acinclude.m4

   1 dnl ---------------------------------------------------------------------------
   2 dnl
   3 dnl Macros for configure.in for wxWindows by Robert Roebling, Phil Blecker,
   4 dnl Vadim Zeitlin and Ron Lee
   5 dnl
   6 dnl This script is under the wxWindows licence.
   7 dnl
   8 dnl Version: $Id$
   9 dnl ---------------------------------------------------------------------------
  10
  11
  12 dnl ===========================================================================
  13 dnl Objective-C(++) related macros
  14 dnl ===========================================================================
  15 m4_define([AC_WX_LANG_OBJECTIVEC],
  16 [AC_LANG(C)
  17 ac_ext=m
  18 ])
  19
  20 m4_define([AC_WX_LANG_OBJECTIVECPLUSPLUS],
  21 [AC_LANG(C++)
  22 ac_ext=mm
  23 ])
  24
  25 dnl ===========================================================================
  26 dnl macros to find the a file in the list of include/lib paths
  27 dnl ===========================================================================
  28
  29 dnl ---------------------------------------------------------------------------
  30 dnl call WX_PATH_FIND_INCLUDES(search path, header name), sets ac_find_includes
  31 dnl to the full name of the file that was found or leaves it empty if not found
  32 dnl ---------------------------------------------------------------------------
  33 AC_DEFUN([WX_PATH_FIND_INCLUDES],
  34 [
  35 ac_find_includes=
  36 for ac_dir in $1 /usr/include;
  37   do
  38     if test -f "$ac_dir/$2"; then
  39       ac_find_includes=$ac_dir
  40       break
  41     fi
  42   done
  43 ])
  44
  45 dnl ---------------------------------------------------------------------------
  46 dnl call WX_PATH_FIND_LIBRARIES(search path, lib name), sets ac_find_libraries
  47 dnl to the full name of the file that was found or leaves it empty if not found
  48 dnl ---------------------------------------------------------------------------
  49 AC_DEFUN([WX_PATH_FIND_LIBRARIES],
  50 [
  51   ac_find_libraries=
  52   for ac_dir in $1;
  53   do
  54     for ac_extension in a so sl dylib dll.a; do
  55       if test -f "$ac_dir/lib$2.$ac_extension"; then
  56         ac_find_libraries=$ac_dir
  57         break 2
  58       fi
  59     done
  60   done
  61 ])
  62
  63 dnl ---------------------------------------------------------------------------
  64 dnl return list of standard library paths
  65 dnl ---------------------------------------------------------------------------
  66 dnl return all default locations:
  67 dnl   - /usr/lib: standard
  68 dnl   - /usr/lib32: n32 ABI on IRIX
  69 dnl   - /usr/lib64: n64 ABI on IRIX
  70 dnl   - /usr/lib/64: 64 bit ABI on Solaris and Linux x86-64
  71 dnl
  72 dnl NB: if any of directories in the list is not a subdir of /usr, code setting
  73 dnl     wx_cv_std_libpath needs to be updated
  74 AC_DEFUN([WX_STD_LIBPATH], [/usr/lib /usr/lib32 /usr/lib/64 /usr/lib64])
  75
  76 dnl ---------------------------------------------------------------------------
  77 dnl Path to include, already defined
  78 dnl ---------------------------------------------------------------------------
  79 AC_DEFUN([WX_INCLUDE_PATH_EXIST],
  80 [
  81   dnl never add -I/usr/include to the CPPFLAGS
  82   if test "x$1" = "x/usr/include"; then
  83     ac_path_to_include=""
  84   else
  85     echo "$2" | grep "\-I$1" > /dev/null
  86     result=$?
  87     if test $result = 0; then
  88       ac_path_to_include=""
  89     else
  90       ac_path_to_include=" -I$1"
  91     fi
  92   fi
  93 ])
  94
  95 dnl ---------------------------------------------------------------------------
  96 dnl Usage: WX_LINK_PATH_EXIST(path, libpath)
  97 dnl
  98 dnl Set ac_path_to_link to nothing if path is already in libpath of to -Lpath
  99 dnl if it is not, so that libpath can be set to "$libpath$ac_path_to_link"
 100 dnl after calling this function
 101 dnl ---------------------------------------------------------------------------
 102 AC_DEFUN([WX_LINK_PATH_EXIST],
 103 [
 104   dnl never add -L/usr/libXXX explicitely to libpath
 105   if test "$1" = "default location"; then
 106     ac_path_to_link=""
 107   else
 108     echo "$2" | grep "\-L$1" > /dev/null
 109     result=$?
