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, 1999-2015 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, 25.0.50, 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 ${1+"$@"} 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])
 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, gfile, inotify, w32, no)])],
 360  [ case "${withval}" in
 361     y | ye | yes )      val=yes ;;
 362     n | no )            val=no  ;;
 363     g | gf | gfi | gfil | gfile )       val=gfile ;;
 364     i | in | ino | inot | inoti | inotif | inotify )    val=inotify ;;
 365     w | w3 | w32 )      val=w32 ;;
 366     * ) AC_MSG_ERROR(['--with-file-notification=$withval' is invalid;
 367 this option's value should be 'yes', 'no', 'gfile', 'inotify' or 'w32'.
 368 'yes' is a synonym for 'w32' on MS-Windows, for 'no' on Nextstep,
 369 otherwise for the first of 'inotify' or 'gfile' that is usable.])
 370     ;;
 371    esac
 372    with_file_notification=$val
 373  ],
 374  [with_file_notification=$with_features])
 375
 376 ## For the times when you want to build Emacs but don't have
 377 ## a suitable makeinfo, and can live without the manuals.
 378 dnl http://lists.gnu.org/archive/html/emacs-devel/2008-04/msg01844.html
 379 OPTION_DEFAULT_ON([makeinfo],[don't require makeinfo for building manuals])
 380
 381 ## This might be a 'configure' arg.
 382 AC_SUBST([ACLOCAL_PATH])
 383
 384 ## Makefile.in needs the cache file name.
 385 AC_SUBST(cache_file)
 386
 387 ## This is an option because I do not know if all info/man support
 388 ## compressed files, nor how to test if they do so.
 389 OPTION_DEFAULT_ON([compress-install],
 390   [don't compress some files (.el, .info, etc.) when installing.  Equivalent to:
 391 make GZIP_PROG= install])
 392
 393 AC_ARG_WITH(gameuser,dnl
 394 [AS_HELP_STRING([--with-gameuser=USER_OR_GROUP],
 395                 [user for shared game score files.
 396                 An argument prefixed by ':' specifies a group instead.])])
 397 gameuser=
 398 gamegroup=
 399 # We don't test if we can actually chown/chgrp here, because configure
 400 # may run without root privileges.  lib-src/Makefile.in will handle
 401 # any errors due to missing user/group gracefully.
 402 case ${with_gameuser} in
 403   no) ;;
 404   "" | yes) gamegroup=games ;;
 405   :*) gamegroup=${with_gameuser#:} ;;
 406   *) gameuser=${with_gameuser} ;;
 407 esac
 408
 409 AC_ARG_WITH([gnustep-conf],dnl
 410 [AS_HELP_STRING([--with-gnustep-conf=FILENAME],
 411    [name of GNUstep configuration file to use on systems where the command
 412     'gnustep-config' does not work; default $GNUSTEP_CONFIG_FILE, or
 413     /etc/GNUstep/GNUstep.conf])])
 414 test "X${with_gnustep_conf}" != X && test "${with_gnustep_conf}" != yes && \
 415   GNUSTEP_CONFIG_FILE="${with_gnustep_conf}"
 416 test "X$GNUSTEP_CONFIG_FILE" = "X" && \
 417      GNUSTEP_CONFIG_FILE=/etc/GNUstep/GNUstep.conf
 418
 419 AC_ARG_ENABLE(ns-self-contained,
 420 [AS_HELP_STRING([--disable-ns-self-contained],
 421                 [disable self contained build under NeXTstep])],
 422    EN_NS_SELF_CONTAINED=$enableval,
 423    EN_NS_SELF_CONTAINED=yes)
 424
 425 locallisppathset=no
 426 AC_ARG_ENABLE(locallisppath,
 427 [AS_HELP_STRING([--enable-locallisppath=PATH],
 428                 [directories Emacs should search for lisp files specific
 429                  to this site])],
 430 if test "${enableval}" = "no"; then
 431   locallisppath=
 432 elif test "${enableval}" != "yes"; then
 433   locallisppath=${enableval} locallisppathset=yes
 434 fi)
 435
 436 AC_ARG_ENABLE(checking,
 437 [AS_HELP_STRING([--enable-checking@<:@=LIST@:>@],
 438                 [enable expensive run-time checks.  With LIST,
 439                  enable only specific categories of checks.
 440                  Categories are: all,yes,no.
 441                  Flags are: stringbytes, stringoverrun, stringfreelist,
 442                  xmallocoverrun, conslist, glyphs])],
 443 [ac_checking_flags="${enableval}"],[])
 444 IFS="${IFS=     }"; ac_save_IFS="$IFS"; IFS="$IFS,"
 445 for check in $ac_checking_flags
 446 do
 447         case $check in
 448         # these set all the flags to specific states
 449         yes)            ac_enable_checking=1 ;;
 450         no)             ac_enable_checking= ;
 451                         ac_gc_check_stringbytes= ;
 452                         ac_gc_check_string_overrun= ;
 453                         ac_gc_check_string_free_list= ;
 454                         ac_xmalloc_overrun= ;
 455                         ac_gc_check_cons_list= ;
 456                         ac_glyphs_debug= ;;
 457         all)            ac_enable_checking=1 ;
 458                         ac_gc_check_stringbytes=1 ;
 459                         ac_gc_check_string_overrun=1 ;
 460                         ac_gc_check_string_free_list=1 ;
 461                         ac_xmalloc_overrun=1 ;
 462                         ac_gc_check_cons_list=1 ;
 463                         ac_glyphs_debug=1 ;;
 464         # these enable particular checks
 465         stringbytes)    ac_gc_check_stringbytes=1 ;;
 466         stringoverrun)  ac_gc_check_string_overrun=1 ;;
 467         stringfreelist) ac_gc_check_string_free_list=1 ;;
 468         xmallocoverrun) ac_xmalloc_overrun=1 ;;
 469         conslist)       ac_gc_check_cons_list=1 ;;
 470         glyphs)         ac_glyphs_debug=1 ;;
 471         *)      AC_MSG_ERROR(unknown check category $check) ;;
 472         esac
 473 done
 474 IFS="$ac_save_IFS"
 475
 476 if test x$ac_enable_checking != x ; then
 477   AC_DEFINE(ENABLE_CHECKING, 1,
 478 [Define to 1 if expensive run-time data type and consistency checks are enabled.])
 479 fi
 480 if test x$ac_gc_check_stringbytes != x ; then
 481   AC_DEFINE(GC_CHECK_STRING_BYTES, 1,
 482 [Define this temporarily to hunt a bug.  If defined, the size of
 483    strings is redundantly recorded in sdata structures so that it can
 484    be compared to the sizes recorded in Lisp strings.])
 485 fi
 486 if test x$ac_gc_check_string_overrun != x ; then
 487   AC_DEFINE(GC_CHECK_STRING_OVERRUN, 1,
 488 [Define this to check for short string overrun.])
 489 fi
 490 if test x$ac_gc_check_string_free_list != x ; then
 491   AC_DEFINE(GC_CHECK_STRING_FREE_LIST, 1,
 492 [Define this to check the string free list.])
 493 fi
 494 if test x$ac_xmalloc_overrun != x ; then
 495   AC_DEFINE(XMALLOC_OVERRUN_CHECK, 1,
 496 [Define this to check for malloc buffer overrun.])
 497 fi
 498 if test x$ac_gc_check_cons_list != x ; then
 499   AC_DEFINE(GC_CHECK_CONS_LIST, 1,
 500 [Define this to check for errors in cons list.])
 501 fi
 502 if test x$ac_glyphs_debug != x ; then
 503   AC_DEFINE(GLYPH_DEBUG, 1,
 504 [Define this to enable glyphs debugging code.])
 505 fi
 506
 507 AC_ARG_ENABLE(check-lisp-object-type,
 508 [AS_HELP_STRING([--enable-check-lisp-object-type],
 509                 [enable compile time checks for the Lisp_Object data type.
 510                 This is useful for development for catching certain types of bugs.])],
 511 if test "${enableval}" != "no"; then
 512    AC_DEFINE(CHECK_LISP_OBJECT_TYPE, 1,
 513    [Define this to enable compile time checks for the Lisp_Object data type.])
 514 fi)
 515
 516
 517 dnl The name of this option is unfortunate.  It predates, and has no
 518 dnl relation to, the "sampling-based elisp profiler" added in 24.3.
 519 dnl Actually, it stops it working.
 520 dnl http://lists.gnu.org/archive/html/emacs-devel/2012-11/msg00393.html
 521 AC_ARG_ENABLE(profiling,
 522 [AS_HELP_STRING([--enable-profiling],
 523                 [build emacs with low-level, gprof profiling support.
 524                 Mainly useful for debugging Emacs itself.  May not work on
 525                 all platforms.  Stops profiler.el working.])],
 526 [ac_enable_profiling="${enableval}"],[])
 527 if test x$ac_enable_profiling != x ; then
 528    PROFILING_CFLAGS="-DPROFILING=1 -pg"
 529 else
 530    PROFILING_CFLAGS=
 531 fi
 532 AC_SUBST(PROFILING_CFLAGS)
 533
 534 AC_ARG_ENABLE(autodepend,
 535 [AS_HELP_STRING([--enable-autodepend],
 536                 [automatically generate dependencies to .h-files.
 537                  Requires gcc, enabled if found.])],
 538 [ac_enable_autodepend="${enableval}"],[ac_enable_autodepend=yes])
 539
 540 AC_ARG_ENABLE(gtk-deprecation-warnings,
 541 [AS_HELP_STRING([--enable-gtk-deprecation-warnings],
 542                 [Show Gtk+/Gdk deprecation warnings for Gtk+ >= 3.0])],
 543 [ac_enable_gtk_deprecation_warnings="${enableval}"],[])
 544
 545 dnl This used to use changequote, but, apart from 'changequote is evil'
 546 dnl per the autoconf manual, we can speed up autoconf somewhat by quoting
 547 dnl the great gob of text.  Thus it's not processed for possible expansion.
 548 dnl Just make sure the brackets remain balanced.
 549 dnl
 550 dnl Since Emacs can't find matching pairs of quotes, boundaries are
 551 dnl indicated by comments.
 552 dnl quotation begins
 553 [
 554
 555 ### If you add support for a new configuration, add code to this
 556 ### switch statement to recognize your configuration name and select
 557 ### the appropriate opsys.
 558
 559 ### As far as handling version numbers on operating systems is
 560 ### concerned, make sure things will fail in a fixable way.  If
 561 ### /etc/MACHINES doesn't say anything about version numbers, be
 562 ### prepared to handle anything reasonably.  If version numbers
 563 ### matter, be sure /etc/MACHINES says something about it.
 564
 565 opsys='' unported=no
 566 case "${canonical}" in
 567
 568   ## GNU/Linux and similar ports
 569   *-*-linux* )
 570     opsys=gnu-linux
 571   ;;
 572
 573   ## FreeBSD ports
 574   *-*-freebsd* )
 575     opsys=freebsd
 576   ;;
 577
 578   ## DragonFly ports
 579   *-*-dragonfly* )
 580     opsys=dragonfly
 581   ;;
 582
 583   ## FreeBSD kernel + glibc based userland
 584   *-*-kfreebsd*gnu* )
 585     opsys=gnu-kfreebsd
 586   ;;
 587
 588   ## NetBSD ports
 589   *-*-netbsd* )
 590     opsys=netbsd
 591   ;;
 592
 593   ## OpenBSD ports
 594   *-*-openbsd* | *-*-mirbsd* )
 595     opsys=openbsd
 596   ;;
 597
 598   ## Apple Darwin / Mac OS X
 599   *-apple-darwin* )
 600     case "${canonical}" in
 601       *-apple-darwin[0-9].*) unported=yes ;;
 602       i[3456]86-* | x86_64-* )  ;;
 603       * )            unported=yes ;;
 604     esac
 605     opsys=darwin
 606     ## Use fink packages if available.
 607     ## FIXME find a better way to do this: http://debbugs.gnu.org/11507
 608 ##    if test -d /sw/include && test -d /sw/lib; then
 609 ##      GCC_TEST_OPTIONS="-I/sw/include -L/sw/lib"
 610 ##      NON_GCC_TEST_OPTIONS=${GCC_TEST_OPTIONS}
 611 ##    fi
 612   ;;
 613
 614   ## Chromium Native Client
 615   *-nacl )
 616     opsys=nacl
 617   ;;
 618
 619   ## Cygwin ports
 620   *-*-cygwin )
 621     opsys=cygwin
 622   ;;
 623
 624   ## HP 9000 series 700 and 800, running HP/UX
 625   hppa*-hp-hpux10.2* )
 626     opsys=hpux10-20
 627   ;;
 628   hppa*-hp-hpux1[1-9]* )
 629     opsys=hpux11
 630     CFLAGS="-D_INCLUDE__STDC_A1_SOURCE $CFLAGS"
 631   ;;
 632
 633   ## IBM machines
 634   rs6000-ibm-aix4.[23]* )
 635     opsys=aix4-2
 636   ;;
 637   powerpc-ibm-aix4.[23]*  )
 638     opsys=aix4-2
 639   ;;
 640   rs6000-ibm-aix[56]* )
 641     opsys=aix4-2
 642   ;;
 643   powerpc-ibm-aix[5-9]* | powerpc-ibm-aix[1-9][0-9]* )
 644     opsys=aix4-2
 645   ;;
 646
 647   ## Silicon Graphics machines
 648   ## Iris 4D
 649   mips-sgi-irix6.5 )
 650     opsys=irix6-5
 651     # Without defining _LANGUAGE_C, things get masked out in the headers
 652     # so that, for instance, grepping for 'free' in stdlib.h fails and
 653     # AC_HEADER_STD_C fails.   (MIPSPro 7.2.1.2m compilers, Irix 6.5.3m).
 654     NON_GCC_TEST_OPTIONS="-D_LANGUAGE_C"
 655   ;;
 656
 657   ## Suns
 658   *-sun-solaris* \
 659     | i[3456]86-*-solaris2* | i[3456]86-*-sunos5* \
 660     | x86_64-*-solaris2*    | x86_64-*-sunos5*)
 661     case "${canonical}" in
 662       i[3456]86-*-* )   ;;
 663       amd64-*-*|x86_64-*-*) ;;
 664       sparc* )          ;;
 665       * )               unported=yes ;;
 666     esac
 667     case "${canonical}" in
 668       *-sunos5.[1-9][0-9]* | *-solaris2.[1-9][0-9]* )
 669                 opsys=sol2-10
 670                 emacs_check_sunpro_c=yes
 671                 ;;
 672       *-sunos5.[1-5]* | *-solaris2.[1-5]* ) unported=yes ;;
 673       ## Note that Emacs 23.1's NEWS said the following would be dropped.
 674       *-sunos5.6* | *-solaris2.6* )
 675                 opsys=sol2-6
 676                 RANLIB="ar -ts"
 677                 ;;
 678       ## 5.7 EOL Aug 2008, 5.8 EOL Mar 2012.
 679       *-sunos5.[7-9]* | *-solaris2.[7-9]* )
 680                 opsys=sol2-6
 681                 emacs_check_sunpro_c=yes
 682                 ;;
 683     esac
 684     ## Watch out for a compiler that we know will not work.
 685     case "${canonical}" in
 686      *-solaris* | *-sunos5* )
 687                 if [ "x$CC" = x/usr/ucb/cc ]; then
 688                   ## /usr/ucb/cc doesn't work;
 689                   ## we should find some other compiler that does work.
 690                   unset CC
 691                 fi
 692                 ;;
 693       *) ;;
 694     esac
 695   ;;
 696
 697   ## Intel 386 machines where we don't care about the manufacturer.
 698   i[3456]86-*-* )
 699     case "${canonical}" in
 700       *-darwin* )               opsys=darwin ;;
 701       *-mingw* )
 702                 opsys=mingw32
 703                 # MinGW overrides and adds some system headers in nt/inc.
 704                 GCC_TEST_OPTIONS="-I $srcdir/nt/inc"
 705                 ;;
 706       *-sysv4.2uw* )            opsys=unixware ;;
 707       *-sysv5uw* )              opsys=unixware ;;
 708       *-sysv5OpenUNIX* )        opsys=unixware ;;
 709       ## Otherwise, we'll fall through to the generic opsys code at the bottom.
 710     esac
 711   ;;
 712
 713   # MinGW64
 714   x86_64-*-* )
 715     case "${canonical}" in
 716       *-mingw* )
 717                 opsys=mingw32
 718                 # MinGW overrides and adds some system headers in nt/inc.
 719                 GCC_TEST_OPTIONS="-I $srcdir/nt/inc"
 720                 ;;
 721       ## Otherwise, we'll fall through to the generic opsys code at the bottom.
 722     esac
 723   ;;
 724
 725   * )
 726     unported=yes
 727   ;;
 728 esac
 729
 730 ### If the code above didn't choose an operating system, just choose
 731 ### an operating system based on the configuration name.  You really
 732 ### only want to use this when you have no idea what the right
 733 ### operating system is; if you know what operating systems a machine
 734 ### runs, it's cleaner to make it explicit in the case statement
 735 ### above.
 736 if test x"${opsys}" = x; then
 737   case "${canonical}" in
 738     *-gnu* )                            opsys=gnu ;;
 739     * )
 740       unported=yes
 741     ;;
 742   esac
 743 fi
 744
 745 ]
 746 dnl quotation ends
 747
 748 if test $unported = yes; then
 749   AC_MSG_ERROR([Emacs does not support '${canonical}' systems.
 750 If you think it should, please send a report to ${PACKAGE_BUGREPORT}.
 751 Check 'etc/MACHINES' for recognized configuration names.])
 752 fi
 753
 754 #### Choose a compiler.
 755
 756 dnl Don't bother to test for C89.
 757 AC_DEFUN([_AC_PROG_CC_C89], [$2])
 758
 759 dnl Sets GCC=yes if using gcc.
 760 AC_PROG_CC([gcc cc cl clang "$XCRUN gcc" "$XCRUN clang"])
 761 if test -n "$XCRUN"; then
 762   AC_CHECK_PROGS(AR, [ar "$XCRUN ar"])
 763   test -n "$AR" && export AR
 764 fi
 765
 766 dnl Emacs needs C99 or later.
 767 gl_PROG_CC_C99
 768
 769 AM_PROG_CC_C_O
 770
 771 if test x$GCC = xyes; then
 772   test "x$GCC_TEST_OPTIONS" != x && CC="$CC $GCC_TEST_OPTIONS"
 773 else
 774   test "x$NON_GCC_TEST_OPTIONS" != x && CC="$CC $NON_GCC_TEST_OPTIONS"
 775 fi
 776
 777 dnl This is used in lib/Makefile.am to use nt/gnulib.mk, the
 778 dnl alternative to lib/gnulib.mk, so as to avoid generating header files
 779 dnl that clash with MinGW.
 780 AM_CONDITIONAL([BUILDING_FOR_WINDOWSNT], [test "x$opsys" = "xmingw32"])
 781
 782 # Avoid gnulib's tests for -lcrypto, so that there's no static dependency on it.
 783 AC_DEFUN([gl_CRYPTO_CHECK])
 784 # Avoid gnulib's tests for HAVE_WORKING_O_NOATIME and HAVE_WORKING_O_NOFOLLOW,
 785 # as we don't use them.
 786 AC_DEFUN([gl_FCNTL_O_FLAGS])
 787 # Avoid gnulib's test for pthread_sigmask.
 788 funcs=
 789 for func in $ac_func_list; do
 790   test $func = pthread_sigmask || AS_VAR_APPEND([funcs], [" $func"])
 791 done
 792 ac_func_list=$funcs
 793 # Use the system putenv even if it lacks GNU features, as we don't need them,
 794 # and the gnulib replacement runs afoul of a FreeBSD 10.1 bug; see Bug#19874.
 795 AC_CHECK_FUNCS_ONCE([putenv])
 796 AC_DEFUN([gl_FUNC_PUTENV],
 797   [test "$ac_cv_func_putenv" = yes || REPLACE_PUTENV=1])
 798
 799 # Initialize gnulib right after choosing the compiler.
 800 dnl Amongst other things, this sets AR and ARFLAGS.
 801 gl_EARLY
 802
 803 if test "$ac_test_CFLAGS" != set; then
 804   # It's helpful to have C macros available to GDB, so prefer -g3 to -g
 805   # if -g3 works and the user does not specify CFLAGS.
 806   # This test must follow gl_EARLY; otherwise AC_LINK_IFELSE complains.
 807   case $CFLAGS in
 808     '-g')
 809       emacs_g3_CFLAGS='-g3';;
 810     '-g -O2')
 811       emacs_g3_CFLAGS='-g3 -O2';;
 812     *)
 813       emacs_g3_CFLAGS='';;
 814   esac
 815   if test -n "$emacs_g3_CFLAGS"; then
 816     emacs_save_CFLAGS=$CFLAGS
 817     CFLAGS=$emacs_g3_CFLAGS
 818     AC_CACHE_CHECK([whether $CC accepts $emacs_g3_CFLAGS],
 819       [emacs_cv_prog_cc_g3],
 820       [AC_LINK_IFELSE([AC_LANG_PROGRAM()],
 821          [emacs_cv_prog_cc_g3=yes],
 822          [emacs_cv_prog_cc_g3=no])])
 823     if test $emacs_cv_prog_cc_g3 != yes; then
 824       CFLAGS=$emacs_save_CFLAGS
 825     fi
 826     if test $opsys = mingw32; then
 827       CFLAGS="$CFLAGS -gdwarf-2"
 828     fi
 829   fi
 830
 831   case $CFLAGS in
 832     *-O*) ;;
 833     *)
 834       # No optimization flag was inferred for this non-GCC compiler.
 835       # Try -O.  This is needed for xlc on AIX; see Bug#14258.
 836       emacs_save_CFLAGS=$CFLAGS
 837       test -z "$CFLAGS" || CFLAGS="$CFLAGS "
 838       CFLAGS=${CFLAGS}-O
 839       AC_CACHE_CHECK([whether $CC accepts -O],
 840         [emacs_cv_prog_cc_o],
 841         [AC_LINK_IFELSE([AC_LANG_PROGRAM()],
 842            [emacs_cv_prog_cc_o=yes],
 843            [emacs_cv_prog_cc_o=no])])
 844       if test $emacs_cv_prog_cc_o != yes; then
 845         CFLAGS=$emacs_save_CFLAGS
 846       fi ;;
 847   esac
 848 fi
 849
 850 AC_ARG_ENABLE([gcc-warnings],
 851   [AS_HELP_STRING([--enable-gcc-warnings],
 852                   [turn on lots of GCC warnings/errors. This is intended for
 853                    developers, and may generate false alarms when used
 854                    with older or non-GNU development tools.])],
 855   [case $enableval in
 856      yes|no) ;;
 857      *)      AC_MSG_ERROR([bad value $enableval for gcc-warnings option]) ;;
 858    esac
 859    gl_gcc_warnings=$enableval],
 860   [gl_gcc_warnings=no]
 861 )
 862
 863 # clang is unduly picky about some things.
 864 AC_CACHE_CHECK([whether the compiler is clang], [emacs_cv_clang],
 865   [AC_COMPILE_IFELSE(
 866      [AC_LANG_PROGRAM([[
 867           #ifndef __clang__
 868             error "not clang";
 869           #endif
 870         ]])],
 871      [emacs_cv_clang=yes],
 872      [emacs_cv_clang=no])])
 873
 874 # When compiling with GCC, prefer -isystem to -I when including system
 875 # include files, to avoid generating useless diagnostics for the files.
 876 if test "$gl_gcc_warnings" != yes; then
 877   isystem='-I'
 878   if test "$emacs_cv_clang" = yes
 879   then
 880      # Turn off some warnings if supported.
 881      gl_WARN_ADD([-Wno-switch])
 882      gl_WARN_ADD([-Wno-tautological-constant-out-of-range-compare])
 883      gl_WARN_ADD([-Wno-pointer-sign])
 884      gl_WARN_ADD([-Wno-string-plus-int])
 885      gl_WARN_ADD([-Wno-unknown-attributes])
 886   fi
 887 else
 888   isystem='-isystem '
 889
 890   # This, $nw, is the list of warnings we disable.
 891   nw=
 892
 893   case $with_x_toolkit in
 894     lucid | athena | motif)
 895        # Old toolkits mishandle 'const'.
 896        nw="$nw -Wwrite-strings"
 897        ;;
 898     *)
 899        gl_WARN_ADD([-Werror], [WERROR_CFLAGS])
 900        ;;
 901   esac
 902   AC_SUBST([WERROR_CFLAGS])
 903
 904   nw="$nw -Wsystem-headers"         # Don't let system headers trigger warnings
 905   nw="$nw -Woverlength-strings"     # Not a problem these days
 906   nw="$nw -Wformat-nonliteral"      # we do this a lot
 907   nw="$nw -Wvla"                    # Emacs uses <vla.h>.
 908   nw="$nw -Wswitch-default"         # Too many warnings for now
 909   nw="$nw -Winline"                 # OK to ignore 'inline'
 910   nw="$nw -Wjump-misses-init"       # We sometimes safely jump over init.
 911   nw="$nw -Wstrict-overflow"        # OK to optimize assuming that
 912                                     # signed overflow has undefined behavior
 913   nw="$nw -Wsync-nand"              # irrelevant here, and provokes ObjC warning
 914   nw="$nw -Wunsafe-loop-optimizations" # OK to suppress unsafe optimizations
 915   nw="$nw -Wbad-function-cast"      # These casts are no worse than others.
 916
 917   # Emacs doesn't care about shadowing; see
 918   # <http://lists.gnu.org/archive/html/emacs-diffs/2011-11/msg00265.html>.
 919   nw="$nw -Wshadow"
 920
 921   # Emacs's use of alloca inhibits protecting the stack.
 922   nw="$nw -Wstack-protector"
 923
 924   # Emacs's use of partly-const functions such as Fgnutls_available_p
 925   # make this option problematic.
 926   nw="$nw -Wsuggest-attribute=const"
 927
 928   # Emacs's use of partly-pure functions such as CHECK_TYPE make this
 929   # option problematic.
 930   nw="$nw -Wsuggest-attribute=pure"
 931
 932   # This part is merely for shortening the command line,
 933   # since -Wall implies -Wswitch.
 934   nw="$nw -Wswitch"
 935
 936   # This part is merely for shortening the command line,
 937   # since -Wno-FOO needs to be added below regardless.
 938   nw="$nw -Wmissing-field-initializers"
 939   nw="$nw -Wtype-limits"
 940   nw="$nw -Wunused-parameter"
 941
 942   if test $emacs_cv_clang = yes; then
 943     nw="$nw -Wcast-align"
 944   fi
 945
 946   gl_MANYWARN_ALL_GCC([ws])
 947   gl_MANYWARN_COMPLEMENT([ws], [$ws], [$nw])
 948   for w in $ws; do
 949     gl_WARN_ADD([$w])
 950   done
 951   gl_WARN_ADD([-Wredundant-decls])     # Prefer this, as we don't use Bison.
 952   gl_WARN_ADD([-Wno-missing-field-initializers]) # We need this one
 953   gl_WARN_ADD([-Wno-sign-compare])     # Too many warnings for now
 954   gl_WARN_ADD([-Wno-type-limits])      # Too many warnings for now
 955   gl_WARN_ADD([-Wno-unused-parameter]) # Too many warnings for now
 956   gl_WARN_ADD([-Wno-format-nonliteral])
 957
 958   # More things that clang is unduly picky about.
 959   if test $emacs_cv_clang = yes; then
 960     gl_WARN_ADD([-Wno-format-extra-args])
 961     gl_WARN_ADD([-Wno-tautological-constant-out-of-range-compare])
 962     gl_WARN_ADD([-Wno-unused-command-line-argument])
 963     gl_WARN_ADD([-Wno-unused-value])
 964   fi
 965
 966   AC_DEFINE([lint], [1], [Define to 1 if the compiler is checking for lint.])
 967   AC_DEFINE([GNULIB_PORTCHECK], [1], [enable some gnulib portability checks])
 968   AH_VERBATIM([GNULIB_PORTCHECK_FORTIFY_SOURCE],
 969   [/* Enable compile-time and run-time bounds-checking, and some warnings,
 970       without upsetting glibc 2.15+. */
 971    #if (defined GNULIB_PORTCHECK && !defined _FORTIFY_SOURCE \
 972         && defined __OPTIMIZE__ && __OPTIMIZE__)
 973    # define _FORTIFY_SOURCE 2
 974    #endif
 975   ])
 976
 977   # We use a slightly smaller set of warning options for lib/.
 978   # Remove the following and save the result in GNULIB_WARN_CFLAGS.
 979   nw=
 980   nw="$nw -Wunused-macros"
 981
 982   gl_MANYWARN_COMPLEMENT([GNULIB_WARN_CFLAGS], [$WARN_CFLAGS], [$nw])
 983   AC_SUBST([GNULIB_WARN_CFLAGS])
 984 fi
 985
 986 edit_cflags="
 987   s,///*,/,g
 988   s/^/ /
 989   s/ -I/ $isystem/g
 990   s/^ //
 991 "
 992
 993 AC_ARG_ENABLE(link-time-optimization,
 994 [AS_HELP_STRING([--enable-link-time-optimization],
 995                 [build emacs with link-time optimization.
 996                  This requires GCC 4.5.0 or later, or clang.
 997                  (Note that clang support is experimental - see INSTALL.)
 998                  It also makes Emacs harder to debug, and when we tried it
 999                  with GCC 4.9.0 x86-64 it made Emacs slower, so it's not
1000                  recommended for typical use.])],
1001 if test "${enableval}" != "no"; then
1002    ac_lto_supported=no
1003    if test $emacs_cv_clang = yes; then
1004       AC_MSG_CHECKING([whether link-time optimization is supported by clang])
1005       GOLD_PLUGIN=`$CC -print-file-name=LLVMgold.so 2>/dev/null`
1006       if test -x "$GOLD_PLUGIN"; then
1007          LTO="-flto"
1008       fi
1009    elif test x$GCC = xyes; then
1010       AC_MSG_CHECKING([whether link-time optimization is supported by gcc])
1011       CPUS=`getconf _NPROCESSORS_ONLN 2>/dev/null`
1012       if test x$CPUS != x; then
1013          LTO="-flto=$CPUS"
1014       else
1015          LTO="-flto"
1016       fi
1017    else
1018       AC_MSG_ERROR([Link-time optimization is not supported with your compiler.])
1019    fi
1020    if test -z "$LTO"; then
1021       ac_lto_supported=no
1022    else
1023       old_CFLAGS=$CFLAGS
1024       CFLAGS="$CFLAGS $LTO"
1025       AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
1026          [ac_lto_supported=yes], [ac_lto_supported=no])
1027          CFLAGS="$old_CFLAGS"
1028    fi
1029    AC_MSG_RESULT([$ac_lto_supported])
1030    if test "$ac_lto_supported" = "yes"; then
1031       CFLAGS="$CFLAGS $LTO"
1032       if test x$emacs_cv_clang = xyes; then
1033          AC_MSG_WARN([Please read INSTALL before using link-time optimization with clang])
1034          # WARNING: 'ar --plugin ...' doesn't work without
1035          # command, so plugin name is appended to ARFLAGS.
1036          ARFLAGS="cru --plugin $GOLD_PLUGIN"
1037          RANLIB="$RANLIB --plugin $GOLD_PLUGIN"
1038       else
1039         dnl The following is needed for GCC 4.9.0.  The GCC 4.9.0 release notes
1040         dnl suggest that instead of -ffat-lto-objects we should use gcc-ar and
1041         dnl gcc-ranlib in place of ar and ranlib, but gcc-ar makes /usr/bin/ar
1042         dnl dump core on Fedora 20, so play it safe for now.
