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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 If you changed any AC_DEFINES, also run autoheader.
dnl
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dnl Copyright (C) 1994-1996, 1999-2011  Free Software Foundation, Inc.
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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(2.65)
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AC_INIT(emacs, 24.0.90)
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AC_CONFIG_HEADER(src/config.h:src/config.in)
AC_CONFIG_SRCDIR(src/lisp.h)
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AC_CONFIG_AUX_DIR(build-aux)
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AM_INIT_AUTOMAKE
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dnl Support for --program-prefix, --program-suffix and
dnl --program-transform-name options
AC_ARG_PROGRAM

dnl It is important that variables on the RHS not be expanded here,
dnl hence the single quotes.  This is per the GNU coding standards, see
dnl (autoconf) Installation Directory Variables
dnl See also epaths.h below.
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'

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])
dnl FIXME hesiod support may not be present, so it seems like an error
dnl to define, or at least use, this unconditionally.
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_OFF([mmdf],[support MMDF mailboxes])
if test "$with_mmdf" != no; then
   AC_DEFINE(MAIL_USE_MMDF, 1, [Define to support MMDF mailboxes in movemail.])
fi

OPTION_DEFAULT_OFF([mail-unlink],[unlink, rather than empty, mail spool after reading])
if test "$with_mail_unlink" != no; then
   AC_DEFINE(MAIL_UNLINK_SPOOL, 1, [Define to unlink, rather than empty, mail spool after reading.])
fi

AC_ARG_WITH([mailhost],[AS_HELP_STRING([--with-mailhost=HOSTNAME],
    [string giving default POP mail host])],
    AC_DEFINE_UNQUOTED(MAILHOST, ["$withval"], [String giving fallback POP mail host.]))

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 or gtk, gtk3, lucid or athena, motif, no)])],
[	  case "${withval}" in
	    y | ye | yes )	val=gtk ;;
	    n | no )		val=no  ;;
	    l | lu | luc | luci | lucid )	val=lucid ;;
	    a | at | ath | athe | athen | athena )	val=athena ;;
	    m | mo | mot | moti | motif )	val=motif ;;
	    g | gt | gtk  )	val=gtk ;;
	    gtk3  )	val=gtk3 ;;
	    * )
AC_MSG_ERROR([`--with-x-toolkit=$withval' is invalid;
this option's value should be `yes', `no', `lucid', `athena', `motif', `gtk' or
`gtk3'.  `yes' and `gtk' are synonyms. `athena' and `lucid' are synonyms.])
	    ;;
	  esac
	  with_x_toolkit=$val
])

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OPTION_DEFAULT_OFF([wide-int], [prefer wide Emacs integers (typically 62-bit)])
if test "$with_wide_int" = yes; then
  AC_DEFINE([WIDE_EMACS_INT], 1, [Use long long for EMACS_INT if available.])
fi

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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([xml2],[don't compile with XML parsing support])
OPTION_DEFAULT_ON([imagemagick],[don't compile with ImageMagick 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])
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OPTION_DEFAULT_OFF([ns],[use NeXTstep (Cocoa or GNUstep) windowing system])
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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])
OPTION_DEFAULT_ON([gconf],[don't compile with GConf support])
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OPTION_DEFAULT_ON([gsettings],[don't compile with GSettings support])
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OPTION_DEFAULT_ON([selinux],[don't compile with SELinux support])
OPTION_DEFAULT_ON([gnutls],[don't use -lgnutls for SSL/TLS 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])

## This is an option because I do not know if all info/man support
## compressed files, nor how to test if they do so.
OPTION_DEFAULT_ON([compress-info],[don't compress the installed Info pages])
if test $with_compress_info = yes; then
   GZIP_INFO=yes
else
   GZIP_INFO=
fi
AC_SUBST(GZIP_INFO)

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

CRT_DIR=
AC_ARG_WITH([crt-dir],dnl
[AS_HELP_STRING([--with-crt-dir=DIR],[directory containing crtn.o etc.
The default is /usr/lib, or /usr/lib64 on some platforms.])])
CRT_DIR="${with_crt_dir}"

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AC_ARG_WITH(gameuser,dnl
[AS_HELP_STRING([--with-gameuser=USER],[user for shared game score files])])
test "X${with_gameuser}" != X && test "${with_gameuser}" != yes \
  && gameuser="${with_gameuser}"
test "X$gameuser" = X && gameuser=games

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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,
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[AS_HELP_STRING([--disable-maintainer-mode],
                [disable make rules and dependencies not useful (and sometimes
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		 confusing) to the casual installer])],
      USE_MAINTAINER_MODE=$enableval,
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      USE_MAINTAINER_MODE=yes)
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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
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if test x$ac_gc_check_string_overrun != x ; then
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  AC_DEFINE(GC_CHECK_STRING_OVERRUN, 1,
[Define this to check for short string overrun.])
fi
if test x$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(use-lisp-union-type,
[AS_HELP_STRING([--enable-use-lisp-union-type],
                [use a union for the Lisp_Object data type.
		This is only useful for development for catching certain types of bugs.])],
if test "${enableval}" != "no"; then
   AC_DEFINE(USE_LISP_UNION_TYPE, 1,
   [Define this to use a lisp union for the Lisp_Object data type.])
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"
else
   PROFILING_CFLAGS=
fi
AC_SUBST(PROFILING_CFLAGS)

AC_ARG_ENABLE(autodepend,
[AS_HELP_STRING([--enable-autodepend],
		[automatically generate dependencies to .h-files.
 		 Requires GNU Make and Gcc. Enabled if GNU Make and Gcc is
 		 found])],
[ac_enable_autodepend="${enableval}"],[ac_enable_autodepend=yes])

#### 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

#### 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/*.h
### 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.

