ac_cv_prog_liblockfile = yes; then
    AC_MSG_ERROR([Shared liblockfile found but can't link against it.
This probably means that movemail could lose mail.
There may be a `development' package to install containing liblockfile.])
  else :
  fi
fi
AC_CHECK_FUNCS(touchlock)
AC_CHECK_HEADERS(maillock.h)

AC_CHECK_FUNCS(gethostname getdomainname dup2 \
rename closedir mkdir rmdir sysinfo getrusage get_current_dir_name \
random lrand48 bcopy bcmp logb frexp fmod rint cbrt ftime setsid \
strerror fpathconf select mktime euidaccess getpagesize tzset setlocale \
utimes getrlimit setrlimit setpgid getcwd getwd shutdown getaddrinfo \
__fpending mblen mbrlen mbsinit strsignal setitimer ualarm index rindex \
sendto recvfrom getsockopt setsockopt getsockname getpeername \
gai_strerror mkstemp getline getdelim mremap memmove fsync sync bzero \
memset memcmp difftime memcpy mempcpy mblen mbrlen posix_memalign \
cfmakeraw cfsetspeed)

AC_CHECK_HEADERS(sys/un.h)

AC_FUNC_MKTIME
if test "$ac_cv_func_working_mktime" = no; then
  AC_DEFINE(BROKEN_MKTIME, 1, [Define to 1 if the mktime function is broken.])
fi

AC_FUNC_GETLOADAVG

AC_FUNC_FSEEKO

# Configure getopt.
m4_include([m4/getopt.m4])
gl_GETOPT_IFELSE([
  gl_GETOPT_SUBSTITUTE_HEADER
  gl_PREREQ_GETOPT
  GETOPTOBJS='getopt.o getopt1.o'
])
AC_SUBST(GETOPTOBJS)

AC_FUNC_GETPGRP

AC_FUNC_STRFTIME

# UNIX98 PTYs.
AC_CHECK_FUNCS(grantpt)

# PTY-related GNU extensions.
AC_CHECK_FUNCS(getpt)

# Check this now, so that we will NOT find the above functions in ncurses.
# That is because we have not set up to link ncurses in lib-src.
# It's better to believe a function is not available
# than to expect to find it in ncurses.
AC_CHECK_LIB(ncurses, tparm)

# Do we have res_init, for detecting changes in /etc/resolv.conf?

resolv=no
AC_TRY_LINK([#include <netinet/in.h>
#include <arpa/nameser.h>
#include <resolv.h>],
    [return res_init();],
    have_res_init=yes, have_res_init=no)
if test "$have_res_init" = no; then
  OLIBS="$LIBS"
  LIBS="$LIBS -lresolv"
  AC_MSG_CHECKING(for res_init with -lresolv)
  AC_TRY_LINK([#include <netinet/in.h>
#include <arpa/nameser.h>
#include <resolv.h>],
    [return res_init();],
    have_res_init=yes, have_res_init=no)
  AC_MSG_RESULT($have_res_init)
  if test "$have_res_init" = yes ; then
    resolv=yes
  fi
  LIBS="$OLIBS"
fi

if test "$have_res_init" = yes; then
  AC_DEFINE(HAVE_RES_INIT, 1, [Define to 1 if res_init is available.])
fi

# Do we need the Hesiod library to provide the support routines?
if test "$with_hesiod" != no ; then
  # Don't set $LIBS here -- see comments above.
  AC_CHECK_FUNC(res_send, , [AC_CHECK_FUNC(__res_send, ,
     [AC_CHECK_LIB(resolv, res_send, resolv=yes,
                  [AC_CHECK_LIB(resolv, __res_send, resolv=yes)])])])
  if test "$resolv" = yes ; then
    RESOLVLIB=-lresolv
  else
    RESOLVLIB=
  fi
  AC_CHECK_FUNC(hes_getmailhost, , [AC_CHECK_LIB(hesiod, hes_getmailhost,
        [AC_DEFINE(HAVE_LIBHESIOD, 1,
                  [Define to 1 if you have the hesiod library (-lhesiod).])],
        :, $RESOLVLIB)])
fi

# Do we need libresolv (due to res_init or Hesiod)?
if test "$resolv" = yes ; then
  AC_DEFINE(HAVE_LIBRESOLV, 1,
            [Define to 1 if you have the resolv library (-lresolv).])
fi

