configure.ac 168 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
dnl We get MINGW64 with MSYS2
if test "x$MSYSTEM" = "xMINGW32" -o "x$MSYSTEM" = "xMINGW64"
30
then
31
  . $srcdir/nt/mingw-cfg.site
32

33 34 35 36 37 38 39 40 41
  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
42
fi
Dani Moncayo's avatar
Dani Moncayo committed
43

44 45 46 47 48 49
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=
50 51
dnl This is the documented way to record the args passed to configure,
dnl rather than $ac_configure_args.
52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80
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=' '
81 82
done

83
AC_CONFIG_HEADERS(src/config.h:src/config.in)
84
AC_CONFIG_SRCDIR(src/lisp.h)
85
AC_CONFIG_AUX_DIR(build-aux)
86
dnl automake 1.13 and later understand this, making -I m4 unnecessary.
Glenn Morris's avatar
Glenn Morris committed
87
dnl With older versions this is a no-op.
88
AC_CONFIG_MACRO_DIR(m4)
89 90 91 92

xcsdkdir=
AC_CHECK_PROGS(XCRUN, [xcrun])
if test -n "$XCRUN"; then
93 94 95 96 97 98 99
  if test -z "$MAKE"; then
    dnl Call the variable MAKE_PROG, not MAKE, to avoid confusion with
    dnl SET_MAKE and with the usual MAKE variable that 'make' itself uses.
    AC_CHECK_PROG([MAKE_PROG], [make], [yes])
    if test -z "$MAKE_PROG"; then
      MAKE="$XCRUN MAKE"
      export MAKE
100
      xcsdkdir=`$XCRUN --show-sdk-path 2>/dev/null`
101 102
    fi
  fi
103 104
fi

Glenn Morris's avatar
Glenn Morris committed
105 106
dnl Fairly arbitrary, older versions might work too.
AM_INIT_AUTOMAKE(1.11)
107 108 109 110 111 112 113 114 115 116

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'
117
standardlisppath='${lispdir}'
118 119
locallisppath='${datadir}/emacs/${version}/site-lisp:'\
'${datadir}/emacs/site-lisp'
120
lisppath='${locallisppath}:${standardlisppath}'
121 122
etcdir='${datadir}/emacs/${version}/etc'
archlibdir='${libexecdir}/emacs/${version}/${configuration}'
123
etcdocdir='${datadir}/emacs/${version}/etc'
124 125
gamedir='${localstatedir}/games/emacs'

126 127 128
dnl Special option to disable the most of other options.
AC_ARG_WITH(all,
[AS_HELP_STRING([--without-all],
129 130
		[omit almost all features and build
		small executable with minimal dependencies])],
131
  [with_features=$withval],
132
  [with_features=yes])
133

134 135 136 137 138 139 140 141 142 143 144 145 146 147 148
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
149
dnl Create a new --with option that defaults to $with_features.
150
dnl NAME is the base name of the option.  The shell variable with_NAME
151 152 153 154 155 156 157
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
158
   m4_bpatsubst([with_$1], [[^0-9a-z]], [_])=$with_features])dnl
159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203
])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.]))

204
AC_ARG_WITH([sound],[AS_HELP_STRING([--with-sound=VALUE],
205
  [compile with sound support (VALUE one of: yes, alsa, oss, bsd-ossaudio, no;
206 207
default yes).  Only for GNU/Linux, FreeBSD, NetBSD, MinGW.])],
  [ case "${withval}" in
208
      yes|no|alsa|oss|bsd-ossaudio) val=$withval ;;
209
      *) AC_MSG_ERROR([`--with-sound=$withval' is invalid;
210
this option's value should be `yes', `no', `alsa', `oss', or `bsd-ossaudio'.])
211 212 213 214 215
      ;;
    esac
    with_sound=$val
  ],
  [with_sound=$with_features])
216 217 218