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

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  ## GNU/Linux and similar ports
  *-*-linux* )
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    opsys=gnu-linux
    case ${canonical} in
      alpha*)	machine=alpha ;;
      s390-*)	machine=ibms390 ;;
      s390x-*)	machine=ibms390x ;;
      powerpc*)	machine=macppc ;;
      sparc*)	machine=sparc ;;
      ia64*)	machine=ia64 ;;
      m68k*)	machine=m68k ;;
      x86_64*)	machine=amdx86-64 ;;
    esac
  ;;

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

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

  ## NetBSD ports
  *-*-netbsd* )
    opsys=netbsd
    case "${canonical}" in
      alpha*)      machine=alpha ;;
      x86_64-*)    machine=amdx86-64 ;;
      i[3456]86-*) machine=intel386 ;;
      m68k-*)      machine=m68k ;;
      powerpc-*)   machine=macppc ;;
      sparc*-)     machine=sparc ;;
      vax-*)       machine=vax ;;
    esac
  ;;

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

  ## Apple Darwin / Mac OS X
  *-apple-darwin* )
    case "${canonical}" in
      i[3456]86-* )  machine=intel386 ;;
      powerpc-* )    machine=macppc ;;
      x86_64-* )     machine=amdx86-64 ;;
      * )            unported=yes ;;
    esac
    opsys=darwin
    # Define CPP as follows to make autoconf work correctly.
    CPP="${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* )
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    opsys=hpux10-20
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  ;;
  hppa*-hp-hpux1[1-9]* )
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    opsys=hpux11
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    CFLAGS="-D_INCLUDE__STDC_A1_SOURCE $CFLAGS"
  ;;

  ## IBM machines
  rs6000-ibm-aix4.[23]* )
    machine=ibmrs6000 opsys=aix4-2
  ;;
  powerpc-ibm-aix4.[23]*  )
    machine=ibmrs6000 opsys=aix4-2
  ;;
  rs6000-ibm-aix[56]* )
    machine=ibmrs6000 opsys=aix4-2
  ;;
  powerpc-ibm-aix[56]*  )
    machine=ibmrs6000 opsys=aix4-2
  ;;

  ## Silicon Graphics machines
  ## Iris 4D
  mips-sgi-irix6.5 )
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    opsys=irix6-5
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    # 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
  *-sun-solaris* \
    | i[3456]86-*-solaris2* | i[3456]86-*-sunos5* \
    | x86_64-*-solaris2*    | x86_64-*-sunos5*)
    case "${canonical}" in
      i[3456]86-*-* )     machine=intel386 ;;
      amd64-*-*|x86_64-*-*)	machine=amdx86-64 ;;
      sparc* )		machine=sparc ;;
      * )		unported=yes ;;
    esac
    case "${canonical}" in
      *-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
  ;;

  ## 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"
 				;;
      *-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
  ;;

  * )
    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 ;;
    * )
      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

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if test -n "$machine"; then
  machfile="m/${machine}.h"
else
  machfile=
fi
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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
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AM_PROG_CC_C_O

# Initialize gnulib right after verifying that the C compiler works.
gl_EARLY
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# 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"$CPP" = x; then
  AC_MSG_CHECKING([whether we are using a Sun C compiler])
  AC_CACHE_VAL(emacs_cv_sunpro_c,
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  [AC_LINK_IFELSE([AC_LANG_PROGRAM([[]],
[[#ifndef __SUNPRO_C
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fail;
#endif
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]])], emacs_cv_sunpro_c=yes, emacs_cv_sunpro_c=no)])
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  AC_MSG_RESULT($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$GCC = xyes; then
  test "x$GCC_TEST_OPTIONS" != x && CC="$CC $GCC_TEST_OPTIONS"
else
  test "x$NON_GCC_TEST_OPTIONS" != x && CC="$CC $NON_GCC_TEST_OPTIONS"
fi

### Use -Wdeclaration-after-statement if the compiler supports it
AC_MSG_CHECKING([whether gcc understands -Wdeclaration-after-statement])
SAVE_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -Wdeclaration-after-statement"
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])], has_option=yes, has_option=no)
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if test $has_option = yes; then
   C_WARNINGS_SWITCH="-Wdeclaration-after-statement $C_WARNINGS_SWITCH"
fi
AC_MSG_RESULT($has_option)
CFLAGS="$SAVE_CFLAGS"
unset has_option
unset SAVE_CFLAGS

### Use -Wold-style-definition if the compiler supports it
# This can be removed when conversion to standard C is finished.
AC_MSG_CHECKING([whether gcc understands -Wold-style-definition])
SAVE_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -Wold-style-definition"
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])], has_option=yes, has_option=no)
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if test $has_option = yes; then
   C_WARNINGS_SWITCH="-Wold-style-definition $C_WARNINGS_SWITCH"
fi
AC_MSG_RESULT($has_option)
CFLAGS="$SAVE_CFLAGS"
unset has_option
unset SAVE_CFLAGS