1043         gl_COMPILER_OPTION_IF([-ffat-lto-objects],
1044           [CFLAGS="$CFLAGS -ffat-lto-objects"])
1045       fi
1046    fi
1047 fi)
1048
1049 dnl Prefer silent make output.  For verbose output, use
1050 dnl 'configure --disable-silent-rules' or 'make V=1' .
1051 AM_SILENT_RULES([yes])
1052 dnl Port to Automake 1.11.
1053 dnl This section can be removed once we assume Automake 1.14 or later.
1054 : ${AM_V=$AM_DEFAULT_VERBOSITY}
1055 : ${AM_DEFAULT_V=$AM_DEFAULT_VERBOSITY}
1056 AC_SUBST([AM_V])
1057 AM_SUBST_NOTMAKE([AM_V])
1058 AC_SUBST([AM_DEFAULT_V])
1059 AM_SUBST_NOTMAKE([AM_DEFAULT_V])
1060 AC_SUBST([AM_DEFAULT_VERBOSITY])
1061
1062 dnl Some other nice autoconf tests.
1063 dnl These are commented out, since gl_EARLY and/or Autoconf already does them.
1064 dnl AC_PROG_INSTALL
1065 dnl AC_PROG_MKDIR_P
1066 dnl if test "x$RANLIB" = x; then
1067 dnl   AC_PROG_RANLIB
1068 dnl fi
1069
1070
1071 dnl Sadly, AC_PROG_LN_S is too restrictive.  It also tests whether links
1072 dnl can be made to directories.  This is not relevant for our usage, and
1073 dnl excludes some cases that work fine for us.  Eg MS Windows or files
1074 dnl hosted on AFS, both examples where simple links work, but links to
1075 dnl directories fail.  We use a cut-down version instead.
1076 dnl AC_PROG_LN_S
1077
1078 AC_MSG_CHECKING([whether ln -s works for files in the same directory])
1079 rm -f conf$$ conf$$.file
1080
1081 LN_S_FILEONLY='cp -p'
1082
1083 dnl On MinGW, ensure we will call the MSYS /bin/ln.exe, not some
1084 dnl random program in the current directory.
1085 if (echo >conf$$.file) 2>/dev/null; then
1086   if ln -s conf$$.file conf$$ 2>/dev/null; then
1087     if test "$opsys" = "mingw32"; then
1088       LN_S_FILEONLY='/bin/ln -s'
1089     else
1090       LN_S_FILEONLY='ln -s'
1091     fi
1092   elif ln conf$$.file conf$$ 2>/dev/null; then
1093     if test "$opsys" = "mingw32"; then
1094       LN_S_FILEONLY=/bin/ln
1095     else
1096       LN_S_FILEONLY=ln
1097     fi
1098   fi
1099 fi
1100
1101 rm -f conf$$ conf$$.file
1102
1103 if test "$LN_S_FILEONLY" = "ln -s"; then
1104    AC_MSG_RESULT([yes])
1105 else
1106    AC_MSG_RESULT([no, using $LN_S_FILEONLY])
1107 fi
1108
1109 AC_SUBST(LN_S_FILEONLY)
1110
1111
1112 dnl AC_PROG_LN_S sets LN_S to 'cp -pR' for MinGW, on the premise that 'ln'
1113 dnl doesn't support links to directories, as in "ln file dir".  But that
1114 dnl use is non-portable, and OTOH MinGW wants to use hard links for Emacs
1115 dnl executables at "make install" time.
1116 dnl See http://lists.gnu.org/archive/html/emacs-devel/2013-04/msg00475.html
1117 dnl for more details.
1118 if test "$opsys" = "mingw32"; then
1119   LN_S="/bin/ln"
1120 fi
1121
1122 dnl On some Debian versions, "install-info" prints irritating messages
1123 dnl "This is not dpkg install-info anymore, but GNU install-info"
1124 dnl if called via an absolute file name.
1125 dnl Use the entirely-identical-but-quieter ginstall-info instead if present.
1126 dnl Sadly some people may have an old ginstall-info installed on
1127 dnl non-Debian systems, so we can't use this.
1128 dnl AC_PATH_PROGS(INSTALL_INFO, [ginstall-info install-info], :,
1129 dnl   $PATH$PATH_SEPARATOR/usr/sbin$PATH_SEPARATOR/sbin)
1130
1131 AC_PATH_PROG(INSTALL_INFO, install-info, :,
1132   $PATH$PATH_SEPARATOR/usr/sbin$PATH_SEPARATOR/sbin)
1133 dnl Don't use GZIP, which is used by gzip for additional parameters.
1134 AC_PATH_PROG(GZIP_PROG, gzip)
1135
1136 test $with_compress_install != yes && test -n "$GZIP_PROG" && \
1137    GZIP_PROG=" # $GZIP_PROG # (disabled by configure --without-compress-install)"
1138
1139 if test $opsys = gnu-linux; then
1140   AC_PATH_PROG(PAXCTL, paxctl,,
1141     [$PATH$PATH_SEPARATOR/sbin$PATH_SEPARATOR/usr/sbin])
1142   if test "X$PAXCTL" != X; then
1143     AC_MSG_CHECKING([whether binaries have a PT_PAX_FLAGS header])
1144     AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])],
1145       [if $PAXCTL -v conftest$EXEEXT >/dev/null 2>&1; then AC_MSG_RESULT(yes)
1146       else AC_MSG_RESULT(no); PAXCTL=""; fi])
1147   fi
1148
1149   if test "${SETFATTR+set}" != set; then
1150     AC_CACHE_CHECK([for setfattr],
1151       [emacs_cv_prog_setfattr],
1152       [touch conftest.tmp
1153        if (setfattr -n user.pax.flags conftest.tmp) >/dev/null 2>&1; then
1154          emacs_cv_prog_setfattr=yes
1155        else
1156          emacs_cv_prog_setfattr=no
1157        fi])
1158     if test "$emacs_cv_prog_setfattr" = yes; then
1159       SETFATTR=setfattr
1160     else
1161       SETFATTR=
1162     fi
1163     rm -f conftest.tmp
1164     AC_SUBST([SETFATTR])
1165   fi
1166 fi
1167
1168 ## Need makeinfo >= 4.7 (?) to build the manuals.
1169 if test "$MAKEINFO" != "no"; then
1170   if test "$MAKEINFO" = "${am_missing_run}makeinfo"; then
1171     MAKEINFO=makeinfo
1172   fi
1173   case `($MAKEINFO --version) 2>/dev/null` in
1174     *' (GNU texinfo) '4.[[7-9]]* | \
1175     *' (GNU texinfo) '4.[[1-9][0-9]]* | \
1176     *' (GNU texinfo) '[[5-9]]* | \
1177     *' (GNU texinfo) '[[1-9][0-9]]* ) ;;
1178     *) MAKEINFO=no;;
1179   esac
1180 fi
1181
1182 ## Makeinfo is unusual.  For a released Emacs, the manuals are
1183 ## pre-built, and not deleted by the normal clean rules.  makeinfo is
1184 ## therefore in the category of "special tools" not normally required, which
1185 ## configure does not have to check for (eg autoconf itself).
1186 ## In a repository checkout on the other hand, the manuals are not included.
1187 ## So makeinfo is a requirement to build from the repository, and configure
1188 ## should test for it as it does for any other build requirement.
1189 ## We use the presence of $srcdir/info/emacs to distinguish a release,
1190 ## with pre-built manuals, from a repository checkout.
1191 HAVE_MAKEINFO=yes
1192
1193 if test "$MAKEINFO" = "no"; then
1194   MAKEINFO=makeinfo
1195   if test "x${with_makeinfo}" = "xno"; then
1196     HAVE_MAKEINFO=no
1197   elif test ! -e "$srcdir/info/emacs" && test ! -e "$srcdir/info/emacs.info"; then
1198     AC_MSG_ERROR( [You do not seem to have makeinfo >= 4.7, and your
1199 source tree does not seem to have pre-built manuals in the 'info' directory.
1200 Either install a suitable version of makeinfo, or re-run configure
1201 with the '--without-makeinfo' option to build without the manuals.] )
1202   fi
1203 fi
1204 AC_SUBST(HAVE_MAKEINFO)
1205
1206 if test $opsys = mingw32; then
1207    DOCMISC_W32=efaq-w32
1208 else
1209    DOCMISC_W32=
1210 fi
1211 AC_SUBST(DOCMISC_W32)
1212
1213 dnl Add our options to ac_link now, after it is set up.
1214
1215 if test x$GCC = xyes; then
1216   test "x$GCC_LINK_TEST_OPTIONS" != x && \
1217     ac_link="$ac_link $GCC_LINK_TEST_OPTIONS"
1218 else
1219   test "x$NON_GCC_LINK_TEST_OPTIONS" != x && \
1220     ac_link="$ac_link $NON_GCC_LINK_TEST_OPTIONS"
1221 fi
1222
1223 dnl We need -znocombreloc if we're using a relatively recent GNU ld.
1224 dnl If we can link with the flag, it shouldn't do any harm anyhow.
1225 dnl (Don't use '-z nocombreloc' as -z takes no arg on Irix.)
1226 dnl Treat GCC specially since it just gives a non-fatal 'unrecognized option'
1227 dnl if not built to support GNU ld.
1228
1229 dnl For a long time, -znocombreloc was added to LDFLAGS rather than
1230 dnl LD_SWITCH_SYSTEM_TEMACS.  That is:
1231 dnl * inappropriate, as LDFLAGS is a user option but this is essential.
1232 dnl   Eg "make LDFLAGS=... all" could run into problems,
1233 dnl   http://bugs.debian.org/684788
1234 dnl * unnecessary, since temacs is the only thing that actually needs it.
1235 dnl   Indeed this is where it was originally, prior to:
1236 dnl   http://lists.gnu.org/archive/html/emacs-pretest-bug/2004-03/msg00170.html
1237 late_LDFLAGS="$LDFLAGS"
1238 if test x$GCC = xyes; then
1239   LDFLAGS_NOCOMBRELOC="-Wl,-znocombreloc"
1240 else
1241   LDFLAGS_NOCOMBRELOC="-znocombreloc"
1242 fi
1243
1244 LDFLAGS="$LDFLAGS $LDFLAGS_NOCOMBRELOC"
1245
1246 AC_MSG_CHECKING([for -znocombreloc])
1247 AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])],
1248   [AC_MSG_RESULT(yes)],
1249   LDFLAGS_NOCOMBRELOC=
1250   [AC_MSG_RESULT(no)])
1251
1252 LDFLAGS="$late_LDFLAGS"
1253
1254 AC_CACHE_CHECK([whether addresses are sanitized],
1255   [emacs_cv_sanitize_address],
1256   [AC_COMPILE_IFELSE(
1257      [AC_LANG_PROGRAM(
1258         [[#ifndef __has_feature
1259           #define __has_feature(f) 0
1260           #endif
1261           #if defined __SANITIZE_ADDRESS__ || __has_feature (address_sanitizer)
1262           #else
1263            error "Addresses are not sanitized.";
1264           #endif
1265         ]])],
1266      [emacs_cv_sanitize_address=yes],
1267      [emacs_cv_sanitize_address=no])])
1268
1269 dnl The function dump-emacs will not be defined and temacs will do
1270 dnl (load "loadup") automatically unless told otherwise.
1271 test "x$CANNOT_DUMP" = "x" && CANNOT_DUMP=no
1272 case "$opsys" in
1273   nacl) CANNOT_DUMP=yes ;;
1274 esac
1275
1276 if test "$CANNOT_DUMP" = "yes"; then
1277   AC_DEFINE(CANNOT_DUMP, 1, [Define if Emacs cannot be dumped on your system.])
1278 elif test "$emacs_cv_sanitize_address" = yes; then
1279   AC_MSG_WARN([[Addresses are sanitized; suggest CANNOT_DUMP=yes]])
1280 fi
1281
1282 AC_SUBST(CANNOT_DUMP)
1283
1284
1285 UNEXEC_OBJ=unexelf.o
1286 case "$opsys" in
1287   # MSDOS uses unexcoff.o
1288   aix4-2)
1289    UNEXEC_OBJ=unexaix.o
1290    ;;
1291   cygwin)
1292    UNEXEC_OBJ=unexcw.o
1293    ;;
1294   darwin)
1295    UNEXEC_OBJ=unexmacosx.o
1296    ;;
1297   hpux10-20 | hpux11)
1298    UNEXEC_OBJ=unexhp9k800.o
1299    ;;
1300   mingw32)
1301    UNEXEC_OBJ=unexw32.o
1302    ;;
1303   sol2-10)
1304    # Use the Solaris dldump() function, called from unexsol.c, to dump
1305    # emacs, instead of the generic ELF dump code found in unexelf.c.
1306    # The resulting binary has a complete symbol table, and is better
1307    # for debugging and other observability tools (debuggers, pstack, etc).
1308    #
1309    # If you encounter a problem using dldump(), please consider sending
1310    # a message to the OpenSolaris tools-linking mailing list:
1311    #      http://mail.opensolaris.org/mailman/listinfo/tools-linking
1312    #
1313    # It is likely that dldump() works with older Solaris too, but this has
1314    # not been tested, so for now this change is for Solaris 10 or newer.
1315    UNEXEC_OBJ=unexsol.o
1316    ;;
1317 esac
1318
1319 LD_SWITCH_SYSTEM=
1320 case "$opsys" in
1321   freebsd|dragonfly)
1322    ## Let 'ld' find image libs and similar things in /usr/local/lib.
1323    ## The system compiler, GCC, has apparently been modified to not
1324    ## look there, contrary to what a stock GCC would do.
1325 ### It's not our place to do this.  See bug#10313#17.
1326 ###   LD_SWITCH_SYSTEM=-L/usr/local/lib
1327       :
1328    ;;
1329
1330   gnu-linux)
1331    ## cpp test was "ifdef __mips__", but presumably this is equivalent...
1332    case $host_cpu in mips*) LD_SWITCH_SYSTEM="-G 0";; esac
1333    ;;
1334
1335   netbsd)
1336 ### It's not our place to do this.  See bug#10313#17.
1337 ###   LD_SWITCH_SYSTEM="-Wl,-rpath,/usr/pkg/lib -L/usr/pkg/lib -Wl,-rpath,/usr/local/lib -L/usr/local/lib"
1338       :
1339    ;;
1340
1341   openbsd)
1342    ## Han Boetes <han@boetes.org> says this is necessary,
1343    ## otherwise Emacs dumps core on elf systems.
1344    LD_SWITCH_SYSTEM="-Z"
1345    ;;
1346 esac
1347 AC_SUBST(LD_SWITCH_SYSTEM)
1348
1349 ac_link="$ac_link $LD_SWITCH_SYSTEM"
1350
1351 ## This setting of LD_SWITCH_SYSTEM references LD_SWITCH_X_SITE_RPATH,
1352 ## which has not been defined yet.  When this was handled with cpp,
1353 ## it was expanded to null when configure sourced the s/*.h file.
1354 ## Thus LD_SWITCH_SYSTEM had different values in configure and the Makefiles.
1355 ## FIXME it would be cleaner to put this in LD_SWITCH_SYSTEM_TEMACS
1356 ## (or somesuch), but because it is supposed to go at the _front_
1357 ## of LD_SWITCH_SYSTEM, we cannot do that in exactly the same way.
1358 ## Compare with the gnu-linux case below, which added to the end
1359 ## of LD_SWITCH_SYSTEM, and so can instead go at the front of
1360 ## LD_SWITCH_SYSTEM_TEMACS.
1361 case "$opsys" in
1362   netbsd|openbsd)
1363    LD_SWITCH_SYSTEM="\$(LD_SWITCH_X_SITE_RPATH) $LD_SWITCH_SYSTEM" ;;
1364 esac
1365
1366
1367 C_SWITCH_MACHINE=
1368 case $canonical in
1369  alpha*)
1370   AC_CHECK_DECL([__ELF__])
1371   if test "$ac_cv_have_decl___ELF__" = "yes"; then
1372     ## With ELF, make sure that all common symbols get allocated to in the
1373     ## data section.  Otherwise, the dump of temacs may miss variables in
1374     ## the shared library that have been initialized.  For example, with
1375     ## GNU libc, __malloc_initialized would normally be resolved to the
1376     ## shared library's .bss section, which is fatal.
1377     if test "x$GCC" = "xyes"; then
1378       C_SWITCH_MACHINE="-fno-common"
1379     else
1380       AC_MSG_ERROR([Non-GCC compilers are not supported.])
1381     fi
1382   else
1383       dnl This was the unexalpha.c case.  Removed in 24.1, 2010-07-24,
1384       dnl albeit under the mistaken assumption that said file
1385       dnl was no longer used.
1386       AC_MSG_ERROR([Non-ELF systems are not supported since Emacs 24.1.])
1387   fi
1388   ;;
1389 esac
1390 AC_SUBST(C_SWITCH_MACHINE)
1391
1392 AC_SUBST(UNEXEC_OBJ)
1393
1394 C_SWITCH_SYSTEM=
1395 ## Some programs in src produce warnings saying certain subprograms
1396 ## are too complex and need a MAXMEM value greater than 2000 for
1397 ## additional optimization.  --nils@exp-math.uni-essen.de
1398 test "$opsys" = "aix4.2" && test "x$GCC" != "xyes" && \
1399   C_SWITCH_SYSTEM="-ma -qmaxmem=4000"
1400 if test "$opsys" = "mingw32"; then
1401   case "$canonical" in
1402     x86_64-*-mingw*) C_SWITCH_SYSTEM="-mtune=generic" ;;
1403     *) C_SWITCH_SYSTEM="-mtune=pentium4" ;;
1404   esac
1405 fi
1406 ## gnu-linux might need -D_BSD_SOURCE on old libc5 systems.
1407 ## It is redundant in glibc2, since we define _GNU_SOURCE.
1408 AC_SUBST(C_SWITCH_SYSTEM)
1409
1410
1411 LIBS_SYSTEM=
1412 case "$opsys" in
1413   ## IBM's X11R5 uses -lIM and -liconv in AIX 3.2.2.
1414   aix4-2) LIBS_SYSTEM="-lrts -lIM -liconv" ;;
1415
1416   freebsd|dragonfly) LIBS_SYSTEM="-lutil" ;;
1417
1418   hpux*) LIBS_SYSTEM="-l:libdld.sl" ;;
1419
1420   sol2*) LIBS_SYSTEM="-lsocket -lnsl" ;;
1421
1422   ## Motif needs -lgen.
1423   unixware) LIBS_SYSTEM="-lsocket -lnsl -lelf -lgen" ;;
1424 esac
1425
1426 AC_SUBST(LIBS_SYSTEM)
1427
1428 ### Make sure subsequent tests use flags consistent with the build flags.
1429
1430 if test x"${OVERRIDE_CPPFLAGS}" != x; then
1431   CPPFLAGS="${OVERRIDE_CPPFLAGS}"
1432 else
1433   CPPFLAGS="$C_SWITCH_SYSTEM $C_SWITCH_MACHINE $CPPFLAGS"
1434 fi
1435
1436 # Suppress obsolescent Autoconf test for size_t; Emacs assumes C99 or better.
1437 AC_DEFUN([AC_TYPE_SIZE_T])
1438 # Likewise for obsolescent test for uid_t, gid_t; Emacs assumes them.
1439 AC_DEFUN([AC_TYPE_UID_T])
1440
1441 # sqrt and other floating-point functions such as fmod and frexp
1442 # are found in -lm on many systems.
1443 OLD_LIBS=$LIBS
1444 AC_SEARCH_LIBS([sqrt], [m])
1445 if test "X$LIBS" = "X$OLD_LIBS"; then
1446   LIB_MATH=
1447 else
1448   LIB_MATH=$ac_cv_search_sqrt
1449 fi
1450 LIBS=$OLD_LIBS
1451
1452 dnl Current possibilities handled by sed (aix4-2 -> aix,
1453 dnl gnu-linux -> gnu/linux, etc.):
1454 dnl gnu, gnu/linux, gnu/kfreebsd, aix, cygwin, darwin, hpux, irix.
1455 dnl And special cases: berkeley-unix, usg-unix-v, ms-dos, windows-nt.
1456 SYSTEM_TYPE=`echo $opsys | sed -e 's/[[0-9]].*//' -e 's|-|/|'`
1457
1458 case $opsys in
1459   cygwin )
1460     LIB_MATH=
1461     ;;
1462   darwin )
1463     ## Adding -lm confuses the dynamic linker, so omit it.
1464     LIB_MATH=
1465     ;;
1466   freebsd | dragonfly )
1467     SYSTEM_TYPE=berkeley-unix
1468     ;;
1469   gnu-linux | gnu-kfreebsd )
1470     ;;
1471   hpux10-20 | hpux11 )
1472     ;;
1473   mingw32 )
1474     LIB_MATH=
1475     SYSTEM_TYPE=windows-nt
1476     ;;
1477   dnl NB this may be adjusted below.
1478   netbsd | openbsd )
1479     SYSTEM_TYPE=berkeley-unix
1480     ;;
1481
1482   sol2* | unixware )
1483     SYSTEM_TYPE=usg-unix-v
1484     ;;
1485
1486 esac
1487
1488 AC_SUBST(LIB_MATH)
1489 AC_DEFINE_UNQUOTED(SYSTEM_TYPE, "$SYSTEM_TYPE",
1490   [The type of system you are compiling for; sets 'system-type'.])
1491
1492
1493 pre_PKG_CONFIG_CFLAGS=$CFLAGS
1494 pre_PKG_CONFIG_LIBS=$LIBS
1495
1496 PKG_PROG_PKG_CONFIG(0.9.0)
1497
1498 dnl EMACS_CHECK_MODULES(GSTUFF, gtk+-2.0 >= 1.3 glib = 1.3.4)
1499 dnl acts like PKG_CHECK_MODULES(GSTUFF, gtk+-2.0 >= 1.3 glib = 1.3.4,
1500 dnl HAVE_GSTUFF=yes, HAVE_GSTUFF=no) -- see pkg-config man page --
1501 dnl except that it postprocesses CFLAGS as needed for --enable-gcc-warnings.
1502 dnl EMACS_CHECK_MODULES accepts optional 3rd and 4th arguments that
1503 dnl can take the place of the default HAVE_GSTUFF=yes and HAVE_GSTUFF=no
1504 dnl actions.
1505 AC_DEFUN([EMACS_CHECK_MODULES],
1506   [PKG_CHECK_MODULES([$1], [$2],
1507      [$1_CFLAGS=`AS_ECHO(["$$1_CFLAGS"]) | sed -e "$edit_cflags"`
1508       m4_default([$3], [HAVE_$1=yes])],
1509      [m4_default([$4], [HAVE_$1=no])])])
1510
1511 HAVE_SOUND=no
1512 if test "${with_sound}" != "no"; then
1513   # Sound support for GNU/Linux, the free BSDs, MinGW, and Cygwin.
1514   AC_CHECK_HEADERS([machine/soundcard.h sys/soundcard.h soundcard.h mmsystem.h],
1515     have_sound_header=yes, [], [
1516     #ifdef __MINGW32__
1517     #define WIN32_LEAN_AND_MEAN
1518     #include <windows.h>
1519     #endif
1520     ])
1521   test "${with_sound}" = "oss" && test "${have_sound_header}" != "yes" && \
1522     AC_MSG_ERROR([OSS sound support requested but not found.])
1523
1524   if test "${with_sound}" = "bsd-ossaudio" || test "${with_sound}" = "yes"; then
1525     # Emulation library used on NetBSD.
1526     AC_CHECK_LIB(ossaudio, _oss_ioctl, LIBSOUND=-lossaudio, LIBSOUND=)
1527     test "${with_sound}" = "bsd-ossaudio" && test -z "$LIBSOUND" && \
1528       AC_MSG_ERROR([bsd-ossaudio sound support requested but not found.])
1529     dnl FIXME?  If we did find ossaudio, should we set with_sound=bsd-ossaudio?
1530     dnl Traditionally, we go on to check for alsa too.  Does that make sense?
1531   fi
1532   AC_SUBST(LIBSOUND)
1533
1534   if test "${with_sound}" = "alsa" || test "${with_sound}" = "yes"; then
1535     ALSA_REQUIRED=1.0.0
1536     ALSA_MODULES="alsa >= $ALSA_REQUIRED"
1537     EMACS_CHECK_MODULES([ALSA], [$ALSA_MODULES])
1538     if test $HAVE_ALSA = yes; then
1539       SAVE_CFLAGS="$CFLAGS"
1540       SAVE_LIBS="$LIBS"
1541       CFLAGS="$ALSA_CFLAGS $CFLAGS"
1542       LIBS="$ALSA_LIBS $LIBS"
1543       AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <asoundlib.h>]], [[snd_lib_error_set_handler (0);]])],
1544                       emacs_alsa_normal=yes,
1545                     emacs_alsa_normal=no)
1546       if test "$emacs_alsa_normal" != yes; then
1547         AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <alsa/asoundlib.h>]],
1548                        [[snd_lib_error_set_handler (0);]])],
1549                        emacs_alsa_subdir=yes,
1550                      emacs_alsa_subdir=no)
1551         if test "$emacs_alsa_subdir" != yes; then
1552           AC_MSG_ERROR([pkg-config found alsa, but it does not compile.  See config.log for error messages.])
1553         fi
1554         ALSA_CFLAGS="$ALSA_CFLAGS -DALSA_SUBDIR_INCLUDE"
1555       fi
1556
1557       CFLAGS="$SAVE_CFLAGS"
1558       LIBS="$SAVE_LIBS"
1559       LIBSOUND="$LIBSOUND $ALSA_LIBS"
1560       CFLAGS_SOUND="$CFLAGS_SOUND $ALSA_CFLAGS"
1561       AC_DEFINE(HAVE_ALSA, 1, [Define to 1 if ALSA is available.])
1562     elif test "${with_sound}" = "alsa"; then
1563       AC_MSG_ERROR([ALSA sound support requested but not found.])
1564     fi
1565   fi                            dnl with_sound = alsa|yes
1566
1567   dnl Define HAVE_SOUND if we have sound support.  We know it works and
1568   dnl compiles only on the specified platforms.  For others, it
1569   dnl probably doesn't make sense to try.
1570   dnl FIXME So surely we should bypass this whole section if not using
1571   dnl one of these platforms?
1572   if test x$have_sound_header = xyes || test $HAVE_ALSA = yes; then
1573      case "$opsys" in
1574        dnl defined __FreeBSD__ || defined __NetBSD__ || defined __linux__
1575        dnl Adjust the --with-sound help text if you change this.
1576        gnu-linux|freebsd|netbsd|mingw32|cygwin)
1577          AC_DEFINE(HAVE_SOUND, 1, [Define to 1 if you have sound support.])
1578          HAVE_SOUND=yes
1579          ;;
1580      esac
1581   fi
1582
1583   AC_SUBST(CFLAGS_SOUND)
1584 fi
1585
1586 dnl checks for header files
1587 AC_CHECK_HEADERS_ONCE(
1588   sys/systeminfo.h
1589   sys/sysinfo.h
1590   coff.h pty.h
1591   sys/resource.h
1592   sys/utsname.h pwd.h utmp.h util.h)
1593
1594 AC_MSG_CHECKING(if personality LINUX32 can be set)
1595 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/personality.h>]], [[personality (PER_LINUX32)]])],
1596                emacs_cv_personality_linux32=yes,
1597                emacs_cv_personality_linux32=no)
1598 AC_MSG_RESULT($emacs_cv_personality_linux32)
1599
1600 if test $emacs_cv_personality_linux32 = yes; then
1601   AC_DEFINE(HAVE_PERSONALITY_LINUX32, 1,
1602             [Define to 1 if personality LINUX32 can be set.])
1603 fi
1604
1605 # Note that Solaris has sys/sysinfo.h which defines struct
1606 # sysinfo as well.  To make sure that we're using GNU/Linux
1607 # sysinfo, we explicitly set one of its fields.
1608 if test "$ac_cv_header_sys_sysinfo_h" = yes; then
1609   AC_MSG_CHECKING([if Linux sysinfo may be used])
1610   AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/sysinfo.h>]],
1611                                      [[struct sysinfo si;
1612                                        si.totalram = 0;
1613                                        sysinfo (&si)]])],
1614     emacs_cv_linux_sysinfo=yes, emacs_cv_linux_sysinfo=no)
1615   AC_MSG_RESULT($emacs_cv_linux_sysinfo)
1616   if test $emacs_cv_linux_sysinfo = yes; then
1617     AC_DEFINE([HAVE_LINUX_SYSINFO], 1, [Define to 1 if you have Linux sysinfo function.])
1618     AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/sysinfo.h>]],
1619                                        [[struct sysinfo si; return si.mem_unit]])],
1620       AC_DEFINE(LINUX_SYSINFO_UNIT, 1,
1621                 [Define to 1 if Linux sysinfo sizes are in multiples of mem_unit bytes.]))
1622   fi
1623 fi
1624
1625 dnl On Solaris 8 there's a compilation warning for term.h because
1626 dnl it doesn't define 'bool'.
1627 AC_CHECK_HEADERS(term.h, , , -)
1628 AC_HEADER_TIME
1629 AC_CHECK_DECLS([sys_siglist], [], [], [[#include <signal.h>
1630                                       ]])
1631 if test $ac_cv_have_decl_sys_siglist != yes; then
1632   # For Tru64, at least:
1633   AC_CHECK_DECLS([__sys_siglist], [], [], [[#include <signal.h>
1634                                           ]])
1635 fi
1636 AC_HEADER_SYS_WAIT
1637
1638 AC_CHECK_HEADERS_ONCE(sys/socket.h)
1639 AC_CHECK_HEADERS(net/if.h, , , [AC_INCLUDES_DEFAULT
1640 #if HAVE_SYS_SOCKET_H
1641 #include <sys/socket.h>
1642 #endif])
1643 AC_CHECK_HEADERS(ifaddrs.h, , , [AC_INCLUDES_DEFAULT
1644 #if HAVE_SYS_SOCKET_H
1645 #include <sys/socket.h>
1646 #endif])
1647 AC_CHECK_HEADERS(net/if_dl.h, , , [AC_INCLUDES_DEFAULT
1648 #if HAVE_SYS_SOCKET_H
1649 #include <sys/socket.h>
1650 #endif])
1651
1652 dnl checks for structure members
1653 AC_CHECK_MEMBERS([struct ifreq.ifr_flags, struct ifreq.ifr_hwaddr,
1654                   struct ifreq.ifr_netmask, struct ifreq.ifr_broadaddr,
1655                   struct ifreq.ifr_addr,
1656                   struct ifreq.ifr_addr.sa_len], , ,
1657                  [AC_INCLUDES_DEFAULT
1658 #if HAVE_SYS_SOCKET_H
1659 #include <sys/socket.h>
1660 #endif
1661 #if HAVE_NET_IF_H
1662 #include <net/if.h>
1663 #endif])
1664
1665 dnl Check for endianness.
1666 dnl AC_C_BIGENDIAN is done by gnulib.
1667
1668 dnl check for Make feature
1669
1670 AUTO_DEPEND=no
1671 dnl check if we have GCC and autodepend is on.
1672 if test "$GCC" = yes && test "$ac_enable_autodepend" = yes; then
1673    AC_MSG_CHECKING([whether gcc understands -MMD -MF])
1674    SAVE_CFLAGS="$CFLAGS"
1675    CFLAGS="$CFLAGS -MMD -MF deps.d -MP"
1676    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])], , ac_enable_autodepend=no)
1677    CFLAGS="$SAVE_CFLAGS"
1678    test -f deps.d || ac_enable_autodepend=no
1679    rm -rf deps.d
1680    AC_MSG_RESULT([$ac_enable_autodepend])
1681    if test $ac_enable_autodepend = yes; then
1682       AUTO_DEPEND=yes
1683    fi
1684 fi
1685 AC_SUBST(AUTO_DEPEND)
1686
1687 dnl checks for operating system services
1688 AC_SYS_LONG_FILE_NAMES
1689
1690 #### Choose a window system.