# These tell us which Kerberos-related libraries to use.
if test "${with_kerberos}" != no; then
  AC_CHECK_LIB(com_err, com_err)
  AC_CHECK_LIB(k5crypto, mit_des_cbc_encrypt)
  AC_CHECK_LIB(crypto, mit_des_cbc_encrypt)
  AC_CHECK_LIB(krb5, krb5_init_context)
  if test "${with_kerberos5}" = no; then
    AC_CHECK_LIB(des425, des_cbc_encrypt,,
                 [AC_CHECK_LIB(des, des_cbc_encrypt)])
    AC_CHECK_LIB(krb4, krb_get_cred,,
                 [AC_CHECK_LIB(krb, krb_get_cred)])
  fi

  if test "${with_kerberos5}" != no; then
    AC_CHECK_HEADERS(krb5.h,
      [AC_CHECK_MEMBERS([krb5_error.text, krb5_error.e_text],,,
                        [#include <krb5.h>])])
  else
    AC_CHECK_HEADERS(des.h,,
                     [AC_CHECK_HEADERS(kerberosIV/des.h,,
                                       [AC_CHECK_HEADERS(kerberos/des.h)])])
    AC_CHECK_HEADERS(krb.h,,
                     [AC_CHECK_HEADERS(kerberosIV/krb.h,,
                                       [AC_CHECK_HEADERS(kerberos/krb.h)])])
  fi
  AC_CHECK_HEADERS(com_err.h)
fi

# Solaris requires -lintl if you want strerror (which calls dgettext)
# to return localized messages.
AC_CHECK_LIB(intl, dgettext)

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

if test "x$HAVE_TIMEVAL" = xyes; then
  AC_CHECK_FUNCS(gettimeofday)
  if test $ac_cv_func_gettimeofday = yes; then
    AC_CACHE_CHECK(whether gettimeofday can accept two arguments,
                   emacs_cv_gettimeofday_two_arguments,
    [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],
      [struct timeval time;
       gettimeofday (&time, 0);],
      emacs_cv_gettimeofday_two_arguments=yes,
      emacs_cv_gettimeofday_two_arguments=no)])
    if test $emacs_cv_gettimeofday_two_arguments = no; then
      AC_DEFINE(GETTIMEOFDAY_ONE_ARGUMENT, 1,
                [Define to 1 if gettimeofday accepts only one argument.])
    fi
  fi
fi

ok_so_far=yes
AC_CHECK_FUNC(socket, , ok_so_far=no)
if test $ok_so_far = yes; then
  AC_CHECK_HEADER(netinet/in.h, , ok_so_far=no)
fi
if test $ok_so_far = yes; then
  AC_CHECK_HEADER(arpa/inet.h, , ok_so_far=no)
fi
if test $ok_so_far = yes; then
dnl Fixme: Not used.  Should this be HAVE_SOCKETS?
  AC_DEFINE(HAVE_INET_SOCKETS, 1,
            [Define to 1 if you have inet sockets.])
fi

AC_CHECK_HEADERS(sys/ioctl.h)

if test -f /usr/lpp/X11/bin/smt.exp; then
  AC_DEFINE(HAVE_AIX_SMT_EXP, 1,
            [Define to 1 if the file /usr/lpp/X11/bin/smt.exp exists.])
fi

AC_MSG_CHECKING(whether system supports dynamic ptys)
if test -d /dev/pts && ls -d /dev/ptmx > /dev/null 2>&1 ; then
  AC_MSG_RESULT(yes)
  AC_DEFINE(HAVE_DEV_PTMX, 1, [Define to 1 if dynamic ptys are supported.])
else
  AC_MSG_RESULT(no)
fi

AC_FUNC_FORK

dnl Adapted from Haible's version.
AC_CACHE_CHECK([for nl_langinfo and CODESET], emacs_cv_langinfo_codeset,
  [AC_TRY_LINK([#include <langinfo.h>],
    [char* cs = nl_langinfo(CODESET);],
    emacs_cv_langinfo_codeset=yes,
    emacs_cv_langinfo_codeset=no)
  ])
if test $emacs_cv_langinfo_codeset = yes; then
  AC_DEFINE(HAVE_LANGINFO_CODESET, 1,
    [Define if you have <langinfo.h> and nl_langinfo(CODESET).])
fi

