configure.ac 174 KB
Newer Older
1 2 3 4 5 6
dnl  Autoconf script for GNU Emacs
dnl To rebuild the `configure' script from this, execute the command
dnl 	autoconf
dnl in the directory containing this script.
dnl If you changed any AC_DEFINES, also run autoheader.
dnl
7
dnl Copyright (C) 1994-1996, 1999-2014 Free Software Foundation, Inc.
8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
dnl
dnl  This file is part of GNU Emacs.
dnl
dnl  GNU Emacs is free software: you can redistribute it and/or modify
dnl  it under the terms of the GNU General Public License as published by
dnl  the Free Software Foundation, either version 3 of the License, or
dnl  (at your option) any later version.
dnl
dnl  GNU Emacs is distributed in the hope that it will be useful,
dnl  but WITHOUT ANY WARRANTY; without even the implied warranty of
dnl  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
dnl  GNU General Public License for more details.
dnl
dnl  You should have received a copy of the GNU General Public License
dnl  along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.

AC_PREREQ(2.65)
Glenn Morris's avatar
Glenn Morris committed
25
dnl Note this is parsed by (at least) make-dist and lisp/cedet/ede/emacs.el.
Glenn Morris's avatar
Glenn Morris committed
26
AC_INIT(GNU Emacs, 24.4.50, bug-gnu-emacs@gnu.org)
27

28 29 30 31 32 33
dnl Set emacs_config_options to the options of 'configure', quoted for the shell,
dnl and then quoted again for a C string.  Separate options with spaces.
dnl Add some environment variables, if they were passed via the environment
dnl rather than on the command-line.
emacs_config_options=
optsep=
34 35
dnl This is the documented way to record the args passed to configure,
dnl rather than $ac_configure_args.
36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64
for opt in ${1+"$@"} CFLAGS CPPFLAGS LDFLAGS; do
  case $opt in
    -n | --no-create | --no-recursion)
      continue ;;
    CFLAGS | CPPFLAGS | LDFLAGS)
      eval 'test "${'$opt'+set}" = set' || continue
      case " $*" in
	*" $opt="*) continue ;;
      esac
      eval opt=$opt=\$$opt ;;
  esac

  emacs_shell_specials=$IFS\''"#$&()*;<>?@<:@\\`{|~'
  case $opt in
    *[["$emacs_shell_specials"]]*)
      case $opt in
	*\'*)
	  emacs_quote_apostrophes="s/'/'\\\\''/g"
	  opt=`AS_ECHO(["$opt"]) | sed "$emacs_quote_apostrophes"` ;;
      esac
      opt="'$opt'"
      case $opt in
	*[['"\\']]*)
	  emacs_quote_for_c='s/[["\\]]/\\&/g; $!s/$/\\n\\/'
	  opt=`AS_ECHO(["$opt"]) | sed "$emacs_quote_for_c"` ;;
      esac ;;
  esac
  AS_VAR_APPEND([emacs_config_options], ["$optsep$opt"])
  optsep=' '
65 66
done

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.
Glenn Morris's avatar
Glenn Morris committed
71
dnl With older versions this is a no-op.
72
AC_CONFIG_MACRO_DIR(m4)
73 74 75 76

xcsdkdir=
AC_CHECK_PROGS(XCRUN, [xcrun])
if test -n "$XCRUN"; then
77 78
  if test -z "$MAKE"; then
    dnl Call the variable MAKE_PROG, not MAKE, to avoid confusion with
79
    dnl the usual MAKE variable that 'make' itself uses.
80 81 82 83
    AC_CHECK_PROG([MAKE_PROG], [make], [yes])
    if test -z "$MAKE_PROG"; then
      MAKE="$XCRUN MAKE"
      export MAKE
84
      xcsdkdir=`$XCRUN --show-sdk-path 2>/dev/null`
85 86
    fi
  fi
87 88
fi

89 90 91 92 93 94 95
dnl GNU Make is required, so don't test for its individual features.
am_cv_make_support_nested_variables=yes
AC_DEFUN([AC_PROG_MAKE_SET],
  [SET_MAKE=
   AC_SUBST([SET_MAKE])])

dnl Check for GNU Make and possibly set MAKE before running AM_INIT_AUTOMAKE.
96 97 98 99 100 101 102 103 104
[emacs_check_gnu_make ()
{
  emacs_makeout=`($1 --version) 2>/dev/null` &&
  case $emacs_makeout in
    'GNU Make '3.8[1-9]* | 'GNU Make '3.9[0-9]* | \
    'GNU Make '3.[1-9][0-9][0-9]* | 'GNU Make '[4-9]* | 'GNU Make '[1-9][0-9]* )
       ac_path_MAKE_found=:;;
  esac
}]
105 106 107
AC_CACHE_CHECK([for GNU Make], [ac_cv_path_MAKE],
  [ac_path_MAKE_found=false
   if test -n "$MAKE"; then
108
     emacs_check_gnu_make "$MAKE"
109 110 111 112 113 114
     ac_cv_path_MAKE=$MAKE
   else
     emacs_tried_make=false
     emacs_tried_gmake=false
     emacs_tried_gnumake=false
     AC_PATH_PROGS_FEATURE_CHECK([MAKE], [make gmake gnumake],
115 116 117 118 119 120 121 122 123 124
       [[emacs_check_gnu_make "$ac_path_MAKE"
	 if $ac_path_MAKE_found; then
	   # Use the fully-qualified program name only if the basename
	   # would not resolve to it.
	   if eval \$emacs_tried_$ac_prog; then
	     ac_cv_path_MAKE=$ac_path_MAKE
	   else
	     ac_cv_path_MAKE=$ac_prog
	   fi
	 fi
125 126
	 eval emacs_tried_$ac_prog=:]])
   fi])
127 128
$ac_path_MAKE_found || {
AC_MSG_ERROR([[Building Emacs requires GNU Make, at least version 3.81.
129 130 131 132
If you have it installed under another name, configure with 'MAKE=...'.
For example, run '$0 MAKE=gnu-make'.]])
}
MAKE=$ac_cv_path_MAKE
133
export MAKE
134

Glenn Morris's avatar
Glenn Morris committed
135 136
dnl Fairly arbitrary, older versions might work too.
AM_INIT_AUTOMAKE(1.11)
137

138 139 140 141 142
dnl Canonicalize the configuration name.
AC_CANONICAL_HOST
canonical=$host
configuration=${host_alias-${build_alias-$host}}

Eli Zaretskii's avatar
Eli Zaretskii committed
143
dnl We get MINGW64 with MSYS2, MINGW32 with MSYS.
144 145 146 147 148 149 150 151 152 153 154 155 156 157 158
case $canonical in
 *-mingw*)
  . $srcdir/nt/mingw-cfg.site

  case $srcdir in
    /* | ?:*)
      # srcdir is an absolute path.  In this case, force the format
      # "/c/foo/bar", to simplify later conversions to native Windows
      # format ("c:/foo/bar").
      srcdir=`cd "${srcdir}" && pwd -W`
      srcdir="/${srcdir:0:1}${srcdir:2}"
      ;;
  esac;;
esac