1691
1692 ## We leave window_system equal to none if
1693 ## we end up building without one.  Any new window system should
1694 ## set window_system to an appropriate value and add objects to
1695 ## window-system-specific substs.
1696
1697 window_system=none
1698 AC_PATH_X
1699 if test "$no_x" != yes; then
1700   window_system=x11
1701 fi
1702
1703 LD_SWITCH_X_SITE_RPATH=
1704 if test "${x_libraries}" != NONE; then
1705   if test -n "${x_libraries}"; then
1706     LD_SWITCH_X_SITE=-L`AS_ECHO(["$x_libraries"]) | sed -e 's/:/ -L/g'`
1707     LD_SWITCH_X_SITE_RPATH=-Wl,-rpath,`
1708       AS_ECHO(["$x_libraries"]) | sed -e 's/:/ -Wl,-rpath,/g'
1709     `
1710   fi
1711   x_default_search_path=""
1712   x_search_path=${x_libraries}
1713   if test -z "${x_search_path}"; then
1714     x_search_path=/usr/lib
1715   fi
1716   for x_library in `AS_ECHO(["$x_search_path:"]) | \
1717                     sed -e "s/:/ /g" -e p -e "s:/lib[[^ /]]* :/share :g"`; do
1718     x_search_path="\
1719 ${x_library}/X11/%L/%T/%N%C%S:\
1720 ${x_library}/X11/%l/%T/%N%C%S:\
1721 ${x_library}/X11/%T/%N%C%S:\
1722 ${x_library}/X11/%L/%T/%N%S:\
1723 ${x_library}/X11/%l/%T/%N%S:\
1724 ${x_library}/X11/%T/%N%S"
1725     if test x"${x_default_search_path}" = x; then
1726       x_default_search_path=${x_search_path}
1727     else
1728       x_default_search_path="${x_search_path}:${x_default_search_path}"
1729     fi
1730   done
1731 fi
1732 AC_SUBST(LD_SWITCH_X_SITE_RPATH)
1733
1734 if test "${x_includes}" != NONE && test -n "${x_includes}"; then
1735   C_SWITCH_X_SITE=$isystem`AS_ECHO(["$x_includes"]) | sed -e "s/:/ $isystem/g"`
1736 fi
1737
1738 if test x"${x_includes}" = x; then
1739   bitmapdir=/usr/include/X11/bitmaps
1740 else
1741   # accumulate include directories that have X11 bitmap subdirectories
1742   bmd_acc=
1743   for bmd in `AS_ECHO(["$x_includes"]) | sed -e 's/:/ /g'`; do
1744     if test -d "${bmd}/X11/bitmaps"; then
1745       bmd_acc="${bmd_acc}:${bmd}/X11/bitmaps"
1746     fi
1747     if test -d "${bmd}/bitmaps"; then
1748       bmd_acc="${bmd_acc}:${bmd}/bitmaps"
1749     fi
1750   done
1751   bitmapdir=${bmd_acc#:}
1752 fi
1753
1754 test "${with_ns}" = maybe && test "${opsys}" != darwin && with_ns=no
1755 HAVE_NS=no
1756 NS_GNUSTEP_CONFIG=no
1757 NS_IMPL_COCOA=no
1758 NS_IMPL_GNUSTEP=no
1759 tmp_CPPFLAGS="$CPPFLAGS"
1760 tmp_CFLAGS="$CFLAGS"
1761 CPPFLAGS="$CPPFLAGS -x objective-c"
1762 CFLAGS="$CFLAGS -x objective-c"
1763 GNU_OBJC_CFLAGS=
1764 LIBS_GNUSTEP=
1765 if test "${with_ns}" != no; then
1766   if test "${opsys}" = darwin; then
1767      NS_IMPL_COCOA=yes
1768      ns_appdir=`pwd`/nextstep/Emacs.app
1769      ns_appbindir=${ns_appdir}/Contents/MacOS
1770      ns_appresdir=${ns_appdir}/Contents/Resources
1771      ns_appsrc=Cocoa/Emacs.base
1772      ns_fontfile=macfont.o
1773   elif flags=$( (gnustep-config --objc-flags) 2>/dev/null); then
1774      NS_IMPL_GNUSTEP=yes
1775      NS_GNUSTEP_CONFIG=yes
1776      GNU_OBJC_CFLAGS=$flags
1777      LIBS_GNUSTEP=$(gnustep-config --gui-libs) || exit
1778   elif test -f $GNUSTEP_CONFIG_FILE; then
1779      NS_IMPL_GNUSTEP=yes
1780      dnl FIXME sourcing this several times in subshells seems inefficient.
1781      GNUSTEP_SYSTEM_HEADERS=$(
1782        . $GNUSTEP_CONFIG_FILE
1783        AS_ECHO(["$GNUSTEP_SYSTEM_HEADERS"])
1784      )
1785      GNUSTEP_SYSTEM_LIBRARIES=$(
1786        . $GNUSTEP_CONFIG_FILE
1787        AS_ECHO(["$GNUSTEP_SYSTEM_LIBRARIES"])
1788      )
1789      dnl I seemed to need these as well with GNUstep-startup 0.25.
1790      GNUSTEP_LOCAL_HEADERS=$(
1791        . $GNUSTEP_CONFIG_FILE
1792        AS_ECHO(["$GNUSTEP_LOCAL_HEADERS"])
1793      )
1794      GNUSTEP_LOCAL_LIBRARIES=$(
1795        . $GNUSTEP_CONFIG_FILE
1796        AS_ECHO(["$GNUSTEP_LOCAL_LIBRARIES"])
1797      )
1798      test "x${GNUSTEP_LOCAL_HEADERS}" != "x" && \
1799        GNUSTEP_LOCAL_HEADERS="-I${GNUSTEP_LOCAL_HEADERS}"
1800      test "x${GNUSTEP_LOCAL_LIBRARIES}" != "x" && \
1801        GNUSTEP_LOCAL_LIBRARIES="-L${GNUSTEP_LOCAL_LIBRARIES}"
1802      CPPFLAGS="$CPPFLAGS -I${GNUSTEP_SYSTEM_HEADERS} ${GNUSTEP_LOCAL_HEADERS}"
1803      CFLAGS="$CFLAGS -I${GNUSTEP_SYSTEM_HEADERS} ${GNUSTEP_LOCAL_HEADERS}"
1804      LDFLAGS="$LDFLAGS -L${GNUSTEP_SYSTEM_LIBRARIES} ${GNUSTEP_LOCAL_LIBRARIES}"
1805      LIBS_GNUSTEP="-lgnustep-gui -lgnustep-base -lobjc -lpthread"
1806      dnl GNUstep defines BASE_NATIVE_OBJC_EXCEPTIONS to 0 or 1.
1807      dnl If they had chosen to either define it or not, we could have
1808      dnl just used AC_CHECK_DECL here.
1809      AC_CACHE_CHECK(if GNUstep defines BASE_NATIVE_OBJC_EXCEPTIONS,
1810        emacs_cv_objc_exceptions,
1811 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <GNUstepBase/GSConfig.h>]],
1812 [[#if defined BASE_NATIVE_OBJC_EXCEPTIONS && BASE_NATIVE_OBJC_EXCEPTIONS > 0
1813 1;
1814 #else
1815 fail;
1816 #endif]])], emacs_cv_objc_exceptions=yes, emacs_cv_objc_exceptions=no ) )
1817      if test $emacs_cv_objc_exceptions = yes; then
1818        dnl _NATIVE_OBJC_EXCEPTIONS is used by the GNUstep headers.
1819        AC_DEFINE(_NATIVE_OBJC_EXCEPTIONS, 1,
1820          [Define if GNUstep uses ObjC exceptions.])
1821        GNU_OBJC_CFLAGS="-fobjc-exceptions"
1822      fi
1823   fi
1824   if test $NS_IMPL_GNUSTEP = yes; then
1825      ns_appdir=`pwd`/nextstep/Emacs.app
1826      ns_appbindir=${ns_appdir}
1827      ns_appresdir=${ns_appdir}/Resources
1828      ns_appsrc=GNUstep/Emacs.base
1829      ns_fontfile=nsfont.o
1830   fi
1831
1832   dnl This is only used while we test the NS headers, it gets reset below.
1833   CPPFLAGS="$CPPFLAGS $GNU_OBJC_CFLAGS"
1834   CFLAGS="$CFLAGS $GNU_OBJC_CFLAGS"
1835
1836   AC_CHECK_HEADER([AppKit/AppKit.h], [HAVE_NS=yes],
1837                   [AC_MSG_ERROR([The include files (AppKit/AppKit.h etc) that
1838 are required for a Nextstep build are missing or cannot be compiled.
1839 Either fix this, or re-configure with the option '--without-ns'.])])
1840
1841   macfont_file=""
1842   if test "${NS_IMPL_COCOA}" = "yes"; then
1843     AC_MSG_CHECKING([for OSX 10.6 or newer])
1844     AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <AppKit/AppKit.h>],
1845                                      [
1846 #ifdef MAC_OS_X_VERSION_MAX_ALLOWED
1847 #if MAC_OS_X_VERSION_MAX_ALLOWED >= 1060
1848  ; /* OK */
1849 #else
1850  error "OSX 10.6 or newer required";
1851 #endif
1852 #endif
1853                     ])],
1854                     ns_osx_have_106=yes,
1855                     ns_osx_have_106=no)
1856     AC_MSG_RESULT([$ns_osx_have_106])
1857
1858     if test $ns_osx_have_106 = no; then
1859        AC_MSG_ERROR([OSX 10.6 or newer is required]);
1860     fi
1861   fi
1862 fi
1863
1864 AC_SUBST(LIBS_GNUSTEP)
1865
1866 INSTALL_ARCH_INDEP_EXTRA=install-etc
1867 ns_self_contained=no
1868 NS_OBJ=
1869 NS_OBJC_OBJ=
1870 if test "${HAVE_NS}" = yes; then
1871   if test "$with_toolkit_scroll_bars" = "no"; then
1872     AC_MSG_ERROR([Non-toolkit scroll bars are not implemented for Nextstep.])
1873   fi
1874
1875   window_system=nextstep
1876   # set up packaging dirs
1877   if test "${EN_NS_SELF_CONTAINED}" = yes; then
1878      ns_self_contained=yes
1879      prefix=${ns_appresdir}
1880      exec_prefix=${ns_appbindir}
1881      dnl This one isn't really used, only archlibdir is.
1882      libexecdir="\${ns_appbindir}/libexec"
1883      archlibdir="\${ns_appbindir}/libexec"
1884      etcdocdir="\${ns_appresdir}/etc"
1885      etcdir="\${ns_appresdir}/etc"
1886      dnl FIXME maybe set datarootdir instead.
1887      dnl That would also get applications, icons, man.
1888      infodir="\${ns_appresdir}/info"
1889      mandir="\${ns_appresdir}/man"
1890      lispdir="\${ns_appresdir}/lisp"
1891      test "$locallisppathset" = no && locallisppath=""
1892      INSTALL_ARCH_INDEP_EXTRA=
1893   fi
1894
1895   NS_OBJC_OBJ="nsterm.o nsfns.o nsmenu.o nsselect.o nsimage.o $ns_fontfile"
1896 fi
1897 CFLAGS="$tmp_CFLAGS"
1898 CPPFLAGS="$tmp_CPPFLAGS"
1899 AC_SUBST(INSTALL_ARCH_INDEP_EXTRA)
1900 AC_SUBST(ns_self_contained)
1901 AC_SUBST(NS_OBJ)
1902 AC_SUBST(NS_OBJC_OBJ)
1903
1904 HAVE_W32=no
1905 W32_OBJ=
1906 W32_LIBS=
1907 EMACSRES=
1908 CLIENTRES=
1909 CLIENTW=
1910 W32_RES_LINK=
1911 EMACS_MANIFEST=
1912 UPDATE_MANIFEST=
1913 if test "${with_w32}" != no; then
1914   case "${opsys}" in
1915     cygwin)
1916       AC_CHECK_HEADER([windows.h], [HAVE_W32=yes],
1917              [AC_MSG_ERROR(['--with-w32' was specified, but windows.h
1918                    cannot be found.])])
1919     ;;
1920     mingw32)
1921     ## Using --with-w32 with MinGW is a no-op, but we allow it.
1922     ;;
1923     *)
1924       AC_MSG_ERROR([Using w32 with an autotools build is only supported for Cygwin and MinGW32.])
1925     ;;
1926   esac
1927 fi
1928
1929 if test "${opsys}" = "mingw32"; then
1930   AC_MSG_CHECKING([whether Windows API headers are recent enough])
1931   AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1932      #include <windows.h>
1933      #include <usp10.h>]],
1934    [[PIMAGE_NT_HEADERS pHeader;
1935      PIMAGE_SECTION_HEADER pSection = IMAGE_FIRST_SECTION(pHeader)]])],
1936    [emacs_cv_w32api=yes
1937     HAVE_W32=yes],
1938    emacs_cv_w32api=no)
1939   AC_MSG_RESULT($emacs_cv_w32api)
1940   if test "${emacs_cv_w32api}" = "no"; then
1941     AC_MSG_ERROR([the Windows API headers are too old to support this build.])
1942   fi
1943 fi
1944
1945 FIRSTFILE_OBJ=
1946 NTDIR=
1947 LIBS_ECLIENT=
1948 LIB_WSOCK32=
1949 NTLIB=
1950 CM_OBJ="cm.o"
1951 XARGS_LIMIT=
1952 if test "${HAVE_W32}" = "yes"; then
1953   AC_DEFINE(HAVE_NTGUI, 1, [Define to use native MS Windows GUI.])
1954   if test "$with_toolkit_scroll_bars" = "no"; then
1955     AC_MSG_ERROR([Non-toolkit scroll bars are not implemented for w32 build.])
1956   fi
1957   AC_CHECK_TOOL(WINDRES, [windres],
1958                 [AC_MSG_ERROR([No resource compiler found.])])
1959   W32_OBJ="w32fns.o w32menu.o w32reg.o w32font.o w32term.o"
1960   W32_OBJ="$W32_OBJ w32xfns.o w32select.o w32uniscribe.o"
1961   EMACSRES="emacs.res"
1962   case "$canonical" in
1963     x86_64-*-*) EMACS_MANIFEST="emacs-x64.manifest" ;;
1964     *) EMACS_MANIFEST="emacs-x86.manifest" ;;
1965   esac
1966   dnl Construct something of the form "24,4,0,0" with 4 components.
1967   comma_version=`echo "${PACKAGE_VERSION}.0.0" | sed -e 's/\./,/g' -e 's/^\([[^,]]*,[[^,]]*,[[^,]]*,[[^,]]*\).*/\1/'`
1968
1969   comma_space_version=`echo "$comma_version" | sed 's/,/, /g'`
1970   AC_SUBST(comma_version)
1971   AC_SUBST(comma_space_version)
1972   AC_CONFIG_FILES([nt/emacs.rc nt/emacsclient.rc])
1973   if test "${opsys}" = "cygwin"; then
1974     W32_LIBS="$W32_LIBS -lkernel32 -luser32 -lgdi32 -lole32 -lcomdlg32"
1975     W32_LIBS="$W32_LIBS -lusp10 -lcomctl32 -lwinspool"
1976     # Tell the linker that emacs.res is an object (which we compile from
1977     # the rc file), not a linker script.
1978     W32_RES_LINK="-Wl,emacs.res"
1979   else
1980     UPDATE_MANIFEST=update-game-score.exe.manifest
1981     W32_OBJ="$W32_OBJ w32.o w32console.o w32heap.o w32inevt.o w32proc.o"
1982     W32_LIBS="$W32_LIBS -lwinmm -lgdi32 -lcomdlg32"
1983     W32_LIBS="$W32_LIBS -lmpr -lwinspool -lole32 -lcomctl32 -lusp10"
1984     W32_RES_LINK="\$(EMACSRES)"
1985     CLIENTRES="emacsclient.res"
1986     CLIENTW="emacsclientw\$(EXEEXT)"
1987     FIRSTFILE_OBJ=firstfile.o
1988     NTDIR=nt
1989     CM_OBJ=
1990     LIBS_ECLIENT="-lcomctl32"
1991     LIB_WSOCK32="-lwsock32"
1992     NTLIB="ntlib.$ac_objext"
1993     XARGS_LIMIT="-s 10000"
1994   fi
1995 fi
1996 AC_SUBST(W32_OBJ)
1997 AC_SUBST(W32_LIBS)
1998 AC_SUBST(EMACSRES)
1999 AC_SUBST(EMACS_MANIFEST)
2000 AC_SUBST(UPDATE_MANIFEST)
2001 AC_SUBST(CLIENTRES)
2002 AC_SUBST(CLIENTW)
2003 AC_SUBST(W32_RES_LINK)
2004 AC_SUBST(FIRSTFILE_OBJ)
2005 AC_SUBST(NTDIR)
2006 AC_SUBST(CM_OBJ)
2007 AC_SUBST(LIBS_ECLIENT)
2008 AC_SUBST(LIB_WSOCK32)
2009 AC_SUBST(NTLIB)
2010 AC_SUBST(XARGS_LIMIT)
2011
2012 if test "${HAVE_W32}" = "yes"; then
2013   window_system=w32
2014   with_xft=no
2015 fi
2016
2017 ## $window_system is now set to the window system we will
2018 ## ultimately use.
2019
2020 if test "$window_system" = none && test "$gl_gcc_warnings" = yes; then
2021    # Too many warnings for now.
2022    nw=
2023    nw="$nw -Wsuggest-attribute=noreturn"
2024    gl_MANYWARN_COMPLEMENT([WARN_CFLAGS], [$WARN_CFLAGS], [$nw])
2025
2026    gl_WARN_ADD([-Wno-unused-variable])
2027    gl_WARN_ADD([-Wno-unused-but-set-variable])
2028    gl_WARN_ADD([-Wno-unused-but-set-parameter])
2029 fi
2030
2031 term_header=
2032 HAVE_X_WINDOWS=no
2033 HAVE_X11=no
2034 USE_X_TOOLKIT=none
2035
2036 case "${window_system}" in
2037   x11 )
2038     HAVE_X_WINDOWS=yes
2039     HAVE_X11=yes
2040     term_header=xterm.h
2041     case "${with_x_toolkit}" in
2042       athena | lucid ) USE_X_TOOLKIT=LUCID ;;
2043       motif ) USE_X_TOOLKIT=MOTIF ;;
2044       gtk ) with_gtk=yes
2045             term_header=gtkutil.h
2046 dnl Don't set this for GTK.  A lot of tests below assumes Xt when
2047 dnl USE_X_TOOLKIT is set.
2048             USE_X_TOOLKIT=none ;;
2049       gtk2 ) with_gtk2=yes
2050              term_header=gtkutil.h
2051              USE_X_TOOLKIT=none ;;
2052       gtk3 ) with_gtk3=yes
2053              term_header=gtkutil.h
2054              USE_X_TOOLKIT=none ;;
2055       no ) USE_X_TOOLKIT=none ;;
2056 dnl If user did not say whether to use a toolkit, make this decision later:
2057 dnl use the toolkit if we have gtk, or X11R5 or newer.
2058       * ) USE_X_TOOLKIT=maybe ;;
2059     esac
2060   ;;
2061   nextstep )
2062     term_header=nsterm.h
2063   ;;
2064   w32 )
2065     term_header=w32term.h
2066   ;;
2067 esac
2068
2069 if test "$window_system" = none && test "X$with_x" != "Xno"; then
2070    AC_CHECK_PROG(HAVE_XSERVER, X, true, false)
2071    if test "$HAVE_XSERVER" = true ||
2072       test -n "$DISPLAY" ||
2073       {
2074         for emacs_libX11 in /usr/lib/libX11.*; do break; done
2075         test "$emacs_libX11" != '/usr/lib/libX11.*'
2076       }
2077    then
2078         AC_MSG_ERROR([You seem to be running X, but no X development libraries
2079 were found.  You should install the relevant development files for X
2080 and for the toolkit you want, such as Gtk+ or Motif.  Also make
2081 sure you have development files for image handling, i.e.
2082 tiff, gif, jpeg, png and xpm.
2083 If you are sure you want Emacs compiled without X window support, pass
2084   --without-x
2085 to configure.])
2086    fi
2087 fi
2088
2089 # Does the opsystem file prohibit the use of the GNU malloc?
2090 # Assume not, until told otherwise.
2091 GNU_MALLOC=yes
2092
2093 AC_CACHE_CHECK(
2094   [whether malloc is Doug Lea style],
2095   [emacs_cv_var_doug_lea_malloc],
2096   [emacs_cv_var_doug_lea_malloc=no
2097    dnl Hooks do not work with address sanitization.
2098    if test "$emacs_cv_sanitize_address" != yes; then
2099      AC_LINK_IFELSE(
2100        [AC_LANG_PROGRAM(
2101           [[#include <malloc.h>
2102             static void hook (void) {}]],
2103           [[malloc_set_state (malloc_get_state ());
2104             __after_morecore_hook = hook;
2105             __malloc_initialize_hook = hook;]])],
2106        [emacs_cv_var_doug_lea_malloc=yes])
2107    fi])
2108 doug_lea_malloc=$emacs_cv_var_doug_lea_malloc
2109
2110 system_malloc=$emacs_cv_sanitize_address
2111
2112 hybrid_malloc=
2113
2114 case "$opsys" in
2115   ## darwin ld insists on the use of malloc routines in the System framework.
2116   darwin | mingw32 | nacl | sol2-10) system_malloc=yes ;;
2117   cygwin) hybrid_malloc=yes;;
2118 esac
2119
2120 GMALLOC_OBJ=
2121 if test "${system_malloc}" = "yes"; then
2122   AC_DEFINE([SYSTEM_MALLOC], 1,
2123     [Define to 1 to use the system memory allocator, even if it is not
2124      Doug Lea style.])
2125   GNU_MALLOC=no
2126   GNU_MALLOC_reason="
2127     (The GNU allocators don't work with this system configuration.)"
2128   VMLIMIT_OBJ=
2129 elif test "$hybrid_malloc" = yes; then
2130   AC_DEFINE(HYBRID_MALLOC, 1,
2131     [Define to use gmalloc before dumping and the system malloc after.])
2132   GNU_MALLOC=
2133   GNU_MALLOC_reason="only before dumping"
2134   GMALLOC_OBJ=gmalloc.o
2135   VMLIMIT_OBJ=
2136 else
2137   test "$doug_lea_malloc" != "yes" && GMALLOC_OBJ=gmalloc.o
2138   VMLIMIT_OBJ=vm-limit.o
2139
2140   AC_CHECK_HEADERS([sys/vlimit.h])
2141   AC_CACHE_CHECK([for data_start], [emacs_cv_data_start],
2142     [AC_LINK_IFELSE(
2143        [AC_LANG_PROGRAM(
2144          [[extern char data_start[]; char ch;]],
2145          [[return data_start < &ch;]])],
2146        [emacs_cv_data_start=yes],
2147        [emacs_cv_data_start=no])])
2148   if test $emacs_cv_data_start = yes; then
2149     AC_DEFINE([HAVE_DATA_START], 1,
2150       [Define to 1 if data_start is the address of the start
2151        of the main data segment.])
2152   fi
2153 fi
2154 AC_SUBST(GMALLOC_OBJ)
2155 AC_SUBST(VMLIMIT_OBJ)
2156
2157 if test "$doug_lea_malloc" = "yes" ; then
2158   if test "$GNU_MALLOC" = yes ; then
2159     GNU_MALLOC_reason="
2160       (Using Doug Lea's new malloc from the GNU C Library.)"
2161   fi
2162   AC_DEFINE(DOUG_LEA_MALLOC, 1,
2163     [Define to 1 if the system memory allocator is Doug Lea style,
2164      with malloc hooks and malloc_set_state.])
2165
2166   ## Use mmap directly for allocating larger buffers.
2167   ## FIXME this comes from src/s/{gnu,gnu-linux}.h:
2168   ## #ifdef DOUG_LEA_MALLOC; #undef REL_ALLOC; #endif
2169   ## Does the AC_FUNC_MMAP test below make this check unnecessary?
2170   case "$opsys" in
2171     mingw32|gnu*) REL_ALLOC=no ;;
2172   esac
2173 fi
2174
2175 if test x"${REL_ALLOC}" = x; then
2176   REL_ALLOC=${GNU_MALLOC}
2177 fi
2178
2179 use_mmap_for_buffers=no
2180 case "$opsys" in
2181   cygwin|mingw32|freebsd|irix6-5) use_mmap_for_buffers=yes ;;
2182 esac
2183
2184 AC_FUNC_MMAP
2185 if test $use_mmap_for_buffers = yes; then
2186   AC_DEFINE(USE_MMAP_FOR_BUFFERS, 1, [Define to use mmap to allocate buffer text.])
2187   REL_ALLOC=no
2188 fi
2189
2190 LIBS="$LIBS_SYSTEM $LIBS"
2191
2192 dnl FIXME replace main with a function we actually want from this library.
2193 AC_CHECK_LIB(Xbsd, main, LD_SWITCH_X_SITE="$LD_SWITCH_X_SITE -lXbsd")
2194
2195 dnl Check for the POSIX thread library.
2196 LIB_PTHREAD=
2197 AC_CHECK_HEADERS_ONCE(pthread.h)
2198 if test "$ac_cv_header_pthread_h" && test "$opsys" != "mingw32"; then
2199   AC_CACHE_CHECK([for pthread library],
2200     [emacs_cv_pthread_lib],
2201     [emacs_cv_pthread_lib=no
2202      OLD_LIBS=$LIBS
2203      for emacs_pthread_lib in 'none needed' -lpthread; do
2204        case $emacs_pthread_lib in
2205          -*) LIBS="$OLD_LIBS $emacs_pthread_lib";;
2206        esac
2207        AC_LINK_IFELSE(
2208          [AC_LANG_PROGRAM(
2209             [[#include <pthread.h>
2210               #include <signal.h>
2211               sigset_t old_mask, new_mask;
2212               void noop (void) {}]],
2213             [[pthread_t th = pthread_self ();
2214               int status = 0;
2215               status += pthread_create (&th, 0, 0, 0);
2216               status += pthread_sigmask (SIG_BLOCK, &new_mask, &old_mask);
2217               status += pthread_kill (th, 0);
2218               #if ! (defined SYSTEM_MALLOC || defined HYBRID_MALLOC \
2219                      || defined DOUG_LEA_MALLOC)
2220               /* Test for pthread_atfork only if gmalloc uses it,
2221                  as older-style hosts like MirBSD 10 lack it.  */
2222               status += pthread_atfork (noop, noop, noop);
2223               #endif
2224               return status;]])],
2225          [emacs_cv_pthread_lib=$emacs_pthread_lib])
2226        LIBS=$OLD_LIBS
2227        if test "$emacs_cv_pthread_lib" != no; then
2228          break
2229        fi
2230      done])
2231   if test "$emacs_cv_pthread_lib" != no; then
2232     AC_DEFINE([HAVE_PTHREAD], 1, [Define to 1 if you have POSIX threads.])
2233     case $emacs_cv_pthread_lib in
2234       -*) LIB_PTHREAD=$emacs_cv_pthread_lib;;
2235     esac
2236     ac_cv_func_pthread_sigmask=yes
2237     # Some systems optimize for single-threaded programs by default, and
2238     # need special flags to disable these optimizations. For example, the
2239     # definition of 'errno' in <errno.h>.
2240     case $opsys in
2241       hpux* | sol*)
2242         AC_DEFINE([_REENTRANT], 1,
2243           [Define to 1 if your system requires this in multithreaded code.]);;
2244       aix4-2)
2245         AC_DEFINE([_THREAD_SAFE], 1,
2246           [Define to 1 if your system requires this in multithreaded code.]);;
2247     esac
2248   fi
2249 fi
2250 AC_SUBST([LIB_PTHREAD])
2251
2252 dnl Check for need for bigtoc support on IBM AIX
2253
2254 case ${host_os} in
2255 aix*)
2256   AC_CACHE_CHECK([for -bbigtoc option], [gdb_cv_bigtoc], [
2257     case $GCC in
2258     yes) gdb_cv_bigtoc=-Wl,-bbigtoc ;;
2259     *) gdb_cv_bigtoc=-bbigtoc ;;
2260     esac
2261
2262     LDFLAGS=$LDFLAGS\ $gdb_cv_bigtoc
2263     AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[int i;]])], [], [gdb_cv_bigtoc=])
2264   ])
2265   ;;
2266 esac
2267
2268 # Change CFLAGS, CPPFLAGS, and LIBS temporarily so that C_SWITCH_X_SITE
2269 # is for the tests that follow.  We set them back later on.
2270
2271 REAL_CFLAGS="$CFLAGS"
2272 REAL_CPPFLAGS="$CPPFLAGS"
2273 REAL_LIBS="$LIBS"
2274
2275 if test "${HAVE_X11}" = "yes"; then
2276   DEFS="$C_SWITCH_X_SITE $DEFS"
2277   LDFLAGS="$LDFLAGS $LD_SWITCH_X_SITE"
2278   LIBS="-lX11 $LIBS"
2279   CFLAGS="$C_SWITCH_X_SITE $CFLAGS"
2280   CPPFLAGS="$C_SWITCH_X_SITE $CPPFLAGS"
2281
2282   # On Solaris, arrange for LD_RUN_PATH to point to the X libraries for tests.
2283   # This is handled by LD_SWITCH_X_SITE_RPATH during the real build,
2284   # but it's more convenient here to set LD_RUN_PATH since this
2285   # also works on hosts that don't understand LD_SWITCH_X_SITE_RPATH.
2286   if test "${x_libraries}" != NONE && test -n "${x_libraries}"; then
2287     LD_RUN_PATH=$x_libraries${LD_RUN_PATH+:}$LD_RUN_PATH
2288     export LD_RUN_PATH
2289   fi
2290
2291   if test "${opsys}" = "gnu-linux"; then
2292     AC_MSG_CHECKING(whether X on GNU/Linux needs -b to link)
2293     AC_LINK_IFELSE([AC_LANG_PROGRAM([[]],
2294      [[XOpenDisplay ("foo");]])],
2295      [xgnu_linux_first_failure=no],
2296      [xgnu_linux_first_failure=yes])
2297     if test "${xgnu_linux_first_failure}" = "yes"; then
2298       OLD_CPPFLAGS="$CPPFLAGS"
2299       OLD_LIBS="$LIBS"
2300       CPPFLAGS="$CPPFLAGS -b i486-linuxaout"
2301       LIBS="$LIBS -b i486-linuxaout"
2302       AC_LINK_IFELSE([AC_LANG_PROGRAM([[]],
2303        [[XOpenDisplay ("foo");]])],
2304        [xgnu_linux_second_failure=no],
2305        [xgnu_linux_second_failure=yes])
2306       if test "${xgnu_linux_second_failure}" = "yes"; then
2307         # If we get the same failure with -b, there is no use adding -b.
2308         # So leave it out.  This plays safe.
2309         AC_MSG_RESULT(no)
2310       else
2311         LD_SWITCH_X_SITE="$LD_SWITCH_X_SITE -b i486-linuxaout"
2312         C_SWITCH_X_SITE="$C_SWITCH_X_SITE -b i486-linuxaout"
2313         AC_MSG_RESULT(yes)
2314       fi
2315       CPPFLAGS=$OLD_CPPFLAGS
2316       LIBS=$OLD_LIBS
2317     else
2318       AC_MSG_RESULT(no)
2319     fi
2320   fi
2321
2322   # Reportedly, some broken Solaris systems have XKBlib.h but are missing
2323   # header files included from there.