 110     if test $result = 0; then
 111       ac_path_to_link=""
 112     else
 113       ac_path_to_link=" -L$1"
 114     fi
 115   fi
 116 ])
 117
 118 dnl ===========================================================================
 119 dnl C++ features test
 120 dnl ===========================================================================
 121
 122 dnl ---------------------------------------------------------------------------
 123 dnl WX_CPP_NEW_HEADERS checks whether the compiler has "new" <iostream> header
 124 dnl or only the old <iostream.h> one - it may be generally assumed that if
 125 dnl <iostream> exists, the other "new" headers (without .h) exist too.
 126 dnl
 127 dnl call WX_CPP_NEW_HEADERS(actiof-if-true, action-if-false)
 128 dnl ---------------------------------------------------------------------------
 129
 130 AC_DEFUN([WX_CPP_NEW_HEADERS],
 131 [
 132     AC_LANG_SAVE
 133     AC_LANG_CPLUSPLUS
 134
 135     AC_CHECK_HEADERS([iostream],,, [ ])
 136
 137     if test "$ac_cv_header_iostream" = "yes" ; then
 138       ifelse([$1], , :, [$1])
 139     else
 140       ifelse([$2], , :, [$2])
 141     fi
 142
 143     AC_LANG_RESTORE
 144 ])
 145
 146 dnl ---------------------------------------------------------------------------
 147 dnl WX_CPP_BOOL checks whether the C++ compiler has a built in bool type
 148 dnl
 149 dnl call WX_CPP_BOOL - will define HAVE_BOOL if the compiler supports bool
 150 dnl ---------------------------------------------------------------------------
 151
 152 AC_DEFUN([WX_CPP_BOOL],
 153 [
 154   AC_CACHE_CHECK([if C++ compiler supports bool], wx_cv_cpp_bool,
 155   [
 156     AC_LANG_SAVE
 157     AC_LANG_CPLUSPLUS
 158
 159     AC_TRY_COMPILE(
 160       [
 161       ],
 162       [
 163         bool b = true;
 164
 165         return 0;
 166       ],
 167       [
 168         wx_cv_cpp_bool=yes
 169       ],
 170       [
 171         wx_cv_cpp_bool=no
 172       ]
 173     )
 174
 175     AC_LANG_RESTORE
 176   ])
 177
 178   if test "$wx_cv_cpp_bool" = "yes"; then
 179     AC_DEFINE(HAVE_BOOL)
 180   fi
 181 ])
 182
 183 dnl ---------------------------------------------------------------------------
 184 dnl WX_CPP_EXPLICIT checks whether the C++ compiler support the explicit
 185 dnl keyword and defines HAVE_EXPLICIT if this is the case
 186 dnl ---------------------------------------------------------------------------
 187
 188 AC_DEFUN([WX_CPP_EXPLICIT],
 189 [
 190   AC_CACHE_CHECK([if C++ compiler supports the explicit keyword],
 191                  wx_cv_explicit,
 192   [
 193     AC_LANG_SAVE
 194     AC_LANG_CPLUSPLUS
 195
 196     dnl do the test in 2 steps: first check that the compiler knows about the
 197     dnl explicit keyword at all and then verify that it really honours it
 198     AC_TRY_COMPILE(
 199       [
 200         class Foo { public: explicit Foo(int) {} };
 201       ],
 202       [
 203         return 0;
 204       ],
 205       [
 206         AC_TRY_COMPILE(
 207             [
 208                 class Foo { public: explicit Foo(int) {} };
 209                 static void TakeFoo(const Foo& foo) { }
 210             ],
 211             [
 212                 TakeFoo(17);
 213                 return 0;
 214             ],
 215             wx_cv_explicit=no,
 216             wx_cv_explicit=yes
 217         )
 218       ],
 219       wx_cv_explicit=no
 220     )
 221
 222     AC_LANG_RESTORE
 223   ])
 224
 225   if test "$wx_cv_explicit" = "yes"; then
 226     AC_DEFINE(HAVE_EXPLICIT)
 227   fi
 228 ])
 229
 230 dnl ---------------------------------------------------------------------------
 231 dnl WX_CHECK_FUNCS(FUNCTIONS...,
 232 dnl                [ACTION-IF-FOUND],
 233 dnl                [ACTION-IF-NOT-FOUND],
 234 dnl                [EXTRA-DEFINES-AND-INCLUDES],
 235 dnl                [EXTRA-TEST-CODE])
 236 dnl
 237 dnl Checks that the functions listed in FUNCTIONS exist in the headers and the
 238 dnl libs. For each function, if it is found then defines 'HAVE_FUNCTION' and
 239 dnl executes ACTION-IF-FOUND, otherwise executes ACTION-IF-NOT-FOUND.
