code.delx.au - gnu-emacs/blob - configure.ac

   1 dnl  Autoconf script for GNU Emacs
   2 dnl To rebuild the 'configure' script from this, execute the command
   3 dnl     autoconf
   4 dnl in the directory containing this script.
   5 dnl If you changed any AC_DEFINES, also run autoheader.
   6 dnl
   7 dnl Copyright (C) 1994-1996, 1999-2016 Free Software Foundation, Inc.
   8 dnl
   9 dnl  This file is part of GNU Emacs.
  10 dnl
  11 dnl  GNU Emacs is free software: you can redistribute it and/or modify
  12 dnl  it under the terms of the GNU General Public License as published by
  13 dnl  the Free Software Foundation, either version 3 of the License, or
  14 dnl  (at your option) any later version.
  15 dnl
  16 dnl  GNU Emacs is distributed in the hope that it will be useful,
  17 dnl  but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 dnl  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 dnl  GNU General Public License for more details.
  20 dnl
  21 dnl  You should have received a copy of the GNU General Public License
  22 dnl  along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  23
  24 AC_PREREQ(2.65)
  25 dnl Note this is parsed by (at least) make-dist and lisp/cedet/ede/emacs.el.
  26 AC_INIT(GNU Emacs, 25.1.50, bug-gnu-emacs@gnu.org)
  27
  28 dnl Set emacs_config_options to the options of 'configure', quoted for the shell,
  29 dnl and then quoted again for a C string.  Separate options with spaces.
  30 dnl Add some environment variables, if they were passed via the environment
  31 dnl rather than on the command-line.
  32 emacs_config_options=
  33 optsep=
  34 dnl This is the documented way to record the args passed to configure,
  35 dnl rather than $ac_configure_args.
  36 for opt in "$@" CFLAGS CPPFLAGS LDFLAGS; do
  37   case $opt in
  38     -n | --no-create | --no-recursion)
  39       continue ;;
  40     CFLAGS | CPPFLAGS | LDFLAGS)
  41       eval 'test "${'$opt'+set}" = set' || continue
  42       case " $*" in
  43         *" $opt="*) continue ;;
  44       esac
  45       eval opt=$opt=\$$opt ;;
  46   esac
  47
  48   emacs_shell_specials=$IFS\''"#$&()*;<>?@<:@\\`{|~'
  49   case $opt in
  50     *[["$emacs_shell_specials"]]*)
  51       case $opt in
  52         *\'*)
  53           emacs_quote_apostrophes="s/'/'\\\\''/g"
  54           opt=`AS_ECHO(["$opt"]) | sed "$emacs_quote_apostrophes"` ;;
  55       esac
  56       opt="'$opt'"
  57       case $opt in
  58         *[['"\\']]*)
  59           emacs_quote_for_c='s/[["\\]]/\\&/g; $!s/$/\\n\\/'
  60           opt=`AS_ECHO(["$opt"]) | sed "$emacs_quote_for_c"` ;;
  61       esac ;;
  62   esac
  63   AS_VAR_APPEND([emacs_config_options], ["$optsep$opt"])
  64   optsep=' '
  65 done
  66
  67 AC_CONFIG_HEADERS(src/config.h:src/config.in)
  68 AC_CONFIG_SRCDIR(src/lisp.h)
  69 AC_CONFIG_AUX_DIR(build-aux)
  70 dnl automake 1.13 and later understand this, making -I m4 unnecessary.
  71 dnl With older versions this is a no-op.
  72 AC_CONFIG_MACRO_DIR(m4)
  73
  74 xcsdkdir=
  75 AC_CHECK_PROGS(XCRUN, [xcrun])
  76 if test -n "$XCRUN"; then
  77   if test -z "$MAKE"; then
  78     dnl Call the variable MAKE_PROG, not MAKE, to avoid confusion with
  79     dnl the usual MAKE variable that 'make' itself uses.
  80     AC_CHECK_PROG([MAKE_PROG], [make], [yes])
  81     if test -z "$MAKE_PROG"; then
  82       MAKE="$XCRUN MAKE"
  83       export MAKE
  84       xcsdkdir=`$XCRUN --show-sdk-path 2>/dev/null`
  85     fi
  86   fi
  87 fi
  88
  89 dnl GNU Make is required, so don't test for its individual features.
  90 am_cv_make_support_nested_variables=yes
  91 AC_DEFUN([AC_PROG_MAKE_SET],
  92   [SET_MAKE=
  93    AC_SUBST([SET_MAKE])])
  94
  95 dnl Check for GNU Make and possibly set MAKE before running AM_INIT_AUTOMAKE.
  96 [emacs_check_gnu_make ()
  97 {
  98   emacs_makeout=`($1 --version) 2>/dev/null` &&
  99   case $emacs_makeout in
 100     'GNU Make '3.8[1-9]* | 'GNU Make '3.9[0-9]* | \
 101     'GNU Make '3.[1-9][0-9][0-9]* | 'GNU Make '[4-9]* | 'GNU Make '[1-9][0-9]* )
 102        ac_path_MAKE_found=:;;
 103   esac
 104 }]
 105 AC_CACHE_CHECK([for GNU Make], [ac_cv_path_MAKE],
 106   [ac_path_MAKE_found=false
 107    if test -n "$MAKE"; then
 108      emacs_check_gnu_make "$MAKE"
 109      ac_cv_path_MAKE=$MAKE
 110    else
 111      emacs_tried_make=false
 112      emacs_tried_gmake=false
 113      emacs_tried_gnumake=false
 114      AC_PATH_PROGS_FEATURE_CHECK([MAKE], [make gmake gnumake],
 115        [[emacs_check_gnu_make "$ac_path_MAKE"
 116          if $ac_path_MAKE_found; then
 117            # Use the fully-qualified program name only if the basename
 118            # would not resolve to it.
 119            if eval \$emacs_tried_$ac_prog; then
 120              ac_cv_path_MAKE=$ac_path_MAKE
 121            else
 122              ac_cv_path_MAKE=$ac_prog
 123            fi
 124          fi
 125          eval emacs_tried_$ac_prog=:]])
 126    fi])
 127 $ac_path_MAKE_found || {
 128 AC_MSG_ERROR([[Building Emacs requires GNU Make, at least version 3.81.
 129 If you have it installed under another name, configure with 'MAKE=...'.
 130 For example, run '$0 MAKE=gnu-make'.]])
 131 }
 132 MAKE=$ac_cv_path_MAKE
 133 export MAKE
 134
 135 dnl Fairly arbitrary, older versions might work too.
 136 AM_INIT_AUTOMAKE(1.11)
 137
 138 dnl Canonicalize the configuration name.
 139 AC_CANONICAL_HOST
 140
 141 case $host in
 142  *-mingw*)
 143
 144   if test -z "$host_alias"; then
 145
 146       # No --host argument was given to 'configure'; therefore $host
 147       # was set to a default value based on the build platform.  But
 148       # this default value may be wrong if we are building from a
 149       # 64-bit MSYS[2] pre-configured to build 32-bit MinGW programs.
 150       # Therefore, we'll try to get the right host platform from the
 151       # compiler's target.
 152
 153       AC_MSG_CHECKING([the compiler's target])
 154       if test -z "$CC"; then
 155           cc=gcc
 156       else
 157           cc=$CC
 158       fi
 159       cc_target=`$cc -v 2>&1 | sed -n 's/Target: //p'`
 160       case "$cc_target" in
 161           *-*) host=$cc_target
 162               ;;
 163           "") AC_MSG_ERROR([Impossible to obtain $cc compiler target.
 164 Please explicitly provide --host.])
 165               ;;
 166           *) AC_MSG_WARN([Compiler reported non-standard target.
 167 Defaulting to $host.])
 168               ;;
 169       esac
 170       AC_MSG_RESULT([$host])
 171   fi
 172
 173   . $srcdir/nt/mingw-cfg.site
 174
 175   case $srcdir in
 176     /* | ?:*)
 177       # srcdir is an absolute path.  In this case, force the format
 178       # "/c/foo/bar", to simplify later conversions to native Windows
 179       # format ("c:/foo/bar").
 180       srcdir=`cd "${srcdir}" && pwd -W`
 181       # 'eval' pacifies strict POSIX non-MinGW shells (Bug#18612).
 182       eval 'srcdir="/${srcdir:0:1}${srcdir:2}"'
 183       ;;
 184   esac;;
 185 esac
 186
 187 canonical=$host
 188 configuration=${host_alias-${build_alias-$host}}
 189
 190 dnl Support for --program-prefix, --program-suffix and
 191 dnl --program-transform-name options
 192 AC_ARG_PROGRAM
 193
 194 dnl It is important that variables on the RHS not be expanded here,
 195 dnl hence the single quotes.  This is per the GNU coding standards, see
 196 dnl (autoconf) Installation Directory Variables
 197 dnl See also epaths.h below.
 198 lispdir='${datadir}/emacs/${version}/lisp'
 199 standardlisppath='${lispdir}'
 200 locallisppath='${datadir}/emacs/${version}/site-lisp:'\
 201 '${datadir}/emacs/site-lisp'
 202 lisppath='${locallisppath}:${standardlisppath}'
 203 etcdir='${datadir}/emacs/${version}/etc'
 204 archlibdir='${libexecdir}/emacs/${version}/${configuration}'
 205 etcdocdir='${datadir}/emacs/${version}/etc'
 206 gamedir='${localstatedir}/games/emacs'
 207
 208 dnl Special option to disable the most of other options.
 209 AC_ARG_WITH(all,
 210 [AS_HELP_STRING([--without-all],
 211                 [omit almost all features and build
 212                 small executable with minimal dependencies])],
 213   [with_features=$withval],
 214   [with_features=yes])
 215
 216 dnl OPTION_DEFAULT_OFF(NAME, HELP-STRING)
 217 dnl Create a new --with option that defaults to being disabled.
 218 dnl NAME is the base name of the option.  The shell variable with_NAME
 219 dnl   will be set to either the user's value (if the option is
 220 dnl   specified; 'yes' for a plain --with-NAME) or to 'no' (if the
 221 dnl   option is not specified).  Note that the shell variable name is
 222 dnl   constructed as autoconf does, by replacing non-alphanumeric
 223 dnl   characters with "_".
 224 dnl HELP-STRING is the help text for the option.
 225 AC_DEFUN([OPTION_DEFAULT_OFF], [dnl
 226   AC_ARG_WITH([$1],[AS_HELP_STRING([--with-$1],[$2])],[],[dnl
 227     m4_bpatsubst([with_$1], [[^0-9a-z]], [_])=no])dnl
 228 ])dnl
 229
 230 dnl OPTION_DEFAULT_ON(NAME, HELP-STRING)
 231 dnl Create a new --with option that defaults to $with_features.
 232 dnl NAME is the base name of the option.  The shell variable with_NAME
 233 dnl   will be set either to 'no' (for a plain --without-NAME) or to
 234 dnl   'yes' (if the option is not specified).  Note that the shell
 235 dnl   variable name is constructed as autoconf does, by replacing
 236 dnl   non-alphanumeric characters with "_".
 237 dnl HELP-STRING is the help text for the option.
 238 AC_DEFUN([OPTION_DEFAULT_ON], [dnl
 239   AC_ARG_WITH([$1],[AS_HELP_STRING([--without-$1],[$2])],[],[dnl
 240    m4_bpatsubst([with_$1], [[^0-9a-z]], [_])=$with_features])dnl
 241 ])dnl
 242
 243 OPTION_DEFAULT_ON([pop],[don't support POP mail retrieval with movemail])
 244 if test "$with_pop" = yes; then
 245    AC_DEFINE(MAIL_USE_POP)
 246 fi
 247 AH_TEMPLATE(MAIL_USE_POP, [Define to support POP mail retrieval.])dnl
 248
 249 OPTION_DEFAULT_OFF([kerberos],[support Kerberos-authenticated POP])
 250 if test "$with_kerberos" != no; then
 251    AC_DEFINE(KERBEROS)
 252 fi
 253 AH_TEMPLATE(KERBEROS,
 254             [Define to support Kerberos-authenticated POP mail retrieval.])dnl
 255
 256 OPTION_DEFAULT_OFF([kerberos5],[support Kerberos version 5 authenticated POP])
 257 if test "${with_kerberos5}" != no; then
 258   if test "${with_kerberos}" = no; then
 259     with_kerberos=yes
 260     AC_DEFINE(KERBEROS)
 261   fi
 262   AC_DEFINE(KERBEROS5, 1, [Define to use Kerberos 5 instead of Kerberos 4.])
 263 fi
 264
 265 OPTION_DEFAULT_OFF([hesiod],[support Hesiod to get the POP server host])
 266 dnl FIXME hesiod support may not be present, so it seems like an error
 267 dnl to define, or at least use, this unconditionally.
 268 if test "$with_hesiod" != no; then
 269   AC_DEFINE(HESIOD, 1, [Define to support using a Hesiod database to find the POP server.])
 270 fi
 271
 272 OPTION_DEFAULT_OFF([mail-unlink],[unlink, rather than empty, mail spool after reading])
 273 if test "$with_mail_unlink" != no; then
 274    AC_DEFINE(MAIL_UNLINK_SPOOL, 1, [Define to unlink, rather than empty, mail spool after reading.])
 275 fi
 276
 277 AC_ARG_WITH([mailhost],[AS_HELP_STRING([--with-mailhost=HOSTNAME],
 278     [string giving default POP mail host])],
 279     AC_DEFINE_UNQUOTED(MAILHOST, ["$withval"], [String giving fallback POP mail host.]))
 280
 281 AC_ARG_WITH([sound],[AS_HELP_STRING([--with-sound=VALUE],
 282   [compile with sound support (VALUE one of: yes, alsa, oss, bsd-ossaudio, no;
 283 default yes).  Only for GNU/Linux, FreeBSD, NetBSD, MinGW, Cygwin.])],
 284   [ case "${withval}" in
 285       yes|no|alsa|oss|bsd-ossaudio) val=$withval ;;
 286       *) AC_MSG_ERROR(['--with-sound=$withval' is invalid;
 287 this option's value should be 'yes', 'no', 'alsa', 'oss', or 'bsd-ossaudio'.])
 288       ;;
 289     esac
 290     with_sound=$val
 291   ],
 292   [with_sound=$with_features])
 293
 294 dnl FIXME currently it is not the last.
 295 dnl This should be the last --with option, because --with-x is
 296 dnl added later on when we find the file name of X, and it's best to
 297 dnl keep them together visually.
 298 AC_ARG_WITH([x-toolkit],[AS_HELP_STRING([--with-x-toolkit=KIT],
 299  [use an X toolkit (KIT one of: yes or gtk, gtk2, gtk3, lucid or athena, motif, no)])],
 300 [         case "${withval}" in
 301             y | ye | yes )      val=gtk ;;
 302             n | no )            val=no  ;;
 303             l | lu | luc | luci | lucid )       val=lucid ;;
 304             a | at | ath | athe | athen | athena )      val=athena ;;
 305             m | mo | mot | moti | motif )       val=motif ;;
 306             g | gt | gtk  )     val=gtk ;;
 307             gtk2  )     val=gtk2 ;;
 308             gtk3  )     val=gtk3 ;;
 309             * )
 310 AC_MSG_ERROR(['--with-x-toolkit=$withval' is invalid;
 311 this option's value should be 'yes', 'no', 'lucid', 'athena', 'motif', 'gtk',
 312 'gtk2' or 'gtk3'.  'yes' and 'gtk' are synonyms.
 313 'athena' and 'lucid' are synonyms.])
 314             ;;
 315           esac
 316           with_x_toolkit=$val
 317 ])
 318
 319 OPTION_DEFAULT_OFF([wide-int], [prefer wide Emacs integers (typically 62-bit); allows buffer and string size up to 2GB on 32-bit hosts, at the cost of 10% to 30% slowdown of Lisp interpreter and larger memory footprint])
 320 if test "$with_wide_int" = yes; then
 321   AC_DEFINE([WIDE_EMACS_INT], 1, [Use long long for EMACS_INT if available.])
 322 fi
 323
 324 dnl _ON results in a '--without' option in the --help output, so
 325 dnl the help text should refer to "don't compile", etc.
 326 with_xpm_set=${with_xpm+set}
 327 OPTION_DEFAULT_ON([xpm],[don't compile with XPM image support])
 328 OPTION_DEFAULT_ON([jpeg],[don't compile with JPEG image support])
 329 OPTION_DEFAULT_ON([tiff],[don't compile with TIFF image support])
 330 OPTION_DEFAULT_ON([gif],[don't compile with GIF image support])
 331 OPTION_DEFAULT_ON([png],[don't compile with PNG image support])
 332 OPTION_DEFAULT_ON([rsvg],[don't compile with SVG image support])
 333 OPTION_DEFAULT_OFF([cairo],[compile with Cairo drawing (experimental)])
 334 OPTION_DEFAULT_ON([xml2],[don't compile with XML parsing support])
 335 OPTION_DEFAULT_ON([imagemagick],[don't compile with ImageMagick image support])
 336
 337 OPTION_DEFAULT_ON([xft],[don't use XFT for anti aliased fonts])
 338 OPTION_DEFAULT_ON([libotf],[don't use libotf for OpenType font support])
 339 OPTION_DEFAULT_ON([m17n-flt],[don't use m17n-flt for text shaping])
 340
 341 OPTION_DEFAULT_ON([toolkit-scroll-bars],[don't use Motif or Xaw3d scroll bars])
 342 OPTION_DEFAULT_ON([xaw3d],[don't use Xaw3d])
 343 OPTION_DEFAULT_ON([xim],[don't use X11 XIM])
 344 AC_ARG_WITH([ns],[AS_HELP_STRING([--with-ns],
 345 [use Nextstep (OS X Cocoa or GNUstep) windowing system.
 346 On by default on Mac OS X.])],[],[with_ns=maybe])
 347 OPTION_DEFAULT_OFF([w32], [use native MS Windows GUI in a Cygwin build])
 348
 349 OPTION_DEFAULT_ON([gpm],[don't use -lgpm for mouse support on a GNU/Linux console])
 350 OPTION_DEFAULT_ON([dbus],[don't compile with D-Bus support])
 351 OPTION_DEFAULT_ON([gconf],[don't compile with GConf support])
 352 OPTION_DEFAULT_ON([gsettings],[don't compile with GSettings support])
 353 OPTION_DEFAULT_ON([selinux],[don't compile with SELinux support])
 354 OPTION_DEFAULT_ON([gnutls],[don't use -lgnutls for SSL/TLS support])
 355 OPTION_DEFAULT_ON([zlib],[don't compile with zlib decompression support])
 356 OPTION_DEFAULT_OFF([modules],[compile with dynamic modules support])
 357
 358 AC_ARG_WITH([file-notification],[AS_HELP_STRING([--with-file-notification=LIB],
 359  [use a file notification library (LIB one of: yes, inotify, kqueue, gfile, w32, no)])],
 360  [ case "${withval}" in
 361     y | ye | yes )      val=yes ;;
 362     n | no )            val=no  ;;
 363     i | in | ino | inot | inoti | inotif | inotify )    val=inotify ;;
 364     k | kq | kqu | kque | kqueu | kqueue )      val=kqueue ;;
 365     g | gf | gfi | gfil | gfile )       val=gfile ;;
 366     w | w3 | w32 )      val=w32 ;;
 367     * ) AC_MSG_ERROR(['--with-file-notification=$withval' is invalid;
 368 this option's value should be 'yes', 'no', 'inotify', 'kqueue', 'gfile' or 'w32'.
 369 'yes' is a synonym for 'w32' on MS-Windows, for 'no' on Nextstep,
 370 otherwise for the first of 'inotify', 'kqueue' or 'gfile' that is usable.])
 371     ;;
 372    esac
 373    with_file_notification=$val
 374  ],
 375  [with_file_notification=$with_features])
 376
 377 OPTION_DEFAULT_OFF([xwidgets],
 378   [enable use of some gtk widgets in Emacs buffers (requires gtk3)])
 379
 380 ## For the times when you want to build Emacs but don't have
 381 ## a suitable makeinfo, and can live without the manuals.
 382 dnl http://lists.gnu.org/archive/html/emacs-devel/2008-04/msg01844.html
 383 OPTION_DEFAULT_ON([makeinfo],[don't require makeinfo for building manuals])
 384
 385 ## This might be a 'configure' arg.
 386 AC_SUBST([ACLOCAL_PATH])
 387
 388 ## Makefile.in needs the cache file name.
 389 AC_SUBST(cache_file)
 390
 391 ## This is an option because I do not know if all info/man support
 392 ## compressed files, nor how to test if they do so.
 393 OPTION_DEFAULT_ON([compress-install],
 394   [don't compress some files (.el, .info, etc.) when installing.  Equivalent to:
 395 make GZIP_PROG= install])
 396
 397 AC_ARG_WITH(gameuser,dnl
 398 [AS_HELP_STRING([--with-gameuser=USER_OR_GROUP],
 399                 [user for shared game score files.
 400                 An argument prefixed by ':' specifies a group instead.])])
 401 gameuser=
 402 gamegroup=
 403 # We don't test if we can actually chown/chgrp here, because configure
 404 # may run without root privileges.  lib-src/Makefile.in will handle
 405 # any errors due to missing user/group gracefully.
 406 case ${with_gameuser} in
 407   no) ;;
 408   "" | yes) gamegroup=games ;;
 409   :*) gamegroup=${with_gameuser#:} ;;
 410   *) gameuser=${with_gameuser} ;;
 411 esac
 412
 413 AC_ARG_WITH([gnustep-conf],dnl
 414 [AS_HELP_STRING([--with-gnustep-conf=FILENAME],
 415    [name of GNUstep configuration file to use on systems where the command
 416     'gnustep-config' does not work; default $GNUSTEP_CONFIG_FILE, or
 417     /etc/GNUstep/GNUstep.conf])])
 418 test "X${with_gnustep_conf}" != X && test "${with_gnustep_conf}" != yes && \
 419   GNUSTEP_CONFIG_FILE="${with_gnustep_conf}"
 420 test "X$GNUSTEP_CONFIG_FILE" = "X" && \
 421      GNUSTEP_CONFIG_FILE=/etc/GNUstep/GNUstep.conf
 422
 423 AC_ARG_ENABLE(ns-self-contained,
 424 [AS_HELP_STRING([--disable-ns-self-contained],
 425                 [disable self contained build under NeXTstep])],
 426    EN_NS_SELF_CONTAINED=$enableval,
 427    EN_NS_SELF_CONTAINED=yes)
 428
 429 locallisppathset=no
 430 AC_ARG_ENABLE(locallisppath,
 431 [AS_HELP_STRING([--enable-locallisppath=PATH],
 432                 [directories Emacs should search for lisp files specific
 433                  to this site])],
 434 if test "${enableval}" = "no"; then
 435   locallisppath=
 436 elif test "${enableval}" != "yes"; then
 437   locallisppath=${enableval} locallisppathset=yes
 438 fi)
 439
 440 AC_ARG_ENABLE(checking,
 441 [AS_HELP_STRING([--enable-checking@<:@=LIST@:>@],
 442                 [enable expensive run-time checks.  With LIST,
 443                  enable only specific categories of checks.
 444                  Categories are: all,yes,no.
 445                  Flags are: stringbytes, stringoverrun, stringfreelist,
 446                  xmallocoverrun, conslist, glyphs])],
 447 [ac_checking_flags="${enableval}"],[])
 448 IFS="${IFS=     }"; ac_save_IFS="$IFS"; IFS="$IFS,"
 449 for check in $ac_checking_flags
 450 do
 451         case $check in
 452         # these set all the flags to specific states
 453         yes)            ac_enable_checking=1 ;;
 454         no)             ac_enable_checking= ;
 455                         ac_gc_check_stringbytes= ;
 456                         ac_gc_check_string_overrun= ;
 457                         ac_gc_check_string_free_list= ;
 458                         ac_xmalloc_overrun= ;
 459                         ac_gc_check_cons_list= ;
 460                         ac_glyphs_debug= ;;
 461         all)            ac_enable_checking=1 ;
 462                         ac_gc_check_stringbytes=1 ;
 463                         ac_gc_check_string_overrun=1 ;
 464                         ac_gc_check_string_free_list=1 ;
 465                         ac_xmalloc_overrun=1 ;
 466                         ac_gc_check_cons_list=1 ;
 467                         ac_glyphs_debug=1 ;;
 468         # these enable particular checks
 469         stringbytes)    ac_gc_check_stringbytes=1 ;;
 470         stringoverrun)  ac_gc_check_string_overrun=1 ;;
 471         stringfreelist) ac_gc_check_string_free_list=1 ;;
 472         xmallocoverrun) ac_xmalloc_overrun=1 ;;
 473         conslist)       ac_gc_check_cons_list=1 ;;
 474         glyphs)         ac_glyphs_debug=1 ;;
 475         *)      AC_MSG_ERROR(unknown check category $check) ;;
 476         esac
 477 done
 478 IFS="$ac_save_IFS"
 479
 480 if test x$ac_enable_checking != x ; then
 481   AC_DEFINE(ENABLE_CHECKING, 1,
 482 [Define to 1 if expensive run-time data type and consistency checks are enabled.])
 483 fi
 484 if test x$ac_gc_check_stringbytes != x ; then
 485   AC_DEFINE(GC_CHECK_STRING_BYTES, 1,
 486 [Define this temporarily to hunt a bug.  If defined, the size of
 487    strings is redundantly recorded in sdata structures so that it can
 488    be compared to the sizes recorded in Lisp strings.])
 489 fi
 490 if test x$ac_gc_check_string_overrun != x ; then
 491   AC_DEFINE(GC_CHECK_STRING_OVERRUN, 1,
 492 [Define this to check for short string overrun.])
 493 fi
 494 if test x$ac_gc_check_string_free_list != x ; then
 495   AC_DEFINE(GC_CHECK_STRING_FREE_LIST, 1,
 496 [Define this to check the string free list.])
 497 fi
 498 if test x$ac_xmalloc_overrun != x ; then
 499   AC_DEFINE(XMALLOC_OVERRUN_CHECK, 1,
 500 [Define this to check for malloc buffer overrun.])
 501 fi
 502 if test x$ac_gc_check_cons_list != x ; then
 503   AC_DEFINE(GC_CHECK_CONS_LIST, 1,
 504 [Define this to check for errors in cons list.])
 505 fi
 506 if test x$ac_glyphs_debug != x ; then
 507   AC_DEFINE(GLYPH_DEBUG, 1,
 508 [Define this to enable glyphs debugging code.])
 509 fi
 510
 511 AC_ARG_ENABLE(check-lisp-object-type,
 512 [AS_HELP_STRING([--enable-check-lisp-object-type],
 513                 [enable compile time checks for the Lisp_Object data type.
 514                 This is useful for development for catching certain types of bugs.])],
 515 if test "${enableval}" != "no"; then
 516    AC_DEFINE(CHECK_LISP_OBJECT_TYPE, 1,
 517    [Define this to enable compile time checks for the Lisp_Object data type.])
 518 fi)
 519
 520
 521 dnl The name of this option is unfortunate.  It predates, and has no
 522 dnl relation to, the "sampling-based elisp profiler" added in 24.3.
 523 dnl Actually, it stops it working.
 524 dnl http://lists.gnu.org/archive/html/emacs-devel/2012-11/msg00393.html
 525 AC_ARG_ENABLE(profiling,
 526 [AS_HELP_STRING([--enable-profiling],
 527                 [build emacs with low-level, gprof profiling support.
 528                 Mainly useful for debugging Emacs itself.  May not work on
 529                 all platforms.  Stops profiler.el working.])],
 530 [ac_enable_profiling="${enableval}"],[])
 531 if test x$ac_enable_profiling != x ; then
 532    PROFILING_CFLAGS="-DPROFILING=1 -pg"
 533 else
 534    PROFILING_CFLAGS=
 535 fi
 536 AC_SUBST(PROFILING_CFLAGS)
 537
 538 AC_ARG_ENABLE(autodepend,
 539 [AS_HELP_STRING([--enable-autodepend],
 540                 [automatically generate dependencies to .h-files.
 541                  Requires gcc, enabled if found.])],
 542 [ac_enable_autodepend="${enableval}"],[ac_enable_autodepend=yes])
 543
 544 AC_ARG_ENABLE(gtk-deprecation-warnings,
 545 [AS_HELP_STRING([--enable-gtk-deprecation-warnings],
 546                 [Show Gtk+/Gdk deprecation warnings for Gtk+ >= 3.0])],
 547 [ac_enable_gtk_deprecation_warnings="${enableval}"],[])
 548
 549 dnl This used to use changequote, but, apart from 'changequote is evil'
 550 dnl per the autoconf manual, we can speed up autoconf somewhat by quoting
 551 dnl the great gob of text.  Thus it's not processed for possible expansion.
 552 dnl Just make sure the brackets remain balanced.
 553 dnl
 554 dnl Since Emacs can't find matching pairs of quotes, boundaries are
 555 dnl indicated by comments.
 556 dnl quotation begins
 557 [
 558
 559 ### If you add support for a new configuration, add code to this
 560 ### switch statement to recognize your configuration name and select
 561 ### the appropriate opsys.
 562
 563 ### As far as handling version numbers on operating systems is
 564 ### concerned, make sure things will fail in a fixable way.  If
 565 ### /etc/MACHINES doesn't say anything about version numbers, be
 566 ### prepared to handle anything reasonably.  If version numbers
 567 ### matter, be sure /etc/MACHINES says something about it.
 568
 569 opsys='' unported=no
 570 case "${canonical}" in
 571
 572   ## GNU/Linux and similar ports
 573   *-*-linux* )
 574     opsys=gnu-linux
 575   ;;
 576
 577   ## FreeBSD ports
 578   *-*-freebsd* )
 579     opsys=freebsd
 580   ;;
 581
 582   ## DragonFly ports
 583   *-*-dragonfly* )
 584     opsys=dragonfly
 585   ;;
 586
 587   ## FreeBSD kernel + glibc based userland
 588   *-*-kfreebsd*gnu* )
 589     opsys=gnu-kfreebsd
 590   ;;
 591
 592   ## NetBSD ports
 593   *-*-netbsd* )
 594     opsys=netbsd
 595   ;;
 596
 597   ## OpenBSD ports
 598   *-*-openbsd* | *-*-mirbsd* )
 599     opsys=openbsd
 600   ;;
 601
 602   ## Apple Darwin / Mac OS X
 603   *-apple-darwin* )
 604     case "${canonical}" in
 605       *-apple-darwin[0-9].*) unported=yes ;;
 606       i[3456]86-* | x86_64-* )  ;;
 607       * )            unported=yes ;;
 608     esac
 609     opsys=darwin
 610     ## Use fink packages if available.
 611     ## FIXME find a better way to do this: http://debbugs.gnu.org/11507
 612 ##    if test -d /sw/include && test -d /sw/lib; then
 613 ##      GCC_TEST_OPTIONS="-I/sw/include -L/sw/lib"
 614 ##      NON_GCC_TEST_OPTIONS=${GCC_TEST_OPTIONS}
 615 ##    fi
 616   ;;
 617
 618   ## Chromium Native Client
 619   *-nacl )
 620     opsys=nacl
 621   ;;
 622
 623   ## Cygwin ports
 624   *-*-cygwin )
 625     opsys=cygwin
 626   ;;
 627
 628   ## HP 9000 series 700 and 800, running HP/UX
 629   hppa*-hp-hpux10.2* )
 630     opsys=hpux10-20
 631   ;;
 632   hppa*-hp-hpux1[1-9]* )
 633     opsys=hpux11
 634     CFLAGS="-D_INCLUDE__STDC_A1_SOURCE $CFLAGS"
 635   ;;
 636
 637   ## IBM machines
 638   rs6000-ibm-aix4.[23]* )
 639     opsys=aix4-2
 640   ;;
 641   powerpc-ibm-aix4.[23]*  )
 642     opsys=aix4-2
 643   ;;
 644   rs6000-ibm-aix[56]* )
 645     opsys=aix4-2
 646   ;;
 647   powerpc-ibm-aix[5-9]* | powerpc-ibm-aix[1-9][0-9]* )
 648     opsys=aix4-2
 649   ;;
 650
 651   ## Silicon Graphics machines
 652   ## Iris 4D
 653   mips-sgi-irix6.5 )
 654     opsys=irix6-5
 655     # Without defining _LANGUAGE_C, things get masked out in the headers
 656     # so that, for instance, grepping for 'free' in stdlib.h fails and
 657     # AC_HEADER_STD_C fails.   (MIPSPro 7.2.1.2m compilers, Irix 6.5.3m).
 658     NON_GCC_TEST_OPTIONS="-D_LANGUAGE_C"
 659   ;;
 660
 661   ## Suns
 662   *-sun-solaris* \
 663     | i[3456]86-*-solaris2* | i[3456]86-*-sunos5* \
 664     | x86_64-*-solaris2*    | x86_64-*-sunos5*)
 665     case "${canonical}" in
 666       i[3456]86-*-* )   ;;
 667       amd64-*-*|x86_64-*-*) ;;
 668       sparc* )          ;;
 669       * )               unported=yes ;;
 670     esac
 671     case "${canonical}" in
 672       *-sunos5.[1-9][0-9]* | *-solaris2.[1-9][0-9]* )
 673                 opsys=sol2-10
 674                 emacs_check_sunpro_c=yes
 675                 ;;
 676       *-sunos5.[1-5]* | *-solaris2.[1-5]* ) unported=yes ;;
 677       ## Note that Emacs 23.1's NEWS said the following would be dropped.
 678       *-sunos5.6* | *-solaris2.6* )
 679                 opsys=sol2-6
 680                 RANLIB="ar -ts"
 681                 ;;
 682       ## 5.7 EOL Aug 2008, 5.8 EOL Mar 2012.
 683       *-sunos5.[7-9]* | *-solaris2.[7-9]* )
 684                 opsys=sol2-6
 685                 emacs_check_sunpro_c=yes
 686                 ;;
 687     esac
 688     ## Watch out for a compiler that we know will not work.
 689     case "${canonical}" in
 690      *-solaris* | *-sunos5* )
 691                 if [ "x$CC" = x/usr/ucb/cc ]; then
 692                   ## /usr/ucb/cc doesn't work;
 693                   ## we should find some other compiler that does work.
 694                   unset CC
 695                 fi
 696                 ;;
 697       *) ;;
 698     esac
 699   ;;
 700
 701   ## Intel 386 machines where we don't care about the manufacturer.
 702   i[3456]86-*-* )
 703     case "${canonical}" in
 704       *-darwin* )               opsys=darwin ;;
 705       *-mingw* )
 706                 opsys=mingw32
 707                 # MinGW overrides and adds some system headers in nt/inc.
 708                 GCC_TEST_OPTIONS="-I $srcdir/nt/inc"
 709                 ;;
 710       *-sysv4.2uw* )            opsys=unixware ;;
 711       *-sysv5uw* )              opsys=unixware ;;
 712       *-sysv5OpenUNIX* )        opsys=unixware ;;
 713       ## Otherwise, we'll fall through to the generic opsys code at the bottom.