### Use -Wimplicit-function-declaration if the compiler supports it
AC_MSG_CHECKING([whether gcc understands -Wimplicit-function-declaration])
SAVE_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -Wimplicit-function-declaration"
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])], has_option=yes, has_option=no)
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if test $has_option = yes; then
   C_WARNINGS_SWITCH="-Wimplicit-function-declaration $C_WARNINGS_SWITCH"
fi
AC_MSG_RESULT($has_option)
CFLAGS="$SAVE_CFLAGS"
unset has_option
unset SAVE_CFLAGS

AC_SUBST(C_WARNINGS_SWITCH)


#### Some other nice autoconf tests.

dnl checks for programs
AC_PROG_CPP
AC_PROG_INSTALL
if test "x$RANLIB" = x; then
  AC_PROG_RANLIB
fi

## Although we're running on an amd64 kernel, we're actually compiling for
## the x86 architecture.  The user should probably have provided an
## explicit --build to `configure', but if everything else than the kernel
## is running in i386 mode, we can help them out.
if test "$machine" = "amdx86-64"; then
  AC_CHECK_DECL([i386])
  if test "$ac_cv_have_decl_i386" = "yes"; then
    canonical=`echo "$canonical" | sed -e 's/^amd64/i386/' -e 's/^x86_64/i386/'`
    machine=intel386
    machfile="m/${machine}.h"
  fi
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 Bazaar checkout on the other hand, the manuals are not included.
## So makeinfo is a requirement to build from Bazaar, 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 Bazaar checkout.
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HAVE_MAKEINFO=yes

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if test "$MAKEINFO" = "no"; then
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  MAKEINFO=makeinfo
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  if test "x${with_makeinfo}" = "xno"; then
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    HAVE_MAKEINFO=no
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  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
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AC_SUBST(HAVE_MAKEINFO)
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dnl Add our options to ac_link now, after it is set up.

if test x$GCC = xyes; then
  test "x$GCC_LINK_TEST_OPTIONS" != x && \
    ac_link="$ac_link $GCC_LINK_TEST_OPTIONS"
else
  test "x$NON_GCC_LINK_TEST_OPTIONS" != x && \
    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=$LDFLAGS
if test x$GCC = xyes; then
  LDFLAGS="$LDFLAGS -Wl,-znocombreloc"
else
  LDFLAGS="$LDFLAGS -znocombreloc"
fi

AC_MSG_CHECKING([for -znocombreloc])
AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])],
  [AC_MSG_RESULT(yes)],
  LDFLAGS=$late_LDFLAGS
  [AC_MSG_RESULT(no)])


# The value of CPP is a quoted variable reference, so we need to do this
# to get its actual value...
CPP=`eval "echo $CPP"`


dnl The function dump-emacs will not be defined and temacs will do
dnl (load "loadup") automatically unless told otherwise.
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test "x$CANNOT_DUMP" = "x" && CANNOT_DUMP=no
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case "$opsys" in
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  your-opsys-here) CANNOT_DUMP=yes ;;
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esac
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test "$CANNOT_DUMP" = "yes" && \
  AC_DEFINE(CANNOT_DUMP, 1, [Define if Emacs cannot be dumped on your system.])

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AC_SUBST(CANNOT_DUMP)


UNEXEC_OBJ=unexelf.o
case "$opsys" in
  # MSDOS uses unexcoff.o
  # MSWindows uses unexw32.o
  aix4-2)
   UNEXEC_OBJ=unexaix.o
   ;;
  cygwin)
   UNEXEC_OBJ=unexcw.o
   ;;
  darwin)
   UNEXEC_OBJ=unexmacosx.o
   ;;
  hpux10-20 | hpux11)
   UNEXEC_OBJ=unexhp9k800.o
   ;;
  sol2-10)
   # Use the Solaris dldump() function, called from unexsol.c, to dump
   # emacs, instead of the generic ELF dump code found in unexelf.c.
   # The resulting binary has a complete symbol table, and is better
   # for debugging and other observability tools (debuggers, pstack, etc).
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   #
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   # If you encounter a problem using dldump(), please consider sending
   # a message to the OpenSolaris tools-linking mailing list:
   #      http://mail.opensolaris.org/mailman/listinfo/tools-linking
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   #
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   # It is likely that dldump() works with older Solaris too, but this has
   # not been tested, so for now this change is for Solaris 10 or newer.
   UNEXEC_OBJ=unexsol.o
   ;;
esac

LD_SWITCH_SYSTEM=
case "$opsys" in
  freebsd)
   ## Let `ld' find image libs and similar things in /usr/local/lib.
   ## The system compiler, GCC, has apparently been modified to not
   ## look there, contrary to what a stock GCC would do.
   LD_SWITCH_SYSTEM=-L/usr/local/lib
   ;;

  gnu-linux)
   ## cpp test was "ifdef __mips__", but presumably this is equivalent...
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   case $host_cpu in mips*) LD_SWITCH_SYSTEM="-G 0";; esac
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   ;;

  netbsd)
   LD_SWITCH_SYSTEM="-Wl,-rpath,/usr/pkg/lib -L/usr/pkg/lib -Wl,-rpath,/usr/local/lib -L/usr/local/lib"
   ;;

  openbsd)
   ## Han Boetes <han@mijncomputer.nl> says this is necessary,
   ## otherwise Emacs dumps core on elf systems.
   LD_SWITCH_SYSTEM="-Z"
   ;;
esac
AC_SUBST(LD_SWITCH_SYSTEM)

ac_link="$ac_link $LD_SWITCH_SYSTEM"