159 160 161 162 163 164 165 166 167
dnl Support for --program-prefix, --program-suffix and
dnl --program-transform-name options
AC_ARG_PROGRAM

dnl It is important that variables on the RHS not be expanded here,
dnl hence the single quotes.  This is per the GNU coding standards, see
dnl (autoconf) Installation Directory Variables
dnl See also epaths.h below.
lispdir='${datadir}/emacs/${version}/lisp'
168
standardlisppath='${lispdir}'
169 170
locallisppath='${datadir}/emacs/${version}/site-lisp:'\
'${datadir}/emacs/site-lisp'
171
lisppath='${locallisppath}:${standardlisppath}'
172 173
etcdir='${datadir}/emacs/${version}/etc'
archlibdir='${libexecdir}/emacs/${version}/${configuration}'
174
etcdocdir='${datadir}/emacs/${version}/etc'
175 176
gamedir='${localstatedir}/games/emacs'

177 178 179
dnl Special option to disable the most of other options.
AC_ARG_WITH(all,
[AS_HELP_STRING([--without-all],
180 181
		[omit almost all features and build
		small executable with minimal dependencies])],
182
  [with_features=$withval],
183
  [with_features=yes])
184

185 186 187 188 189 190 191 192 193 194 195 196 197 198 199
dnl OPTION_DEFAULT_OFF(NAME, HELP-STRING)
dnl Create a new --with option that defaults to being disabled.
dnl NAME is the base name of the option.  The shell variable with_NAME
dnl   will be set to either the user's value (if the option is
dnl   specified; 'yes' for a plain --with-NAME) or to 'no' (if the
dnl   option is not specified).  Note that the shell variable name is
dnl   constructed as autoconf does, by replacing non-alphanumeric
dnl   characters with "_".
dnl HELP-STRING is the help text for the option.
AC_DEFUN([OPTION_DEFAULT_OFF], [dnl
  AC_ARG_WITH([$1],[AS_HELP_STRING([--with-$1],[$2])],[],[dnl
    m4_bpatsubst([with_$1], [[^0-9a-z]], [_])=no])dnl
])dnl

dnl OPTION_DEFAULT_ON(NAME, HELP-STRING)
Michael Albinus's avatar
Michael Albinus committed
200
dnl Create a new --with option that defaults to $with_features.
201
dnl NAME is the base name of the option.  The shell variable with_NAME
202 203 204 205 206 207 208
dnl   will be set either to 'no' (for a plain --without-NAME) or to
dnl   'yes' (if the option is not specified).  Note that the shell
dnl   variable name is constructed as autoconf does, by replacing
dnl   non-alphanumeric characters with "_".
dnl HELP-STRING is the help text for the option.
AC_DEFUN([OPTION_DEFAULT_ON], [dnl
  AC_ARG_WITH([$1],[AS_HELP_STRING([--without-$1],[$2])],[],[dnl
209
   m4_bpatsubst([with_$1], [[^0-9a-z]], [_])=$with_features])dnl
210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254
])dnl

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

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

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

OPTION_DEFAULT_OFF([hesiod],[support Hesiod to get the POP server host])
dnl FIXME hesiod support may not be present, so it seems like an error
dnl to define, or at least use, this unconditionally.
if test "$with_hesiod" != no; then
  AC_DEFINE(HESIOD, 1, [Define to support using a Hesiod database to find the POP server.])
fi

OPTION_DEFAULT_OFF([mmdf],[support MMDF mailboxes])
if test "$with_mmdf" != no; then
   AC_DEFINE(MAIL_USE_MMDF, 1, [Define to support MMDF mailboxes in movemail.])
fi

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

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

255
AC_ARG_WITH([sound],[AS_HELP_STRING([--with-sound=VALUE],
256
  [compile with sound support (VALUE one of: yes, alsa, oss, bsd-ossaudio, no;
257
default yes).  Only for GNU/Linux, FreeBSD, NetBSD, MinGW, Cygwin.])],
258
  [ case "${withval}" in
259
      yes|no|alsa|oss|bsd-ossaudio) val=$withval ;;
260
      *) AC_MSG_ERROR([`--with-sound=$withval' is invalid;
261
this option's value should be `yes', `no', `alsa', `oss', or `bsd-ossaudio'.])
262 263 264 265 266
      ;;
    esac
    with_sound=$val
  ],
  [with_sound=$with_features])
267 268 269

dnl FIXME currently it is not the last.
dnl This should be the last --with option, because --with-x is
270
dnl added later on when we find the file name of X, and it's best to
271 272
dnl keep them together visually.
AC_ARG_WITH([x-toolkit],[AS_HELP_STRING([--with-x-toolkit=KIT],
273
 [use an X toolkit (KIT one of: yes or gtk, gtk2, gtk3, lucid or athena, motif, no)])],
274 275 276 277 278 279 280
[	  case "${withval}" in
	    y | ye | yes )	val=gtk ;;
	    n | no )		val=no  ;;
	    l | lu | luc | luci | lucid )	val=lucid ;;
	    a | at | ath | athe | athen | athena )	val=athena ;;
	    m | mo | mot | moti | motif )	val=motif ;;
	    g | gt | gtk  )	val=gtk ;;
281
	    gtk2  )	val=gtk2 ;;
282 283 284
	    gtk3  )	val=gtk3 ;;
	    * )
AC_MSG_ERROR([`--with-x-toolkit=$withval' is invalid;
285 286 287
this option's value should be `yes', `no', `lucid', `athena', `motif', `gtk',
`gtk2' or `gtk3'.  `yes' and `gtk' are synonyms.
`athena' and `lucid' are synonyms.])
288 289 290 291 292
	    ;;
	  esac
	  with_x_toolkit=$val
])

Paul Eggert's avatar
Paul Eggert committed
293 294 295 296 297
OPTION_DEFAULT_OFF([wide-int], [prefer wide Emacs integers (typically 62-bit)])
if test "$with_wide_int" = yes; then
  AC_DEFINE([WIDE_EMACS_INT], 1, [Use long long for EMACS_INT if available.])
fi

298 299
dnl _ON results in a '--without' option in the --help output, so
dnl the help text should refer to "don't compile", etc.
Paul Eggert's avatar
Paul Eggert committed
300
with_xpm_set=${with_xpm+set}
301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316
OPTION_DEFAULT_ON([xpm],[don't compile with XPM image support])
OPTION_DEFAULT_ON([jpeg],[don't compile with JPEG image support])
OPTION_DEFAULT_ON([tiff],[don't compile with TIFF image support])
OPTION_DEFAULT_ON([gif],[don't compile with GIF image support])
OPTION_DEFAULT_ON([png],[don't compile with PNG image support])
OPTION_DEFAULT_ON([rsvg],[don't compile with SVG image support])
OPTION_DEFAULT_ON([xml2],[don't compile with XML parsing support])
OPTION_DEFAULT_ON([imagemagick],[don't compile with ImageMagick image support])

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

OPTION_DEFAULT_ON([toolkit-scroll-bars],[don't use Motif or Xaw3d scroll bars])
OPTION_DEFAULT_ON([xaw3d],[don't use Xaw3d])
OPTION_DEFAULT_ON([xim],[don't use X11 XIM])
317
OPTION_DEFAULT_OFF([ns],[use NeXTstep (Cocoa or GNUstep) windowing system])
318
OPTION_DEFAULT_OFF([w32], [use native MS Windows GUI in a Cygwin build])
319 320 321 322