 714     esac
 715   ;;
 716
 717   # MinGW64
 718   x86_64-*-* )
 719     case "${canonical}" in
 720       *-mingw* )
 721                 opsys=mingw32
 722                 # MinGW overrides and adds some system headers in nt/inc.
 723                 GCC_TEST_OPTIONS="-I $srcdir/nt/inc"
 724                 ;;
 725       ## Otherwise, we'll fall through to the generic opsys code at the bottom.
 726     esac
 727   ;;
 728
 729   * )
 730     unported=yes
 731   ;;
 732 esac
 733
 734 ### If the code above didn't choose an operating system, just choose
 735 ### an operating system based on the configuration name.  You really
 736 ### only want to use this when you have no idea what the right
 737 ### operating system is; if you know what operating systems a machine
 738 ### runs, it's cleaner to make it explicit in the case statement
 739 ### above.
 740 if test x"${opsys}" = x; then
 741   case "${canonical}" in
 742     *-gnu* )                            opsys=gnu ;;
 743     * )
 744       unported=yes
 745     ;;
 746   esac
 747 fi
 748
 749 ]
 750 dnl quotation ends
 751
 752 if test $unported = yes; then
 753   AC_MSG_ERROR([Emacs does not support '${canonical}' systems.
 754 If you think it should, please send a report to ${PACKAGE_BUGREPORT}.
 755 Check 'etc/MACHINES' for recognized configuration names.])
 756 fi
 757
 758 #### Choose a compiler.
 759
 760 dnl Don't bother to test for C89.
 761 AC_DEFUN([_AC_PROG_CC_C89], [$2])
 762
 763 dnl Sets GCC=yes if using gcc.
 764 AC_PROG_CC([gcc cc cl clang "$XCRUN gcc" "$XCRUN clang"])
 765 if test -n "$XCRUN"; then
 766   AC_CHECK_PROGS(AR, [ar "$XCRUN ar"])
 767   test -n "$AR" && export AR
 768 fi
 769
 770 dnl Emacs needs C99 or later.
 771 gl_PROG_CC_C99
 772
 773 AM_PROG_CC_C_O
 774
 775 if test x$GCC = xyes; then
 776   test "x$GCC_TEST_OPTIONS" != x && CC="$CC $GCC_TEST_OPTIONS"
 777 else
 778   test "x$NON_GCC_TEST_OPTIONS" != x && CC="$CC $NON_GCC_TEST_OPTIONS"
 779 fi
 780
 781 dnl This is used in lib/Makefile.am to use nt/gnulib.mk, the
 782 dnl alternative to lib/gnulib.mk, so as to avoid generating header files
 783 dnl that clash with MinGW.
 784 AM_CONDITIONAL([BUILDING_FOR_WINDOWSNT], [test "x$opsys" = "xmingw32"])
 785
 786 # Avoid gnulib's tests for -lcrypto, so that there's no static dependency on it.
 787 AC_DEFUN([gl_CRYPTO_CHECK])
 788 # Avoid gnulib's tests for HAVE_WORKING_O_NOATIME and HAVE_WORKING_O_NOFOLLOW,
 789 # as we don't use them.
 790 AC_DEFUN([gl_FCNTL_O_FLAGS])
 791 # Avoid gnulib's test for pthread_sigmask.
 792 funcs=
 793 for func in $ac_func_list; do
 794   test $func = pthread_sigmask || AS_VAR_APPEND([funcs], [" $func"])
 795 done
 796 ac_func_list=$funcs
 797 # Use the system putenv even if it lacks GNU features, as we don't need them,
 798 # and the gnulib replacement runs afoul of a FreeBSD 10.1 bug; see Bug#19874.
 799 AC_CHECK_FUNCS_ONCE([putenv])
 800 AC_DEFUN([gl_FUNC_PUTENV],
 801   [test "$ac_cv_func_putenv" = yes || REPLACE_PUTENV=1])
 802
 803 # Initialize gnulib right after choosing the compiler.
 804 dnl Amongst other things, this sets AR and ARFLAGS.
 805 gl_EARLY
 806
 807 if test "$ac_test_CFLAGS" != set; then
 808   # It's helpful to have C macros available to GDB, so prefer -g3 to -g
 809   # if -g3 works and the user does not specify CFLAGS.
 810   # This test must follow gl_EARLY; otherwise AC_LINK_IFELSE complains.
 811   case $CFLAGS in
 812     '-g')
 813       emacs_g3_CFLAGS='-g3';;
 814     '-g -O2')
 815       emacs_g3_CFLAGS='-g3 -O2';;
 816     *)
 817       emacs_g3_CFLAGS='';;
 818   esac
 819   if test -n "$emacs_g3_CFLAGS"; then
 820     emacs_save_CFLAGS=$CFLAGS
 821     CFLAGS=$emacs_g3_CFLAGS
 822     AC_CACHE_CHECK([whether $CC accepts $emacs_g3_CFLAGS],
 823       [emacs_cv_prog_cc_g3],
 824       [AC_LINK_IFELSE([AC_LANG_PROGRAM()],
 825          [emacs_cv_prog_cc_g3=yes],
 826          [emacs_cv_prog_cc_g3=no])])
 827     if test $emacs_cv_prog_cc_g3 != yes; then
 828       CFLAGS=$emacs_save_CFLAGS
 829     fi
 830     if test $opsys = mingw32; then
 831       CFLAGS="$CFLAGS -gdwarf-2"
 832     fi
 833   fi
 834
 835   case $CFLAGS in
 836     *-O*) ;;
 837     *)
 838       # No optimization flag was inferred for this non-GCC compiler.
 839       # Try -O.  This is needed for xlc on AIX; see Bug#14258.
 840       emacs_save_CFLAGS=$CFLAGS
 841       test -z "$CFLAGS" || CFLAGS="$CFLAGS "
 842       CFLAGS=${CFLAGS}-O
 843       AC_CACHE_CHECK([whether $CC accepts -O],
 844         [emacs_cv_prog_cc_o],
 845         [AC_LINK_IFELSE([AC_LANG_PROGRAM()],
 846            [emacs_cv_prog_cc_o=yes],
 847            [emacs_cv_prog_cc_o=no])])
 848       if test $emacs_cv_prog_cc_o != yes; then
 849         CFLAGS=$emacs_save_CFLAGS
 850       fi ;;
 851   esac
 852 fi
 853
 854 AC_ARG_ENABLE([gcc-warnings],
 855   [AS_HELP_STRING([--enable-gcc-warnings],
 856                   [turn on lots of GCC warnings/errors. This is intended for
 857                    developers, and may generate false alarms when used
 858                    with older or non-GNU development tools.])],
 859   [case $enableval in
 860      yes|no) ;;
 861      *)      AC_MSG_ERROR([bad value $enableval for gcc-warnings option]) ;;
 862    esac
 863    gl_gcc_warnings=$enableval],
 864   [gl_gcc_warnings=no]
 865 )
 866
 867 # clang is unduly picky about some things.
 868 AC_CACHE_CHECK([whether the compiler is clang], [emacs_cv_clang],
 869   [AC_COMPILE_IFELSE(
 870      [AC_LANG_PROGRAM([[
 871           #ifndef __clang__
 872             error "not clang";
 873           #endif
 874         ]])],
 875      [emacs_cv_clang=yes],
 876      [emacs_cv_clang=no])])
 877
 878 # When compiling with GCC, prefer -isystem to -I when including system
 879 # include files, to avoid generating useless diagnostics for the files.
 880 if test "$gl_gcc_warnings" != yes; then
 881   isystem='-I'
 882   if test "$emacs_cv_clang" = yes
 883   then
 884      # Turn off some warnings if supported.
 885      gl_WARN_ADD([-Wno-switch])
 886      gl_WARN_ADD([-Wno-tautological-constant-out-of-range-compare])
 887      gl_WARN_ADD([-Wno-pointer-sign])
 888      gl_WARN_ADD([-Wno-string-plus-int])
 889      gl_WARN_ADD([-Wno-unknown-attributes])
 890   fi
 891 else
 892   isystem='-isystem '
 893
 894   # This, $nw, is the list of warnings we disable.
 895   nw=
 896
 897   case $with_x_toolkit in
 898     lucid | athena | motif)
 899        # Old toolkits mishandle 'const'.
 900        nw="$nw -Wwrite-strings"
 901        ;;
 902     *)
 903        gl_WARN_ADD([-Werror], [WERROR_CFLAGS])
 904        ;;
 905   esac
 906   AC_SUBST([WERROR_CFLAGS])
 907
 908   nw="$nw -Wsystem-headers"         # Don't let system headers trigger warnings
 909   nw="$nw -Woverlength-strings"     # Not a problem these days
 910   nw="$nw -Wformat-nonliteral"      # we do this a lot
 911   nw="$nw -Wvla"                    # Emacs uses <vla.h>.
 912   nw="$nw -Wswitch-default"         # Too many warnings for now
 913   nw="$nw -Winline"                 # OK to ignore 'inline'
 914   nw="$nw -Wjump-misses-init"       # We sometimes safely jump over init.
 915   nw="$nw -Wstrict-overflow"        # OK to optimize assuming that
 916                                     # signed overflow has undefined behavior
 917   nw="$nw -Wsync-nand"              # irrelevant here, and provokes ObjC warning
 918   nw="$nw -Wunsafe-loop-optimizations" # OK to suppress unsafe optimizations
 919   nw="$nw -Wbad-function-cast"      # These casts are no worse than others.
 920
 921   # Emacs doesn't care about shadowing; see
 922   # <http://lists.gnu.org/archive/html/emacs-diffs/2011-11/msg00265.html>.
 923   nw="$nw -Wshadow"
 924
 925   # Emacs's use of alloca inhibits protecting the stack.
 926   nw="$nw -Wstack-protector"
 927
 928   # Emacs's use of partly-const functions such as Fgnutls_available_p
 929   # make this option problematic.
 930   nw="$nw -Wsuggest-attribute=const"
 931
 932   # Emacs's use of partly-pure functions such as CHECK_TYPE make this
 933   # option problematic.
 934   nw="$nw -Wsuggest-attribute=pure"
 935
 936   # This part is merely for shortening the command line,
 937   # since -Wall implies -Wswitch.
 938   nw="$nw -Wswitch"
 939
 940   # This part is merely for shortening the command line,
 941   # since -Wno-FOO needs to be added below regardless.
 942   nw="$nw -Wmissing-field-initializers"
 943   nw="$nw -Wtype-limits"
 944   nw="$nw -Wunused-parameter"
 945
 946   if test $emacs_cv_clang = yes; then
 947     nw="$nw -Wcast-align"
 948   fi
 949
 950   gl_MANYWARN_ALL_GCC([ws])
 951   gl_MANYWARN_COMPLEMENT([ws], [$ws], [$nw])
 952   for w in $ws; do
 953     gl_WARN_ADD([$w])
 954   done
 955   gl_WARN_ADD([-Wredundant-decls])     # Prefer this, as we don't use Bison.
 956   gl_WARN_ADD([-Wno-missing-field-initializers]) # We need this one
 957   gl_WARN_ADD([-Wno-sign-compare])     # Too many warnings for now
 958   gl_WARN_ADD([-Wno-type-limits])      # Too many warnings for now
 959   gl_WARN_ADD([-Wno-unused-parameter]) # Too many warnings for now
 960   gl_WARN_ADD([-Wno-format-nonliteral])
 961
 962   # More things that clang is unduly picky about.
 963   if test $emacs_cv_clang = yes; then
 964     gl_WARN_ADD([-Wno-format-extra-args])
 965     gl_WARN_ADD([-Wno-tautological-constant-out-of-range-compare])
 966     gl_WARN_ADD([-Wno-unused-command-line-argument])
 967     gl_WARN_ADD([-Wno-unused-value])
 968   fi
 969
 970   AC_DEFINE([lint], [1], [Define to 1 if the compiler is checking for lint.])
 971   AC_DEFINE([GNULIB_PORTCHECK], [1], [enable some gnulib portability checks])
 972   AH_VERBATIM([GNULIB_PORTCHECK_FORTIFY_SOURCE],
 973   [/* Enable compile-time and run-time bounds-checking, and some warnings,
 974       without upsetting glibc 2.15+. */
 975    #if (defined GNULIB_PORTCHECK && !defined _FORTIFY_SOURCE \
 976         && defined __OPTIMIZE__ && __OPTIMIZE__)
 977    # define _FORTIFY_SOURCE 2
 978    #endif
 979   ])
 980
 981   # We use a slightly smaller set of warning options for lib/.
 982   # Remove the following and save the result in GNULIB_WARN_CFLAGS.
 983   nw=
 984   nw="$nw -Wunused-macros"
 985
 986   gl_MANYWARN_COMPLEMENT([GNULIB_WARN_CFLAGS], [$WARN_CFLAGS], [$nw])
 987   AC_SUBST([GNULIB_WARN_CFLAGS])
 988 fi
 989
 990 edit_cflags="
 991   s,///*,/,g
 992   s/^/ /
 993   s/ -I/ $isystem/g
 994   s/^ //
 995 "
 996
 997 AC_ARG_ENABLE(link-time-optimization,
 998 [AS_HELP_STRING([--enable-link-time-optimization],
 999                 [build emacs with link-time optimization.
1000                  This requires GCC 4.5.0 or later, or clang.
1001                  (Note that clang support is experimental - see INSTALL.)
1002                  It also makes Emacs harder to debug, and when we tried it
1003                  with GCC 4.9.0 x86-64 it made Emacs slower, so it's not
1004                  recommended for typical use.])],
1005 if test "${enableval}" != "no"; then
1006    ac_lto_supported=no
1007    if test $emacs_cv_clang = yes; then
1008       AC_MSG_CHECKING([whether link-time optimization is supported by clang])
1009       GOLD_PLUGIN=`$CC -print-file-name=LLVMgold.so 2>/dev/null`
1010       if test -x "$GOLD_PLUGIN"; then
1011          LTO="-flto"
1012       fi
1013    elif test x$GCC = xyes; then
1014       AC_MSG_CHECKING([whether link-time optimization is supported by gcc])
1015       CPUS=`getconf _NPROCESSORS_ONLN 2>/dev/null`
1016       if test x$CPUS != x; then
1017          LTO="-flto=$CPUS"
1018       else
1019          LTO="-flto"
1020       fi
1021    else
1022       AC_MSG_ERROR([Link-time optimization is not supported with your compiler.])
1023    fi
1024    if test -z "$LTO"; then
1025       ac_lto_supported=no
1026    else
1027       old_CFLAGS=$CFLAGS
1028       CFLAGS="$CFLAGS $LTO"
1029       AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
1030          [ac_lto_supported=yes], [ac_lto_supported=no])
1031          CFLAGS="$old_CFLAGS"
1032    fi
1033    AC_MSG_RESULT([$ac_lto_supported])
1034    if test "$ac_lto_supported" = "yes"; then
1035       CFLAGS="$CFLAGS $LTO"
1036       if test x$emacs_cv_clang = xyes; then
1037          AC_MSG_WARN([Please read INSTALL before using link-time optimization with clang])
1038          # WARNING: 'ar --plugin ...' doesn't work without
1039          # command, so plugin name is appended to ARFLAGS.
1040          ARFLAGS="cru --plugin $GOLD_PLUGIN"
1041          RANLIB="$RANLIB --plugin $GOLD_PLUGIN"
1042       else
1043         dnl The following is needed for GCC 4.9.0.  The GCC 4.9.0 release notes
1044         dnl suggest that instead of -ffat-lto-objects we should use gcc-ar and
1045         dnl gcc-ranlib in place of ar and ranlib, but gcc-ar makes /usr/bin/ar
1046         dnl dump core on Fedora 20, so play it safe for now.
1047         gl_COMPILER_OPTION_IF([-ffat-lto-objects],
1048           [CFLAGS="$CFLAGS -ffat-lto-objects"])
1049       fi
1050    fi
1051 fi)
1052
1053 dnl Prefer silent make output.  For verbose output, use
1054 dnl 'configure --disable-silent-rules' or 'make V=1' .
1055 AM_SILENT_RULES([yes])
1056 dnl Port to Automake 1.11.
1057 dnl This section can be removed once we assume Automake 1.14 or later.
1058 : ${AM_V=$AM_DEFAULT_VERBOSITY}
1059 : ${AM_DEFAULT_V=$AM_DEFAULT_VERBOSITY}
1060 AC_SUBST([AM_V])
1061 AM_SUBST_NOTMAKE([AM_V])
1062 AC_SUBST([AM_DEFAULT_V])
1063 AM_SUBST_NOTMAKE([AM_DEFAULT_V])
1064 AC_SUBST([AM_DEFAULT_VERBOSITY])
1065
1066 dnl Some other nice autoconf tests.
1067 dnl These are commented out, since gl_EARLY and/or Autoconf already does them.
1068 dnl AC_PROG_INSTALL
1069 dnl AC_PROG_MKDIR_P
1070 dnl if test "x$RANLIB" = x; then
1071 dnl   AC_PROG_RANLIB
1072 dnl fi
1073
1074
1075 dnl Sadly, AC_PROG_LN_S is too restrictive.  It also tests whether links
1076 dnl can be made to directories.  This is not relevant for our usage, and
1077 dnl excludes some cases that work fine for us.  Eg MS Windows or files
1078 dnl hosted on AFS, both examples where simple links work, but links to
1079 dnl directories fail.  We use a cut-down version instead.
1080 dnl AC_PROG_LN_S
1081
1082 AC_MSG_CHECKING([whether ln -s works for files in the same directory])
1083 rm -f conf$$ conf$$.file
1084
1085 LN_S_FILEONLY='cp -p'
1086
1087 dnl On MinGW, ensure we will call the MSYS /bin/ln.exe, not some
1088 dnl random program in the current directory.
1089 if (echo >conf$$.file) 2>/dev/null; then
1090   if ln -s conf$$.file conf$$ 2>/dev/null; then
1091     if test "$opsys" = "mingw32"; then
1092       LN_S_FILEONLY='/bin/ln -s'
1093     else
1094       LN_S_FILEONLY='ln -s'
1095     fi
1096   elif ln conf$$.file conf$$ 2>/dev/null; then
1097     if test "$opsys" = "mingw32"; then
1098       LN_S_FILEONLY=/bin/ln
1099     else
1100       LN_S_FILEONLY=ln
1101     fi
1102   fi
1103 fi
1104
1105 rm -f conf$$ conf$$.file
1106
1107 if test "$LN_S_FILEONLY" = "ln -s"; then
1108    AC_MSG_RESULT([yes])
1109 else
1110    AC_MSG_RESULT([no, using $LN_S_FILEONLY])
1111 fi
1112
1113 AC_SUBST(LN_S_FILEONLY)
1114
1115
1116 dnl AC_PROG_LN_S sets LN_S to 'cp -pR' for MinGW, on the premise that 'ln'
1117 dnl doesn't support links to directories, as in "ln file dir".  But that
1118 dnl use is non-portable, and OTOH MinGW wants to use hard links for Emacs
1119 dnl executables at "make install" time.
1120 dnl See http://lists.gnu.org/archive/html/emacs-devel/2013-04/msg00475.html
1121 dnl for more details.
1122 if test "$opsys" = "mingw32"; then
1123   LN_S="/bin/ln"
1124 fi
1125
1126 dnl On some Debian versions, "install-info" prints irritating messages
1127 dnl "This is not dpkg install-info anymore, but GNU install-info"
1128 dnl if called via an absolute file name.
1129 dnl Use the entirely-identical-but-quieter ginstall-info instead if present.
1130 dnl Sadly some people may have an old ginstall-info installed on
1131 dnl non-Debian systems, so we can't use this.
1132 dnl AC_PATH_PROGS(INSTALL_INFO, [ginstall-info install-info], :,
1133 dnl   $PATH$PATH_SEPARATOR/usr/sbin$PATH_SEPARATOR/sbin)
1134
1135 AC_PATH_PROG(INSTALL_INFO, install-info, :,
1136   $PATH$PATH_SEPARATOR/usr/sbin$PATH_SEPARATOR/sbin)
1137 dnl Don't use GZIP, which is used by gzip for additional parameters.
1138 AC_PATH_PROG(GZIP_PROG, gzip)
1139
1140 test $with_compress_install != yes && test -n "$GZIP_PROG" && \
1141    GZIP_PROG=" # $GZIP_PROG # (disabled by configure --without-compress-install)"
1142
1143 if test $opsys = gnu-linux; then
1144   AC_PATH_PROG(PAXCTL, paxctl,,
1145     [$PATH$PATH_SEPARATOR/sbin$PATH_SEPARATOR/usr/sbin])
1146   if test "X$PAXCTL" != X; then
1147     AC_MSG_CHECKING([whether binaries have a PT_PAX_FLAGS header])
1148     AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])],
1149       [if $PAXCTL -v conftest$EXEEXT >/dev/null 2>&1; then AC_MSG_RESULT(yes)
1150       else AC_MSG_RESULT(no); PAXCTL=""; fi])
1151   fi
1152
1153   if test "${SETFATTR+set}" != set; then
1154     AC_CACHE_CHECK([for setfattr],
1155       [emacs_cv_prog_setfattr],
1156       [touch conftest.tmp
1157        if (setfattr -n user.pax.flags conftest.tmp) >/dev/null 2>&1; then
1158          emacs_cv_prog_setfattr=yes
1159        else
1160          emacs_cv_prog_setfattr=no
1161        fi])
1162     if test "$emacs_cv_prog_setfattr" = yes; then
1163       SETFATTR=setfattr
1164     else
1165       SETFATTR=
1166     fi
1167     rm -f conftest.tmp
1168     AC_SUBST([SETFATTR])
1169   fi
1170 fi
1171
1172 ## Need makeinfo >= 4.7 (?) to build the manuals.
1173 if test "$MAKEINFO" != "no"; then
1174   if test "$MAKEINFO" = "${am_missing_run}makeinfo"; then
1175     MAKEINFO=makeinfo
1176   fi
1177   case `($MAKEINFO --version) 2>/dev/null` in
1178     *' (GNU texinfo) '4.[[7-9]]* | \
1179     *' (GNU texinfo) '4.[[1-9][0-9]]* | \
1180     *' (GNU texinfo) '[[5-9]]* | \
1181     *' (GNU texinfo) '[[1-9][0-9]]* ) ;;
1182     *) MAKEINFO=no;;
1183   esac
1184 fi
1185
1186 ## Makeinfo is unusual.  For a released Emacs, the manuals are
1187 ## pre-built, and not deleted by the normal clean rules.  makeinfo is
1188 ## therefore in the category of "special tools" not normally required, which
1189 ## configure does not have to check for (eg autoconf itself).
1190 ## In a repository checkout on the other hand, the manuals are not included.
1191 ## So makeinfo is a requirement to build from the repository, and configure
1192 ## should test for it as it does for any other build requirement.
1193 ## We use the presence of $srcdir/info/emacs to distinguish a release,
1194 ## with pre-built manuals, from a repository checkout.
1195 HAVE_MAKEINFO=yes
1196
1197 if test "$MAKEINFO" = "no"; then
1198   MAKEINFO=makeinfo
1199   if test "x${with_makeinfo}" = "xno"; then
1200     HAVE_MAKEINFO=no
1201   elif test ! -e "$srcdir/info/emacs" && test ! -e "$srcdir/info/emacs.info"; then
1202     AC_MSG_ERROR( [You do not seem to have makeinfo >= 4.7, and your
1203 source tree does not seem to have pre-built manuals in the 'info' directory.
1204 Either install a suitable version of makeinfo, or re-run configure
1205 with the '--without-makeinfo' option to build without the manuals.] )
1206   fi
1207 fi
1208 AC_SUBST(HAVE_MAKEINFO)
1209
1210 if test $opsys = mingw32; then
1211    DOCMISC_W32=efaq-w32
1212 else
1213    DOCMISC_W32=
1214 fi
1215 AC_SUBST(DOCMISC_W32)
1216
1217 dnl Add our options to ac_link now, after it is set up.
1218
1219 if test x$GCC = xyes; then
1220   test "x$GCC_LINK_TEST_OPTIONS" != x && \
1221     ac_link="$ac_link $GCC_LINK_TEST_OPTIONS"
1222 else
1223   test "x$NON_GCC_LINK_TEST_OPTIONS" != x && \
1224     ac_link="$ac_link $NON_GCC_LINK_TEST_OPTIONS"
1225 fi
1226
1227 dnl We need -znocombreloc if we're using a relatively recent GNU ld.
1228 dnl If we can link with the flag, it shouldn't do any harm anyhow.
1229 dnl (Don't use '-z nocombreloc' as -z takes no arg on Irix.)
1230 dnl Treat GCC specially since it just gives a non-fatal 'unrecognized option'
1231 dnl if not built to support GNU ld.
1232
1233 dnl For a long time, -znocombreloc was added to LDFLAGS rather than
1234 dnl LD_SWITCH_SYSTEM_TEMACS.  That is:
1235 dnl * inappropriate, as LDFLAGS is a user option but this is essential.
1236 dnl   Eg "make LDFLAGS=... all" could run into problems,
1237 dnl   http://bugs.debian.org/684788
1238 dnl * unnecessary, since temacs is the only thing that actually needs it.
1239 dnl   Indeed this is where it was originally, prior to:
1240 dnl   http://lists.gnu.org/archive/html/emacs-pretest-bug/2004-03/msg00170.html
1241 late_LDFLAGS="$LDFLAGS"
1242 if test x$GCC = xyes; then
1243   LDFLAGS_NOCOMBRELOC="-Wl,-znocombreloc"
1244 else
1245   LDFLAGS_NOCOMBRELOC="-znocombreloc"
1246 fi
1247
1248 LDFLAGS="$LDFLAGS $LDFLAGS_NOCOMBRELOC"
1249
1250 AC_MSG_CHECKING([for -znocombreloc])
1251 AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])],
1252   [AC_MSG_RESULT(yes)],
1253   LDFLAGS_NOCOMBRELOC=
1254   [AC_MSG_RESULT(no)])
1255
1256 LDFLAGS="$late_LDFLAGS"
1257
1258 AC_CACHE_CHECK([whether addresses are sanitized],
1259   [emacs_cv_sanitize_address],
1260   [AC_COMPILE_IFELSE(
1261      [AC_LANG_PROGRAM(
1262         [[#ifndef __has_feature
1263           #define __has_feature(f) 0
1264           #endif
1265           #if defined __SANITIZE_ADDRESS__ || __has_feature (address_sanitizer)
1266           #else
1267            error "Addresses are not sanitized.";
1268           #endif
1269         ]])],
1270      [emacs_cv_sanitize_address=yes],
1271      [emacs_cv_sanitize_address=no])])
1272
1273 dnl The function dump-emacs will not be defined and temacs will do
1274 dnl (load "loadup") automatically unless told otherwise.
1275 test "x$CANNOT_DUMP" = "x" && CANNOT_DUMP=no
1276 case "$opsys" in
1277   nacl) CANNOT_DUMP=yes ;;
1278 esac
1279
1280 if test "$CANNOT_DUMP" = "yes"; then
1281   AC_DEFINE(CANNOT_DUMP, 1, [Define if Emacs cannot be dumped on your system.])
1282 elif test "$emacs_cv_sanitize_address" = yes; then
1283   AC_MSG_WARN([[Addresses are sanitized; suggest CANNOT_DUMP=yes]])
1284 fi
1285
1286 AC_SUBST(CANNOT_DUMP)
1287
1288
1289 UNEXEC_OBJ=unexelf.o
1290 case "$opsys" in
1291   # MSDOS uses unexcoff.o
1292   aix4-2)
1293    UNEXEC_OBJ=unexaix.o
1294    ;;
1295   cygwin)
1296    UNEXEC_OBJ=unexcw.o
1297    ;;
1298   darwin)
1299    UNEXEC_OBJ=unexmacosx.o
1300    ;;
1301   hpux10-20 | hpux11)
1302    UNEXEC_OBJ=unexhp9k800.o
1303    ;;
1304   mingw32)
1305    UNEXEC_OBJ=unexw32.o
1306    ;;
1307   sol2-10)
1308    # Use the Solaris dldump() function, called from unexsol.c, to dump
1309    # emacs, instead of the generic ELF dump code found in unexelf.c.
1310    # The resulting binary has a complete symbol table, and is better
1311    # for debugging and other observability tools (debuggers, pstack, etc).
1312    #
1313    # If you encounter a problem using dldump(), please consider sending
1314    # a message to the OpenSolaris tools-linking mailing list:
1315    #      http://mail.opensolaris.org/mailman/listinfo/tools-linking
1316    #
1317    # It is likely that dldump() works with older Solaris too, but this has
1318    # not been tested, so for now this change is for Solaris 10 or newer.
1319    UNEXEC_OBJ=unexsol.o
1320    ;;
1321 esac
1322
1323 LD_SWITCH_SYSTEM=
1324 case "$opsys" in
1325   freebsd|dragonfly)
1326    ## Let 'ld' find image libs and similar things in /usr/local/lib.
1327    ## The system compiler, GCC, has apparently been modified to not
1328    ## look there, contrary to what a stock GCC would do.
1329 ### It's not our place to do this.  See bug#10313#17.
1330 ###   LD_SWITCH_SYSTEM=-L/usr/local/lib
1331       :
1332    ;;
1333
1334   gnu-linux)
1335    ## cpp test was "ifdef __mips__", but presumably this is equivalent...
1336    case $host_cpu in mips*) LD_SWITCH_SYSTEM="-G 0";; esac
1337    ;;
1338
1339   netbsd)
1340 ### It's not our place to do this.  See bug#10313#17.
1341 ###   LD_SWITCH_SYSTEM="-Wl,-rpath,/usr/pkg/lib -L/usr/pkg/lib -Wl,-rpath,/usr/local/lib -L/usr/local/lib"
1342       :
1343    ;;
1344
1345   openbsd)
1346    ## Han Boetes <han@boetes.org> says this is necessary,
1347    ## otherwise Emacs dumps core on elf systems.
1348    LD_SWITCH_SYSTEM="-Z"
1349    ;;
1350 esac
1351 AC_SUBST(LD_SWITCH_SYSTEM)
1352
1353 ac_link="$ac_link $LD_SWITCH_SYSTEM"
1354
1355 ## This setting of LD_SWITCH_SYSTEM references LD_SWITCH_X_SITE_RPATH,
1356 ## which has not been defined yet.  When this was handled with cpp,
1357 ## it was expanded to null when configure sourced the s/*.h file.
1358 ## Thus LD_SWITCH_SYSTEM had different values in configure and the Makefiles.
1359 ## FIXME it would be cleaner to put this in LD_SWITCH_SYSTEM_TEMACS
1360 ## (or somesuch), but because it is supposed to go at the _front_
1361 ## of LD_SWITCH_SYSTEM, we cannot do that in exactly the same way.
1362 ## Compare with the gnu-linux case below, which added to the end
1363 ## of LD_SWITCH_SYSTEM, and so can instead go at the front of
1364 ## LD_SWITCH_SYSTEM_TEMACS.
1365 case "$opsys" in
1366   netbsd|openbsd)
1367    LD_SWITCH_SYSTEM="\$(LD_SWITCH_X_SITE_RPATH) $LD_SWITCH_SYSTEM" ;;
1368 esac
1369
1370
1371 C_SWITCH_MACHINE=
1372 case $canonical in
1373  alpha*)
1374   AC_CHECK_DECL([__ELF__])
1375   if test "$ac_cv_have_decl___ELF__" = "yes"; then
1376     ## With ELF, make sure that all common symbols get allocated to in the
1377     ## data section.  Otherwise, the dump of temacs may miss variables in
1378     ## the shared library that have been initialized.  For example, with
1379     ## GNU libc, __malloc_initialized would normally be resolved to the
1380     ## shared library's .bss section, which is fatal.
1381     if test "x$GCC" = "xyes"; then
1382       C_SWITCH_MACHINE="-fno-common"
1383     else
1384       AC_MSG_ERROR([Non-GCC compilers are not supported.])
1385     fi
1386   else
1387       dnl This was the unexalpha.c case.  Removed in 24.1, 2010-07-24,
1388       dnl albeit under the mistaken assumption that said file
1389       dnl was no longer used.
1390       AC_MSG_ERROR([Non-ELF systems are not supported since Emacs 24.1.])
1391   fi
1392   ;;
1393 esac
1394 AC_SUBST(C_SWITCH_MACHINE)
1395
1396 AC_SUBST(UNEXEC_OBJ)
1397
1398 C_SWITCH_SYSTEM=
1399 ## Some programs in src produce warnings saying certain subprograms
1400 ## are too complex and need a MAXMEM value greater than 2000 for
1401 ## additional optimization.  --nils@exp-math.uni-essen.de
1402 test "$opsys" = "aix4.2" && test "x$GCC" != "xyes" && \
1403   C_SWITCH_SYSTEM="-ma -qmaxmem=4000"
1404 if test "$opsys" = "mingw32"; then
1405   case "$canonical" in
1406     x86_64-*-mingw*) C_SWITCH_SYSTEM="-mtune=generic" ;;
1407     *) C_SWITCH_SYSTEM="-mtune=pentium4" ;;
1408   esac
1409 fi
1410 ## gnu-linux might need -D_BSD_SOURCE on old libc5 systems.
1411 ## It is redundant in glibc2, since we define _GNU_SOURCE.
1412 AC_SUBST(C_SWITCH_SYSTEM)
1413
1414
1415 LIBS_SYSTEM=
1416 case "$opsys" in
1417   ## IBM's X11R5 uses -lIM and -liconv in AIX 3.2.2.
1418   aix4-2) LIBS_SYSTEM="-lrts -lIM -liconv" ;;
1419
1420   freebsd|dragonfly) LIBS_SYSTEM="-lutil" ;;
1421
1422   hpux*) LIBS_SYSTEM="-l:libdld.sl" ;;
1423
1424   sol2*) LIBS_SYSTEM="-lsocket -lnsl" ;;
1425
1426   ## Motif needs -lgen.
1427   unixware) LIBS_SYSTEM="-lsocket -lnsl -lelf -lgen" ;;
1428 esac
1429
1430 AC_SUBST(LIBS_SYSTEM)
1431
1432 ### Make sure subsequent tests use flags consistent with the build flags.
1433
1434 if test x"${OVERRIDE_CPPFLAGS}" != x; then
1435   CPPFLAGS="${OVERRIDE_CPPFLAGS}"
1436 else
1437   CPPFLAGS="$C_SWITCH_SYSTEM $C_SWITCH_MACHINE $CPPFLAGS"
1438 fi
1439
1440 # Suppress obsolescent Autoconf test for size_t; Emacs assumes C99 or better.
1441 AC_DEFUN([AC_TYPE_SIZE_T])
1442 # Likewise for obsolescent test for uid_t, gid_t; Emacs assumes them.
1443 AC_DEFUN([AC_TYPE_UID_T])
1444
1445 # sqrt and other floating-point functions such as fmod and frexp
1446 # are found in -lm on many systems.
