configure.ac 169 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, 1999-2013 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)
Chong Yidong's avatar
Chong Yidong committed
25
AC_INIT(emacs, 24.3.50)
26

27 28 29 30 31 32
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=
33 34
dnl This is the documented way to record the args passed to configure,
dnl rather than $ac_configure_args.
35 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
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=' '
64 65
done

66 67
AC_CONFIG_HEADER(src/config.h:src/config.in)
AC_CONFIG_SRCDIR(src/lisp.h)
68
AC_CONFIG_AUX_DIR(build-aux)
Glenn Morris's avatar
Glenn Morris committed
69 70
dnl Fairly arbitrary, older versions might work too.
AM_INIT_AUTOMAKE(1.11)
71 72 73 74 75

dnl Support for --program-prefix, --program-suffix and
dnl --program-transform-name options
AC_ARG_PROGRAM

76
dnl http://debbugs.gnu.org/15260
77
dnl Note that abs_srcdir and abs_builddir are not yet defined. :(
78

79
dnl "`cd \"$srcdir\"`" is not portable.
80 81 82 83 84
dnl See autoconf manual "Shell Substitutions":
dnl "There is just no portable way to use double-quoted strings inside
dnl double-quoted back-quoted expressions (pfew!)."
temp_srcdir=`cd "$srcdir"; pwd`

85
for var in "`pwd`" "$temp_srcdir"; do
86 87 88

  dnl configure sets LC_ALL=C early on, so this range should work.
  case "$var" in
89
    *[[^\ -~]]*) AC_MSG_ERROR([Emacs cannot be built in a directory whose name contains non-ASCII characters: $var]) ;;
90 91 92 93
  esac

done

94 95 96 97 98
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'
99
leimdir='${datadir}/emacs/${version}/leim'
100
standardlisppath='${lispdir}:${leimdir}'
101 102
locallisppath='${datadir}/emacs/${version}/site-lisp:'\
'${datadir}/emacs/site-lisp'
103
lisppath='${locallisppath}:${standardlisppath}'
104 105
etcdir='${datadir}/emacs/${version}/etc'
archlibdir='${libexecdir}/emacs/${version}/${configuration}'
106
etcdocdir='${datadir}/emacs/${version}/etc'
107 108
gamedir='${localstatedir}/games/emacs'

109 110 111
dnl Special option to disable the most of other options.
AC_ARG_WITH(all,
[AS_HELP_STRING([--without-all],
112 113
		[omit almost all features and build
		small executable with minimal dependencies])],
114 115
  with_features=$withval,
  with_features=yes)
116

117 118 119 120 121 122 123 124 125 126 127 128 129 130 131
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
132
dnl Create a new --with option that defaults to $with_features.
133
dnl NAME is the base name of the option.  The shell variable with_NAME
134 135 136 137 138 139 140
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
141
   m4_bpatsubst([with_$1], [[^0-9a-z]], [_])=$with_features])dnl
142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186
])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.]))

187
AC_ARG_WITH([sound],[AS_HELP_STRING([--with-sound=VALUE],
188
  [compile with sound support (VALUE one of: yes, alsa, oss, bsd-ossaudio, no;
189 190
default yes).  Only for GNU/Linux, FreeBSD, NetBSD, MinGW.])],
  [ case "${withval}" in
191
      yes|no|alsa|oss|bsd-ossaudio) val=$withval ;;
192
      *) AC_MSG_ERROR([`--with-sound=$withval' is invalid;
193
this option's value should be `yes', `no', `alsa', `oss', or `bsd-ossaudio'.])
194 195 196 197 198
      ;;
    esac
    with_sound=$val
  ],
  [with_sound=$with_features])
199 200 201

dnl FIXME currently it is not the last.
dnl This should be the last --with option, because --with-x is
202
dnl added later on when we find the file name of X, and it's best to
203 204
dnl keep them together visually.
AC_ARG_WITH([x-toolkit],[AS_HELP_STRING([--with-x-toolkit=KIT],
205
 [use an X toolkit (KIT one of: yes or gtk, gtk2, gtk3, lucid or athena, motif, no)])],
206 207 208 209 210 211 212
[	  case "${withval}" in
	    y | ye | yes )	val=gtk ;;
	    n | no )		val=no  ;;
	    l | lu | luc | luci | lucid )	val=lucid ;;
	    a | at | ath | athe | athen | athena )	val=athena ;;
	    m | mo | mot | moti | motif )	val=motif ;;
	    g | gt | gtk  )	val=gtk ;;
213
	    gtk2  )	val=gtk2 ;;
214 215 216
	    gtk3  )	val=gtk3 ;;
	    * )
AC_MSG_ERROR([`--with-x-toolkit=$withval' is invalid;
217 218 219
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.])
220 221 222 223 224
	    ;;
	  esac
	  with_x_toolkit=$val
])