OPTION_DEFAULT_ON([gpm],[don't use -lgpm for mouse support on a GNU/Linux console])
OPTION_DEFAULT_ON([dbus],[don't compile with D-Bus support])
OPTION_DEFAULT_ON([gconf],[don't compile with GConf support])
323
OPTION_DEFAULT_ON([gsettings],[don't compile with GSettings support])
324 325
OPTION_DEFAULT_ON([selinux],[don't compile with SELinux support])
OPTION_DEFAULT_ON([gnutls],[don't use -lgnutls for SSL/TLS support])
Paul Eggert's avatar
Paul Eggert committed
326
OPTION_DEFAULT_ON([zlib],[don't compile with zlib decompression support])
327 328 329 330 331 332 333 334 335 336 337

AC_ARG_WITH([file-notification],[AS_HELP_STRING([--with-file-notification=LIB],
 [use a file notification library (LIB one of: yes, gfile, inotify, w32, no)])],
 [ case "${withval}" in
    y | ye | yes )	val=yes ;;
    n | no )		val=no  ;;
    g | gf | gfi | gfil | gfile )	val=gfile ;;
    i | in | ino | inot | inoti | inotif | inotify )	val=inotify ;;
    w | w3 | w32 )	val=w32 ;;
    * ) AC_MSG_ERROR([`--with-file-notification=$withval' is invalid;
this option's value should be `yes', `no', `gfile', `inotify' or `w32'.
338 339
`yes' is a synonym for `w32' on MS-Windows, for `no' on Nextstep,
otherwise for the first of `gfile' or `inotify' that is usable.])
340 341 342 343
    ;;
   esac
   with_file_notification=$val
 ],
344
 [with_file_notification=$with_features])
345 346 347 348 349 350

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

351
## This might be a 'configure' arg.
352 353
AC_SUBST([ACLOCAL_PATH])

354 355 356
## Makefile.in needs the cache file name.
AC_SUBST(cache_file)

357 358
## This is an option because I do not know if all info/man support
## compressed files, nor how to test if they do so.
359 360 361
OPTION_DEFAULT_ON([compress-install],
  [don't compress some files (.el, .info, etc.) when installing.  Equivalent to:
make GZIP_PROG= install])
362

363 364 365 366 367 368
AC_ARG_WITH(gameuser,dnl
[AS_HELP_STRING([--with-gameuser=USER],[user for shared game score files])])
test "X${with_gameuser}" != X && test "${with_gameuser}" != yes \
  && gameuser="${with_gameuser}"
test "X$gameuser" = X && gameuser=games

369
AC_ARG_WITH([gnustep-conf],dnl
370 371
[AS_HELP_STRING([--with-gnustep-conf=FILENAME],
   [name of GNUstep.conf; default $GNUSTEP_CONFIG_FILE, or /etc/GNUstep/GNUstep.conf])])
372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398
test "X${with_gnustep_conf}" != X && test "${with_gnustep_conf}" != yes && \
  GNUSTEP_CONFIG_FILE="${with_gnustep_conf}"
test "X$GNUSTEP_CONFIG_FILE" = "X" && \
     GNUSTEP_CONFIG_FILE=/etc/GNUstep/GNUstep.conf

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

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

AC_ARG_ENABLE(checking,
[AS_HELP_STRING([--enable-checking@<:@=LIST@:>@],
		[enable expensive run-time checks.  With LIST,
		 enable only specific categories of checks.
		 Categories are: all,yes,no.
		 Flags are: stringbytes, stringoverrun, stringfreelist,
399
		 xmallocoverrun, conslist, glyphs])],
400 401 402 403 404 405 406 407 408 409 410 411
[ac_checking_flags="${enableval}"],[])
IFS="${IFS= 	}"; ac_save_IFS="$IFS"; IFS="$IFS,"
for check in $ac_checking_flags
do
	case $check in
	# these set all the flags to specific states
	yes)		ac_enable_checking=1 ;;
	no)		ac_enable_checking= ;
			ac_gc_check_stringbytes= ;
	                ac_gc_check_string_overrun= ;
	                ac_gc_check_string_free_list= ;
	                ac_xmalloc_overrun= ;
412
	                ac_gc_check_cons_list= ;
413
			ac_glyphs_debug= ;;
414 415 416 417 418
	all)		ac_enable_checking=1 ;
			ac_gc_check_stringbytes=1 ;
	                ac_gc_check_string_overrun=1 ;
	                ac_gc_check_string_free_list=1 ;
	                ac_xmalloc_overrun=1 ;
419
	                ac_gc_check_cons_list=1 ;
420
			ac_glyphs_debug=1 ;;
421 422 423 424 425 426
	# these enable particular checks
	stringbytes) 	ac_gc_check_stringbytes=1 ;;
	stringoverrun) 	ac_gc_check_string_overrun=1 ;;
	stringfreelist) ac_gc_check_string_free_list=1 ;;
	xmallocoverrun)	ac_xmalloc_overrun=1 ;;
	conslist)	ac_gc_check_cons_list=1 ;;
427
	glyphs)		ac_glyphs_debug=1 ;;
428 429 430 431 432 433 434
	*)	AC_MSG_ERROR(unknown check category $check) ;;
	esac
done
IFS="$ac_save_IFS"

if test x$ac_enable_checking != x ; then
  AC_DEFINE(ENABLE_CHECKING, 1,
435
[Define to 1 if expensive run-time data type and consistency checks are enabled.])
436 437 438 439 440 441 442
fi
if test x$ac_gc_check_stringbytes != x ; then
  AC_DEFINE(GC_CHECK_STRING_BYTES, 1,
[Define this temporarily to hunt a bug.  If defined, the size of
   strings is redundantly recorded in sdata structures so that it can
   be compared to the sizes recorded in Lisp strings.])
fi
443
if test x$ac_gc_check_string_overrun != x ; then
444 445 446 447 448 449 450 451 452 453 454 455 456 457 458
  AC_DEFINE(GC_CHECK_STRING_OVERRUN, 1,
[Define this to check for short string overrun.])
fi
if test x$ac_gc_check_string_free_list != x ; then
  AC_DEFINE(GC_CHECK_STRING_FREE_LIST, 1,
[Define this to check the string free list.])
fi
if test x$ac_xmalloc_overrun != x ; then
  AC_DEFINE(XMALLOC_OVERRUN_CHECK, 1,
[Define this to check for malloc buffer overrun.])
fi
if test x$ac_gc_check_cons_list != x ; then
  AC_DEFINE(GC_CHECK_CONS_LIST, 1,
[Define this to check for errors in cons list.])
fi
459
if test x$ac_glyphs_debug != x ; then
460 461 462
  AC_DEFINE(GLYPH_DEBUG, 1,
[Define this to enable glyphs debugging code.])
fi
463

464 465 466 467
AC_ARG_ENABLE(check-lisp-object-type,
[AS_HELP_STRING([--enable-check-lisp-object-type],
                [enable compile time checks for the Lisp_Object data type.
		This is useful for development for catching certain types of bugs.])],
468
if test "${enableval}" != "no"; then
469 470
   AC_DEFINE(CHECK_LISP_OBJECT_TYPE, 1,
   [Define this to enable compile time checks for the Lisp_Object data type.])
471 472 473
fi)