1447 OLD_LIBS=$LIBS
1448 AC_SEARCH_LIBS([sqrt], [m])
1449 if test "X$LIBS" = "X$OLD_LIBS"; then
1450   LIB_MATH=
1451 else
1452   LIB_MATH=$ac_cv_search_sqrt
1453 fi
1454 LIBS=$OLD_LIBS
1455
1456 dnl Current possibilities handled by sed (aix4-2 -> aix,
1457 dnl gnu-linux -> gnu/linux, etc.):
1458 dnl gnu, gnu/linux, gnu/kfreebsd, aix, cygwin, darwin, hpux, irix.
1459 dnl And special cases: berkeley-unix, usg-unix-v, ms-dos, windows-nt.
1460 SYSTEM_TYPE=`echo $opsys | sed -e 's/[[0-9]].*//' -e 's|-|/|'`
1461
1462 case $opsys in
1463   cygwin )
1464     LIB_MATH=
1465     ;;
1466   darwin )
1467     ## Adding -lm confuses the dynamic linker, so omit it.
1468     LIB_MATH=
1469     ;;
1470   freebsd | dragonfly )
1471     SYSTEM_TYPE=berkeley-unix
1472     ;;
1473   gnu-linux | gnu-kfreebsd )
1474     ;;
1475   hpux10-20 | hpux11 )
1476     ;;
1477   mingw32 )
1478     LIB_MATH=
1479     SYSTEM_TYPE=windows-nt
1480     ;;
1481   dnl NB this may be adjusted below.
1482   netbsd | openbsd )
1483     SYSTEM_TYPE=berkeley-unix
1484     ;;
1485
1486   sol2* | unixware )
1487     SYSTEM_TYPE=usg-unix-v
1488     ;;
1489
1490 esac
1491
1492 AC_SUBST(LIB_MATH)
1493 AC_DEFINE_UNQUOTED(SYSTEM_TYPE, "$SYSTEM_TYPE",
1494   [The type of system you are compiling for; sets 'system-type'.])
1495
1496
1497 pre_PKG_CONFIG_CFLAGS=$CFLAGS
1498 pre_PKG_CONFIG_LIBS=$LIBS
1499
1500 PKG_PROG_PKG_CONFIG(0.9.0)
1501
1502 dnl EMACS_CHECK_MODULES(GSTUFF, gtk+-2.0 >= 1.3 glib = 1.3.4)
1503 dnl acts like PKG_CHECK_MODULES(GSTUFF, gtk+-2.0 >= 1.3 glib = 1.3.4,
1504 dnl HAVE_GSTUFF=yes, HAVE_GSTUFF=no) -- see pkg-config man page --
1505 dnl except that it postprocesses CFLAGS as needed for --enable-gcc-warnings.
1506 dnl EMACS_CHECK_MODULES accepts optional 3rd and 4th arguments that
1507 dnl can take the place of the default HAVE_GSTUFF=yes and HAVE_GSTUFF=no
1508 dnl actions.
1509 AC_DEFUN([EMACS_CHECK_MODULES],
1510   [PKG_CHECK_MODULES([$1], [$2],
1511      [$1_CFLAGS=`AS_ECHO(["$$1_CFLAGS"]) | sed -e "$edit_cflags"`
1512       m4_default([$3], [HAVE_$1=yes])],
1513      [m4_default([$4], [HAVE_$1=no])])])
1514
1515 HAVE_SOUND=no
1516 if test "${with_sound}" != "no"; then
1517   # Sound support for GNU/Linux, the free BSDs, MinGW, and Cygwin.
1518   AC_CHECK_HEADERS([machine/soundcard.h sys/soundcard.h soundcard.h mmsystem.h],
1519     have_sound_header=yes, [], [
1520     #ifdef __MINGW32__
1521     #define WIN32_LEAN_AND_MEAN
1522     #include <windows.h>
1523     #endif
1524     ])
1525   test "${with_sound}" = "oss" && test "${have_sound_header}" != "yes" && \
1526     AC_MSG_ERROR([OSS sound support requested but not found.])
1527
1528   if test "${with_sound}" = "bsd-ossaudio" || test "${with_sound}" = "yes"; then
1529     # Emulation library used on NetBSD.
1530     AC_CHECK_LIB(ossaudio, _oss_ioctl, LIBSOUND=-lossaudio, LIBSOUND=)
1531     test "${with_sound}" = "bsd-ossaudio" && test -z "$LIBSOUND" && \
1532       AC_MSG_ERROR([bsd-ossaudio sound support requested but not found.])
1533     dnl FIXME?  If we did find ossaudio, should we set with_sound=bsd-ossaudio?
1534     dnl Traditionally, we go on to check for alsa too.  Does that make sense?
1535   fi
1536   AC_SUBST(LIBSOUND)
1537
1538   if test "${with_sound}" = "alsa" || test "${with_sound}" = "yes"; then
1539     ALSA_REQUIRED=1.0.0
1540     ALSA_MODULES="alsa >= $ALSA_REQUIRED"
1541     EMACS_CHECK_MODULES([ALSA], [$ALSA_MODULES])
1542     if test $HAVE_ALSA = yes; then
1543       SAVE_CFLAGS="$CFLAGS"
1544       SAVE_LIBS="$LIBS"
1545       CFLAGS="$ALSA_CFLAGS $CFLAGS"
1546       LIBS="$ALSA_LIBS $LIBS"
1547       AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <asoundlib.h>]], [[snd_lib_error_set_handler (0);]])],
1548                       emacs_alsa_normal=yes,
1549                     emacs_alsa_normal=no)
1550       if test "$emacs_alsa_normal" != yes; then
1551         AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <alsa/asoundlib.h>]],
1552                        [[snd_lib_error_set_handler (0);]])],
1553                        emacs_alsa_subdir=yes,
1554                      emacs_alsa_subdir=no)
1555         if test "$emacs_alsa_subdir" != yes; then
1556           AC_MSG_ERROR([pkg-config found alsa, but it does not compile.  See config.log for error messages.])
1557         fi
1558         ALSA_CFLAGS="$ALSA_CFLAGS -DALSA_SUBDIR_INCLUDE"
1559       fi
1560
1561       CFLAGS="$SAVE_CFLAGS"
1562       LIBS="$SAVE_LIBS"
1563       LIBSOUND="$LIBSOUND $ALSA_LIBS"
1564       CFLAGS_SOUND="$CFLAGS_SOUND $ALSA_CFLAGS"
1565       AC_DEFINE(HAVE_ALSA, 1, [Define to 1 if ALSA is available.])
1566     elif test "${with_sound}" = "alsa"; then
1567       AC_MSG_ERROR([ALSA sound support requested but not found.])
1568     fi
1569   fi                            dnl with_sound = alsa|yes
1570
1571   dnl Define HAVE_SOUND if we have sound support.  We know it works and
1572   dnl compiles only on the specified platforms.  For others, it
1573   dnl probably doesn't make sense to try.
1574   dnl FIXME So surely we should bypass this whole section if not using
1575   dnl one of these platforms?
1576   if test x$have_sound_header = xyes || test $HAVE_ALSA = yes; then
1577      case "$opsys" in
1578        dnl defined __FreeBSD__ || defined __NetBSD__ || defined __linux__
1579        dnl Adjust the --with-sound help text if you change this.
1580        gnu-linux|freebsd|netbsd|mingw32|cygwin)
1581          AC_DEFINE(HAVE_SOUND, 1, [Define to 1 if you have sound support.])
1582          HAVE_SOUND=yes
1583          ;;
1584      esac
1585   fi
1586
1587   AC_SUBST(CFLAGS_SOUND)
1588 fi
1589
1590 dnl checks for header files
1591 AC_CHECK_HEADERS_ONCE(
1592   malloc.h
1593   sys/systeminfo.h
1594   sys/sysinfo.h
1595   coff.h pty.h
1596   sys/resource.h
1597   sys/utsname.h pwd.h utmp.h util.h)
1598
1599 AC_MSG_CHECKING(if personality LINUX32 can be set)
1600 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/personality.h>]], [[personality (PER_LINUX32)]])],
1601                emacs_cv_personality_linux32=yes,
1602                emacs_cv_personality_linux32=no)
1603 AC_MSG_RESULT($emacs_cv_personality_linux32)
1604
1605 if test $emacs_cv_personality_linux32 = yes; then
1606   AC_DEFINE(HAVE_PERSONALITY_LINUX32, 1,
1607             [Define to 1 if personality LINUX32 can be set.])
1608 fi
1609
1610 # Note that Solaris has sys/sysinfo.h which defines struct
1611 # sysinfo as well.  To make sure that we're using GNU/Linux
1612 # sysinfo, we explicitly set one of its fields.
1613 if test "$ac_cv_header_sys_sysinfo_h" = yes; then
1614   AC_MSG_CHECKING([if Linux sysinfo may be used])
1615   AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/sysinfo.h>]],
1616                                      [[struct sysinfo si;
1617                                        si.totalram = 0;
1618                                        sysinfo (&si)]])],
1619     emacs_cv_linux_sysinfo=yes, emacs_cv_linux_sysinfo=no)
1620   AC_MSG_RESULT($emacs_cv_linux_sysinfo)
1621   if test $emacs_cv_linux_sysinfo = yes; then
1622     AC_DEFINE([HAVE_LINUX_SYSINFO], 1, [Define to 1 if you have Linux sysinfo function.])
1623     AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/sysinfo.h>]],
1624                                        [[struct sysinfo si; return si.mem_unit]])],
1625       AC_DEFINE(LINUX_SYSINFO_UNIT, 1,
1626                 [Define to 1 if Linux sysinfo sizes are in multiples of mem_unit bytes.]))
1627   fi
1628 fi
1629
1630 dnl On Solaris 8 there's a compilation warning for term.h because
1631 dnl it doesn't define 'bool'.
1632 AC_CHECK_HEADERS(term.h, , , -)
1633 AC_HEADER_TIME
1634 AC_CHECK_DECLS([sys_siglist], [], [], [[#include <signal.h>
1635                                       ]])
1636 if test $ac_cv_have_decl_sys_siglist != yes; then
1637   # For Tru64, at least:
1638   AC_CHECK_DECLS([__sys_siglist], [], [], [[#include <signal.h>
1639                                           ]])
1640 fi
1641 AC_HEADER_SYS_WAIT
1642
1643 AC_CHECK_HEADERS_ONCE(sys/socket.h)
1644 AC_CHECK_HEADERS(net/if.h, , , [AC_INCLUDES_DEFAULT
1645 #if HAVE_SYS_SOCKET_H
1646 #include <sys/socket.h>
1647 #endif])
1648 AC_CHECK_HEADERS(ifaddrs.h, , , [AC_INCLUDES_DEFAULT
1649 #if HAVE_SYS_SOCKET_H
1650 #include <sys/socket.h>
1651 #endif])
1652 AC_CHECK_HEADERS(net/if_dl.h, , , [AC_INCLUDES_DEFAULT
1653 #if HAVE_SYS_SOCKET_H
1654 #include <sys/socket.h>
1655 #endif])
1656
1657 dnl checks for structure members
1658 AC_CHECK_MEMBERS([struct ifreq.ifr_flags, struct ifreq.ifr_hwaddr,
1659                   struct ifreq.ifr_netmask, struct ifreq.ifr_broadaddr,
1660                   struct ifreq.ifr_addr,
1661                   struct ifreq.ifr_addr.sa_len], , ,
1662                  [AC_INCLUDES_DEFAULT
1663 #if HAVE_SYS_SOCKET_H
1664 #include <sys/socket.h>
1665 #endif
1666 #if HAVE_NET_IF_H
1667 #include <net/if.h>
1668 #endif])
1669
1670 dnl Check for endianness.
1671 dnl AC_C_BIGENDIAN is done by gnulib.
1672
1673 dnl check for Make feature
1674
1675 AUTO_DEPEND=no
1676 dnl check if we have GCC and autodepend is on.
1677 if test "$GCC" = yes && test "$ac_enable_autodepend" = yes; then
1678    AC_MSG_CHECKING([whether gcc understands -MMD -MF])
1679    SAVE_CFLAGS="$CFLAGS"
1680    CFLAGS="$CFLAGS -MMD -MF deps.d -MP"
1681    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])], , ac_enable_autodepend=no)
1682    CFLAGS="$SAVE_CFLAGS"
1683    test -f deps.d || ac_enable_autodepend=no
1684    rm -rf deps.d
1685    AC_MSG_RESULT([$ac_enable_autodepend])
1686    if test $ac_enable_autodepend = yes; then
1687       AUTO_DEPEND=yes
1688    fi
1689 fi
1690 AC_SUBST(AUTO_DEPEND)
1691
1692 dnl checks for operating system services
1693 AC_SYS_LONG_FILE_NAMES
1694
1695 #### Choose a window system.
1696
1697 ## We leave window_system equal to none if
1698 ## we end up building without one.  Any new window system should
1699 ## set window_system to an appropriate value and add objects to
1700 ## window-system-specific substs.
1701
1702 window_system=none
1703 AC_PATH_X
1704 if test "$no_x" != yes; then
1705   window_system=x11
1706 fi
1707
1708 LD_SWITCH_X_SITE_RPATH=
1709 if test "${x_libraries}" != NONE; then
1710   if test -n "${x_libraries}"; then
1711     LD_SWITCH_X_SITE=-L`AS_ECHO(["$x_libraries"]) | sed -e 's/:/ -L/g'`
1712     LD_SWITCH_X_SITE_RPATH=-Wl,-rpath,`
1713       AS_ECHO(["$x_libraries"]) | sed -e 's/:/ -Wl,-rpath,/g'
1714     `
1715   fi
1716   x_default_search_path=""
1717   x_search_path=${x_libraries}
1718   if test -z "${x_search_path}"; then
1719     x_search_path=/usr/lib
1720   fi
1721   for x_library in `AS_ECHO(["$x_search_path:"]) | \
1722                     sed -e "s/:/ /g" -e p -e "s:/lib[[^ /]]* :/share :g"`; do
1723     x_search_path="\
1724 ${x_library}/X11/%L/%T/%N%C%S:\
1725 ${x_library}/X11/%l/%T/%N%C%S:\
1726 ${x_library}/X11/%T/%N%C%S:\
1727 ${x_library}/X11/%L/%T/%N%S:\
1728 ${x_library}/X11/%l/%T/%N%S:\
1729 ${x_library}/X11/%T/%N%S"
1730     if test x"${x_default_search_path}" = x; then
1731       x_default_search_path=${x_search_path}
1732     else
1733       x_default_search_path="${x_search_path}:${x_default_search_path}"
1734     fi
1735   done
1736 fi
1737 AC_SUBST(LD_SWITCH_X_SITE_RPATH)
1738
1739 if test "${x_includes}" != NONE && test -n "${x_includes}"; then
1740   C_SWITCH_X_SITE=$isystem`AS_ECHO(["$x_includes"]) | sed -e "s/:/ $isystem/g"`
1741 fi
1742
1743 if test x"${x_includes}" = x; then
1744   bitmapdir=/usr/include/X11/bitmaps
1745 else
1746   # accumulate include directories that have X11 bitmap subdirectories
1747   bmd_acc=
1748   for bmd in `AS_ECHO(["$x_includes"]) | sed -e 's/:/ /g'`; do
1749     if test -d "${bmd}/X11/bitmaps"; then
1750       bmd_acc="${bmd_acc}:${bmd}/X11/bitmaps"
1751     fi
1752     if test -d "${bmd}/bitmaps"; then
1753       bmd_acc="${bmd_acc}:${bmd}/bitmaps"
1754     fi
1755   done
1756   bitmapdir=${bmd_acc#:}
1757 fi
1758
1759 test "${with_ns}" = maybe && test "${opsys}" != darwin && with_ns=no
1760 HAVE_NS=no
1761 NS_GNUSTEP_CONFIG=no
1762 NS_IMPL_COCOA=no
1763 NS_IMPL_GNUSTEP=no
1764 tmp_CPPFLAGS="$CPPFLAGS"
1765 tmp_CFLAGS="$CFLAGS"
1766 CPPFLAGS="$CPPFLAGS -x objective-c"
1767 CFLAGS="$CFLAGS -x objective-c"
1768 GNU_OBJC_CFLAGS=
1769 LIBS_GNUSTEP=
1770 if test "${with_ns}" != no; then
1771   if test "${opsys}" = darwin; then
1772      NS_IMPL_COCOA=yes
1773      ns_appdir=`pwd`/nextstep/Emacs.app
1774      ns_appbindir=${ns_appdir}/Contents/MacOS
1775      ns_appresdir=${ns_appdir}/Contents/Resources
1776      ns_appsrc=Cocoa/Emacs.base
1777      ns_fontfile=macfont.o
1778   elif flags=$( (gnustep-config --objc-flags) 2>/dev/null); then
1779      NS_IMPL_GNUSTEP=yes
1780      NS_GNUSTEP_CONFIG=yes
1781      GNU_OBJC_CFLAGS=$flags
1782      LIBS_GNUSTEP=$(gnustep-config --gui-libs) || exit
1783   elif test -f $GNUSTEP_CONFIG_FILE; then
1784      NS_IMPL_GNUSTEP=yes
1785      dnl FIXME sourcing this several times in subshells seems inefficient.
1786      GNUSTEP_SYSTEM_HEADERS=$(
1787        . $GNUSTEP_CONFIG_FILE
1788        AS_ECHO(["$GNUSTEP_SYSTEM_HEADERS"])
1789      )
1790      GNUSTEP_SYSTEM_LIBRARIES=$(
1791        . $GNUSTEP_CONFIG_FILE
1792        AS_ECHO(["$GNUSTEP_SYSTEM_LIBRARIES"])
1793      )
1794      dnl I seemed to need these as well with GNUstep-startup 0.25.
1795      GNUSTEP_LOCAL_HEADERS=$(
1796        . $GNUSTEP_CONFIG_FILE
1797        AS_ECHO(["$GNUSTEP_LOCAL_HEADERS"])
1798      )
1799      GNUSTEP_LOCAL_LIBRARIES=$(
1800        . $GNUSTEP_CONFIG_FILE
1801        AS_ECHO(["$GNUSTEP_LOCAL_LIBRARIES"])
1802      )
1803      test "x${GNUSTEP_LOCAL_HEADERS}" != "x" && \
1804        GNUSTEP_LOCAL_HEADERS="-I${GNUSTEP_LOCAL_HEADERS}"
1805      test "x${GNUSTEP_LOCAL_LIBRARIES}" != "x" && \
1806        GNUSTEP_LOCAL_LIBRARIES="-L${GNUSTEP_LOCAL_LIBRARIES}"
1807      CPPFLAGS="$CPPFLAGS -I${GNUSTEP_SYSTEM_HEADERS} ${GNUSTEP_LOCAL_HEADERS}"
1808      CFLAGS="$CFLAGS -I${GNUSTEP_SYSTEM_HEADERS} ${GNUSTEP_LOCAL_HEADERS}"
1809      LDFLAGS="$LDFLAGS -L${GNUSTEP_SYSTEM_LIBRARIES} ${GNUSTEP_LOCAL_LIBRARIES}"
1810      LIBS_GNUSTEP="-lgnustep-gui -lgnustep-base -lobjc -lpthread"
1811      dnl GNUstep defines BASE_NATIVE_OBJC_EXCEPTIONS to 0 or 1.
1812      dnl If they had chosen to either define it or not, we could have
1813      dnl just used AC_CHECK_DECL here.
1814      AC_CACHE_CHECK(if GNUstep defines BASE_NATIVE_OBJC_EXCEPTIONS,
1815        emacs_cv_objc_exceptions,
1816 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <GNUstepBase/GSConfig.h>]],
1817 [[#if defined BASE_NATIVE_OBJC_EXCEPTIONS && BASE_NATIVE_OBJC_EXCEPTIONS > 0
1818 1;
1819 #else
1820 fail;
1821 #endif]])], emacs_cv_objc_exceptions=yes, emacs_cv_objc_exceptions=no ) )
1822      if test $emacs_cv_objc_exceptions = yes; then
1823        dnl _NATIVE_OBJC_EXCEPTIONS is used by the GNUstep headers.
1824        AC_DEFINE(_NATIVE_OBJC_EXCEPTIONS, 1,
1825          [Define if GNUstep uses ObjC exceptions.])
1826        GNU_OBJC_CFLAGS="-fobjc-exceptions"
1827      fi
1828   fi
1829   if test $NS_IMPL_GNUSTEP = yes; then
1830      ns_appdir=`pwd`/nextstep/Emacs.app
1831      ns_appbindir=${ns_appdir}
1832      ns_appresdir=${ns_appdir}/Resources
1833      ns_appsrc=GNUstep/Emacs.base
1834      ns_fontfile=nsfont.o
1835   fi
1836
1837   dnl This is only used while we test the NS headers, it gets reset below.
1838   CPPFLAGS="$CPPFLAGS $GNU_OBJC_CFLAGS"
1839   CFLAGS="$CFLAGS $GNU_OBJC_CFLAGS"
1840
1841   AC_CHECK_HEADER([AppKit/AppKit.h], [HAVE_NS=yes],
1842                   [AC_MSG_ERROR([The include files (AppKit/AppKit.h etc) that
1843 are required for a Nextstep build are missing or cannot be compiled.
1844 Either fix this, or re-configure with the option '--without-ns'.])])
1845
1846   macfont_file=""
1847   if test "${NS_IMPL_COCOA}" = "yes"; then
1848     AC_MSG_CHECKING([for OSX 10.6 or newer])
1849     AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <AppKit/AppKit.h>],
1850                                      [
1851 #ifdef MAC_OS_X_VERSION_MAX_ALLOWED
1852 #if MAC_OS_X_VERSION_MAX_ALLOWED >= 1060
1853  ; /* OK */
1854 #else
1855  error "OSX 10.6 or newer required";
1856 #endif
1857 #endif
1858                     ])],
1859                     ns_osx_have_106=yes,
1860                     ns_osx_have_106=no)
1861     AC_MSG_RESULT([$ns_osx_have_106])
1862
1863     if test $ns_osx_have_106 = no; then
1864        AC_MSG_ERROR([OSX 10.6 or newer is required]);
1865     fi
1866   fi
1867 fi
1868
1869 AC_SUBST(LIBS_GNUSTEP)
1870
1871 INSTALL_ARCH_INDEP_EXTRA=install-etc
1872 ns_self_contained=no
1873 NS_OBJ=
1874 NS_OBJC_OBJ=
1875 if test "${HAVE_NS}" = yes; then
1876   if test "$with_toolkit_scroll_bars" = "no"; then
1877     AC_MSG_ERROR([Non-toolkit scroll bars are not implemented for Nextstep.])
1878   fi
1879
1880   window_system=nextstep
1881   # set up packaging dirs
1882   if test "${EN_NS_SELF_CONTAINED}" = yes; then
1883      ns_self_contained=yes
1884      prefix=${ns_appresdir}
1885      exec_prefix=${ns_appbindir}
1886      dnl This one isn't really used, only archlibdir is.
1887      libexecdir="\${ns_appbindir}/libexec"
1888      archlibdir="\${ns_appbindir}/libexec"
1889      etcdocdir="\${ns_appresdir}/etc"
1890      etcdir="\${ns_appresdir}/etc"
1891      dnl FIXME maybe set datarootdir instead.
1892      dnl That would also get applications, icons, man.
1893      infodir="\${ns_appresdir}/info"
1894      mandir="\${ns_appresdir}/man"
1895      lispdir="\${ns_appresdir}/lisp"
1896      test "$locallisppathset" = no && locallisppath=""
1897      INSTALL_ARCH_INDEP_EXTRA=
1898   fi
1899
1900   NS_OBJC_OBJ="nsterm.o nsfns.o nsmenu.o nsselect.o nsimage.o $ns_fontfile"
1901 fi
1902 CFLAGS="$tmp_CFLAGS"
1903 CPPFLAGS="$tmp_CPPFLAGS"
1904 AC_SUBST(INSTALL_ARCH_INDEP_EXTRA)
1905 AC_SUBST(ns_self_contained)
1906 AC_SUBST(NS_OBJ)
1907 AC_SUBST(NS_OBJC_OBJ)
1908
1909 HAVE_W32=no
1910 W32_OBJ=
1911 W32_LIBS=
1912 EMACSRES=
1913 CLIENTRES=
1914 CLIENTW=
1915 W32_RES_LINK=
1916 EMACS_MANIFEST=
1917 UPDATE_MANIFEST=
1918 if test "${with_w32}" != no; then
1919   case "${opsys}" in
1920     cygwin)
1921       AC_CHECK_HEADER([windows.h], [HAVE_W32=yes],
1922              [AC_MSG_ERROR(['--with-w32' was specified, but windows.h
1923                    cannot be found.])])
1924     ;;
1925     mingw32)
1926     ## Using --with-w32 with MinGW is a no-op, but we allow it.
1927     ;;
1928     *)
1929       AC_MSG_ERROR([Using w32 with an autotools build is only supported for Cygwin and MinGW32.])
1930     ;;
1931   esac
1932 fi
1933
1934 if test "${opsys}" = "mingw32"; then
1935   AC_MSG_CHECKING([whether Windows API headers are recent enough])
1936   AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1937      #include <windows.h>
1938      #include <usp10.h>]],
1939    [[PIMAGE_NT_HEADERS pHeader;
1940      PIMAGE_SECTION_HEADER pSection = IMAGE_FIRST_SECTION(pHeader)]])],
1941    [emacs_cv_w32api=yes
1942     HAVE_W32=yes],
1943    emacs_cv_w32api=no)
1944   AC_MSG_RESULT($emacs_cv_w32api)
1945   if test "${emacs_cv_w32api}" = "no"; then
1946     AC_MSG_ERROR([the Windows API headers are too old to support this build.])
1947   fi
1948 fi
1949
1950 FIRSTFILE_OBJ=
1951 NTDIR=
1952 LIBS_ECLIENT=
1953 LIB_WSOCK32=
1954 NTLIB=
1955 CM_OBJ="cm.o"
1956 XARGS_LIMIT=
1957 if test "${HAVE_W32}" = "yes"; then
1958   AC_DEFINE(HAVE_NTGUI, 1, [Define to use native MS Windows GUI.])
1959   if test "$with_toolkit_scroll_bars" = "no"; then
1960     AC_MSG_ERROR([Non-toolkit scroll bars are not implemented for w32 build.])
1961   fi
1962   AC_CHECK_TOOL(WINDRES, [windres],
1963                 [AC_MSG_ERROR([No resource compiler found.])])
1964   W32_OBJ="w32fns.o w32menu.o w32reg.o w32font.o w32term.o"
1965   W32_OBJ="$W32_OBJ w32xfns.o w32select.o w32uniscribe.o"
1966   EMACSRES="emacs.res"
1967   case "$canonical" in
1968     x86_64-*-*) EMACS_MANIFEST="emacs-x64.manifest" ;;
1969     *) EMACS_MANIFEST="emacs-x86.manifest" ;;
1970   esac
1971   dnl Construct something of the form "24,4,0,0" with 4 components.
1972   comma_version=`echo "${PACKAGE_VERSION}.0.0" | sed -e 's/\./,/g' -e 's/^\([[^,]]*,[[^,]]*,[[^,]]*,[[^,]]*\).*/\1/'`
1973
1974   comma_space_version=`echo "$comma_version" | sed 's/,/, /g'`
1975   AC_SUBST(comma_version)
1976   AC_SUBST(comma_space_version)
1977   AC_CONFIG_FILES([nt/emacs.rc nt/emacsclient.rc])
1978   if test "${opsys}" = "cygwin"; then
1979     W32_LIBS="$W32_LIBS -lkernel32 -luser32 -lgdi32 -lole32 -lcomdlg32"
1980     W32_LIBS="$W32_LIBS -lusp10 -lcomctl32 -lwinspool"
1981     # Tell the linker that emacs.res is an object (which we compile from
1982     # the rc file), not a linker script.
1983     W32_RES_LINK="-Wl,emacs.res"
1984   else
1985     UPDATE_MANIFEST=update-game-score.exe.manifest
1986     W32_OBJ="$W32_OBJ w32.o w32console.o w32heap.o w32inevt.o w32proc.o"
1987     W32_LIBS="$W32_LIBS -lwinmm -lgdi32 -lcomdlg32"
1988     W32_LIBS="$W32_LIBS -lmpr -lwinspool -lole32 -lcomctl32 -lusp10"
1989     W32_RES_LINK="\$(EMACSRES)"
1990     CLIENTRES="emacsclient.res"
1991     CLIENTW="emacsclientw\$(EXEEXT)"
1992     FIRSTFILE_OBJ=firstfile.o
1993     NTDIR=nt
1994     CM_OBJ=
1995     LIBS_ECLIENT="-lcomctl32"
1996     LIB_WSOCK32="-lwsock32"
1997     NTLIB="ntlib.$ac_objext"
1998     XARGS_LIMIT="-s 10000"
1999   fi
2000 fi
2001 AC_SUBST(W32_OBJ)
2002 AC_SUBST(W32_LIBS)
2003 AC_SUBST(EMACSRES)
2004 AC_SUBST(EMACS_MANIFEST)
2005 AC_SUBST(UPDATE_MANIFEST)
2006 AC_SUBST(CLIENTRES)
2007 AC_SUBST(CLIENTW)
2008 AC_SUBST(W32_RES_LINK)
2009 AC_SUBST(FIRSTFILE_OBJ)
2010 AC_SUBST(NTDIR)
2011 AC_SUBST(CM_OBJ)
2012 AC_SUBST(LIBS_ECLIENT)
2013 AC_SUBST(LIB_WSOCK32)
2014 AC_SUBST(NTLIB)
2015 AC_SUBST(XARGS_LIMIT)
2016
2017 if test "${HAVE_W32}" = "yes"; then
2018   window_system=w32
2019   with_xft=no
2020 fi
2021
2022 ## $window_system is now set to the window system we will
2023 ## ultimately use.
2024
2025 if test "$window_system" = none && test "$gl_gcc_warnings" = yes; then
2026    # Too many warnings for now.
2027    nw=
2028    nw="$nw -Wsuggest-attribute=noreturn"
2029    gl_MANYWARN_COMPLEMENT([WARN_CFLAGS], [$WARN_CFLAGS], [$nw])
2030
2031    gl_WARN_ADD([-Wno-unused-variable])
2032    gl_WARN_ADD([-Wno-unused-but-set-variable])
2033    gl_WARN_ADD([-Wno-unused-but-set-parameter])
2034 fi
2035
2036 term_header=
2037 HAVE_X_WINDOWS=no
2038 HAVE_X11=no
2039 USE_X_TOOLKIT=none
2040
2041 case "${window_system}" in
2042   x11 )
2043     HAVE_X_WINDOWS=yes
2044     HAVE_X11=yes
2045     term_header=xterm.h
2046     case "${with_x_toolkit}" in
2047       athena | lucid ) USE_X_TOOLKIT=LUCID ;;
2048       motif ) USE_X_TOOLKIT=MOTIF ;;
2049       gtk ) with_gtk=yes
2050             term_header=gtkutil.h
2051 dnl Don't set this for GTK.  A lot of tests below assumes Xt when
2052 dnl USE_X_TOOLKIT is set.
2053             USE_X_TOOLKIT=none ;;
2054       gtk2 ) with_gtk2=yes
2055              term_header=gtkutil.h
2056              USE_X_TOOLKIT=none ;;
2057       gtk3 ) with_gtk3=yes
2058              term_header=gtkutil.h
2059              USE_X_TOOLKIT=none ;;
2060       no ) USE_X_TOOLKIT=none ;;
2061 dnl If user did not say whether to use a toolkit, make this decision later:
2062 dnl use the toolkit if we have gtk, or X11R5 or newer.
2063       * ) USE_X_TOOLKIT=maybe ;;
2064     esac
2065   ;;
2066   nextstep )
2067     term_header=nsterm.h
2068   ;;
2069   w32 )
2070     term_header=w32term.h
2071   ;;
2072 esac
2073
2074 if test "$window_system" = none && test "X$with_x" != "Xno"; then
2075    AC_CHECK_PROG(HAVE_XSERVER, X, true, false)
2076    if test "$HAVE_XSERVER" = true ||
2077       test -n "$DISPLAY" ||
2078       {
2079         for emacs_libX11 in /usr/lib/libX11.*; do break; done
2080         test "$emacs_libX11" != '/usr/lib/libX11.*'
2081       }
2082    then
2083         AC_MSG_ERROR([You seem to be running X, but no X development libraries
2084 were found.  You should install the relevant development files for X
2085 and for the toolkit you want, such as Gtk+ or Motif.  Also make
2086 sure you have development files for image handling, i.e.
2087 tiff, gif, jpeg, png and xpm.
2088 If you are sure you want Emacs compiled without X window support, pass
2089   --without-x
2090 to configure.])
2091    fi
2092 fi
2093
2094 # Does the opsystem file prohibit the use of the GNU malloc?
2095 # Assume not, until told otherwise.
2096 GNU_MALLOC=yes
2097
2098 AC_CACHE_CHECK(
2099   [whether malloc is Doug Lea style],
2100   [emacs_cv_var_doug_lea_malloc],
2101   [emacs_cv_var_doug_lea_malloc=no
2102    dnl Hooks do not work with address sanitization.
2103    if test "$emacs_cv_sanitize_address" != yes; then
2104      AC_LINK_IFELSE(
2105        [AC_LANG_PROGRAM(
2106           [[#include <malloc.h>
2107             static void hook (void) {}]],
2108           [[malloc_set_state (malloc_get_state ());
2109             __after_morecore_hook = hook;
2110             __malloc_initialize_hook = hook;]])],
2111        [emacs_cv_var_doug_lea_malloc=yes])
2112    fi])
2113 doug_lea_malloc=$emacs_cv_var_doug_lea_malloc
2114
2115 system_malloc=$emacs_cv_sanitize_address
2116
2117 hybrid_malloc=
2118
2119 case "$opsys" in
2120   ## darwin ld insists on the use of malloc routines in the System framework.
2121   darwin | mingw32 | nacl | sol2-10) system_malloc=yes ;;
2122   cygwin) hybrid_malloc=yes;;
2123 esac
2124
2125 if test "${system_malloc}" != yes && test "${doug_lea_malloc}" != yes \
2126    && test "${UNEXEC_OBJ}" = unexelf.o; then
2127   hybrid_malloc=yes
2128 fi
2129
2130 GMALLOC_OBJ=
2131 HYBRID_MALLOC=
2132 if test "${system_malloc}" = "yes"; then
2133   AC_DEFINE([SYSTEM_MALLOC], 1,
2134     [Define to 1 to use the system memory allocator, even if it is not
2135      Doug Lea style.])
2136   GNU_MALLOC=no
2137   GNU_MALLOC_reason="
2138     (The GNU allocators don't work with this system configuration.)"
2139   VMLIMIT_OBJ=
2140 elif test "$hybrid_malloc" = yes; then
2141   AC_DEFINE(HYBRID_MALLOC, 1,
2142     [Define to use gmalloc before dumping and the system malloc after.])