dnl FIXME currently it is not the last.
dnl This should be the last --with option, because --with-x is
219
dnl added later on when we find the file name of X, and it's best to
220 221
dnl keep them together visually.
AC_ARG_WITH([x-toolkit],[AS_HELP_STRING([--with-x-toolkit=KIT],
222
 [use an X toolkit (KIT one of: yes or gtk, gtk2, gtk3, lucid or athena, motif, no)])],
223 224 225 226 227 228 229
[	  case "${withval}" in
	    y | ye | yes )	val=gtk ;;
	    n | no )		val=no  ;;
	    l | lu | luc | luci | lucid )	val=lucid ;;
	    a | at | ath | athe | athen | athena )	val=athena ;;
	    m | mo | mot | moti | motif )	val=motif ;;
	    g | gt | gtk  )	val=gtk ;;
230
	    gtk2  )	val=gtk2 ;;
231 232 233
	    gtk3  )	val=gtk3 ;;
	    * )
AC_MSG_ERROR([`--with-x-toolkit=$withval' is invalid;
234 235 236
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.])
237 238 239 240 241
	    ;;
	  esac
	  with_x_toolkit=$val
])

Paul Eggert's avatar
Paul Eggert committed
242 243 244 245 246
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

247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264
dnl _ON results in a '--without' option in the --help output, so
dnl the help text should refer to "don't compile", etc.
OPTION_DEFAULT_ON([xpm],[don't compile with XPM image support])
OPTION_DEFAULT_ON([jpeg],[don't compile with JPEG image support])
OPTION_DEFAULT_ON([tiff],[don't compile with TIFF image support])
OPTION_DEFAULT_ON([gif],[don't compile with GIF image support])
OPTION_DEFAULT_ON([png],[don't compile with PNG image support])
OPTION_DEFAULT_ON([rsvg],[don't compile with SVG image support])
OPTION_DEFAULT_ON([xml2],[don't compile with XML parsing support])
OPTION_DEFAULT_ON([imagemagick],[don't compile with ImageMagick image support])

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

OPTION_DEFAULT_ON([toolkit-scroll-bars],[don't use Motif or Xaw3d scroll bars])
OPTION_DEFAULT_ON([xaw3d],[don't use Xaw3d])
OPTION_DEFAULT_ON([xim],[don't use X11 XIM])
265
OPTION_DEFAULT_OFF([ns],[use NeXTstep (Cocoa or GNUstep) windowing system])
266
OPTION_DEFAULT_OFF([w32], [use native MS Windows GUI in a Cygwin build])
267 268 269 270

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])
271
OPTION_DEFAULT_ON([gsettings],[don't compile with GSettings support])
272 273
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
274
OPTION_DEFAULT_ON([zlib],[don't compile with zlib decompression support])
275 276 277 278 279 280 281 282 283 284 285

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'.
286 287
`yes' is a synonym for `w32' on MS-Windows, for `no' on Nextstep,
otherwise for the first of `gfile' or `inotify' that is usable.])
288 289 290 291
    ;;
   esac
   with_file_notification=$val
 ],
292
 [with_file_notification=$with_features])
293 294 295 296 297 298

## 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])

299
## This might be a 'configure' arg.
300 301
AC_SUBST([ACLOCAL_PATH])

302 303 304
## Makefile.in needs the cache file name.
AC_SUBST(cache_file)

305 306
## This is an option because I do not know if all info/man support
## compressed files, nor how to test if they do so.
307 308 309
OPTION_DEFAULT_ON([compress-install],
  [don't compress some files (.el, .info, etc.) when installing.  Equivalent to:
make GZIP_PROG= install])
310

311 312 313 314 315 316
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

317
AC_ARG_WITH([gnustep-conf],dnl
318 319
[AS_HELP_STRING([--with-gnustep-conf=FILENAME],
   [name of GNUstep.conf; default $GNUSTEP_CONFIG_FILE, or /etc/GNUstep/GNUstep.conf])])
320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346
test "X${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,
347
		 xmallocoverrun, conslist, glyphs])],
348 349 350 351 352 353 354 355 356 357 358 359
[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= ;
360
	                ac_gc_check_cons_list= ;
361
			ac_glyphs_debug= ;;
362 363 364 365 366
	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 ;
367
	                ac_gc_check_cons_list=1 ;
368
			ac_glyphs_debug=1 ;;
369 370 371 372 373 374
	# 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 ;;
375
	glyphs)		ac_glyphs_debug=1 ;;
376 377 378 379 380 381 382
	*)	AC_MSG_ERROR(unknown check category $check) ;;
	esac
done
IFS="$ac_save_IFS"