474 475 476 477
dnl The name of this option is unfortunate.  It predates, and has no
dnl relation to, the "sampling-based elisp profiler" added in 24.3.
dnl Actually, it stops it working.
dnl http://lists.gnu.org/archive/html/emacs-devel/2012-11/msg00393.html
478 479
AC_ARG_ENABLE(profiling,
[AS_HELP_STRING([--enable-profiling],
480 481 482
		[build emacs with low-level, gprof profiling support.
                Mainly useful for debugging Emacs itself.  May not work on
                all platforms.  Stops profiler.el working.])],
483 484 485 486 487 488 489 490 491 492 493
[ac_enable_profiling="${enableval}"],[])
if test x$ac_enable_profiling != x ; then
   PROFILING_CFLAGS="-DPROFILING=1 -pg"
else
   PROFILING_CFLAGS=
fi
AC_SUBST(PROFILING_CFLAGS)

AC_ARG_ENABLE(autodepend,
[AS_HELP_STRING([--enable-autodepend],
		[automatically generate dependencies to .h-files.
Glenn Morris's avatar
Glenn Morris committed
494
 		 Requires gcc, enabled if found.])],
495 496
[ac_enable_autodepend="${enableval}"],[ac_enable_autodepend=yes])

497 498 499 500 501
AC_ARG_ENABLE(gtk-deprecation-warnings,
[AS_HELP_STRING([--enable-gtk-deprecation-warnings],
		[Show Gtk+/Gdk deprecation warnings for Gtk+ >= 3.0])],
[ac_enable_gtk_deprecation_warnings="${enableval}"],[])

502 503 504 505 506 507 508 509 510 511 512 513
dnl This used to use changequote, but, apart from `changequote is evil'
dnl per the autoconf manual, we can speed up autoconf somewhat by quoting
dnl the great gob of text.  Thus it's not processed for possible expansion.
dnl Just make sure the brackets remain balanced.
dnl
dnl Since Emacs can't find matching pairs of quotes, boundaries are
dnl indicated by comments.
dnl quotation begins
[

### If you add support for a new configuration, add code to this
### switch statement to recognize your configuration name and select
Glenn Morris's avatar
Glenn Morris committed
514 515
### the appropriate opsys.

516 517 518 519 520 521
### As far as handling version numbers on operating systems is
### concerned, make sure things will fail in a fixable way.  If
### /etc/MACHINES doesn't say anything about version numbers, be
### prepared to handle anything reasonably.  If version numbers
### matter, be sure /etc/MACHINES says something about it.

Paul Eggert's avatar
Paul Eggert committed
522
opsys='' unported=no
523 524
case "${canonical}" in

525 526
  ## GNU/Linux and similar ports
  *-*-linux* )
527 528 529
    opsys=gnu-linux
  ;;

530 531 532 533 534
  ## FreeBSD ports
  *-*-freebsd* )
    opsys=freebsd
  ;;

535 536 537 538 539
  ## DragonFly ports
  *-*-dragonfly* )
    opsys=dragonfly
  ;;

540 541 542 543 544 545 546 547 548 549 550
  ## FreeBSD kernel + glibc based userland
  *-*-kfreebsd*gnu* )
    opsys=gnu-kfreebsd
  ;;

  ## NetBSD ports
  *-*-netbsd* )
    opsys=netbsd
  ;;

  ## OpenBSD ports
551
  *-*-openbsd* | *-*-mirbsd* )
552 553 554 555 556 557
    opsys=openbsd
  ;;

  ## Apple Darwin / Mac OS X
  *-apple-darwin* )
    case "${canonical}" in
Paul Eggert's avatar
Paul Eggert committed
558 559 560
      i[3456]86-* )  ;;
      powerpc-* )    ;;
      x86_64-* )     ;;
561 562 563
      * )            unported=yes ;;
    esac
    opsys=darwin
564 565 566 567 568 569
    ## Use fink packages if available.
    ## FIXME find a better way to do this: http://debbugs.gnu.org/11507
##    if test -d /sw/include && test -d /sw/lib; then
##      GCC_TEST_OPTIONS="-I/sw/include -L/sw/lib"
##      NON_GCC_TEST_OPTIONS=${GCC_TEST_OPTIONS}
##    fi
570 571
  ;;

572 573 574 575 576
  ## Cygwin ports
  *-*-cygwin )
    opsys=cygwin
  ;;

577 578
  ## HP 9000 series 700 and 800, running HP/UX
  hppa*-hp-hpux10.2* )
579
    opsys=hpux10-20
580 581
  ;;
  hppa*-hp-hpux1[1-9]* )
582
    opsys=hpux11
583 584 585 586 587
    CFLAGS="-D_INCLUDE__STDC_A1_SOURCE $CFLAGS"
  ;;

  ## IBM machines
  rs6000-ibm-aix4.[23]* )
Paul Eggert's avatar
Paul Eggert committed
588
    opsys=aix4-2
589 590
  ;;
  powerpc-ibm-aix4.[23]*  )
Paul Eggert's avatar
Paul Eggert committed
591
    opsys=aix4-2
592 593
  ;;
  rs6000-ibm-aix[56]* )
Paul Eggert's avatar
Paul Eggert committed
594
    opsys=aix4-2
595
  ;;
Paul Eggert's avatar
Paul Eggert committed
596
  powerpc-ibm-aix[5-9]* | powerpc-ibm-aix[1-9][0-9]* )
Paul Eggert's avatar
Paul Eggert committed
597
    opsys=aix4-2
598 599 600 601 602
  ;;

  ## Silicon Graphics machines
  ## Iris 4D
  mips-sgi-irix6.5 )
603
    opsys=irix6-5
604 605 606 607 608 609 610 611 612 613 614
    # Without defining _LANGUAGE_C, things get masked out in the headers
    # so that, for instance, grepping for `free' in stdlib.h fails and
    # AC_HEADER_STD_C fails.   (MIPSPro 7.2.1.2m compilers, Irix 6.5.3m).
    NON_GCC_TEST_OPTIONS="-D_LANGUAGE_C"
  ;;

  ## Suns
  *-sun-solaris* \
    | i[3456]86-*-solaris2* | i[3456]86-*-sunos5* \
    | x86_64-*-solaris2*    | x86_64-*-sunos5*)
    case "${canonical}" in
Paul Eggert's avatar
Paul Eggert committed
615 616 617
      i[3456]86-*-* )   ;;
      amd64-*-*|x86_64-*-*) ;;
      sparc* )		;;
618 619 620
      * )		unported=yes ;;
    esac
    case "${canonical}" in
621 622 623 624
      *-sunos5.[1-9][0-9]* | *-solaris2.[1-9][0-9]* )
		opsys=sol2-10
		emacs_check_sunpro_c=yes
		;;
625 626
      *-sunos5.[1-5]* | *-solaris2.[1-5]* ) unported=yes ;;
      ## Note that Emacs 23.1's NEWS said the following would be dropped.
627 628 629 630
      *-sunos5.6* | *-solaris2.6* )
		opsys=sol2-6
		RANLIB="ar -ts"
		;;
631
      ## 5.7 EOL Aug 2008, 5.8 EOL Mar 2012.
632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652
      *-sunos5.[7-9]* | *-solaris2.[7-9]* )
		opsys=sol2-6
		emacs_check_sunpro_c=yes
		;;
    esac
    ## Watch out for a compiler that we know will not work.
    case "${canonical}" in
     *-solaris* | *-sunos5* )
		if [ "x$CC" = x/usr/ucb/cc ]; then
		  ## /usr/ucb/cc doesn't work;
		  ## we should find some other compiler that does work.
		  unset CC
		fi
		;;
      *) ;;
    esac
  ;;