## This setting of LD_SWITCH_SYSTEM references LD_SWITCH_X_SITE_AUX,
## which has not been defined yet.  When this was handled with cpp,
## it was expanded to null when configure sourced the s/*.h file.
## Thus LD_SWITCH_SYSTEM had different values in configure and the Makefiles.
## FIXME it would be cleaner to put this in LD_SWITCH_SYSTEM_TEMACS
## (or somesuch), but because it is supposed to go at the _front_
## of LD_SWITCH_SYSTEM, we cannot do that in exactly the same way.
## Compare with the gnu-linux case below, which added to the end
## of LD_SWITCH_SYSTEM, and so can instead go at the front of
## LD_SWITCH_SYSTEM_TEMACS.
case "$opsys" in
  netbsd|openbsd)
   ## _AUX_RPATH is like _AUX, but uses -rpath instead of -R.
   LD_SWITCH_SYSTEM="\$(LD_SWITCH_X_SITE_AUX_RPATH) $LD_SWITCH_SYSTEM" ;;
esac


C_SWITCH_MACHINE=
if test "$machine" = "alpha"; then
  AC_CHECK_DECL([__ELF__])
  if test "$ac_cv_have_decl___ELF__" = "yes"; then
    ## With ELF, make sure that all common symbols get allocated to in the
    ## data section.  Otherwise, the dump of temacs may miss variables in
    ## the shared library that have been initialized.  For example, with
    ## GNU libc, __malloc_initialized would normally be resolved to the
    ## shared library's .bss section, which is fatal.
    if test "x$GCC" = "xyes"; then
      C_SWITCH_MACHINE="-fno-common"
    else
      AC_MSG_ERROR([What gives?  Fix me if DEC Unix supports ELF now.])
    fi
  else
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    UNEXEC_OBJ=unexalpha.o
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  fi
fi
AC_SUBST(C_SWITCH_MACHINE)

AC_SUBST(UNEXEC_OBJ)

C_SWITCH_SYSTEM=
## Some programs in src produce warnings saying certain subprograms
## are too complex and need a MAXMEM value greater than 2000 for
## additional optimization.  --nils@exp-math.uni-essen.de
test "$opsys" = "aix4.2" && test "x$GCC" != "xyes" && \
  C_SWITCH_SYSTEM="-ma -qmaxmem=4000"
## gnu-linux might need -D_BSD_SOURCE on old libc5 systems.
## It is redundant in glibc2, since we define _GNU_SOURCE.
AC_SUBST(C_SWITCH_SYSTEM)


LIBS_SYSTEM=
case "$opsys" in
  ## IBM's X11R5 uses -lIM and -liconv in AIX 3.2.2.
  aix4-2) LIBS_SYSTEM="-lrts -lIM -liconv" ;;

  freebsd) LIBS_SYSTEM="-lutil" ;;

  hpux*) LIBS_SYSTEM="-l:libdld.sl" ;;

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  sol2*) LIBS_SYSTEM="-lsocket -lnsl" ;;
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  ## Motif needs -lgen.
  unixware) LIBS_SYSTEM="-lsocket -lnsl -lelf -lgen" ;;
esac
AC_SUBST(LIBS_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

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# Suppress obsolescent Autoconf test for size_t; Emacs assumes C89 or better.
AC_DEFUN([AC_TYPE_SIZE_T])
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# Likewise for obsolescent test for uid_t, gid_t; Emacs assumes them.
AC_DEFUN([AC_TYPE_UID_T])
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dnl Do this early because it can frob feature test macros for Unix-98 &c.
AC_SYS_LARGEFILE


LIB_MATH=-lm
LIB_STANDARD=
START_FILES=

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case $opsys in
  cygwin )
    LIB_MATH=
    START_FILES='pre-crt0.o'
    ;;
  darwin )
    ## Adding -lm confuses the dynamic linker, so omit it.
    LIB_MATH=
    START_FILES='pre-crt0.o'
    ;;
  freebsd )
    LIB_STANDARD='-lgcc -lc -lgcc $(CRT_DIR)/crtend.o $(CRT_DIR)/crtn.o'
    START_FILES='pre-crt0.o $(CRT_DIR)/crt1.o $(CRT_DIR)/crti.o $(CRT_DIR)/crtbegin.o'
    ;;
  gnu-linux | gnu-kfreebsd )
    LIB_STANDARD='-lgcc -lc -lgcc $(CRT_DIR)/crtn.o'
    START_FILES='pre-crt0.o $(CRT_DIR)/crt1.o $(CRT_DIR)/crti.o'
    ;;
  hpux10-20 | hpux11 )
    LIB_STANDARD=-lc
    START_FILES='pre-crt0.o $(CRT_DIR)/crt0.o'
    ;;
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  dnl NB this may be adjusted below.
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  netbsd | openbsd )
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    LIB_STANDARD='-lgcc -lc -lgcc $(CRT_DIR)/crtend.o'
    START_FILES='pre-crt0.o $(CRT_DIR)/crt0.o $(CRT_DIR)/crtbegin.o'
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    ;;
esac

AC_SUBST(LIB_MATH)
AC_SUBST(START_FILES)

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dnl Not all platforms use crtn.o files.  Check if the current one does.
crt_files=

for file in x $LIB_STANDARD $START_FILES; do
  case "$file" in
    *CRT_DIR*) crt_files="$crt_files `echo $file | sed -e 's|.*/||'`" ;;
  esac
done

if test "x$crt_files" != x; then

  ## If user specified a crt-dir, use that unconditionally.
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  crt_gcc=no