if test x$ac_enable_checking != x ; then
  AC_DEFINE(ENABLE_CHECKING, 1,
383
[Define to 1 if expensive run-time data type and consistency checks are enabled.])
384 385 386 387 388 389 390
fi
if test x$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
391
if test x$ac_gc_check_string_overrun != x ; then
392 393 394 395 396 397 398 399 400 401 402 403 404 405 406
  AC_DEFINE(GC_CHECK_STRING_OVERRUN, 1,
[Define this to check for short string overrun.])
fi
if test x$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
407
if test x$ac_glyphs_debug != x ; then
408 409 410
  AC_DEFINE(GLYPH_DEBUG, 1,
[Define this to enable glyphs debugging code.])
fi
411

412 413 414 415
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.])],
416
if test "${enableval}" != "no"; then
417 418
   AC_DEFINE(CHECK_LISP_OBJECT_TYPE, 1,
   [Define this to enable compile time checks for the Lisp_Object data type.])
419 420 421
fi)


422 423 424 425
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
426 427
AC_ARG_ENABLE(profiling,
[AS_HELP_STRING([--enable-profiling],
428 429 430
		[build emacs with low-level, gprof profiling support.
                Mainly useful for debugging Emacs itself.  May not work on
                all platforms.  Stops profiler.el working.])],
431 432 433 434 435 436 437 438 439 440 441
[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
442
 		 Requires gcc, enabled if found.])],
443 444
[ac_enable_autodepend="${enableval}"],[ac_enable_autodepend=yes])

445 446 447 448 449
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}"],[])

450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467
### Canonicalize the configuration name.

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

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

### If you add support for a new configuration, add code to this
### switch statement to recognize your configuration name and select
Glenn Morris's avatar
Glenn Morris committed
468 469
### the appropriate opsys.

470 471 472 473 474 475
### 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
476
opsys='' unported=no
477 478
case "${canonical}" in

479 480
  ## GNU/Linux and similar ports
  *-*-linux* )
481 482 483
    opsys=gnu-linux
  ;;

484 485 486 487 488
  ## FreeBSD ports
  *-*-freebsd* )
    opsys=freebsd
  ;;

489 490 491 492 493
  ## DragonFly ports
  *-*-dragonfly* )
    opsys=dragonfly
  ;;

494 495 496 497 498 499 500 501 502 503 504
  ## FreeBSD kernel + glibc based userland
  *-*-kfreebsd*gnu* )
    opsys=gnu-kfreebsd
  ;;

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

  ## OpenBSD ports
505
  *-*-openbsd* | *-*-mirbsd* )
506 507 508 509 510 511
    opsys=openbsd
  ;;

  ## Apple Darwin / Mac OS X
  *-apple-darwin* )
    case "${canonical}" in
Paul Eggert's avatar
Paul Eggert committed
512 513 514
      i[3456]86-* )  ;;
      powerpc-* )    ;;
      x86_64-* )     ;;
515 516 517
      * )            unported=yes ;;
    esac
    opsys=darwin
518 519 520 521 522 523
    ## Use fink packages if available.
    ## FIXME find a better way to do this: http://debbugs.gnu.org/11507
##    if test -d /sw/include && test -d /sw/lib; then
##      GCC_TEST_OPTIONS="-I/sw/include -L/sw/lib"
##      NON_GCC_TEST_OPTIONS=${GCC_TEST_OPTIONS}
##    fi
524 525
  ;;

526 527 528 529 530
  ## Cygwin ports
  *-*-cygwin )
    opsys=cygwin
  ;;

531 532
  ## HP 9000 series 700 and 800, running HP/UX
  hppa*-hp-hpux10.2* )
533
    opsys=hpux10-20
534 535
  ;;
  hppa*-hp-hpux1[1-9]* )
536
    opsys=hpux11
537 538 539 540 541
    CFLAGS="-D_INCLUDE__STDC_A1_SOURCE $CFLAGS"
  ;;