2143   HYBRID_MALLOC=1
2144   GNU_MALLOC=
2145   GNU_MALLOC_reason="only before dumping"
2146   GMALLOC_OBJ=gmalloc.o
2147   VMLIMIT_OBJ=
2148 else
2149   test "$doug_lea_malloc" != "yes" && GMALLOC_OBJ=gmalloc.o
2150   VMLIMIT_OBJ=vm-limit.o
2151
2152   AC_CHECK_HEADERS([sys/vlimit.h])
2153   AC_CACHE_CHECK([for data_start], [emacs_cv_data_start],
2154     [AC_LINK_IFELSE(
2155        [AC_LANG_PROGRAM(
2156          [[extern char data_start[]; char ch;]],
2157          [[return data_start < &ch;]])],
2158        [emacs_cv_data_start=yes],
2159        [emacs_cv_data_start=no])])
2160   if test $emacs_cv_data_start = yes; then
2161     AC_DEFINE([HAVE_DATA_START], 1,
2162       [Define to 1 if data_start is the address of the start
2163        of the main data segment.])
2164   fi
2165 fi
2166 AC_SUBST([HYBRID_MALLOC])
2167 AM_CONDITIONAL([HYBRID_MALLOC_LIB], [test -n "$HYBRID_MALLOC"])
2168 AC_SUBST(GMALLOC_OBJ)
2169 AC_SUBST(VMLIMIT_OBJ)
2170
2171 if test "$doug_lea_malloc" = "yes" && test "$hybrid_malloc" != yes; then
2172   if test "$GNU_MALLOC" = yes ; then
2173     GNU_MALLOC_reason="
2174       (Using Doug Lea's new malloc from the GNU C Library.)"
2175   fi
2176   AC_DEFINE(DOUG_LEA_MALLOC, 1,
2177     [Define to 1 if the system memory allocator is Doug Lea style,
2178      with malloc hooks and malloc_set_state.])
2179
2180   ## Use mmap directly for allocating larger buffers.
2181   ## FIXME this comes from src/s/{gnu,gnu-linux}.h:
2182   ## #ifdef DOUG_LEA_MALLOC; #undef REL_ALLOC; #endif
2183   ## Does the AC_FUNC_MMAP test below make this check unnecessary?
2184   case "$opsys" in
2185     mingw32|gnu*) REL_ALLOC=no ;;
2186   esac
2187 fi
2188
2189 if test x"${REL_ALLOC}" = x; then
2190   REL_ALLOC=${GNU_MALLOC}
2191 fi
2192
2193 use_mmap_for_buffers=no
2194 case "$opsys" in
2195   cygwin|mingw32|irix6-5) use_mmap_for_buffers=yes ;;
2196 esac
2197
2198 AC_FUNC_MMAP
2199 if test $use_mmap_for_buffers = yes; then
2200   AC_DEFINE(USE_MMAP_FOR_BUFFERS, 1, [Define to use mmap to allocate buffer text.])
2201   REL_ALLOC=no
2202 fi
2203
2204 LIBS="$LIBS_SYSTEM $LIBS"
2205
2206 dnl FIXME replace main with a function we actually want from this library.
2207 AC_CHECK_LIB(Xbsd, main, LD_SWITCH_X_SITE="$LD_SWITCH_X_SITE -lXbsd")
2208
2209 dnl Check for the POSIX thread library.
2210 LIB_PTHREAD=
2211 AC_CHECK_HEADERS_ONCE(pthread.h)
2212 if test "$ac_cv_header_pthread_h" && test "$opsys" != "mingw32"; then
2213   AC_CACHE_CHECK([for pthread library],
2214     [emacs_cv_pthread_lib],
2215     [emacs_cv_pthread_lib=no
2216      OLD_LIBS=$LIBS
2217      for emacs_pthread_lib in 'none needed' -lpthread; do
2218        case $emacs_pthread_lib in
2219          -*) LIBS="$OLD_LIBS $emacs_pthread_lib";;
2220        esac
2221        AC_LINK_IFELSE(
2222          [AC_LANG_PROGRAM(
2223             [[#include <pthread.h>
2224               #include <signal.h>
2225               sigset_t old_mask, new_mask;
2226               void noop (void) {}]],
2227             [[pthread_t th = pthread_self ();
2228               int status = 0;
2229               status += pthread_create (&th, 0, 0, 0);
2230               status += pthread_sigmask (SIG_BLOCK, &new_mask, &old_mask);
2231               status += pthread_kill (th, 0);
2232               #if ! (defined SYSTEM_MALLOC || defined HYBRID_MALLOC \
2233                      || defined DOUG_LEA_MALLOC)
2234               /* Test for pthread_atfork only if gmalloc uses it,
2235                  as older-style hosts like MirBSD 10 lack it.  */
2236               status += pthread_atfork (noop, noop, noop);
2237               #endif
2238               return status;]])],
2239          [emacs_cv_pthread_lib=$emacs_pthread_lib])
2240        LIBS=$OLD_LIBS
2241        if test "$emacs_cv_pthread_lib" != no; then
2242          break
2243        fi
2244      done])
2245   if test "$emacs_cv_pthread_lib" != no; then
2246     AC_DEFINE([HAVE_PTHREAD], 1, [Define to 1 if you have POSIX threads.])
2247     case $emacs_cv_pthread_lib in
2248       -*) LIB_PTHREAD=$emacs_cv_pthread_lib;;
2249     esac
2250     ac_cv_func_pthread_sigmask=yes
2251     # Some systems optimize for single-threaded programs by default, and
2252     # need special flags to disable these optimizations. For example, the
2253     # definition of 'errno' in <errno.h>.
2254     case $opsys in
2255       hpux* | sol*)
2256         AC_DEFINE([_REENTRANT], 1,
2257           [Define to 1 if your system requires this in multithreaded code.]);;
2258       aix4-2)
2259         AC_DEFINE([_THREAD_SAFE], 1,
2260           [Define to 1 if your system requires this in multithreaded code.]);;
2261     esac
2262   fi
2263 fi
2264 AC_SUBST([LIB_PTHREAD])
2265
2266 dnl Check for need for bigtoc support on IBM AIX
2267
2268 case ${host_os} in
2269 aix*)
2270   AC_CACHE_CHECK([for -bbigtoc option], [gdb_cv_bigtoc], [
2271     case $GCC in
2272     yes) gdb_cv_bigtoc=-Wl,-bbigtoc ;;
2273     *) gdb_cv_bigtoc=-bbigtoc ;;
2274     esac
2275
2276     LDFLAGS=$LDFLAGS\ $gdb_cv_bigtoc
2277     AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[int i;]])], [], [gdb_cv_bigtoc=])
2278   ])
2279   ;;
2280 esac
2281
2282 # Change CFLAGS, CPPFLAGS, and LIBS temporarily so that C_SWITCH_X_SITE
2283 # is for the tests that follow.  We set them back later on.
2284
2285 REAL_CFLAGS="$CFLAGS"
2286 REAL_CPPFLAGS="$CPPFLAGS"
2287 REAL_LIBS="$LIBS"
2288
2289 if test "${HAVE_X11}" = "yes"; then
2290   DEFS="$C_SWITCH_X_SITE $DEFS"
2291   LDFLAGS="$LDFLAGS $LD_SWITCH_X_SITE"
2292   LIBS="-lX11 $LIBS"
2293   CFLAGS="$C_SWITCH_X_SITE $CFLAGS"
2294   CPPFLAGS="$C_SWITCH_X_SITE $CPPFLAGS"
2295
2296   # On Solaris, arrange for LD_RUN_PATH to point to the X libraries for tests.
2297   # This is handled by LD_SWITCH_X_SITE_RPATH during the real build,
2298   # but it's more convenient here to set LD_RUN_PATH since this
2299   # also works on hosts that don't understand LD_SWITCH_X_SITE_RPATH.
2300   if test "${x_libraries}" != NONE && test -n "${x_libraries}"; then
2301     LD_RUN_PATH=$x_libraries${LD_RUN_PATH+:}$LD_RUN_PATH
2302     export LD_RUN_PATH
2303   fi
2304
2305   if test "${opsys}" = "gnu-linux"; then
2306     AC_MSG_CHECKING(whether X on GNU/Linux needs -b to link)
2307     AC_LINK_IFELSE([AC_LANG_PROGRAM([[]],
2308      [[XOpenDisplay ("foo");]])],
2309      [xgnu_linux_first_failure=no],
2310      [xgnu_linux_first_failure=yes])
2311     if test "${xgnu_linux_first_failure}" = "yes"; then
2312       OLD_CPPFLAGS="$CPPFLAGS"
2313       OLD_LIBS="$LIBS"
2314       CPPFLAGS="$CPPFLAGS -b i486-linuxaout"
2315       LIBS="$LIBS -b i486-linuxaout"
2316       AC_LINK_IFELSE([AC_LANG_PROGRAM([[]],
2317        [[XOpenDisplay ("foo");]])],
2318        [xgnu_linux_second_failure=no],
2319        [xgnu_linux_second_failure=yes])
2320       if test "${xgnu_linux_second_failure}" = "yes"; then
2321         # If we get the same failure with -b, there is no use adding -b.
2322         # So leave it out.  This plays safe.
2323         AC_MSG_RESULT(no)
2324       else
2325         LD_SWITCH_X_SITE="$LD_SWITCH_X_SITE -b i486-linuxaout"
2326         C_SWITCH_X_SITE="$C_SWITCH_X_SITE -b i486-linuxaout"
2327         AC_MSG_RESULT(yes)
2328       fi
2329       CPPFLAGS=$OLD_CPPFLAGS
2330       LIBS=$OLD_LIBS
2331     else
2332       AC_MSG_RESULT(no)
2333     fi
2334   fi
2335
2336   # Reportedly, some broken Solaris systems have XKBlib.h but are missing
2337   # header files included from there.
2338   AC_MSG_CHECKING(for Xkb)
2339   AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <X11/Xlib.h>
2340 #include <X11/XKBlib.h>]],
2341         [[XkbDescPtr kb = XkbGetKeyboard (0, XkbAllComponentsMask, XkbUseCoreKbd);]])],
2342         emacs_xkb=yes, emacs_xkb=no)
2343   AC_MSG_RESULT($emacs_xkb)
2344   if test $emacs_xkb = yes; then
2345     AC_DEFINE(HAVE_XKB, 1, [Define to 1 if you have the Xkb extension.])
2346   fi
2347
2348   AC_CHECK_FUNCS(XrmSetDatabase XScreenResourceString \
2349 XScreenNumberOfScreen)
2350 fi
2351
2352 if test "${window_system}" = "x11"; then
2353   AC_MSG_CHECKING(X11 version 6)
2354   AC_CACHE_VAL(emacs_cv_x11_version_6,
2355   [AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <X11/Xlib.h>]],
2356 [[#if XlibSpecificationRelease < 6
2357 fail;
2358 #endif
2359 ]])], emacs_cv_x11_version_6=yes, emacs_cv_x11_version_6=no)])
2360   if test $emacs_cv_x11_version_6 = yes; then
2361     AC_MSG_RESULT(6 or newer)
2362     AC_DEFINE(HAVE_X11R6, 1,
2363               [Define to 1 if you have the X11R6 or newer version of Xlib.])
2364     AC_DEFINE(HAVE_X_I18N, 1, [Define if you have usable i18n support.])
2365     ## inoue@ainet.or.jp says Solaris has a bug related to X11R6-style
2366     ## XIM support.
2367     case "$opsys" in
2368       sol2-*) : ;;
2369       *) AC_DEFINE(HAVE_X11R6_XIM, 1,
2370            [Define if you have usable X11R6-style XIM support.])
2371          ;;
2372     esac
2373   else
2374     AC_MSG_RESULT(before 6)
2375   fi
2376 fi
2377
2378
2379 ### Use -lrsvg-2 if available, unless '--with-rsvg=no' is specified.
2380 HAVE_RSVG=no
2381 if test "${HAVE_X11}" = "yes" || test "${HAVE_NS}" = "yes" || test "${opsys}" = "mingw32"; then
2382   if test "${with_rsvg}" != "no"; then
2383     RSVG_REQUIRED=2.11.0
2384     RSVG_MODULE="librsvg-2.0 >= $RSVG_REQUIRED"
2385
2386     EMACS_CHECK_MODULES([RSVG], [$RSVG_MODULE])
2387     AC_SUBST(RSVG_CFLAGS)
2388     AC_SUBST(RSVG_LIBS)
2389
2390     if test $HAVE_RSVG = yes; then
2391       AC_DEFINE(HAVE_RSVG, 1, [Define to 1 if using librsvg.])
2392       CFLAGS="$CFLAGS $RSVG_CFLAGS"
2393       # Windows loads librsvg dynamically
2394       if test "${opsys}" = "mingw32"; then
2395         RSVG_LIBS=
2396       fi
2397     fi
2398   fi
2399 fi
2400
2401 HAVE_IMAGEMAGICK=no
2402 if test "${HAVE_X11}" = "yes" || test "${HAVE_NS}" = "yes" || test "${HAVE_W32}" = "yes"; then
2403   if test "${with_imagemagick}" != "no"; then
2404     ## 6.3.5 is the earliest version known to work; see Bug#17339.
2405     ## 6.8.2 makes Emacs crash; see Bug#13867.
2406     IMAGEMAGICK_MODULE="Wand >= 6.3.5 Wand != 6.8.2"
2407     EMACS_CHECK_MODULES([IMAGEMAGICK], [$IMAGEMAGICK_MODULE])
2408     AC_SUBST(IMAGEMAGICK_CFLAGS)
2409     AC_SUBST(IMAGEMAGICK_LIBS)
2410
2411     if test $HAVE_IMAGEMAGICK = yes; then
2412       AC_DEFINE(HAVE_IMAGEMAGICK, 1, [Define to 1 if using imagemagick.])
2413       OLD_CFLAGS=$CFLAGS
2414       OLD_LIBS=$LIBS
2415       CFLAGS="$CFLAGS $IMAGEMAGICK_CFLAGS"
2416       LIBS="$IMAGEMAGICK_LIBS $LIBS"
2417       AC_CHECK_FUNCS(MagickExportImagePixels MagickMergeImageLayers MagickAutoOrientImage)
2418       CFLAGS=$OLD_CFLAGS
2419       LIBS=$OLD_LIBS
2420     fi
2421   fi
2422 fi
2423
2424 AC_CHECK_LIB(anl, getaddrinfo_a, HAVE_GETADDRINFO_A=yes)
2425 if test "${HAVE_GETADDRINFO_A}" = "yes"; then
2426   AC_DEFINE(HAVE_GETADDRINFO_A, 1,
2427 [Define to 1 if you have getaddrinfo_a for asynchronous DNS resolution.])
2428   GETADDRINFO_A_LIBS="-lanl"
2429   AC_SUBST(GETADDRINFO_A_LIBS)
2430 fi
2431
2432 HAVE_GTK=no
2433 GTK_OBJ=
2434 gtk_term_header=$term_header
2435 check_gtk2=no
2436 gtk3_pkg_errors=
2437 if test "${opsys}" != "mingw32"; then
2438   if test "${with_gtk3}" = "yes" || test "${with_gtk}" = "yes" || test "$USE_X_TOOLKIT" = "maybe"; then
2439     GLIB_REQUIRED=2.28
2440     GTK_REQUIRED=3.0
2441     GTK_MODULES="gtk+-3.0 >= $GTK_REQUIRED glib-2.0 >= $GLIB_REQUIRED"
2442
2443     dnl Checks for libraries.
2444     EMACS_CHECK_MODULES([GTK], [$GTK_MODULES],
2445       [pkg_check_gtk=yes], [pkg_check_gtk=no])
2446     if test "$pkg_check_gtk" = "no" && test "$with_gtk3" = "yes"; then
2447        AC_MSG_ERROR($GTK_PKG_ERRORS)
2448     fi
2449     if test "$pkg_check_gtk" = "yes"; then
2450        AC_DEFINE(HAVE_GTK3, 1, [Define to 1 if using GTK 3 or later.])
2451        GTK_OBJ=emacsgtkfixed.o
2452        gtk_term_header=gtkutil.h
2453        USE_GTK_TOOLKIT="GTK3"
2454        if test "x$ac_enable_gtk_deprecation_warnings" = x; then
2455          AC_DEFINE([GDK_DISABLE_DEPRECATION_WARNINGS], [1],
2456            [Define to 1 to disable GTK+/GDK deprecation warnings.])
2457          AC_DEFINE([GLIB_DISABLE_DEPRECATION_WARNINGS], [1],
2458            [Define to 1 to disable Glib deprecation warnings.])
2459        fi
2460     else
2461        check_gtk2=yes
2462        gtk3_pkg_errors="$GTK_PKG_ERRORS "
2463     fi
2464   fi
2465
2466   if test "${with_gtk2}" = "yes" || test "$check_gtk2" = "yes"; then
2467     GLIB_REQUIRED=2.10
2468     GTK_REQUIRED=2.10
2469     GTK_MODULES="gtk+-2.0 >= $GTK_REQUIRED glib-2.0 >= $GLIB_REQUIRED"
2470
2471     dnl Checks for libraries.
2472     EMACS_CHECK_MODULES([GTK], [$GTK_MODULES],
2473       [pkg_check_gtk=yes], [pkg_check_gtk=no])
2474     if test "$pkg_check_gtk" = "no" &&
2475        { test "$with_gtk" = yes || test "$with_gtk2" = "yes"; }
2476     then
2477       AC_MSG_ERROR($gtk3_pkg_errors$GTK_PKG_ERRORS)
2478     fi
2479     test "$pkg_check_gtk" = "yes" && USE_GTK_TOOLKIT="GTK2"
2480   fi
2481 fi
2482
2483 OLD_CFLAGS=$CFLAGS
2484 OLD_LIBS=$LIBS
2485
2486 if test x"$pkg_check_gtk" = xyes; then
2487
2488   AC_SUBST(GTK_LIBS)
2489   CFLAGS="$CFLAGS $GTK_CFLAGS"
2490   LIBS="$GTK_LIBS $LIBS"
2491   dnl Try to compile a simple GTK program.
2492   AC_MSG_CHECKING([whether GTK compiles])
2493   GTK_COMPILES=no
2494   AC_LINK_IFELSE(
2495     [AC_LANG_PROGRAM(
2496        [[/* Check the Gtk and Glib APIs.  */
2497          #include <gtk/gtk.h>
2498          #include <glib-object.h>
2499          static void
2500          callback (GObject *go, GParamSpec *spec, gpointer user_data)
2501          {}
2502        ]],
2503        [[
2504          GtkSettings *gs = 0;
2505          /* Use G_CALLBACK to make sure function pointers can be cast to void *;
2506             strict C prohibits this.  Use gtk_main_iteration to test that the
2507             libraries are there.  */
2508          if (g_signal_handler_find (G_OBJECT (gs), G_SIGNAL_MATCH_FUNC,
2509                                     0, 0, 0, G_CALLBACK (callback), 0))
2510            gtk_main_iteration ();
2511        ]])],
2512     [GTK_COMPILES=yes])
2513   AC_MSG_RESULT([$GTK_COMPILES])
2514   if test "${GTK_COMPILES}" != "yes"; then
2515     GTK_OBJ=
2516     if test "$USE_X_TOOLKIT" != "maybe"; then
2517       AC_MSG_ERROR([Gtk+ wanted, but it does not compile, see config.log.  Maybe some x11-devel files missing?]);
2518     fi
2519   else
2520     C_SWITCH_X_SITE="$C_SWITCH_X_SITE $GTK_CFLAGS"
2521     HAVE_GTK=yes
2522     AC_DEFINE(USE_GTK, 1, [Define to 1 if using GTK.])
2523     GTK_OBJ="gtkutil.o $GTK_OBJ"
2524     term_header=$gtk_term_header
2525     USE_X_TOOLKIT=none
2526     AC_MSG_WARN([[Your version of Gtk+ will have problems with
2527        closing open displays.  This is no problem if you just use
2528        one display, but if you use more than one and close one of them
2529        Emacs may crash.
2530        See http://bugzilla.gnome.org/show_bug.cgi?id=85715]])
2531     sleep 3
2532   fi
2533
2534 fi
2535 AC_SUBST(GTK_OBJ)
2536
2537
2538 if test "${HAVE_GTK}" = "yes"; then
2539
2540   dnl  GTK scrollbars resemble toolkit scrollbars a lot, so to avoid
2541   dnl  a lot if #ifdef:s, say we have toolkit scrollbars.
2542   if test "$with_toolkit_scroll_bars" != no; then
2543     with_toolkit_scroll_bars=yes
2544   fi
2545
2546   dnl  Check if we have the old file selection dialog declared and
2547   dnl  in the link library.  In 2.x it may be in the library,
2548   dnl  but not declared if deprecated featured has been selected out.
2549   dnl  AC_CHECK_DECL checks for a macro, so check for GTK_TYPE_FILE_SELECTION.
2550   HAVE_GTK_FILE_SELECTION=no
2551   AC_CHECK_DECL(GTK_TYPE_FILE_SELECTION, HAVE_GTK_FILE_SELECTION=yes,
2552                    HAVE_GTK_FILE_SELECTION=no, [AC_INCLUDES_DEFAULT
2553 #include <gtk/gtk.h>])
2554   if test "$HAVE_GTK_FILE_SELECTION" = yes; then
2555     AC_CHECK_FUNCS(gtk_file_selection_new)
2556   fi
2557
2558   dnl Same as above for gtk_handle_box.
2559   HAVE_GTK_HANDLE_BOX=no
2560   AC_CHECK_DECL(GTK_TYPE_HANDLE_BOX, HAVE_GTK_HANDLE_BOX=yes,
2561                    HAVE_GTK_HANDLE_BOX=no, [AC_INCLUDES_DEFAULT
2562 #include <gtk/gtk.h>])
2563   if test "$HAVE_GTK_HANDLE_BOX" = yes; then
2564     AC_CHECK_FUNCS(gtk_handle_box_new)
2565   fi
2566
2567   dnl Same as above for gtk_tearoff_menu_item.
2568   HAVE_GTK_TEAROFF_MENU_ITEM=no
2569   AC_CHECK_DECL(GTK_TYPE_TEAROFF_MENU_ITEM, HAVE_GTK_TEAROFF_MENU_ITEM=yes,
2570                    HAVE_GTK_TEAROFF_MENU_ITEM=no, [AC_INCLUDES_DEFAULT
2571 #include <gtk/gtk.h>])
2572   if test "$HAVE_GTK_TEAROFF_MENU_ITEM" = yes; then
2573     AC_CHECK_FUNCS(gtk_tearoff_menu_item_new)
2574   fi
2575
2576   dnl Check for functions introduced in 2.14 and later.
2577   AC_CHECK_FUNCS(gtk_widget_get_window gtk_widget_set_has_window \
2578                  gtk_dialog_get_action_area gtk_widget_get_sensitive \
2579                  gtk_widget_get_mapped gtk_adjustment_get_page_size \
2580                  gtk_orientable_set_orientation \
2581                  gtk_window_set_has_resize_grip)
2582
2583  term_header=gtkutil.h
2584 fi
2585
2586
2587 dnl Enable xwidgets if GTK3 and WebKitGTK+ are available.
2588 HAVE_XWIDGETS=no
2589 XWIDGETS_OBJ=
2590 if test "$with_xwidgets" != "no"; then
2591   test "$USE_GTK_TOOLKIT" = "GTK3" && test "$window_system" != "none" ||
2592     AC_MSG_ERROR([xwidgets requested but gtk3 not used.])
2593
2594   WEBKIT_REQUIRED=1.4.0
2595   WEBKIT_MODULES="webkitgtk-3.0 >= $WEBKIT_REQUIRED"
2596   EMACS_CHECK_MODULES([WEBKIT], [$WEBKIT_MODULES])
2597   HAVE_XWIDGETS=$HAVE_WEBKIT
2598   test $HAVE_XWIDGETS = yes ||
2599     AC_MSG_ERROR([xwidgets requested but WebKitGTK+ not found.])
2600
2601   XWIDGETS_OBJ=xwidget.o
2602   AC_DEFINE([HAVE_XWIDGETS], 1, [Define to 1 if you have xwidgets support.])
2603 fi
2604 AC_SUBST(XWIDGETS_OBJ)
2605
2606 CFLAGS=$OLD_CFLAGS
2607 LIBS=$OLD_LIBS
2608
2609 dnl D-Bus has been tested under GNU/Linux only.  Must be adapted for
2610 dnl other platforms.
2611 HAVE_DBUS=no
2612 DBUS_OBJ=
2613 if test "${with_dbus}" = "yes"; then
2614    EMACS_CHECK_MODULES([DBUS], [dbus-1 >= 1.0])
2615    if test "$HAVE_DBUS" = yes; then
2616      AC_DEFINE(HAVE_DBUS, 1, [Define to 1 if using D-Bus.])
2617      dnl dbus_watch_get_unix_fd has been introduced in D-Bus 1.1.1.
2618      dnl dbus_type_is_valid and dbus_validate_* have been introduced in
2619      dnl D-Bus 1.5.12.
2620      OLD_LIBS=$LIBS
2621      LIBS="$LIBS $DBUS_LIBS"
2622      AC_CHECK_FUNCS(dbus_watch_get_unix_fd \
2623                     dbus_type_is_valid \
2624                     dbus_validate_bus_name \
2625                     dbus_validate_path \
2626                     dbus_validate_interface \
2627                     dbus_validate_member)
2628      LIBS=$OLD_LIBS
2629      DBUS_OBJ=dbusbind.o
2630    fi
2631 fi
2632 AC_SUBST(DBUS_CFLAGS)
2633 AC_SUBST(DBUS_LIBS)
2634 AC_SUBST(DBUS_OBJ)
2635
2636 dnl GSettings has been tested under GNU/Linux only.
2637 HAVE_GSETTINGS=no
2638 if test "${HAVE_X11}" = "yes" && test "${with_gsettings}" = "yes"; then
2639    EMACS_CHECK_MODULES([GSETTINGS], [gio-2.0 >= 2.26])
2640    if test "$HAVE_GSETTINGS" = "yes"; then
2641       old_CFLAGS=$CFLAGS
2642       CFLAGS="$CFLAGS $GSETTINGS_CFLAGS"
2643       old_LIBS=$LIBS
2644       LIBS="$LIBS $GSETTINGS_LIBS"
2645       AC_MSG_CHECKING([whether GSettings is in gio])
2646       AC_LINK_IFELSE(
2647          [AC_LANG_PROGRAM(
2648              [[/* Check that gsettings really is present.  */
2649              #include <glib-object.h>
2650              #include <gio/gio.h>
2651              ]],
2652              [[
2653                GSettings *settings;
2654                GVariant *val = g_settings_get_value (settings, "");
2655              ]])],
2656          [], HAVE_GSETTINGS=no)
2657       AC_MSG_RESULT([$HAVE_GSETTINGS])
2658
2659       if test "$HAVE_GSETTINGS" = "yes"; then
2660         AC_DEFINE(HAVE_GSETTINGS, 1, [Define to 1 if using GSettings.])
2661         SETTINGS_CFLAGS="$GSETTINGS_CFLAGS"
2662         SETTINGS_LIBS="$GSETTINGS_LIBS"
2663       fi
2664       CFLAGS=$old_CFLAGS
2665       LIBS=$old_LIBS
2666    fi
2667 fi
2668
2669 dnl GConf has been tested under GNU/Linux only.
2670 dnl The version is really arbitrary, it is about the same age as Gtk+ 2.6.
2671 HAVE_GCONF=no
2672 if test "${HAVE_X11}" = "yes" && test "${with_gconf}" = "yes"; then
2673    EMACS_CHECK_MODULES([GCONF], [gconf-2.0 >= 2.13])
2674    if test "$HAVE_GCONF" = yes; then
2675       AC_DEFINE(HAVE_GCONF, 1, [Define to 1 if using GConf.])
2676       dnl Newer GConf doesn't link with g_objects, so this is not defined.
2677       SETTINGS_CFLAGS="$SETTINGS_CFLAGS $GCONF_CFLAGS"
2678       SETTINGS_LIBS="$SETTINGS_LIBS $GCONF_LIBS"
2679    fi
2680 fi
2681
2682 if test "$HAVE_GSETTINGS" = "yes" || test "$HAVE_GCONF" = "yes"; then
2683     EMACS_CHECK_MODULES([GOBJECT], [gobject-2.0 >= 2.0])
2684     if test "$HAVE_GOBJECT" = "yes"; then
2685        SETTINGS_CFLAGS="$SETTINGS_CFLAGS $GOBJECT_CFLAGS"
2686        SETTINGS_LIBS="$SETTINGS_LIBS $GOBJECT_LIBS"
2687     fi
2688     SAVE_CFLAGS="$CFLAGS"
2689     SAVE_LIBS="$LIBS"
2690     CFLAGS="$SETTINGS_CFLAGS $CFLAGS"
2691     LIBS="$SETTINGS_LIBS $LIBS"
2692     CFLAGS="$SAVE_CFLAGS"
2693     LIBS="$SAVE_LIBS"
2694 fi
2695 AC_SUBST(SETTINGS_CFLAGS)
2696 AC_SUBST(SETTINGS_LIBS)
2697
2698
2699 dnl SELinux is available for GNU/Linux only.
2700 HAVE_LIBSELINUX=no
2701 LIBSELINUX_LIBS=
2702 if test "${with_selinux}" = "yes"; then
2703    AC_CHECK_LIB([selinux], [lgetfilecon], HAVE_LIBSELINUX=yes, HAVE_LIBSELINUX=no)
2704    if test "$HAVE_LIBSELINUX" = yes; then
2705       AC_DEFINE(HAVE_LIBSELINUX, 1, [Define to 1 if using SELinux.])
2706       LIBSELINUX_LIBS=-lselinux
2707    fi
2708 fi
2709 AC_SUBST(LIBSELINUX_LIBS)
2710
2711 HAVE_GNUTLS=no
2712 if test "${with_gnutls}" = "yes" ; then
2713   EMACS_CHECK_MODULES([LIBGNUTLS], [gnutls >= 2.6.6],
2714     [HAVE_GNUTLS=yes], [HAVE_GNUTLS=no])
2715   if test "${HAVE_GNUTLS}" = "yes"; then
2716     AC_DEFINE(HAVE_GNUTLS, 1, [Define if using GnuTLS.])
2717     EMACS_CHECK_MODULES([LIBGNUTLS3], [gnutls >= 3.0.0],
2718       [AC_DEFINE(HAVE_GNUTLS3, 1, [Define if using GnuTLS v3.])], [])
2719   fi
2720
2721   # Windows loads GnuTLS dynamically
2722   if test "${opsys}" = "mingw32"; then
2723     LIBGNUTLS_LIBS=
2724   fi
2725 fi
2726
2727 AC_SUBST(LIBGNUTLS_LIBS)
2728 AC_SUBST(LIBGNUTLS_CFLAGS)
2729
2730 NOTIFY_OBJ=
2731 NOTIFY_SUMMARY=no
2732
2733 dnl MS Windows native file monitor is available for mingw32 only.
2734 case $with_file_notification,$opsys in
2735   w32,cygwin)
2736     AC_MSG_ERROR(['--with-file-notification=w32' was specified, but
2737     this is only supported on MS-Windows native and MinGW32 builds.
2738     Consider using gfile instead.])
2739     ;;
2740   w32,* | yes,mingw32)
2741     AC_CHECK_HEADER(windows.h)
2742     if test "$ac_cv_header_windows_h" = yes ; then
2743        AC_DEFINE(HAVE_W32NOTIFY, 1, [Define to 1 to use w32notify.])
2744        NOTIFY_OBJ=w32notify.o
2745        NOTIFY_SUMMARY="yes (w32)"
2746     fi ;;
2747 esac
2748
2749 dnl inotify is available only on GNU/Linux.
2750 case $with_file_notification,$NOTIFY_OBJ in
2751   inotify, | yes,)
2752     AC_CHECK_HEADER(sys/inotify.h)
2753     if test "$ac_cv_header_sys_inotify_h" = yes ; then
2754         AC_CHECK_FUNC(inotify_init1)
2755         if test "$ac_cv_func_inotify_init1" = yes; then
2756           AC_DEFINE(HAVE_INOTIFY, 1, [Define to 1 to use inotify.])
2757           NOTIFY_OBJ=inotify.o
2758           NOTIFY_SUMMARY="yes -lglibc (inotify)"
2759        fi
2760     fi ;;
2761 esac
2762
2763 dnl kqueue is available on BSD-like systems.
2764 case $with_file_notification,$NOTIFY_OBJ in
2765   kqueue,* | yes,)
2766     EMACS_CHECK_MODULES([KQUEUE], [libkqueue])
2767     if test "$HAVE_KQUEUE" = "yes"; then
2768        AC_DEFINE(HAVE_KQUEUE, 1, [Define to 1 to use kqueue.])
2769        CPPFLAGS="$CPPFLAGS -I/usr/include/kqueue"
2770        NOTIFY_CFLAGS=$KQUEUE_CFLAGS
2771        NOTIFY_LIBS=$KQUEUE_LIBS
2772        NOTIFY_OBJ=kqueue.o
2773        NOTIFY_SUMMARY="yes -lkqueue"
2774     else
2775        AC_SEARCH_LIBS(kqueue, [])
2776        if test "$ac_cv_search_kqueue" != no; then
2777          AC_DEFINE(HAVE_KQUEUE, 1, [Define to 1 to use kqueue.])
2778          NOTIFY_OBJ=kqueue.o
2779          NOTIFY_SUMMARY="yes (kqueue)"
2780        fi
2781     fi ;;
2782 esac
2783
2784 dnl g_file_monitor exists since glib 2.18.  G_FILE_MONITOR_EVENT_MOVED
2785 dnl has been added in glib 2.24.  It has been tested under
2786 dnl GNU/Linux only.
2787 case $with_file_notification,$NOTIFY_OBJ in
2788   gfile,* | yes,)
2789     if test "${HAVE_NS}" = yes; then
2790        AC_MSG_ERROR(['--with-file-notification=gfile' is not supported in NextStep builds.
2791 Consider kqueue instead.])
2792     else
2793        EMACS_CHECK_MODULES([GFILENOTIFY], [gio-2.0 >= 2.24])
2794        if test "$HAVE_GFILENOTIFY" = "yes"; then
2795           AC_DEFINE(HAVE_GFILENOTIFY, 1, [Define to 1 if using GFile.])
2796           NOTIFY_CFLAGS=$GFILENOTIFY_CFLAGS
2797           NOTIFY_LIBS=$GFILENOTIFY_LIBS
2798           NOTIFY_OBJ=gfilenotify.o
2799           NOTIFY_SUMMARY="yes -lgio (gfile)"
2800        fi
2801     fi ;;
2802 esac
2803
2804 case $with_file_notification,$NOTIFY_OBJ in
2805   yes,* | no,* | *,?*) ;;
2806   *) AC_MSG_ERROR([File notification '$with_file_notification' requested but requirements not found.]) ;;
2807 esac
2808
2809 if test -n "$NOTIFY_OBJ"; then
2810    AC_DEFINE(USE_FILE_NOTIFY, 1, [Define to 1 if using file notifications.])
2811 fi
2812 AC_SUBST(NOTIFY_CFLAGS)
2813 AC_SUBST(NOTIFY_LIBS)
2814 AC_SUBST(NOTIFY_OBJ)
2815
2816 dnl Do not put whitespace before the #include statements below.