 240 dnl
 241 dnl The code from EXTRA-DEFINES-AND-INCLUDES is inserted into the test before
 242 dnl the default headers are included, and EXTRA-TEST-CODE is inserted into
 243 dnl the main() function after the default test for existence.
 244 dnl
 245 dnl Examples:
 246 dnl   # the simple case
 247 dnl   WX_CHECK_FUNCS(stat)
 248 dnl   # use break to finish the loop early
 249 dnl   WX_CHECK_FUNCS(mkstemp mktemp, break)
 250 dnl   # extra defines
 251 dnl   WX_CHECK_FUNCS(strtok_r, [], [], [#define _RREENTRANT])
 252 dnl   # extra includes
 253 dnl   WX_CHECK_FUNCS(swprintf, [], [], [#include <wchar.h>])
 254 dnl   # checking the signature with extra test code
 255 dnl   WX_CHECK_FUNCS(gettimeofday, [], [], [#include <sys/time.h>]
 256 dnl     [struct timeval tv; struct timezone tz; gettimeofday(&tv, &tz)])
 257 dnl ---------------------------------------------------------------------------
 258
 259 AC_DEFUN([WX_CHECK_FUNCS],
 260 [
 261   for wx_func in $1
 262   do
 263     AC_CACHE_CHECK(
 264       [for $wx_func],
 265       [wx_cv_func_$wx_func],
 266       [
 267         AC_LINK_IFELSE(
 268           [
 269             AC_LANG_PROGRAM(
 270               [
 271                 $4
 272                 AC_INCLUDES_DEFAULT
 273               ],
 274               [
 275                 #ifndef $wx_func
 276                   &$wx_func;
 277                 #endif
 278                 $5
 279               ])
 280           ],
 281           [eval wx_cv_func_$wx_func=yes],
 282           [eval wx_cv_func_$wx_func=no])
 283       ])
 284
 285     if eval test \$wx_cv_func_$wx_func = yes
 286     then
 287       AC_DEFINE_UNQUOTED([AS_TR_CPP([HAVE_$wx_func])])
 288       $2
 289     else
 290       :
 291       $3
 292     fi
 293   done
 294 ])
 295
 296 dnl ---------------------------------------------------------------------------
 297 dnl a slightly better AC_C_BIGENDIAN macro which allows cross-compiling
 298 dnl ---------------------------------------------------------------------------
 299
 300 AC_DEFUN([WX_C_BIGENDIAN],
 301 [AC_CACHE_CHECK([whether byte ordering is bigendian], ac_cv_c_bigendian,
 302 [ac_cv_c_bigendian=unknown
 303 # See if sys/param.h defines the BYTE_ORDER macro.
 304 AC_TRY_COMPILE([#include <sys/types.h>
 305 #include <sys/param.h>], [
 306 #if !BYTE_ORDER || !BIG_ENDIAN || !LITTLE_ENDIAN
 307  bogus endian macros
 308 #endif], [# It does; now see whether it defined to BIG_ENDIAN or not.