  ## IBM machines
  rs6000-ibm-aix4.[23]* )
Paul Eggert's avatar
Paul Eggert committed
542
    opsys=aix4-2
543 544
  ;;
  powerpc-ibm-aix4.[23]*  )
Paul Eggert's avatar
Paul Eggert committed
545
    opsys=aix4-2
546 547
  ;;
  rs6000-ibm-aix[56]* )
Paul Eggert's avatar
Paul Eggert committed
548
    opsys=aix4-2
549 550
  ;;
  powerpc-ibm-aix[56]*  )
Paul Eggert's avatar
Paul Eggert committed
551
    opsys=aix4-2
552 553 554 555 556
  ;;

  ## Silicon Graphics machines
  ## Iris 4D
  mips-sgi-irix6.5 )
557
    opsys=irix6-5
558 559 560 561 562 563 564 565 566 567 568
    # 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 "${canonical}" in
Paul Eggert's avatar
Paul Eggert committed
569 570 571
      i[3456]86-*-* )   ;;
      amd64-*-*|x86_64-*-*) ;;
      sparc* )		;;
572 573 574
      * )		unported=yes ;;
    esac
    case "${canonical}" in
575 576 577 578
      *-sunos5.[1-9][0-9]* | *-solaris2.[1-9][0-9]* )
		opsys=sol2-10
		emacs_check_sunpro_c=yes
		;;
579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603
      *-sunos5.6* | *-solaris2.6* )
		opsys=sol2-6
		RANLIB="ar -ts"
		;;
      *-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
604
      *-darwin* )               opsys=darwin ;;
605
      *-mingw32 )
606
		opsys=mingw32
607
		# MinGW overrides and adds some system headers in nt/inc.
608
		GCC_TEST_OPTIONS="-I $srcdir/nt/inc"
609
		;;
610 611 612
      *-sysv4.2uw* )	  	opsys=unixware ;;
      *-sysv5uw* )	  	opsys=unixware ;;
      *-sysv5OpenUNIX* )  	opsys=unixware ;;
613 614 615 616
      ## Otherwise, we'll fall through to the generic opsys code at the bottom.
    esac
  ;;

617 618 619 620 621 622 623 624 625 626 627 628
  # MinGW64
  x86_64-*-* )
    case "${canonical}" in
      *-mingw32 )
		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
  ;;

629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652
  * )
    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 $unported = yes; then
Glenn Morris's avatar
Glenn Morris committed
653
  AC_MSG_ERROR([Emacs does not support `${canonical}' systems.
Glenn Morris's avatar
Glenn Morris committed
654
If you think it should, please send a report to ${PACKAGE_BUGREPORT}.
655 656 657 658
Check `etc/MACHINES' for recognized configuration names.])
fi


Glenn Morris's avatar
Glenn Morris committed
659 660 661 662 663 664 665
AC_MSG_CHECKING([whether we are using GNU Make])
testval=`${MAKE-make} --version 2>/dev/null | grep 'GNU Make'`
if test "x$testval" != x; then
  AC_MSG_RESULT([yes])
else
  AC_MSG_RESULT([no])
  AC_MSG_ERROR([Building Emacs requires GNU make.
666 667
If you have it installed under another name, configure with 'MAKE=...'.
For example, run './configure MAKE=gmake'.])
Glenn Morris's avatar
Glenn Morris committed
668 669 670
fi


671
#### Choose a compiler.
672

673
dnl Sets GCC=yes if using gcc.
674
AC_PROG_CC([gcc cc cl clang "$XCRUN gcc" "$XCRUN clang"])
675
if test -n "$XCRUN"; then
676
  AC_CHECK_PROGS(AR, [ar "$XCRUN ar"])
677
  test -n "$AR" && export AR
678
fi
679

Paul Eggert's avatar
Paul Eggert committed
680 681
AM_PROG_CC_C_O

682 683 684 685 686 687
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

688 689 690 691 692
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"])