Paul Eggert's avatar
Paul Eggert committed
225 226 227 228 229
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

230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247
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])
248
OPTION_DEFAULT_OFF([ns],[use NeXTstep (Cocoa or GNUstep) windowing system])
249
OPTION_DEFAULT_OFF([w32], [use native MS Windows GUI in a Cygwin build])
250 251 252 253

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])
254
OPTION_DEFAULT_ON([gsettings],[don't compile with GSettings support])
255 256
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
257
OPTION_DEFAULT_ON([zlib],[don't compile with zlib decompression support])
258 259 260 261 262 263 264 265 266 267 268

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'.
269 270
`yes' is a synonym for `w32' on MS-Windows, for `no' on Nextstep,
otherwise for the first of `gfile' or `inotify' that is usable.])
271 272 273 274
    ;;
   esac
   with_file_notification=$val
 ],
275
 [with_file_notification=$with_features])
276 277 278 279 280 281

## 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])

282 283 284
## Makefile.in needs the cache file name.
AC_SUBST(cache_file)

285 286
## This is an option because I do not know if all info/man support
## compressed files, nor how to test if they do so.
287 288 289
OPTION_DEFAULT_ON([compress-install],
  [don't compress some files (.el, .info, etc.) when installing.  Equivalent to:
make GZIP_PROG= install])
290 291

AC_ARG_WITH([pkg-config-prog],dnl
292 293
[AS_HELP_STRING([--with-pkg-config-prog=FILENAME],
                  [file name of pkg-config for finding GTK and librsvg])])
294 295 296 297 298 299
if test "X${with_pkg_config_prog}" != X; then
   if test "${with_pkg_config_prog}" != yes; then
      PKG_CONFIG="${with_pkg_config_prog}"
   fi
fi

300 301 302 303 304 305
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

306
AC_ARG_WITH([gnustep-conf],dnl
307 308
[AS_HELP_STRING([--with-gnustep-conf=FILENAME],
   [name of GNUstep.conf; default $GNUSTEP_CONFIG_FILE, or /etc/GNUstep/GNUstep.conf])])
309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335
test "X${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,
336
		 xmallocoverrun, conslist, glyphs])],
337 338 339 340 341 342 343 344 345 346 347 348
[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= ;
349
	                ac_gc_check_cons_list= ;
350
			ac_glyphs_debug= ;;
351 352 353 354 355
	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 ;
356
	                ac_gc_check_cons_list=1 ;
357
			ac_glyphs_debug=1 ;;
358 359 360 361 362 363
	# 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 ;;
364
	glyphs)		ac_glyphs_debug=1 ;;
365 366 367 368 369 370 371
	*)	AC_MSG_ERROR(unknown check category $check) ;;
	esac
done
IFS="$ac_save_IFS"

if test x$ac_enable_checking != x ; then
  AC_DEFINE(ENABLE_CHECKING, 1,
372
[Define to 1 if expensive run-time data type and consistency checks are enabled.])
373 374 375 376 377 378 379
fi
if test x$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
380
if test x$ac_gc_check_string_overrun != x ; then
381 382 383 384 385 386 387 388 389 390 391 392 393 394 395
  AC_DEFINE(GC_CHECK_STRING_OVERRUN, 1,
[Define this to check for short string overrun.])
fi
if test x$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
396
if test x$ac_glyphs_debug != x ; then
397 398 399
  AC_DEFINE(GLYPH_DEBUG, 1,
[Define this to enable glyphs debugging code.])
fi
400

401 402 403 404
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.])],
405
if test "${enableval}" != "no"; then
406 407
   AC_DEFINE(CHECK_LISP_OBJECT_TYPE, 1,
   [Define this to enable compile time checks for the Lisp_Object data type.])
408 409 410
fi)