 309 AC_TRY_COMPILE([#include <sys/types.h>
 310 #include <sys/param.h>], [
 311 #if BYTE_ORDER != BIG_ENDIAN
 312  not big endian
 313 #endif], ac_cv_c_bigendian=yes, ac_cv_c_bigendian=no)])
 314 if test $ac_cv_c_bigendian = unknown; then
 315 AC_TRY_RUN([main () {
 316   /* Are we little or big endian?  From Harbison&Steele.  */
 317   union
 318   {
 319     long l;
 320     char c[sizeof (long)];
 321   } u;
 322   u.l = 1;
 323   exit (u.c[sizeof (long) - 1] == 1);
 324 }], [ac_cv_c_bigendian=no], [ac_cv_c_bigendian=yes], [ac_cv_c_bigendian=unknown])
 325 fi])
 326 if test $ac_cv_c_bigendian = unknown; then
 327   AC_MSG_WARN([Assuming little-endian target machine - this may be overriden by adding the line "ac_cv_c_bigendian=${ac_cv_c_bigendian='yes'}" to config.cache file])
 328 fi
 329 if test $ac_cv_c_bigendian = yes; then
 330   AC_DEFINE(WORDS_BIGENDIAN)
 331 fi
 332 ])
 333
 334 dnl ---------------------------------------------------------------------------
 335 dnl override AC_ARG_ENABLE/WITH to cache the results in .cache file
 336 dnl ---------------------------------------------------------------------------
 337
 338 AC_DEFUN([WX_ARG_CACHE_INIT],
 339         [
 340           wx_arg_cache_file="configarg.cache"
 341           echo "loading argument cache $wx_arg_cache_file"
 342           rm -f ${wx_arg_cache_file}.tmp
 343           touch ${wx_arg_cache_file}.tmp
 344           touch ${wx_arg_cache_file}
 345         ])
 346
 347 AC_DEFUN([WX_ARG_CACHE_FLUSH],
 348         [
 349           echo "saving argument cache $wx_arg_cache_file"
 350           mv ${wx_arg_cache_file}.tmp ${wx_arg_cache_file}
 351         ])
 352
 353 dnl return the name of the variable to store the value of the given
 354 dnl WX_ARG_WITH/ENABLE option
 355 AC_DEFUN([WX_ARG_CACHE_NAME],)
 356
 357 dnl this macro checks for a three-valued command line --with argument:
 358 dnl   possible arguments are 'yes', 'no', 'sys', or 'builtin'
 359 dnl usage: WX_ARG_SYS_WITH(option, helpmessage, variable-name)
 360 dnl
 361 dnl the default value (used if the option is not specified at all) is the value
 362 dnl of wxUSE_ALL_FEATURES (which is "yes" by default but can be changed by
 363 dnl giving configure --disable-all-features option)
 364 AC_DEFUN([WX_ARG_SYS_WITH],
 365         [
 366           AC_MSG_CHECKING([for --with-$1])
 367           AC_ARG_WITH($1, [$2],
 368                       [
 369                         if test "$withval" = yes; then
 370                           AS_TR_SH(wx_cv_use_$1)='$3=yes'
 371                         elif test "$withval" = no; then
 372                           AS_TR_SH(wx_cv_use_$1)='$3=no'
 373                         elif test "$withval" = sys; then
 374                           AS_TR_SH(wx_cv_use_$1)='$3=sys'
 375                         elif test "$withval" = builtin; then
 376                           AS_TR_SH(wx_cv_use_$1)='$3=builtin'
 377                         else
 378                           AC_MSG_ERROR([Invalid value for --with-$1: should be yes, no, sys, or builtin])
 379                         fi
 380                         cache=yes
 381                       ],
 382                       [
 383                         LINE=`grep "^$3=" ${wx_arg_cache_file}`
 384                         if test "x$LINE" != x ; then
 385                             eval "DEFAULT_$LINE"
 386                             cache=yes
 387                         else
 388                             cache=no
 389                         fi
 390
 391                         AS_TR_SH(wx_cv_use_$1)='$3=${'DEFAULT_$3":-$wxUSE_ALL_FEATURES}"
 392                       ])
 393
 394           eval "$AS_TR_SH(wx_cv_use_$1)"
 395           if test "x$cache" = xyes; then
 396             echo "$3=$$3" >> ${wx_arg_cache_file}.tmp
 397           fi
 398
 399           if test "$$3" = yes; then
 400             AC_MSG_RESULT(yes)
 401           elif test "$$3" = no; then
 402             AC_MSG_RESULT(no)
 403           elif test "$$3" = sys; then
 404             AC_MSG_RESULT([system version])
 405           elif test "$$3" = builtin; then
 406             AC_MSG_RESULT([builtin version])
 407           else
 408             AC_MSG_ERROR([Invalid value for --with-$1: should be yes, no, sys, or builtin])
 409           fi
 410         ])
 411
 412 dnl this macro checks for a command line argument and caches the result
 413 dnl usage: WX_ARG_WITH(option, helpmessage, variable-name, [withstring])
 414 AC_DEFUN([WX_ARG_WITH],
 415         [
 416           withstring=$4
 417           defaultval=$wxUSE_ALL_FEATURES
 418           if test -z "$defaultval"; then
 419               if test x"$withstring" = xwithout; then
 420                   defaultval=yes
 421               else