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  if test "X$CRT_DIR" = "X"; then

    CRT_DIR=/usr/lib            # default

    case "$canonical" in
      x86_64-*-linux-gnu* | s390x-*-linux-gnu*)
      ## On x86-64 and s390x GNU/Linux distributions, the standard library
      ## can be in a variety of places.  We only try /usr/lib64 and /usr/lib.
      ## For anything else (eg /usr/lib32), it is up the user to specify
      ## the location (bug#5655).
      ## Test for crtn.o, not just the directory, because sometimes the
      ## directory exists but does not have the relevant files (bug#1287).
      ## FIXME better to test for binary compatibility somehow.
      test -e /usr/lib64/crtn.o && CRT_DIR=/usr/lib64
      ;;

      powerpc64-*-linux-gnu* | sparc64-*-linux-gnu*) CRT_DIR=/usr/lib64 ;;
    esac

    case "$opsys" in
      hpux10-20) CRT_DIR=/lib ;;
    esac

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    test "x${GCC}" = xyes && crt_gcc=yes

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  fi                            # CRT_DIR = ""

  crt_missing=

  for file in $crt_files; do

    ## If we're using gcc, try to determine it automatically by asking
    ## gcc.  [If this doesn't work, CRT_DIR will remain at the
    ## system-dependent default from above.]
    if test $crt_gcc = yes && test ! -e $CRT_DIR/$file; then

       crt_file=`$CC --print-file-name=$file 2>/dev/null`
       case "$crt_file" in
         */*)
           CRT_DIR=`AS_DIRNAME(["$crt_file"])`
           ;;
       esac
    fi

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    dnl We expect all the files to be in a single directory, so after the
    dnl first there is no point asking gcc.
    crt_gcc=no

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    test -e $CRT_DIR/$file || crt_missing="$crt_missing $file"
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  done                          # $crt_files

  test "x$crt_missing" = x || \
    AC_MSG_ERROR([Required file(s) not found:$crt_missing
Try using the --with-crt-dir option.])

fi                              # crt_files != ""

AC_SUBST(CRT_DIR)

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case $opsys in
  netbsd | openbsd )
    if test -f $CRT_DIR/crti.o; then

        test -f $CRT_DIR/crtn.o || \
          AC_MSG_ERROR([Required file not found: crtn.o])

        LIB_STANDARD='-lgcc -lc -lgcc $(CRT_DIR)/crtend.o $(CRT_DIR)/crtn.o'
        START_FILES='pre-crt0.o $(CRT_DIR)/crt0.o $(CRT_DIR)/crti.o $(CRT_DIR)/crtbegin.o'
    fi
    ;;
esac

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dnl This function definition 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.
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  AC_CHECK_HEADERS(machine/soundcard.h sys/soundcard.h soundcard.h,
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    have_sound_header=yes)
  # 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 $LDFLAGS"
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    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <asoundlib.h>]], [[snd_lib_error_set_handler (0);]])],
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                    emacs_alsa_normal=yes,
	            emacs_alsa_normal=no)
    if test "$emacs_alsa_normal" != yes; then
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      AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <alsa/asoundlib.h>]],
                     [[snd_lib_error_set_handler (0);]])],
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                     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

  dnl Define HAVE_SOUND if we have sound support.  We know it works and
  dnl compiles only on the specified platforms.  For others, it
  dnl probably doesn't make sense to try.
  if test x$have_sound_header = xyes || test $HAVE_ALSA = yes; then
     case "$opsys" in
       dnl defined __FreeBSD__ || defined __NetBSD__ || defined __linux__
       gnu-linux|freebsd|netbsd)
         AC_DEFINE(HAVE_SOUND, 1, [Define to 1 if you have sound support.])
         ;;
     esac
  fi

  AC_SUBST(CFLAGS_SOUND)
fi

dnl checks for header files
AC_CHECK_HEADERS(sys/select.h sys/time.h unistd.h utime.h \
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  linux/version.h sys/systeminfo.h \
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  stdio_ext.h fcntl.h coff.h pty.h sys/mman.h \
  sys/vlimit.h sys/resource.h locale.h sys/_mbstate_t.h \
  sys/utsname.h pwd.h utmp.h dirent.h util.h)

AC_MSG_CHECKING(if personality LINUX32 can be set)
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/personality.h>]], [[personality (PER_LINUX32)]])],
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               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_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,
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#ifdef TIME_WITH_SYS_TIME
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#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>
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#endif]], [[static struct utimbuf x; x.actime = x.modtime;]])],
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  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 Check for speed_t typedef.
AC_CACHE_CHECK(for speed_t, emacs_cv_speed_t,
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  [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <termios.h>]], [[speed_t x = 1;]])],
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    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,
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#ifdef TIME_WITH_SYS_TIME
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#include <sys/time.h>
#include <time.h>
#else
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#else
#include <time.h>
#endif
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#endif]], [[static struct timeval x; x.tv_sec = x.tv_usec;]])],
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  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,
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <math.h>]],
[[static struct exception x; x.arg1 = x.arg2 = x.retval; x.name = ""; x.type = 1;]])],
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  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