411 412 413 414
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
415 416
AC_ARG_ENABLE(profiling,
[AS_HELP_STRING([--enable-profiling],
417 418 419
		[build emacs with low-level, gprof profiling support.
                Mainly useful for debugging Emacs itself.  May not work on
                all platforms.  Stops profiler.el working.])],
420 421 422 423 424 425 426 427 428 429 430 431 432 433 434
[ac_enable_profiling="${enableval}"],[])
if test x$ac_enable_profiling != x ; then
   PROFILING_CFLAGS="-DPROFILING=1 -pg"
else
   PROFILING_CFLAGS=
fi
AC_SUBST(PROFILING_CFLAGS)

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

435 436 437 438 439
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}"],[])

440 441 442 443 444 445 446 447 448
#### When building with MinGW inside the MSYS tree, 'pwd' produces
#### directories relative to the root of the MSYS tree,
#### e.g. '/home/user/foo' instead of '/d/MSYS/home/user/foo'.  When
#### such a value of srcdir is written to the top-level Makefile, it
#### gets propagated to src/epaths.h, and that causes temacs to fail,
#### because, being a MinGW program that knows nothing of MSYS root
#### substitution, it cannot find the data directory.  "pwd -W"
#### produces Windows-style 'd:/foo/bar' absolute directory names, so
#### we use it here to countermand that lossage.
449
test "$MSYSTEM" = "MINGW32" && abs_srcdir=`(cd "$abs_srcdir"; pwd -W | sed -e 's,^\([[A-Za-z]]\):,/\1,')`
450

451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468
### 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
Paul Eggert's avatar
Paul Eggert committed
469
### the appropriate operating system file.
470

Paul Eggert's avatar
Paul Eggert committed
471
### You would hope that you could choose an s/*.h
472
### file based on the operating system portion.  However, it turns out
Paul Eggert's avatar
Paul Eggert committed
473
### that each s/*.h file is pretty manufacturer-specific.
474 475 476 477 478 479 480 481 482
### So we basically have to have a special case for each
### configuration name.
###
### As far as handling version numbers on operating systems is
### concerned, make sure things will fail in a fixable way.  If
### /etc/MACHINES doesn't say anything about version numbers, be
### prepared to handle anything reasonably.  If version numbers
### matter, be sure /etc/MACHINES says something about it.

Paul Eggert's avatar
Paul Eggert committed
483
opsys='' unported=no
484 485
case "${canonical}" in

486 487
  ## GNU/Linux and similar ports
  *-*-linux* )
488 489 490
    opsys=gnu-linux
  ;;

491 492 493 494 495
  ## FreeBSD ports
  *-*-freebsd* )
    opsys=freebsd
  ;;

496 497 498 499 500
  ## DragonFly ports
  *-*-dragonfly* )
    opsys=dragonfly
  ;;

501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518
  ## FreeBSD kernel + glibc based userland
  *-*-kfreebsd*gnu* )
    opsys=gnu-kfreebsd
  ;;

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

  ## OpenBSD ports
  *-*-openbsd* )
    opsys=openbsd
  ;;

  ## Apple Darwin / Mac OS X
  *-apple-darwin* )
    case "${canonical}" in
Paul Eggert's avatar
Paul Eggert committed
519 520 521
      i[3456]86-* )  ;;
      powerpc-* )    ;;
      x86_64-* )     ;;
522 523 524
      * )            unported=yes ;;
    esac
    opsys=darwin
525 526 527 528 529 530
    ## Use fink packages if available.
    ## FIXME find a better way to do this: http://debbugs.gnu.org/11507
##    if test -d /sw/include && test -d /sw/lib; then
##      GCC_TEST_OPTIONS="-I/sw/include -L/sw/lib"
##      NON_GCC_TEST_OPTIONS=${GCC_TEST_OPTIONS}
##    fi
531 532
  ;;

533 534 535 536 537
  ## Cygwin ports
  *-*-cygwin )
    opsys=cygwin
  ;;