693 694
# Avoid gnulib's tests for -lcrypto, so that there's no static dependency on it.
AC_DEFUN([gl_CRYPTO_CHECK])
695 696
# Avoid gnulib's tests for HAVE_WORKING_O_NOATIME and HAVE_WORKING_O_NOFOLLOW,
# as we don't use them.
697
AC_DEFUN([gl_FCNTL_O_FLAGS])
698 699 700
# Avoid gnulib's threadlib module, as we do threads our own way.
AC_DEFUN([gl_THREADLIB])

701
# Initialize gnulib right after choosing the compiler.
Glenn Morris's avatar
Comment  
Glenn Morris committed
702
dnl Amongst other things, this sets AR and ARFLAGS.
703 704
gl_EARLY

705
if test "$ac_test_CFLAGS" != set; then
Paul Eggert's avatar
Paul Eggert committed
706 707 708
  # 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.
709 710 711 712 713 714 715 716 717 718 719 720 721 722 723
  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
724 725
	 [emacs_cv_prog_cc_g3=no])])
    if test $emacs_cv_prog_cc_g3 != yes; then
726 727
      CFLAGS=$emacs_save_CFLAGS
    fi
728 729 730
    if test $opsys = mingw32; then
      CFLAGS="$CFLAGS -gdwarf-2"
    fi
731
  fi
Paul Eggert's avatar
Paul Eggert committed
732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749

  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
750 751
fi

752 753
AC_ARG_ENABLE([gcc-warnings],
  [AS_HELP_STRING([--enable-gcc-warnings],
754
                  [turn on lots of GCC warnings/errors. This is intended for
755 756
		   developers, and may generate false alarms when used
		   with older or non-GNU development tools.])],
757 758 759 760 761 762 763 764
  [case $enableval in
     yes|no) ;;
     *)      AC_MSG_ERROR([bad value $enableval for gcc-warnings option]) ;;
   esac
   gl_gcc_warnings=$enableval],
  [gl_gcc_warnings=no]
)

765 766 767 768 769
# 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
770
	    error "not clang";
771 772 773 774 775
	  #endif
        ]])],
     [emacs_cv_clang=yes],
     [emacs_cv_clang=no])])

776 777 778 779
# When compiling with GCC, prefer -isystem to -I when including system
# include files, to avoid generating useless diagnostics for the files.
if test "$gl_gcc_warnings" != yes; then
  isystem='-I'
780 781 782 783 784 785 786
  if test "$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
787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806
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
  nw="$nw -Wlogical-op"             # any use of fwrite provokes this
807
  nw="$nw -Wformat-nonliteral"      # we do this a lot
808 809 810
  nw="$nw -Wvla"                    # warnings in gettext.h
  nw="$nw -Wnested-externs"         # use of XARGMATCH/verify_function__
  nw="$nw -Wswitch-default"         # Too many warnings for now
811
  nw="$nw -Winline"                 # OK to ignore 'inline'
812
  nw="$nw -Wjump-misses-init"       # We sometimes safely jump over init.
813 814
  nw="$nw -Wstrict-overflow"        # OK to optimize assuming that
                                    # signed overflow has undefined behavior
815 816
  nw="$nw -Wsync-nand"              # irrelevant here, and provokes ObjC warning
  nw="$nw -Wunsafe-loop-optimizations" # OK to suppress unsafe optimizations
817
  nw="$nw -Wbad-function-cast"      # These casts are no worse than others.
818 819 820 821 822

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

823 824 825
  # Emacs's use of alloca inhibits protecting the stack.
  nw="$nw -Wstack-protector"

826
  # The following line should be removable at some point.
827 828
  nw="$nw -Wsuggest-attribute=pure"

829 830 831 832 833 834 835
  # 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"

836 837 838 839
  if test $emacs_cv_clang = yes; then
    nw="$nw -Wcast-align"
  fi

840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855
  gl_MANYWARN_ALL_GCC([ws])
  gl_MANYWARN_COMPLEMENT([ws], [$ws], [$nw])
  for w in $ws; do
    gl_WARN_ADD([$w])
  done
  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])