AC_CHECK_TYPES(size_t)

AC_TYPE_MBSTATE_T

dnl Restrict could probably be used effectively other than in regex.c.
AC_CACHE_CHECK([for C restrict keyword], emacs_cv_c_restrict,
  [AC_TRY_COMPILE([void fred (int *restrict x);], [],
                  emacs_cv_c_restrict=yes,
                  [AC_TRY_COMPILE([void fred (int *__restrict x);], [],
                                  emacs_cv_c_restrict=__restrict,
                                  emacs_cv_c_restrict=no)])])
case "$emacs_cv_c_restrict" in
  yes) emacs_restrict=restrict;;
  no) emacs_restrict="";;
  *) emacs_restrict="$emacs_cv_c_restrict";;
esac
if test "$emacs_restrict" != __restrict; then
  AC_DEFINE_UNQUOTED(__restrict, $emacs_restrict,
    [Define to compiler's equivalent of C99 restrict keyword.
     Don't define if equivalent is `__restrict'.])
fi

AC_CACHE_CHECK([for C restricted array declarations], emacs_cv_c_restrict_arr,
  [AC_TRY_COMPILE([void fred (int x[__restrict]);], [],
                  emacs_cv_c_restrict_arr=yes, emacs_cv_c_restrict_arr=no)])
if test "$emacs_cv_c_restrict_arr" = yes; then
  AC_DEFINE(__restrict_arr, __restrict,
    [Define to compiler's equivalent of C99 restrict keyword in array
     declarations.  Define as empty for no equivalent.])
fi

dnl Fixme: AC_SYS_POSIX_TERMIOS should probably be used, but it's not clear
dnl how the tty code is related to POSIX and/or other versions of termios.
dnl The following looks like a useful start.
dnl
dnl AC_SYS_POSIX_TERMIOS
dnl if test $ac_cv_sys_posix_termios = yes; then
dnl    AC_DEFINE(HAVE_TERMIOS, 1, [Define to 1 if you have POSIX-style functions
dnl                                and macros for terminal control.])
dnl    AC_DEFINE(HAVE_TCATTR, 1, [Define to 1 if you have tcgetattr and tcsetattr.])
dnl fi

dnl Fixme: Use AC_FUNC_MEMCMP since memcmp is used.  (Needs libobj replacement.)

# Set up the CFLAGS for real compilation, so we can substitute it.
CFLAGS="$REAL_CFLAGS"
CPPFLAGS="$REAL_CPPFLAGS"

#### Find out which version of Emacs this is.
[version=`grep 'defconst[        ]*emacs-version' ${srcdir}/lisp/version.el \
         | sed -e 's/^[^"]*"\([^"]*\)".*$/\1/'`]
if test x"${version}" = x; then
  AC_MSG_ERROR([can't find current emacs version in `${srcdir}/lisp/version.el'.])
fi
if test x"${version}" != x"$PACKAGE_VERSION"; then
  AC_MSG_WARN([version mismatch between `${srcdir}/configure.in' and `${srcdir}/lisp/version.el'.])
fi

### Specify what sort of things we'll be editing into Makefile and config.h.
### Use configuration here uncanonicalized to avoid exceeding size limits.
AC_SUBST(version)
AC_SUBST(configuration)
AC_SUBST(canonical)
AC_SUBST(srcdir)
AC_SUBST(prefix)
AC_SUBST(exec_prefix)
AC_SUBST(bindir)
AC_SUBST(datadir)
AC_SUBST(sharedstatedir)
AC_SUBST(libexecdir)
AC_SUBST(mandir)
AC_SUBST(infodir)
AC_SUBST(lispdir)
AC_SUBST(locallisppath)
AC_SUBST(lisppath)
AC_SUBST(x_default_search_path)
AC_SUBST(etcdir)
AC_SUBST(archlibdir)
AC_SUBST(docdir)
AC_SUBST(bitmapdir)
AC_SUBST(gamedir)
AC_SUBST(gameuser)
AC_SUBST(c_switch_system)
AC_SUBST(c_switch_machine)
AC_SUBST(LD_SWITCH_X_SITE)
AC_SUBST(LD_SWITCH_X_SITE_AUX)
AC_SUBST(C_SWITCH_X_SITE)
AC_SUBST(CFLAGS)
AC_SUBST(X_TOOLKIT_TYPE)
AC_SUBST(machfile)
AC_SUBST(opsysfile)
AC_SUBST(GETLOADAVG_LIBS)
AC_SUBST(ns_appdir)
AC_SUBST(ns_appbindir)
AC_SUBST(ns_appresdir)
AC_SUBST(ns_appsrc)
AC_SUBST(GNUSTEP_MAKEFILES)
AC_SUBST(GNUSTEP_SYSTEM_HEADERS)
AC_SUBST(GNUSTEP_SYSTEM_LIBRARIES)
AC_SUBST(GNU_OBJC_CFLAGS)
AC_SUBST(LIB_SRC_EXTRA_INSTALLABLES)
AC_SUBST(OTHER_FILES)