538 539
  ## HP 9000 series 700 and 800, running HP/UX
  hppa*-hp-hpux10.2* )
540
    opsys=hpux10-20
541 542
  ;;
  hppa*-hp-hpux1[1-9]* )
543
    opsys=hpux11
544 545 546 547 548
    CFLAGS="-D_INCLUDE__STDC_A1_SOURCE $CFLAGS"
  ;;

  ## IBM machines
  rs6000-ibm-aix4.[23]* )
Paul Eggert's avatar
Paul Eggert committed
549
    opsys=aix4-2
550 551
  ;;
  powerpc-ibm-aix4.[23]*  )
Paul Eggert's avatar
Paul Eggert committed
552
    opsys=aix4-2
553 554
  ;;
  rs6000-ibm-aix[56]* )
Paul Eggert's avatar
Paul Eggert committed
555
    opsys=aix4-2
556 557
  ;;
  powerpc-ibm-aix[56]*  )
Paul Eggert's avatar
Paul Eggert committed
558
    opsys=aix4-2
559 560 561 562 563
  ;;

  ## Silicon Graphics machines
  ## Iris 4D
  mips-sgi-irix6.5 )
564
    opsys=irix6-5
565 566 567 568 569 570 571 572 573 574 575
    # 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 "${canonical}" in
Paul Eggert's avatar
Paul Eggert committed
576 577 578
      i[3456]86-*-* )   ;;
      amd64-*-*|x86_64-*-*) ;;
      sparc* )		;;
579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610
      * )		unported=yes ;;
    esac
    case "${canonical}" in
      *-sunos5.6* | *-solaris2.6* )
		opsys=sol2-6
		RANLIB="ar -ts"
		;;
      *-sunos5.[7-9]* | *-solaris2.[7-9]* )
		opsys=sol2-6
		emacs_check_sunpro_c=yes
		;;
      *-sunos5* | *-solaris* )
		opsys=sol2-10
		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
611
      *-darwin* )               opsys=darwin ;;
612
      *-mingw32 )
613
		opsys=mingw32
614
		# MinGW overrides and adds some system headers in nt/inc.
615
		GCC_TEST_OPTIONS="-I $srcdir/nt/inc"
616
		;;
617 618 619
      *-sysv4.2uw* )	  	opsys=unixware ;;
      *-sysv5uw* )	  	opsys=unixware ;;
      *-sysv5OpenUNIX* )  	opsys=unixware ;;
620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653
      ## Otherwise, we'll fall through to the generic opsys code at the bottom.
    esac
  ;;

  * )
    unported=yes
  ;;
esac

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

]
dnl quotation ends

if test $unported = yes; then
  AC_MSG_ERROR([Emacs hasn't been ported to `${canonical}' systems.
Check `etc/MACHINES' for recognized configuration names.])
fi


#### Choose a compiler.
654

655 656
dnl Sets GCC=yes if using gcc.
AC_PROG_CC
Paul Eggert's avatar
Paul Eggert committed
657 658
AM_PROG_CC_C_O

659 660 661 662 663 664
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

665 666 667 668 669
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"])

670 671
# Avoid gnulib's tests for HAVE_WORKING_O_NOATIME and HAVE_WORKING_O_NOFOLLOW,
# as we don't use them.
672
AC_DEFUN([gl_FCNTL_O_FLAGS])
673 674 675
# Avoid gnulib's threadlib module, as we do threads our own way.
AC_DEFUN([gl_THREADLIB])

676
# Initialize gnulib right after choosing the compiler.
Glenn Morris's avatar
Comment  
Glenn Morris committed
677
dnl Amongst other things, this sets AR and ARFLAGS.
678 679
gl_EARLY

680
if test "$ac_test_CFLAGS" != set; then
Paul Eggert's avatar
Paul Eggert committed
681 682 683
  # 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.
684 685 686 687 688 689 690 691 692 693 694 695 696 697 698
  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
699 700
	 [emacs_cv_prog_cc_g3=no])])
    if test $emacs_cv_prog_cc_g3 != yes; then
701 702
      CFLAGS=$emacs_save_CFLAGS
    fi
703 704 705
    if test $opsys = mingw32; then
      CFLAGS="$CFLAGS -gdwarf-2"
    fi
706
  fi
Paul Eggert's avatar
Paul Eggert committed
707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724