2324   AC_MSG_CHECKING(for Xkb)
2325   AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <X11/Xlib.h>
2326 #include <X11/XKBlib.h>]],
2327         [[XkbDescPtr kb = XkbGetKeyboard (0, XkbAllComponentsMask, XkbUseCoreKbd);]])],
2328         emacs_xkb=yes, emacs_xkb=no)
2329   AC_MSG_RESULT($emacs_xkb)
2330   if test $emacs_xkb = yes; then
2331     AC_DEFINE(HAVE_XKB, 1, [Define to 1 if you have the Xkb extension.])
2332   fi
2333
2334   AC_CHECK_FUNCS(XrmSetDatabase XScreenResourceString \
2335 XScreenNumberOfScreen)
2336 fi
2337
2338 if test "${window_system}" = "x11"; then
2339   AC_MSG_CHECKING(X11 version 6)
2340   AC_CACHE_VAL(emacs_cv_x11_version_6,
2341   [AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <X11/Xlib.h>]],
2342 [[#if XlibSpecificationRelease < 6
2343 fail;
2344 #endif
2345 ]])], emacs_cv_x11_version_6=yes, emacs_cv_x11_version_6=no)])
2346   if test $emacs_cv_x11_version_6 = yes; then
2347     AC_MSG_RESULT(6 or newer)
2348     AC_DEFINE(HAVE_X11R6, 1,
2349               [Define to 1 if you have the X11R6 or newer version of Xlib.])
2350     AC_DEFINE(HAVE_X_I18N, 1, [Define if you have usable i18n support.])
2351     ## inoue@ainet.or.jp says Solaris has a bug related to X11R6-style
2352     ## XIM support.
2353     case "$opsys" in
2354       sol2-*) : ;;
2355       *) AC_DEFINE(HAVE_X11R6_XIM, 1,
2356            [Define if you have usable X11R6-style XIM support.])
2357          ;;
2358     esac
2359   else
2360     AC_MSG_RESULT(before 6)
2361   fi
2362 fi
2363
2364
2365 ### Use -lrsvg-2 if available, unless '--with-rsvg=no' is specified.
2366 HAVE_RSVG=no
2367 if test "${HAVE_X11}" = "yes" || test "${HAVE_NS}" = "yes" || test "${opsys}" = "mingw32"; then
2368   if test "${with_rsvg}" != "no"; then
2369     RSVG_REQUIRED=2.11.0
2370     RSVG_MODULE="librsvg-2.0 >= $RSVG_REQUIRED"
2371
2372     EMACS_CHECK_MODULES([RSVG], [$RSVG_MODULE])
2373     AC_SUBST(RSVG_CFLAGS)
2374     AC_SUBST(RSVG_LIBS)
2375
2376     if test $HAVE_RSVG = yes; then
2377       AC_DEFINE(HAVE_RSVG, 1, [Define to 1 if using librsvg.])
2378       CFLAGS="$CFLAGS $RSVG_CFLAGS"
2379       # Windows loads librsvg dynamically
2380       if test "${opsys}" = "mingw32"; then
2381         RSVG_LIBS=
2382       fi
2383     fi
2384   fi
2385 fi
2386
2387 HAVE_IMAGEMAGICK=no
2388 if test "${HAVE_X11}" = "yes" || test "${HAVE_NS}" = "yes" || test "${HAVE_W32}" = "yes"; then
2389   if test "${with_imagemagick}" != "no"; then
2390     ## 6.3.5 is the earliest version known to work; see Bug#17339.
2391     ## 6.8.2 makes Emacs crash; see Bug#13867.
2392     IMAGEMAGICK_MODULE="Wand >= 6.3.5 Wand != 6.8.2"
2393     EMACS_CHECK_MODULES([IMAGEMAGICK], [$IMAGEMAGICK_MODULE])
2394     AC_SUBST(IMAGEMAGICK_CFLAGS)
2395     AC_SUBST(IMAGEMAGICK_LIBS)
2396
2397     if test $HAVE_IMAGEMAGICK = yes; then
2398       AC_DEFINE(HAVE_IMAGEMAGICK, 1, [Define to 1 if using imagemagick.])
2399       OLD_CFLAGS=$CFLAGS
2400       OLD_LIBS=$LIBS
2401       CFLAGS="$CFLAGS $IMAGEMAGICK_CFLAGS"
2402       LIBS="$IMAGEMAGICK_LIBS $LIBS"
2403       AC_CHECK_FUNCS(MagickExportImagePixels MagickMergeImageLayers)
2404       CFLAGS=$OLD_CFLAGS
2405       LIBS=$OLD_LIBS
2406     fi
2407   fi
2408 fi
2409
2410
2411 HAVE_GTK=no
2412 GTK_OBJ=
2413 gtk_term_header=$term_header
2414 check_gtk2=no
2415 gtk3_pkg_errors=
2416 if test "${opsys}" != "mingw32"; then
2417   if test "${with_gtk3}" = "yes" || test "${with_gtk}" = "yes" || test "$USE_X_TOOLKIT" = "maybe"; then
2418     GLIB_REQUIRED=2.28
2419     GTK_REQUIRED=3.0
2420     GTK_MODULES="gtk+-3.0 >= $GTK_REQUIRED glib-2.0 >= $GLIB_REQUIRED"
2421
2422     dnl Checks for libraries.
2423     EMACS_CHECK_MODULES([GTK], [$GTK_MODULES],
2424       [pkg_check_gtk=yes], [pkg_check_gtk=no])
2425     if test "$pkg_check_gtk" = "no" && test "$with_gtk3" = "yes"; then
2426        AC_MSG_ERROR($GTK_PKG_ERRORS)
2427     fi
2428     if test "$pkg_check_gtk" = "yes"; then
2429        AC_DEFINE(HAVE_GTK3, 1, [Define to 1 if using GTK 3 or later.])
2430        GTK_OBJ=emacsgtkfixed.o
2431        gtk_term_header=gtkutil.h
2432        USE_GTK_TOOLKIT="GTK3"
2433        if test "x$ac_enable_gtk_deprecation_warnings" = x; then
2434          AC_DEFINE([GDK_DISABLE_DEPRECATION_WARNINGS], [1],
2435            [Define to 1 to disable GTK+/GDK deprecation warnings.])
2436          AC_DEFINE([GLIB_DISABLE_DEPRECATION_WARNINGS], [1],
2437            [Define to 1 to disable Glib deprecation warnings.])
2438        fi
2439     else
2440        check_gtk2=yes
2441        gtk3_pkg_errors="$GTK_PKG_ERRORS "
2442     fi
2443   fi
2444
2445   if test "${with_gtk2}" = "yes" || test "$check_gtk2" = "yes"; then
2446     GLIB_REQUIRED=2.10
2447     GTK_REQUIRED=2.10
2448     GTK_MODULES="gtk+-2.0 >= $GTK_REQUIRED glib-2.0 >= $GLIB_REQUIRED"
2449
2450     dnl Checks for libraries.
2451     EMACS_CHECK_MODULES([GTK], [$GTK_MODULES],
2452       [pkg_check_gtk=yes], [pkg_check_gtk=no])
2453     if test "$pkg_check_gtk" = "no" &&
2454        { test "$with_gtk" = yes || test "$with_gtk2" = "yes"; }
2455     then
2456       AC_MSG_ERROR($gtk3_pkg_errors$GTK_PKG_ERRORS)
2457     fi
2458     test "$pkg_check_gtk" = "yes" && USE_GTK_TOOLKIT="GTK2"
2459   fi
2460 fi
2461
2462 OLD_CFLAGS=$CFLAGS
2463 OLD_LIBS=$LIBS
2464
2465 if test x"$pkg_check_gtk" = xyes; then
2466
2467   AC_SUBST(GTK_LIBS)
2468   CFLAGS="$CFLAGS $GTK_CFLAGS"
2469   LIBS="$GTK_LIBS $LIBS"
2470   dnl Try to compile a simple GTK program.
2471   AC_MSG_CHECKING([whether GTK compiles])
2472   GTK_COMPILES=no
2473   AC_LINK_IFELSE(
2474     [AC_LANG_PROGRAM(
2475        [[/* Check the Gtk and Glib APIs.  */
2476          #include <gtk/gtk.h>
2477          #include <glib-object.h>
2478          static void
2479          callback (GObject *go, GParamSpec *spec, gpointer user_data)
2480          {}
2481        ]],
2482        [[
2483          GtkSettings *gs = 0;
2484          /* Use G_CALLBACK to make sure function pointers can be cast to void *;
2485             strict C prohibits this.  Use gtk_main_iteration to test that the
2486             libraries are there.  */
2487          if (g_signal_handler_find (G_OBJECT (gs), G_SIGNAL_MATCH_FUNC,
2488                                     0, 0, 0, G_CALLBACK (callback), 0))
2489            gtk_main_iteration ();
2490        ]])],
2491     [GTK_COMPILES=yes])
2492   AC_MSG_RESULT([$GTK_COMPILES])
2493   if test "${GTK_COMPILES}" != "yes"; then
2494     GTK_OBJ=
2495     if test "$USE_X_TOOLKIT" != "maybe"; then
2496       AC_MSG_ERROR([Gtk+ wanted, but it does not compile, see config.log.  Maybe some x11-devel files missing?]);
2497     fi
2498   else
2499     C_SWITCH_X_SITE="$C_SWITCH_X_SITE $GTK_CFLAGS"
2500     HAVE_GTK=yes
2501     AC_DEFINE(USE_GTK, 1, [Define to 1 if using GTK.])
2502     GTK_OBJ="gtkutil.o $GTK_OBJ"
2503     term_header=$gtk_term_header
2504     USE_X_TOOLKIT=none
2505     AC_MSG_WARN([[Your version of Gtk+ will have problems with
2506        closing open displays.  This is no problem if you just use
2507        one display, but if you use more than one and close one of them
2508        Emacs may crash.
2509        See http://bugzilla.gnome.org/show_bug.cgi?id=85715]])
2510     sleep 3
2511   fi
2512
2513 fi
2514 AC_SUBST(GTK_OBJ)
2515
2516
2517 if test "${HAVE_GTK}" = "yes"; then
2518
2519   dnl  GTK scrollbars resemble toolkit scrollbars a lot, so to avoid
2520   dnl  a lot if #ifdef:s, say we have toolkit scrollbars.
2521   if test "$with_toolkit_scroll_bars" != no; then
2522     with_toolkit_scroll_bars=yes
2523   fi
2524
2525   dnl  Check if we have the old file selection dialog declared and
2526   dnl  in the link library.  In 2.x it may be in the library,
2527   dnl  but not declared if deprecated featured has been selected out.
2528   dnl  AC_CHECK_DECL checks for a macro, so check for GTK_TYPE_FILE_SELECTION.
2529   HAVE_GTK_FILE_SELECTION=no
2530   AC_CHECK_DECL(GTK_TYPE_FILE_SELECTION, HAVE_GTK_FILE_SELECTION=yes,
2531                    HAVE_GTK_FILE_SELECTION=no, [AC_INCLUDES_DEFAULT
2532 #include <gtk/gtk.h>])
2533   if test "$HAVE_GTK_FILE_SELECTION" = yes; then
2534     AC_CHECK_FUNCS(gtk_file_selection_new)
2535   fi
2536
2537   dnl Same as above for gtk_handle_box.
2538   HAVE_GTK_HANDLE_BOX=no
2539   AC_CHECK_DECL(GTK_TYPE_HANDLE_BOX, HAVE_GTK_HANDLE_BOX=yes,
2540                    HAVE_GTK_HANDLE_BOX=no, [AC_INCLUDES_DEFAULT
2541 #include <gtk/gtk.h>])
2542   if test "$HAVE_GTK_HANDLE_BOX" = yes; then
2543     AC_CHECK_FUNCS(gtk_handle_box_new)
2544   fi
2545
2546   dnl Same as above for gtk_tearoff_menu_item.
2547   HAVE_GTK_TEAROFF_MENU_ITEM=no
2548   AC_CHECK_DECL(GTK_TYPE_TEAROFF_MENU_ITEM, HAVE_GTK_TEAROFF_MENU_ITEM=yes,
2549                    HAVE_GTK_TEAROFF_MENU_ITEM=no, [AC_INCLUDES_DEFAULT
2550 #include <gtk/gtk.h>])
2551   if test "$HAVE_GTK_TEAROFF_MENU_ITEM" = yes; then
2552     AC_CHECK_FUNCS(gtk_tearoff_menu_item_new)
2553   fi
2554
2555   dnl Check for functions introduced in 2.14 and later.
2556   AC_CHECK_FUNCS(gtk_widget_get_window gtk_widget_set_has_window \
2557                  gtk_dialog_get_action_area gtk_widget_get_sensitive \
2558                  gtk_widget_get_mapped gtk_adjustment_get_page_size \
2559                  gtk_orientable_set_orientation \
2560                  gtk_window_set_has_resize_grip)
2561
2562  term_header=gtkutil.h
2563 fi
2564
2565 CFLAGS=$OLD_CFLAGS
2566 LIBS=$OLD_LIBS
2567
2568 dnl D-Bus has been tested under GNU/Linux only.  Must be adapted for
2569 dnl other platforms.
2570 HAVE_DBUS=no
2571 DBUS_OBJ=
2572 if test "${with_dbus}" = "yes"; then
2573    EMACS_CHECK_MODULES([DBUS], [dbus-1 >= 1.0])
2574    if test "$HAVE_DBUS" = yes; then
2575      AC_DEFINE(HAVE_DBUS, 1, [Define to 1 if using D-Bus.])
2576      dnl dbus_watch_get_unix_fd has been introduced in D-Bus 1.1.1.
2577      dnl dbus_type_is_valid and dbus_validate_* have been introduced in
2578      dnl D-Bus 1.5.12.
2579      OLD_LIBS=$LIBS
2580      LIBS="$LIBS $DBUS_LIBS"
2581      AC_CHECK_FUNCS(dbus_watch_get_unix_fd \
2582                     dbus_type_is_valid \
2583                     dbus_validate_bus_name \
2584                     dbus_validate_path \
2585                     dbus_validate_interface \
2586                     dbus_validate_member)
2587      LIBS=$OLD_LIBS
2588      DBUS_OBJ=dbusbind.o
2589    fi
2590 fi
2591 AC_SUBST(DBUS_CFLAGS)
2592 AC_SUBST(DBUS_LIBS)
2593 AC_SUBST(DBUS_OBJ)
2594
2595 dnl GSettings has been tested under GNU/Linux only.
2596 HAVE_GSETTINGS=no
2597 if test "${HAVE_X11}" = "yes" && test "${with_gsettings}" = "yes"; then
2598    EMACS_CHECK_MODULES([GSETTINGS], [gio-2.0 >= 2.26])
2599    if test "$HAVE_GSETTINGS" = "yes"; then
2600       old_CFLAGS=$CFLAGS
2601       CFLAGS="$CFLAGS $GSETTINGS_CFLAGS"
2602       old_LIBS=$LIBS
2603       LIBS="$LIBS $GSETTINGS_LIBS"
2604       AC_MSG_CHECKING([whether GSettings is in gio])
2605       AC_LINK_IFELSE(
2606          [AC_LANG_PROGRAM(
2607              [[/* Check that gsettings really is present.  */
2608              #include <glib-object.h>
2609              #include <gio/gio.h>
2610              ]],
2611              [[
2612                GSettings *settings;
2613                GVariant *val = g_settings_get_value (settings, "");
2614              ]])],
2615          [], HAVE_GSETTINGS=no)
2616       AC_MSG_RESULT([$HAVE_GSETTINGS])
2617
2618       if test "$HAVE_GSETTINGS" = "yes"; then
2619         AC_DEFINE(HAVE_GSETTINGS, 1, [Define to 1 if using GSettings.])
2620         SETTINGS_CFLAGS="$GSETTINGS_CFLAGS"
2621         SETTINGS_LIBS="$GSETTINGS_LIBS"
2622       fi
2623       CFLAGS=$old_CFLAGS
2624       LIBS=$old_LIBS
2625    fi
2626 fi
2627
2628 dnl GConf has been tested under GNU/Linux only.
2629 dnl The version is really arbitrary, it is about the same age as Gtk+ 2.6.
2630 HAVE_GCONF=no
2631 if test "${HAVE_X11}" = "yes" && test "${with_gconf}" = "yes"; then
2632    EMACS_CHECK_MODULES([GCONF], [gconf-2.0 >= 2.13])
2633    if test "$HAVE_GCONF" = yes; then
2634       AC_DEFINE(HAVE_GCONF, 1, [Define to 1 if using GConf.])
2635       dnl Newer GConf doesn't link with g_objects, so this is not defined.
2636       SETTINGS_CFLAGS="$SETTINGS_CFLAGS $GCONF_CFLAGS"
2637       SETTINGS_LIBS="$SETTINGS_LIBS $GCONF_LIBS"
2638    fi
2639 fi
2640
2641 if test "$HAVE_GSETTINGS" = "yes" || test "$HAVE_GCONF" = "yes"; then
2642     EMACS_CHECK_MODULES([GOBJECT], [gobject-2.0 >= 2.0])
2643     if test "$HAVE_GOBJECT" = "yes"; then
2644        SETTINGS_CFLAGS="$SETTINGS_CFLAGS $GOBJECT_CFLAGS"
2645        SETTINGS_LIBS="$SETTINGS_LIBS $GOBJECT_LIBS"
2646     fi
2647     SAVE_CFLAGS="$CFLAGS"
2648     SAVE_LIBS="$LIBS"
2649     CFLAGS="$SETTINGS_CFLAGS $CFLAGS"
2650     LIBS="$SETTINGS_LIBS $LIBS"
2651     CFLAGS="$SAVE_CFLAGS"
2652     LIBS="$SAVE_LIBS"
2653 fi
2654 AC_SUBST(SETTINGS_CFLAGS)
2655 AC_SUBST(SETTINGS_LIBS)
2656
2657
2658 dnl SELinux is available for GNU/Linux only.
2659 HAVE_LIBSELINUX=no
2660 LIBSELINUX_LIBS=
2661 if test "${with_selinux}" = "yes"; then
2662    AC_CHECK_LIB([selinux], [lgetfilecon], HAVE_LIBSELINUX=yes, HAVE_LIBSELINUX=no)
2663    if test "$HAVE_LIBSELINUX" = yes; then
2664       AC_DEFINE(HAVE_LIBSELINUX, 1, [Define to 1 if using SELinux.])
2665       LIBSELINUX_LIBS=-lselinux
2666    fi
2667 fi
2668 AC_SUBST(LIBSELINUX_LIBS)
2669
2670 HAVE_GNUTLS=no
2671 if test "${with_gnutls}" = "yes" ; then
2672   EMACS_CHECK_MODULES([LIBGNUTLS], [gnutls >= 2.6.6],
2673     [HAVE_GNUTLS=yes], [HAVE_GNUTLS=no])
2674   if test "${HAVE_GNUTLS}" = "yes"; then
2675     AC_DEFINE(HAVE_GNUTLS, 1, [Define if using GnuTLS.])
2676     EMACS_CHECK_MODULES([LIBGNUTLS3], [gnutls >= 3.0.0],
2677       [AC_DEFINE(HAVE_GNUTLS3, 1, [Define if using GnuTLS v3.])], [])
2678   fi
2679
2680   # Windows loads GnuTLS dynamically
2681   if test "${opsys}" = "mingw32"; then
2682     LIBGNUTLS_LIBS=
2683   fi
2684 fi
2685
2686 AC_SUBST(LIBGNUTLS_LIBS)
2687 AC_SUBST(LIBGNUTLS_CFLAGS)
2688
2689 NOTIFY_OBJ=
2690 NOTIFY_SUMMARY=no
2691
2692 dnl FIXME?  Don't auto-detect on NS, but do allow someone to specify
2693 dnl a particular library.  This doesn't make much sense?
2694 if test "${HAVE_NS}" = yes && test ${with_file_notification} = yes; then
2695   with_file_notification=no
2696 fi
2697
2698 dnl MS Windows native file monitor is available for mingw32 only.
2699 case $with_file_notification,$opsys in
2700   w32,cygwin)
2701     AC_MSG_ERROR(['--with-file-notification=w32' was specified, but
2702     this is only supported on MS-Windows native and MinGW32 builds.
2703     Consider using gfile instead.])
2704     ;;
2705   w32,* | yes,mingw32)
2706     AC_CHECK_HEADER(windows.h)
2707     if test "$ac_cv_header_windows_h" = yes ; then
2708        AC_DEFINE(HAVE_W32NOTIFY, 1, [Define to 1 to use w32notify.])
2709        NOTIFY_OBJ=w32notify.o
2710        NOTIFY_SUMMARY="yes (w32)"
2711     fi ;;
2712 esac
2713
2714 dnl inotify is available only on GNU/Linux.
2715 case $with_file_notification,$NOTIFY_OBJ in
2716   inotify, | yes,)
2717     AC_CHECK_HEADER(sys/inotify.h)
2718     if test "$ac_cv_header_sys_inotify_h" = yes ; then
2719         AC_CHECK_FUNC(inotify_init1)
2720         if test "$ac_cv_func_inotify_init1" = yes; then
2721           AC_DEFINE(HAVE_INOTIFY, 1, [Define to 1 to use inotify.])
2722           NOTIFY_OBJ=inotify.o
2723           NOTIFY_SUMMARY="yes -lglibc (inotify)"
2724        fi
2725     fi ;;
2726 esac
2727
2728 dnl g_file_monitor exists since glib 2.18.  G_FILE_MONITOR_EVENT_MOVED
2729 dnl has been added in glib 2.24.  It has been tested under
2730 dnl GNU/Linux only.
2731 case $with_file_notification,$NOTIFY_OBJ in
2732   gfile,* | yes,)
2733     EMACS_CHECK_MODULES([GFILENOTIFY], [gio-2.0 >= 2.24])
2734     if test "$HAVE_GFILENOTIFY" = "yes"; then
2735        AC_DEFINE(HAVE_GFILENOTIFY, 1, [Define to 1 if using GFile.])
2736        NOTIFY_OBJ=gfilenotify.o
2737        NOTIFY_SUMMARY="yes -lgio (gfile)"
2738     fi ;;
2739 esac
2740
2741 case $with_file_notification,$NOTIFY_OBJ in
2742   yes,* | no,* | *,?*) ;;
2743   *) AC_MSG_ERROR([File notification '$with_file_notification' requested but requirements not found.]) ;;
2744 esac
2745
2746 if test -n "$NOTIFY_OBJ"; then
2747    AC_DEFINE(USE_FILE_NOTIFY, 1, [Define to 1 if using file notifications.])
2748 fi
2749 AC_SUBST(NOTIFY_OBJ)
2750 AC_SUBST(GFILENOTIFY_CFLAGS)
2751 AC_SUBST(GFILENOTIFY_LIBS)
2752
2753 dnl Do not put whitespace before the #include statements below.
2754 dnl Older compilers (eg sunos4 cc) choke on it.
2755 HAVE_XAW3D=no
2756 LUCID_LIBW=
2757 if test x"${USE_X_TOOLKIT}" = xmaybe || test x"${USE_X_TOOLKIT}" = xLUCID; then
2758   if test "$with_xaw3d" != no; then
2759     AC_CACHE_VAL(emacs_cv_xaw3d,
2760     [AC_LINK_IFELSE([AC_LANG_PROGRAM([[
2761 #include <X11/Intrinsic.h>
2762 #include <X11/Xaw3d/Simple.h>]],
2763       [[]])],
2764       [AC_CHECK_LIB(Xaw3d, XawScrollbarSetThumb,
2765                     emacs_cv_xaw3d=yes, emacs_cv_xaw3d=no)],
2766       emacs_cv_xaw3d=no)])
2767   else
2768     emacs_cv_xaw3d=no
2769   fi
2770   if test $emacs_cv_xaw3d = yes; then
2771     AC_MSG_CHECKING(for xaw3d)
2772     AC_MSG_RESULT([yes; using Lucid toolkit])
2773     USE_X_TOOLKIT=LUCID
2774     HAVE_XAW3D=yes
2775     LUCID_LIBW=-lXaw3d
2776     AC_DEFINE(HAVE_XAW3D, 1,
2777               [Define to 1 if you have the Xaw3d library (-lXaw3d).])
2778   else
2779     AC_MSG_CHECKING(for xaw3d)
2780     AC_MSG_RESULT(no)
2781     AC_MSG_CHECKING(for libXaw)
2782     AC_CACHE_VAL(emacs_cv_xaw,
2783     [AC_LINK_IFELSE([AC_LANG_PROGRAM([[
2784 #include <X11/Intrinsic.h>
2785 #include <X11/Xaw/Simple.h>]],
2786       [[]])],
2787       emacs_cv_xaw=yes,
2788       emacs_cv_xaw=no)])
2789     if test $emacs_cv_xaw = yes; then
2790       AC_MSG_RESULT([yes; using Lucid toolkit])
2791       USE_X_TOOLKIT=LUCID
2792       LUCID_LIBW=-lXaw
2793     elif test x"${USE_X_TOOLKIT}" = xLUCID; then
2794       AC_MSG_ERROR([Lucid toolkit requires X11/Xaw include files])
2795     else
2796       AC_MSG_ERROR([No X toolkit could be found.
2797 If you are sure you want Emacs compiled without an X toolkit, pass
2798   --with-x-toolkit=no
2799 to configure.  Otherwise, install the development libraries for the toolkit
2800 that you want to use (e.g. Gtk+) and re-run configure.])
2801     fi
2802   fi
2803 fi
2804
2805 X_TOOLKIT_TYPE=$USE_X_TOOLKIT
2806
2807 LIBXTR6=
2808 LIBXMU=
2809 if test "${USE_X_TOOLKIT}" != "none"; then
2810   AC_MSG_CHECKING(X11 toolkit version)
2811   AC_CACHE_VAL(emacs_cv_x11_toolkit_version_6,
2812   [AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <X11/Intrinsic.h>]],
2813 [[#if XtSpecificationRelease < 6
2814 fail;
2815 #endif
2816 ]])], emacs_cv_x11_toolkit_version_6=yes, emacs_cv_x11_toolkit_version_6=no)])
2817   HAVE_X11XTR6=$emacs_cv_x11_toolkit_version_6
2818   if test $emacs_cv_x11_toolkit_version_6 = yes; then
2819     AC_MSG_RESULT(6 or newer)
2820     AC_DEFINE(HAVE_X11XTR6, 1,
2821               [Define to 1 if you have the X11R6 or newer version of Xt.])
2822     LIBXTR6="-lSM -lICE"
2823     case "$opsys" in
2824       ## Use libw.a along with X11R6 Xt.
2825       unixware) LIBXTR6="$LIBXTR6 -lw" ;;
2826     esac
2827   else
2828     AC_MSG_RESULT(before 6)
2829   fi
2830
2831 dnl If using toolkit, check whether libXmu.a exists.
2832 dnl tranle@intellicorp.com says libXmu.a can need XtMalloc in libXt.a to link.
2833   OLDLIBS="$LIBS"
2834   if test x$HAVE_X11XTR6 = xyes; then
2835     OTHERLIBS='-lXt -lSM -lICE'
2836   else
2837     OTHERLIBS='-lXt'
2838   fi
2839   AC_SEARCH_LIBS([XmuConvertStandardSelection], [Xmu], [], [], [$OTHERLIBS])
2840   if test "X$LIBS" != "X$OLDLIBS"; then
2841     LIBXMU=$ac_cv_search_XmuConvertStandardSelection
2842   fi
2843   LIBS=$OLDLIBS
2844   dnl ac_cv_search_XmuConvertStandardSelection is also referenced below.
2845 fi
2846 AC_SUBST(LIBXTR6)
2847 AC_SUBST(LIBXMU)
2848
2849 LIBXP=
2850 if test "${USE_X_TOOLKIT}" = "MOTIF"; then
2851   # OpenMotif may be installed in such a way on some GNU/Linux systems.
2852   if test -d /usr/include/openmotif; then
2853     CPPFLAGS="-I/usr/include/openmotif $CPPFLAGS"
2854     emacs_cv_openmotif=yes
2855     case "$canonical" in
2856       x86_64-*-linux-gnu* | powerpc64-*-linux-gnu* | sparc64-*-linux-gnu*)
2857       test -d /usr/lib64/openmotif && LDFLAGS="-L/usr/lib64/openmotif $LDFLAGS"
2858       ;;
2859       *)
2860       test -d /usr/lib/openmotif && LDFLAGS="-L/usr/lib/openmotif $LDFLAGS"
2861     esac
2862   else
2863     emacs_cv_openmotif=no
2864   fi
2865   AC_CACHE_CHECK(for (Open)Motif version 2.1, emacs_cv_motif_version_2_1,
2866   [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <Xm/Xm.h>]],
2867     [[#if XmVERSION > 2 || (XmVERSION == 2 && XmREVISION >= 1)
2868 int x = 5;
2869 #else
2870 Motif version prior to 2.1.
2871 #endif]])],
2872     emacs_cv_motif_version_2_1=yes, emacs_cv_motif_version_2_1=no)])
2873   if test $emacs_cv_motif_version_2_1 = yes; then
2874     AC_CHECK_LIB(Xp, XpCreateContext, LIBXP=-lXp)
2875     if test x$emacs_cv_openmotif = xyes; then
2876       REAL_CPPFLAGS="-I/usr/include/openmotif $REAL_CPPFLAGS"
2877     fi
2878   else
2879     AC_CACHE_CHECK(for LessTif where some systems put it, emacs_cv_lesstif,
2880     # We put this in CFLAGS temporarily to precede other -I options
2881     # that might be in CFLAGS temporarily.
2882     # We put this in CPPFLAGS where it precedes the other -I options.
2883     OLD_CPPFLAGS=$CPPFLAGS
2884     OLD_CFLAGS=$CFLAGS
2885     CPPFLAGS="-I/usr/X11R6/LessTif/Motif1.2/include $CPPFLAGS"
2886     CFLAGS="-I/usr/X11R6/LessTif/Motif1.2/include $CFLAGS"
2887     [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include </usr/X11R6/LessTif/Motif1.2/include/Xm/Xm.h>]],
2888       [[int x = 5;]])],
2889       emacs_cv_lesstif=yes, emacs_cv_lesstif=no)])
2890     if test $emacs_cv_lesstif = yes; then
2891       # Make sure this -I option remains in CPPFLAGS after it is set
2892       # back to REAL_CPPFLAGS.
2893       # There is no need to change REAL_CFLAGS, because REAL_CFLAGS does not
2894       # have those other -I options anyway.  Ultimately, having this
2895       # directory ultimately in CPPFLAGS will be enough.
2896       REAL_CPPFLAGS="-I/usr/X11R6/LessTif/Motif1.2/include $REAL_CPPFLAGS"
2897       LDFLAGS="-L/usr/X11R6/LessTif/Motif1.2/lib $LDFLAGS"
2898     else
2899       CFLAGS=$OLD_CFLAGS
2900       CPPFLAGS=$OLD_CPPFLAGS
2901     fi
2902   fi
2903   AC_CHECK_HEADER([Xm/BulletinB.h], [],
2904     [AC_MSG_ERROR([Motif toolkit requested but requirements not found.])])
2905 fi
2906
2907 dnl Use toolkit scroll bars if configured for GTK or X toolkit and either
2908 dnl using Motif or Xaw3d is available, and unless
2909 dnl --with-toolkit-scroll-bars=no was specified.
2910
2911 AH_TEMPLATE(USE_TOOLKIT_SCROLL_BARS,
2912             [Define to 1 if we should use toolkit scroll bars.])dnl
2913 USE_TOOLKIT_SCROLL_BARS=no
2914 if test "${with_toolkit_scroll_bars}" != "no"; then
2915   if test "${USE_X_TOOLKIT}" != "none"; then
2916     if test "${USE_X_TOOLKIT}" = "MOTIF"; then
2917       AC_DEFINE(USE_TOOLKIT_SCROLL_BARS)
2918       HAVE_XAW3D=no
2919       USE_TOOLKIT_SCROLL_BARS=yes
2920     elif test "${HAVE_XAW3D}" = "yes" || test "${USE_X_TOOLKIT}" = "LUCID"; then
2921       AC_DEFINE(USE_TOOLKIT_SCROLL_BARS)
2922       USE_TOOLKIT_SCROLL_BARS=yes
2923     fi
2924   elif test "${HAVE_GTK}" = "yes"; then
2925     AC_DEFINE(USE_TOOLKIT_SCROLL_BARS)
2926     USE_TOOLKIT_SCROLL_BARS=yes
2927   elif test "${HAVE_NS}" = "yes"; then
2928     AC_DEFINE(USE_TOOLKIT_SCROLL_BARS)
2929     USE_TOOLKIT_SCROLL_BARS=yes
2930   elif test "${HAVE_W32}" = "yes"; then
2931     AC_DEFINE(USE_TOOLKIT_SCROLL_BARS)
2932     USE_TOOLKIT_SCROLL_BARS=yes
2933   fi
2934 fi
2935
2936 dnl See if XIM is available.