AC_DEFINE_UNQUOTED(EMACS_CONFIGURATION,  "${canonical}",
                   [Define to the canonical Emacs configuration name.])
AC_DEFINE_UNQUOTED(EMACS_CONFIG_OPTIONS, "${ac_configure_args}",
                   [Define to the options passed to configure.])
AC_DEFINE_UNQUOTED(config_machfile,  "${machfile}",
                   [Define to the used machine dependent file.])
AC_DEFINE_UNQUOTED(config_opsysfile, "${opsysfile}",
                   [Define to the used os dependent file.])
AC_DEFINE_UNQUOTED(LD_SWITCH_X_SITE, ${LD_SWITCH_X_SITE},
[Define LD_SWITCH_X_SITE to contain any special flags your loader
 may need to deal with X Windows.  For instance, if you've defined
 HAVE_X_WINDOWS above and your X libraries aren't in a place that
 your loader can find on its own, you might want to add "-L/..." or
 something similar.])
AC_DEFINE_UNQUOTED(LD_SWITCH_X_SITE_AUX, ${LD_SWITCH_X_SITE_AUX},
                   [Define LD_SWITCH_X_SITE_AUX with an -R option
                    in case it's needed (for Solaris, for example).])
AC_DEFINE_UNQUOTED(C_SWITCH_X_SITE,  ${C_SWITCH_X_SITE},
[Define C_SWITCH_X_SITE to contain any special flags your compiler
 may need to deal with X Windows.  For instance, if you've defined
 HAVE_X_WINDOWS above and your X include files aren't in a place
 that your compiler can find on its own, you might want to add
 "-I/..." or something similar.])
AC_DEFINE_UNQUOTED(UNEXEC_SRC,       ${UNEXEC_SRC},
                   [Define to the unexec source file name.])

if test "${HAVE_X_WINDOWS}" = "yes" ; then
  AC_DEFINE(HAVE_X_WINDOWS, 1,
            [Define to 1 if you want to use the X window system.])
fi
if test "${USE_X_TOOLKIT}" != "none" ; then
  AC_DEFINE(USE_X_TOOLKIT, 1, [Define to 1 if using an X toolkit.])
  if test "${USE_X_TOOLKIT}" = "LUCID"; then
    AC_DEFINE(USE_LUCID, 1, [Define to 1 if using the Lucid X toolkit.])
  elif test "${USE_X_TOOLKIT}" = "MOTIF"; then
    AC_DEFINE(USE_MOTIF, 1, [Define to 1 if using the Motif X toolkit.])
  fi
fi
if test "${HAVE_X11}" = "yes" ; then
  AC_DEFINE(HAVE_X11, 1,
            [Define to 1 if you want to use version 11 of X windows.
             Otherwise, Emacs expects to use version 10.])
fi
if test "${HAVE_MENUS}" = "yes" ; then
  AC_DEFINE(HAVE_MENUS, 1,
            [Define to 1 if you have mouse menus.
             (This is automatic if you use X, but the option to specify it remains.)
             It is also defined with other window systems that support xmenu.c.])
fi
if test "${GNU_MALLOC}" = "yes" ; then
  AC_DEFINE(GNU_MALLOC, 1,
            [Define to 1 if you want to use the GNU memory allocator.])
fi
if test "${REL_ALLOC}" = "yes" ; then
  AC_DEFINE(REL_ALLOC, 1,
            [Define REL_ALLOC if you want to use the relocating allocator for
             buffer space.])
fi


AH_TOP([/* GNU Emacs site configuration template file.
   Copyright (C) 1988, 1993, 1994, 1999, 2000, 2001, 2002, 2004, 2005,
     2006, 2007, 2008, 2009  Free Software Foundation, Inc.