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AC_CHECK_HEADERS(sys/socket.h)
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AC_CHECK_HEADERS(net/if.h, , , [AC_INCLUDES_DEFAULT
#if HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif])
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AC_CHECK_HEADERS(ifaddrs.h, , , [AC_INCLUDES_DEFAULT
#if HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif])
AC_CHECK_HEADERS(net/if_dl.h, , , [AC_INCLUDES_DEFAULT
#if HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif])
AC_CHECK_FUNCS(getifaddrs freeifaddrs)
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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,
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		  struct ifreq.ifr_addr,
		  struct ifreq.ifr_addr.sa_len], , ,
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		 [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
AC_CACHE_CHECK([for void * support], emacs_cv_void_star,
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  [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [[void * foo;]])],
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                   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 Check for endianess
AC_C_BIGENDIAN

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AC_CACHE_CHECK([for  __attribute__ ((__aligned__ (expr)))],
  [emacs_cv_attribute_aligned],
  [AC_COMPILE_IFELSE(
     [AC_LANG_PROGRAM(
	[[char __attribute__ ((__aligned__ (1 << 3))) c;]],
	[[]])],
     [emacs_cv_attribute_aligned=yes],
     [emacs_cv_attribute_aligned=no])])
if test $emacs_cv_attribute_aligned = yes; then
  AC_DEFINE([HAVE_ATTRIBUTE_ALIGNED], 1,
    [Define to 1 if GCC-style __attribute__ ((__aligned__ (expr))) works.])
fi

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dnl check for Make feature
AC_PROG_MAKE_SET

DEPFLAGS=
MKDEPDIR=":"
deps_frag=deps.mk
dnl check for GNU Make if we have GCC and autodepend is on.
if test "$GCC" = yes && test "$ac_enable_autodepend" = yes; then
   AC_MSG_CHECKING([whether we are using GNU Make])
   HAVE_GNU_MAKE=no
   testval=`make --version 2>/dev/null | grep 'GNU Make'`
   if test "x$testval" != x; then
      HAVE_GNU_MAKE=yes
   else
      ac_enable_autodepend=no
   fi
   AC_MSG_RESULT([$HAVE_GNU_MAKE])
   if test $HAVE_GNU_MAKE = yes; then
      AC_MSG_CHECKING([whether gcc understands -MMD -MF])
      SAVE_CFLAGS="$CFLAGS"
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      CFLAGS="$CFLAGS -MMD -MF deps.d -MP"
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      AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])], , ac_enable_autodepend=no)
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      CFLAGS="$SAVE_CFLAGS"
      test -f deps.d || ac_enable_autodepend=no
      rm -rf deps.d
      AC_MSG_RESULT([$ac_enable_autodepend])
   fi
   if test $ac_enable_autodepend = yes; then
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      DEPFLAGS='-MMD -MF ${DEPDIR}/$*.d -MP'
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      ## In parallel builds, another make might create depdir between
      ## the first test and mkdir, so stick another test on the end.
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      ## Or use install-sh -d?  mkdir -p is not portable.
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      MKDEPDIR='test -d ${DEPDIR} || mkdir ${DEPDIR} || test -d ${DEPDIR}'
      deps_frag=autodeps.mk
   fi
fi
deps_frag=$srcdir/src/$deps_frag
AC_SUBST(MKDEPDIR)
AC_SUBST(DEPFLAGS)
AC_SUBST_FILE(deps_frag)


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lisp_frag=$srcdir/src/lisp.mk
AC_SUBST_FILE(lisp_frag)


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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.
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

LD_SWITCH_X_SITE_AUX=
LD_SWITCH_X_SITE_AUX_RPATH=
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"`
    LD_SWITCH_X_SITE_AUX_RPATH=`echo ${LD_SWITCH_X_SITE_AUX} | sed -e 's/-R/-Wl,-rpath,/'`
  fi
  x_default_search_path=""
  x_search_path=${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
AC_SUBST(LD_SWITCH_X_SITE_AUX)
AC_SUBST(LD_SWITCH_X_SITE_AUX_RPATH)