2937 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
2938           #include <X11/Xlib.h>
2939           #include <X11/Xresource.h>]],
2940          [[XIMProc  callback;]])],
2941          [HAVE_XIM=yes
2942          AC_DEFINE(HAVE_XIM, 1, [Define to 1 if XIM is available])],
2943          HAVE_XIM=no)
2944
2945 dnl '--with-xim' now controls only the initial value of use_xim at run time.
2946
2947 if test "${with_xim}" != "no"; then
2948   AC_DEFINE(USE_XIM, 1,
2949             [Define to 1 if we should use XIM, if it is available.])
2950 fi
2951
2952
2953 if test "${HAVE_XIM}" != "no"; then
2954   late_CFLAGS=$CFLAGS
2955   if test "$GCC" = yes; then
2956     CFLAGS="$CFLAGS --pedantic-errors"
2957   fi
2958   AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
2959 #include <X11/Xlib.h>
2960 #include <X11/Xresource.h>]],
2961 [[Display *display;
2962 XrmDatabase db;
2963 char *res_name;
2964 char *res_class;
2965 XIMProc  callback;
2966 XPointer *client_data;
2967 #ifndef __GNUC__
2968 /* If we're not using GCC, it's probably not XFree86, and this is
2969    probably right, but we can't use something like --pedantic-errors.  */
2970 extern Bool XRegisterIMInstantiateCallback(Display*, XrmDatabase, char*,
2971                                            char*, XIMProc, XPointer*);
2972 #endif
2973 (void)XRegisterIMInstantiateCallback(display, db, res_name, res_class, callback,
2974    client_data);]])],
2975     [emacs_cv_arg6_star=yes])
2976   AH_TEMPLATE(XRegisterIMInstantiateCallback_arg6,
2977          [Define to the type of the 6th arg of XRegisterIMInstantiateCallback,
2978 either XPointer or XPointer*.])dnl
2979   if test "$emacs_cv_arg6_star" = yes; then
2980     AC_DEFINE(XRegisterIMInstantiateCallback_arg6, [XPointer*])
2981   else
2982     AC_DEFINE(XRegisterIMInstantiateCallback_arg6, [XPointer])
2983   fi
2984   CFLAGS=$late_CFLAGS
2985 fi
2986
2987 ### Start of font-backend (under any platform) section.
2988 # (nothing here yet -- this is a placeholder)
2989 ### End of font-backend (under any platform) section.
2990
2991 ### Start of font-backend (under X11) section.
2992 if test "${HAVE_X11}" = "yes"; then
2993     ## Use -lXft if available, unless '--with-xft=no'.
2994     HAVE_XFT=maybe
2995     if test "x${with_x}" = "xno"; then
2996       with_xft="no";
2997     fi
2998
2999     if test "$with_xft" != no; then
3000       EMACS_CHECK_MODULES([FONTCONFIG], [fontconfig >= 2.2.0])
3001       with_xft=$HAVE_FONTCONFIG
3002     fi
3003
3004     if test "x${with_xft}" != "xno"; then
3005
3006       EMACS_CHECK_MODULES([XFT], [xft >= 0.13.0], [], [HAVE_XFT=no])
3007       ## Because xftfont.c uses XRenderQueryExtension, we also
3008       ## need to link to -lXrender.
3009       HAVE_XRENDER=no
3010       AC_CHECK_LIB(Xrender, XRenderQueryExtension, HAVE_XRENDER=yes)
3011       if test "$HAVE_XFT" != no && test "$HAVE_XRENDER" != no; then
3012         OLD_CPPFLAGS="$CPPFLAGS"
3013         OLD_CFLAGS="$CFLAGS"
3014         OLD_LIBS="$LIBS"
3015         CPPFLAGS="$CPPFLAGS $XFT_CFLAGS"
3016         CFLAGS="$CFLAGS $XFT_CFLAGS"
3017         XFT_LIBS="-lXrender $XFT_LIBS"
3018         LIBS="$XFT_LIBS $LIBS"
3019         AC_CHECK_HEADER(X11/Xft/Xft.h,
3020           AC_CHECK_LIB(Xft, XftFontOpen, HAVE_XFT=yes, , $XFT_LIBS) , ,
3021           [[#include <X11/X.h>]])
3022
3023         if test "${HAVE_XFT}" = "yes"; then
3024           AC_DEFINE(HAVE_XFT, 1, [Define to 1 if you have the Xft library.])
3025             AC_SUBST(XFT_LIBS)
3026           C_SWITCH_X_SITE="$C_SWITCH_X_SITE $XFT_CFLAGS"
3027         fi                        # "${HAVE_XFT}" = "yes"
3028         CPPFLAGS=$OLD_CPPFLAGS
3029         CFLAGS=$OLD_CFLAGS
3030         LIBS=$OLD_LIBS
3031       fi                          # "$HAVE_XFT" != no
3032     fi                            # "x${with_xft}" != "xno"
3033
3034     ## We used to allow building with FreeType and without Xft.
3035     ## However, the ftx font backend driver is not in good shape.
3036     if test "$HAVE_XFT" != "yes"; then
3037        dnl For the "Does Emacs use" message at the end.
3038        HAVE_XFT=no
3039        HAVE_FREETYPE=no
3040     else
3041        dnl Strict linkers fail with
3042        dnl ftfont.o: undefined reference to symbol 'FT_New_Face'
3043        dnl if -lfreetype is not specified.
3044        dnl The following is needed to set FREETYPE_LIBS.
3045        EMACS_CHECK_MODULES([FREETYPE], [freetype2])
3046
3047        test "$HAVE_FREETYPE" = "no" && AC_MSG_ERROR(libxft requires libfreetype)
3048     fi
3049
3050     HAVE_LIBOTF=no
3051     if test "${HAVE_FREETYPE}" = "yes"; then
3052       AC_DEFINE(HAVE_FREETYPE, 1,
3053                 [Define to 1 if using the freetype and fontconfig libraries.])
3054       if test "${with_libotf}" != "no"; then
3055         EMACS_CHECK_MODULES([LIBOTF], [libotf])
3056         if test "$HAVE_LIBOTF" = "yes"; then
3057           AC_DEFINE(HAVE_LIBOTF, 1, [Define to 1 if using libotf.])
3058           AC_CHECK_LIB(otf, OTF_get_variation_glyphs,
3059                        HAVE_OTF_GET_VARIATION_GLYPHS=yes,
3060                        HAVE_OTF_GET_VARIATION_GLYPHS=no)
3061           if test "${HAVE_OTF_GET_VARIATION_GLYPHS}" = "yes"; then
3062             AC_DEFINE(HAVE_OTF_GET_VARIATION_GLYPHS, 1,
3063                       [Define to 1 if libotf has OTF_get_variation_glyphs.])
3064           fi
3065         fi
3066       fi
3067     dnl FIXME should there be an error if HAVE_FREETYPE != yes?
3068     dnl Does the new font backend require it, or can it work without it?
3069     fi
3070
3071     HAVE_M17N_FLT=no
3072     if test "${HAVE_LIBOTF}" = yes; then
3073       if test "${with_m17n_flt}" != "no"; then
3074         EMACS_CHECK_MODULES([M17N_FLT], [m17n-flt])
3075         if test "$HAVE_M17N_FLT" = "yes"; then
3076           AC_DEFINE(HAVE_M17N_FLT, 1, [Define to 1 if using libm17n-flt.])
3077         fi
3078       fi
3079     fi
3080 else
3081     HAVE_XFT=no
3082     HAVE_FREETYPE=no
3083     HAVE_LIBOTF=no
3084     HAVE_M17N_FLT=no
3085 fi
3086
3087 ### End of font-backend (under X11) section.
3088
3089 AC_SUBST(FREETYPE_CFLAGS)
3090 AC_SUBST(FREETYPE_LIBS)
3091 AC_SUBST(FONTCONFIG_CFLAGS)
3092 AC_SUBST(FONTCONFIG_LIBS)
3093 AC_SUBST(LIBOTF_CFLAGS)
3094 AC_SUBST(LIBOTF_LIBS)
3095 AC_SUBST(M17N_FLT_CFLAGS)
3096 AC_SUBST(M17N_FLT_LIBS)
3097
3098 USE_CAIRO=no
3099 if test "${HAVE_X11}" = "yes"; then
3100   if test "${with_cairo}" != "no"; then
3101     CAIRO_REQUIRED=1.12.0
3102     CAIRO_MODULE="cairo >= $CAIRO_REQUIRED"
3103     PKG_CHECK_MODULES(CAIRO, $CAIRO_MODULE, USE_CAIRO=yes, :)
3104     if test $USE_CAIRO = yes; then
3105       AC_DEFINE(USE_CAIRO, 1, [Define to 1 if using cairo.])
3106     else
3107       AC_MSG_ERROR([cairo requested but not found.])
3108     fi
3109
3110     CFLAGS="$CFLAGS $CAIRO_CFLAGS"
3111     LIBS="$LIBS $CAIRO_LIBS"
3112     AC_SUBST(CAIRO_CFLAGS)
3113     AC_SUBST(CAIRO_LIBS)
3114   fi
3115 fi
3116
3117 if test "${HAVE_X11}" = "yes"; then
3118   AC_CHECK_HEADER(X11/Xlib-xcb.h,
3119     AC_CHECK_LIB(xcb, xcb_translate_coordinates, HAVE_XCB=yes))
3120   if test "${HAVE_XCB}" = "yes"; then
3121     AC_CHECK_LIB(X11-xcb, XGetXCBConnection, HAVE_X11_XCB=yes)
3122     if test "${HAVE_X11_XCB}" = "yes"; then
3123       AC_DEFINE(USE_XCB, 1,
3124 [Define to 1 if you have the XCB library and X11-XCB library for mixed
3125    X11/XCB programming.])
3126       XCB_LIBS="-lX11-xcb -lxcb"
3127       AC_SUBST(XCB_LIBS)
3128     fi
3129   fi
3130 fi
3131
3132 ### Use -lXpm if available, unless '--with-xpm=no'.
3133 ### mingw32 doesn't use -lXpm, since it loads the library dynamically.
3134 ### In the Cygwin-w32 build, we need to use /usr/include/noX/X11/xpm.h
3135 ### rather than /usr/include/X11/xpm.h, so we set CPPFLAGS (and
3136 ### LDFLAGS) accordingly.
3137 HAVE_XPM=no
3138 LIBXPM=
3139 if test "${HAVE_W32}" = "yes" && test "${opsys}" = "cygwin"; then
3140   if test "${with_xpm}" != "no"; then
3141     SAVE_CPPFLAGS="$CPPFLAGS"
3142     SAVE_LDFLAGS="$LDFLAGS"
3143     CPPFLAGS="$CPPFLAGS -I/usr/include/noX"
3144     LDFLAGS="$LDFLAGS -L/usr/lib/noX"
3145     AC_CHECK_HEADER(X11/xpm.h,
3146       [AC_CHECK_LIB(Xpm, XpmReadFileToImage, HAVE_XPM=yes)])
3147     if test "${HAVE_XPM}" = "yes"; then
3148       AC_MSG_CHECKING(for XpmReturnAllocPixels preprocessor define)
3149       AC_EGREP_CPP(no_return_alloc_pixels,
3150       [#include "X11/xpm.h"
3151 #ifndef XpmReturnAllocPixels
3152 no_return_alloc_pixels
3153 #endif
3154       ], HAVE_XPM=no, HAVE_XPM=yes)
3155
3156       if test "${HAVE_XPM}" = "yes"; then
3157         REAL_CPPFLAGS="$REAL_CPPFLAGS -I/usr/include/noX"
3158         AC_MSG_RESULT(yes)
3159       else
3160         AC_MSG_RESULT(no)
3161         CPPFLAGS="$SAVE_CPPFLAGS"
3162         LDFLAGS="$SAVE_LDFLAGS"
3163       fi
3164     fi
3165   fi
3166
3167   if test "${HAVE_XPM}" = "yes"; then
3168     AC_DEFINE(HAVE_XPM, 1, [Define to 1 if you have the Xpm library (-lXpm).])
3169     LIBXPM=-lXpm
3170   fi
3171 fi
3172
3173 if test "${HAVE_X11}" = "yes"; then
3174   dnl Avoid Xpm on AIX unless requested, as it crashes; see Bug#17598.
3175   test "$opsys$with_xpm_set" = aix4-2 && with_xpm=no
3176
3177   if test "${with_xpm}" != "no"; then
3178     AC_CHECK_HEADER(X11/xpm.h,
3179       [AC_CHECK_LIB(Xpm, XpmReadFileToPixmap, HAVE_XPM=yes, , -lX11)])
3180     if test "${HAVE_XPM}" = "yes"; then
3181       AC_MSG_CHECKING(for XpmReturnAllocPixels preprocessor define)
3182       AC_EGREP_CPP(no_return_alloc_pixels,
3183       [#include "X11/xpm.h"
3184 #ifndef XpmReturnAllocPixels
3185 no_return_alloc_pixels
3186 #endif
3187       ], HAVE_XPM=no, HAVE_XPM=yes)
3188
3189       if test "${HAVE_XPM}" = "yes"; then
3190         AC_MSG_RESULT(yes)
3191       else
3192         AC_MSG_RESULT(no)
3193       fi
3194     fi
3195   fi
3196
3197   if test "${HAVE_XPM}" = "yes"; then
3198     AC_DEFINE(HAVE_XPM, 1, [Define to 1 if you have the Xpm library (-lXpm).])
3199     LIBXPM=-lXpm
3200   elif test "$opsys,$LUCID_LIBW" = aix4-2,-lXaw; then
3201     dnl AIX -lXaw needs -lXpm linked too; see Bug#17598 Message#152.
3202     LIBXPM=-lXpm
3203   fi
3204 fi
3205
3206 ### FIXME: Perhaps regroup to minimize code duplication due to MinGW's
3207 ### slightly different requirements wrt image libraries (it doesn't
3208 ### use -lXpm because it loads the xpm shared library dynamically at
3209 ### run time).
3210 if test "${opsys}" = "mingw32"; then
3211   if test "${with_xpm}" != "no"; then
3212     AC_CHECK_HEADER(X11/xpm.h, HAVE_XPM=yes, HAVE_XPM=no, [
3213 #define FOR_MSW 1])
3214   fi
3215
3216   if test "${HAVE_XPM}" = "yes"; then
3217     AC_DEFINE(HAVE_XPM, 1, [Define to 1 if you have the Xpm library (-lXpm).])
3218   fi
3219 fi
3220
3221 AC_SUBST(LIBXPM)
3222
3223 ### Use -ljpeg if available, unless '--with-jpeg=no'.
3224 HAVE_JPEG=no
3225 LIBJPEG=
3226 if test "${with_jpeg}" != "no"; then
3227   AC_CACHE_CHECK([for jpeglib 6b or later],
3228     [emacs_cv_jpeglib],
3229     [OLD_LIBS=$LIBS
3230      for emacs_cv_jpeglib in yes -ljpeg no; do
3231        case $emacs_cv_jpeglib in
3232          yes) ;;
3233          no) break;;
3234          *) LIBS="$LIBS $emacs_cv_jpeglib";;
3235        esac
3236        AC_LINK_IFELSE(
3237          [AC_LANG_PROGRAM(
3238             [[#undef HAVE_STDLIB_H /* Avoid config.h/jpeglib.h collision.  */
3239               #include <stdio.h> /* jpeglib.h needs FILE and size_t.  */
3240               #include <jpeglib.h>
3241               #include <jerror.h>
3242               char verify[JPEG_LIB_VERSION < 62 ? -1 : 1];
3243               struct jpeg_decompress_struct cinfo;
3244             ]],
3245             [[
3246               jpeg_create_decompress (&cinfo);
3247               WARNMS (&cinfo, JWRN_JPEG_EOF);
3248               jpeg_destroy_decompress (&cinfo);
3249             ]])],
3250          [emacs_link_ok=yes],
3251          [emacs_link_ok=no])
3252        LIBS=$OLD_LIBS
3253        test $emacs_link_ok = yes && break
3254      done])
3255   if test "$emacs_cv_jpeglib" != no; then
3256     HAVE_JPEG=yes
3257     AC_DEFINE([HAVE_JPEG], 1,
3258       [Define to 1 if you have the jpeg library (typically -ljpeg).])
3259     ### mingw32 doesn't use -ljpeg, since it loads the library
3260     ### dynamically when needed, and doesn't want a run-time
3261     ### dependency on the jpeglib DLL.
3262     test "$emacs_cv_jpeglib" != yes && test "${opsys}" != "mingw32" \
3263     && LIBJPEG=$emacs_cv_jpeglib
3264   fi
3265 fi
3266 AC_SUBST(LIBJPEG)
3267
3268 HAVE_ZLIB=no
3269 LIBZ=
3270 if test "${with_zlib}" != "no"; then
3271   OLIBS=$LIBS
3272   AC_SEARCH_LIBS([inflateEnd], [z], [HAVE_ZLIB=yes])
3273   LIBS=$OLIBS
3274   case $ac_cv_search_inflateEnd in
3275     -*) LIBZ=$ac_cv_search_inflateEnd ;;
3276   esac
3277 fi
3278 if test "${HAVE_ZLIB}" = "yes"; then
3279   AC_DEFINE([HAVE_ZLIB], 1, [Define to 1 if you have the zlib library (-lz).])
3280   ### mingw32 doesn't use -lz, since it loads the library dynamically.
3281   if test "${opsys}" = "mingw32"; then
3282      LIBZ=
3283   fi
3284 fi
3285 AC_SUBST(LIBZ)
3286
3287 ### Dynamic modules support
3288 LIBMODULES=
3289 HAVE_MODULES=no
3290 MODULES_OBJ=
3291 MODULES_SUFFIX=
3292 if test "${with_modules}" != "no"; then
3293   if test "$opsys" = "gnu-linux"; then
3294     LIBMODULES="-ldl"
3295     MODULES_SUFFIX=".so"
3296     HAVE_MODULES=yes
3297   elif test "$opsys" = "cygwin"; then
3298     MODULES_SUFFIX=".dll"
3299     HAVE_MODULES=yes
3300   elif test "$opsys" = "darwin"; then
3301     MODULES_SUFFIX=".so"
3302     HAVE_MODULES=yes
3303   elif test "$opsys" = "mingw32"; then
3304     MODULES_SUFFIX=".dll"
3305     HAVE_MODULES=yes
3306   else
3307     # BSD system have dlopen in the libc
3308     AC_CHECK_FUNC(dlopen, [MODULES_SUFFIX=".so"]
3309                           [HAVE_MODULES=yes], [])
3310   fi
3311
3312   if test "${HAVE_MODULES}" = no; then
3313     AC_MSG_ERROR([Dynamic modules are not supported on your system])
3314   else
3315     SAVE_LIBS=$LIBS
3316     LIBS="$LIBS $LIBMODULES"
3317     AC_CHECK_FUNCS([dlfunc])
3318     LIBS=$SAVE_LIBS
3319   fi
3320 fi
3321
3322 if test "${HAVE_MODULES}" = yes; then
3323    MODULES_OBJ="dynlib.o emacs-module.o"
3324    AC_DEFINE(HAVE_MODULES, 1, [Define to 1 if dynamic modules are enabled])
3325    AC_DEFINE_UNQUOTED(MODULES_SUFFIX, "$MODULES_SUFFIX",
3326      [System extension for dynamic libraries])
3327 fi
3328 AC_SUBST(MODULES_OBJ)
3329 AC_SUBST(LIBMODULES)
3330 AX_GCC_VAR_ATTRIBUTE(cleanup)
3331 AC_CHECK_FUNCS(dladdr)
3332
3333 ### Use -lpng if available, unless '--with-png=no'.
3334 HAVE_PNG=no
3335 LIBPNG=
3336 PNG_CFLAGS=
3337 if test "${NS_IMPL_COCOA}" = yes; then
3338   : # Nothing to do
3339 elif test "${with_png}" != no; then
3340   # mingw32 loads the library dynamically.
3341   if test "$opsys" = mingw32; then
3342     AC_CHECK_HEADER([png.h], [HAVE_PNG=yes])
3343   elif test "${HAVE_X11}" = "yes" || test "${HAVE_W32}" = "yes"; then
3344     AC_MSG_CHECKING([for png])
3345     png_cflags=`(libpng-config --cflags) 2>&AS_MESSAGE_LOG_FD` &&
3346     png_libs=`(libpng-config --libs) 2>&AS_MESSAGE_LOG_FD` || {
3347       # libpng-config does not work; configure by hand.
3348       # Debian unstable as of July 2003 has multiple libpngs, and puts png.h
3349       # in /usr/include/libpng.
3350       if test -r /usr/include/libpng/png.h &&
3351          test ! -r /usr/include/png.h; then
3352         png_cflags=-I/usr/include/libpng
3353       else
3354         png_cflags=
3355       fi
3356       png_libs='-lpng'
3357     }
3358     SAVE_CFLAGS=$CFLAGS
3359     SAVE_LIBS=$LIBS
3360     CFLAGS="$CFLAGS $png_cflags"
3361     LIBS="$png_libs -lz -lm $LIBS"
3362     AC_LINK_IFELSE(
3363       [AC_LANG_PROGRAM([[#include <png.h>]],
3364          [[return !png_get_channels (0, 0);]])],
3365       [HAVE_PNG=yes
3366        PNG_CFLAGS=`AS_ECHO(["$png_cflags"]) | sed -e "$edit_cflags"`
3367        LIBPNG=$png_libs
3368        # $LIBPNG requires explicit -lz in some cases.
3369        # We don't know what those cases are, exactly, so play it safe and
3370        # append -lz to any nonempty $LIBPNG, unless we're already using LIBZ.
3371        if test -n "$LIBPNG" && test -z "$LIBZ"; then
3372          LIBPNG="$LIBPNG -lz"
3373        fi])
3374     CFLAGS=$SAVE_CFLAGS
3375     LIBS=$SAVE_LIBS
3376     AC_MSG_RESULT([$HAVE_PNG])
3377   fi
3378 fi
3379 if test $HAVE_PNG = yes; then
3380   AC_DEFINE([HAVE_PNG], [1], [Define to 1 if you have the png library.])
3381
3382   SAVE_CFLAGS=$CFLAGS
3383   CFLAGS="$CFLAGS $PNG_CFLAGS"
3384   AC_CHECK_DECL([png_longjmp],
3385     [],
3386     [AC_DEFINE([PNG_DEPSTRUCT], [],
3387        [Define to empty to suppress deprecation warnings when building
3388         with --enable-gcc-warnings and with libpng versions before 1.5,
3389         which lack png_longjmp.])],
3390     [[#include <png.h>
3391     ]])
3392   CFLAGS=$SAVE_CFLAGS
3393 fi
3394 AC_SUBST(LIBPNG)
3395 AC_SUBST(PNG_CFLAGS)
3396
3397 ### Use -ltiff if available, unless '--with-tiff=no'.
3398 ### mingw32 doesn't use -ltiff, since it loads the library dynamically.
3399 HAVE_TIFF=no
3400 LIBTIFF=
3401 if test "${opsys}" = "mingw32"; then
3402   if test "${with_tiff}" != "no"; then
3403     AC_CHECK_HEADER(tiffio.h, HAVE_TIFF=yes, HAVE_TIFF=no)
3404   fi
3405   if test "${HAVE_TIFF}" = "yes"; then
3406     AC_DEFINE(HAVE_TIFF, 1, [Define to 1 if you have the tiff library (-ltiff).])
3407   fi
3408 elif test "${HAVE_X11}" = "yes" || test "${HAVE_W32}" = "yes"; then
3409   if test "${with_tiff}" != "no"; then
3410     AC_CHECK_HEADER(tiffio.h,
3411       [tifflibs="-lz -lm"
3412       # At least one tiff package requires the jpeg library.
3413       if test "${HAVE_JPEG}" = yes; then tifflibs="-ljpeg $tifflibs"; fi
3414       AC_CHECK_LIB(tiff, TIFFGetVersion, HAVE_TIFF=yes, , $tifflibs)])
3415   fi
3416
3417   if test "${HAVE_TIFF}" = "yes"; then
3418     AC_DEFINE(HAVE_TIFF, 1, [Define to 1 if you have the tiff library (-ltiff).])
3419     dnl FIXME -lz -lm, as per libpng?
3420     LIBTIFF=-ltiff
3421   fi
3422 fi
3423 AC_SUBST(LIBTIFF)
3424
3425 ### Use -lgif or -lungif if available, unless '--with-gif=no'.
3426 ### mingw32 doesn't use -lgif/-lungif, since it loads the library dynamically.
3427 HAVE_GIF=no
3428 LIBGIF=
3429 if test "${opsys}" = "mingw32"; then
3430   if test "${with_gif}" != "no"; then
3431     AC_CHECK_HEADER(gif_lib.h, HAVE_GIF=yes, HAVE_GIF=no)
3432   fi
3433   if test "${HAVE_GIF}" = "yes"; then
3434     AC_DEFINE(HAVE_GIF, 1, [Define to 1 if you have a gif (or ungif) library.])
3435   fi
3436 elif test "${HAVE_X11}" = "yes" && test "${with_gif}" != "no" \
3437         || test "${HAVE_W32}" = "yes"; then
3438   AC_CHECK_HEADER(gif_lib.h,
3439 # EGifPutExtensionLast only exists from version libungif-4.1.0b1.
3440 # Earlier versions can crash Emacs, but version 5.0 removes EGifPutExtensionLast.
3441     [AC_CHECK_LIB(gif, GifMakeMapObject, HAVE_GIF=yes,
3442         [AC_CHECK_LIB(gif, EGifPutExtensionLast, HAVE_GIF=yes, HAVE_GIF=maybe)])])
3443
3444   if test "$HAVE_GIF" = yes; then
3445     LIBGIF=-lgif
3446   elif test "$HAVE_GIF" = maybe; then
3447 # If gif_lib.h but no libgif, try libungif.
3448     AC_CHECK_LIB(ungif, EGifPutExtensionLast, HAVE_GIF=yes, HAVE_GIF=no)
3449     test "$HAVE_GIF" = yes && LIBGIF=-lungif
3450   fi
3451
3452   if test "${HAVE_GIF}" = "yes"; then
3453     AC_DEFINE(HAVE_GIF, 1, [Define to 1 if you have a gif (or ungif) library.])
3454   fi
3455 fi
3456 AC_SUBST(LIBGIF)
3457
3458 dnl Check for required libraries.
3459 if test "${HAVE_X11}" = "yes"; then
3460   MISSING=""
3461   WITH_NO=""
3462   test "${with_xpm}" != "no" && test "${HAVE_XPM}" != "yes" &&
3463     MISSING="libXpm" && WITH_NO="--with-xpm=no"
3464   test "${with_jpeg}" != "no" && test "${HAVE_JPEG}" != "yes" &&
3465     MISSING="$MISSING libjpeg" && WITH_NO="$WITH_NO --with-jpeg=no"
3466   test "${with_png}" != "no" && test "${HAVE_PNG}" != "yes" &&
3467     MISSING="$MISSING libpng" && WITH_NO="$WITH_NO --with-png=no"
3468   test "${with_gif}" != "no" && test "${HAVE_GIF}" != "yes" &&
3469     MISSING="$MISSING libgif/libungif" && WITH_NO="$WITH_NO --with-gif=no"
3470   test "${with_tiff}" != "no" && test "${HAVE_TIFF}" != "yes" &&
3471     MISSING="$MISSING libtiff" && WITH_NO="$WITH_NO --with-tiff=no"
3472
3473   if test "X${MISSING}" != X; then
3474     AC_MSG_ERROR([The following required libraries were not found:
3475     $MISSING
3476 Maybe some development libraries/packages are missing?
3477 If you don't want to link with them give
3478     $WITH_NO
3479 as options to configure])
3480   fi
3481 fi
3482
3483 ### Use -lgpm if available, unless '--with-gpm=no'.
3484 HAVE_GPM=no
3485 LIBGPM=
3486 if test "${with_gpm}" != "no"; then
3487   AC_CHECK_HEADER(gpm.h,
3488     [AC_CHECK_LIB(gpm, Gpm_Open, HAVE_GPM=yes)])
3489
3490   if test "${HAVE_GPM}" = "yes"; then
3491     AC_DEFINE(HAVE_GPM, 1, [Define to 1 if you have the gpm library (-lgpm).])
3492     LIBGPM=-lgpm
3493   fi
3494 fi
3495 AC_SUBST(LIBGPM)
3496
3497 dnl Check for malloc/malloc.h on darwin
3498 AC_CHECK_HEADERS_ONCE(malloc/malloc.h)
3499
3500 GNUSTEP_CFLAGS=
3501 ### Use NeXTstep API to implement GUI.
3502 if test "${HAVE_NS}" = "yes"; then
3503   AC_DEFINE(HAVE_NS, 1, [Define to 1 if you are using the NeXTstep API, either GNUstep or Cocoa on Mac OS X.])
3504   if test "${NS_IMPL_COCOA}" = "yes"; then
3505     AC_DEFINE(NS_IMPL_COCOA, 1, [Define to 1 if you are using NS windowing under MacOS X.])
3506   fi
3507   if test "${NS_IMPL_GNUSTEP}" = "yes"; then
3508     AC_DEFINE(NS_IMPL_GNUSTEP, 1, [Define to 1 if you are using NS windowing under GNUstep.])
3509     if test $NS_GNUSTEP_CONFIG != yes; then
3510       # See also .m.o rule in src/Makefile.in.  */
3511       # FIXME: are all these flags really needed?  Document here why.  */
3512       GNUSTEP_CFLAGS="-D_REENTRANT -fPIC -fno-strict-aliasing -I${GNUSTEP_SYSTEM_HEADERS} ${GNUSTEP_LOCAL_HEADERS}"
3513       ## Extra CFLAGS applied to src/*.m files.
3514       GNU_OBJC_CFLAGS="$GNU_OBJC_CFLAGS -fgnu-runtime -Wno-import -fconstant-string-class=NSConstantString -DGNUSTEP_BASE_LIBRARY=1 -DGNU_GUI_LIBRARY=1 -DGNU_RUNTIME=1 -DGSWARN -DGSDIAGNOSE"
3515     fi
3516   fi
3517   OTHER_FILES=ns-app
3518 fi
3519
3520 ### Use session management (-lSM -lICE) if available
3521 HAVE_X_SM=no
3522 LIBXSM=
3523 if test "${HAVE_X11}" = "yes"; then
3524   AC_CHECK_HEADER(X11/SM/SMlib.h,
3525     [AC_CHECK_LIB(SM, SmcOpenConnection, HAVE_X_SM=yes, , -lICE)])
3526
3527   if test "${HAVE_X_SM}" = "yes"; then
3528     AC_DEFINE(HAVE_X_SM, 1, [Define to 1 if you have the SM library (-lSM).])
3529     LIBXSM="-lSM -lICE"
3530   fi
3531 fi
3532 AC_SUBST(LIBXSM)
3533
3534 ### Use XRandr (-lXrandr) if available
3535 HAVE_XRANDR=no
3536 if test "${HAVE_X11}" = "yes"; then
3537   XRANDR_REQUIRED=1.2.2
3538   XRANDR_MODULES="xrandr >= $XRANDR_REQUIRED"
3539   EMACS_CHECK_MODULES([XRANDR], [$XRANDR_MODULES])
3540   if test $HAVE_XRANDR = no; then
3541     # Test old way in case pkg-config doesn't have it (older machines).