  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
725 726
fi

727 728
AC_ARG_ENABLE([gcc-warnings],
  [AS_HELP_STRING([--enable-gcc-warnings],
729
                  [turn on lots of GCC warnings/errors. This is intended for
730 731
		   developers, and may generate false alarms when used
		   with older or non-GNU development tools.])],
732 733 734 735 736 737 738 739
  [case $enableval in
     yes|no) ;;
     *)      AC_MSG_ERROR([bad value $enableval for gcc-warnings option]) ;;
   esac
   gl_gcc_warnings=$enableval],
  [gl_gcc_warnings=no]
)

740 741 742 743 744 745 746 747 748 749 750 751 752
AC_ARG_ENABLE(link-time-optimization,
[AS_HELP_STRING([--enable-link-time-optimization],
                [build emacs with link-time optimization.
                 This is supported only for GCC since 4.5.0.])],
if test "${enableval}" != "no"; then
   AC_MSG_CHECKING([whether link-time optimization is supported])
   ac_lto_supported=no
   if test x$GCC = xyes; then
      CPUS=`getconf _NPROCESSORS_ONLN 2>/dev/null`
      if test x$CPUS != x; then
      	 LTO="-flto=$CPUS"
      else
	 LTO="-flto"
753
      fi
754 755 756 757 758 759 760 761 762 763 764 765
      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"
   fi
fi)

766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783
# gl_GCC_VERSION_IFELSE([major], [minor], [run-if-found], [run-if-not-found])
# ------------------------------------------------
# If $CPP is gcc-MAJOR.MINOR or newer, then run RUN-IF-FOUND.
# Otherwise, run RUN-IF-NOT-FOUND.
AC_DEFUN([gl_GCC_VERSION_IFELSE],
  [AC_PREPROC_IFELSE(
    [AC_LANG_PROGRAM(
      [[
#if ($1) < __GNUC__ || (($1) == __GNUC__ && ($2) <= __GNUC_MINOR__)
/* ok */
#else
# error "your version of gcc is older than $1.$2"
#endif
      ]]),
    ], [$3], [$4])
  ]
)

784 785 786 787 788 789 790 791 792 793 794
# 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__
	    #error "not clang"
	  #endif
        ]])],
     [emacs_cv_clang=yes],
     [emacs_cv_clang=no])])

795 796 797 798
# When compiling with GCC, prefer -isystem to -I when including system
# include files, to avoid generating useless diagnostics for the files.
if test "$gl_gcc_warnings" != yes; then
  isystem='-I'
799 800 801 802 803 804 805
  if test "$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
806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825
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="$nw -Wlogical-op"             # any use of fwrite provokes this
826
  nw="$nw -Wformat-nonliteral"      # we do this a lot
827 828 829
  nw="$nw -Wvla"                    # warnings in gettext.h
  nw="$nw -Wnested-externs"         # use of XARGMATCH/verify_function__
  nw="$nw -Wswitch-default"         # Too many warnings for now
830
  nw="$nw -Winline"                 # OK to ignore 'inline'
831
  nw="$nw -Wjump-misses-init"       # We sometimes safely jump over init.
832 833
  nw="$nw -Wstrict-overflow"        # OK to optimize assuming that
                                    # signed overflow has undefined behavior
834 835
  nw="$nw -Wsync-nand"              # irrelevant here, and provokes ObjC warning
  nw="$nw -Wunsafe-loop-optimizations" # OK to suppress unsafe optimizations
836
  nw="$nw -Wbad-function-cast"      # These casts are no worse than others.
837 838 839 840 841

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

842 843 844
  # Emacs's use of alloca inhibits protecting the stack.
  nw="$nw -Wstack-protector"

845
  # The following line should be removable at some point.
846 847
  nw="$nw -Wsuggest-attribute=pure"

848 849 850 851 852 853 854
  # 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"

855 856 857 858
  if test $emacs_cv_clang = yes; then
    nw="$nw -Wcast-align"
  fi

859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874
  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])

875 876 877 878 879 880 881 882
  # 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

883
  AC_DEFINE([lint], [1], [Define to 1 if the compiler is checking for lint.])
884 885 886
  AH_VERBATIM([FORTIFY_SOURCE],
  [/* Enable compile-time and run-time bounds-checking, and some warnings,
      without upsetting glibc 2.15+. */
887
   #if !defined _FORTIFY_SOURCE && defined __OPTIMIZE__ && __OPTIMIZE__
888 889 890
   # define _FORTIFY_SOURCE 2
   #endif
  ])
891 892 893 894 895 896 897 898 899
  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])
900 901 902 903
fi