  # In spite of excluding -Wlogical-op above, it is enabled, as of
  # gcc 4.5.0 20090517.
  gl_WARN_ADD([-Wno-logical-op])

856 857 858 859 860 861 862 863
  # 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

864
  AC_DEFINE([lint], [1], [Define to 1 if the compiler is checking for lint.])
865 866 867
  AH_VERBATIM([FORTIFY_SOURCE],
  [/* Enable compile-time and run-time bounds-checking, and some warnings,
      without upsetting glibc 2.15+. */
868
   #if !defined _FORTIFY_SOURCE && defined __OPTIMIZE__ && __OPTIMIZE__
869 870 871
   # define _FORTIFY_SOURCE 2
   #endif
  ])
872 873 874 875 876 877 878 879 880
  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])
881 882
fi

883 884 885 886 887 888 889
edit_cflags="
  s,///*,/,g
  s/^/ /
  s/ -I/ $isystem/g
  s/^ //
"

890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934
AC_ARG_ENABLE(link-time-optimization,
[AS_HELP_STRING([--enable-link-time-optimization],
                [build emacs with link-time optimization.
		 This is supported for gcc since 4.5.0 and clang.
		 Note that clang support is experimental - see INSTALL])],
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"
      fi
   fi
fi)
935

936 937 938 939 940 941 942
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
943 944 945 946 947 948 949 950 951 952 953 954 955 956


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'

957 958
dnl On MinGW, ensure we will call the MSYS /bin/ln.exe, not some
dnl random program in the current directory.
959 960
if (echo >conf$$.file) 2>/dev/null; then
  if ln -s conf$$.file conf$$ 2>/dev/null; then
961 962 963 964 965
    if test "$opsys" = "mingw32"; then
      LN_S_FILEONLY='/bin/ln -s'
    else
      LN_S_FILEONLY='ln -s'
    fi
966
  elif ln conf$$.file conf$$ 2>/dev/null; then
967 968 969 970 971
    if test "$opsys" = "mingw32"; then
      LN_S_FILEONLY=/bin/ln
    else
      LN_S_FILEONLY=ln
    fi
972 973 974 975 976 977 978 979 980 981 982 983 984
  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)

985

986 987 988 989 990 991
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.
992
if test "$opsys" = "mingw32"; then
Eli Zaretskii's avatar
Eli Zaretskii committed
993
  LN_S="/bin/ln"
994 995
fi

996 997
AC_PATH_PROG(INSTALL_INFO, install-info, :,
  $PATH$PATH_SEPARATOR/usr/sbin$PATH_SEPARATOR/sbin)
998 999 1000
dnl Don't use GZIP, which is used by gzip for additional parameters.
AC_PATH_PROG(GZIP_PROG, gzip)

1001
test $with_compress_install != yes && test -n "$GZIP_PROG" && \
1002 1003
   GZIP_PROG=" # $GZIP_PROG # (disabled by configure --without-compress-install)"

1004 1005 1006
if test $opsys = gnu-linux; then
  AC_PATH_PROG(PAXCTL, paxctl,,
    [$PATH$PATH_SEPARATOR/sbin$PATH_SEPARATOR/usr/sbin])
1007 1008 1009 1010 1011 1012
  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
1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025

  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
1026
      SETFATTR=
1027 1028 1029 1030
    fi
    rm -f conftest.tmp
    AC_SUBST([SETFATTR])
  fi
1031
fi
1032

1033
## Need makeinfo >= 4.7 (?) to build the manuals.
1034 1035 1036
AC_PATH_PROG(MAKEINFO, makeinfo, no)
dnl By this stage, configure has already checked for egrep and set EGREP,
dnl or exited with an error if no egrep was found.
1037 1038
if test "$MAKEINFO" != "no"; then
  case `
1039
    $MAKEINFO --version 2> /dev/null |
1040 1041 1042 1043
    $EGREP 'texinfo[[^0-9]]*([[1-4]][[0-9]]+|[[5-9]]|4\.[[7-9]]|4\.[[1-6]][[0-9]]+)'
  ` in
    '') MAKEINFO=no;;
  esac
1044 1045 1046 1047 1048 1049
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).
1050 1051
## 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
1052 1053
## should test for it as it does for any other build requirement.
## We use the presence of $srcdir/info/emacs to distinguish a release,
1054
## with pre-built manuals, from a repository checkout.
1055 1056
HAVE_MAKEINFO=yes