3542     # Include Xrender.h by hand to work around bug in older Xrandr.h
3543     # (e.g. RHEL5) and silence (harmless) configure warning (bug#18465).
3544     AC_CHECK_HEADER(X11/extensions/Xrandr.h,
3545       [AC_CHECK_LIB(Xrandr, XRRGetScreenResources, HAVE_XRANDR=yes)],
3546       [], [AC_INCLUDES_DEFAULT
3547 #include <X11/extensions/Xrender.h>])
3548     if test $HAVE_XRANDR = yes; then
3549       XRANDR_LIBS=-lXrandr
3550     fi
3551   fi
3552   if test $HAVE_XRANDR = yes; then
3553     SAVE_CFLAGS="$CFLAGS"
3554     SAVE_LIBS="$LIBS"
3555     CFLAGS="$XRANDR_CFLAGS $CFLAGS"
3556     LIBS="$XRANDR_LIBS $LIBS"
3557     AC_CHECK_FUNCS(XRRGetOutputPrimary XRRGetScreenResourcesCurrent)
3558     CFLAGS="$SAVE_CFLAGS"
3559     LIBS="$SAVE_LIBS"
3560
3561     AC_DEFINE(HAVE_XRANDR, 1, [Define to 1 if you have the XRandr extension.])
3562   fi
3563 fi
3564 AC_SUBST(XRANDR_CFLAGS)
3565 AC_SUBST(XRANDR_LIBS)
3566
3567 ### Use Xinerama (-lXinerama) if available
3568 HAVE_XINERAMA=no
3569 if test "${HAVE_X11}" = "yes"; then
3570   XINERAMA_REQUIRED=1.0.2
3571   XINERAMA_MODULES="xinerama >= $XINERAMA_REQUIRED"
3572   EMACS_CHECK_MODULES([XINERAMA], [$XINERAMA_MODULES])
3573   if test $HAVE_XINERAMA = no; then
3574     # Test old way in case pkg-config doesn't have it (older machines).
3575     AC_CHECK_HEADER(X11/extensions/Xinerama.h,
3576       [AC_CHECK_LIB(Xinerama, XineramaQueryExtension, HAVE_XINERAMA=yes)])
3577     if test $HAVE_XINERAMA = yes; then
3578       XINERAMA_LIBS=-lXinerama
3579     fi
3580   fi
3581   if test $HAVE_XINERAMA = yes; then
3582     AC_DEFINE(HAVE_XINERAMA, 1, [Define to 1 if you have the Xinerama extension.])
3583   fi
3584 fi
3585 AC_SUBST(XINERAMA_CFLAGS)
3586 AC_SUBST(XINERAMA_LIBS)
3587
3588 ### Use Xfixes (-lXfixes) if available
3589 HAVE_XFIXES=no
3590 if test "${HAVE_X11}" = "yes"; then
3591   XFIXES_REQUIRED=4.0.0
3592   XFIXES_MODULES="xfixes >= $XFIXES_REQUIRED"
3593   EMACS_CHECK_MODULES([XFIXES], [$XFIXES_MODULES])
3594   if test $HAVE_XFIXES = no; then
3595     # Test old way in case pkg-config doesn't have it (older machines).
3596     AC_CHECK_HEADER(X11/extensions/Xfixes.h,
3597       [AC_CHECK_LIB(Xfixes, XFixesHideCursor, HAVE_XFIXES=yes)])
3598     if test $HAVE_XFIXES = yes; then
3599       XFIXES_LIBS=-lXfixes
3600     fi
3601   fi
3602   if test $HAVE_XFIXES = yes; then
3603     AC_DEFINE(HAVE_XFIXES, 1, [Define to 1 if you have the Xfixes extension.])
3604   fi
3605 fi
3606 AC_SUBST(XFIXES_CFLAGS)
3607 AC_SUBST(XFIXES_LIBS)
3608
3609 ### Use libxml (-lxml2) if available
3610 ### mingw32 doesn't use -lxml2, since it loads the library dynamically.
3611 HAVE_LIBXML2=no
3612 if test "${with_xml2}" != "no"; then
3613   ### I'm not sure what the version number should be, so I just guessed.
3614   EMACS_CHECK_MODULES([LIBXML2], [libxml-2.0 > 2.6.17])
3615   # Built-in libxml2 on OS X 10.8 lacks libxml-2.0.pc.
3616   if test "${HAVE_LIBXML2}" != "yes" && test "$opsys" = "darwin"; then
3617     SAVE_CPPFLAGS="$CPPFLAGS"
3618     CPPFLAGS="$CPPFLAGS -I$xcsdkdir/usr/include/libxml2"
3619     AC_CHECK_HEADER(libxml/HTMLparser.h,
3620       [AC_CHECK_DECL(HTML_PARSE_RECOVER, HAVE_LIBXML2=yes, ,
3621                      [#include <libxml/HTMLparser.h>])])
3622     CPPFLAGS="$SAVE_CPPFLAGS"
3623     if test "${HAVE_LIBXML2}" = "yes"; then
3624       LIBXML2_CFLAGS="-I'$xcsdkdir/usr/include/libxml2'"
3625       LIBXML2_LIBS="-lxml2"
3626     fi
3627   fi
3628   if test "${HAVE_LIBXML2}" = "yes"; then
3629     if test "${opsys}" != "mingw32"; then
3630       AC_CHECK_LIB(xml2, htmlReadMemory, HAVE_LIBXML2=yes, HAVE_LIBXML2=no,
3631         [$LIBXML2_LIBS])
3632     else
3633       LIBXML2_LIBS=""
3634     fi
3635     if test "${HAVE_LIBXML2}" = "yes"; then
3636       AC_DEFINE(HAVE_LIBXML2, 1, [Define to 1 if you have the libxml library (-lxml2).])
3637     else
3638       LIBXML2_LIBS=""
3639       LIBXML2_CFLAGS=""
3640     fi
3641   fi
3642 fi
3643 AC_SUBST(LIBXML2_LIBS)
3644 AC_SUBST(LIBXML2_CFLAGS)
3645
3646 # If netdb.h doesn't declare h_errno, we must declare it by hand.
3647 # On MinGW, that is provided by nt/inc/sys/socket.h and w32.c.
3648 if test "${opsys}" = "mingw32"; then
3649   emacs_cv_netdb_declares_h_errno=yes
3650 fi
3651 AC_CACHE_CHECK(whether netdb declares h_errno,
3652                emacs_cv_netdb_declares_h_errno,
3653 [AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <netdb.h>]],
3654   [[return h_errno;]])],
3655   emacs_cv_netdb_declares_h_errno=yes, emacs_cv_netdb_declares_h_errno=no)])
3656 if test $emacs_cv_netdb_declares_h_errno = yes; then
3657   AC_DEFINE(HAVE_H_ERRNO, 1, [Define to 1 if netdb.h declares h_errno.])
3658 fi
3659
3660 # Check for mail-locking functions in a "mail" library.  Probably this should
3661 # have the same check as for liblockfile below.
3662 AC_CHECK_LIB(mail, maillock, have_mail=yes, have_mail=no)
3663 if test $have_mail = yes; then
3664   LIBS_MAIL=-lmail
3665   AC_DEFINE(HAVE_LIBMAIL, 1, [Define to 1 if you have the 'mail' library (-lmail).])
3666
3667   OLD_LIBS=$LIBS
3668   LIBS="$LIBS_MAIL $LIBS"
3669   AC_CHECK_FUNCS(touchlock)
3670   LIBS=$OLD_LIBS
3671 else
3672   LIBS_MAIL=
3673 fi
3674 dnl Debian, at least:
3675 AC_CHECK_LIB(lockfile, maillock, have_lockfile=yes, have_lockfile=no)
3676 if test $have_lockfile = yes; then
3677    LIBS_MAIL=-llockfile
3678    AC_DEFINE(HAVE_LIBLOCKFILE, 1, [Define to 1 if you have the 'lockfile' library (-llockfile).])
3679 else
3680 # If we have the shared liblockfile, assume we must use it for mail
3681 # locking (e.g. Debian).  If we couldn't link against liblockfile
3682 # (no liblockfile.a installed), ensure that we don't need to.
3683   dnl This works for files generally, not just executables.
3684   dnl Should we look elsewhere for it?  Maybe examine /etc/ld.so.conf?
3685   AC_CHECK_PROG(liblockfile, liblockfile.so, yes, no,
3686                 /usr/lib:/lib:/usr/local/lib:$LD_LIBRARY_PATH)
3687   if test $ac_cv_prog_liblockfile = yes; then
3688     AC_MSG_ERROR([Shared liblockfile found but can't link against it.
3689 This probably means that movemail could lose mail.
3690 There may be a 'development' package to install containing liblockfile.])
3691   fi
3692 fi
3693 AC_CHECK_HEADERS_ONCE(maillock.h)
3694 AC_SUBST(LIBS_MAIL)
3695
3696 ## Define MAIL_USE_FLOCK (or LOCKF) if the mailer uses flock (or lockf) to
3697 ## interlock access to the mail spool.  The alternative is a lock file named
3698 ## /usr/spool/mail/$USER.lock.
3699 mail_lock=no
3700 case "$opsys" in
3701   aix4-2) mail_lock="lockf" ;;
3702
3703   gnu|freebsd|dragonfly|netbsd|openbsd|darwin|irix6-5) mail_lock="flock" ;;
3704
3705   ## On GNU/Linux systems, both methods are used by various mail programs.
3706   ## I assume most people are using newer mailers that have heard of flock.
3707   ## Change this if you need to.
3708   ## Debian contains a patch which says: "On Debian/GNU/Linux systems,
3709   ## configure gets the right answers, and that means *NOT* using flock.
3710   ## Using flock is guaranteed to be the wrong thing. See Debian Policy
3711   ## for details." and then uses '#ifdef DEBIAN'.  Unfortunately the
3712   ## Debian maintainer hasn't provided a clean fix for Emacs.
3713   ## movemail.c will use 'maillock' when MAILDIR, HAVE_LIBMAIL and
3714   ## HAVE_MAILLOCK_H are defined, so the following appears to be the
3715   ## correct logic.  -- fx
3716   ## We must check for HAVE_LIBLOCKFILE too, as movemail does.
3717   ## liblockfile is a Free Software replacement for libmail, used on
3718   ## Debian systems and elsewhere. -rfr.
3719   gnu-*)
3720     mail_lock="flock"
3721     if test $have_mail = yes || test $have_lockfile = yes; then
3722       test $ac_cv_header_maillock_h = yes && mail_lock=no
3723     fi
3724     ;;
3725
3726   mingw32)
3727     mail_lock="none-needed" ;;
3728 esac
3729
3730 BLESSMAIL_TARGET=
3731 case "$mail_lock" in
3732   flock) AC_DEFINE(MAIL_USE_FLOCK, 1, [Define if the mailer uses flock to interlock the mail spool.]) ;;
3733
3734   lockf) AC_DEFINE(MAIL_USE_LOCKF, 1, [Define if the mailer uses lockf to interlock the mail spool.]) ;;
3735
3736   none-needed) ;;
3737
3738   *) BLESSMAIL_TARGET="need-blessmail" ;;
3739 esac
3740 AC_SUBST(BLESSMAIL_TARGET)
3741
3742 OLD_LIBS=$LIBS
3743 LIBS="$LIB_PTHREAD $LIB_MATH $LIBS"
3744 AC_CHECK_FUNCS(accept4 fchdir gethostname \
3745 getrusage get_current_dir_name \
3746 lrand48 random rint \
3747 select getpagesize setlocale newlocale \
3748 getrlimit setrlimit shutdown getaddrinfo \
3749 pthread_sigmask strsignal setitimer \
3750 sendto recvfrom getsockname getpeername getifaddrs freeifaddrs \
3751 gai_strerror sync \
3752 getpwent endpwent getgrent endgrent \
3753 cfmakeraw cfsetspeed copysign __executable_start log2)
3754 LIBS=$OLD_LIBS
3755
3756 dnl No need to check for aligned_alloc and posix_memalign if using
3757 dnl gmalloc.o, as it supplies them, unless we're using hybrid_malloc.
3758 dnl Don't use these functions on Darwin as they are incompatible with
3759 dnl unexmacosx.c.
3760 if (test -z "$GMALLOC_OBJ" || test "$hybrid_malloc" = yes) \
3761   && test "$opsys" != darwin; then
3762   AC_CHECK_FUNCS([aligned_alloc posix_memalign], [break])
3763 fi
3764
3765 dnl Cannot use AC_CHECK_FUNCS
3766 AC_CACHE_CHECK([for __builtin_unwind_init],
3767                emacs_cv_func___builtin_unwind_init,
3768 [AC_LINK_IFELSE([AC_LANG_PROGRAM([], [__builtin_unwind_init ();])],
3769                 emacs_cv_func___builtin_unwind_init=yes,
3770                 emacs_cv_func___builtin_unwind_init=no)])
3771 if test $emacs_cv_func___builtin_unwind_init = yes; then
3772   AC_DEFINE(HAVE___BUILTIN_UNWIND_INIT, 1,
3773             [Define to 1 if you have the '__builtin_unwind_init' function.])
3774 fi
3775
3776 AC_CHECK_HEADERS_ONCE(sys/un.h)
3777
3778 AC_FUNC_FSEEKO
3779
3780 # UNIX98 PTYs.
3781 AC_CHECK_FUNCS(grantpt)
3782
3783 # PTY-related GNU extensions.
3784 AC_CHECK_FUNCS(getpt posix_openpt)
3785
3786 # Check this now, so that we will NOT find the above functions in ncurses.
3787 # That is because we have not set up to link ncurses in lib-src.
3788 # It's better to believe a function is not available
3789 # than to expect to find it in ncurses.
3790 # Also we need tputs and friends to be able to build at all.
3791 AC_MSG_CHECKING([for library containing tputs])
3792 # Run a test program that contains a call to tputs, a call that is
3793 # never executed.  This tests whether a pre-'main' dynamic linker
3794 # works with the library.  It's too much trouble to actually call
3795 # tputs in the test program, due to portability hassles.  When
3796 # cross-compiling, assume the test program will run if it links.
3797 AC_DEFUN([tputs_link_source], [
3798   AC_LANG_SOURCE(
3799      [[extern void tputs (const char *, int, int (*)(int));
3800        int main (int argc, char **argv)
3801        {
3802           if (argc == 10000)
3803             tputs (argv[0], 0, 0);
3804           return 0;
3805        }]])
3806 ])
3807 if test "${opsys}" = "mingw32"; then
3808   msg='none required'
3809 else
3810   # Maybe curses should be tried earlier?
3811   # See http://debbugs.gnu.org/cgi/bugreport.cgi?bug=9736#35
3812   for tputs_library in '' tinfo ncurses terminfo termcap curses; do
3813     OLIBS=$LIBS
3814     if test -z "$tputs_library"; then
3815       LIBS_TERMCAP=
3816       msg='none required'
3817     else
3818       LIBS_TERMCAP=-l$tputs_library
3819       msg=$LIBS_TERMCAP
3820       LIBS="$LIBS_TERMCAP $LIBS"
3821     fi
3822     AC_RUN_IFELSE([tputs_link_source], [], [msg=no],
3823       [AC_LINK_IFELSE([tputs_link_source], [], [msg=no])])
3824     LIBS=$OLIBS
3825     if test "X$msg" != Xno; then
3826       break
3827     fi
3828   done
3829 fi
3830 AC_MSG_RESULT([$msg])
3831 if test "X$msg" = Xno; then
3832   AC_MSG_ERROR([The required function 'tputs' was not found in any library.
3833 The following libraries were tried (in order):
3834   libtinfo, libncurses, libterminfo, libtermcap, libcurses
3835 Please try installing whichever of these libraries is most appropriate
3836 for your system, together with its header files.
3837 For example, a libncurses-dev(el) or similar package.])
3838 fi
3839
3840 ## Use termcap instead of terminfo?
3841 ## Only true for: freebsd < 40000, ms-w32, msdos, netbsd < 599002500.
3842 TERMINFO=yes
3843 ## FIXME?  In the cases below where we unconditionally set
3844 ## LIBS_TERMCAP="-lncurses", this overrides LIBS_TERMCAP = -ltinfo,
3845 ## if that was found above to have tputs.
3846 ## Should we use the gnu* logic everywhere?
3847 case "$opsys" in
3848   ## darwin: Prevents crashes when running Emacs in Terminal.app under 10.2.
3849   ##  The ncurses library has been moved out of the System framework in
3850   ##  Mac OS X 10.2.  So if configure detects it, set the command-line
3851   ##  option to use it.
3852   darwin) LIBS_TERMCAP="-lncurses" ;;
3853
3854   gnu*) test -z "$LIBS_TERMCAP" && LIBS_TERMCAP="-lncurses" ;;
3855
3856   freebsd)
3857     AC_MSG_CHECKING([whether FreeBSD is new enough to use terminfo])
3858     AC_CACHE_VAL(emacs_cv_freebsd_terminfo,
3859     [AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <osreldate.h>]],
3860 [[#if __FreeBSD_version < 400000
3861 fail;
3862 #endif
3863 ]])], emacs_cv_freebsd_terminfo=yes, emacs_cv_freebsd_terminfo=no)])
3864
3865     AC_MSG_RESULT($emacs_cv_freebsd_terminfo)
3866
3867     if test $emacs_cv_freebsd_terminfo = yes; then
3868       LIBS_TERMCAP="-lncurses"
3869     else
3870       TERMINFO=no
3871       LIBS_TERMCAP="-ltermcap"
3872     fi
3873     ;;
3874
3875   mingw32)
3876     TERMINFO=no
3877     LIBS_TERMCAP=
3878     ;;
3879
3880   netbsd)
3881     if test "x$LIBS_TERMCAP" != "x-lterminfo"; then
3882       TERMINFO=no
3883       LIBS_TERMCAP="-ltermcap"
3884     fi
3885     ;;
3886
3887   openbsd | dragonfly) LIBS_TERMCAP="-lncurses" ;;
3888
3889   ## hpux: Make sure we get select from libc rather than from libcurses
3890   ##  because libcurses on HPUX 10.10 has a broken version of select.
3891   ##  We used to use -lc -lcurses, but this may be cleaner.
3892   ## FIXME?  But TERMINFO = yes on hpux (it used to be explicitly
3893   # set that way, now it uses the default).  Isn't this a contradiction?
3894   hpux*) LIBS_TERMCAP="-ltermcap" ;;
3895
3896 esac
3897
3898 TERMCAP_OBJ=tparam.o
3899 if test $TERMINFO = yes; then
3900   AC_DEFINE(TERMINFO, 1, [Define to 1 if you use terminfo instead of termcap.])
3901   TERMCAP_OBJ=terminfo.o
3902 fi
3903 if test "X$LIBS_TERMCAP" = "X-lncurses"; then
3904   AC_DEFINE(USE_NCURSES, 1, [Define to 1 if you use ncurses.])
3905 fi
3906 AC_SUBST(LIBS_TERMCAP)
3907 AC_SUBST(TERMCAP_OBJ)
3908
3909 # GNU/Linux-specific timer functions.
3910 AC_CACHE_CHECK([for timerfd interface], [emacs_cv_have_timerfd],
3911   [AC_COMPILE_IFELSE(
3912      [AC_LANG_PROGRAM([[#include <sys/timerfd.h>
3913                       ]],
3914                       [[timerfd_create (CLOCK_REALTIME,
3915                                         TFD_CLOEXEC | TFD_NONBLOCK);
3916                         timerfd_settime (0, TFD_TIMER_ABSTIME, 0, 0);]])],
3917      [emacs_cv_have_timerfd=yes],
3918      [emacs_cv_have_timerfd=no])])
3919 if test "$emacs_cv_have_timerfd" = yes; then
3920   AC_DEFINE([HAVE_TIMERFD], 1,
3921     [Define to 1 if timerfd functions are supported as in GNU/Linux.])
3922 fi
3923
3924 # Alternate stack for signal handlers.
3925 AC_CACHE_CHECK([whether signals can be handled on alternate stack],
3926                [emacs_cv_alternate_stack],
3927   [AC_COMPILE_IFELSE(
3928      [AC_LANG_PROGRAM([[#include <signal.h>
3929                       ]],
3930                       [[stack_t ss;
3931                         struct sigaction sa;
3932                         ss.ss_sp = malloc (SIGSTKSZ);
3933                         ss.ss_size = SIGSTKSZ;
3934                         sa.sa_flags = SA_SIGINFO | SA_ONSTACK;
3935                         sigaltstack (&ss, 0);
3936                         sigaction (SIGSEGV, &sa, 0);]])],
3937      [emacs_cv_alternate_stack=yes],
3938      [emacs_cv_alternate_stack=no])])
3939
3940 # Do we have res_init, for detecting changes in /etc/resolv.conf?
3941 # On Darwin, res_init appears not to be useful: see bug#562 and
3942 # http://lists.gnu.org/archive/html/emacs-devel/2007-11/msg01467.html
3943 resolv=no
3944
3945 if test $opsys != darwin; then
3946
3947   AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <netinet/in.h>
3948 #include <arpa/nameser.h>
3949 #include <resolv.h>]],
3950     [[return res_init();]])],
3951     have_res_init=yes, have_res_init=no)
3952   if test "$have_res_init" = no; then
3953     OLIBS="$LIBS"
3954     LIBS="$LIBS -lresolv"
3955     AC_MSG_CHECKING(for res_init with -lresolv)
3956     AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <netinet/in.h>
3957 #include <arpa/nameser.h>
3958 #include <resolv.h>]],
3959       [[return res_init();]])],
3960       have_res_init=yes, have_res_init=no)
3961     AC_MSG_RESULT($have_res_init)
3962     if test "$have_res_init" = yes ; then
3963       resolv=yes
3964     fi
3965     LIBS="$OLIBS"
3966   fi
3967
3968   if test "$have_res_init" = yes; then
3969     AC_DEFINE(HAVE_RES_INIT, 1, [Define to 1 if res_init is available.])
3970   fi
3971 fi                              dnl !darwin
3972
3973 # Do we need the Hesiod library to provide the support routines?
3974 dnl FIXME?  Should we be skipping this on Darwin too?
3975 LIBHESIOD=
3976 if test "$with_hesiod" != no ; then
3977   # Don't set $LIBS here -- see comments above.  FIXME which comments?
3978   AC_CHECK_FUNC(res_send, , [AC_CHECK_FUNC(__res_send, ,
3979      [AC_CHECK_LIB(resolv, res_send, resolv=yes,
3980                   [AC_CHECK_LIB(resolv, __res_send, resolv=yes)])])])
3981   if test "$resolv" = yes ; then
3982     RESOLVLIB=-lresolv
3983   else
3984     RESOLVLIB=
3985   fi
3986   AC_CHECK_FUNC(hes_getmailhost, , [AC_CHECK_LIB(hesiod, hes_getmailhost,
3987         hesiod=yes, :, $RESOLVLIB)])
3988
3989   if test x"$hesiod" = xyes; then
3990     LIBHESIOD=-lhesiod
3991   fi
3992 fi
3993 AC_SUBST(LIBHESIOD)
3994
3995 # Do we need libresolv (due to res_init or Hesiod)?
3996 if test "$resolv" = yes && test $opsys != darwin; then
3997   LIBRESOLV=-lresolv
3998 else
3999   LIBRESOLV=
4000 fi
4001 AC_SUBST(LIBRESOLV)
4002
4003 # These tell us which Kerberos-related libraries to use.
4004 COM_ERRLIB=
4005 CRYPTOLIB=
4006 KRB5LIB=
4007 DESLIB=
4008 KRB4LIB=
4009
4010 if test "${with_kerberos}" != no; then
4011   OLD_LIBS=$LIBS
4012   AC_CHECK_LIB(com_err, com_err, have_com_err=yes, have_com_err=no)
4013   if test $have_com_err = yes; then
4014     COM_ERRLIB=-lcom_err
4015     LIBS="$COM_ERRLIB $LIBS"
4016   fi
4017   AC_CHECK_LIB(crypto, mit_des_cbc_encrypt, have_crypto=yes, have_crypto=no)
4018   if test $have_crypto = yes; then
4019     CRYPTOLIB=-lcrypto
4020     LIBS="$CRYPTOLIB $LIBS"
4021   fi
4022   AC_CHECK_LIB(k5crypto, mit_des_cbc_encrypt, have_k5crypto=yes, have_k5crypto=no)
4023   if test $have_k5crypto = yes; then
4024     CRYPTOLIB=-lk5crypto
4025     LIBS="$CRYPTOLIB $LIBS"
4026   fi
4027   AC_CHECK_LIB(krb5, krb5_init_context, have_krb5=yes, have_krb5=no)
4028   if test $have_krb5=yes; then
4029     KRB5LIB=-lkrb5
4030     LIBS="$KRB5LIB $LIBS"
4031   fi
4032   dnl FIXME Simplify.  Does not match 22 logic, thanks to default_off?
4033   if test "${with_kerberos5}" = no; then
4034     AC_CHECK_LIB(des425, des_cbc_encrypt, have_des425=yes, have_des425=no )
4035     if test $have_des425 = yes; then
4036       DESLIB=-ldes425
4037       LIBS="$DESLIB $LIBS"
4038     else
4039       AC_CHECK_LIB(des, des_cbc_encrypt, have_des=yes, have_des=no)
4040       if test $have_des = yes; then
4041         DESLIB=-ldes
4042         LIBS="$DESLIB $LIBS"
4043       fi
4044     fi
4045     AC_CHECK_LIB(krb4, krb_get_cred, have_krb4=yes, have_krb4=no)
4046     if test $have_krb4 = yes; then
4047       KRB4LIB=-lkrb4
4048       LIBS="$KRB4LIB $LIBS"
4049     else
4050       AC_CHECK_LIB(krb, krb_get_cred, have_krb=yes, have_krb=no)
4051       if test $have_krb = yes; then
4052         KRB4LIB=-lkrb
4053         LIBS="$KRB4LIB $LIBS"
4054       fi
4055     fi
4056   fi
4057
4058   if test "${with_kerberos5}" != no; then
4059     AC_CHECK_HEADERS(krb5.h,
4060       [AC_CHECK_MEMBERS([krb5_error.text, krb5_error.e_text],,,
4061                         [#include <krb5.h>])])
4062   else
4063     AC_CHECK_HEADERS(krb.h,,
4064                      [AC_CHECK_HEADERS(kerberosIV/krb.h,,
4065                                        [AC_CHECK_HEADERS(kerberos/krb.h)])])
4066   fi
4067   AC_CHECK_HEADERS(com_err.h)
4068   LIBS=$OLD_LIBS
4069 fi
4070
4071 AC_SUBST(COM_ERRLIB)
4072 AC_SUBST(CRYPTOLIB)
4073 AC_SUBST(KRB5LIB)
4074 AC_SUBST(DESLIB)
4075 AC_SUBST(KRB4LIB)
4076
4077 AC_CHECK_HEADERS(valgrind/valgrind.h)
4078
4079 AC_CHECK_MEMBERS([struct unipair.unicode], [], [], [[#include <linux/kd.h>]])
4080
4081 AC_CHECK_FUNCS_ONCE(tzset)
4082
4083 ok_so_far=yes
4084 AC_CHECK_FUNC(socket, , ok_so_far=no)
4085 if test $ok_so_far = yes; then
4086   AC_CHECK_HEADER(netinet/in.h, , ok_so_far=no)
4087 fi
4088 if test $ok_so_far = yes; then
4089   AC_CHECK_HEADER(arpa/inet.h, , ok_so_far=no)
4090 fi
4091 if test $ok_so_far = yes; then
4092 dnl Fixme: Not used.  Should this be HAVE_SOCKETS?
4093   AC_DEFINE(HAVE_INET_SOCKETS, 1,
4094             [Define to 1 if you have inet sockets.])
4095 fi
4096
4097 AC_FUNC_FORK
4098
4099 AC_CHECK_FUNCS(snprintf)
4100
4101 dnl Check for glib.  This differs from other library checks in that
4102 dnl Emacs need not link to glib unless some other library is already
4103 dnl linking to glib.  Although glib provides no facilities that Emacs
4104 dnl needs for its own purposes, when glib is present Emacs needs to
4105 dnl use primitives like g_main_context_query to avoid clashing with
4106 dnl glib at a low level.
4107 dnl
4108 dnl Check this late, since it depends on $GTK_CFLAGS etc.
4109 XGSELOBJ=
4110 OLDCFLAGS="$CFLAGS"
4111 OLDLIBS="$LIBS"
4112 CFLAGS="$CFLAGS $GTK_CFLAGS $RSVG_CFLAGS $DBUS_CFLAGS $SETTINGS_CFLAGS"
4113 LIBS="$LIBS $GTK_LIBS $RSVG_LIBS $DBUS_LIBS $SETTINGS_LIBS"
4114 CFLAGS="$CFLAGS $GFILENOTIFY_CFLAGS $CAIRO_CFLAGS"
4115 LIBS="$LIBS $GFILENOTIFY_LIBS $CAIRO_LIBS"
4116 AC_MSG_CHECKING([whether GLib is linked in])
4117 AC_LINK_IFELSE([AC_LANG_PROGRAM(
4118         [[#include <glib.h>
4119         ]],
4120         [[g_print ("Hello world");]])],
4121      [links_glib=yes],
4122      [links_glib=no])
4123 AC_MSG_RESULT([$links_glib])
4124 if test "${links_glib}" = "yes"; then
4125   AC_DEFINE(HAVE_GLIB, 1, [Define to 1 if GLib is linked in.])
4126   if test "$HAVE_NS" = no;then
4127     XGSELOBJ=xgselect.o
4128   fi
4129 fi
4130 CFLAGS="$OLDCFLAGS"
4131 LIBS="$OLDLIBS"
4132 AC_SUBST(XGSELOBJ)
4133
4134 dnl Adapted from Haible's version.
4135 AC_CACHE_CHECK([for nl_langinfo and CODESET], emacs_cv_langinfo_codeset,
4136   [AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <langinfo.h>]],
4137     [[char* cs = nl_langinfo(CODESET);]])],
4138     emacs_cv_langinfo_codeset=yes,
4139     emacs_cv_langinfo_codeset=no)
4140   ])
4141 if test $emacs_cv_langinfo_codeset = yes; then
4142   AC_DEFINE(HAVE_LANGINFO_CODESET, 1,
4143     [Define if you have <langinfo.h> and nl_langinfo(CODESET).])
4144 fi
4145
4146 AC_TYPE_MBSTATE_T
4147
4148 dnl Fixme: AC_SYS_POSIX_TERMIOS should probably be used, but it's not clear
4149 dnl how the tty code is related to POSIX and/or other versions of termios.
4150 dnl The following looks like a useful start.
4151 dnl
4152 dnl AC_SYS_POSIX_TERMIOS
4153 dnl if test $ac_cv_sys_posix_termios = yes; then
4154 dnl    AC_DEFINE(HAVE_TERMIOS, 1, [Define to 1 if you have POSIX-style functions
4155 dnl                                and macros for terminal control.])
4156 dnl    AC_DEFINE(HAVE_TCATTR, 1, [Define to 1 if you have tcgetattr and tcsetattr.])
4157 dnl fi
4158
4159 dnl Turned on June 1996 supposing nobody will mind it.
4160 dnl MinGW emulates passwd database, so this feature doesn't make sense there.
4161 if test "${opsys}" != "mingw32"; then
4162    AC_DEFINE(AMPERSAND_FULL_NAME, 1, [Define to use the convention that &
4163      in the full name stands for the login id.])
4164 fi
4165
4166 dnl Everybody supports this, except MS.
4167 dnl Seems like the kind of thing we should be testing for, though.