904 905 906 907 908 909 910
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
911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942


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'

if (echo >conf$$.file) 2>/dev/null; then
  if ln -s conf$$.file conf$$ 2>/dev/null; then
    LN_S_FILEONLY='ln -s'
  elif ln conf$$.file conf$$ 2>/dev/null; then
    LN_S_FILEONLY=ln
  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)

943

944 945 946 947 948 949
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.
950
if test "$opsys" = "mingw32"; then
951
  LN_S="ln"
952 953
fi

954 955
AC_PATH_PROG(INSTALL_INFO, install-info, :,
  $PATH$PATH_SEPARATOR/usr/sbin$PATH_SEPARATOR/sbin)
956 957 958
dnl Don't use GZIP, which is used by gzip for additional parameters.
AC_PATH_PROG(GZIP_PROG, gzip)

959
test $with_compress_install != yes && test -n "$GZIP_PROG" && \
960 961
   GZIP_PROG=" # $GZIP_PROG # (disabled by configure --without-compress-install)"

962 963 964
if test $opsys = gnu-linux; then
  AC_PATH_PROG(PAXCTL, paxctl,,
    [$PATH$PATH_SEPARATOR/sbin$PATH_SEPARATOR/usr/sbin])
965 966 967 968 969 970
  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
971
fi
972

973
## Need makeinfo >= 4.7 (?) to build the manuals.
974 975 976
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.
977 978
if test "$MAKEINFO" != "no"; then
  case `
979
    $MAKEINFO --version 2> /dev/null |
980 981 982 983
    $EGREP 'texinfo[[^0-9]]*([[1-4]][[0-9]]+|[[5-9]]|4\.[[7-9]]|4\.[[1-6]][[0-9]]+)'
  ` in
    '') MAKEINFO=no;;
  esac
984 985 986 987 988 989 990 991 992 993 994
fi

## Makeinfo is unusual.  For a released Emacs, the manuals are
## pre-built, and not deleted by the normal clean rules.  makeinfo is
## therefore in the category of "special tools" not normally required, which
## configure does not have to check for (eg autoconf itself).
## In a Bazaar checkout on the other hand, the manuals are not included.
## So makeinfo is a requirement to build from Bazaar, and configure
## should test for it as it does for any other build requirement.
## We use the presence of $srcdir/info/emacs to distinguish a release,
## with pre-built manuals, from a Bazaar checkout.
995 996
HAVE_MAKEINFO=yes

997
if test "$MAKEINFO" = "no"; then
998
  MAKEINFO=makeinfo
999
  if test "x${with_makeinfo}" = "xno"; then
1000
    HAVE_MAKEINFO=no
1001
  elif test ! -e "$srcdir/info/emacs" && test ! -e "$srcdir/info/emacs.info"; then
1002
    AC_MSG_ERROR( [You do not seem to have makeinfo >= 4.7, and your
1003 1004 1005 1006 1007
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
1008
AC_SUBST(HAVE_MAKEINFO)
1009

1010 1011 1012 1013 1014 1015
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)

1016
if test $opsys = mingw32; then
1017
   DOCMISC_W32=efaq-w32
1018
else
1019
   DOCMISC_W32=
1020
fi
1021
AC_SUBST(DOCMISC_W32)
1022

1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038
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.

1039 1040 1041 1042
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,
1043
dnl   http://bugs.debian.org/684788
1044 1045
dnl * unnecessary, since temacs is the only thing that actually needs it.
dnl   Indeed this is where it was originally, prior to:
1046
dnl   http://lists.gnu.org/archive/html/emacs-pretest-bug/2004-03/msg00170.html
1047
late_LDFLAGS="$LDFLAGS"
1048
if test x$GCC = xyes; then
1049
  LDFLAGS_NOCOMBRELOC="-Wl,-znocombreloc"
1050
else
1051
  LDFLAGS_NOCOMBRELOC="-znocombreloc"
1052 1053
fi