  ## Intel 386 machines where we don't care about the manufacturer.
  i[3456]86-*-* )
    case "${canonical}" in
653
      *-darwin* )               opsys=darwin ;;
654
      *-mingw* )
655
		opsys=mingw32
656
		# MinGW overrides and adds some system headers in nt/inc.
657
		GCC_TEST_OPTIONS="-I $srcdir/nt/inc"
658
		;;
659 660 661
      *-sysv4.2uw* )	  	opsys=unixware ;;
      *-sysv5uw* )	  	opsys=unixware ;;
      *-sysv5OpenUNIX* )  	opsys=unixware ;;
662 663 664 665
      ## Otherwise, we'll fall through to the generic opsys code at the bottom.
    esac
  ;;

666 667 668
  # MinGW64
  x86_64-*-* )
    case "${canonical}" in
669
      *-mingw* )
670 671 672 673 674 675 676 677
		opsys=mingw32
		# MinGW overrides and adds some system headers in nt/inc.
		GCC_TEST_OPTIONS="-I $srcdir/nt/inc"
		;;
      ## Otherwise, we'll fall through to the generic opsys code at the bottom.
    esac
  ;;

678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701
  * )
    unported=yes
  ;;
esac

### If the code above didn't choose an operating system, just choose
### an operating system based on the configuration name.  You really
### only want to use this when you have no idea what the right
### operating system is; if you know what operating systems a machine
### runs, it's cleaner to make it explicit in the case statement
### above.
if test x"${opsys}" = x; then
  case "${canonical}" in
    *-gnu* )				opsys=gnu ;;
    * )
      unported=yes
    ;;
  esac
fi

]
dnl quotation ends

if test $unported = yes; then
Glenn Morris's avatar
Glenn Morris committed
702
  AC_MSG_ERROR([Emacs does not support `${canonical}' systems.
Glenn Morris's avatar
Glenn Morris committed
703
If you think it should, please send a report to ${PACKAGE_BUGREPORT}.
704 705 706 707 708
Check `etc/MACHINES' for recognized configuration names.])
fi


#### Choose a compiler.
709

Paul Eggert's avatar
Paul Eggert committed
710 711 712
dnl Don't bother to test for C89.
AC_DEFUN([_AC_PROG_CC_C89], [$2])

713
dnl Sets GCC=yes if using gcc.
714
AC_PROG_CC([gcc cc cl clang "$XCRUN gcc" "$XCRUN clang"])
715
if test -n "$XCRUN"; then
716
  AC_CHECK_PROGS(AR, [ar "$XCRUN ar"])
717
  test -n "$AR" && export AR
718
fi
719

Paul Eggert's avatar
Paul Eggert committed
720 721 722
dnl Emacs needs C99 or later.
gl_PROG_CC_C99

Paul Eggert's avatar
Paul Eggert committed
723 724
AM_PROG_CC_C_O

725 726 727 728 729 730
if test x$GCC = xyes; then
  test "x$GCC_TEST_OPTIONS" != x && CC="$CC $GCC_TEST_OPTIONS"
else
  test "x$NON_GCC_TEST_OPTIONS" != x && CC="$CC $NON_GCC_TEST_OPTIONS"
fi

731 732 733 734 735
dnl This is used in lib/Makefile.am to use nt/gnulib.mk, the
dnl alternative to lib/gnulib.mk, so as to avoid generating header files
dnl that clash with MinGW.
AM_CONDITIONAL([BUILDING_FOR_WINDOWSNT], [test "x$opsys" = "xmingw32"])

736 737
# Avoid gnulib's tests for -lcrypto, so that there's no static dependency on it.
AC_DEFUN([gl_CRYPTO_CHECK])
738 739
# Avoid gnulib's tests for HAVE_WORKING_O_NOATIME and HAVE_WORKING_O_NOFOLLOW,
# as we don't use them.
740
AC_DEFUN([gl_FCNTL_O_FLAGS])
741

742
# Initialize gnulib right after choosing the compiler.
Glenn Morris's avatar
Comment  
Glenn Morris committed
743
dnl Amongst other things, this sets AR and ARFLAGS.
744 745
gl_EARLY

746
if test "$ac_test_CFLAGS" != set; then
Paul Eggert's avatar
Paul Eggert committed
747 748 749
  # It's helpful to have C macros available to GDB, so prefer -g3 to -g
  # if -g3 works and the user does not specify CFLAGS.
  # This test must follow gl_EARLY; otherwise AC_LINK_IFELSE complains.
750 751 752 753 754 755 756 757 758 759 760 761 762 763 764
  case $CFLAGS in
    '-g')
      emacs_g3_CFLAGS='-g3';;
    '-g -O2')
      emacs_g3_CFLAGS='-g3 -O2';;
    *)
      emacs_g3_CFLAGS='';;
  esac
  if test -n "$emacs_g3_CFLAGS"; then
    emacs_save_CFLAGS=$CFLAGS
    CFLAGS=$emacs_g3_CFLAGS
    AC_CACHE_CHECK([whether $CC accepts $emacs_g3_CFLAGS],
      [emacs_cv_prog_cc_g3],
      [AC_LINK_IFELSE([AC_LANG_PROGRAM()],
	 [emacs_cv_prog_cc_g3=yes],
Paul Eggert's avatar
Paul Eggert committed
765 766
	 [emacs_cv_prog_cc_g3=no])])
    if test $emacs_cv_prog_cc_g3 != yes; then
767 768
      CFLAGS=$emacs_save_CFLAGS
    fi
769 770 771
    if test $opsys = mingw32; then
      CFLAGS="$CFLAGS -gdwarf-2"
    fi
772
  fi
Paul Eggert's avatar
Paul Eggert committed
773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790

  case $CFLAGS in
    *-O*) ;;
    *)
      # No optimization flag was inferred for this non-GCC compiler.
      # Try -O.  This is needed for xlc on AIX; see Bug#14258.
      emacs_save_CFLAGS=$CFLAGS
      test -z "$CFLAGS" || CFLAGS="$CFLAGS "
      CFLAGS=${CFLAGS}-O
      AC_CACHE_CHECK([whether $CC accepts -O],
        [emacs_cv_prog_cc_o],
	[AC_LINK_IFELSE([AC_LANG_PROGRAM()],
	   [emacs_cv_prog_cc_o=yes],
	   [emacs_cv_prog_cc_o=no])])
      if test $emacs_cv_prog_cc_o != yes; then
	CFLAGS=$emacs_save_CFLAGS
      fi ;;
  esac
791 792
fi

793 794
AC_ARG_ENABLE([gcc-warnings],
  [AS_HELP_STRING([--enable-gcc-warnings],
795
                  [turn on lots of GCC warnings/errors. This is intended for
796 797
		   developers, and may generate false alarms when used
		   with older or non-GNU development tools.])],
798 799 800 801 802 803 804 805
  [case $enableval in
     yes|no) ;;
     *)      AC_MSG_ERROR([bad value $enableval for gcc-warnings option]) ;;
   esac
   gl_gcc_warnings=$enableval],
  [gl_gcc_warnings=no]
)