2817 dnl Older compilers (eg sunos4 cc) choke on it.
2818 HAVE_XAW3D=no
2819 LUCID_LIBW=
2820 if test x"${USE_X_TOOLKIT}" = xmaybe || test x"${USE_X_TOOLKIT}" = xLUCID; then
2821   if test "$with_xaw3d" != no; then
2822     AC_CACHE_VAL(emacs_cv_xaw3d,
2823     [AC_LINK_IFELSE([AC_LANG_PROGRAM([[
2824 #include <X11/Intrinsic.h>
2825 #include <X11/Xaw3d/Simple.h>]],
2826       [[]])],
2827       [AC_CHECK_LIB(Xaw3d, XawScrollbarSetThumb,
2828                     emacs_cv_xaw3d=yes, emacs_cv_xaw3d=no)],
2829       emacs_cv_xaw3d=no)])
2830   else
2831     emacs_cv_xaw3d=no
2832   fi
2833   if test $emacs_cv_xaw3d = yes; then
2834     AC_MSG_CHECKING(for xaw3d)
2835     AC_MSG_RESULT([yes; using Lucid toolkit])
2836     USE_X_TOOLKIT=LUCID
2837     HAVE_XAW3D=yes
2838     LUCID_LIBW=-lXaw3d
2839     AC_DEFINE(HAVE_XAW3D, 1,
2840               [Define to 1 if you have the Xaw3d library (-lXaw3d).])
2841   else
2842     AC_MSG_CHECKING(for xaw3d)
2843     AC_MSG_RESULT(no)
2844     AC_MSG_CHECKING(for libXaw)
2845     AC_CACHE_VAL(emacs_cv_xaw,
2846     [AC_LINK_IFELSE([AC_LANG_PROGRAM([[
2847 #include <X11/Intrinsic.h>
2848 #include <X11/Xaw/Simple.h>]],
2849       [[]])],
2850       emacs_cv_xaw=yes,
2851       emacs_cv_xaw=no)])
2852     if test $emacs_cv_xaw = yes; then
2853       AC_MSG_RESULT([yes; using Lucid toolkit])
2854       USE_X_TOOLKIT=LUCID
2855       LUCID_LIBW=-lXaw
2856     elif test x"${USE_X_TOOLKIT}" = xLUCID; then
2857       AC_MSG_ERROR([Lucid toolkit requires X11/Xaw include files])
2858     else
2859       AC_MSG_ERROR([No X toolkit could be found.
2860 If you are sure you want Emacs compiled without an X toolkit, pass
2861   --with-x-toolkit=no
2862 to configure.  Otherwise, install the development libraries for the toolkit
2863 that you want to use (e.g. Gtk+) and re-run configure.])
2864     fi
2865   fi
2866 fi
2867
2868 X_TOOLKIT_TYPE=$USE_X_TOOLKIT
2869
2870 LIBXTR6=
2871 LIBXMU=
2872 if test "${USE_X_TOOLKIT}" != "none"; then
2873   AC_MSG_CHECKING(X11 toolkit version)
2874   AC_CACHE_VAL(emacs_cv_x11_toolkit_version_6,
2875   [AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <X11/Intrinsic.h>]],
2876 [[#if XtSpecificationRelease < 6
2877 fail;
2878 #endif
2879 ]])], emacs_cv_x11_toolkit_version_6=yes, emacs_cv_x11_toolkit_version_6=no)])
2880   HAVE_X11XTR6=$emacs_cv_x11_toolkit_version_6
2881   if test $emacs_cv_x11_toolkit_version_6 = yes; then
2882     AC_MSG_RESULT(6 or newer)
2883     AC_DEFINE(HAVE_X11XTR6, 1,
2884               [Define to 1 if you have the X11R6 or newer version of Xt.])
2885     LIBXTR6="-lSM -lICE"
2886     case "$opsys" in
2887       ## Use libw.a along with X11R6 Xt.
2888       unixware) LIBXTR6="$LIBXTR6 -lw" ;;
2889     esac
2890   else
2891     AC_MSG_RESULT(before 6)
2892   fi
2893
2894 dnl If using toolkit, check whether libXmu.a exists.
2895 dnl tranle@intellicorp.com says libXmu.a can need XtMalloc in libXt.a to link.
2896   OLDLIBS="$LIBS"
2897   if test x$HAVE_X11XTR6 = xyes; then
2898     OTHERLIBS='-lXt -lSM -lICE'
2899   else
2900     OTHERLIBS='-lXt'
2901   fi
2902   AC_SEARCH_LIBS([XmuConvertStandardSelection], [Xmu], [], [], [$OTHERLIBS])
2903   if test "X$LIBS" != "X$OLDLIBS"; then
2904     LIBXMU=$ac_cv_search_XmuConvertStandardSelection
2905   fi
2906   LIBS=$OLDLIBS
2907   dnl ac_cv_search_XmuConvertStandardSelection is also referenced below.
2908 fi
2909 AC_SUBST(LIBXTR6)
2910 AC_SUBST(LIBXMU)
2911
2912 LIBXP=
2913 if test "${USE_X_TOOLKIT}" = "MOTIF"; then
2914   # OpenMotif may be installed in such a way on some GNU/Linux systems.
2915   if test -d /usr/include/openmotif; then
2916     CPPFLAGS="-I/usr/include/openmotif $CPPFLAGS"
2917     emacs_cv_openmotif=yes
2918     case "$canonical" in
2919       x86_64-*-linux-gnu* | powerpc64-*-linux-gnu* | sparc64-*-linux-gnu*)
2920       test -d /usr/lib64/openmotif && LDFLAGS="-L/usr/lib64/openmotif $LDFLAGS"
2921       ;;
2922       *)
2923       test -d /usr/lib/openmotif && LDFLAGS="-L/usr/lib/openmotif $LDFLAGS"
2924     esac
2925   else
2926     emacs_cv_openmotif=no
2927   fi
2928   AC_CACHE_CHECK(for (Open)Motif version 2.1, emacs_cv_motif_version_2_1,
2929   [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <Xm/Xm.h>]],
2930     [[#if XmVERSION > 2 || (XmVERSION == 2 && XmREVISION >= 1)
2931 int x = 5;
2932 #else
2933 Motif version prior to 2.1.
2934 #endif]])],
2935     emacs_cv_motif_version_2_1=yes, emacs_cv_motif_version_2_1=no)])
2936   if test $emacs_cv_motif_version_2_1 = yes; then
2937     AC_CHECK_LIB(Xp, XpCreateContext, LIBXP=-lXp)
2938     if test x$emacs_cv_openmotif = xyes; then
2939       REAL_CPPFLAGS="-I/usr/include/openmotif $REAL_CPPFLAGS"
2940     fi
2941   else
2942     AC_CACHE_CHECK(for LessTif where some systems put it, emacs_cv_lesstif,
2943     # We put this in CFLAGS temporarily to precede other -I options
2944     # that might be in CFLAGS temporarily.
2945     # We put this in CPPFLAGS where it precedes the other -I options.
2946     OLD_CPPFLAGS=$CPPFLAGS
2947     OLD_CFLAGS=$CFLAGS
2948     CPPFLAGS="-I/usr/X11R6/LessTif/Motif1.2/include $CPPFLAGS"
2949     CFLAGS="-I/usr/X11R6/LessTif/Motif1.2/include $CFLAGS"
2950     [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include </usr/X11R6/LessTif/Motif1.2/include/Xm/Xm.h>]],
2951       [[int x = 5;]])],
2952       emacs_cv_lesstif=yes, emacs_cv_lesstif=no)])
2953     if test $emacs_cv_lesstif = yes; then
2954       # Make sure this -I option remains in CPPFLAGS after it is set
2955       # back to REAL_CPPFLAGS.
2956       # There is no need to change REAL_CFLAGS, because REAL_CFLAGS does not
2957       # have those other -I options anyway.  Ultimately, having this
2958       # directory ultimately in CPPFLAGS will be enough.
2959       REAL_CPPFLAGS="-I/usr/X11R6/LessTif/Motif1.2/include $REAL_CPPFLAGS"
2960       LDFLAGS="-L/usr/X11R6/LessTif/Motif1.2/lib $LDFLAGS"
2961     else
2962       CFLAGS=$OLD_CFLAGS
2963       CPPFLAGS=$OLD_CPPFLAGS
2964     fi
2965   fi
2966   AC_CHECK_HEADER([Xm/BulletinB.h], [],
2967     [AC_MSG_ERROR([Motif toolkit requested but requirements not found.])])
2968 fi
2969
2970 dnl Use toolkit scroll bars if configured for GTK or X toolkit and either
2971 dnl using Motif or Xaw3d is available, and unless
2972 dnl --with-toolkit-scroll-bars=no was specified.
2973
2974 AH_TEMPLATE(USE_TOOLKIT_SCROLL_BARS,
2975             [Define to 1 if we should use toolkit scroll bars.])dnl
2976 USE_TOOLKIT_SCROLL_BARS=no
2977 if test "${with_toolkit_scroll_bars}" != "no"; then
2978   if test "${USE_X_TOOLKIT}" != "none"; then
2979     if test "${USE_X_TOOLKIT}" = "MOTIF"; then
2980       AC_DEFINE(USE_TOOLKIT_SCROLL_BARS)
2981       HAVE_XAW3D=no
2982       USE_TOOLKIT_SCROLL_BARS=yes
2983     elif test "${HAVE_XAW3D}" = "yes" || test "${USE_X_TOOLKIT}" = "LUCID"; then
2984       AC_DEFINE(USE_TOOLKIT_SCROLL_BARS)
2985       USE_TOOLKIT_SCROLL_BARS=yes
2986     fi
2987   elif test "${HAVE_GTK}" = "yes"; then
2988     AC_DEFINE(USE_TOOLKIT_SCROLL_BARS)
2989     USE_TOOLKIT_SCROLL_BARS=yes
2990   elif test "${HAVE_NS}" = "yes"; then
2991     AC_DEFINE(USE_TOOLKIT_SCROLL_BARS)
2992     USE_TOOLKIT_SCROLL_BARS=yes
2993   elif test "${HAVE_W32}" = "yes"; then
2994     AC_DEFINE(USE_TOOLKIT_SCROLL_BARS)
2995     USE_TOOLKIT_SCROLL_BARS=yes
2996   fi
2997 fi
2998
2999 dnl See if XIM is available.
3000 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
3001           #include <X11/Xlib.h>
3002           #include <X11/Xresource.h>]],
3003          [[XIMProc  callback;]])],
3004          [HAVE_XIM=yes
3005          AC_DEFINE(HAVE_XIM, 1, [Define to 1 if XIM is available])],
3006          HAVE_XIM=no)
3007
3008 dnl '--with-xim' now controls only the initial value of use_xim at run time.
3009
3010 if test "${with_xim}" != "no"; then
3011   AC_DEFINE(USE_XIM, 1,
3012             [Define to 1 if we should use XIM, if it is available.])
3013 fi
3014
3015
3016 if test "${HAVE_XIM}" != "no"; then
3017   late_CFLAGS=$CFLAGS
3018   if test "$GCC" = yes; then
3019     CFLAGS="$CFLAGS --pedantic-errors"
3020   fi
3021   AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
3022 #include <X11/Xlib.h>
3023 #include <X11/Xresource.h>]],
3024 [[Display *display;
3025 XrmDatabase db;
3026 char *res_name;
3027 char *res_class;
3028 XIMProc  callback;
3029 XPointer *client_data;
3030 #ifndef __GNUC__
3031 /* If we're not using GCC, it's probably not XFree86, and this is
3032    probably right, but we can't use something like --pedantic-errors.  */
3033 extern Bool XRegisterIMInstantiateCallback(Display*, XrmDatabase, char*,
3034                                            char*, XIMProc, XPointer*);
3035 #endif
3036 (void)XRegisterIMInstantiateCallback(display, db, res_name, res_class, callback,
3037    client_data);]])],
3038     [emacs_cv_arg6_star=yes])
3039   AH_TEMPLATE(XRegisterIMInstantiateCallback_arg6,
3040          [Define to the type of the 6th arg of XRegisterIMInstantiateCallback,
3041 either XPointer or XPointer*.])dnl
3042   if test "$emacs_cv_arg6_star" = yes; then
3043     AC_DEFINE(XRegisterIMInstantiateCallback_arg6, [XPointer*])
3044   else
3045     AC_DEFINE(XRegisterIMInstantiateCallback_arg6, [XPointer])
3046   fi
3047   CFLAGS=$late_CFLAGS
3048 fi
3049
3050 ### Start of font-backend (under any platform) section.
3051 # (nothing here yet -- this is a placeholder)
3052 ### End of font-backend (under any platform) section.
3053
3054 ### Start of font-backend (under X11) section.
3055 if test "${HAVE_X11}" = "yes"; then
3056     ## Use -lXft if available, unless '--with-xft=no'.
3057     HAVE_XFT=maybe
3058     if test "x${with_x}" = "xno"; then
3059       with_xft="no";
3060     fi
3061
3062     if test "$with_xft" != no; then
3063       EMACS_CHECK_MODULES([FONTCONFIG], [fontconfig >= 2.2.0])
3064       with_xft=$HAVE_FONTCONFIG
3065     fi
3066
3067     if test "x${with_xft}" != "xno"; then
3068
3069       EMACS_CHECK_MODULES([XFT], [xft >= 0.13.0], [], [HAVE_XFT=no])
3070       ## Because xftfont.c uses XRenderQueryExtension, we also
3071       ## need to link to -lXrender.
3072       HAVE_XRENDER=no
3073       AC_CHECK_LIB(Xrender, XRenderQueryExtension, HAVE_XRENDER=yes)
3074       if test "$HAVE_XFT" != no && test "$HAVE_XRENDER" != no; then
3075         OLD_CPPFLAGS="$CPPFLAGS"
3076         OLD_CFLAGS="$CFLAGS"
3077         OLD_LIBS="$LIBS"
3078         CPPFLAGS="$CPPFLAGS $XFT_CFLAGS"
3079         CFLAGS="$CFLAGS $XFT_CFLAGS"
3080         XFT_LIBS="-lXrender $XFT_LIBS"
3081         LIBS="$XFT_LIBS $LIBS"
3082         AC_CHECK_HEADER(X11/Xft/Xft.h,
3083           AC_CHECK_LIB(Xft, XftFontOpen, HAVE_XFT=yes, , $XFT_LIBS) , ,
3084           [[#include <X11/X.h>]])
3085
3086         if test "${HAVE_XFT}" = "yes"; then
3087           AC_DEFINE(HAVE_XFT, 1, [Define to 1 if you have the Xft library.])
3088             AC_SUBST(XFT_LIBS)
3089           C_SWITCH_X_SITE="$C_SWITCH_X_SITE $XFT_CFLAGS"
3090         fi                        # "${HAVE_XFT}" = "yes"
3091         CPPFLAGS=$OLD_CPPFLAGS
3092         CFLAGS=$OLD_CFLAGS
3093         LIBS=$OLD_LIBS
3094       fi                          # "$HAVE_XFT" != no
3095     fi                            # "x${with_xft}" != "xno"
3096
3097     ## We used to allow building with FreeType and without Xft.
3098     ## However, the ftx font backend driver is not in good shape.
3099     if test "$HAVE_XFT" != "yes"; then
3100        dnl For the "Does Emacs use" message at the end.
3101        HAVE_XFT=no
3102        HAVE_FREETYPE=no
3103     else
3104        dnl Strict linkers fail with
3105        dnl ftfont.o: undefined reference to symbol 'FT_New_Face'
3106        dnl if -lfreetype is not specified.
3107        dnl The following is needed to set FREETYPE_LIBS.
3108        EMACS_CHECK_MODULES([FREETYPE], [freetype2])
3109
3110        test "$HAVE_FREETYPE" = "no" && AC_MSG_ERROR(libxft requires libfreetype)
3111     fi
3112
3113     HAVE_LIBOTF=no
3114     if test "${HAVE_FREETYPE}" = "yes"; then
3115       AC_DEFINE(HAVE_FREETYPE, 1,
3116                 [Define to 1 if using the freetype and fontconfig libraries.])
3117       if test "${with_libotf}" != "no"; then
3118         EMACS_CHECK_MODULES([LIBOTF], [libotf])
3119         if test "$HAVE_LIBOTF" = "yes"; then
3120           AC_DEFINE(HAVE_LIBOTF, 1, [Define to 1 if using libotf.])
3121           AC_CHECK_LIB(otf, OTF_get_variation_glyphs,
3122                        HAVE_OTF_GET_VARIATION_GLYPHS=yes,
3123                        HAVE_OTF_GET_VARIATION_GLYPHS=no)
3124           if test "${HAVE_OTF_GET_VARIATION_GLYPHS}" = "yes"; then
3125             AC_DEFINE(HAVE_OTF_GET_VARIATION_GLYPHS, 1,
3126                       [Define to 1 if libotf has OTF_get_variation_glyphs.])
3127           fi
3128         fi
3129       fi
3130     dnl FIXME should there be an error if HAVE_FREETYPE != yes?
3131     dnl Does the new font backend require it, or can it work without it?
3132     fi
3133
3134     HAVE_M17N_FLT=no
3135     if test "${HAVE_LIBOTF}" = yes; then
3136       if test "${with_m17n_flt}" != "no"; then
3137         EMACS_CHECK_MODULES([M17N_FLT], [m17n-flt])
3138         if test "$HAVE_M17N_FLT" = "yes"; then
3139           AC_DEFINE(HAVE_M17N_FLT, 1, [Define to 1 if using libm17n-flt.])
3140         fi
3141       fi
3142     fi
3143 else
3144     HAVE_XFT=no
3145     HAVE_FREETYPE=no
3146     HAVE_LIBOTF=no
3147     HAVE_M17N_FLT=no
3148 fi
3149
3150 ### End of font-backend (under X11) section.
3151
3152 AC_SUBST(FREETYPE_CFLAGS)
3153 AC_SUBST(FREETYPE_LIBS)
3154 AC_SUBST(FONTCONFIG_CFLAGS)
3155 AC_SUBST(FONTCONFIG_LIBS)
3156 AC_SUBST(LIBOTF_CFLAGS)
3157 AC_SUBST(LIBOTF_LIBS)
3158 AC_SUBST(M17N_FLT_CFLAGS)
3159 AC_SUBST(M17N_FLT_LIBS)
3160
3161 HAVE_CAIRO=no
3162 if test "${HAVE_X11}" = "yes"; then
3163   if test "${with_cairo}" != "no"; then
3164     CAIRO_REQUIRED=1.12.0
3165     CAIRO_MODULE="cairo >= $CAIRO_REQUIRED"
3166     EMACS_CHECK_MODULES(CAIRO, $CAIRO_MODULE)
3167     if test $HAVE_CAIRO = yes; then
3168       AC_DEFINE(USE_CAIRO, 1, [Define to 1 if using cairo.])
3169     else
3170       AC_MSG_ERROR([cairo requested but not found.])
3171     fi
3172
3173     CFLAGS="$CFLAGS $CAIRO_CFLAGS"
3174     LIBS="$LIBS $CAIRO_LIBS"
3175     AC_SUBST(CAIRO_CFLAGS)
3176     AC_SUBST(CAIRO_LIBS)
3177   fi
3178 fi
3179
3180 if test "${HAVE_X11}" = "yes"; then
3181   AC_CHECK_HEADER(X11/Xlib-xcb.h,
3182     AC_CHECK_LIB(xcb, xcb_translate_coordinates, HAVE_XCB=yes))
3183   if test "${HAVE_XCB}" = "yes"; then
3184     AC_CHECK_LIB(X11-xcb, XGetXCBConnection, HAVE_X11_XCB=yes)
3185     if test "${HAVE_X11_XCB}" = "yes"; then
3186       AC_DEFINE(USE_XCB, 1,
3187 [Define to 1 if you have the XCB library and X11-XCB library for mixed
3188    X11/XCB programming.])
3189       XCB_LIBS="-lX11-xcb -lxcb"
3190       AC_SUBST(XCB_LIBS)
3191     fi
3192   fi
3193 fi
3194
3195 ### Use -lXpm if available, unless '--with-xpm=no'.
3196 ### mingw32 doesn't use -lXpm, since it loads the library dynamically.
3197 ### In the Cygwin-w32 build, we need to use /usr/include/noX/X11/xpm.h
3198 ### rather than /usr/include/X11/xpm.h, so we set CPPFLAGS (and
3199 ### LDFLAGS) accordingly.
3200 HAVE_XPM=no
3201 LIBXPM=
3202 if test "${HAVE_W32}" = "yes" && test "${opsys}" = "cygwin"; then
3203   if test "${with_xpm}" != "no"; then
3204     SAVE_CPPFLAGS="$CPPFLAGS"
3205     SAVE_LDFLAGS="$LDFLAGS"
3206     CPPFLAGS="$CPPFLAGS -I/usr/include/noX"
3207     LDFLAGS="$LDFLAGS -L/usr/lib/noX"
3208     AC_CHECK_HEADER(X11/xpm.h,
3209       [AC_CHECK_LIB(Xpm, XpmReadFileToImage, HAVE_XPM=yes)])
3210     if test "${HAVE_XPM}" = "yes"; then
3211       AC_MSG_CHECKING(for XpmReturnAllocPixels preprocessor define)
3212       AC_EGREP_CPP(no_return_alloc_pixels,
3213       [#include "X11/xpm.h"
3214 #ifndef XpmReturnAllocPixels
3215 no_return_alloc_pixels
3216 #endif
3217       ], HAVE_XPM=no, HAVE_XPM=yes)
3218
3219       if test "${HAVE_XPM}" = "yes"; then
3220         REAL_CPPFLAGS="$REAL_CPPFLAGS -I/usr/include/noX"
3221         AC_MSG_RESULT(yes)
3222       else
3223         AC_MSG_RESULT(no)
3224         CPPFLAGS="$SAVE_CPPFLAGS"
3225         LDFLAGS="$SAVE_LDFLAGS"
3226       fi
3227     fi
3228   fi
3229
3230   if test "${HAVE_XPM}" = "yes"; then
3231     AC_DEFINE(HAVE_XPM, 1, [Define to 1 if you have the Xpm library (-lXpm).])
3232     LIBXPM=-lXpm
3233   fi
3234 fi
3235
3236 if test "${HAVE_X11}" = "yes"; then
3237   dnl Avoid Xpm on AIX unless requested, as it crashes; see Bug#17598.
3238   test "$opsys$with_xpm_set" = aix4-2 && with_xpm=no
3239
3240   if test "${with_xpm}" != "no"; then
3241     AC_CHECK_HEADER(X11/xpm.h,
3242       [AC_CHECK_LIB(Xpm, XpmReadFileToPixmap, HAVE_XPM=yes, , -lX11)])
3243     if test "${HAVE_XPM}" = "yes"; then
3244       AC_MSG_CHECKING(for XpmReturnAllocPixels preprocessor define)
3245       AC_EGREP_CPP(no_return_alloc_pixels,
3246       [#include "X11/xpm.h"
3247 #ifndef XpmReturnAllocPixels
3248 no_return_alloc_pixels
3249 #endif
3250       ], HAVE_XPM=no, HAVE_XPM=yes)
3251
3252       if test "${HAVE_XPM}" = "yes"; then
3253         AC_MSG_RESULT(yes)
3254       else
3255         AC_MSG_RESULT(no)
3256       fi
3257     fi
3258   fi
3259
3260   if test "${HAVE_XPM}" = "yes"; then
3261     AC_DEFINE(HAVE_XPM, 1, [Define to 1 if you have the Xpm library (-lXpm).])
3262     LIBXPM=-lXpm
3263   elif test "$opsys,$LUCID_LIBW" = aix4-2,-lXaw; then
3264     dnl AIX -lXaw needs -lXpm linked too; see Bug#17598 Message#152.
3265     LIBXPM=-lXpm
3266   fi
3267 fi
3268
3269 ### FIXME: Perhaps regroup to minimize code duplication due to MinGW's
3270 ### slightly different requirements wrt image libraries (it doesn't
3271 ### use -lXpm because it loads the xpm shared library dynamically at
3272 ### run time).
3273 if test "${opsys}" = "mingw32"; then
3274   if test "${with_xpm}" != "no"; then
3275     AC_CHECK_HEADER(X11/xpm.h, HAVE_XPM=yes, HAVE_XPM=no, [
3276 #define FOR_MSW 1])
3277   fi
3278
3279   if test "${HAVE_XPM}" = "yes"; then
3280     AC_DEFINE(HAVE_XPM, 1, [Define to 1 if you have the Xpm library (-lXpm).])
3281   fi
3282 fi
3283
3284 AC_SUBST(LIBXPM)
3285
3286 ### Use -ljpeg if available, unless '--with-jpeg=no'.
3287 HAVE_JPEG=no
3288 LIBJPEG=
3289 if test "${with_jpeg}" != "no"; then
3290   AC_CACHE_CHECK([for jpeglib 6b or later],
3291     [emacs_cv_jpeglib],
3292     [OLD_LIBS=$LIBS
3293      for emacs_cv_jpeglib in yes -ljpeg no; do
3294        case $emacs_cv_jpeglib in
3295          yes) ;;
3296          no) break;;
3297          *) LIBS="$LIBS $emacs_cv_jpeglib";;
3298        esac
3299        AC_LINK_IFELSE(
3300          [AC_LANG_PROGRAM(
3301             [[#undef HAVE_STDLIB_H /* Avoid config.h/jpeglib.h collision.  */
3302               #include <stdio.h> /* jpeglib.h needs FILE and size_t.  */
3303               #include <jpeglib.h>
3304               #include <jerror.h>
3305               char verify[JPEG_LIB_VERSION < 62 ? -1 : 1];
3306               struct jpeg_decompress_struct cinfo;
3307             ]],
3308             [[
3309               jpeg_create_decompress (&cinfo);
3310               WARNMS (&cinfo, JWRN_JPEG_EOF);
3311               jpeg_destroy_decompress (&cinfo);
3312             ]])],
3313          [emacs_link_ok=yes],
3314          [emacs_link_ok=no])
3315        LIBS=$OLD_LIBS
3316        test $emacs_link_ok = yes && break
3317      done])
3318   if test "$emacs_cv_jpeglib" != no; then
3319     HAVE_JPEG=yes
3320     AC_DEFINE([HAVE_JPEG], 1,
3321       [Define to 1 if you have the jpeg library (typically -ljpeg).])
3322     ### mingw32 doesn't use -ljpeg, since it loads the library
3323     ### dynamically when needed, and doesn't want a run-time
3324     ### dependency on the jpeglib DLL.
3325     test "$emacs_cv_jpeglib" != yes && test "${opsys}" != "mingw32" \
3326     && LIBJPEG=$emacs_cv_jpeglib
3327   fi
3328 fi
3329 AC_SUBST(LIBJPEG)
3330
3331 HAVE_ZLIB=no
3332 LIBZ=
3333 if test "${with_zlib}" != "no"; then
3334   OLIBS=$LIBS
3335   AC_SEARCH_LIBS([inflateEnd], [z], [HAVE_ZLIB=yes])
3336   LIBS=$OLIBS
3337   case $ac_cv_search_inflateEnd in
3338     -*) LIBZ=$ac_cv_search_inflateEnd ;;
3339   esac
3340 fi
3341 if test "${HAVE_ZLIB}" = "yes"; then
3342   AC_DEFINE([HAVE_ZLIB], 1, [Define to 1 if you have the zlib library (-lz).])
3343   ### mingw32 doesn't use -lz, since it loads the library dynamically.
3344   if test "${opsys}" = "mingw32"; then
3345      LIBZ=
3346   fi
3347 fi
3348 AC_SUBST(LIBZ)
3349
3350 ### Dynamic modules support
3351 LIBMODULES=
3352 HAVE_MODULES=no
3353 MODULES_OBJ=
3354 MODULES_SUFFIX=
3355 if test "${with_modules}" != "no"; then
3356   if test "$opsys" = "gnu-linux"; then
3357     LIBMODULES="-ldl"
3358     MODULES_SUFFIX=".so"
3359     HAVE_MODULES=yes
3360   elif test "$opsys" = "cygwin"; then
3361     MODULES_SUFFIX=".dll"
3362     HAVE_MODULES=yes
3363   elif test "$opsys" = "darwin"; then
3364     MODULES_SUFFIX=".so"
3365     HAVE_MODULES=yes
3366   elif test "$opsys" = "mingw32"; then
3367     MODULES_SUFFIX=".dll"
3368     HAVE_MODULES=yes
3369   else
3370     # BSD system have dlopen in the libc
3371     AC_CHECK_FUNC(dlopen, [MODULES_SUFFIX=".so"]
3372                           [HAVE_MODULES=yes], [])
3373   fi
3374
3375   if test "${HAVE_MODULES}" = no; then
3376     AC_MSG_ERROR([Dynamic modules are not supported on your system])
3377   else
3378     SAVE_LIBS=$LIBS
3379     LIBS="$LIBS $LIBMODULES"
3380     AC_CHECK_FUNCS([dladdr dlfunc])
3381     LIBS=$SAVE_LIBS
3382   fi
3383 fi
3384
3385 if test "${HAVE_MODULES}" = yes; then
3386    MODULES_OBJ="dynlib.o emacs-module.o"
3387    AC_DEFINE(HAVE_MODULES, 1, [Define to 1 if dynamic modules are enabled])
3388    AC_DEFINE_UNQUOTED(MODULES_SUFFIX, "$MODULES_SUFFIX",
3389      [System extension for dynamic libraries])
3390 fi
3391 AC_SUBST(MODULES_OBJ)
3392 AC_SUBST(LIBMODULES)
3393
3394 ### Use -lpng if available, unless '--with-png=no'.
3395 HAVE_PNG=no
3396 LIBPNG=
3397 PNG_CFLAGS=
3398 if test "${NS_IMPL_COCOA}" = yes; then
3399   : # Nothing to do
3400 elif test "${with_png}" != no; then
3401   # mingw32 loads the library dynamically.
3402   if test "$opsys" = mingw32; then
3403     AC_CHECK_HEADER([png.h], [HAVE_PNG=yes])
3404   elif test "${HAVE_X11}" = "yes" || test "${HAVE_W32}" = "yes"; then
3405     AC_MSG_CHECKING([for png])
3406     png_cflags=`(libpng-config --cflags) 2>&AS_MESSAGE_LOG_FD` &&
3407     png_libs=`(libpng-config --libs) 2>&AS_MESSAGE_LOG_FD` || {
3408       # libpng-config does not work; configure by hand.
3409       # Debian unstable as of July 2003 has multiple libpngs, and puts png.h
3410       # in /usr/include/libpng.
3411       if test -r /usr/include/libpng/png.h &&
3412          test ! -r /usr/include/png.h; then
3413         png_cflags=-I/usr/include/libpng
3414       else
3415         png_cflags=
3416       fi
3417       png_libs='-lpng'
3418     }
3419     SAVE_CFLAGS=$CFLAGS
3420     SAVE_LIBS=$LIBS
3421     CFLAGS="$CFLAGS $png_cflags"
3422     LIBS="$png_libs -lz -lm $LIBS"
3423     AC_LINK_IFELSE(
3424       [AC_LANG_PROGRAM([[#include <png.h>]],
3425          [[return !png_get_channels (0, 0);]])],
3426       [HAVE_PNG=yes
3427        PNG_CFLAGS=`AS_ECHO(["$png_cflags"]) | sed -e "$edit_cflags"`
3428        LIBPNG=$png_libs
3429        # $LIBPNG requires explicit -lz in some cases.
3430        # We don't know what those cases are, exactly, so play it safe and
3431        # append -lz to any nonempty $LIBPNG, unless we're already using LIBZ.
3432        if test -n "$LIBPNG" && test -z "$LIBZ"; then
3433          LIBPNG="$LIBPNG -lz"
3434        fi])
3435     CFLAGS=$SAVE_CFLAGS
3436     LIBS=$SAVE_LIBS
3437     AC_MSG_RESULT([$HAVE_PNG])
3438   fi
3439 fi
3440 if test $HAVE_PNG = yes; then
3441   AC_DEFINE([HAVE_PNG], [1], [Define to 1 if you have the png library.])
3442
3443   SAVE_CFLAGS=$CFLAGS
3444   CFLAGS="$CFLAGS $PNG_CFLAGS"
3445   AC_CHECK_DECL([png_longjmp],
3446     [],
3447     [AC_DEFINE([PNG_DEPSTRUCT], [],
3448        [Define to empty to suppress deprecation warnings when building
3449         with --enable-gcc-warnings and with libpng versions before 1.5,
3450         which lack png_longjmp.])],
3451     [[#include <png.h>
3452     ]])
3453   CFLAGS=$SAVE_CFLAGS
3454 fi
3455 AC_SUBST(LIBPNG)
3456 AC_SUBST(PNG_CFLAGS)
3457
3458 ### Use -ltiff if available, unless '--with-tiff=no'.
3459 ### mingw32 doesn't use -ltiff, since it loads the library dynamically.
3460 HAVE_TIFF=no
3461 LIBTIFF=
3462 if test "${opsys}" = "mingw32"; then
3463   if test "${with_tiff}" != "no"; then
3464     AC_CHECK_HEADER(tiffio.h, HAVE_TIFF=yes, HAVE_TIFF=no)
3465   fi
3466   if test "${HAVE_TIFF}" = "yes"; then
3467     AC_DEFINE(HAVE_TIFF, 1, [Define to 1 if you have the tiff library (-ltiff).])
3468   fi
3469 elif test "${HAVE_X11}" = "yes" || test "${HAVE_W32}" = "yes"; then
3470   if test "${with_tiff}" != "no"; then
3471     AC_CHECK_HEADER(tiffio.h,
3472       [tifflibs="-lz -lm"
3473       # At least one tiff package requires the jpeg library.
3474       if test "${HAVE_JPEG}" = yes; then tifflibs="-ljpeg $tifflibs"; fi
3475       AC_CHECK_LIB(tiff, TIFFGetVersion, HAVE_TIFF=yes, , $tifflibs)])
3476   fi
3477
3478   if test "${HAVE_TIFF}" = "yes"; then
3479     AC_DEFINE(HAVE_TIFF, 1, [Define to 1 if you have the tiff library (-ltiff).])
3480     dnl FIXME -lz -lm, as per libpng?
3481     LIBTIFF=-ltiff
3482   fi
3483 fi
3484 AC_SUBST(LIBTIFF)
3485
3486 ### Use -lgif or -lungif if available, unless '--with-gif=no'.
3487 ### mingw32 doesn't use -lgif/-lungif, since it loads the library dynamically.
3488 HAVE_GIF=no
3489 LIBGIF=
3490 if test "${opsys}" = "mingw32"; then
3491   if test "${with_gif}" != "no"; then
3492     AC_CHECK_HEADER(gif_lib.h, HAVE_GIF=yes, HAVE_GIF=no)
3493   fi
3494   if test "${HAVE_GIF}" = "yes"; then
3495     AC_DEFINE(HAVE_GIF, 1, [Define to 1 if you have a gif (or ungif) library.])
3496   fi
3497 elif test "${HAVE_X11}" = "yes" && test "${with_gif}" != "no" \
3498         || test "${HAVE_W32}" = "yes"; then
3499   AC_CHECK_HEADER(gif_lib.h,
3500 # EGifPutExtensionLast only exists from version libungif-4.1.0b1.