This file is part of GNU Emacs.

GNU Emacs is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

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

You should have received a copy of the GNU General Public License
along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */


/* No code in Emacs #includes config.h twice, but some bits of code
   intended to work with other packages as well (like gmalloc.c)
   think they can include it as many times as they like.  */
#ifndef EMACS_CONFIG_H
#define EMACS_CONFIG_H
])dnl

AH_BOTTOM([
/* If we're using X11/Carbon/GNUstep, define some consequences.  */
#if defined(HAVE_X_WINDOWS) || defined(HAVE_NS)
#define HAVE_WINDOW_SYSTEM
#define HAVE_MOUSE
#endif

/* Define AMPERSAND_FULL_NAME if you use the convention
   that & in the full name stands for the login id.  */
/* Turned on June 1996 supposing nobody will mind it.  */
#define AMPERSAND_FULL_NAME

/* Define HAVE_SOUND if we have sound support.  We know it works
   and compiles only on the specified platforms.   For others,
   it probably doesn't make sense to try.  */

#if defined __FreeBSD__ || defined __NetBSD__ || defined __linux__
#ifdef HAVE_MACHINE_SOUNDCARD_H
#define HAVE_SOUND 1
#endif
#ifdef HAVE_SYS_SOUNDCARD_H
#define HAVE_SOUND 1
#endif
#ifdef HAVE_SOUNDCARD_H
#define HAVE_SOUND 1
#endif
#ifdef HAVE_ALSA
#define HAVE_SOUND 1
#endif
#endif /* __FreeBSD__ || __NetBSD__ || __linux__  */

/* If using GNU, then support inline function declarations. */
/* Don't try to switch on inline handling as detected by AC_C_INLINE
   generally, because even if non-gcc compilers accept `inline', they
   may reject `extern inline'.  */
#if defined (__GNUC__) && defined (OPTIMIZE)
#define INLINE __inline__
#else
#define INLINE
#endif

/* `subprocesses' should be defined if you want to
   have code for asynchronous subprocesses
   (as used in M-x compile and M-x shell).
   Only MSDOS does not support this (it overrides
   this in its config_opsysfile below).  */

#define subprocesses

/* Include the os and machine dependent files.  */
#include config_opsysfile
#include config_machfile

/* Set up some defines, C and LD flags for NeXTstep interface on GNUstep.
  (There is probably a better place to do this, but right now the Cocoa
   side does this in s/darwin.h and we cannot
   parallel this exactly since GNUstep is multi-OS. */
#ifdef HAVE_NS
# ifdef NS_IMPL_GNUSTEP
/* See also .m.o rule in Makefile.in */
/* FIXME: are all these flags really needed?  Document here why.  */
#  define C_SWITCH_X_SYSTEM -D_REENTRANT -fPIC -fno-strict-aliasing
/* GNUstep needs a bit more pure memory.  Of the existing knobs,
SYSTEM_PURESIZE_EXTRA seems like the least likely to cause problems.  */
#  define SYSTEM_PURESIZE_EXTRA 30000
# endif /* NS_IMPL_GNUSTEP */
#endif /* HAVE_NS */

/* SIGTYPE is the macro we actually use.  */
#ifndef SIGTYPE
#define SIGTYPE RETSIGTYPE
#endif

#ifdef emacs /* Don't do this for lib-src.  */
/* Tell regex.c to use a type compatible with Emacs.  */
#define RE_TRANSLATE_TYPE Lisp_Object
#define RE_TRANSLATE(TBL, C) CHAR_TABLE_TRANSLATE (TBL, C)
#ifdef make_number
/* If make_number is a macro, use it.  */
#define RE_TRANSLATE_P(TBL) (!EQ (TBL, make_number (0)))
#else
/* If make_number is a function, avoid it.  */
#define RE_TRANSLATE_P(TBL) (!(INTEGERP (TBL) && XINT (TBL) == 0))
#endif
#endif

/* Avoid link-time collision with system mktime if we will use our own.  */
#if ! HAVE_MKTIME || BROKEN_MKTIME
#define mktime emacs_mktime
#endif

#define my_strftime nstrftime   /* for strftime.c */

/* The rest of the code currently tests the CPP symbol BSTRING.
   Override any claims made by the system-description files.
   Note that on some SCO version it is possible to have bcopy and not bcmp.  */
#undef BSTRING
#if defined (HAVE_BCOPY) && defined (HAVE_BCMP)
#define BSTRING
#endif

/* Some of the files of Emacs which are intended for use with other
   programs assume that if you have a config.h file, you must declare
   the type of getenv.