1057
if test "$MAKEINFO" = "no"; then
1058
  MAKEINFO=makeinfo
1059
  if test "x${with_makeinfo}" = "xno"; then
1060
    HAVE_MAKEINFO=no
1061
  elif test ! -e "$srcdir/info/emacs" && test ! -e "$srcdir/info/emacs.info"; then
1062
    AC_MSG_ERROR( [You do not seem to have makeinfo >= 4.7, and your
1063 1064 1065 1066 1067
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
1068
AC_SUBST(HAVE_MAKEINFO)
1069

1070 1071 1072 1073 1074 1075
dnl Just so that there is only a single place we need to edit.
INFO_EXT=.info
INFO_OPTS=--no-split
AC_SUBST(INFO_EXT)
AC_SUBST(INFO_OPTS)

1076
if test $opsys = mingw32; then
1077
   DOCMISC_W32=efaq-w32
1078
else
1079
   DOCMISC_W32=
1080
fi
1081
AC_SUBST(DOCMISC_W32)
1082

1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098
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.

1099 1100 1101 1102
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,
1103
dnl   http://bugs.debian.org/684788
1104 1105
dnl * unnecessary, since temacs is the only thing that actually needs it.
dnl   Indeed this is where it was originally, prior to:
1106
dnl   http://lists.gnu.org/archive/html/emacs-pretest-bug/2004-03/msg00170.html
1107
late_LDFLAGS="$LDFLAGS"
1108
if test x$GCC = xyes; then
1109
  LDFLAGS_NOCOMBRELOC="-Wl,-znocombreloc"
1110
else
1111
  LDFLAGS_NOCOMBRELOC="-znocombreloc"
1112 1113
fi

1114 1115
LDFLAGS="$LDFLAGS $LDFLAGS_NOCOMBRELOC"

1116 1117 1118
AC_MSG_CHECKING([for -znocombreloc])
AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])],
  [AC_MSG_RESULT(yes)],
1119
  LDFLAGS_NOCOMBRELOC=
1120 1121
  [AC_MSG_RESULT(no)])

1122
LDFLAGS="$late_LDFLAGS"
1123

1124 1125 1126 1127 1128 1129 1130 1131 1132
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
1133
	   error "Addresses are not sanitized.";
1134 1135 1136 1137 1138
	  #endif
	]])],
     [emacs_cv_sanitize_address=yes],
     [emacs_cv_sanitize_address=no])])

1139 1140
dnl The function dump-emacs will not be defined and temacs will do
dnl (load "loadup") automatically unless told otherwise.
1141
test "x$CANNOT_DUMP" = "x" && CANNOT_DUMP=no
1142
case "$opsys" in
1143
  your-opsys-here) CANNOT_DUMP=yes ;;
1144
esac
1145

1146
if test "$CANNOT_DUMP" = "yes"; then
1147
  AC_DEFINE(CANNOT_DUMP, 1, [Define if Emacs cannot be dumped on your system.])
1148 1149 1150
elif test "$emacs_cv_sanitize_address" = yes; then
  AC_MSG_WARN([[Addresses are sanitized; suggest CANNOT_DUMP=yes]])
fi
1151

1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169
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
   ;;
1170 1171 1172
  mingw32)
   UNEXEC_OBJ=unexw32.o
   ;;
1173 1174 1175 1176 1177
  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
1178
   #
1179 1180 1181
   # 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
1182
   #
1183 1184 1185 1186 1187 1188 1189 1190
   # 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
1191
  freebsd|dragonfly)
1192 1193 1194
   ## 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.
1195 1196 1197
### It's not our place to do this.  See bug#10313#17.
###   LD_SWITCH_SYSTEM=-L/usr/local/lib
      :
1198 1199 1200 1201
   ;;