3501 # Earlier versions can crash Emacs, but version 5.0 removes EGifPutExtensionLast.
3502     [AC_CHECK_LIB(gif, GifMakeMapObject, HAVE_GIF=yes,
3503         [AC_CHECK_LIB(gif, EGifPutExtensionLast, HAVE_GIF=yes, HAVE_GIF=maybe)])])
3504
3505   if test "$HAVE_GIF" = yes; then
3506     LIBGIF=-lgif
3507   elif test "$HAVE_GIF" = maybe; then
3508 # If gif_lib.h but no libgif, try libungif.
3509     AC_CHECK_LIB(ungif, EGifPutExtensionLast, HAVE_GIF=yes, HAVE_GIF=no)
3510     test "$HAVE_GIF" = yes && LIBGIF=-lungif
3511   fi
3512
3513   if test "${HAVE_GIF}" = "yes"; then
3514     AC_DEFINE(HAVE_GIF, 1, [Define to 1 if you have a gif (or ungif) library.])
3515   fi
3516 fi
3517 AC_SUBST(LIBGIF)
3518
3519 dnl Check for required libraries.
3520 if test "${HAVE_X11}" = "yes"; then
3521   MISSING=""
3522   WITH_NO=""
3523   test "${with_xpm}" != "no" && test "${HAVE_XPM}" != "yes" &&
3524     MISSING="libXpm" && WITH_NO="--with-xpm=no"
3525   test "${with_jpeg}" != "no" && test "${HAVE_JPEG}" != "yes" &&
3526     MISSING="$MISSING libjpeg" && WITH_NO="$WITH_NO --with-jpeg=no"
3527   test "${with_png}" != "no" && test "${HAVE_PNG}" != "yes" &&
3528     MISSING="$MISSING libpng" && WITH_NO="$WITH_NO --with-png=no"
3529   test "${with_gif}" != "no" && test "${HAVE_GIF}" != "yes" &&
3530     MISSING="$MISSING libgif/libungif" && WITH_NO="$WITH_NO --with-gif=no"
3531   test "${with_tiff}" != "no" && test "${HAVE_TIFF}" != "yes" &&
3532     MISSING="$MISSING libtiff" && WITH_NO="$WITH_NO --with-tiff=no"
3533
3534   if test "X${MISSING}" != X; then
3535     AC_MSG_ERROR([The following required libraries were not found:
3536     $MISSING
3537 Maybe some development libraries/packages are missing?
3538 If you don't want to link with them give
3539     $WITH_NO
3540 as options to configure])
3541   fi
3542 fi
3543
3544 ### Use -lgpm if available, unless '--with-gpm=no'.
3545 HAVE_GPM=no
3546 LIBGPM=
3547 if test "${with_gpm}" != "no"; then
3548   AC_CHECK_HEADER(gpm.h,
3549     [AC_CHECK_LIB(gpm, Gpm_Open, HAVE_GPM=yes)])
3550
3551   if test "${HAVE_GPM}" = "yes"; then
3552     AC_DEFINE(HAVE_GPM, 1, [Define to 1 if you have the gpm library (-lgpm).])
3553     LIBGPM=-lgpm
3554   fi
3555 fi
3556 AC_SUBST(LIBGPM)
3557
3558 dnl Check for malloc/malloc.h on darwin
3559 AC_CHECK_HEADERS_ONCE(malloc/malloc.h)
3560
3561 GNUSTEP_CFLAGS=
3562 ### Use NeXTstep API to implement GUI.
3563 if test "${HAVE_NS}" = "yes"; then
3564   AC_DEFINE(HAVE_NS, 1, [Define to 1 if you are using the NeXTstep API, either GNUstep or Cocoa on Mac OS X.])
3565   if test "${NS_IMPL_COCOA}" = "yes"; then
3566     AC_DEFINE(NS_IMPL_COCOA, 1, [Define to 1 if you are using NS windowing under MacOS X.])
3567   fi
3568   if test "${NS_IMPL_GNUSTEP}" = "yes"; then
3569     AC_DEFINE(NS_IMPL_GNUSTEP, 1, [Define to 1 if you are using NS windowing under GNUstep.])
3570     if test $NS_GNUSTEP_CONFIG != yes; then
3571       # See also .m.o rule in src/Makefile.in.  */
3572       # FIXME: are all these flags really needed?  Document here why.  */
3573       GNUSTEP_CFLAGS="-D_REENTRANT -fPIC -fno-strict-aliasing -I${GNUSTEP_SYSTEM_HEADERS} ${GNUSTEP_LOCAL_HEADERS}"
3574       ## Extra CFLAGS applied to src/*.m files.
3575       GNU_OBJC_CFLAGS="$GNU_OBJC_CFLAGS -fgnu-runtime -Wno-import -fconstant-string-class=NSConstantString -DGNUSTEP_BASE_LIBRARY=1 -DGNU_GUI_LIBRARY=1 -DGNU_RUNTIME=1 -DGSWARN -DGSDIAGNOSE"
3576     fi
3577   fi
3578   OTHER_FILES=ns-app
3579 fi
3580
3581 ### Use session management (-lSM -lICE) if available
3582 HAVE_X_SM=no
3583 LIBXSM=
3584 if test "${HAVE_X11}" = "yes"; then
3585   AC_CHECK_HEADER(X11/SM/SMlib.h,
3586     [AC_CHECK_LIB(SM, SmcOpenConnection, HAVE_X_SM=yes, , -lICE)])
3587
3588   if test "${HAVE_X_SM}" = "yes"; then
3589     AC_DEFINE(HAVE_X_SM, 1, [Define to 1 if you have the SM library (-lSM).])
3590     LIBXSM="-lSM -lICE"
3591   fi
3592 fi
3593 AC_SUBST(LIBXSM)
3594
3595 ### Use XRandr (-lXrandr) if available
3596 HAVE_XRANDR=no
3597 if test "${HAVE_X11}" = "yes"; then
3598   XRANDR_REQUIRED=1.2.2
3599   XRANDR_MODULES="xrandr >= $XRANDR_REQUIRED"
3600   EMACS_CHECK_MODULES([XRANDR], [$XRANDR_MODULES])
3601   if test $HAVE_XRANDR = no; then
3602     # Test old way in case pkg-config doesn't have it (older machines).
3603     # Include Xrender.h by hand to work around bug in older Xrandr.h
3604     # (e.g. RHEL5) and silence (harmless) configure warning (bug#18465).
3605     AC_CHECK_HEADER(X11/extensions/Xrandr.h,
3606       [AC_CHECK_LIB(Xrandr, XRRGetScreenResources, HAVE_XRANDR=yes)],
3607       [], [AC_INCLUDES_DEFAULT
3608 #include <X11/extensions/Xrender.h>])
3609     if test $HAVE_XRANDR = yes; then
3610       XRANDR_LIBS=-lXrandr
3611     fi
3612   fi
3613   if test $HAVE_XRANDR = yes; then
3614     SAVE_CFLAGS="$CFLAGS"
3615     SAVE_LIBS="$LIBS"
3616     CFLAGS="$XRANDR_CFLAGS $CFLAGS"
3617     LIBS="$XRANDR_LIBS $LIBS"
3618     AC_CHECK_FUNCS(XRRGetOutputPrimary XRRGetScreenResourcesCurrent)
3619     CFLAGS="$SAVE_CFLAGS"
3620     LIBS="$SAVE_LIBS"
3621
3622     AC_DEFINE(HAVE_XRANDR, 1, [Define to 1 if you have the XRandr extension.])
3623   fi
3624 fi
3625 AC_SUBST(XRANDR_CFLAGS)
3626 AC_SUBST(XRANDR_LIBS)
3627
3628 ### Use Xinerama (-lXinerama) if available
3629 HAVE_XINERAMA=no
3630 if test "${HAVE_X11}" = "yes"; then
3631   XINERAMA_REQUIRED=1.0.2
3632   XINERAMA_MODULES="xinerama >= $XINERAMA_REQUIRED"
3633   EMACS_CHECK_MODULES([XINERAMA], [$XINERAMA_MODULES])
3634   if test $HAVE_XINERAMA = no; then
3635     # Test old way in case pkg-config doesn't have it (older machines).
3636     AC_CHECK_HEADER(X11/extensions/Xinerama.h,
3637       [AC_CHECK_LIB(Xinerama, XineramaQueryExtension, HAVE_XINERAMA=yes)])
3638     if test $HAVE_XINERAMA = yes; then
3639       XINERAMA_LIBS=-lXinerama
3640     fi
3641   fi
3642   if test $HAVE_XINERAMA = yes; then
3643     AC_DEFINE(HAVE_XINERAMA, 1, [Define to 1 if you have the Xinerama extension.])
3644   fi
3645 fi
3646 AC_SUBST(XINERAMA_CFLAGS)
3647 AC_SUBST(XINERAMA_LIBS)
3648
3649 ### Use Xfixes (-lXfixes) if available
3650 HAVE_XFIXES=no
3651 if test "${HAVE_X11}" = "yes"; then
3652   XFIXES_REQUIRED=4.0.0
3653   XFIXES_MODULES="xfixes >= $XFIXES_REQUIRED"
3654   EMACS_CHECK_MODULES([XFIXES], [$XFIXES_MODULES])
3655   if test $HAVE_XFIXES = no; then
3656     # Test old way in case pkg-config doesn't have it (older machines).
3657     AC_CHECK_HEADER(X11/extensions/Xfixes.h,
3658       [AC_CHECK_LIB(Xfixes, XFixesHideCursor, HAVE_XFIXES=yes)])
3659     if test $HAVE_XFIXES = yes; then
3660       XFIXES_LIBS=-lXfixes
3661     fi
3662   fi
3663   if test $HAVE_XFIXES = yes; then
3664     AC_DEFINE(HAVE_XFIXES, 1, [Define to 1 if you have the Xfixes extension.])
3665   fi
3666 fi
3667 AC_SUBST(XFIXES_CFLAGS)
3668 AC_SUBST(XFIXES_LIBS)
3669
3670 ### Use libxml (-lxml2) if available
3671 ### mingw32 doesn't use -lxml2, since it loads the library dynamically.
3672 HAVE_LIBXML2=no
3673 if test "${with_xml2}" != "no"; then
3674   ### I'm not sure what the version number should be, so I just guessed.
3675   EMACS_CHECK_MODULES([LIBXML2], [libxml-2.0 > 2.6.17])
3676   # Built-in libxml2 on OS X 10.8 lacks libxml-2.0.pc.
3677   if test "${HAVE_LIBXML2}" != "yes" && test "$opsys" = "darwin"; then
3678     SAVE_CPPFLAGS="$CPPFLAGS"
3679     if test -z "$xcsdkdir" -a -n "$XCRUN" -a ! -d /usr/include; then
3680       dnl /usr/include is not found.  Try Xcode SDK dir if it is sane.
3681       xcsdkdir=`$XCRUN --show-sdk-path 2>/dev/null`
3682       case $xcsdkdir in
3683         *[[\\\"\#\$\&\'\`$am_lf\ \      ]]*)
3684         xcsdkdir="" ;;
3685       esac
3686     fi
3687     CPPFLAGS="$CPPFLAGS -I$xcsdkdir/usr/include/libxml2"
3688     AC_CHECK_HEADER(libxml/HTMLparser.h,
3689       [AC_CHECK_DECL(HTML_PARSE_RECOVER, HAVE_LIBXML2=yes, ,
3690                      [#include <libxml/HTMLparser.h>])])
3691     CPPFLAGS="$SAVE_CPPFLAGS"
3692     if test "${HAVE_LIBXML2}" = "yes"; then
3693       LIBXML2_CFLAGS="-I'$xcsdkdir/usr/include/libxml2'"
3694       LIBXML2_LIBS="-lxml2"
3695     fi
3696   fi
3697   if test "${HAVE_LIBXML2}" = "yes"; then
3698     if test "${opsys}" != "mingw32"; then
3699       AC_CHECK_LIB(xml2, htmlReadMemory, HAVE_LIBXML2=yes, HAVE_LIBXML2=no,
3700         [$LIBXML2_LIBS])
3701     else
3702       LIBXML2_LIBS=""
3703     fi
3704     if test "${HAVE_LIBXML2}" = "yes"; then
3705       AC_DEFINE(HAVE_LIBXML2, 1, [Define to 1 if you have the libxml library (-lxml2).])
3706     else
3707       LIBXML2_LIBS=""
3708       LIBXML2_CFLAGS=""
3709     fi
3710   fi
3711 fi
3712 AC_SUBST(LIBXML2_LIBS)
3713 AC_SUBST(LIBXML2_CFLAGS)
3714
3715 # If netdb.h doesn't declare h_errno, we must declare it by hand.
3716 # On MinGW, that is provided by nt/inc/sys/socket.h and w32.c.
3717 if test "${opsys}" = "mingw32"; then
3718   emacs_cv_netdb_declares_h_errno=yes
3719 fi
3720 AC_CACHE_CHECK(whether netdb declares h_errno,
3721                emacs_cv_netdb_declares_h_errno,
3722 [AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <netdb.h>]],
3723   [[return h_errno;]])],
3724   emacs_cv_netdb_declares_h_errno=yes, emacs_cv_netdb_declares_h_errno=no)])
3725 if test $emacs_cv_netdb_declares_h_errno = yes; then
3726   AC_DEFINE(HAVE_H_ERRNO, 1, [Define to 1 if netdb.h declares h_errno.])
3727 fi
3728
3729 # Check for mail-locking functions in a "mail" library.  Probably this should
3730 # have the same check as for liblockfile below.
3731 AC_CHECK_LIB(mail, maillock, have_mail=yes, have_mail=no)
3732 if test $have_mail = yes; then
3733   LIBS_MAIL=-lmail
3734   AC_DEFINE(HAVE_LIBMAIL, 1, [Define to 1 if you have the 'mail' library (-lmail).])
3735
3736   OLD_LIBS=$LIBS
3737   LIBS="$LIBS_MAIL $LIBS"
3738   AC_CHECK_FUNCS(touchlock)
3739   LIBS=$OLD_LIBS
3740 else
3741   LIBS_MAIL=
3742 fi
3743 dnl Debian, at least:
3744 AC_CHECK_LIB(lockfile, maillock, have_lockfile=yes, have_lockfile=no)
3745 if test $have_lockfile = yes; then
3746    LIBS_MAIL=-llockfile
3747    AC_DEFINE(HAVE_LIBLOCKFILE, 1, [Define to 1 if you have the 'lockfile' library (-llockfile).])
3748 else
3749 # If we have the shared liblockfile, assume we must use it for mail
3750 # locking (e.g. Debian).  If we couldn't link against liblockfile
3751 # (no liblockfile.a installed), ensure that we don't need to.
3752   dnl This works for files generally, not just executables.
3753   dnl Should we look elsewhere for it?  Maybe examine /etc/ld.so.conf?
3754   AC_CHECK_PROG(liblockfile, liblockfile.so, yes, no,
3755                 /usr/lib:/lib:/usr/local/lib:$LD_LIBRARY_PATH)
3756   if test $ac_cv_prog_liblockfile = yes; then
3757     AC_MSG_ERROR([Shared liblockfile found but can't link against it.
3758 This probably means that movemail could lose mail.
3759 There may be a 'development' package to install containing liblockfile.])
3760   fi
3761 fi
3762 AC_CHECK_HEADERS_ONCE(maillock.h)
3763 AC_SUBST(LIBS_MAIL)
3764
3765 ## Define MAIL_USE_FLOCK (or LOCKF) if the mailer uses flock (or lockf) to
3766 ## interlock access to the mail spool.  The alternative is a lock file named
3767 ## /usr/spool/mail/$USER.lock.
3768 mail_lock=no
3769 case "$opsys" in
3770   aix4-2) mail_lock="lockf" ;;
3771
3772   gnu|freebsd|dragonfly|netbsd|openbsd|darwin|irix6-5) mail_lock="flock" ;;
3773
3774   ## On GNU/Linux systems, both methods are used by various mail programs.
3775   ## I assume most people are using newer mailers that have heard of flock.
3776   ## Change this if you need to.
3777   ## Debian contains a patch which says: "On Debian/GNU/Linux systems,
3778   ## configure gets the right answers, and that means *NOT* using flock.
3779   ## Using flock is guaranteed to be the wrong thing. See Debian Policy
3780   ## for details." and then uses '#ifdef DEBIAN'.  Unfortunately the
3781   ## Debian maintainer hasn't provided a clean fix for Emacs.
3782   ## movemail.c will use 'maillock' when MAILDIR, HAVE_LIBMAIL and
3783   ## HAVE_MAILLOCK_H are defined, so the following appears to be the
3784   ## correct logic.  -- fx
3785   ## We must check for HAVE_LIBLOCKFILE too, as movemail does.
3786   ## liblockfile is a Free Software replacement for libmail, used on
3787   ## Debian systems and elsewhere. -rfr.
3788   gnu-*)
3789     mail_lock="flock"
3790     if test $have_mail = yes || test $have_lockfile = yes; then
3791       test $ac_cv_header_maillock_h = yes && mail_lock=no
3792     fi
3793     ;;
3794
3795   mingw32)
3796     mail_lock="none-needed" ;;
3797 esac
3798
3799 BLESSMAIL_TARGET=
3800 case "$mail_lock" in
3801   flock) AC_DEFINE(MAIL_USE_FLOCK, 1, [Define if the mailer uses flock to interlock the mail spool.]) ;;
3802
3803   lockf) AC_DEFINE(MAIL_USE_LOCKF, 1, [Define if the mailer uses lockf to interlock the mail spool.]) ;;
3804
3805   none-needed) ;;
3806
3807   *) BLESSMAIL_TARGET="need-blessmail" ;;
3808 esac
3809 AC_SUBST(BLESSMAIL_TARGET)
3810
3811 OLD_LIBS=$LIBS
3812 LIBS="$LIB_PTHREAD $LIB_MATH $LIBS"
3813 AC_CHECK_FUNCS(accept4 fchdir gethostname \
3814 getrusage get_current_dir_name \
3815 lrand48 random rint \
3816 select getpagesize setlocale newlocale \
3817 getrlimit setrlimit shutdown getaddrinfo \
3818 pthread_sigmask strsignal setitimer \
3819 sendto recvfrom getsockname getpeername getifaddrs freeifaddrs \
3820 gai_strerror sync \
3821 getpwent endpwent getgrent endgrent \
3822 cfmakeraw cfsetspeed copysign __executable_start log2)
3823 LIBS=$OLD_LIBS
3824
3825 dnl No need to check for posix_memalign if aligned_alloc works.
3826 AC_CHECK_FUNCS([aligned_alloc posix_memalign], [break])
3827 AC_CHECK_DECLS([aligned_alloc], [], [], [[#include <stdlib.h>]])
3828
3829 dnl Cannot use AC_CHECK_FUNCS
3830 AC_CACHE_CHECK([for __builtin_unwind_init],
3831                emacs_cv_func___builtin_unwind_init,
3832 [AC_LINK_IFELSE([AC_LANG_PROGRAM([], [__builtin_unwind_init ();])],
3833                 emacs_cv_func___builtin_unwind_init=yes,
3834                 emacs_cv_func___builtin_unwind_init=no)])
3835 if test $emacs_cv_func___builtin_unwind_init = yes; then
3836   AC_DEFINE(HAVE___BUILTIN_UNWIND_INIT, 1,
3837             [Define to 1 if you have the '__builtin_unwind_init' function.])
3838 fi
3839
3840 AC_CHECK_HEADERS_ONCE(sys/un.h)
3841
3842 AC_FUNC_FSEEKO
3843
3844 # UNIX98 PTYs.
3845 AC_CHECK_FUNCS(grantpt)
3846
3847 # PTY-related GNU extensions.
3848 AC_CHECK_FUNCS(getpt posix_openpt)
3849
3850 # Check this now, so that we will NOT find the above functions in ncurses.
3851 # That is because we have not set up to link ncurses in lib-src.
3852 # It's better to believe a function is not available
3853 # than to expect to find it in ncurses.
3854 # Also we need tputs and friends to be able to build at all.
3855 AC_MSG_CHECKING([for library containing tputs])
3856 # Run a test program that contains a call to tputs, a call that is
3857 # never executed.  This tests whether a pre-'main' dynamic linker
3858 # works with the library.  It's too much trouble to actually call
3859 # tputs in the test program, due to portability hassles.  When
3860 # cross-compiling, assume the test program will run if it links.
3861 AC_DEFUN([tputs_link_source], [
3862   AC_LANG_SOURCE(
3863      [[extern void tputs (const char *, int, int (*)(int));
3864        int main (int argc, char **argv)
3865        {
3866           if (argc == 10000)
3867             tputs (argv[0], 0, 0);
3868           return 0;
3869        }]])
3870 ])
3871 if test "${opsys}" = "mingw32"; then
3872   msg='none required'
3873 else
3874   # Maybe curses should be tried earlier?
3875   # See http://debbugs.gnu.org/cgi/bugreport.cgi?bug=9736#35
3876   for tputs_library in '' tinfo ncurses terminfo termcap curses; do
3877     OLIBS=$LIBS
3878     if test -z "$tputs_library"; then
3879       LIBS_TERMCAP=
3880       msg='none required'
3881     else
3882       LIBS_TERMCAP=-l$tputs_library
3883       msg=$LIBS_TERMCAP
3884       LIBS="$LIBS_TERMCAP $LIBS"
3885     fi
3886     AC_RUN_IFELSE([tputs_link_source], [], [msg=no],
3887       [AC_LINK_IFELSE([tputs_link_source], [], [msg=no])])
3888     LIBS=$OLIBS
3889     if test "X$msg" != Xno; then
3890       break
3891     fi
3892   done
3893 fi
3894 AC_MSG_RESULT([$msg])
3895 if test "X$msg" = Xno; then
3896   AC_MSG_ERROR([The required function 'tputs' was not found in any library.
3897 The following libraries were tried (in order):
3898   libtinfo, libncurses, libterminfo, libtermcap, libcurses
3899 Please try installing whichever of these libraries is most appropriate
3900 for your system, together with its header files.
3901 For example, a libncurses-dev(el) or similar package.])
3902 fi
3903
3904 ## Use termcap instead of terminfo?
3905 ## Only true for: freebsd < 40000, ms-w32, msdos, netbsd < 599002500.
3906 TERMINFO=yes
3907 ## FIXME?  In the cases below where we unconditionally set
3908 ## LIBS_TERMCAP="-lncurses", this overrides LIBS_TERMCAP = -ltinfo,
3909 ## if that was found above to have tputs.
3910 ## Should we use the gnu* logic everywhere?
3911 case "$opsys" in
3912   ## darwin: Prevents crashes when running Emacs in Terminal.app under 10.2.
3913   ##  The ncurses library has been moved out of the System framework in
3914   ##  Mac OS X 10.2.  So if configure detects it, set the command-line
3915   ##  option to use it.
3916   darwin) LIBS_TERMCAP="-lncurses" ;;
3917
3918   gnu*) test -z "$LIBS_TERMCAP" && LIBS_TERMCAP="-lncurses" ;;
3919
3920   freebsd)
3921     AC_MSG_CHECKING([whether FreeBSD is new enough to use terminfo])
3922     AC_CACHE_VAL(emacs_cv_freebsd_terminfo,
3923     [AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <osreldate.h>]],
3924 [[#if __FreeBSD_version < 400000
3925 fail;
3926 #endif
3927 ]])], emacs_cv_freebsd_terminfo=yes, emacs_cv_freebsd_terminfo=no)])
3928
3929     AC_MSG_RESULT($emacs_cv_freebsd_terminfo)
3930
3931     if test $emacs_cv_freebsd_terminfo = yes; then
3932       LIBS_TERMCAP="-lncurses"
3933     else
3934       TERMINFO=no
3935       LIBS_TERMCAP="-ltermcap"
3936     fi
3937     ;;
3938
3939   mingw32)
3940     TERMINFO=no
3941     LIBS_TERMCAP=
3942     ;;
3943
3944   netbsd)
3945     if test "x$LIBS_TERMCAP" != "x-lterminfo"; then
3946       TERMINFO=no
3947       LIBS_TERMCAP="-ltermcap"
3948     fi
3949     ;;
3950
3951   openbsd | dragonfly) LIBS_TERMCAP="-lncurses" ;;
3952
3953   ## hpux: Make sure we get select from libc rather than from libcurses
3954   ##  because libcurses on HPUX 10.10 has a broken version of select.
3955   ##  We used to use -lc -lcurses, but this may be cleaner.
3956   ## FIXME?  But TERMINFO = yes on hpux (it used to be explicitly
3957   # set that way, now it uses the default).  Isn't this a contradiction?
3958   hpux*) LIBS_TERMCAP="-ltermcap" ;;
3959
3960 esac
3961
3962 TERMCAP_OBJ=tparam.o
3963 if test $TERMINFO = yes; then
3964   AC_DEFINE(TERMINFO, 1, [Define to 1 if you use terminfo instead of termcap.])
3965   TERMCAP_OBJ=terminfo.o
3966 fi
3967 if test "X$LIBS_TERMCAP" = "X-lncurses"; then
3968   AC_DEFINE(USE_NCURSES, 1, [Define to 1 if you use ncurses.])
3969 fi
3970 AC_SUBST(LIBS_TERMCAP)
3971 AC_SUBST(TERMCAP_OBJ)
3972
3973 # GNU/Linux-specific timer functions.
3974 AC_CACHE_CHECK([for timerfd interface], [emacs_cv_have_timerfd],
3975   [AC_COMPILE_IFELSE(
3976      [AC_LANG_PROGRAM([[#include <sys/timerfd.h>
3977                       ]],
3978                       [[timerfd_create (CLOCK_REALTIME,
3979                                         TFD_CLOEXEC | TFD_NONBLOCK);
3980                         timerfd_settime (0, TFD_TIMER_ABSTIME, 0, 0);]])],
3981      [emacs_cv_have_timerfd=yes],
3982      [emacs_cv_have_timerfd=no])])
3983 if test "$emacs_cv_have_timerfd" = yes; then
3984   AC_DEFINE([HAVE_TIMERFD], 1,
3985     [Define to 1 if timerfd functions are supported as in GNU/Linux.])
3986 fi
3987
3988 # Alternate stack for signal handlers.
3989 AC_CACHE_CHECK([whether signals can be handled on alternate stack],
3990                [emacs_cv_alternate_stack],
3991   [AC_COMPILE_IFELSE(
3992      [AC_LANG_PROGRAM([[#include <signal.h>
3993                       ]],
3994                       [[stack_t ss;
3995                         struct sigaction sa;
3996                         ss.ss_sp = malloc (SIGSTKSZ);
3997                         ss.ss_size = SIGSTKSZ;
3998                         sa.sa_flags = SA_SIGINFO | SA_ONSTACK;
3999                         sigaltstack (&ss, 0);
4000                         sigaction (SIGSEGV, &sa, 0);]])],
4001      [emacs_cv_alternate_stack=yes],
4002      [emacs_cv_alternate_stack=no])])
4003
4004 # Do we have res_init, for detecting changes in /etc/resolv.conf?
4005 # On Darwin, res_init appears not to be useful: see bug#562 and
4006 # http://lists.gnu.org/archive/html/emacs-devel/2007-11/msg01467.html
4007 resolv=no
4008
4009 if test $opsys != darwin; then
4010
4011   AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <netinet/in.h>
4012 #include <arpa/nameser.h>
4013 #include <resolv.h>]],
4014     [[return res_init();]])],
4015     have_res_init=yes, have_res_init=no)
4016   if test "$have_res_init" = no; then
4017     OLIBS="$LIBS"
4018     LIBS="$LIBS -lresolv"
4019     AC_MSG_CHECKING(for res_init with -lresolv)
4020     AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <netinet/in.h>
4021 #include <arpa/nameser.h>
4022 #include <resolv.h>]],
4023       [[return res_init();]])],
4024       have_res_init=yes, have_res_init=no)
4025     AC_MSG_RESULT($have_res_init)
4026     if test "$have_res_init" = yes ; then
4027       resolv=yes
4028     fi
4029     LIBS="$OLIBS"
4030   fi
4031
4032   if test "$have_res_init" = yes; then
4033     AC_DEFINE(HAVE_RES_INIT, 1, [Define to 1 if res_init is available.])
4034   fi
4035 fi                              dnl !darwin
4036
4037 # Do we need the Hesiod library to provide the support routines?
4038 dnl FIXME?  Should we be skipping this on Darwin too?
4039 LIBHESIOD=
4040 if test "$with_hesiod" != no ; then
4041   # Don't set $LIBS here -- see comments above.  FIXME which comments?
4042   AC_CHECK_FUNC(res_send, , [AC_CHECK_FUNC(__res_send, ,
4043      [AC_CHECK_LIB(resolv, res_send, resolv=yes,
4044                   [AC_CHECK_LIB(resolv, __res_send, resolv=yes)])])])
4045   if test "$resolv" = yes ; then
4046     RESOLVLIB=-lresolv
4047   else
4048     RESOLVLIB=
4049   fi
4050   AC_CHECK_FUNC(hes_getmailhost, , [AC_CHECK_LIB(hesiod, hes_getmailhost,
4051         hesiod=yes, :, $RESOLVLIB)])
4052
4053   if test x"$hesiod" = xyes; then
4054     LIBHESIOD=-lhesiod
4055   fi
4056 fi
4057 AC_SUBST(LIBHESIOD)
4058
4059 # Do we need libresolv (due to res_init or Hesiod)?
4060 if test "$resolv" = yes && test $opsys != darwin; then
4061   LIBRESOLV=-lresolv
4062 else
4063   LIBRESOLV=
4064 fi
4065 AC_SUBST(LIBRESOLV)
4066
4067 # These tell us which Kerberos-related libraries to use.
4068 COM_ERRLIB=
4069 CRYPTOLIB=
4070 KRB5LIB=
4071 DESLIB=
4072 KRB4LIB=
4073
4074 if test "${with_kerberos}" != no; then
4075   OLD_LIBS=$LIBS
4076   AC_CHECK_LIB(com_err, com_err, have_com_err=yes, have_com_err=no)
4077   if test $have_com_err = yes; then
4078     COM_ERRLIB=-lcom_err
4079     LIBS="$COM_ERRLIB $LIBS"
4080   fi
4081   AC_CHECK_LIB(crypto, mit_des_cbc_encrypt, have_crypto=yes, have_crypto=no)
4082   if test $have_crypto = yes; then
4083     CRYPTOLIB=-lcrypto
4084     LIBS="$CRYPTOLIB $LIBS"
4085   fi
4086   AC_CHECK_LIB(k5crypto, mit_des_cbc_encrypt, have_k5crypto=yes, have_k5crypto=no)
4087   if test $have_k5crypto = yes; then
4088     CRYPTOLIB=-lk5crypto
4089     LIBS="$CRYPTOLIB $LIBS"
4090   fi
4091   AC_CHECK_LIB(krb5, krb5_init_context, have_krb5=yes, have_krb5=no)
4092   if test $have_krb5=yes; then
4093     KRB5LIB=-lkrb5
4094     LIBS="$KRB5LIB $LIBS"
4095   fi
4096   dnl FIXME Simplify.  Does not match 22 logic, thanks to default_off?
4097   if test "${with_kerberos5}" = no; then
4098     AC_CHECK_LIB(des425, des_cbc_encrypt, have_des425=yes, have_des425=no )
4099     if test $have_des425 = yes; then
4100       DESLIB=-ldes425
4101       LIBS="$DESLIB $LIBS"
4102     else
4103       AC_CHECK_LIB(des, des_cbc_encrypt, have_des=yes, have_des=no)
4104       if test $have_des = yes; then
4105         DESLIB=-ldes
4106         LIBS="$DESLIB $LIBS"
4107       fi
4108     fi
4109     AC_CHECK_LIB(krb4, krb_get_cred, have_krb4=yes, have_krb4=no)
4110     if test $have_krb4 = yes; then
4111       KRB4LIB=-lkrb4
4112       LIBS="$KRB4LIB $LIBS"
4113     else
4114       AC_CHECK_LIB(krb, krb_get_cred, have_krb=yes, have_krb=no)
4115       if test $have_krb = yes; then
4116         KRB4LIB=-lkrb
4117         LIBS="$KRB4LIB $LIBS"
4118       fi
4119     fi
4120   fi
4121
4122   if test "${with_kerberos5}" != no; then
4123     AC_CHECK_HEADERS(krb5.h,
4124       [AC_CHECK_MEMBERS([krb5_error.text, krb5_error.e_text],,,
4125                         [#include <krb5.h>])])
4126   else
4127     AC_CHECK_HEADERS(krb.h,,
4128                      [AC_CHECK_HEADERS(kerberosIV/krb.h,,
4129                                        [AC_CHECK_HEADERS(kerberos/krb.h)])])
4130   fi
4131   AC_CHECK_HEADERS(com_err.h)
4132   LIBS=$OLD_LIBS
4133 fi
4134
4135 AC_SUBST(COM_ERRLIB)
4136 AC_SUBST(CRYPTOLIB)
4137 AC_SUBST(KRB5LIB)
4138 AC_SUBST(DESLIB)
4139 AC_SUBST(KRB4LIB)
4140
4141 AC_CHECK_HEADERS(valgrind/valgrind.h)
4142
4143 AC_CHECK_MEMBERS([struct unipair.unicode], [], [], [[#include <linux/kd.h>]])
4144
4145 AC_CHECK_FUNCS_ONCE(tzset)
4146
4147 ok_so_far=yes
4148 AC_CHECK_FUNC(socket, , ok_so_far=no)
4149 if test $ok_so_far = yes; then
4150   AC_CHECK_HEADER(netinet/in.h, , ok_so_far=no)
4151 fi
4152 if test $ok_so_far = yes; then
4153   AC_CHECK_HEADER(arpa/inet.h, , ok_so_far=no)
4154 fi
4155 if test $ok_so_far = yes; then
4156 dnl Fixme: Not used.  Should this be HAVE_SOCKETS?
4157   AC_DEFINE(HAVE_INET_SOCKETS, 1,
4158             [Define to 1 if you have inet sockets.])
4159 fi
4160
4161 AC_FUNC_FORK
4162
4163 AC_CHECK_FUNCS(snprintf)
4164
4165 dnl Check for glib.  This differs from other library checks in that
4166 dnl Emacs need not link to glib unless some other library is already
4167 dnl linking to glib.  Although glib provides no facilities that Emacs
4168 dnl needs for its own purposes, when glib is present Emacs needs to
4169 dnl use primitives like g_main_context_query to avoid clashing with
4170 dnl glib at a low level.
4171 dnl
4172 dnl Check this late, since it depends on $GTK_CFLAGS etc.