   This declaration shouldn't appear when alloca.s or Makefile.in
   includes config.h.  */
#ifndef NOT_C_CODE
extern char *getenv ();
#endif

/* These default definitions are good for almost all machines.
   The exceptions override them in m/MACHINE.h.  */

#ifndef BITS_PER_CHAR
#define BITS_PER_CHAR 8
#endif

#ifndef BITS_PER_SHORT
#define BITS_PER_SHORT 16
#endif

/* Note that lisp.h uses this in a preprocessor conditional, so it
   would not work to use sizeof.  That being so, we do all of them
   without sizeof, for uniformity's sake.  */
#ifndef BITS_PER_INT
#define BITS_PER_INT 32
#endif

#ifndef BITS_PER_LONG
#ifdef _LP64
#define BITS_PER_LONG 64
#else
#define BITS_PER_LONG 32
#endif
#endif

/* Define if the compiler supports function prototypes.  It may do so
   but not define __STDC__ (e.g. DEC C by default) or may define it as
   zero.  */
#undef PROTOTYPES
/* For mktime.c:  */
#ifndef __P
# if defined PROTOTYPES
#  define __P(args) args
# else
#  define __P(args) ()
# endif  /* GCC.  */
#endif /* __P */

/* Don't include "string.h" or <stdlib.h> in non-C code.  */
#ifndef NOT_C_CODE
#ifdef HAVE_STRING_H
#include "string.h"
#endif
#ifdef HAVE_STRINGS_H
#include "strings.h"  /* May be needed for bcopy & al. */
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifndef __GNUC__
# ifdef HAVE_ALLOCA_H
#  include <alloca.h>
# else /* AIX files deal with #pragma.  */
#  ifndef alloca /* predefined by HP cc +Olibcalls */
char *alloca ();
#  endif
# endif /* HAVE_ALLOCA_H */
#endif /* __GNUC__ */
#ifndef HAVE_SIZE_T
typedef unsigned size_t;
#endif
#endif /* NOT_C_CODE */

/* Define HAVE_X_I18N if we have usable i18n support.  */

#ifdef HAVE_X11R6
#define HAVE_X_I18N
#elif !defined X11R5_INHIBIT_I18N
#define HAVE_X_I18N
#endif

/* Define HAVE_X11R6_XIM if we have usable X11R6-style XIM support.  */

#if defined HAVE_X11R6 && !defined INHIBIT_X11R6_XIM
#define HAVE_X11R6_XIM
#endif

#if defined __GNUC__ && (__GNUC__ > 2 \
                         || (__GNUC__ == 2 && __GNUC_MINOR__ >= 5))
#define NO_RETURN       __attribute__ ((__noreturn__))
#else
#define NO_RETURN       /* nothing */
#endif

/* These won't be used automatically yet.  We also need to know, at least,
   that the stack is continuous.  */
#ifdef __GNUC__
#  ifndef GC_SETJMP_WORKS
  /* GC_SETJMP_WORKS is nearly always appropriate for GCC --
     see NON_SAVING_SETJMP in the target descriptions.  */
  /* Exceptions (see NON_SAVING_SETJMP in target description) are
     SCO5 non-ELF (but Emacs specifies ELF) and SVR3 on x86.
     Fixme: Deal with SVR3.  */
#    define GC_SETJMP_WORKS 1
#  endif
#  ifndef GC_LISP_OBJECT_ALIGNMENT
#    define GC_LISP_OBJECT_ALIGNMENT (__alignof__ (Lisp_Object))
#  endif
#endif

#ifndef HAVE_BCOPY
#define bcopy(a,b,s) memcpy (b,a,s)
#endif
#ifndef HAVE_BZERO
#define bzero(a,s) memset (a,0,s)
#endif
#ifndef HAVE_BCMP
#define BCMP memcmp
#endif

#endif /* EMACS_CONFIG_H */

/*
Local Variables:
mode: c
End:
*/
])dnl

#### Report on what we decided to do.
#### Report GTK as a toolkit, even if it doesn't use Xt.
#### It makes printing result more understandable as using GTK sets
#### toolkit_scroll_bars to yes by default.
if test "${HAVE_GTK}" = "yes"; then
  USE_X_TOOLKIT=GTK
fi

echo "
Configured for \`${canonical}'.