806 807 808 809 810
# clang is unduly picky about some things.
AC_CACHE_CHECK([whether the compiler is clang], [emacs_cv_clang],
  [AC_COMPILE_IFELSE(
     [AC_LANG_PROGRAM([[
	  #ifndef __clang__
Paul Eggert's avatar
Paul Eggert committed
811
	    error "not clang";
812 813 814 815 816
	  #endif
        ]])],
     [emacs_cv_clang=yes],
     [emacs_cv_clang=no])])

817 818 819 820
# When compiling with GCC, prefer -isystem to -I when including system
# include files, to avoid generating useless diagnostics for the files.
if test "$gl_gcc_warnings" != yes; then
  isystem='-I'
821 822 823 824 825 826 827
  if test "$emacs_cv_clang" = yes
  then
     # Turn off some warnings if supported.
     gl_WARN_ADD([-Wno-switch])
     gl_WARN_ADD([-Wno-tautological-constant-out-of-range-compare])
     gl_WARN_ADD([-Wno-pointer-sign])
  fi
828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846
else
  isystem='-isystem '

  # This, $nw, is the list of warnings we disable.
  nw=

  case $with_x_toolkit in
    lucid | athena | motif)
       # Old toolkits mishandle 'const'.
       nw="$nw -Wwrite-strings"
       ;;
    *)
       gl_WARN_ADD([-Werror], [WERROR_CFLAGS])
       ;;
  esac
  AC_SUBST([WERROR_CFLAGS])

  nw="$nw -Wsystem-headers"         # Don't let system headers trigger warnings
  nw="$nw -Woverlength-strings"     # Not a problem these days
847
  nw="$nw -Wformat-nonliteral"      # we do this a lot
Paul Eggert's avatar
Paul Eggert committed
848
  nw="$nw -Wvla"                    # Emacs uses <vla.h>.
849
  nw="$nw -Wswitch-default"         # Too many warnings for now
850
  nw="$nw -Winline"                 # OK to ignore 'inline'
851
  nw="$nw -Wjump-misses-init"       # We sometimes safely jump over init.
852 853
  nw="$nw -Wstrict-overflow"        # OK to optimize assuming that
                                    # signed overflow has undefined behavior
854 855
  nw="$nw -Wsync-nand"              # irrelevant here, and provokes ObjC warning
  nw="$nw -Wunsafe-loop-optimizations" # OK to suppress unsafe optimizations
856
  nw="$nw -Wbad-function-cast"      # These casts are no worse than others.
857 858 859 860 861

  # Emacs doesn't care about shadowing; see
  # <http://lists.gnu.org/archive/html/emacs-diffs/2011-11/msg00265.html>.
  nw="$nw -Wshadow"

862 863 864
  # Emacs's use of alloca inhibits protecting the stack.
  nw="$nw -Wstack-protector"

Paul Eggert's avatar
Paul Eggert committed
865 866
  # Emacs's use of partly-pure functions such as CHECK_TYPE make this
  # option problematic.
867 868
  nw="$nw -Wsuggest-attribute=pure"

869 870 871 872 873 874 875
  # This part is merely for shortening the command line,
  # since -Wno-FOO needs to be added below regardless.
  nw="$nw -Wmissing-field-initializers"
  nw="$nw -Wswitch"
  nw="$nw -Wtype-limits"
  nw="$nw -Wunused-parameter"

876 877 878 879
  if test $emacs_cv_clang = yes; then
    nw="$nw -Wcast-align"
  fi

880 881 882 883 884
  gl_MANYWARN_ALL_GCC([ws])
  gl_MANYWARN_COMPLEMENT([ws], [$ws], [$nw])
  for w in $ws; do
    gl_WARN_ADD([$w])
  done
Paul Eggert's avatar
Paul Eggert committed
885
  gl_WARN_ADD([-Wredundant-decls])     # Prefer this, as we don't use Bison.
886 887 888 889 890 891 892
  gl_WARN_ADD([-Wno-missing-field-initializers]) # We need this one
  gl_WARN_ADD([-Wno-sign-compare])     # Too many warnings for now
  gl_WARN_ADD([-Wno-type-limits])      # Too many warnings for now
  gl_WARN_ADD([-Wno-switch])           # Too many warnings for now
  gl_WARN_ADD([-Wno-unused-parameter]) # Too many warnings for now
  gl_WARN_ADD([-Wno-format-nonliteral])

893 894 895 896 897 898 899 900
  # More things that clang is unduly picky about.
  if test $emacs_cv_clang = yes; then
    gl_WARN_ADD([-Wno-format-extra-args])
    gl_WARN_ADD([-Wno-tautological-constant-out-of-range-compare])
    gl_WARN_ADD([-Wno-unused-command-line-argument])
    gl_WARN_ADD([-Wno-unused-value])
  fi

901
  AC_DEFINE([lint], [1], [Define to 1 if the compiler is checking for lint.])
902 903 904
  AH_VERBATIM([FORTIFY_SOURCE],
  [/* Enable compile-time and run-time bounds-checking, and some warnings,
      without upsetting glibc 2.15+. */
905
   #if !defined _FORTIFY_SOURCE && defined __OPTIMIZE__ && __OPTIMIZE__
906 907 908
   # define _FORTIFY_SOURCE 2
   #endif
  ])
909 910 911 912 913 914 915 916 917
  AC_DEFINE([GNULIB_PORTCHECK], [1], [enable some gnulib portability checks])

  # We use a slightly smaller set of warning options for lib/.
  # Remove the following and save the result in GNULIB_WARN_CFLAGS.
  nw=
  nw="$nw -Wunused-macros"

  gl_MANYWARN_COMPLEMENT([GNULIB_WARN_CFLAGS], [$WARN_CFLAGS], [$nw])
  AC_SUBST([GNULIB_WARN_CFLAGS])
918 919
fi

920 921 922 923 924 925 926
edit_cflags="
  s,///*,/,g
  s/^/ /
  s/ -I/ $isystem/g
  s/^ //
"