4173 XGSELOBJ=
4174 OLDCFLAGS="$CFLAGS"
4175 OLDLIBS="$LIBS"
4176 CFLAGS="$CFLAGS $GTK_CFLAGS $RSVG_CFLAGS $DBUS_CFLAGS $SETTINGS_CFLAGS"
4177 LIBS="$LIBS $GTK_LIBS $RSVG_LIBS $DBUS_LIBS $SETTINGS_LIBS"
4178 CFLAGS="$CFLAGS $NOTIFY_CFLAGS $CAIRO_CFLAGS"
4179 LIBS="$LIBS $NOTIFY_LIBS $CAIRO_LIBS"
4180 AC_MSG_CHECKING([whether GLib is linked in])
4181 AC_LINK_IFELSE([AC_LANG_PROGRAM(
4182         [[#include <glib.h>
4183         ]],
4184         [[g_print ("Hello world");]])],
4185      [links_glib=yes],
4186      [links_glib=no])
4187 AC_MSG_RESULT([$links_glib])
4188 if test "${links_glib}" = "yes"; then
4189   AC_DEFINE(HAVE_GLIB, 1, [Define to 1 if GLib is linked in.])
4190   if test "$HAVE_NS" = no;then
4191     XGSELOBJ=xgselect.o
4192   fi
4193 fi
4194 CFLAGS="$OLDCFLAGS"
4195 LIBS="$OLDLIBS"
4196 AC_SUBST(XGSELOBJ)
4197
4198 dnl Adapted from Haible's version.
4199 AC_CACHE_CHECK([for nl_langinfo and CODESET], emacs_cv_langinfo_codeset,
4200   [AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <langinfo.h>]],
4201     [[char* cs = nl_langinfo(CODESET);]])],
4202     emacs_cv_langinfo_codeset=yes,
4203     emacs_cv_langinfo_codeset=no)
4204   ])
4205 if test $emacs_cv_langinfo_codeset = yes; then
4206   AC_DEFINE(HAVE_LANGINFO_CODESET, 1,
4207     [Define if you have <langinfo.h> and nl_langinfo(CODESET).])
4208 fi
4209
4210 AC_TYPE_MBSTATE_T
4211
4212 dnl Fixme: AC_SYS_POSIX_TERMIOS should probably be used, but it's not clear
4213 dnl how the tty code is related to POSIX and/or other versions of termios.
4214 dnl The following looks like a useful start.
4215 dnl
4216 dnl AC_SYS_POSIX_TERMIOS
4217 dnl if test $ac_cv_sys_posix_termios = yes; then
4218 dnl    AC_DEFINE(HAVE_TERMIOS, 1, [Define to 1 if you have POSIX-style functions
4219 dnl                                and macros for terminal control.])
4220 dnl    AC_DEFINE(HAVE_TCATTR, 1, [Define to 1 if you have tcgetattr and tcsetattr.])
4221 dnl fi
4222
4223 dnl Turned on June 1996 supposing nobody will mind it.
4224 dnl MinGW emulates passwd database, so this feature doesn't make sense there.
4225 if test "${opsys}" != "mingw32"; then
4226    AC_DEFINE(AMPERSAND_FULL_NAME, 1, [Define to use the convention that &
4227      in the full name stands for the login id.])
4228 fi
4229
4230 dnl Everybody supports this, except MS.
4231 dnl Seems like the kind of thing we should be testing for, though.
4232 ## Note: PTYs are broken on darwin <6.  Use at your own risk.
4233 if test "${opsys}" != "mingw32"; then
4234   AC_DEFINE(HAVE_PTYS, 1, [Define if the system supports pty devices.])
4235 fi
4236
4237 dnl Everybody supports this, except MS-DOS.
4238 dnl Seems like the kind of thing we should be testing for, though.
4239 dnl Compare with HAVE_INET_SOCKETS (which is unused...) above.
4240 AC_DEFINE(HAVE_SOCKETS, 1, [Define if the system supports
4241   4.2-compatible sockets.])
4242
4243 AH_TEMPLATE(INTERNAL_TERMINAL, [This is substituted when $TERM is "internal".])
4244
4245 AH_TEMPLATE(NULL_DEVICE, [Name of the file to open to get
4246   a null file, or a data sink.])
4247 if test "${opsys}" = "mingw32"; then
4248   AC_DEFINE(NULL_DEVICE, ["NUL:"])
4249 else
4250   AC_DEFINE(NULL_DEVICE, ["/dev/null"])
4251 fi
4252
4253 if test "${opsys}" = "mingw32"; then
4254   SEPCHAR=';'
4255 else
4256   SEPCHAR=':'
4257 fi
4258 AC_DEFINE_UNQUOTED(SEPCHAR, ['$SEPCHAR'], [Character that separates PATH elements.])
4259 dnl This is for MinGW, and is used in test/Makefile.in.
4260 dnl The MSYS Bash has heuristics for replacing ':' with ';' when it
4261 dnl decides that a command-line argument to be passed to a MinGW program
4262 dnl is a PATH-style list of directories.  But that heuristics plays it
4263 dnl safe, and only does the replacement when it is _absolutely_ sure it
4264 dnl sees a colon-separated list of file names; e.g. ":." is left alone,
4265 dnl which breaks in-tree builds.  So we do this manually instead.
4266 dnl Note that we cannot rely on PATH_SEPARATOR, as that one will always
4267 dnl be computed as ':' in MSYS Bash.
4268 AC_SUBST(SEPCHAR)
4269
4270 dnl Everybody supports this, except MS-DOS.
4271 AC_DEFINE(subprocesses, 1, [Define to enable asynchronous subprocesses.])
4272
4273 AC_DEFINE(USER_FULL_NAME, [pw->pw_gecos], [How to get a user's full name.])
4274
4275
4276 AC_DEFINE(DIRECTORY_SEP, ['/'],
4277   [Character that separates directories in a file name.])
4278
4279 if test "${opsys}" = "mingw32"; then
4280   AC_DEFINE(IS_DEVICE_SEP(_c_), [((_c_) == ':')],
4281     [Returns true if character is a device separator.])
4282
4283   AC_DEFINE(IS_DIRECTORY_SEP(_c_), [((_c_) == '/' || (_c_) == '\\')],
4284     [Returns true if character is a directory separator.])
4285
4286   AC_DEFINE(IS_ANY_SEP(_c_), [(IS_DIRECTORY_SEP (_c_) || IS_DEVICE_SEP(_c_))],
4287     [Returns true if character is any form of separator.])
4288 else
4289   AC_DEFINE(IS_DEVICE_SEP(_c_), 0,
4290     [Returns true if character is a device separator.])
4291
4292   AC_DEFINE(IS_DIRECTORY_SEP(_c_), [((_c_) == DIRECTORY_SEP)],
4293     [Returns true if character is a directory separator.])
4294
4295   AC_DEFINE(IS_ANY_SEP(_c_), [(IS_DIRECTORY_SEP (_c_))],
4296     [Returns true if character is any form of separator.])
4297 fi
4298
4299 AH_TEMPLATE(NO_EDITRES, [Define if XEditRes should not be used.])
4300
4301 case $opsys in
4302   aix4-2)
4303     dnl Unfortunately without libXmu we cannot support EditRes.
4304     if test "x$ac_cv_search_XmuConvertStandardSelection" = xno; then
4305       AC_DEFINE(NO_EDITRES, 1)
4306     fi
4307     ;;
4308
4309   hpux*)
4310     dnl Assar Westerlund <assar@sics.se> says this is necessary for
4311     dnl HP-UX 10.20, and that it works for HP-UX 0 as well.
4312     AC_DEFINE(NO_EDITRES, 1)
4313     ;;
4314 esac
4315
4316
4317 case $opsys in
4318   irix6-5 | sol2* | unixware )
4319     dnl Some SVr4s don't define NSIG in sys/signal.h for ANSI environments;
4320     dnl instead, there's a system variable _sys_nsig.  Unfortunately, we
4321     dnl need the constant to dimension an array.  So wire in the appropriate
4322     dnl value here.
4323     AC_DEFINE(NSIG_MINIMUM, 32, [Minimum value of NSIG.])
4324     ;;
4325 esac
4326
4327 emacs_broken_SIGIO=no
4328
4329 case $opsys in
4330   dnl SIGIO exists, but the feature doesn't work in the way Emacs needs.
4331   dnl See eg <http://article.gmane.org/gmane.os.openbsd.ports/46831>.
4332   hpux* | irix6-5 | nacl | openbsd | sol2* | unixware )
4333     emacs_broken_SIGIO=yes
4334     ;;
4335
4336   aix4-2)
4337     dnl On AIX Emacs uses the gmalloc.c malloc implementation.  But given
4338     dnl the way this system works, libc functions that return malloced
4339     dnl memory use the libc malloc implementation. Calling xfree or
4340     dnl xrealloc on the results of such functions results in a crash.
4341     dnl
4342     dnl One solution for this could be to define SYSTEM_MALLOC in configure,
4343     dnl but that does not currently work on this system.
4344     dnl
4345     dnl It is possible to completely override the malloc implementation on
4346     dnl AIX, but that involves putting the malloc functions in a shared
4347     dnl library and setting the MALLOCTYPE environment variable to point to
4348     dnl that shared library.
4349     dnl
4350     dnl Emacs currently calls xrealloc on the results of get_current_dir name,
4351     dnl to avoid a crash just use the Emacs implementation for that function.
4352     dnl
4353     dnl FIXME We could change the AC_CHECK_FUNCS call near the start
4354     dnl of this file, so that we do not check for get_current_dir_name
4355     dnl on AIX.  But that might be fragile if something else ends
4356     dnl up testing for get_current_dir_name as a dependency.
4357     AC_DEFINE(BROKEN_GET_CURRENT_DIR_NAME, 1, [Define if
4358       get_current_dir_name should not be used.])
4359     ;;
4360
4361   freebsd)
4362     dnl Circumvent a bug in FreeBSD.  In the following sequence of
4363     dnl writes/reads on a PTY, read(2) returns bogus data:
4364     dnl
4365     dnl write(2)  1022 bytes
4366     dnl write(2)   954 bytes, get EAGAIN
4367     dnl read(2)   1024 bytes in process_read_output
4368     dnl read(2)     11 bytes in process_read_output
4369     dnl
4370     dnl That is, read(2) returns more bytes than have ever been written
4371     dnl successfully.  The 1033 bytes read are the 1022 bytes written
4372     dnl successfully after processing (for example with CRs added if the
4373     dnl terminal is set up that way which it is here).  The same bytes will
4374     dnl be seen again in a later read(2), without the CRs.
4375     AC_DEFINE(BROKEN_PTY_READ_AFTER_EAGAIN, 1, [Define on FreeBSD to
4376       work around an issue when reading from a PTY.])
4377     ;;
4378 esac
4379
4380 case $opsys in
4381   gnu-* | sol2-10 )
4382     dnl FIXME Can't we test if this exists (eg /proc/$$)?
4383     AC_DEFINE(HAVE_PROCFS, 1, [Define if you have the /proc filesystem.])
4384   ;;
4385 esac
4386
4387 case $opsys in
4388   darwin | dragonfly | freebsd | netbsd | openbsd )
4389     AC_DEFINE(DONT_REOPEN_PTY, 1, [Define if process.c does not need to
4390       close a pty to make it a controlling terminal (it is already a
4391       controlling terminal of the subprocess, because we did ioctl TIOCSCTTY).])
4392   ;;
4393 esac
4394
4395 dnl FIXME Surely we can test for this rather than hard-code it.
4396 case $opsys in
4397   netbsd | openbsd) sound_device="/dev/audio" ;;
4398   *) sound_device="/dev/dsp" ;;
4399 esac
4400
4401 dnl Used in sound.c
4402 AC_DEFINE_UNQUOTED(DEFAULT_SOUND_DEVICE, "$sound_device",
4403   [Name of the default sound device.])
4404
4405
4406 dnl Emacs can read input using SIGIO and buffering characters itself,
4407 dnl or using CBREAK mode and making C-g cause SIGINT.
4408 dnl The choice is controlled by the variable interrupt_input.
4409 dnl
4410 dnl Define INTERRUPT_INPUT to make interrupt_input = 1 the default (use SIGIO)
4411 dnl
4412 dnl Emacs uses the presence of the USABLE_SIGIO macro
4413 dnl to indicate whether or not signal-driven I/O is possible.  It uses
4414 dnl INTERRUPT_INPUT to decide whether to use it by default.
4415 dnl
4416 dnl SIGIO can be used only on systems that implement it (4.2 and 4.3).
4417 dnl CBREAK mode has two disadvantages
4418 dnl 1) At least in 4.2, it is impossible to handle the Meta key properly.
4419 dnl I hear that in system V this problem does not exist.
4420 dnl 2) Control-G causes output to be discarded.
4421 dnl I do not know whether this can be fixed in system V.
4422 dnl
4423 dnl Another method of doing input is planned but not implemented.
4424 dnl It would have Emacs fork off a separate process
4425 dnl to read the input and send it to the true Emacs process
4426 dnl through a pipe.
4427 case $opsys in
4428   darwin | gnu-linux | gnu-kfreebsd )
4429     AC_DEFINE(INTERRUPT_INPUT, 1, [Define to read input using SIGIO.])
4430   ;;
4431 esac
4432
4433
4434 dnl If the system's imake configuration file defines 'NeedWidePrototypes'
4435 dnl as 'NO', we must define NARROWPROTO manually.  Such a define is
4436 dnl generated in the Makefile generated by 'xmkmf'.  If we don't define
4437 dnl NARROWPROTO, we will see the wrong function prototypes for X functions
4438 dnl taking float or double parameters.
4439 case $opsys in
4440   cygwin|gnu|gnu-linux|gnu-kfreebsd|irix6-5|freebsd|netbsd|openbsd)
4441     AC_DEFINE(NARROWPROTO, 1, [Define if system's imake configuration
4442       file defines 'NeedWidePrototypes' as 'NO'.])
4443   ;;
4444 esac
4445
4446
4447 dnl Used in process.c, this must be a loop, even if it only runs once.
4448 dnl (Except on SGI; see below.  Take that, clarity and consistency!)
4449 AH_TEMPLATE(PTY_ITERATION, [How to iterate over PTYs.])
4450 dnl Only used if !PTY_ITERATION.  Iterate from FIRST_PTY_LETTER to z,
4451 dnl trying suffixes 0-16.
4452 AH_TEMPLATE(FIRST_PTY_LETTER, [Letter to use in finding device name of
4453   first PTY, if PTYs are supported.])
4454 AH_TEMPLATE(PTY_OPEN, [How to open a PTY, if non-standard.])
4455 AH_TEMPLATE(PTY_NAME_SPRINTF, [How to get the device name of the control
4456   end of a PTY, if non-standard.])
4457 AH_TEMPLATE(PTY_TTY_NAME_SPRINTF, [How to get device name of the tty
4458   end of a PTY, if non-standard.])
4459
4460 case $opsys in
4461   aix4-2 )
4462     AC_DEFINE(PTY_ITERATION, [int c; for (c = 0; !c ; c++)])
4463     dnl You allocate a pty by opening /dev/ptc to get the master side.
4464     dnl To get the name of the slave side, you just ttyname() the master side.
4465     AC_DEFINE(PTY_NAME_SPRINTF, [strcpy (pty_name, "/dev/ptc");])
4466     AC_DEFINE(PTY_TTY_NAME_SPRINTF, [strcpy (pty_name, ttyname (fd));])
4467     ;;
4468
4469   cygwin )
4470     AC_DEFINE(PTY_ITERATION, [int i; for (i = 0; i < 1; i++)])
4471     dnl multi-line AC_DEFINEs are hard. :(
4472     AC_DEFINE(PTY_OPEN, [ do { int dummy; sigset_t blocked, procmask; sigemptyset (&blocked); sigaddset (&blocked, SIGCHLD); pthread_sigmask (SIG_BLOCK, &blocked, &procmask); if (-1 == openpty (&fd, &dummy, pty_name, 0, 0)) fd = -1; pthread_sigmask (SIG_SETMASK, &procmask, 0); if (fd >= 0) emacs_close (dummy); } while (false)])
4473     AC_DEFINE(PTY_NAME_SPRINTF, [])
4474     AC_DEFINE(PTY_TTY_NAME_SPRINTF, [])
4475     ;;
4476
4477   gnu | openbsd )
4478     AC_DEFINE(FIRST_PTY_LETTER, ['p'])
4479     ;;
4480
4481   gnu-linux | gnu-kfreebsd | dragonfly | freebsd | netbsd | darwin | nacl )
4482     dnl if HAVE_GRANTPT
4483     if test "x$ac_cv_func_grantpt" = xyes; then
4484       AC_DEFINE(UNIX98_PTYS, 1, [Define if the system has Unix98 PTYs.])
4485       AC_DEFINE(PTY_ITERATION, [int i; for (i = 0; i < 1; i++)])
4486       dnl Note that grantpt and unlockpt may fork.  We must block SIGCHLD
4487       dnl to prevent sigchld_handler from intercepting the child's death.
4488       AC_DEFINE(PTY_TTY_NAME_SPRINTF, [{ char *ptyname = 0; sigset_t blocked; sigemptyset (&blocked); sigaddset (&blocked, SIGCHLD); pthread_sigmask (SIG_BLOCK, &blocked, 0); if (grantpt (fd) != -1 && unlockpt (fd) != -1) ptyname = ptsname(fd); pthread_sigmask (SIG_UNBLOCK, &blocked, 0); if (!ptyname) { emacs_close (fd); return -1; } snprintf (pty_name, PTY_NAME_SIZE, "%s", ptyname); }])
4489       dnl if HAVE_POSIX_OPENPT
4490       if test "x$ac_cv_func_posix_openpt" = xyes; then
4491         AC_DEFINE(PTY_OPEN, [do { fd = posix_openpt (O_RDWR | O_CLOEXEC | O_NOCTTY); if (fd < 0 && errno == EINVAL) fd = posix_openpt (O_RDWR | O_NOCTTY); } while (false)])
4492         AC_DEFINE(PTY_NAME_SPRINTF, [])
4493       dnl if HAVE_GETPT
4494       elif test "x$ac_cv_func_getpt" = xyes; then
4495         AC_DEFINE(PTY_OPEN, [fd = getpt ()])
4496         AC_DEFINE(PTY_NAME_SPRINTF, [])
4497       else
4498         AC_DEFINE(PTY_NAME_SPRINTF, [strcpy (pty_name, "/dev/ptmx");])
4499       fi
4500     else
4501       AC_DEFINE(FIRST_PTY_LETTER, ['p'])
4502     fi
4503     ;;
4504
4505   hpux*)
4506     AC_DEFINE(FIRST_PTY_LETTER, ['p'])
4507     AC_DEFINE(PTY_NAME_SPRINTF, [sprintf (pty_name, "/dev/ptym/pty%c%x", c, i);])
4508     AC_DEFINE(PTY_TTY_NAME_SPRINTF, [sprintf (pty_name, "/dev/pty/tty%c%x", c, i);])
4509     ;;
4510
4511   irix6-5 )
4512     dnl It looks like this cannot be right, because it is not a loop.
4513     dnl However, process.c actually does this:
4514     dnl # ifndef __sgi
4515     dnl   continue;
4516     dnl # else
4517     dnl   return -1;
4518     dnl # endif
4519     dnl which presumably makes it OK, since irix == sgi (?).
4520     dnl FIXME it seems like this special treatment is unnecessary?
4521     dnl Why can't irix use a single-trip loop like eg cygwin?
4522     AC_DEFINE(PTY_ITERATION, [])
4523     dnl Not used, because PTY_ITERATION is defined.
4524     AC_DEFINE(FIRST_PTY_LETTER, ['q'])
4525     AC_DEFINE(PTY_OPEN, [ { struct sigaction ocstat, cstat; struct stat stb; char * name; sigemptyset(&cstat.sa_mask); cstat.sa_handler = SIG_DFL; cstat.sa_flags = 0; sigaction(SIGCHLD, &cstat, &ocstat); name = _getpty (&fd, O_RDWR | O_NDELAY, 0600, 0); sigaction(SIGCHLD, &ocstat, (struct sigaction *)0); if (name == 0) return -1; if (fd < 0) return -1; if (fstat (fd, &stb) < 0) return -1; strcpy (pty_name, name); }])
4526     dnl No need to get the pty name at all.
4527     AC_DEFINE(PTY_NAME_SPRINTF, [])
4528     dnl No need to use sprintf to get the tty name--we get that from _getpty.
4529     AC_DEFINE(PTY_TTY_NAME_SPRINTF, [])
4530     ;;
4531
4532   sol2* )
4533     dnl On SysVr4, grantpt(3) forks a subprocess, so do not use
4534     dnl O_CLOEXEC when opening the pty, and keep the SIGCHLD handler
4535     dnl from intercepting that death.  If any child but grantpt's should die
4536     dnl within, it should be caught after sigrelse(2).
4537     AC_DEFINE(PTY_OPEN, [fd = open (pty_name, O_RDWR | O_NONBLOCK)])
4538     AC_DEFINE(PTY_TTY_NAME_SPRINTF, [{ char *ptsname (int), *ptyname; int grantpt_result; sigset_t blocked; sigemptyset (&blocked); sigaddset (&blocked, SIGCHLD); pthread_sigmask (SIG_BLOCK, &blocked, 0); grantpt_result = grantpt (fd); pthread_sigmask (SIG_UNBLOCK, &blocked, 0); if (grantpt_result == -1 || unlockpt (fd) == -1 || !(ptyname = ptsname (fd))) { emacs_close (fd); return -1; } snprintf (pty_name, PTY_NAME_SIZE, "%s", ptyname); }])
4539     ;;
4540
4541   unixware )
4542     dnl Comments are as per sol2*.
4543     AC_DEFINE(PTY_OPEN, [fd = open (pty_name, O_RDWR | O_NONBLOCK)])
4544     AC_DEFINE(PTY_TTY_NAME_SPRINTF, [{ char *ptsname (int), *ptyname; int grantpt_result; sigset_t blocked; sigemptyset (&blocked); sigaddset (&blocked, SIGCHLD); pthread_sigmask (SIG_BLOCK, &blocked, 0); grantpt_result = grantpt (fd); pthread_sigmask (SIG_UNBLOCK, &blocked, 0); if (grantpt_result == -1) fatal("could not grant slave pty"); if (unlockpt(fd) == -1) fatal("could not unlock slave pty"); if (!(ptyname = ptsname(fd))) fatal ("could not enable slave pty"); snprintf (pty_name, PTY_NAME_SIZE, "%s", ptyname); }])
4545     ;;
4546 esac
4547
4548
4549 case $opsys in
4550   sol2* | unixware )
4551     dnl This change means that we don't loop through allocate_pty too
4552     dnl many times in the (rare) event of a failure.
4553     AC_DEFINE(FIRST_PTY_LETTER, ['z'])
4554     AC_DEFINE(PTY_NAME_SPRINTF, [strcpy (pty_name, "/dev/ptmx");])
4555     dnl Push various streams modules onto a PTY channel.  Used in process.c.
4556     AC_DEFINE(SETUP_SLAVE_PTY, [if (ioctl (forkin, I_PUSH, "ptem") == -1) fatal ("ioctl I_PUSH ptem"); if (ioctl (forkin, I_PUSH, "ldterm") == -1) fatal ("ioctl I_PUSH ldterm"); if (ioctl (forkin, I_PUSH, "ttcompat") == -1) fatal ("ioctl I_PUSH ttcompat");], [How to set up a slave PTY, if needed.])
4557     ;;
4558 esac
4559
4560
4561 AH_TEMPLATE(SIGNALS_VIA_CHARACTERS, [Make process_send_signal work by
4562 "typing" a signal character on the pty.])
4563
4564 case $opsys in
4565   dnl Perry Smith <pedz@ddivt1.austin.ibm.com> says this is correct for AIX.
4566   dnl thomas@mathematik.uni-bremen.de says this is needed for IRIX.
4567   aix4-2 | cygwin | gnu | irix6-5 | dragonfly | freebsd | netbsd | openbsd | darwin )
4568     AC_DEFINE(SIGNALS_VIA_CHARACTERS, 1)
4569     ;;
4570
4571   dnl 21 Jun 06: Eric Hanchrow <offby1@blarg.net> says this works.
4572   dnl FIXME Does gnu-kfreebsd have linux/version.h?  It seems unlikely...
4573   gnu-linux | gnu-kfreebsd )
4574
4575     AC_MSG_CHECKING([for signals via characters])
4576     AC_PREPROC_IFELSE([AC_LANG_PROGRAM([[
4577 #include <linux/version.h>
4578 #if LINUX_VERSION_CODE < 0x20400
4579 # error "Linux version too old"
4580 #endif
4581       ]], [[]])], emacs_signals_via_chars=yes, emacs_signals_via_chars=no)
4582
4583     AC_MSG_RESULT([$emacs_signals_via_chars])
4584     test $emacs_signals_via_chars = yes && AC_DEFINE(SIGNALS_VIA_CHARACTERS, 1)
4585     ;;
4586 esac
4587
4588
4589 AH_TEMPLATE(TAB3, [Undocumented.])
4590
4591 case $opsys in
4592   darwin) AC_DEFINE(TAB3, OXTABS) ;;
4593
4594   gnu | dragonfly | freebsd | netbsd | openbsd )
4595     AC_DEFINE(TABDLY, OXTABS, [Undocumented.])
4596     AC_DEFINE(TAB3, OXTABS)
4597     ;;
4598
4599   gnu-linux | gnu-kfreebsd )
4600     AC_PREPROC_IFELSE([AC_LANG_PROGRAM([[
4601 #ifndef __ia64__
4602 # error "not ia64"
4603 #endif
4604       ]], [[]])], AC_DEFINE(GC_MARK_SECONDARY_STACK(),
4605         [do { extern void *__libc_ia64_register_backing_store_base; __builtin_ia64_flushrs (); mark_memory (__libc_ia64_register_backing_store_base, __builtin_ia64_bsp ());} while (false)],
4606         [Mark a secondary stack, like the register stack on the ia64.]), [])
4607     ;;
4608
4609   hpux*)
4610     AC_DEFINE(RUN_TIME_REMAP, 1, [Define if emacs.c needs to call
4611       run_time_remap; for HPUX.])
4612     ;;
4613 esac
4614
4615
4616 dnl This won't be used automatically yet.  We also need to know, at least,
4617 dnl that the stack is continuous.
4618 AH_TEMPLATE(GC_SETJMP_WORKS, [Define if setjmp is known to save all
4619   registers relevant for conservative garbage collection in the jmp_buf.])
4620
4621
4622 case $opsys in
4623   dnl Not all the architectures are tested, but there are Debian packages
4624   dnl for SCM and/or Guile on them, so the technique must work.  See also
4625   dnl comments in alloc.c concerning setjmp and gcc.
4626   dnl Fixme: it's probably safe to just use the GCC conditional below.
4627   gnu-linux | gnu-kfreebsd )
4628     AC_PREPROC_IFELSE([AC_LANG_PROGRAM([[
4629 #if defined __i386__ || defined __sparc__ || defined __mc68000__ \
4630   || defined __alpha__ || defined __mips__ || defined __s390__ \
4631   || defined __arm__ || defined __powerpc__ || defined __amd64__ \
4632   || defined __ia64__ || defined __sh__
4633 /* ok */
4634 #else
4635 # error "setjmp not known to work on this arch"
4636 #endif
4637     ]], [[]])], AC_DEFINE(GC_SETJMP_WORKS, 1))
4638     ;;
4639 esac
4640
4641
4642 if test x$GCC = xyes; then
4643    dnl GC_SETJMP_WORKS is nearly always appropriate for GCC.
4644    AC_DEFINE(GC_SETJMP_WORKS, 1)
4645 else
4646   case $opsys in
4647     dnl irix: Tested on Irix 6.5.  SCM worked on earlier versions.
4648     aix* | dragonfly | freebsd | netbsd | openbsd | irix6-5 | sol2* )
4649       AC_DEFINE(GC_SETJMP_WORKS, 1)
4650       ;;
4651   esac
4652 fi                              dnl GCC?
4653
4654 dnl In a weird quirk, MS runtime uses _setjmp and longjmp.
4655 AC_CACHE_CHECK([for _setjmp], [emacs_cv_func__setjmp],
4656   [AC_LINK_IFELSE(
4657      [AC_LANG_PROGRAM(
4658        [[#include <setjmp.h>
4659          #ifdef __MINGW32__
4660          # define _longjmp longjmp
4661          #endif
4662        ]],
4663        [[jmp_buf j;
4664          if (! _setjmp (j))
4665            _longjmp (j, 1);]])],
4666      [emacs_cv_func__setjmp=yes],
4667      [emacs_cv_func__setjmp=no])])
4668 if test $emacs_cv_func__setjmp = yes; then
4669   AC_DEFINE([HAVE__SETJMP], 1, [Define to 1 if _setjmp and _longjmp work.])
4670 fi
4671
4672 # We need to preserve signal mask to handle C stack overflows.
4673 AC_CACHE_CHECK([for sigsetjmp], [emacs_cv_func_sigsetjmp],
4674   [AC_LINK_IFELSE(
4675      [AC_LANG_PROGRAM(
4676        [[#include <setjmp.h>
4677        ]],
4678        [[sigjmp_buf j;
4679          if (! sigsetjmp (j, 1))
4680            siglongjmp (j, 1);]])],
4681      [emacs_cv_func_sigsetjmp=yes],
4682      [emacs_cv_func_sigsetjmp=no])])
4683 if test $emacs_cv_func_sigsetjmp = yes; then
4684   AC_DEFINE([HAVE_SIGSETJMP], 1,
4685     [Define to 1 if sigsetjmp and siglongjmp work.])
4686 fi
4687
4688 case $emacs_cv_func_sigsetjmp,$emacs_cv_alternate_stack,$opsys in
4689   yes,yes,* | *,*,mingw32)
4690     AC_DEFINE([HAVE_STACK_OVERFLOW_HANDLING], 1,
4691       [Define to 1 if C stack overflow can be handled in some cases.]);;
4692 esac
4693
4694 case $opsys in
4695   sol2* | unixware )
4696     dnl TIOCGPGRP is broken in SysVr4, so we can't send signals to PTY
4697     dnl subprocesses the usual way.  But TIOCSIGNAL does work for PTYs,
4698     dnl and this is all we need.
4699     AC_DEFINE(TIOCSIGSEND, TIOCSIGNAL, [Some platforms redefine this.])
4700     ;;
4701 esac
4702
4703
4704 case $opsys in
4705   hpux* | sol2* )
4706     dnl Used in xfaces.c.
4707     AC_DEFINE(XOS_NEEDS_TIME_H, 1, [Compensate for a bug in Xos.h on
4708       some systems, where it requires time.h.])
4709     ;;
4710 esac
4711
4712
4713 dnl Define symbols to identify the version of Unix this is.
4714 dnl Define all the symbols that apply correctly.
4715 AH_TEMPLATE(DOS_NT, [Define if the system is MS DOS or MS Windows.])
4716 AH_TEMPLATE(MSDOS, [Define if the system is MS DOS.])
4717 AH_TEMPLATE(USG, [Define if the system is compatible with System III.])
4718 AH_TEMPLATE(USG5_4, [Define if the system is compatible with System V Release 4.])
4719
4720 case $opsys in
4721   aix4-2)
4722     AC_DEFINE(USG, [])
4723     dnl This symbol should be defined on AIX Version 3  ???????
4724     AC_PREPROC_IFELSE([AC_LANG_PROGRAM([[
4725 #ifndef _AIX
4726 # error "_AIX not defined"
4727 #endif
4728     ]], [[]])], [], AC_DEFINE(_AIX, [], [Define if the system is AIX.]))
4729     ;;
4730
4731   cygwin)
4732     AC_DEFINE(CYGWIN, 1, [Define if the system is Cygwin.])
4733     ;;
4734
4735   darwin)
4736     dnl Not __APPLE__, as this may not be defined on non-OSX Darwin.
4737     dnl Not DARWIN, because Panther and lower CoreFoundation.h use DARWIN to
4738     dnl distinguish OS X from pure Darwin.
4739     AC_DEFINE(DARWIN_OS, [], [Define if the system is Darwin.])
4740     ;;
4741
4742   gnu-linux | gnu-kfreebsd )
4743     AC_DEFINE(USG, [])
4744     AC_DEFINE(GNU_LINUX, [], [Define if ths system is compatible with GNU/Linux.])
4745     ;;
4746
4747   hpux*)
4748     AC_DEFINE(USG, [])
4749     AC_DEFINE(HPUX, [], [Define if the system is HPUX.])
4750     ;;
4751
4752   irix6-5)
4753     AC_DEFINE(USG, [])
4754     AC_DEFINE(USG5_4, [])
4755     AC_DEFINE(IRIX6_5, [], [Define if the system is IRIX.])
4756     ;;
4757
4758   mingw32)
4759     AC_DEFINE(DOS_NT, [])
4760     AC_DEFINE(WINDOWSNT, 1, [Define if compiling for native MS Windows.])
4761     if test "x$ac_enable_checking" != "x" ; then
4762       AC_DEFINE(EMACSDEBUG, 1, [Define to 1 to enable w32 debug facilities.])
4763     fi
4764     ;;
4765
4766   sol2*)
4767     AC_DEFINE(USG, [])
4768     AC_DEFINE(USG5_4, [])
4769     AC_DEFINE(SOLARIS2, [], [Define if the system is Solaris.])
4770     ;;
4771
4772   unixware)
4773     AC_DEFINE(USG, [])
4774     AC_DEFINE(USG5_4, [])
4775     ;;
4776 esac
4777
4778 AC_CACHE_CHECK([for usable FIONREAD], [emacs_cv_usable_FIONREAD],
4779   [case $opsys in
4780      aix4-2 | nacl)
4781        dnl BUILD 9008 - FIONREAD problem still exists in X-Windows.
4782        emacs_cv_usable_FIONREAD=no
4783        ;;
4784
4785      mingw32)
4786        emacs_cv_usable_FIONREAD=yes
4787        ;;
4788
4789      *)
4790        AC_COMPILE_IFELSE(
4791          [AC_LANG_PROGRAM([[#include <sys/types.h>
4792                             #include <sys/ioctl.h>
4793                             #ifdef USG5_4
4794                             # include <sys/filio.h>
4795                             #endif
4796                           ]],
4797                           [[int foo = ioctl (0, FIONREAD, &foo);]])],
4798          [emacs_cv_usable_FIONREAD=yes],
4799          [emacs_cv_usable_FIONREAD=no])
4800        ;;
4801    esac])
4802 if test $emacs_cv_usable_FIONREAD = yes; then
4803   AC_DEFINE([USABLE_FIONREAD], [1], [Define to 1 if FIONREAD is usable.])
4804
4805   if test $emacs_broken_SIGIO = no; then
4806     AC_CACHE_CHECK([for usable SIGIO], [emacs_cv_usable_SIGIO],
4807       [AC_COMPILE_IFELSE(
4808          [AC_LANG_PROGRAM([[#include <fcntl.h>
4809                             #include <signal.h>
4810                           ]],
4811                           [[int foo = SIGIO | F_SETFL | FASYNC;]])],
4812          [emacs_cv_usable_SIGIO=yes],
4813          [emacs_cv_usable_SIGIO=no])],
4814       [emacs_cv_usable_SIGIO=yes],
4815       [emacs_cv_usable_SIGIO=no])
4816     if test $emacs_cv_usable_SIGIO = yes; then
4817       AC_DEFINE([USABLE_SIGIO], [1], [Define to 1 if SIGIO is usable.])
4818     fi
4819   fi
4820 fi
4821
4822 case $opsys in
4823   hpux11)
4824     dnl It works to open the pty's tty in the parent (Emacs), then
4825     dnl close and reopen it in the child.