  Where should the build process find the source code?    ${srcdir}
  What operating system and machine description files should Emacs use?
        \`${opsysfile}' and \`${machfile}'
  What compiler should emacs be built with?               ${CC} ${CFLAGS}
  Should Emacs use the GNU version of malloc?             ${GNU_MALLOC}${GNU_MALLOC_reason}
  Should Emacs use a relocating allocator for buffers?    ${REL_ALLOC}
  Should Emacs use mmap(2) for buffer allocation?         $use_mmap_for_buffers
  What window system should Emacs use?                    ${window_system}
  What toolkit should Emacs use?                          ${USE_X_TOOLKIT}"

if test -n "${x_includes}"; then
echo "  Where do we find X Windows header files?                ${x_includes}"
else
echo "  Where do we find X Windows header files?                Standard dirs"
fi
if test -n "${x_libraries}"; then
echo "  Where do we find X Windows libraries?                   ${x_libraries}"
else
echo "  Where do we find X Windows libraries?                   Standard dirs"
fi

echo "  Does Emacs use -lXaw3d?                                 ${HAVE_XAW3D}"
echo "  Does Emacs use -lXpm?                                   ${HAVE_XPM}"
echo "  Does Emacs use -ljpeg?                                  ${HAVE_JPEG}"
echo "  Does Emacs use -ltiff?                                  ${HAVE_TIFF}"
echo "  Does Emacs use a gif library?                           ${HAVE_GIF} $ac_gif_lib_name"
echo "  Does Emacs use -lpng?                                   ${HAVE_PNG}"
echo "  Does Emacs use -lrsvg-2?                                ${HAVE_RSVG}"
echo "  Does Emacs use -lgpm?                                   ${HAVE_GPM}"
echo "  Does Emacs use -ldbus?                                  ${HAVE_DBUS}"

echo "  Does Emacs use -lfreetype?                              ${HAVE_FREETYPE}"
echo "  Does Emacs use -lm17n-flt?                              ${HAVE_M17N_FLT}"
echo "  Does Emacs use -lotf?                                   ${HAVE_LIBOTF}"
echo "  Does Emacs use -lxft?                                   ${HAVE_XFT}"

echo "  Does Emacs use toolkit scroll bars?                     ${USE_TOOLKIT_SCROLL_BARS}"
echo

if test $USE_XASSERTS = yes; then
   echo "  Compiling with asserts turned on."
   CPPFLAGS="$CPPFLAGS -DXASSERTS=1"
fi

echo

if test "$USE_X_TOOLKIT" = GTK; then
  case "$canonical" in
  *cygwin*)
    echo "There are known problems with Emacs and Gtk+ on cygwin, so you
  will probably get a crash on startup.  If this happens, please use another
  toolkit for Emacs.  See etc/PROBLEMS for more information."
  ;;
  esac
fi

if test "$HAVE_NS" = "yes"; then
   echo
   echo "You must run \"make install\" in order to test the built application.
The installed application will go to nextstep/Emacs.app and can be
run or moved from there."
   if test "$EN_NS_SELF_CONTAINED" = "yes"; then
      echo "The application will be fully self-contained."
    else
      echo "The lisp resources for the application will be installed under ${prefix}.
You may need to run \"make install\" with sudo.  The application will fail
to run if these resources are not installed."
   fi
   echo
fi

if test "$HAVE_DBUS" = yes && test "${opsys}" != "gnu-linux"; then
  echo "D-Bus integration has been tested for GNU/Linux only."
  echo
fi


# Remove any trailing slashes in these variables.
[test "${prefix}" != NONE &&
  prefix=`echo "${prefix}" | sed 's,\([^/]\)/*$,\1,'`
test "${exec_prefix}" != NONE &&
  exec_prefix=`echo "${exec_prefix}" | sed 's,\([^/]\)/*$,\1,'`]