927 928 929
AC_ARG_ENABLE(link-time-optimization,
[AS_HELP_STRING([--enable-link-time-optimization],
                [build emacs with link-time optimization.
930 931 932 933 934
		 This requires GCC 4.5.0 or later, or clang.
		 (Note that clang support is experimental - see INSTALL.)
		 It also makes Emacs harder to debug, and when we tried it
		 with GCC 4.9.0 x86-64 it made Emacs slower, so it's not
		 recommended for typical use.])],
935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971
if test "${enableval}" != "no"; then
   ac_lto_supported=no
   if test $emacs_cv_clang = yes; then
      AC_MSG_CHECKING([whether link-time optimization is supported by clang])
      GOLD_PLUGIN=`$CC -print-file-name=LLVMgold.so 2>/dev/null`
      if test -x "$GOLD_PLUGIN"; then
	 LTO="-flto"
      fi
   elif test x$GCC = xyes; then
      AC_MSG_CHECKING([whether link-time optimization is supported by gcc])
      CPUS=`getconf _NPROCESSORS_ONLN 2>/dev/null`
      if test x$CPUS != x; then
	 LTO="-flto=$CPUS"
      else
	 LTO="-flto"
      fi
   else
      AC_MSG_ERROR([Link-time optimization is not supported with your compiler.])
   fi
   if test -z "$LTO"; then
      ac_lto_supported=no
   else
      old_CFLAGS=$CFLAGS
      CFLAGS="$CFLAGS $LTO"
      AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
         [ac_lto_supported=yes], [ac_lto_supported=no])
         CFLAGS="$old_CFLAGS"
   fi
   AC_MSG_RESULT([$ac_lto_supported])
   if test "$ac_lto_supported" = "yes"; then
      CFLAGS="$CFLAGS $LTO"
      if test x$emacs_cv_clang = xyes; then
	 AC_MSG_WARN([Please read INSTALL before using link-time optimization with clang])
	 # WARNING: 'ar --plugin ...' doesn't work without
	 # command, so plugin name is appended to ARFLAGS.
	 ARFLAGS="cru --plugin $GOLD_PLUGIN"
	 RANLIB="$RANLIB --plugin $GOLD_PLUGIN"
972 973 974 975 976 977 978
      else
        dnl The following is needed for GCC 4.9.0.  The GCC 4.9.0 release notes
        dnl suggest that instead of -ffat-lto-objects we should use gcc-ar and
        dnl gcc-ranlib in place of ar and ranlib, but gcc-ar makes /usr/bin/ar
        dnl dump core on Fedora 20, so play it safe for now.
        gl_COMPILER_OPTION_IF([-ffat-lto-objects],
          [CFLAGS="$CFLAGS -ffat-lto-objects"])
979 980 981
      fi
   fi
fi)
982

983 984 985 986 987 988 989 990 991 992 993
dnl Port to Automake 1.11.
dnl This section can be removed once we assume Automake 1.14 or later.
: ${AM_DEFAULT_VERBOSITY=1}
: ${AM_V=$AM_DEFAULT_VERBOSITY}
: ${AM_DEFAULT_V=$AM_DEFAULT_VERBOSITY}
AC_SUBST([AM_V])
AM_SUBST_NOTMAKE([AM_V])
AC_SUBST([AM_DEFAULT_V])
AM_SUBST_NOTMAKE([AM_DEFAULT_V])
AC_SUBST([AM_DEFAULT_VERBOSITY])

994 995 996 997 998 999 1000
dnl Some other nice autoconf tests.
dnl These are commented out, since gl_EARLY and/or Autoconf already does them.
dnl AC_PROG_INSTALL
dnl AC_PROG_MKDIR_P
dnl if test "x$RANLIB" = x; then
dnl   AC_PROG_RANLIB
dnl fi
1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014


dnl Sadly, AC_PROG_LN_S is too restrictive.  It also tests whether links
dnl can be made to directories.  This is not relevant for our usage, and
dnl excludes some cases that work fine for us.  Eg MS Windows or files
dnl hosted on AFS, both examples where simple links work, but links to
dnl directories fail.  We use a cut-down version instead.
dnl AC_PROG_LN_S

AC_MSG_CHECKING([whether ln -s works for files in the same directory])
rm -f conf$$ conf$$.file

LN_S_FILEONLY='cp -p'

1015 1016
dnl On MinGW, ensure we will call the MSYS /bin/ln.exe, not some
dnl random program in the current directory.
1017 1018
if (echo >conf$$.file) 2>/dev/null; then
  if ln -s conf$$.file conf$$ 2>/dev/null; then
1019 1020 1021 1022 1023
    if test "$opsys" = "mingw32"; then
      LN_S_FILEONLY='/bin/ln -s'
    else
      LN_S_FILEONLY='ln -s'
    fi
1024
  elif ln conf$$.file conf$$ 2>/dev/null; then
1025 1026 1027 1028 1029
    if test "$opsys" = "mingw32"; then
      LN_S_FILEONLY=/bin/ln
    else
      LN_S_FILEONLY=ln
    fi
1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042
  fi
fi

rm -f conf$$ conf$$.file

if test "$LN_S_FILEONLY" = "ln -s"; then
   AC_MSG_RESULT([yes])
else
   AC_MSG_RESULT([no, using $LN_S_FILEONLY])
fi

AC_SUBST(LN_S_FILEONLY)

1043

1044 1045 1046 1047 1048 1049
dnl AC_PROG_LN_S sets LN_S to 'cp -pR' for MinGW, on the premise that 'ln'
dnl doesn't support links to directories, as in "ln file dir".  But that
dnl use is non-portable, and OTOH MinGW wants to use hard links for Emacs
dnl executables at "make install" time.
dnl See http://lists.gnu.org/archive/html/emacs-devel/2013-04/msg00475.html
dnl for more details.
1050
if test "$opsys" = "mingw32"; then
Eli Zaretskii's avatar
Eli Zaretskii committed
1051
  LN_S="/bin/ln"
1052 1053
fi

1054 1055 1056 1057
dnl On some Debian versions, "install-info" prints irritating messages
dnl "This is not dpkg install-info anymore, but GNU install-info"
dnl if called via an absolute file name.
dnl Use the entirely-identical-but-quieter ginstall-info instead if present.
1058 1059 1060 1061 1062
dnl Sadly some people may have an old ginstall-info installed on
dnl non-Debian systems, so we can't use this.
dnl AC_PATH_PROGS(INSTALL_INFO, [ginstall-info install-info], :,
dnl   $PATH$PATH_SEPARATOR/usr/sbin$PATH_SEPARATOR/sbin)

1063 1064
AC_PATH_PROG(INSTALL_INFO, install-info, :,
  $PATH$PATH_SEPARATOR/usr/sbin$PATH_SEPARATOR/sbin)
1065 1066 1067
dnl Don't use GZIP, which is used by gzip for additional parameters.
AC_PATH_PROG(GZIP_PROG, gzip)

1068
test $with_compress_install != yes && test -n "$GZIP_PROG" && \
1069 1070
   GZIP_PROG=" # $GZIP_PROG # (disabled by configure --without-compress-install)"

1071 1072 1073
if test $opsys = gnu-linux; then
  AC_PATH_PROG(PAXCTL, paxctl,,
    [$PATH$PATH_SEPARATOR/sbin$PATH_SEPARATOR/usr/sbin])
1074 1075 1076 1077 1078 1079
  if test "X$PAXCTL" != X; then
    AC_MSG_CHECKING([whether binaries have a PT_PAX_FLAGS header])
    AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])],
      [if $PAXCTL -v conftest$EXEEXT >/dev/null 2>&1; then AC_MSG_RESULT(yes)
      else AC_MSG_RESULT(no); PAXCTL=""; fi])
  fi
1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092

  if test "${SETFATTR+set}" != set; then
    AC_CACHE_CHECK([for setfattr],
      [emacs_cv_prog_setfattr],
      [touch conftest.tmp
       if (setfattr -n user.pax.flags conftest.tmp) >/dev/null 2>&1; then
	 emacs_cv_prog_setfattr=yes
       else
	 emacs_cv_prog_setfattr=no
       fi])
    if test "$emacs_cv_prog_setfattr" = yes; then
      SETFATTR=setfattr
    else
Paul Eggert's avatar
Paul Eggert committed
1093
      SETFATTR=
1094 1095 1096 1097
    fi
    rm -f conftest.tmp
    AC_SUBST([SETFATTR])
  fi
1098
fi
1099