4826     AC_DEFINE(USG_SUBTTY_WORKS, 1, [Define for USG systems where it
4827       works to open a pty's tty in the parent process, then close and
4828       reopen it in the child.])
4829     ;;
4830
4831   irix6-5)
4832     AC_DEFINE(PREFER_VSUSP, 1, [Define if process_send_signal should
4833       use VSUSP instead of VSWTCH.])
4834     ;;
4835
4836   sol2-10)
4837     AC_DEFINE(_STRUCTURED_PROC, 1, [Needed for system_process_attributes
4838       on Solaris.])
4839     ;;
4840 esac
4841
4842 # Set up the CFLAGS for real compilation, so we can substitute it.
4843 CFLAGS="$REAL_CFLAGS"
4844 CPPFLAGS="$REAL_CPPFLAGS"
4845 LIBS="$REAL_LIBS"
4846
4847 ## Hack to detect a buggy GCC version.
4848 if test "$GCC" = yes && \
4849    $CC --version 2> /dev/null | grep 'gcc.* 4.5.0' >/dev/null; then
4850   case $CFLAGS in
4851     *-fno-optimize-sibling-calls*) ;;
4852     *-O@<:@23@:>@*)
4853       AC_MSG_ERROR([GCC 4.5.0 has problems compiling Emacs; see etc/PROBLEMS.]);;
4854   esac
4855 fi
4856
4857 version=$PACKAGE_VERSION
4858
4859 copyright="Copyright (C) 2016 Free Software Foundation, Inc."
4860 AC_DEFINE_UNQUOTED(COPYRIGHT, ["$copyright"],
4861   [Short copyright string for this version of Emacs.])
4862 AC_SUBST(copyright)
4863
4864 ### Specify what sort of things we'll be editing into Makefile and config.h.
4865 ### Use configuration here uncanonicalized to avoid exceeding size limits.
4866 AC_SUBST(version)
4867 AC_SUBST(configuration)
4868 ## Unused?
4869 AC_SUBST(canonical)
4870 AC_SUBST(srcdir)
4871 AC_SUBST(prefix)
4872 AC_SUBST(exec_prefix)
4873 AC_SUBST(bindir)
4874 AC_SUBST(datadir)
4875 AC_SUBST(sharedstatedir)
4876 AC_SUBST(libexecdir)
4877 AC_SUBST(mandir)
4878 AC_SUBST(infodir)
4879 AC_SUBST(lispdir)
4880 AC_SUBST(standardlisppath)
4881 AC_SUBST(locallisppath)
4882 AC_SUBST(lisppath)
4883 AC_SUBST(x_default_search_path)
4884 AC_SUBST(etcdir)
4885 AC_SUBST(archlibdir)
4886 AC_SUBST(etcdocdir)
4887 AC_SUBST(bitmapdir)
4888 AC_SUBST(gamedir)
4889 AC_SUBST(gameuser)
4890 AC_SUBST(gamegroup)
4891 ## FIXME? Nothing uses @LD_SWITCH_X_SITE@.
4892 ## src/Makefile.in did add LD_SWITCH_X_SITE (as a cpp define) to the
4893 ## end of LIBX_BASE, but nothing ever set it.
4894 AC_SUBST(LD_SWITCH_X_SITE)
4895 AC_SUBST(C_SWITCH_X_SITE)
4896 AC_SUBST(GNUSTEP_CFLAGS)
4897 AC_SUBST(CFLAGS)
4898 ## Used in lwlib/Makefile.in.
4899 AC_SUBST(X_TOOLKIT_TYPE)
4900 AC_SUBST(ns_appdir)
4901 AC_SUBST(ns_appbindir)
4902 AC_SUBST(ns_appresdir)
4903 AC_SUBST(ns_appsrc)
4904 AC_SUBST(GNU_OBJC_CFLAGS)
4905 AC_SUBST(OTHER_FILES)
4906
4907 if test -n "${term_header}"; then
4908     AC_DEFINE_UNQUOTED(TERM_HEADER, "${term_header}",
4909         [Define to the header for the built-in window system.])
4910 fi
4911
4912 AC_DEFINE_UNQUOTED(EMACS_CONFIGURATION,  "${canonical}",
4913                    [Define to the canonical Emacs configuration name.])
4914 AC_DEFINE_UNQUOTED(EMACS_CONFIG_OPTIONS, "${emacs_config_options}",
4915                    [Define to the options passed to configure.])
4916 AH_TEMPLATE(config_opsysfile, [Some platforms that do not use configure
4917   define this to include extra configuration information.])
4918
4919 case $opsys in
4920   mingw32)
4921     AC_DEFINE(config_opsysfile, <ms-w32.h>, [])
4922     ;;
4923 esac
4924
4925 XMENU_OBJ=
4926 XOBJ=
4927 FONT_OBJ=
4928 if test "${HAVE_X_WINDOWS}" = "yes" ; then
4929   AC_DEFINE(HAVE_X_WINDOWS, 1,
4930             [Define to 1 if you want to use the X window system.])
4931   XMENU_OBJ=xmenu.o
4932   XOBJ="xterm.o xfns.o xselect.o xrdb.o xsmfns.o xsettings.o"
4933   FONT_OBJ=xfont.o
4934   if test "$HAVE_CAIRO" = "yes"; then
4935     FONT_OBJ="ftfont.o ftcrfont.o"
4936   elif test "$HAVE_XFT" = "yes"; then
4937     FONT_OBJ="$FONT_OBJ ftfont.o xftfont.o ftxfont.o"
4938   elif test "$HAVE_FREETYPE" = "yes"; then
4939     FONT_OBJ="$FONT_OBJ ftfont.o ftxfont.o"
4940   fi
4941   AC_SUBST(FONT_OBJ)
4942 fi
4943 AC_SUBST(XMENU_OBJ)
4944 AC_SUBST(XOBJ)
4945 AC_SUBST(FONT_OBJ)
4946
4947 WIDGET_OBJ=
4948 MOTIF_LIBW=
4949 if test "${USE_X_TOOLKIT}" != "none" ; then
4950   WIDGET_OBJ=widget.o
4951   AC_DEFINE(USE_X_TOOLKIT, 1, [Define to 1 if using an X toolkit.])
4952   if test "${USE_X_TOOLKIT}" = "LUCID"; then
4953     AC_DEFINE(USE_LUCID, 1, [Define to 1 if using the Lucid X toolkit.])
4954   elif test "${USE_X_TOOLKIT}" = "MOTIF"; then
4955     AC_DEFINE(USE_MOTIF, 1, [Define to 1 if using the Motif X toolkit.])
4956     MOTIF_LIBW=-lXm
4957     case "$opsys" in
4958       gnu-linux)
4959         ## Paul Abrahams <abrahams at equinox.shaysnet.com> says this is needed.
4960         MOTIF_LIBW="$MOTIF_LIBW -lXpm"
4961         ;;
4962
4963       unixware)
4964         ## Richard Anthony Ryan <ryanr at ellingtn.ftc.nrcs.usda.gov>
4965         ## says -lXimp is needed in UNIX_SV ... 4.2 1.1.2.
4966         MOTIF_LIBW="MOTIF_LIBW -lXimp"
4967         ;;
4968
4969       aix4-2)
4970         ## olson@mcs.anl.gov says -li18n is needed by -lXm.
4971         MOTIF_LIBW="$MOTIF_LIBW -li18n"
4972         ;;
4973     esac
4974     MOTIF_LIBW="$MOTIF_LIBW $LIBXP"
4975   fi
4976 fi
4977 AC_SUBST(WIDGET_OBJ)
4978
4979 TOOLKIT_LIBW=
4980 case "$USE_X_TOOLKIT" in
4981   MOTIF) TOOLKIT_LIBW="$MOTIF_LIBW" ;;
4982   LUCID) TOOLKIT_LIBW="$LUCID_LIBW" ;;
4983   none) test "x$HAVE_GTK" = "xyes" && TOOLKIT_LIBW="$GTK_LIBS" ;;
4984 esac
4985 if test "$HAVE_XWIDGETS" = "yes"; then
4986   TOOLKIT_LIBW="$TOOLKIT_LIBW -lXcomposite"
4987 fi
4988 AC_SUBST(TOOLKIT_LIBW)
4989
4990 if test "${opsys}" != "mingw32"; then
4991   if test "$USE_X_TOOLKIT" = "none"; then
4992     LIBXT_OTHER="\$(LIBXSM)"
4993   else
4994     LIBXT_OTHER="\$(LIBXMU) -lXt \$(LIBXTR6) -lXext"
4995   fi
4996 fi
4997 AC_SUBST(LIBXT_OTHER)
4998
4999 if test "${HAVE_X11}" = "yes" ; then
5000   AC_DEFINE(HAVE_X11, 1,
5001             [Define to 1 if you want to use version 11 of X windows.])
5002   LIBX_OTHER="\$(LIBXT) \$(LIBX_EXTRA)"
5003 else
5004   LIBX_OTHER=
5005 fi
5006 AC_SUBST(LIBX_OTHER)
5007
5008 if test "$HAVE_GTK" = yes || test "$HAVE_X11" != yes; then
5009   LIBXMENU=
5010 elif test "$USE_X_TOOLKIT" = none; then
5011   LIBXMENU='$(oldXMenudir)/libXMenu11.a'
5012 else
5013   LIBXMENU='$(lwlibdir)/liblw.a'
5014 fi
5015 AC_SUBST(LIBXMENU)
5016
5017 AC_CACHE_CHECK([for struct alignment],
5018   [emacs_cv_struct_alignment],
5019   [AC_COMPILE_IFELSE(
5020      [AC_LANG_PROGRAM([[#include <stddef.h>
5021                         struct __attribute__ ((aligned (8))) s { char c; };
5022                         struct t { char c; struct s s; };
5023                         char verify[offsetof (struct t, s) == 8 ? 1 : -1];
5024                       ]])],
5025      [emacs_cv_struct_alignment=yes],
5026      [emacs_cv_struct_alignment=no])])
5027 if test "$emacs_cv_struct_alignment" = yes; then
5028   AC_DEFINE([HAVE_STRUCT_ATTRIBUTE_ALIGNED], 1,
5029     [Define to 1 if 'struct __attribute__ ((aligned (N)))' aligns the
5030      structure to an N-byte boundary.])
5031 fi
5032
5033 if test "${GNU_MALLOC}" = "yes" ; then
5034   AC_DEFINE(GNU_MALLOC, 1,
5035             [Define to 1 if you want to use the GNU memory allocator.])
5036 fi
5037
5038 RALLOC_OBJ=
5039 if test "${REL_ALLOC}" = "yes" ; then
5040   AC_DEFINE(REL_ALLOC, 1,
5041             [Define REL_ALLOC if you want to use the relocating allocator for
5042              buffer space.])
5043
5044   test "$system_malloc" != "yes" && RALLOC_OBJ=ralloc.o
5045 fi
5046 AC_SUBST(RALLOC_OBJ)
5047
5048 if test "$opsys" = "cygwin"; then
5049   CYGWIN_OBJ="cygw32.o"
5050   ## Cygwin differs because of its unexec().
5051   PRE_ALLOC_OBJ=
5052   POST_ALLOC_OBJ=lastfile.o
5053 elif test "$opsys" = "mingw32"; then
5054   CYGWIN_OBJ=
5055   PRE_ALLOC_OBJ=
5056   POST_ALLOC_OBJ=lastfile.o
5057 else
5058   CYGWIN_OBJ=
5059   PRE_ALLOC_OBJ=lastfile.o
5060   POST_ALLOC_OBJ=
5061 fi
5062 AC_SUBST(CYGWIN_OBJ)
5063 AC_SUBST(PRE_ALLOC_OBJ)
5064 AC_SUBST(POST_ALLOC_OBJ)
5065
5066 dnl Call this 'FORTIFY_SOUR' so that it sorts before the 'FORTIFY_SOURCE'
5067 dnl verbatim defined above.  The tricky name is apropos, as this hack
5068 dnl makes Fortify go sour!
5069 AH_VERBATIM([FORTIFY_SOUR],
5070 [/* Without the following workaround, Emacs runs slowly on OS X 10.8.
5071    The workaround disables some useful run-time checking, so it
5072    should be conditional to the platforms with the performance bug.
5073    Perhaps Apple will fix this some day; also see m4/extern-inline.m4.  */
5074 #if defined __APPLE__ && defined __GNUC__
5075 # ifndef _DONT_USE_CTYPE_INLINE_
5076 #  define _DONT_USE_CTYPE_INLINE_
5077 # endif
5078 # ifndef _FORTIFY_SOURCE
5079 #  define _FORTIFY_SOURCE 0
5080 # endif
5081 #endif
5082 ])
5083
5084 # If user asks to omit features, disable optional features that gnulib
5085 # might otherwise enable.
5086 if test "$with_features" = no && test "$enable_acl" != yes; then
5087   enable_acl=no
5088 fi
5089
5090 # Configure gnulib.  Although this does not affect CFLAGS or LIBS permanently.
5091 # it temporarily reverts them to their pre-pkg-config values,
5092 # because gnulib needs to work with both src (which uses the
5093 # pkg-config stuff) and lib-src (which does not).  For example, gnulib
5094 # may need to determine whether LIB_CLOCK_GETTIME should contain -lrt,
5095 # and it therefore needs to run in an environment where LIBS does not
5096 # already contain -lrt merely because 'pkg-config --libs' printed '-lrt'
5097 # for some package unrelated to lib-src.
5098 SAVE_CFLAGS=$CFLAGS
5099 SAVE_LIBS=$LIBS
5100 CFLAGS=$pre_PKG_CONFIG_CFLAGS
5101 LIBS="$LIB_PTHREAD $pre_PKG_CONFIG_LIBS"
5102 gl_ASSERT_NO_GNULIB_POSIXCHECK
5103 gl_ASSERT_NO_GNULIB_TESTS
5104 gl_INIT
5105 CFLAGS=$SAVE_CFLAGS
5106 LIBS=$SAVE_LIBS
5107
5108 if test "${opsys}" = "mingw32"; then
5109   CPPFLAGS="$CPPFLAGS -DUSE_CRT_DLL=1 -I \${abs_top_srcdir}/nt/inc"
5110   # Remove unneeded switches from the value of CC that goes to Makefiles
5111   CC=`AS_ECHO(["$CC"]) | sed -e "s,$GCC_TEST_OPTIONS,,"`
5112 fi
5113
5114 case "$opsys" in
5115   aix4-2) LD_SWITCH_SYSTEM_TEMACS="-Wl,-bnodelcsect" ;;
5116
5117   cygwin) LD_SWITCH_SYSTEM_TEMACS="-Wl,-stack,0x00800000" ;;
5118
5119   darwin)
5120    ## The -headerpad option tells ld (see man page) to leave room at the
5121    ## end of the header for adding load commands.  Needed for dumping.
5122    ## 0x1000 is enough for roughly 52 load commands on the x86_64
5123    ## architecture (where they are 78 bytes each). The actual number of
5124    ## load commands added is not consistent but normally ranges from
5125    ## about 14 to about 34. Setting it high gets us plenty of slop and
5126    ## only costs about 1.5K of wasted binary space.
5127    headerpad_extra=1000
5128    if test "$HAVE_NS" = "yes"; then
5129      libs_nsgui="-framework AppKit"
5130      if test "$NS_IMPL_COCOA" = "yes"; then
5131         libs_nsgui="$libs_nsgui -framework IOKit"
5132      fi
5133    else
5134      libs_nsgui=
5135    fi
5136    LD_SWITCH_SYSTEM_TEMACS="-fno-pie -prebind $libs_nsgui -Xlinker -headerpad -Xlinker $headerpad_extra"
5137
5138    ## This is here because src/Makefile.in did some extra fiddling around
5139    ## with LD_SWITCH_SYSTEM.  It seems cleaner to put this in
5140    ## LD_SWITCH_SYSTEM_TEMACS instead,
5141    test "x$LD_SWITCH_SYSTEM" = "x" && test "x$GCC" != "xyes" && \
5142      LD_SWITCH_SYSTEM_TEMACS="-X $LD_SWITCH_SYSTEM_TEMACS"
5143    ;;
5144
5145   ## LD_SWITCH_X_SITE_RPATH is a -rpath option saying where to
5146   ## find X at run-time.
5147   ## When handled by cpp, this was in LD_SWITCH_SYSTEM.  However, at the
5148   ## point where configure sourced the s/*.h file, LD_SWITCH_X_SITE_RPATH
5149   ## had not yet been defined and was expanded to null.  Hence LD_SWITCH_SYSTEM
5150   ## had different values in configure (in ac_link) and src/Makefile.in.
5151   ## It seems clearer therefore to put this piece in LD_SWITCH_SYSTEM_TEMACS.
5152   gnu*) LD_SWITCH_SYSTEM_TEMACS="\$(LD_SWITCH_X_SITE_RPATH)" ;;
5153
5154   mingw32)
5155    ## Is it any better under MinGW64 to relocate emacs into higher addresses?
5156    case "$canonical" in
5157      x86_64-*-*) LD_SWITCH_SYSTEM_TEMACS="-Wl,-stack,0x00800000 -Wl,-heap,0x00100000 -Wl,-image-base,0x400000000 -Wl,-entry,__start -Wl,-Map,./temacs.map" ;;
5158      *) LD_SWITCH_SYSTEM_TEMACS="-Wl,-stack,0x00800000 -Wl,-heap,0x00100000 -Wl,-image-base,0x01000000 -Wl,-entry,__start -Wl,-Map,./temacs.map" ;;
5159    esac
5160    ;;
5161
5162   *) LD_SWITCH_SYSTEM_TEMACS= ;;
5163 esac
5164
5165 # -nopie fixes a temacs segfault on Gentoo, OpenBSD, and other systems
5166 # with "hardened" GCC configurations for some reason (Bug#18784).
5167 # We don't know why -nopie works, but not segfaulting is better than
5168 # segfaulting.  Use ac_c_werror_flag=yes when trying -nopie, otherwise
5169 # clang keeps warning that it does not understand -nopie, and pre-4.6
5170 # GCC has a similar problem (Bug#20338).
5171 AC_CACHE_CHECK([whether $CC accepts -nopie],
5172   [emacs_cv_prog_cc_nopie],
5173   [emacs_save_c_werror_flag=$ac_c_werror_flag
5174    emacs_save_LDFLAGS=$LDFLAGS
5175    ac_c_werror_flag=yes
5176    LDFLAGS="$LDFLAGS -nopie"
5177    AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])],
5178      [emacs_cv_prog_cc_nopie=yes],
5179      [emacs_cv_prog_cc_nopie=no])
5180    ac_c_werror_flag=$emacs_save_c_werror_flag
5181    LDFLAGS=$emacs_save_LDFLAGS])
5182 if test "$emacs_cv_prog_cc_nopie" = yes; then
5183   LD_SWITCH_SYSTEM_TEMACS="$LD_SWITCH_SYSTEM_TEMACS -nopie"
5184 fi
5185
5186 if test x$ac_enable_profiling != x ; then
5187   case $opsys in
5188     *freebsd | gnu-linux) ;;
5189     *) LD_SWITCH_SYSTEM_TEMACS="$LD_SWITCH_SYSTEM_TEMACS -pg" ;;
5190   esac
5191 fi
5192
5193 LD_SWITCH_SYSTEM_TEMACS="$LDFLAGS_NOCOMBRELOC $LD_SWITCH_SYSTEM_TEMACS"
5194
5195 AC_SUBST(LD_SWITCH_SYSTEM_TEMACS)
5196
5197 ## Common for all window systems
5198 if test "$window_system" != "none"; then
5199   AC_DEFINE(HAVE_WINDOW_SYSTEM, 1, [Define if you have a window system.])
5200   AC_DEFINE(POLL_FOR_INPUT, 1, [Define if you poll periodically to detect C-g.])
5201   WINDOW_SYSTEM_OBJ="fontset.o fringe.o image.o"
5202 fi
5203
5204 AC_SUBST(WINDOW_SYSTEM_OBJ)
5205
5206 AH_TOP([/* GNU Emacs site configuration template file.
5207
5208 Copyright (C) 1988, 1993-1994, 1999-2002, 2004-2016
5209   Free Software Foundation, Inc.
5210
5211 This file is part of GNU Emacs.
5212
5213 GNU Emacs is free software: you can redistribute it and/or modify
5214 it under the terms of the GNU General Public License as published by
5215 the Free Software Foundation, either version 3 of the License, or
5216 (at your option) any later version.
5217
5218 GNU Emacs is distributed in the hope that it will be useful,
5219 but WITHOUT ANY WARRANTY; without even the implied warranty of
5220 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
5221 GNU General Public License for more details.
5222
5223 You should have received a copy of the GNU General Public License
5224 along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
5225
5226
5227 /* No code in Emacs #includes config.h twice, but some bits of code
5228    intended to work with other packages as well (like gmalloc.c)
5229    think they can include it as many times as they like.  */
5230 #ifndef EMACS_CONFIG_H
5231 #define EMACS_CONFIG_H
5232 ])dnl
5233
5234 AH_BOTTOM([#include <conf_post.h>
5235
5236 #endif /* EMACS_CONFIG_H */
5237
5238 /*
5239 Local Variables:
5240 mode: c
5241 End:
5242 */
5243 ])dnl
5244
5245 #### Report on what we decided to do.
5246 #### Report GTK as a toolkit, even if it doesn't use Xt.
5247 #### It makes printing result more understandable as using GTK sets
5248 #### toolkit_scroll_bars to yes by default.
5249 if test "${HAVE_GTK}" = "yes"; then
5250   USE_X_TOOLKIT="$USE_GTK_TOOLKIT"
5251 fi
5252
5253 if test $USE_ACL -ne 0; then
5254   ACL_SUMMARY="yes $LIB_ACL"
5255 else
5256   ACL_SUMMARY=no
5257 fi
5258
5259 emacs_standard_dirs='Standard dirs'
5260 AS_ECHO(["
5261 Configured for '${canonical}'.
5262
5263   Where should the build process find the source code?    ${srcdir}
5264   What compiler should emacs be built with?               ${CC} ${CFLAGS}
5265   Should Emacs use the GNU version of malloc?             ${GNU_MALLOC}${GNU_MALLOC_reason}
5266   Should Emacs use a relocating allocator for buffers?    ${REL_ALLOC}
5267   Should Emacs use mmap(2) for buffer allocation?         $use_mmap_for_buffers
5268   What window system should Emacs use?                    ${window_system}
5269   What toolkit should Emacs use?                          ${USE_X_TOOLKIT}
5270   Where do we find X Windows header files?                ${x_includes:-$emacs_standard_dirs}
5271   Where do we find X Windows libraries?                   ${x_libraries:-$emacs_standard_dirs}"])
5272
5273 optsep=
5274 emacs_config_features=
5275 for opt in XAW3D XPM JPEG TIFF GIF PNG RSVG CAIRO IMAGEMAGICK SOUND GPM DBUS \
5276   GCONF GSETTINGS NOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE M17N_FLT \
5277   LIBOTF XFT ZLIB TOOLKIT_SCROLL_BARS X_TOOLKIT X11 NS MODULES \
5278   XWIDGETS; do
5279
5280     case $opt in
5281       NOTIFY|ACL) eval val=\${${opt}_SUMMARY} ;;
5282       TOOLKIT_SCROLL_BARS|X_TOOLKIT) eval val=\${USE_$opt} ;;
5283       *) eval val=\${HAVE_$opt} ;;
5284     esac
5285     case x$val in
5286       xno|xnone|x) continue ;;
5287     esac
5288     case $opt in
5289       X_TOOLKIT)
5290         case $val in
5291           GTK*|LUCID|MOTIF) opt=$val ;;
5292           *) continue ;;
5293         esac
5294       ;;
5295     esac
5296     AS_VAR_APPEND([emacs_config_features], ["$optsep$opt"])
5297     optsep=' '
5298 done
5299 AC_DEFINE_UNQUOTED(EMACS_CONFIG_FEATURES, "${emacs_config_features}",
5300   [Summary of some of the main features enabled by configure.])
5301
5302 AS_ECHO(["  Does Emacs use -lXaw3d?                                 ${HAVE_XAW3D}
5303   Does Emacs use -lXpm?                                   ${HAVE_XPM}
5304   Does Emacs use -ljpeg?                                  ${HAVE_JPEG}
5305   Does Emacs use -ltiff?                                  ${HAVE_TIFF}
5306   Does Emacs use a gif library?                           ${HAVE_GIF} $LIBGIF
5307   Does Emacs use a png library?                           ${HAVE_PNG} $LIBPNG
5308   Does Emacs use -lrsvg-2?                                ${HAVE_RSVG}
5309   Does Emacs use cairo?                                   ${HAVE_CAIRO}
5310   Does Emacs use imagemagick?                             ${HAVE_IMAGEMAGICK}
5311   Does Emacs support sound?                               ${HAVE_SOUND}
5312   Does Emacs use -lgpm?                                   ${HAVE_GPM}
5313   Does Emacs use -ldbus?                                  ${HAVE_DBUS}
5314   Does Emacs use -lgconf?                                 ${HAVE_GCONF}
5315   Does Emacs use GSettings?                               ${HAVE_GSETTINGS}
5316   Does Emacs use a file notification library?             ${NOTIFY_SUMMARY}
5317   Does Emacs use access control lists?                    ${ACL_SUMMARY}
5318   Does Emacs use -lselinux?                               ${HAVE_LIBSELINUX}
5319   Does Emacs use -lgnutls?                                ${HAVE_GNUTLS}
5320   Does Emacs use -lxml2?                                  ${HAVE_LIBXML2}
5321   Does Emacs use -lfreetype?                              ${HAVE_FREETYPE}
5322   Does Emacs use -lm17n-flt?                              ${HAVE_M17N_FLT}
5323   Does Emacs use -lotf?                                   ${HAVE_LIBOTF}
5324   Does Emacs use -lxft?                                   ${HAVE_XFT}
5325   Does Emacs directly use zlib?                           ${HAVE_ZLIB}
5326   Does Emacs have dynamic modules support?                ${HAVE_MODULES}
5327   Does Emacs use toolkit scroll bars?                     ${USE_TOOLKIT_SCROLL_BARS}
5328   Does Emacs support Xwidgets (requires gtk3)?            ${HAVE_XWIDGETS}
5329 "])
5330
5331 if test -n "${EMACSDATA}"; then
5332    AS_ECHO(["  Environment variable EMACSDATA set to:                  $EMACSDATA"])
5333 fi
5334 if test -n "${EMACSDOC}"; then
5335    AS_ECHO(["  Environment variable EMACSDOC set to:                   $EMACSDOC"])
5336 fi
5337
5338 echo
5339
5340 if test "$HAVE_NS" = "yes"; then
5341    echo
5342    AS_ECHO(["You must run \"${MAKE-make} install\" in order to test the built application.
5343 The installed application will go to nextstep/Emacs.app and can be
5344 run or moved from there."])
5345    if test "$EN_NS_SELF_CONTAINED" = "yes"; then
5346       echo "The application will be fully self-contained."
5347     else
5348       AS_ECHO(["The lisp resources for the application will be installed under ${prefix}.
5349 You may need to run \"${MAKE-make} install\" with sudo.  The application will fail
5350 to run if these resources are not installed."])
5351    fi
5352    echo
5353 fi
5354
5355 if test "${opsys}" = "cygwin"; then
5356   case `uname -r` in
5357     1.5.*) AC_MSG_WARN([[building Emacs on Cygwin 1.5 is not supported.]])
5358            echo
5359            ;;
5360   esac
5361 fi
5362
5363 # Remove any trailing slashes in these variables.
5364 case $prefix in
5365   */) prefix=`AS_DIRNAME(["$prefix."])`;;
5366 esac
5367 case $exec_prefix in
5368   */) exec_prefix=`AS_DIRNAME(["$exec_prefix."])`;;
5369 esac
5370
5371 if test "$HAVE_NS" = "yes"; then
5372   if test "$NS_IMPL_GNUSTEP" = yes; then
5373     AC_CONFIG_FILES([nextstep/GNUstep/Emacs.base/Resources/Info-gnustep.plist:nextstep/templates/Info-gnustep.plist.in \
5374       nextstep/GNUstep/Emacs.base/Resources/Emacs.desktop:nextstep/templates/Emacs.desktop.in])
5375     ns_check_file=Resources/Info-gnustep.plist
5376   else
5377     AC_CONFIG_FILES([nextstep/Cocoa/Emacs.base/Contents/Info.plist:nextstep/templates/Info.plist.in \
5378       nextstep/Cocoa/Emacs.base/Contents/Resources/English.lproj/InfoPlist.strings:nextstep/templates/InfoPlist.strings.in])
5379     ns_check_file=Contents/Info.plist
5380   fi
5381   AC_SUBST(ns_check_file)
5382 fi
5383
5384 dnl config.status treats $srcdir specially, so I think this is ok...
5385 AC_CONFIG_FILES([$srcdir/doc/man/emacs.1])
5386
5387 dnl Obviously there is duplication here wrt $SUBDIR_MAKEFILES.
5388 dnl You _can_ use that variable in AC_CONFIG_FILES, so long as any directory
5389 dnl using automake (ie lib/) is explicitly listed and not "hidden" in a variable
5390 dnl (else you get "no 'Makefile.am' found for any configure output").
5391 dnl This will work, but you get a config.status that is not quite right
5392 dnl (see http://lists.gnu.org/archive/html/bug-autoconf/2008-08/msg00028.html).
5393 dnl That doesn't have any obvious consequences for Emacs, but on the whole
5394 dnl it seems better to just live with the duplication.
5395 SUBDIR_MAKEFILES="lib/Makefile lib-src/Makefile oldXMenu/Makefile doc/emacs/Makefile doc/misc/Makefile doc/lispintro/Makefile doc/lispref/Makefile src/Makefile lwlib/Makefile lisp/Makefile leim/Makefile nextstep/Makefile nt/Makefile"
5396
5397 AC_CONFIG_FILES([Makefile lib/Makefile lib-src/Makefile oldXMenu/Makefile \
5398        doc/emacs/Makefile doc/misc/Makefile doc/lispintro/Makefile \
5399        doc/lispref/Makefile src/Makefile lwlib/Makefile lisp/Makefile \
5400        leim/Makefile nextstep/Makefile nt/Makefile])
5401
5402 dnl test/ is not present in release tarfiles.
5403 opt_makefile=test/Makefile
5404
5405 if test -f "$srcdir/$opt_makefile.in"; then
5406   SUBDIR_MAKEFILES="$SUBDIR_MAKEFILES $opt_makefile"
5407   dnl Again, it's best not to use a variable.  Though you can add
5408   dnl ", [], [opt_makefile='$opt_makefile']" and it should work.
5409   AC_CONFIG_FILES([test/Makefile])
5410 fi
5411
5412
5413 dnl The admin/ directory used to be excluded from tarfiles.
5414 if test -d $srcdir/admin; then
5415   SUBDIR_MAKEFILES="$SUBDIR_MAKEFILES admin/charsets/Makefile admin/unidata/Makefile admin/grammars/Makefile"
5416   AC_CONFIG_FILES([admin/charsets/Makefile])
5417   AC_CONFIG_FILES([admin/unidata/Makefile])
5418   AC_CONFIG_FILES([admin/grammars/Makefile])
5419 fi                              dnl -d admin
5420
5421
5422 SUBDIR_MAKEFILES_IN=`echo " ${SUBDIR_MAKEFILES}" | sed -e 's| | $(srcdir)/|g' -e 's|Makefile|Makefile.in|g'`
5423
5424 AC_SUBST(SUBDIR_MAKEFILES_IN)
5425
5426 dnl You might wonder (I did) why epaths.h is generated by running make,
5427 dnl rather than just letting configure generate it from epaths.in.
5428 dnl One reason is that the various paths are not fully expanded (see above);
5429 dnl eg gamedir=${prefix}/var/games/emacs.
5430 dnl Secondly, the GNU Coding standards require that one should be able
5431 dnl to run 'make prefix=/some/where/else' and override the values set
5432 dnl by configure.  This also explains the 'move-if-change' test and
5433 dnl the use of force in the 'epaths-force' rule in Makefile.in.
5434 AC_CONFIG_COMMANDS([src/epaths.h], [
5435 if test "${opsys}" = "mingw32"; then
5436   ${MAKE-make} MAKEFILE_NAME=do-not-make-Makefile epaths-force-w32
5437 else
5438   ${MAKE-make} MAKEFILE_NAME=do-not-make-Makefile epaths-force
5439 fi || AC_MSG_ERROR(['src/epaths.h' could not be made.])
5440 ], [GCC="$GCC" CPPFLAGS="$CPPFLAGS" opsys="$opsys"])
5441
5442 dnl NB we have to cheat and use the ac_... version because abs_top_srcdir
5443 dnl is not yet set, sigh.  Or we could use ../$srcdir/src/.gdbinit,
5444 dnl or a symlink?
5445 AC_CONFIG_COMMANDS([src/.gdbinit], [
5446 if test ! -f src/.gdbinit && test -f "$srcdir/src/.gdbinit"; then
5447   AS_ECHO(["source $ac_abs_top_srcdir/src/.gdbinit"]) > src/.gdbinit
5448 fi
5449 ])
5450
5451 dnl Perhaps this would be better named doc-emacs-emacsver.texi?
5452 dnl See comments for etc-refcards-emacsver.tex.
5453 dnl Since we get a doc/emacs directory generated anyway, for the Makefile,
5454 dnl it is not quite the same.  But we are generating in $srcdir.
5455 AC_CONFIG_COMMANDS([doc/emacs/emacsver.texi], [
5456 ${MAKE-make} -s --no-print-directory -C doc/emacs doc-emacsver || \
5457 AC_MSG_ERROR(['doc/emacs/emacsver.texi' could not be made.])
5458 ])
5459
5460 dnl If we give this the more natural name, etc/refcards/emacsver.texi,
5461 dnl then a directory etc/refcards is created in the build directory,
5462 dnl which is probably harmless, but confusing (in out-of-tree builds).
5463 dnl (If we were to generate etc/refcards/Makefile, this might change.)
5464 dnl It is really $srcdir/etc/refcards/emacsver.tex that we generate.
5465 AC_CONFIG_COMMANDS([etc-refcards-emacsver.tex], [
5466 ${MAKE-make} -s MAKEFILE_NAME=do-not-make-Makefile etc-emacsver || \
5467 AC_MSG_ERROR(['etc/refcards/emacsver.tex' could not be made.])
5468 ])
5469
5470 AC_OUTPUT
5471
5472 test "$MAKE" = make || AC_MSG_NOTICE([Now you can run '$MAKE'.])