1054 1055
LDFLAGS="$LDFLAGS $LDFLAGS_NOCOMBRELOC"

1056 1057 1058
AC_MSG_CHECKING([for -znocombreloc])
AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])],
  [AC_MSG_RESULT(yes)],
1059
  LDFLAGS_NOCOMBRELOC=
1060 1061
  [AC_MSG_RESULT(no)])

1062
LDFLAGS="$late_LDFLAGS"
1063 1064 1065

dnl The function dump-emacs will not be defined and temacs will do
dnl (load "loadup") automatically unless told otherwise.
1066
test "x$CANNOT_DUMP" = "x" && CANNOT_DUMP=no
1067
case "$opsys" in
1068
  your-opsys-here) CANNOT_DUMP=yes ;;
1069
esac
1070 1071 1072 1073

test "$CANNOT_DUMP" = "yes" && \
  AC_DEFINE(CANNOT_DUMP, 1, [Define if Emacs cannot be dumped on your system.])

1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091
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
   ;;
1092 1093 1094
  mingw32)
   UNEXEC_OBJ=unexw32.o
   ;;
1095 1096 1097 1098 1099
  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
1100
   #
1101 1102 1103
   # 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
1104
   #
1105 1106 1107 1108 1109 1110 1111 1112
   # 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
1113
  freebsd|dragonfly)
1114 1115 1116
   ## 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.
1117 1118 1119
### It's not our place to do this.  See bug#10313#17.
###   LD_SWITCH_SYSTEM=-L/usr/local/lib
      :
1120 1121 1122 1123
   ;;

  gnu-linux)
   ## cpp test was "ifdef __mips__", but presumably this is equivalent...
1124
   case $host_cpu in mips*) LD_SWITCH_SYSTEM="-G 0";; esac
1125 1126 1127
   ;;

  netbsd)
1128 1129 1130
### 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"
      :
1131 1132 1133
   ;;

  openbsd)
1134
   ## Han Boetes <han@boetes.org> says this is necessary,
1135 1136 1137 1138 1139 1140 1141 1142
   ## otherwise Emacs dumps core on elf systems.
   LD_SWITCH_SYSTEM="-Z"
   ;;
esac
AC_SUBST(LD_SWITCH_SYSTEM)

ac_link="$ac_link $LD_SWITCH_SYSTEM"

1143
## This setting of LD_SWITCH_SYSTEM references LD_SWITCH_X_SITE_RPATH,
1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154
## 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)
1155
   LD_SWITCH_SYSTEM="\$(LD_SWITCH_X_SITE_RPATH) $LD_SWITCH_SYSTEM" ;;
1156 1157 1158 1159
esac


C_SWITCH_MACHINE=
Paul Eggert's avatar
Paul Eggert committed
1160 1161
case $canonical in
 alpha*)
1162 1163 1164 1165 1166 1167 1168 1169 1170 1171
  AC_CHECK_DECL([__ELF__])
  if test "$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
1172
      AC_MSG_ERROR([Non-GCC compilers are not supported.])
1173 1174
    fi
  else
1175 1176 1177 1178
      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.])
1179
  fi
Paul Eggert's avatar
Paul Eggert committed
1180 1181
  ;;
esac
1182 1183 1184 1185 1186 1187 1188 1189 1190 1191
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"
1192
test "$opsys" = "mingw32" && C_SWITCH_SYSTEM="-mtune=pentium4"
1193 1194 1195 1196 1197 1198 1199 1200 1201 1202
## gnu-linux might need -D_BSD_SOURCE on old libc5 systems.
## It is redundant in glibc2, since we define _GNU_SOURCE.
AC_SUBST(C_SWITCH_SYSTEM)


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

1203
  freebsd|dragonfly) LIBS_SYSTEM="-lutil" ;;
1204 1205 1206

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

1207
  sol2*) LIBS_SYSTEM="-lsocket -lnsl" ;;
1208 1209 1210 1211 1212

  ## Motif needs -lgen.
  unixware) LIBS_SYSTEM="-lsocket -lnsl -lelf -lgen" ;;
esac

1213
AC_SUBST(LIBS_SYSTEM)
1214 1215 1216 1217 1218 1219 1220 1221 1222

### Make sure subsequent tests use flags consistent with the build flags.

if test x"${OVERRIDE_CPPFLAGS}" != x; then
  CPPFLAGS="${OVERRIDE_CPPFLAGS}"
else
  CPPFLAGS="$C_SWITCH_SYSTEM $C_SWITCH_MACHINE $CPPFLAGS"
fi