  gnu-linux)
   ## cpp test was "ifdef __mips__", but presumably this is equivalent...
1202
   case $host_cpu in mips*) LD_SWITCH_SYSTEM="-G 0";; esac
1203 1204 1205
   ;;

  netbsd)
1206 1207 1208
### It's not our place to do this.  See bug#10313#17.
###   LD_SWITCH_SYSTEM="-Wl,-rpath,/usr/pkg/lib -L/usr/pkg/lib -Wl,-rpath,/usr/local/lib -L/usr/local/lib"
      :
1209 1210 1211
   ;;

  openbsd)
1212
   ## Han Boetes <han@boetes.org> says this is necessary,
1213 1214 1215 1216 1217 1218 1219 1220
   ## otherwise Emacs dumps core on elf systems.
   LD_SWITCH_SYSTEM="-Z"
   ;;
esac
AC_SUBST(LD_SWITCH_SYSTEM)

ac_link="$ac_link $LD_SWITCH_SYSTEM"

1221
## This setting of LD_SWITCH_SYSTEM references LD_SWITCH_X_SITE_RPATH,
1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232
## which has not been defined yet.  When this was handled with cpp,
## it was expanded to null when configure sourced the s/*.h file.
## Thus LD_SWITCH_SYSTEM had different values in configure and the Makefiles.
## FIXME it would be cleaner to put this in LD_SWITCH_SYSTEM_TEMACS
## (or somesuch), but because it is supposed to go at the _front_
## of LD_SWITCH_SYSTEM, we cannot do that in exactly the same way.
## Compare with the gnu-linux case below, which added to the end
## of LD_SWITCH_SYSTEM, and so can instead go at the front of
## LD_SWITCH_SYSTEM_TEMACS.
case "$opsys" in
  netbsd|openbsd)
1233
   LD_SWITCH_SYSTEM="\$(LD_SWITCH_X_SITE_RPATH) $LD_SWITCH_SYSTEM" ;;
1234 1235 1236 1237
esac


C_SWITCH_MACHINE=
Paul Eggert's avatar
Paul Eggert committed
1238 1239
case $canonical in
 alpha*)
1240 1241 1242 1243 1244 1245 1246 1247 1248 1249
  AC_CHECK_DECL([__ELF__])
  if test "$ac_cv_have_decl___ELF__" = "yes"; then
    ## With ELF, make sure that all common symbols get allocated to in the
    ## data section.  Otherwise, the dump of temacs may miss variables in
    ## the shared library that have been initialized.  For example, with
    ## GNU libc, __malloc_initialized would normally be resolved to the
    ## shared library's .bss section, which is fatal.
    if test "x$GCC" = "xyes"; then
      C_SWITCH_MACHINE="-fno-common"
    else
1250
      AC_MSG_ERROR([Non-GCC compilers are not supported.])
1251 1252
    fi
  else
1253 1254 1255 1256
      dnl This was the unexalpha.c case.  Removed in 24.1, 2010-07-24,
      dnl albeit under the mistaken assumption that said file
      dnl was no longer used.
      AC_MSG_ERROR([Non-ELF systems are not supported since Emacs 24.1.])
1257
  fi
Paul Eggert's avatar
Paul Eggert committed
1258 1259
  ;;
esac
1260 1261 1262 1263 1264 1265 1266 1267 1268 1269
AC_SUBST(C_SWITCH_MACHINE)

AC_SUBST(UNEXEC_OBJ)

C_SWITCH_SYSTEM=
## Some programs in src produce warnings saying certain subprograms
## are too complex and need a MAXMEM value greater than 2000 for
## additional optimization.  --nils@exp-math.uni-essen.de
test "$opsys" = "aix4.2" && test "x$GCC" != "xyes" && \
  C_SWITCH_SYSTEM="-ma -qmaxmem=4000"
1270 1271 1272 1273 1274 1275
if test "$opsys" = "mingw32"; then
  case "$canonical" in
    x86_64-*-mingw32) C_SWITCH_SYSTEM="-mtune=generic" ;;
    *) C_SWITCH_SYSTEM="-mtune=pentium4" ;;
  esac
fi
1276 1277 1278 1279 1280 1281