# Now get this: Some word that is part of the ${srcdir} directory name
# or the ${configuration} value might, just might, happen to be an
# identifier like `sun4' or `i386' or something, and be predefined by
# the C preprocessor to some helpful value like 1, or maybe the empty
# string.  Needless to say consequent macro substitutions are less
# than conducive to the makefile finding the correct directory.
[cpp_undefs="`echo $srcdir $configuration $canonical |
  sed -e 's/[^a-zA-Z0-9_]/ /g' -e 's/^/ /' -e 's/  *$//' \
  -e 's/  */ -U/g' -e 's/-U[0-9][^ ]*//g'`"]

## Check if the C preprocessor will convert `..' to `. .'.  If so, set
## CPP_NEED_TRADITIONAL to `yes' so that the code to generate Makefile
## from Makefile.c can correctly provide the arg `-traditional' to the
## C preprocessor.

AC_EGREP_CPP(yes..yes,
        [yes..yes],
        CPP_NEED_TRADITIONAL=no,
        CPP_NEED_TRADITIONAL=yes)

AC_OUTPUT(Makefile lib-src/Makefile.c:lib-src/Makefile.in oldXMenu/Makefile \
        doc/emacs/Makefile doc/misc/Makefile doc/lispintro/Makefile \
        doc/lispref/Makefile src/Makefile.c:src/Makefile.in \
        lwlib/Makefile lisp/Makefile leim/Makefile, [

### Make the necessary directories, if they don't exist.
for dir in etc lisp ; do
  test -d ${dir} || mkdir ${dir}
done

# Build src/Makefile from ${srcdir}/src/Makefile.c
# and lib-src/Makefile from ${srcdir}/lib-src/Makefile.c
# This must be done after src/config.h is built, since we rely on that file.

echo creating src/epaths.h
${MAKE-make} epaths-force

# As of 2000-11-19, newest development versions of GNU cpp preprocess
# `..' to `. .'  unless invoked with -traditional

if test "x$GCC" = xyes && test "x$CPP_NEED_TRADITIONAL" = xyes; then
  CPPFLAGS="$CPPFLAGS -traditional"
fi

echo creating lib-src/Makefile
( cd lib-src
  rm -f junk.c junk1.c junk2.c
  sed -e '/start of cpp stuff/q' \
      < Makefile.c > junk1.c
  sed -e '1,/start of cpp stuff/d'\
      -e 's,/\*\*/#\(.*\)$,/* \1 */,' \
      < Makefile.c > junk.c
  $CPP $cpp_undefs -I. -I$srcdir/src $CPPFLAGS junk.c | \
      sed -e 's/^ /     /' -e '/^#/d' -e '/^[   \f]*$/d' > junk2.c
  cat junk1.c junk2.c > Makefile.new
  rm -f junk.c junk1.c junk2.c
  chmod 444 Makefile.new
  mv -f Makefile.new Makefile
)

echo creating src/Makefile
( cd src
  rm -f junk.c junk1.c junk2.c
  sed -e '/start of cpp stuff/q' \
      < Makefile.c > junk1.c
  sed -e '1,/start of cpp stuff/d'\
      -e 's,/\*\*/#\(.*\)$,/* \1 */,' \
      < Makefile.c > junk.c
  $CPP $cpp_undefs -I. -I$srcdir/src $CPPFLAGS junk.c | \
      sed -e 's/^ /     /' -e '/^#/d' -e '/^[   \f]*$/d' > junk2.c
  cat junk1.c junk2.c > Makefile.new
  rm -f junk.c junk1.c junk2.c
  chmod 444 Makefile.new
  mv -f Makefile.new Makefile
)

if test ! -f src/.gdbinit && test -f $srcdir/src/.gdbinit; then
  echo creating src/.gdbinit
  echo source $srcdir/src/.gdbinit > src/.gdbinit
fi

], [GCC="$GCC" NON_GNU_CPP="$NON_GNU_CPP" CPP="$CPP" CPP_NEED_TRADITIONAL="$CPP_NEED_TRADITIONAL" CPPFLAGS="$CPPFLAGS" cpp_undefs="$cpp_undefs"])

m4_if(dnl       Do not change this comment
   arch-tag: 156a4dd5-bddc-4d18-96ac-f37742cf6a5e
)dnl