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"
TEMACS_LDFLAGS2="\${LDFLAGS}"
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GNU_OBJC_CFLAGS=
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dnl I don't think it's especially important, but src/Makefile.in
dnl (now the only user of ns_appdir) used to go to the trouble of adding a
dnl trailing "/" to it, so now we do it here.
if test "${with_ns}" != no; then
  if test "${opsys}" = darwin; then
     NS_IMPL_COCOA=yes
     ns_appdir=`pwd`/nextstep/Emacs.app
     ns_appbindir=${ns_appdir}/Contents/MacOS/
     ns_appresdir=${ns_appdir}/Contents/Resources
     ns_appsrc=${srcdir}/nextstep/Cocoa/Emacs.base
  elif test -f $GNUSTEP_CONFIG_FILE; then
     NS_IMPL_GNUSTEP=yes
     ns_appdir=`pwd`/nextstep/Emacs.app
     ns_appbindir=${ns_appdir}/
     ns_appresdir=${ns_appdir}/Resources
     ns_appsrc=${srcdir}/nextstep/GNUstep/Emacs.base
     dnl FIXME sourcing this several times in subshells seems inefficient.
     GNUSTEP_SYSTEM_HEADERS="$(. $GNUSTEP_CONFIG_FILE; echo $GNUSTEP_SYSTEM_HEADERS)"
     GNUSTEP_SYSTEM_LIBRARIES="$(. $GNUSTEP_CONFIG_FILE; echo $GNUSTEP_SYSTEM_LIBRARIES)"
     dnl I seemed to need these as well with GNUstep-startup 0.25.
     GNUSTEP_LOCAL_HEADERS="$(. $GNUSTEP_CONFIG_FILE; echo $GNUSTEP_LOCAL_HEADERS)"
     GNUSTEP_LOCAL_LIBRARIES="$(. $GNUSTEP_CONFIG_FILE; echo $GNUSTEP_LOCAL_LIBRARIES)"
     test "x${GNUSTEP_LOCAL_HEADERS}" != "x" && \
       GNUSTEP_LOCAL_HEADERS="-I${GNUSTEP_LOCAL_HEADERS}"
     test "x${GNUSTEP_LOCAL_LIBRARIES}" != "x" && \
       GNUSTEP_LOCAL_LIBRARIES="-L${GNUSTEP_LOCAL_LIBRARIES}"
     CPPFLAGS="$CPPFLAGS -I${GNUSTEP_SYSTEM_HEADERS} ${GNUSTEP_LOCAL_HEADERS}"
     CFLAGS="$CFLAGS -I${GNUSTEP_SYSTEM_HEADERS} ${GNUSTEP_LOCAL_HEADERS}"
     LDFLAGS="$LDFLAGS -L${GNUSTEP_SYSTEM_LIBRARIES} ${GNUSTEP_LOCAL_LIBRARIES}"
     LIB_STANDARD=
     START_FILES=
     TEMACS_LDFLAGS2=
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     dnl GNUstep defines BASE_NATIVE_OBJC_EXCEPTIONS to 0 or 1.
     dnl If they had chosen to either define it or not, we could have
     dnl just used AC_CHECK_DECL here.
     AC_CACHE_CHECK(if GNUstep defines BASE_NATIVE_OBJC_EXCEPTIONS,
       emacs_cv_objc_exceptions,
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <GNUstepBase/GSConfig.h>]],
[[#if defined BASE_NATIVE_OBJC_EXCEPTIONS && BASE_NATIVE_OBJC_EXCEPTIONS > 0
1;
#else
fail;
#endif]])], emacs_cv_objc_exceptions=yes, emacs_cv_objc_exceptions=no ) )
     if test $emacs_cv_objc_exceptions = yes; then
       dnl _NATIVE_OBJC_EXCEPTIONS is used by the GNUstep headers.
       AC_DEFINE(_NATIVE_OBJC_EXCEPTIONS, 1,
         [Define if GNUstep uses ObjC exceptions.])
       GNU_OBJC_CFLAGS="-fobjc-exceptions"
     fi
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  fi
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  dnl This is only used while we test the NS headers, it gets reset below.
  CFLAGS="$CFLAGS $GNU_OBJC_CFLAGS"

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  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
AC_SUBST(TEMACS_LDFLAGS2)

ns_frag=/dev/null
NS_OBJ=
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NS_OBJC_OBJ=
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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=${ns_appresdir}
  fi
  ns_frag=$srcdir/src/ns.mk
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  NS_OBJ="fontset.o fringe.o image.o"
  NS_OBJC_OBJ="nsterm.o nsfns.o nsmenu.o nsselect.o nsimage.o nsfont.o"
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fi
CFLAGS="$tmp_CFLAGS"
CPPFLAGS="$tmp_CPPFLAGS"
AC_SUBST(NS_OBJ)
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AC_SUBST(NS_OBJC_OBJ)
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AC_SUBST(LIB_STANDARD)
AC_SUBST_FILE(ns_frag)

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 ;;
      gtk3 ) with_gtk3=yes
             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,
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[AC_LINK_IFELSE([AC_LANG_PROGRAM([[extern void (* __after_morecore_hook)();]],[[__after_morecore_hook = 0]])],
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  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


dnl See comments in aix4-2.h about maybe using system malloc there.
system_malloc=no
case "$opsys" in
  ## darwin ld insists on the use of malloc routines in the System framework.
  darwin|sol2-10) system_malloc=yes ;;
esac

if test "${system_malloc}" = "yes"; then
  AC_DEFINE(SYSTEM_MALLOC, 1, [Define to use system malloc.])
  GNU_MALLOC=no
  GNU_MALLOC_reason="
    (The GNU allocators don't work with this system configuration.)"
  GMALLOC_OBJ=
  VMLIMIT_OBJ=
else
  test "$doug_lea_malloc" != "yes" && GMALLOC_OBJ=gmalloc.o
  VMLIMIT_OBJ=vm-limit.o
fi
AC_SUBST(GMALLOC_OBJ)
AC_SUBST(VMLIMIT_OBJ)

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.])