4168 ## Note: PTYs are broken on darwin <6.  Use at your own risk.
4169 if test "${opsys}" != "mingw32"; then
4170   AC_DEFINE(HAVE_PTYS, 1, [Define if the system supports pty devices.])
4171 fi
4172
4173 dnl Everybody supports this, except MS-DOS.
4174 dnl Seems like the kind of thing we should be testing for, though.
4175 dnl Compare with HAVE_INET_SOCKETS (which is unused...) above.
4176 AC_DEFINE(HAVE_SOCKETS, 1, [Define if the system supports
4177   4.2-compatible sockets.])
4178
4179 AH_TEMPLATE(INTERNAL_TERMINAL, [This is substituted when $TERM is "internal".])
4180
4181 AH_TEMPLATE(NULL_DEVICE, [Name of the file to open to get
4182   a null file, or a data sink.])
4183 if test "${opsys}" = "mingw32"; then
4184   AC_DEFINE(NULL_DEVICE, ["NUL:"])
4185 else
4186   AC_DEFINE(NULL_DEVICE, ["/dev/null"])
4187 fi
4188
4189 if test "${opsys}" = "mingw32"; then
4190   SEPCHAR=';'
4191 else
4192   SEPCHAR=':'
4193 fi
4194 AC_DEFINE_UNQUOTED(SEPCHAR, ['$SEPCHAR'], [Character that separates PATH elements.])
4195 dnl This is for MinGW, and is used in test/automated/Makefile.in.
4196 dnl The MSYS Bash has heuristics for replacing ':' with ';' when it
4197 dnl decides that a command-line argument to be passed to a MinGW program
4198 dnl is a PATH-style list of directories.  But that heuristics plays it
4199 dnl safe, and only does the replacement when it is _absolutely_ sure it
4200 dnl sees a colon-separated list of file names; e.g. ":." is left alone,
4201 dnl which breaks in-tree builds.  So we do this manually instead.
4202 dnl Note that we cannot rely on PATH_SEPARATOR, as that one will always
4203 dnl be computed as ':' in MSYS Bash.
4204 AC_SUBST(SEPCHAR)
4205
4206 dnl Everybody supports this, except MS-DOS.
4207 AC_DEFINE(subprocesses, 1, [Define to enable asynchronous subprocesses.])
4208
4209 AC_DEFINE(USER_FULL_NAME, [pw->pw_gecos], [How to get a user's full name.])
4210
4211
4212 AC_DEFINE(DIRECTORY_SEP, ['/'],
4213   [Character that separates directories in a file name.])
4214
4215 if test "${opsys}" = "mingw32"; then
4216   AC_DEFINE(IS_DEVICE_SEP(_c_), [((_c_) == ':')],
4217     [Returns true if character is a device separator.])
4218
4219   AC_DEFINE(IS_DIRECTORY_SEP(_c_), [((_c_) == '/' || (_c_) == '\\')],
4220     [Returns true if character is a directory separator.])
4221
4222   AC_DEFINE(IS_ANY_SEP(_c_), [(IS_DIRECTORY_SEP (_c_) || IS_DEVICE_SEP(_c_))],
4223     [Returns true if character is any form of separator.])
4224 else
4225   AC_DEFINE(IS_DEVICE_SEP(_c_), 0,
4226     [Returns true if character is a device separator.])
4227
4228   AC_DEFINE(IS_DIRECTORY_SEP(_c_), [((_c_) == DIRECTORY_SEP)],
4229     [Returns true if character is a directory separator.])
4230
4231   AC_DEFINE(IS_ANY_SEP(_c_), [(IS_DIRECTORY_SEP (_c_))],
4232     [Returns true if character is any form of separator.])
4233 fi
4234
4235 AH_TEMPLATE(NO_EDITRES, [Define if XEditRes should not be used.])
4236
4237 case $opsys in
4238   aix4-2)
4239     dnl Unfortunately without libXmu we cannot support EditRes.
4240     if test "x$ac_cv_search_XmuConvertStandardSelection" = xno; then
4241       AC_DEFINE(NO_EDITRES, 1)
4242     fi
4243     ;;
4244
4245   hpux*)
4246     dnl Assar Westerlund <assar@sics.se> says this is necessary for
4247     dnl HP-UX 10.20, and that it works for HP-UX 0 as well.
4248     AC_DEFINE(NO_EDITRES, 1)
4249     ;;
4250 esac
4251
4252
4253 case $opsys in
4254   irix6-5 | sol2* | unixware )
4255     dnl Some SVr4s don't define NSIG in sys/signal.h for ANSI environments;
4256     dnl instead, there's a system variable _sys_nsig.  Unfortunately, we
4257     dnl need the constant to dimension an array.  So wire in the appropriate
4258     dnl value here.
4259     AC_DEFINE(NSIG_MINIMUM, 32, [Minimum value of NSIG.])
4260     ;;
4261 esac
4262
4263 emacs_broken_SIGIO=no
4264
4265 case $opsys in
4266   dnl SIGIO exists, but the feature doesn't work in the way Emacs needs.
4267   dnl See eg <http://article.gmane.org/gmane.os.openbsd.ports/46831>.
4268   hpux* | irix6-5 | nacl | openbsd | sol2* | unixware )
4269     emacs_broken_SIGIO=yes
4270     ;;
4271
4272   aix4-2)
4273     dnl On AIX Emacs uses the gmalloc.c malloc implementation.  But given
4274     dnl the way this system works, libc functions that return malloced
4275     dnl memory use the libc malloc implementation. Calling xfree or
4276     dnl xrealloc on the results of such functions results in a crash.
4277     dnl
4278     dnl One solution for this could be to define SYSTEM_MALLOC in configure,
4279     dnl but that does not currently work on this system.
4280     dnl
4281     dnl It is possible to completely override the malloc implementation on
4282     dnl AIX, but that involves putting the malloc functions in a shared
4283     dnl library and setting the MALLOCTYPE environment variable to point to
4284     dnl that shared library.
4285     dnl
4286     dnl Emacs currently calls xrealloc on the results of get_current_dir name,
4287     dnl to avoid a crash just use the Emacs implementation for that function.
4288     dnl
4289     dnl FIXME We could change the AC_CHECK_FUNCS call near the start
4290     dnl of this file, so that we do not check for get_current_dir_name
4291     dnl on AIX.  But that might be fragile if something else ends
4292     dnl up testing for get_current_dir_name as a dependency.
4293     AC_DEFINE(BROKEN_GET_CURRENT_DIR_NAME, 1, [Define if
4294       get_current_dir_name should not be used.])
4295     ;;
4296
4297   freebsd)
4298     dnl Circumvent a bug in FreeBSD.  In the following sequence of
4299     dnl writes/reads on a PTY, read(2) returns bogus data:
4300     dnl
4301     dnl write(2)  1022 bytes
4302     dnl write(2)   954 bytes, get EAGAIN
4303     dnl read(2)   1024 bytes in process_read_output
4304     dnl read(2)     11 bytes in process_read_output
4305     dnl
4306     dnl That is, read(2) returns more bytes than have ever been written
4307     dnl successfully.  The 1033 bytes read are the 1022 bytes written
4308     dnl successfully after processing (for example with CRs added if the
4309     dnl terminal is set up that way which it is here).  The same bytes will
4310     dnl be seen again in a later read(2), without the CRs.
4311     AC_DEFINE(BROKEN_PTY_READ_AFTER_EAGAIN, 1, [Define on FreeBSD to
4312       work around an issue when reading from a PTY.])
4313     ;;
4314 esac
4315
4316 case $opsys in
4317   gnu-* | sol2-10 )
4318     dnl FIXME Can't we test if this exists (eg /proc/$$)?
4319     AC_DEFINE(HAVE_PROCFS, 1, [Define if you have the /proc filesystem.])
4320   ;;
4321 esac
4322
4323 case $opsys in
4324   darwin | dragonfly | freebsd | netbsd | openbsd )
4325     AC_DEFINE(DONT_REOPEN_PTY, 1, [Define if process.c does not need to
4326       close a pty to make it a controlling terminal (it is already a
4327       controlling terminal of the subprocess, because we did ioctl TIOCSCTTY).])
4328   ;;
4329 esac
4330
4331 dnl FIXME Surely we can test for this rather than hard-code it.
4332 case $opsys in
4333   netbsd | openbsd) sound_device="/dev/audio" ;;
4334   *) sound_device="/dev/dsp" ;;
4335 esac
4336
4337 dnl Used in sound.c
4338 AC_DEFINE_UNQUOTED(DEFAULT_SOUND_DEVICE, "$sound_device",
4339   [Name of the default sound device.])
4340
4341
4342 dnl Emacs can read input using SIGIO and buffering characters itself,
4343 dnl or using CBREAK mode and making C-g cause SIGINT.
4344 dnl The choice is controlled by the variable interrupt_input.
4345 dnl
4346 dnl Define INTERRUPT_INPUT to make interrupt_input = 1 the default (use SIGIO)
4347 dnl
4348 dnl Emacs uses the presence of the USABLE_SIGIO macro
4349 dnl to indicate whether or not signal-driven I/O is possible.  It uses
4350 dnl INTERRUPT_INPUT to decide whether to use it by default.
4351 dnl
4352 dnl SIGIO can be used only on systems that implement it (4.2 and 4.3).
4353 dnl CBREAK mode has two disadvantages
4354 dnl 1) At least in 4.2, it is impossible to handle the Meta key properly.
4355 dnl I hear that in system V this problem does not exist.
4356 dnl 2) Control-G causes output to be discarded.
4357 dnl I do not know whether this can be fixed in system V.
4358 dnl
4359 dnl Another method of doing input is planned but not implemented.
4360 dnl It would have Emacs fork off a separate process
4361 dnl to read the input and send it to the true Emacs process
4362 dnl through a pipe.
4363 case $opsys in
4364   darwin | gnu-linux | gnu-kfreebsd )
4365     AC_DEFINE(INTERRUPT_INPUT, 1, [Define to read input using SIGIO.])
4366   ;;
4367 esac
4368
4369
4370 dnl If the system's imake configuration file defines 'NeedWidePrototypes'
4371 dnl as 'NO', we must define NARROWPROTO manually.  Such a define is
4372 dnl generated in the Makefile generated by 'xmkmf'.  If we don't define
4373 dnl NARROWPROTO, we will see the wrong function prototypes for X functions
4374 dnl taking float or double parameters.
4375 case $opsys in
4376   cygwin|gnu|gnu-linux|gnu-kfreebsd|irix6-5|freebsd|netbsd|openbsd)
4377     AC_DEFINE(NARROWPROTO, 1, [Define if system's imake configuration
4378       file defines 'NeedWidePrototypes' as 'NO'.])
4379   ;;
4380 esac
4381
4382
4383 dnl Used in process.c, this must be a loop, even if it only runs once.
4384 dnl (Except on SGI; see below.  Take that, clarity and consistency!)
4385 AH_TEMPLATE(PTY_ITERATION, [How to iterate over PTYs.])
4386 dnl Only used if !PTY_ITERATION.  Iterate from FIRST_PTY_LETTER to z,
4387 dnl trying suffixes 0-16.
4388 AH_TEMPLATE(FIRST_PTY_LETTER, [Letter to use in finding device name of
4389   first PTY, if PTYs are supported.])
4390 AH_TEMPLATE(PTY_OPEN, [How to open a PTY, if non-standard.])
4391 AH_TEMPLATE(PTY_NAME_SPRINTF, [How to get the device name of the control
4392   end of a PTY, if non-standard.])
4393 AH_TEMPLATE(PTY_TTY_NAME_SPRINTF, [How to get device name of the tty
4394   end of a PTY, if non-standard.])
4395
4396 case $opsys in
4397   aix4-2 )
4398     AC_DEFINE(PTY_ITERATION, [int c; for (c = 0; !c ; c++)])
4399     dnl You allocate a pty by opening /dev/ptc to get the master side.
4400     dnl To get the name of the slave side, you just ttyname() the master side.
4401     AC_DEFINE(PTY_NAME_SPRINTF, [strcpy (pty_name, "/dev/ptc");])
4402     AC_DEFINE(PTY_TTY_NAME_SPRINTF, [strcpy (pty_name, ttyname (fd));])
4403     ;;
4404
4405   cygwin )
4406     AC_DEFINE(PTY_ITERATION, [int i; for (i = 0; i < 1; i++)])
4407     dnl multi-line AC_DEFINEs are hard. :(
4408     AC_DEFINE(PTY_OPEN, [ do { int dummy; sigset_t blocked, procmask; sigemptyset (&blocked); sigaddset (&blocked, SIGCHLD); pthread_sigmask (SIG_BLOCK, &blocked, &procmask); if (-1 == openpty (&fd, &dummy, pty_name, 0, 0)) fd = -1; pthread_sigmask (SIG_SETMASK, &procmask, 0); if (fd >= 0) emacs_close (dummy); } while (false)])
4409     AC_DEFINE(PTY_NAME_SPRINTF, [])
4410     AC_DEFINE(PTY_TTY_NAME_SPRINTF, [])
4411     ;;
4412
4413   gnu | openbsd )
4414     AC_DEFINE(FIRST_PTY_LETTER, ['p'])
4415     ;;
4416
4417   gnu-linux | gnu-kfreebsd | dragonfly | freebsd | netbsd | darwin | nacl )
4418     dnl if HAVE_GRANTPT
4419     if test "x$ac_cv_func_grantpt" = xyes; then
4420       AC_DEFINE(UNIX98_PTYS, 1, [Define if the system has Unix98 PTYs.])
4421       AC_DEFINE(PTY_ITERATION, [int i; for (i = 0; i < 1; i++)])
4422       dnl Note that grantpt and unlockpt may fork.  We must block SIGCHLD
4423       dnl to prevent sigchld_handler from intercepting the child's death.
4424       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); }])
4425       dnl if HAVE_POSIX_OPENPT
4426       if test "x$ac_cv_func_posix_openpt" = xyes; then
4427         AC_DEFINE(PTY_OPEN, [do { fd = posix_openpt (O_RDWR | O_CLOEXEC | O_NOCTTY); if (fd < 0 && errno == EINVAL) fd = posix_openpt (O_RDWR | O_NOCTTY); } while (false)])
4428         AC_DEFINE(PTY_NAME_SPRINTF, [])
4429       dnl if HAVE_GETPT
4430       elif test "x$ac_cv_func_getpt" = xyes; then
4431         AC_DEFINE(PTY_OPEN, [fd = getpt ()])
4432         AC_DEFINE(PTY_NAME_SPRINTF, [])
4433       else
4434         AC_DEFINE(PTY_NAME_SPRINTF, [strcpy (pty_name, "/dev/ptmx");])
4435       fi
4436     else
4437       AC_DEFINE(FIRST_PTY_LETTER, ['p'])
4438     fi
4439     ;;
4440
4441   hpux*)
4442     AC_DEFINE(FIRST_PTY_LETTER, ['p'])
4443     AC_DEFINE(PTY_NAME_SPRINTF, [sprintf (pty_name, "/dev/ptym/pty%c%x", c, i);])
4444     AC_DEFINE(PTY_TTY_NAME_SPRINTF, [sprintf (pty_name, "/dev/pty/tty%c%x", c, i);])
4445     ;;
4446
4447   irix6-5 )
4448     dnl It looks like this cannot be right, because it is not a loop.
4449     dnl However, process.c actually does this:
4450     dnl # ifndef __sgi
4451     dnl   continue;
4452     dnl # else
4453     dnl   return -1;
4454     dnl # endif
4455     dnl which presumably makes it OK, since irix == sgi (?).
4456     dnl FIXME it seems like this special treatment is unnecessary?
4457     dnl Why can't irix use a single-trip loop like eg cygwin?
4458     AC_DEFINE(PTY_ITERATION, [])
4459     dnl Not used, because PTY_ITERATION is defined.
4460     AC_DEFINE(FIRST_PTY_LETTER, ['q'])
4461     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); }])
4462     dnl No need to get the pty name at all.
4463     AC_DEFINE(PTY_NAME_SPRINTF, [])
4464     dnl No need to use sprintf to get the tty name--we get that from _getpty.
4465     AC_DEFINE(PTY_TTY_NAME_SPRINTF, [])
4466     ;;
4467
4468   sol2* )
4469     dnl On SysVr4, grantpt(3) forks a subprocess, so do not use
4470     dnl O_CLOEXEC when opening the pty, and keep the SIGCHLD handler
4471     dnl from intercepting that death.  If any child but grantpt's should die
4472     dnl within, it should be caught after sigrelse(2).
4473     AC_DEFINE(PTY_OPEN, [fd = open (pty_name, O_RDWR | O_NONBLOCK)])
4474     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); }])
4475     ;;
4476
4477   unixware )
4478     dnl Comments are as per sol2*.
4479     AC_DEFINE(PTY_OPEN, [fd = open (pty_name, O_RDWR | O_NONBLOCK)])
4480     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); }])
4481     ;;
4482 esac
4483
4484
4485 case $opsys in
4486   sol2* | unixware )
4487     dnl This change means that we don't loop through allocate_pty too
4488     dnl many times in the (rare) event of a failure.
4489     AC_DEFINE(FIRST_PTY_LETTER, ['z'])
4490     AC_DEFINE(PTY_NAME_SPRINTF, [strcpy (pty_name, "/dev/ptmx");])
4491     dnl Push various streams modules onto a PTY channel.  Used in process.c.
4492     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.])
4493     ;;
4494 esac
4495
4496
4497 AH_TEMPLATE(SIGNALS_VIA_CHARACTERS, [Make process_send_signal work by
4498 "typing" a signal character on the pty.])
4499
4500 case $opsys in
4501   dnl Perry Smith <pedz@ddivt1.austin.ibm.com> says this is correct for AIX.
4502   dnl thomas@mathematik.uni-bremen.de says this is needed for IRIX.
4503   aix4-2 | cygwin | gnu | irix6-5 | dragonfly | freebsd | netbsd | openbsd | darwin )
4504     AC_DEFINE(SIGNALS_VIA_CHARACTERS, 1)
4505     ;;
4506
4507   dnl 21 Jun 06: Eric Hanchrow <offby1@blarg.net> says this works.
4508   dnl FIXME Does gnu-kfreebsd have linux/version.h?  It seems unlikely...
4509   gnu-linux | gnu-kfreebsd )
4510
4511     AC_MSG_CHECKING([for signals via characters])
4512     AC_PREPROC_IFELSE([AC_LANG_PROGRAM([[
4513 #include <linux/version.h>
4514 #if LINUX_VERSION_CODE < 0x20400
4515 # error "Linux version too old"
4516 #endif
4517       ]], [[]])], emacs_signals_via_chars=yes, emacs_signals_via_chars=no)
4518
4519     AC_MSG_RESULT([$emacs_signals_via_chars])
4520     test $emacs_signals_via_chars = yes && AC_DEFINE(SIGNALS_VIA_CHARACTERS, 1)
4521     ;;
4522 esac
4523
4524
4525 AH_TEMPLATE(TAB3, [Undocumented.])
4526
4527 case $opsys in
4528   darwin) AC_DEFINE(TAB3, OXTABS) ;;
4529
4530   gnu | dragonfly | freebsd | netbsd | openbsd )
4531     AC_DEFINE(TABDLY, OXTABS, [Undocumented.])
4532     AC_DEFINE(TAB3, OXTABS)
4533     ;;
4534
4535   gnu-linux | gnu-kfreebsd )
4536     AC_PREPROC_IFELSE([AC_LANG_PROGRAM([[
4537 #ifndef __ia64__
4538 # error "not ia64"
4539 #endif
4540       ]], [[]])], AC_DEFINE(GC_MARK_SECONDARY_STACK(),
4541         [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)],
4542         [Mark a secondary stack, like the register stack on the ia64.]), [])
4543     ;;
4544
4545   hpux*)
4546     AC_DEFINE(RUN_TIME_REMAP, 1, [Define if emacs.c needs to call
4547       run_time_remap; for HPUX.])
4548     ;;
4549 esac
4550
4551
4552 dnl This won't be used automatically yet.  We also need to know, at least,
4553 dnl that the stack is continuous.
4554 AH_TEMPLATE(GC_SETJMP_WORKS, [Define if setjmp is known to save all
4555   registers relevant for conservative garbage collection in the jmp_buf.])
4556
4557
4558 case $opsys in
4559   dnl Not all the architectures are tested, but there are Debian packages
4560   dnl for SCM and/or Guile on them, so the technique must work.  See also
4561   dnl comments in alloc.c concerning setjmp and gcc.
4562   dnl Fixme: it's probably safe to just use the GCC conditional below.
4563   gnu-linux | gnu-kfreebsd )
4564     AC_PREPROC_IFELSE([AC_LANG_PROGRAM([[
4565 #if defined __i386__ || defined __sparc__ || defined __mc68000__ \
4566   || defined __alpha__ || defined __mips__ || defined __s390__ \
4567   || defined __arm__ || defined __powerpc__ || defined __amd64__ \
4568   || defined __ia64__ || defined __sh__
4569 /* ok */
4570 #else
4571 # error "setjmp not known to work on this arch"
4572 #endif
4573     ]], [[]])], AC_DEFINE(GC_SETJMP_WORKS, 1))
4574     ;;
4575 esac
4576
4577
4578 if test x$GCC = xyes; then
4579    dnl GC_SETJMP_WORKS is nearly always appropriate for GCC.
4580    AC_DEFINE(GC_SETJMP_WORKS, 1)
4581 else
4582   case $opsys in
4583     dnl irix: Tested on Irix 6.5.  SCM worked on earlier versions.
4584     aix* | dragonfly | freebsd | netbsd | openbsd | irix6-5 | sol2* )
4585       AC_DEFINE(GC_SETJMP_WORKS, 1)
4586       ;;
4587   esac
4588 fi                              dnl GCC?
4589
4590 dnl In a weird quirk, MS runtime uses _setjmp and longjmp.
4591 AC_CACHE_CHECK([for _setjmp], [emacs_cv_func__setjmp],
4592   [AC_LINK_IFELSE(
4593      [AC_LANG_PROGRAM(
4594        [[#include <setjmp.h>
4595          #ifdef __MINGW32__
4596          # define _longjmp longjmp
4597          #endif
4598        ]],
4599        [[jmp_buf j;
4600          if (! _setjmp (j))
4601            _longjmp (j, 1);]])],
4602      [emacs_cv_func__setjmp=yes],
4603      [emacs_cv_func__setjmp=no])])
4604 if test $emacs_cv_func__setjmp = yes; then
4605   AC_DEFINE([HAVE__SETJMP], 1, [Define to 1 if _setjmp and _longjmp work.])
4606 fi
4607
4608 # We need to preserve signal mask to handle C stack overflows.
4609 AC_CACHE_CHECK([for sigsetjmp], [emacs_cv_func_sigsetjmp],
4610   [AC_LINK_IFELSE(
4611      [AC_LANG_PROGRAM(
4612        [[#include <setjmp.h>
4613        ]],
4614        [[sigjmp_buf j;
4615          if (! sigsetjmp (j, 1))
4616            siglongjmp (j, 1);]])],
4617      [emacs_cv_func_sigsetjmp=yes],
4618      [emacs_cv_func_sigsetjmp=no])])
4619 if test $emacs_cv_func_sigsetjmp = yes; then
4620   AC_DEFINE([HAVE_SIGSETJMP], 1,
4621     [Define to 1 if sigsetjmp and siglongjmp work.])
4622 fi
4623
4624 case $emacs_cv_func_sigsetjmp,$emacs_cv_alternate_stack,$opsys in
4625   yes,yes,* | *,*,mingw32)
4626     AC_DEFINE([HAVE_STACK_OVERFLOW_HANDLING], 1,
4627       [Define to 1 if C stack overflow can be handled in some cases.]);;
4628 esac
4629
4630 case $opsys in
4631   sol2* | unixware )
4632     dnl TIOCGPGRP is broken in SysVr4, so we can't send signals to PTY
4633     dnl subprocesses the usual way.  But TIOCSIGNAL does work for PTYs,
4634     dnl and this is all we need.
4635     AC_DEFINE(TIOCSIGSEND, TIOCSIGNAL, [Some platforms redefine this.])
4636     ;;
4637 esac
4638
4639
4640 case $opsys in
4641   hpux* | sol2* )
4642     dnl Used in xfaces.c.
4643     AC_DEFINE(XOS_NEEDS_TIME_H, 1, [Compensate for a bug in Xos.h on
4644       some systems, where it requires time.h.])
4645     ;;
4646 esac
4647
4648
4649 dnl Define symbols to identify the version of Unix this is.
4650 dnl Define all the symbols that apply correctly.
4651 AH_TEMPLATE(DOS_NT, [Define if the system is MS DOS or MS Windows.])
4652 AH_TEMPLATE(MSDOS, [Define if the system is MS DOS.])
4653 AH_TEMPLATE(USG, [Define if the system is compatible with System III.])
4654 AH_TEMPLATE(USG5_4, [Define if the system is compatible with System V Release 4.])
4655
4656 case $opsys in
4657   aix4-2)
4658     AC_DEFINE(USG, [])
4659     dnl This symbol should be defined on AIX Version 3  ???????
4660     AC_PREPROC_IFELSE([AC_LANG_PROGRAM([[
4661 #ifndef _AIX
4662 # error "_AIX not defined"
4663 #endif
4664     ]], [[]])], [], AC_DEFINE(_AIX, [], [Define if the system is AIX.]))
4665     ;;
4666
4667   cygwin)
4668     AC_DEFINE(CYGWIN, 1, [Define if the system is Cygwin.])
4669     ;;
4670
4671   darwin)
4672     dnl Not __APPLE__, as this may not be defined on non-OSX Darwin.
4673     dnl Not DARWIN, because Panther and lower CoreFoundation.h use DARWIN to
4674     dnl distinguish OS X from pure Darwin.
4675     AC_DEFINE(DARWIN_OS, [], [Define if the system is Darwin.])
4676     ;;
4677
4678   gnu-linux | gnu-kfreebsd )
4679     AC_DEFINE(USG, [])
4680     AC_DEFINE(GNU_LINUX, [], [Define if ths system is compatible with GNU/Linux.])
4681     ;;
4682
4683   hpux*)
4684     AC_DEFINE(USG, [])
4685     AC_DEFINE(HPUX, [], [Define if the system is HPUX.])
4686     ;;
4687
4688   irix6-5)
4689     AC_DEFINE(USG, [])
4690     AC_DEFINE(USG5_4, [])
4691     AC_DEFINE(IRIX6_5, [], [Define if the system is IRIX.])
4692     ;;
4693
4694   mingw32)
4695     AC_DEFINE(DOS_NT, [])
4696     AC_DEFINE(WINDOWSNT, 1, [Define if compiling for native MS Windows.])
4697     if test "x$ac_enable_checking" != "x" ; then
4698       AC_DEFINE(EMACSDEBUG, 1, [Define to 1 to enable w32 debug facilities.])
4699     fi
4700     ;;
4701
4702   sol2*)
4703     AC_DEFINE(USG, [])
4704     AC_DEFINE(USG5_4, [])
4705     AC_DEFINE(SOLARIS2, [], [Define if the system is Solaris.])
4706     ;;
4707
4708   unixware)
4709     AC_DEFINE(USG, [])
4710     AC_DEFINE(USG5_4, [])
4711     ;;
4712 esac
4713
4714 AC_CACHE_CHECK([for usable FIONREAD], [emacs_cv_usable_FIONREAD],
4715   [case $opsys in
4716      aix4-2 | nacl)
4717        dnl BUILD 9008 - FIONREAD problem still exists in X-Windows.
4718        emacs_cv_usable_FIONREAD=no
4719        ;;
4720
4721      mingw32)
4722        emacs_cv_usable_FIONREAD=yes
4723        ;;
4724
4725      *)
4726        AC_COMPILE_IFELSE(
4727          [AC_LANG_PROGRAM([[#include <sys/types.h>
4728                             #include <sys/ioctl.h>
4729                             #ifdef USG5_4
4730                             # include <sys/filio.h>
4731                             #endif
4732                           ]],
4733                           [[int foo = ioctl (0, FIONREAD, &foo);]])],
4734          [emacs_cv_usable_FIONREAD=yes],
4735          [emacs_cv_usable_FIONREAD=no])
4736        ;;
4737    esac])
4738 if test $emacs_cv_usable_FIONREAD = yes; then
4739   AC_DEFINE([USABLE_FIONREAD], [1], [Define to 1 if FIONREAD is usable.])
4740
4741   if test $emacs_broken_SIGIO = no; then
4742     AC_CACHE_CHECK([for usable SIGIO], [emacs_cv_usable_SIGIO],
4743       [AC_COMPILE_IFELSE(
4744          [AC_LANG_PROGRAM([[#include <fcntl.h>
4745                             #include <signal.h>
4746                           ]],
4747                           [[int foo = SIGIO | F_SETFL | FASYNC;]])],
4748          [emacs_cv_usable_SIGIO=yes],
4749          [emacs_cv_usable_SIGIO=no])],
4750       [emacs_cv_usable_SIGIO=yes],
4751       [emacs_cv_usable_SIGIO=no])
4752     if test $emacs_cv_usable_SIGIO = yes; then
4753       AC_DEFINE([USABLE_SIGIO], [1], [Define to 1 if SIGIO is usable.])
4754     fi
4755   fi
4756 fi
4757
4758 case $opsys in
4759   hpux11)
4760     dnl It works to open the pty's tty in the parent (Emacs), then
4761     dnl close and reopen it in the child.
4762     AC_DEFINE(USG_SUBTTY_WORKS, 1, [Define for USG systems where it
4763       works to open a pty's tty in the parent process, then close and
4764       reopen it in the child.])
4765     ;;
4766
4767   irix6-5)
4768     AC_DEFINE(PREFER_VSUSP, 1, [Define if process_send_signal should
4769       use VSUSP instead of VSWTCH.])
4770     ;;
4771
4772   sol2-10)
4773     AC_DEFINE(_STRUCTURED_PROC, 1, [Needed for system_process_attributes
4774       on Solaris.])
4775     ;;
4776 esac
4777
4778 # Set up the CFLAGS for real compilation, so we can substitute it.
4779 CFLAGS="$REAL_CFLAGS"
4780 CPPFLAGS="$REAL_CPPFLAGS"
4781 LIBS="$REAL_LIBS"
4782
4783 ## Hack to detect a buggy GCC version.
4784 if test "$GCC" = yes && \
4785    $CC --version 2> /dev/null | grep 'gcc.* 4.5.0' >/dev/null; then
4786   case $CFLAGS in
4787     *-fno-optimize-sibling-calls*) ;;
4788     *-O@<:@23@:>@*)
4789       AC_MSG_ERROR([GCC 4.5.0 has problems compiling Emacs; see etc/PROBLEMS.]);;
4790   esac
4791 fi
4792
4793 version=$PACKAGE_VERSION
4794
4795 copyright="Copyright (C) 2015 Free Software Foundation, Inc."
4796 AC_DEFINE_UNQUOTED(COPYRIGHT, ["$copyright"],
4797   [Short copyright string for this version of Emacs.])
4798 AC_SUBST(copyright)
4799
4800 ### Specify what sort of things we'll be editing into Makefile and config.h.
4801 ### Use configuration here uncanonicalized to avoid exceeding size limits.
4802 AC_SUBST(version)
4803 AC_SUBST(configuration)
4804 ## Unused?
4805 AC_SUBST(canonical)
4806 AC_SUBST(srcdir)
4807 AC_SUBST(prefix)
4808 AC_SUBST(exec_prefix)
4809 AC_SUBST(bindir)
4810 AC_SUBST(datadir)
4811 AC_SUBST(sharedstatedir)
4812 AC_SUBST(libexecdir)
4813 AC_SUBST(mandir)
4814 AC_SUBST(infodir)
4815 AC_SUBST(lispdir)
4816 AC_SUBST(standardlisppath)
4817 AC_SUBST(locallisppath)
4818 AC_SUBST(lisppath)
4819 AC_SUBST(x_default_search_path)
4820 AC_SUBST(etcdir)
4821 AC_SUBST(archlibdir)
4822 AC_SUBST(etcdocdir)
4823 AC_SUBST(bitmapdir)
4824 AC_SUBST(gamedir)
4825 AC_SUBST(gameuser)
4826 AC_SUBST(gamegroup)
4827 ## FIXME? Nothing uses @LD_SWITCH_X_SITE@.