1223 1224
# Suppress obsolescent Autoconf test for size_t; Emacs assumes C89 or better.
AC_DEFUN([AC_TYPE_SIZE_T])
1225 1226
# Likewise for obsolescent test for uid_t, gid_t; Emacs assumes them.
AC_DEFUN([AC_TYPE_UID_T])
1227

1228 1229

LIB_MATH=-lm
1230 1231 1232 1233
dnl Current possibilities handled by sed (aix4-2 -> aix,
dnl gnu-linux -> gnu/linux, etc.):
dnl gnu, gnu/linux, gnu/kfreebsd, aix, cygwin, darwin, hpux, irix.
dnl And special cases: berkeley-unix, usg-unix-v, ms-dos, windows-nt.
1234
SYSTEM_TYPE=`echo $opsys | sed -e 's/[[0-9]].*//' -e 's|-|/|'`
1235 1236 1237 1238 1239 1240 1241 1242 1243

case $opsys in
  cygwin )
    LIB_MATH=
    ;;
  darwin )
    ## Adding -lm confuses the dynamic linker, so omit it.
    LIB_MATH=
    ;;
1244
  freebsd | dragonfly )
1245
    SYSTEM_TYPE=berkeley-unix
1246 1247 1248 1249 1250
    ;;
  gnu-linux | gnu-kfreebsd )
    ;;
  hpux10-20 | hpux11 )
    ;;
1251 1252
  mingw32 )
    LIB_MATH=
1253
    SYSTEM_TYPE=windows-nt
1254
    ;;
1255
  dnl NB this may be adjusted below.
1256
  netbsd | openbsd )
1257
    SYSTEM_TYPE=berkeley-unix
1258
    ;;
1259 1260 1261 1262 1263

  sol2* | unixware )
    SYSTEM_TYPE=usg-unix-v
    ;;

1264 1265 1266
esac

AC_SUBST(LIB_MATH)
1267 1268
AC_DEFINE_UNQUOTED(SYSTEM_TYPE, "$SYSTEM_TYPE",
  [The type of system you are compiling for; sets `system-type'.])
1269

1270

1271 1272
pre_PKG_CONFIG_CFLAGS=$CFLAGS
pre_PKG_CONFIG_LIBS=$LIBS
1273

1274 1275
AC_PATH_PROG(PKG_CONFIG, pkg-config, no)

1276 1277 1278 1279 1280 1281 1282 1283 1284
dnl This function definition taken from Gnome 2.0
dnl PKG_CHECK_MODULES(GSTUFF, gtk+-2.0 >= 1.3 glib = 1.3.4, action-if, action-not)
dnl defines GSTUFF_LIBS, GSTUFF_CFLAGS, see pkg-config man page
dnl also defines GSTUFF_PKG_ERRORS on error
AC_DEFUN([PKG_CHECK_MODULES], [
  succeeded=no

  if test "$PKG_CONFIG" = "no" ; then
     ifelse([$4], , [AC_MSG_ERROR([
1285
      *** The pkg-config script could not be found. Make sure it is in your path, or give the full name of pkg-config with the PKG_CONFIG environment variable or --with-pkg-config-prog.  Or see http://www.freedesktop.org/software/pkgconfig to get pkg-config.])], [$4])
1286 1287
  else
     PKG_CONFIG_MIN_VERSION=0.9.0
1288
     if "$PKG_CONFIG" --atleast-pkgconfig-version $PKG_CONFIG_MIN_VERSION; then
1289 1290
        AC_MSG_CHECKING(for $2)

1291 1292 1293
        if "$PKG_CONFIG" --exists "$2" 2>&AS_MESSAGE_LOG_FD &&
	   $1_CFLAGS=`"$PKG_CONFIG" --cflags "$2" 2>&AS_MESSAGE_LOG_FD` &&
	   $1_LIBS=`"$PKG_CONFIG" --libs "$2" 2>&AS_MESSAGE_LOG_FD`; then
1294 1295 1296 1297 1298 1299