  ## Use mmap directly for allocating larger buffers.
  ## FIXME this comes from src/s/{gnu,gnu-linux}.h:
  ## #ifdef DOUG_LEA_MALLOC; #undef REL_ALLOC; #endif
  ## Does the AC_FUNC_MMAP test below make this check unecessary?
  case "$opsys" in
    gnu*) REL_ALLOC=no ;;
  esac
fi

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

use_mmap_for_buffers=no
case "$opsys" in
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  cygwin|freebsd|irix6-5) use_mmap_for_buffers=yes ;;
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esac

AC_FUNC_MMAP
if test $use_mmap_for_buffers = yes; then
  AC_DEFINE(USE_MMAP_FOR_BUFFERS, 1, [Define to use mmap to allocate buffer text.])
  REL_ALLOC=no
fi

LIBS="$LIBS_SYSTEM $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")

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dnl Check if pthreads is available.
LIB_PTHREAD=
AC_CHECK_HEADERS(pthread.h)
if test "$ac_cv_header_pthread_h"; then
  AC_CHECK_LIB(pthread, pthread_self, HAVE_PTHREAD=yes)
fi
if test "$HAVE_PTHREAD" = yes; then
  case "${canonical}" in
    *-hpux*) ;;
    *) LIB_PTHREAD="-lpthread" ;;
  esac
  AC_DEFINE(HAVE_PTHREAD, 1, [Define to 1 if you have pthread (-lpthread).])
fi
AC_SUBST([LIB_PTHREAD])

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AC_CHECK_LIB(pthreads, cma_open)

## Note: when using cpp in s/aix4.2.h, this definition depended on
## HAVE_LIBPTHREADS.  That was not defined earlier in configure when
## the system file was sourced.  Hence the value of LIBS_SYSTEM
## added to LIBS in configure would never contain the pthreads part,
## but the value used in Makefiles might.  FIXME?
##
## -lpthreads seems to be necessary for Xlib in X11R6, and should
## be harmless on older versions of X where it happens to exist.
test "$opsys" = "aix4-2" && \
  test $ac_cv_lib_pthreads_cma_open = yes && \
  LIBS_SYSTEM="$LIBS_SYSTEM -lpthreads"

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
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    AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[int i;]])], [], [gdb_cv_bigtoc=])
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  ])
  ;;
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_CFLAGS="$CFLAGS"
REAL_CPPFLAGS="$CPPFLAGS"

if test "${HAVE_X11}" = "yes"; then
  DEFS="$C_SWITCH_X_SITE $DEFS"
  LDFLAGS="$LDFLAGS $LD_SWITCH_X_SITE"
  LIBS="-lX11 $LIBS"
  CFLAGS="$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 "${opsys}" = "gnu-linux"; then
    AC_MSG_CHECKING(whether X on GNU/Linux needs -b to link)
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    AC_LINK_IFELSE([AC_LANG_PROGRAM([[]],
     [[XOpenDisplay ("foo");]])],
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     [xlinux_first_failure=no],
     [xlinux_first_failure=yes])
    if test "${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"
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      AC_LINK_IFELSE([AC_LANG_PROGRAM([[]],
       [[XOpenDisplay ("foo");]])],
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       [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)
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  AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <X11/Xlib.h>
#include <X11/XKBlib.h>]],
	[[XkbDescPtr kb = XkbGetKeyboard (0, XkbAllComponentsMask, XkbUseCoreKbd);]])],
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	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,
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  [AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <X11/Xlib.h>]],
[[#if XlibSpecificationRelease < 6
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fail;
#endif
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]])], emacs_cv_x11_version_6=yes, emacs_cv_x11_version_6=no)])
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  if test $emacs_cv_x11_version_6 = yes; then
    AC_MSG_RESULT(6 or newer)
    AC_DEFINE(HAVE_X11R6, 1,
	      [Define to 1 if you have the X11R6 or newer version of Xlib.])
    AC_DEFINE(HAVE_X_I18N, 1, [Define if you have usable i18n support.])
    ## inoue@ainet.or.jp says Solaris has a bug related to X11R6-style
    ## XIM support.
    case "$opsys" in
      sol2-*) : ;;
      *) AC_DEFINE(HAVE_X11R6_XIM, 1,
           [Define if you have usable X11R6-style XIM support.])
         ;;
    esac
  else
    AC_MSG_RESULT(before 6)
  fi
fi


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

    PKG_CHECK_MODULES(RSVG, $RSVG_MODULE, HAVE_RSVG=yes, :)
    AC_SUBST(RSVG_CFLAGS)
    AC_SUBST(RSVG_LIBS)

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

HAVE_IMAGEMAGICK=no
if test "${HAVE_X11}" = "yes"; then
  if test "${with_imagemagick}" != "no"; then
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Glenn Morris committed
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    ## 6.2.8 is the earliest version known to work, but earlier versions
    ## might work - let us know if you find one.
    ## 6.0.7 does not work.  See bug#7955.
    IMAGEMAGICK_MODULE="Wand >= 6.2.8"
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    PKG_CHECK_MODULES(IMAGEMAGICK, $IMAGEMAGICK_MODULE, HAVE_IMAGEMAGICK=yes, :)
    AC_SUBST(IMAGEMAGICK_CFLAGS)
    AC_SUBST(IMAGEMAGICK_LIBS)
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Paul Eggert committed
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    if test $HAVE_IMAGEMAGICK = yes; then
      AC_DEFINE(HAVE_IMAGEMAGICK, 1, [Define to 1 if using imagemagick.])
      CFLAGS="$CFLAGS $IMAGEMAGICK_CFLAGS"
      LIBS="$IMAGEMAGICK_LIBS $LIBS"
      AC_CHECK_FUNCS(MagickExportImagePixels)
    fi
  fi
fi


HAVE_GTK=no
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GTK_OBJ=
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if test "${with_gtk3}" = "yes"; then
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  GLIB_REQUIRED=2.28
  GTK_REQUIRED=3.0
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  GTK_MODULES="gtk+-3.0 >= $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
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  AC_DEFINE(HAVE_GTK3, 1, [Define to 1 if using GTK 3 or later.])
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  GTK_OBJ=emacsgtkfixed.o
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