4828 ## src/Makefile.in did add LD_SWITCH_X_SITE (as a cpp define) to the
4829 ## end of LIBX_BASE, but nothing ever set it.
4830 AC_SUBST(LD_SWITCH_X_SITE)
4831 AC_SUBST(C_SWITCH_X_SITE)
4832 AC_SUBST(GNUSTEP_CFLAGS)
4833 AC_SUBST(CFLAGS)
4834 ## Used in lwlib/Makefile.in.
4835 AC_SUBST(X_TOOLKIT_TYPE)
4836 AC_SUBST(ns_appdir)
4837 AC_SUBST(ns_appbindir)
4838 AC_SUBST(ns_appresdir)
4839 AC_SUBST(ns_appsrc)
4840 AC_SUBST(GNU_OBJC_CFLAGS)
4841 AC_SUBST(OTHER_FILES)
4842
4843 if test -n "${term_header}"; then
4844     AC_DEFINE_UNQUOTED(TERM_HEADER, "${term_header}",
4845         [Define to the header for the built-in window system.])
4846 fi
4847
4848 AC_DEFINE_UNQUOTED(EMACS_CONFIGURATION,  "${canonical}",
4849                    [Define to the canonical Emacs configuration name.])
4850 AC_DEFINE_UNQUOTED(EMACS_CONFIG_OPTIONS, "${emacs_config_options}",
4851                    [Define to the options passed to configure.])
4852 AH_TEMPLATE(config_opsysfile, [Some platforms that do not use configure
4853   define this to include extra configuration information.])
4854
4855 case $opsys in
4856   mingw32)
4857     AC_DEFINE(config_opsysfile, <ms-w32.h>, [])
4858     ;;
4859 esac
4860
4861 XMENU_OBJ=
4862 XOBJ=
4863 FONT_OBJ=
4864 if test "${HAVE_X_WINDOWS}" = "yes" ; then
4865   AC_DEFINE(HAVE_X_WINDOWS, 1,
4866             [Define to 1 if you want to use the X window system.])
4867   XMENU_OBJ=xmenu.o
4868   XOBJ="xterm.o xfns.o xselect.o xrdb.o xsmfns.o xsettings.o"
4869   FONT_OBJ=xfont.o
4870   if test "$USE_CAIRO" = "yes"; then
4871     FONT_OBJ="ftfont.o ftcrfont.o"
4872   elif test "$HAVE_XFT" = "yes"; then
4873     FONT_OBJ="$FONT_OBJ ftfont.o xftfont.o ftxfont.o"
4874   elif test "$HAVE_FREETYPE" = "yes"; then
4875     FONT_OBJ="$FONT_OBJ ftfont.o ftxfont.o"
4876   fi
4877   AC_SUBST(FONT_OBJ)
4878 fi
4879 AC_SUBST(XMENU_OBJ)
4880 AC_SUBST(XOBJ)
4881 AC_SUBST(FONT_OBJ)
4882
4883 WIDGET_OBJ=
4884 MOTIF_LIBW=
4885 if test "${USE_X_TOOLKIT}" != "none" ; then
4886   WIDGET_OBJ=widget.o
4887   AC_DEFINE(USE_X_TOOLKIT, 1, [Define to 1 if using an X toolkit.])
4888   if test "${USE_X_TOOLKIT}" = "LUCID"; then
4889     AC_DEFINE(USE_LUCID, 1, [Define to 1 if using the Lucid X toolkit.])
4890   elif test "${USE_X_TOOLKIT}" = "MOTIF"; then
4891     AC_DEFINE(USE_MOTIF, 1, [Define to 1 if using the Motif X toolkit.])
4892     MOTIF_LIBW=-lXm
4893     case "$opsys" in
4894       gnu-linux)
4895         ## Paul Abrahams <abrahams at equinox.shaysnet.com> says this is needed.
4896         MOTIF_LIBW="$MOTIF_LIBW -lXpm"
4897         ;;
4898
4899       unixware)
4900         ## Richard Anthony Ryan <ryanr at ellingtn.ftc.nrcs.usda.gov>
4901         ## says -lXimp is needed in UNIX_SV ... 4.2 1.1.2.
4902         MOTIF_LIBW="MOTIF_LIBW -lXimp"
4903         ;;
4904
4905       aix4-2)
4906         ## olson@mcs.anl.gov says -li18n is needed by -lXm.
4907         MOTIF_LIBW="$MOTIF_LIBW -li18n"
4908         ;;
4909     esac
4910     MOTIF_LIBW="$MOTIF_LIBW $LIBXP"
4911   fi
4912 fi
4913 AC_SUBST(WIDGET_OBJ)
4914
4915 TOOLKIT_LIBW=
4916 case "$USE_X_TOOLKIT" in
4917   MOTIF) TOOLKIT_LIBW="$MOTIF_LIBW" ;;
4918   LUCID) TOOLKIT_LIBW="$LUCID_LIBW" ;;
4919   none) test "x$HAVE_GTK" = "xyes" && TOOLKIT_LIBW="$GTK_LIBS" ;;
4920 esac
4921 AC_SUBST(TOOLKIT_LIBW)
4922
4923 if test "${opsys}" != "mingw32"; then
4924   if test "$USE_X_TOOLKIT" = "none"; then
4925     LIBXT_OTHER="\$(LIBXSM)"
4926   else
4927     LIBXT_OTHER="\$(LIBXMU) -lXt \$(LIBXTR6) -lXext"
4928   fi
4929 fi
4930 AC_SUBST(LIBXT_OTHER)
4931
4932 if test "${HAVE_X11}" = "yes" ; then
4933   AC_DEFINE(HAVE_X11, 1,
4934             [Define to 1 if you want to use version 11 of X windows.])
4935   LIBX_OTHER="\$(LIBXT) \$(LIBX_EXTRA)"
4936 else
4937   LIBX_OTHER=
4938 fi
4939 AC_SUBST(LIBX_OTHER)
4940
4941 if test "$HAVE_GTK" = yes || test "$HAVE_X11" != yes; then
4942   LIBXMENU=
4943 elif test "$USE_X_TOOLKIT" = none; then
4944   LIBXMENU='$(oldXMenudir)/libXMenu11.a'
4945 else
4946   LIBXMENU='$(lwlibdir)/liblw.a'
4947 fi
4948 AC_SUBST(LIBXMENU)
4949
4950 AC_CACHE_CHECK([for struct alignment],
4951   [emacs_cv_struct_alignment],
4952   [AC_COMPILE_IFELSE(
4953      [AC_LANG_PROGRAM([[#include <stddef.h>
4954                         struct __attribute__ ((aligned (8))) s { char c; };
4955                         struct t { char c; struct s s; };
4956                         char verify[offsetof (struct t, s) == 8 ? 1 : -1];
4957                       ]])],
4958      [emacs_cv_struct_alignment=yes],
4959      [emacs_cv_struct_alignment=no])])
4960 if test "$emacs_cv_struct_alignment" = yes; then
4961   AC_DEFINE([HAVE_STRUCT_ATTRIBUTE_ALIGNED], 1,
4962     [Define to 1 if 'struct __attribute__ ((aligned (N)))' aligns the
4963      structure to an N-byte boundary.])
4964 fi
4965
4966 if test "${GNU_MALLOC}" = "yes" ; then
4967   AC_DEFINE(GNU_MALLOC, 1,
4968             [Define to 1 if you want to use the GNU memory allocator.])
4969 fi
4970
4971 RALLOC_OBJ=
4972 if test "${REL_ALLOC}" = "yes" ; then
4973   AC_DEFINE(REL_ALLOC, 1,
4974             [Define REL_ALLOC if you want to use the relocating allocator for
4975              buffer space.])
4976
4977   test "$system_malloc" != "yes" && RALLOC_OBJ=ralloc.o
4978 fi
4979 AC_SUBST(RALLOC_OBJ)
4980
4981 if test "$opsys" = "cygwin"; then
4982   CYGWIN_OBJ="sheap.o cygw32.o"
4983   ## Cygwin differs because of its unexec().
4984   PRE_ALLOC_OBJ=
4985   POST_ALLOC_OBJ=lastfile.o
4986 elif test "$opsys" = "mingw32"; then
4987   CYGWIN_OBJ=
4988   PRE_ALLOC_OBJ=
4989   POST_ALLOC_OBJ=lastfile.o
4990 else
4991   CYGWIN_OBJ=
4992   PRE_ALLOC_OBJ=lastfile.o
4993   POST_ALLOC_OBJ=
4994 fi
4995 AC_SUBST(CYGWIN_OBJ)
4996 AC_SUBST(PRE_ALLOC_OBJ)
4997 AC_SUBST(POST_ALLOC_OBJ)
4998
4999 dnl Call this 'FORTIFY_SOUR' so that it sorts before the 'FORTIFY_SOURCE'
5000 dnl verbatim defined above.  The tricky name is apropos, as this hack
5001 dnl makes Fortify go sour!
5002 AH_VERBATIM([FORTIFY_SOUR],
5003 [/* Without the following workaround, Emacs runs slowly on OS X 10.8.
5004    The workaround disables some useful run-time checking, so it
5005    should be conditional to the platforms with the performance bug.
5006    Perhaps Apple will fix this some day; also see m4/extern-inline.m4.  */
5007 #if defined __APPLE__ && defined __GNUC__
5008 # ifndef _DONT_USE_CTYPE_INLINE_
5009 #  define _DONT_USE_CTYPE_INLINE_
5010 # endif
5011 # ifndef _FORTIFY_SOURCE
5012 #  define _FORTIFY_SOURCE 0
5013 # endif
5014 #endif
5015 ])
5016
5017 # If user asks to omit features, disable optional features that gnulib
5018 # might otherwise enable.
5019 if test "$with_features" = no && test "$enable_acl" != yes; then
5020   enable_acl=no
5021 fi
5022
5023 # Configure gnulib.  Although this does not affect CFLAGS or LIBS permanently.
5024 # it temporarily reverts them to their pre-pkg-config values,
5025 # because gnulib needs to work with both src (which uses the
5026 # pkg-config stuff) and lib-src (which does not).  For example, gnulib
5027 # may need to determine whether LIB_CLOCK_GETTIME should contain -lrt,
5028 # and it therefore needs to run in an environment where LIBS does not
5029 # already contain -lrt merely because 'pkg-config --libs' printed '-lrt'
5030 # for some package unrelated to lib-src.
5031 SAVE_CFLAGS=$CFLAGS
5032 SAVE_LIBS=$LIBS
5033 CFLAGS=$pre_PKG_CONFIG_CFLAGS
5034 LIBS="$LIB_PTHREAD $pre_PKG_CONFIG_LIBS"
5035 gl_ASSERT_NO_GNULIB_POSIXCHECK
5036 gl_ASSERT_NO_GNULIB_TESTS
5037 gl_INIT
5038 CFLAGS=$SAVE_CFLAGS
5039 LIBS=$SAVE_LIBS
5040
5041 if test "${opsys}" = "mingw32"; then
5042   CPPFLAGS="$CPPFLAGS -DUSE_CRT_DLL=1 -I \${abs_top_srcdir}/nt/inc"
5043   # Remove unneeded switches from the value of CC that goes to Makefiles
5044   CC=`AS_ECHO(["$CC"]) | sed -e "s,$GCC_TEST_OPTIONS,,"`
5045 fi
5046
5047 case "$opsys" in
5048   aix4-2) LD_SWITCH_SYSTEM_TEMACS="-Wl,-bnodelcsect" ;;
5049
5050   cygwin) LD_SWITCH_SYSTEM_TEMACS="-Wl,-stack,0x00800000" ;;
5051
5052   darwin)
5053    ## The -headerpad option tells ld (see man page) to leave room at the
5054    ## end of the header for adding load commands.  Needed for dumping.
5055    ## 0x1000 is enough for roughly 52 load commands on the x86_64
5056    ## architecture (where they are 78 bytes each). The actual number of
5057    ## load commands added is not consistent but normally ranges from
5058    ## about 14 to about 34. Setting it high gets us plenty of slop and
5059    ## only costs about 1.5K of wasted binary space.
5060    headerpad_extra=1000
5061    if test "$HAVE_NS" = "yes"; then
5062      libs_nsgui="-framework AppKit"
5063      if test "$NS_IMPL_COCOA" = "yes"; then
5064         libs_nsgui="$libs_nsgui -framework IOKit"
5065      fi
5066    else
5067      libs_nsgui=
5068    fi
5069    LD_SWITCH_SYSTEM_TEMACS="-fno-pie -prebind $libs_nsgui -Xlinker -headerpad -Xlinker $headerpad_extra"
5070
5071    ## This is here because src/Makefile.in did some extra fiddling around
5072    ## with LD_SWITCH_SYSTEM.  It seems cleaner to put this in
5073    ## LD_SWITCH_SYSTEM_TEMACS instead,
5074    test "x$LD_SWITCH_SYSTEM" = "x" && test "x$GCC" != "xyes" && \
5075      LD_SWITCH_SYSTEM_TEMACS="-X $LD_SWITCH_SYSTEM_TEMACS"
5076    ;;
5077
5078   ## LD_SWITCH_X_SITE_RPATH is a -rpath option saying where to
5079   ## find X at run-time.
5080   ## When handled by cpp, this was in LD_SWITCH_SYSTEM.  However, at the
5081   ## point where configure sourced the s/*.h file, LD_SWITCH_X_SITE_RPATH
5082   ## had not yet been defined and was expanded to null.  Hence LD_SWITCH_SYSTEM
5083   ## had different values in configure (in ac_link) and src/Makefile.in.
5084   ## It seems clearer therefore to put this piece in LD_SWITCH_SYSTEM_TEMACS.
5085   gnu*) LD_SWITCH_SYSTEM_TEMACS="\$(LD_SWITCH_X_SITE_RPATH)" ;;
5086
5087   mingw32)
5088    ## Is it any better under MinGW64 to relocate emacs into higher addresses?
5089    case "$canonical" in
5090      x86_64-*-*) LD_SWITCH_SYSTEM_TEMACS="-Wl,-stack,0x00800000 -Wl,-heap,0x00100000 -Wl,-image-base,0x400000000 -Wl,-entry,__start -Wl,-Map,./temacs.map" ;;
5091      *) LD_SWITCH_SYSTEM_TEMACS="-Wl,-stack,0x00800000 -Wl,-heap,0x00100000 -Wl,-image-base,0x01000000 -Wl,-entry,__start -Wl,-Map,./temacs.map" ;;
5092    esac
5093    ;;
5094
5095   *) LD_SWITCH_SYSTEM_TEMACS= ;;
5096 esac
5097
5098 # -nopie fixes a temacs segfault on Gentoo, OpenBSD, and other systems
5099 # with "hardened" GCC configurations for some reason (Bug#18784).
5100 # We don't know why -nopie works, but not segfaulting is better than
5101 # segfaulting.  Use ac_c_werror_flag=yes when trying -nopie, otherwise
5102 # clang keeps warning that it does not understand -nopie, and pre-4.6
5103 # GCC has a similar problem (Bug#20338).
5104 AC_CACHE_CHECK([whether $CC accepts -nopie],
5105   [emacs_cv_prog_cc_nopie],
5106   [emacs_save_c_werror_flag=$ac_c_werror_flag
5107    emacs_save_LDFLAGS=$LDFLAGS
5108    ac_c_werror_flag=yes
5109    LDFLAGS="$LDFLAGS -nopie"
5110    AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])],
5111      [emacs_cv_prog_cc_nopie=yes],
5112      [emacs_cv_prog_cc_nopie=no])
5113    ac_c_werror_flag=$emacs_save_c_werror_flag
5114    LDFLAGS=$emacs_save_LDFLAGS])
5115 if test "$emacs_cv_prog_cc_nopie" = yes; then
5116   LD_SWITCH_SYSTEM_TEMACS="$LD_SWITCH_SYSTEM_TEMACS -nopie"
5117 fi
5118
5119 if test x$ac_enable_profiling != x ; then
5120   case $opsys in
5121     *freebsd | gnu-linux) ;;
5122     *) LD_SWITCH_SYSTEM_TEMACS="$LD_SWITCH_SYSTEM_TEMACS -pg" ;;
5123   esac
5124 fi
5125
5126 LD_SWITCH_SYSTEM_TEMACS="$LDFLAGS_NOCOMBRELOC $LD_SWITCH_SYSTEM_TEMACS"
5127
5128 AC_SUBST(LD_SWITCH_SYSTEM_TEMACS)
5129
5130 ## Common for all window systems
5131 if test "$window_system" != "none"; then
5132   AC_DEFINE(HAVE_WINDOW_SYSTEM, 1, [Define if you have a window system.])
5133   AC_DEFINE(POLL_FOR_INPUT, 1, [Define if you poll periodically to detect C-g.])
5134   WINDOW_SYSTEM_OBJ="fontset.o fringe.o image.o"
5135 fi
5136
5137 AC_SUBST(WINDOW_SYSTEM_OBJ)
5138
5139 AH_TOP([/* GNU Emacs site configuration template file.
5140
5141 Copyright (C) 1988, 1993-1994, 1999-2002, 2004-2015
5142   Free Software Foundation, Inc.
5143
5144 This file is part of GNU Emacs.
5145
5146 GNU Emacs is free software: you can redistribute it and/or modify
5147 it under the terms of the GNU General Public License as published by
5148 the Free Software Foundation, either version 3 of the License, or
5149 (at your option) any later version.
5150
5151 GNU Emacs is distributed in the hope that it will be useful,
5152 but WITHOUT ANY WARRANTY; without even the implied warranty of
5153 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
5154 GNU General Public License for more details.
5155
5156 You should have received a copy of the GNU General Public License
5157 along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
5158
5159
5160 /* No code in Emacs #includes config.h twice, but some bits of code
5161    intended to work with other packages as well (like gmalloc.c)
5162    think they can include it as many times as they like.  */
5163 #ifndef EMACS_CONFIG_H
5164 #define EMACS_CONFIG_H
5165 ])dnl
5166
5167 AH_BOTTOM([#include <conf_post.h>
5168
5169 #endif /* EMACS_CONFIG_H */
5170
5171 /*
5172 Local Variables:
5173 mode: c
5174 End:
5175 */
5176 ])dnl
5177
5178 #### Report on what we decided to do.
5179 #### Report GTK as a toolkit, even if it doesn't use Xt.
5180 #### It makes printing result more understandable as using GTK sets
5181 #### toolkit_scroll_bars to yes by default.
5182 if test "${HAVE_GTK}" = "yes"; then
5183   USE_X_TOOLKIT="$USE_GTK_TOOLKIT"
5184 fi
5185
5186 if test $USE_ACL -ne 0; then
5187   ACL_SUMMARY="yes $LIB_ACL"
5188 else
5189   ACL_SUMMARY=no
5190 fi
5191
5192 emacs_standard_dirs='Standard dirs'
5193 AS_ECHO(["
5194 Configured for '${canonical}'.
5195
5196   Where should the build process find the source code?    ${srcdir}
5197   What compiler should emacs be built with?               ${CC} ${CFLAGS}
5198   Should Emacs use the GNU version of malloc?             ${GNU_MALLOC}${GNU_MALLOC_reason}
5199   Should Emacs use a relocating allocator for buffers?    ${REL_ALLOC}
5200   Should Emacs use mmap(2) for buffer allocation?         $use_mmap_for_buffers
5201   What window system should Emacs use?                    ${window_system}
5202   What toolkit should Emacs use?                          ${USE_X_TOOLKIT}
5203   Where do we find X Windows header files?                ${x_includes:-$emacs_standard_dirs}
5204   Where do we find X Windows libraries?                   ${x_libraries:-$emacs_standard_dirs}"])
5205
5206 optsep=
5207 emacs_config_features=
5208 for opt in XAW3D XPM JPEG TIFF GIF PNG RSVG CAIRO IMAGEMAGICK SOUND GPM DBUS \
5209   GCONF GSETTINGS NOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE M17N_FLT \
5210   LIBOTF XFT ZLIB TOOLKIT_SCROLL_BARS X_TOOLKIT X11 NS MODULES; do
5211
5212     case $opt in
5213       NOTIFY|ACL) eval val=\${${opt}_SUMMARY} ;;
5214       CAIRO|TOOLKIT_SCROLL_BARS|X_TOOLKIT) eval val=\${USE_$opt} ;;
5215       *) eval val=\${HAVE_$opt} ;;
5216     esac
5217     case x$val in
5218       xno|xnone|x) continue ;;
5219     esac
5220     case $opt in
5221       X_TOOLKIT)
5222         case $val in
5223           GTK*|LUCID|MOTIF) opt=$val ;;
5224           *) continue ;;
5225         esac
5226       ;;
5227     esac
5228     AS_VAR_APPEND([emacs_config_features], ["$optsep$opt"])
5229     optsep=' '
5230 done
5231 AC_DEFINE_UNQUOTED(EMACS_CONFIG_FEATURES, "${emacs_config_features}",
5232   [Summary of some of the main features enabled by configure.])
5233
5234 AS_ECHO(["  Does Emacs use -lXaw3d?                                 ${HAVE_XAW3D}
5235   Does Emacs use -lXpm?                                   ${HAVE_XPM}
5236   Does Emacs use -ljpeg?                                  ${HAVE_JPEG}
5237   Does Emacs use -ltiff?                                  ${HAVE_TIFF}
5238   Does Emacs use a gif library?                           ${HAVE_GIF} $LIBGIF
5239   Does Emacs use a png library?                           ${HAVE_PNG} $LIBPNG
5240   Does Emacs use -lrsvg-2?                                ${HAVE_RSVG}
5241   Does Emacs use cairo?                                   ${USE_CAIRO}
5242   Does Emacs use imagemagick?                             ${HAVE_IMAGEMAGICK}
5243   Does Emacs support sound?                               ${HAVE_SOUND}
5244   Does Emacs use -lgpm?                                   ${HAVE_GPM}
5245   Does Emacs use -ldbus?                                  ${HAVE_DBUS}
5246   Does Emacs use -lgconf?                                 ${HAVE_GCONF}
5247   Does Emacs use GSettings?                               ${HAVE_GSETTINGS}
5248   Does Emacs use a file notification library?             ${NOTIFY_SUMMARY}
5249   Does Emacs use access control lists?                    ${ACL_SUMMARY}
5250   Does Emacs use -lselinux?                               ${HAVE_LIBSELINUX}
5251   Does Emacs use -lgnutls?                                ${HAVE_GNUTLS}
5252   Does Emacs use -lxml2?                                  ${HAVE_LIBXML2}
5253   Does Emacs use -lfreetype?                              ${HAVE_FREETYPE}
5254   Does Emacs use -lm17n-flt?                              ${HAVE_M17N_FLT}
5255   Does Emacs use -lotf?                                   ${HAVE_LIBOTF}
5256   Does Emacs use -lxft?                                   ${HAVE_XFT}
5257   Does Emacs directly use zlib?                           ${HAVE_ZLIB}
5258   Does Emacs have dynamic modules support?                ${HAVE_MODULES}
5259   Does Emacs use toolkit scroll bars?                     ${USE_TOOLKIT_SCROLL_BARS}
5260 "])
5261
5262 if test -n "${EMACSDATA}"; then
5263    AS_ECHO(["  Environment variable EMACSDATA set to:                  $EMACSDATA"])
5264 fi
5265 if test -n "${EMACSDOC}"; then
5266    AS_ECHO(["  Environment variable EMACSDOC set to:                   $EMACSDOC"])
5267 fi
5268
5269 echo
5270
5271 if test "$HAVE_NS" = "yes"; then
5272    echo
5273    AS_ECHO(["You must run \"${MAKE-make} install\" in order to test the built application.
5274 The installed application will go to nextstep/Emacs.app and can be
5275 run or moved from there."])
5276    if test "$EN_NS_SELF_CONTAINED" = "yes"; then
5277       echo "The application will be fully self-contained."
5278     else
5279       AS_ECHO(["The lisp resources for the application will be installed under ${prefix}.
5280 You may need to run \"${MAKE-make} install\" with sudo.  The application will fail
5281 to run if these resources are not installed."])
5282    fi
5283    echo
5284 fi
5285
5286 if test "${opsys}" = "cygwin"; then
5287   case `uname -r` in
5288     1.5.*) AC_MSG_WARN([[building Emacs on Cygwin 1.5 is not supported.]])
5289            echo
5290            ;;
5291   esac
5292 fi
5293
5294 # Remove any trailing slashes in these variables.
5295 case $prefix in
5296   */) prefix=`AS_DIRNAME(["$prefix."])`;;
5297 esac
5298 case $exec_prefix in
5299   */) exec_prefix=`AS_DIRNAME(["$exec_prefix."])`;;
5300 esac
5301
5302 if test "$HAVE_NS" = "yes"; then
5303   if test "$NS_IMPL_GNUSTEP" = yes; then
5304     AC_CONFIG_FILES([nextstep/GNUstep/Emacs.base/Resources/Info-gnustep.plist:nextstep/templates/Info-gnustep.plist.in \
5305       nextstep/GNUstep/Emacs.base/Resources/Emacs.desktop:nextstep/templates/Emacs.desktop.in])
5306     ns_check_file=Resources/Info-gnustep.plist
5307   else
5308     AC_CONFIG_FILES([nextstep/Cocoa/Emacs.base/Contents/Info.plist:nextstep/templates/Info.plist.in \
5309       nextstep/Cocoa/Emacs.base/Contents/Resources/English.lproj/InfoPlist.strings:nextstep/templates/InfoPlist.strings.in])
5310     ns_check_file=Contents/Info.plist
5311   fi
5312   AC_SUBST(ns_check_file)
5313 fi
5314
5315 dnl config.status treats $srcdir specially, so I think this is ok...
5316 AC_CONFIG_FILES([$srcdir/doc/man/emacs.1])
5317
5318 dnl Obviously there is duplication here wrt $SUBDIR_MAKEFILES.
5319 dnl You _can_ use that variable in AC_CONFIG_FILES, so long as any directory
5320 dnl using automake (ie lib/) is explicitly listed and not "hidden" in a variable
5321 dnl (else you get "no 'Makefile.am' found for any configure output").
5322 dnl This will work, but you get a config.status that is not quite right
5323 dnl (see http://lists.gnu.org/archive/html/bug-autoconf/2008-08/msg00028.html).
5324 dnl That doesn't have any obvious consequences for Emacs, but on the whole
5325 dnl it seems better to just live with the duplication.
5326 SUBDIR_MAKEFILES="lib/Makefile lib-src/Makefile oldXMenu/Makefile doc/emacs/Makefile doc/misc/Makefile doc/lispintro/Makefile doc/lispref/Makefile src/Makefile lwlib/Makefile lisp/Makefile leim/Makefile nextstep/Makefile nt/Makefile"
5327
5328 AC_CONFIG_FILES([Makefile lib/Makefile lib-src/Makefile oldXMenu/Makefile \
5329        doc/emacs/Makefile doc/misc/Makefile doc/lispintro/Makefile \
5330        doc/lispref/Makefile src/Makefile lwlib/Makefile lisp/Makefile \
5331        leim/Makefile nextstep/Makefile nt/Makefile])
5332
5333 dnl test/ is not present in release tarfiles.
5334 opt_makefile=test/automated/Makefile
5335
5336 if test -f "$srcdir/$opt_makefile.in"; then
5337   SUBDIR_MAKEFILES="$SUBDIR_MAKEFILES $opt_makefile"
5338   dnl Again, it's best not to use a variable.  Though you can add
5339   dnl ", [], [opt_makefile='$opt_makefile']" and it should work.
5340   AC_CONFIG_FILES([test/automated/Makefile])
5341 fi
5342
5343
5344 dnl The admin/ directory used to be excluded from tarfiles.
5345 if test -d $srcdir/admin; then
5346   SUBDIR_MAKEFILES="$SUBDIR_MAKEFILES admin/charsets/Makefile admin/unidata/Makefile admin/grammars/Makefile"
5347   AC_CONFIG_FILES([admin/charsets/Makefile])
5348   AC_CONFIG_FILES([admin/unidata/Makefile])
5349   AC_CONFIG_FILES([admin/grammars/Makefile])
5350 fi                              dnl -d admin
5351
5352
5353 SUBDIR_MAKEFILES_IN=`echo " ${SUBDIR_MAKEFILES}" | sed -e 's| | $(srcdir)/|g' -e 's|Makefile|Makefile.in|g'`
5354
5355 AC_SUBST(SUBDIR_MAKEFILES_IN)
5356
5357 dnl You might wonder (I did) why epaths.h is generated by running make,
5358 dnl rather than just letting configure generate it from epaths.in.
5359 dnl One reason is that the various paths are not fully expanded (see above);
5360 dnl eg gamedir=${prefix}/var/games/emacs.
5361 dnl Secondly, the GNU Coding standards require that one should be able
5362 dnl to run 'make prefix=/some/where/else' and override the values set
5363 dnl by configure.  This also explains the 'move-if-change' test and
5364 dnl the use of force in the 'epaths-force' rule in Makefile.in.
5365 AC_CONFIG_COMMANDS([src/epaths.h], [
5366 if test "${opsys}" = "mingw32"; then
5367   ${MAKE-make} MAKEFILE_NAME=do-not-make-Makefile epaths-force-w32
5368 else
5369   ${MAKE-make} MAKEFILE_NAME=do-not-make-Makefile epaths-force
5370 fi || AC_MSG_ERROR(['src/epaths.h' could not be made.])
5371 ], [GCC="$GCC" CPPFLAGS="$CPPFLAGS" opsys="$opsys"])
5372
5373 dnl NB we have to cheat and use the ac_... version because abs_top_srcdir
5374 dnl is not yet set, sigh.  Or we could use ../$srcdir/src/.gdbinit,
5375 dnl or a symlink?
5376 AC_CONFIG_COMMANDS([src/.gdbinit], [
5377 if test ! -f src/.gdbinit && test -f "$srcdir/src/.gdbinit"; then
5378   AS_ECHO(["source $ac_abs_top_srcdir/src/.gdbinit"]) > src/.gdbinit
5379 fi
5380 ])
5381
5382 dnl Perhaps this would be better named doc-emacs-emacsver.texi?
5383 dnl See comments for etc-refcards-emacsver.tex.
5384 dnl Since we get a doc/emacs directory generated anyway, for the Makefile,
5385 dnl it is not quite the same.  But we are generating in $srcdir.
5386 AC_CONFIG_COMMANDS([doc/emacs/emacsver.texi], [
5387 ${MAKE-make} -s --no-print-directory -C doc/emacs doc-emacsver || \
5388 AC_MSG_ERROR(['doc/emacs/emacsver.texi' could not be made.])
5389 ])
5390
5391 dnl If we give this the more natural name, etc/refcards/emacsver.texi,
5392 dnl then a directory etc/refcards is created in the build directory,
5393 dnl which is probably harmless, but confusing (in out-of-tree builds).
5394 dnl (If we were to generate etc/refcards/Makefile, this might change.)
5395 dnl It is really $srcdir/etc/refcards/emacsver.tex that we generate.
5396 AC_CONFIG_COMMANDS([etc-refcards-emacsver.tex], [
5397 ${MAKE-make} -s MAKEFILE_NAME=do-not-make-Makefile etc-emacsver || \
5398 AC_MSG_ERROR(['etc/refcards/emacsver.tex' could not be made.])
5399 ])
5400
5401 AC_OUTPUT
5402
5403 test "$MAKE" = make || AC_MSG_NOTICE([Now you can run '$MAKE'.])