1100
## Need makeinfo >= 4.7 (?) to build the manuals.
1101
if test "$MAKEINFO" != "no"; then
1102 1103 1104 1105
  if test "$MAKEINFO" = "${am_missing_run}makeinfo"; then
    MAKEINFO=makeinfo
  fi
  case `($MAKEINFO --version) 2>/dev/null` in
1106 1107 1108 1109
    *' (GNU texinfo) '4.[[7-9]]* | \
    *' (GNU texinfo) '4.[[1-9][0-9]]* | \
    *' (GNU texinfo) '[[5-9]]* | \
    *' (GNU texinfo) '[[1-9][0-9]]* ) ;;
1110
    *) MAKEINFO=no;;
1111
  esac
1112 1113 1114 1115 1116 1117
fi

## Makeinfo is unusual.  For a released Emacs, the manuals are
## pre-built, and not deleted by the normal clean rules.  makeinfo is
## therefore in the category of "special tools" not normally required, which
## configure does not have to check for (eg autoconf itself).
1118 1119
## In a repository checkout on the other hand, the manuals are not included.
## So makeinfo is a requirement to build from the repository, and configure
1120 1121
## should test for it as it does for any other build requirement.
## We use the presence of $srcdir/info/emacs to distinguish a release,
1122
## with pre-built manuals, from a repository checkout.
1123 1124
HAVE_MAKEINFO=yes

1125
if test "$MAKEINFO" = "no"; then
1126
  MAKEINFO=makeinfo
1127
  if test "x${with_makeinfo}" = "xno"; then
1128
    HAVE_MAKEINFO=no
1129
  elif test ! -e "$srcdir/info/emacs" && test ! -e "$srcdir/info/emacs.info"; then
1130
    AC_MSG_ERROR( [You do not seem to have makeinfo >= 4.7, and your
1131 1132 1133 1134 1135
source tree does not seem to have pre-built manuals in the `info' directory.
Either install a suitable version of makeinfo, or re-run configure
with the `--without-makeinfo' option to build without the manuals.] )
  fi
fi
1136
AC_SUBST(HAVE_MAKEINFO)
1137

1138
if test $opsys = mingw32; then
1139
   DOCMISC_W32=efaq-w32
1140
else
1141
   DOCMISC_W32=
1142
fi
1143
AC_SUBST(DOCMISC_W32)
1144

1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160
dnl Add our options to ac_link now, after it is set up.

if test x$GCC = xyes; then
  test "x$GCC_LINK_TEST_OPTIONS" != x && \
    ac_link="$ac_link $GCC_LINK_TEST_OPTIONS"
else
  test "x$NON_GCC_LINK_TEST_OPTIONS" != x && \
    ac_link="$ac_link $NON_GCC_LINK_TEST_OPTIONS"
fi

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

1161 1162 1163 1164
dnl For a long time, -znocombreloc was added to LDFLAGS rather than
dnl LD_SWITCH_SYSTEM_TEMACS.  That is:
dnl * inappropriate, as LDFLAGS is a user option but this is essential.
dnl   Eg "make LDFLAGS=... all" could run into problems,
1165
dnl   http://bugs.debian.org/684788
1166 1167
dnl * unnecessary, since temacs is the only thing that actually needs it.
dnl   Indeed this is where it was originally, prior to:
1168
dnl   http://lists.gnu.org/archive/html/emacs-pretest-bug/2004-03/msg00170.html
1169
late_LDFLAGS="$LDFLAGS"
1170
if test x$GCC = xyes; then
1171
  LDFLAGS_NOCOMBRELOC="-Wl,-znocombreloc"
1172
else
1173
  LDFLAGS_NOCOMBRELOC="-znocombreloc"
1174 1175
fi

1176 1177
LDFLAGS="$LDFLAGS $LDFLAGS_NOCOMBRELOC"

1178 1179 1180
AC_MSG_CHECKING([for -znocombreloc])
AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])],
  [AC_MSG_RESULT(yes)],
1181
  LDFLAGS_NOCOMBRELOC=
1182 1183
  [AC_MSG_RESULT(no)])

1184
LDFLAGS="$late_LDFLAGS"
1185

1186 1187 1188 1189 1190 1191 1192 1193 1194
AC_CACHE_CHECK([whether addresses are sanitized],
  [emacs_cv_sanitize_address],
  [AC_COMPILE_IFELSE(
     [AC_LANG_PROGRAM(
	[[#ifndef __has_feature
	  #define __has_feature(f) 0
	  #endif
	  #if defined __SANITIZE_ADDRESS__ || __has_feature (address_sanitizer)
	  #else
Paul Eggert's avatar
Paul Eggert committed
1195
	   error "Addresses are not sanitized.";
1196 1197 1198 1199 1200
	  #endif
	]])],
     [emacs_cv_sanitize_address=yes],
     [emacs_cv_sanitize_address=no])])

1201 1202
dnl The function dump-emacs will not be defined and temacs will do
dnl (load "loadup") automatically unless told otherwise.
1203
test "x$CANNOT_DUMP" = "x" && CANNOT_DUMP=no
1204
case "$opsys" in
1205
  your-opsys-here) CANNOT_DUMP=yes ;;
1206
esac
1207

1208
if test "$CANNOT_DUMP" = "yes"; then
1209
  AC_DEFINE(CANNOT_DUMP, 1, [Define if Emacs cannot be dumped on your system.])
1210 1211 1212
elif test "$emacs_cv_sanitize_address" = yes; then
  AC_MSG_WARN([[Addresses are sanitized; suggest CANNOT_DUMP=yes]])
fi
1213

1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231
AC_SUBST(CANNOT_DUMP)


UNEXEC_OBJ=unexelf.o
case "$opsys" in
  # MSDOS uses unexcoff.o
  aix4-2)
   UNEXEC_OBJ=unexaix.o
   ;;
  cygwin)
   UNEXEC_OBJ=unexcw.o
   ;;
  darwin)
   UNEXEC_OBJ=unexmacosx.o
   ;;
  hpux10-20 | hpux11)
   UNEXEC_OBJ=unexhp9k800.o
   ;;
1232 1233 1234
  mingw32)
   UNEXEC_OBJ=unexw32.o
   ;;
1235 1236 1237 1238 1239
  sol2-10)
   # Use the Solaris dldump() function, called from unexsol.c, to dump
   # emacs, instead of the generic ELF dump code found in unexelf.c.
   # The resulting binary has a complete symbol table, and is better
   # for debugging and other observability tools (debuggers, pstack, etc).
Paul Eggert's avatar
Paul Eggert committed
1240
   #
1241 1242 1243
   # If you encounter a problem using dldump(), please consider sending
   # a message to the OpenSolaris tools-linking mailing list:
   #      http://mail.opensolaris.org/mailman/listinfo/tools-linking
Paul Eggert's avatar
Paul Eggert committed
1244
   #
1245 1246 1247 1248 1249 1250 1251 1252
   # It is likely that dldump() works with older Solaris too, but this has
   # not been tested, so for now this change is for Solaris 10 or newer.
   UNEXEC_OBJ=unexsol.o
   ;;
esac

LD_SWITCH_SYSTEM=
case "$opsys" in
1253
  freebsd|dragonfly)
1254 1255 1256
   ## Let `ld' find image libs and similar things in /usr/local/lib.
   ## The system compiler, GCC, has apparently been modified to not
   ## look there, contrary to what a stock GCC would do.