 422                   defaultval=no
 423               fi
 424           fi
 425           AC_MSG_CHECKING([for --${withstring:-with}-$1])
 426           AC_ARG_WITH($1, [$2],
 427                       [
 428                         if test "$withval" = yes; then
 429                           AS_TR_SH(wx_cv_use_$1)='$3=yes'
 430                         else
 431                           AS_TR_SH(wx_cv_use_$1)='$3=no'
 432                         fi
 433                         cache=yes
 434                       ],
 435                       [
 436                         LINE=`grep "^$3=" ${wx_arg_cache_file}`
 437                         if test "x$LINE" != x ; then
 438                             eval "DEFAULT_$LINE"
 439                             cache=yes
 440                         else
 441                             cache=no
 442                         fi
 443
 444                         AS_TR_SH(wx_cv_use_$1)='$3=${'DEFAULT_$3":-$defaultval}"
 445                       ])
 446
 447           eval "$AS_TR_SH(wx_cv_use_$1)"
 448           if test "x$cache" = xyes; then
 449             echo "$3=$$3" >> ${wx_arg_cache_file}.tmp
 450           fi
 451
 452           if test x"$withstring" = xwithout; then
 453             if test $$3 = yes; then
 454               result=no
 455             else
 456               result=yes
 457             fi
 458           else
 459             result=$$3
 460           fi
 461
 462           AC_MSG_RESULT($result)
 463         ])
 464
 465 dnl same as WX_ARG_WITH but makes it clear that the option is enabled by default
 466 AC_DEFUN([WX_ARG_WITHOUT], [WX_ARG_WITH($1, [$2], $3, without)])
 467
 468 dnl like WX_ARG_WITH but uses AC_ARG_ENABLE instead of AC_ARG_WITH
 469 dnl usage: WX_ARG_ENABLE(option, helpmessage, var, [enablestring], [default])
 470 dnl
 471 dnl enablestring can be omitted or a literal string "disable" and allows to
 472 dnl show "checking for --disable-foo" message when running configure instead of
 473 dnl the default "checking for --enable-foo" one whih is useful for the options
 474 dnl enabled by default
 475 dnl
 476 dnl the "default" argument can be omitted or contain the default value to use
 477 dnl for the option if it's unspecified
 478 AC_DEFUN([WX_ARG_ENABLE],
 479         [
 480           enablestring=$4
 481           defaultval=$5
 482           if test -z "$defaultval"; then
 483               if test x"$enablestring" = xdisable; then
 484                   defaultval=yes
 485               else
 486                   defaultval=no
 487               fi
 488           fi
 489
 490           AC_MSG_CHECKING([for --${enablestring:-enable}-$1])
 491           AC_ARG_ENABLE($1, [$2],
 492                         [
 493                           if test "$enableval" = yes; then
 494                             AS_TR_SH(wx_cv_use_$1)='$3=yes'
 495                           else
 496                             AS_TR_SH(wx_cv_use_$1)='$3=no'
 497                           fi
 498                           cache=yes
 499                         ],
 500                         [
 501                           LINE=`grep "^$3=" ${wx_arg_cache_file}`
 502                           if test "x$LINE" != x ; then
 503                               eval "DEFAULT_$LINE"
 504                               cache=yes
 505                           else
 506                               cache=no
 507                           fi
 508
 509                           AS_TR_SH(wx_cv_use_$1)='$3=${'DEFAULT_$3":-$defaultval}"
 510                         ])
 511
 512           eval "$AS_TR_SH(wx_cv_use_$1)"
 513           if test "x$cache" = xyes; then
 514             echo "$3=$$3" >> ${wx_arg_cache_file}.tmp
 515           fi
 516
 517           if test x"$enablestring" = xdisable; then
 518             if test $$3 = yes; then
 519               result=no
 520             else
 521               result=yes
 522             fi
 523           else
 524             result=$$3
 525           fi
 526
 527           AC_MSG_RESULT($result)
 528         ])
 529
 530 dnl the same as WX_ARG_ENABLE but makes it more clear that the option is
 531 dnl enabled by default
 532 AC_DEFUN([WX_ARG_DISABLE], [WX_ARG_ENABLE($1, [$2], $3, disable)])
 533
 534 dnl same as WX_ARG_ENABLE but defaults to wxUSE_ALL_FEATURES instead of "yes"
 535 AC_DEFUN([WX_ARG_FEATURE], [WX_ARG_ENABLE($1, [$2], $3,, $wxUSE_ALL_FEATURES)])
 536
 537 dnl Like WX_ARG_ENABLE but accepts a parameter.
 538 dnl
 539 dnl Usage:
 540 dnl   WX_ARG_ENABLE_PARAM(option, helpmessage, variable-name, enablestring)
 541 dnl
 542 dnl Example:
 543 dnl   WX_ARG_ENABLE_PARAM(foo, [[  --enable-foo[=bar] use foo]], wxUSE_FOO)
 544 dnl
 545 dnl  --enable-foo       wxUSE_FOO=yes
 546 dnl  --disable-foo      wxUSE_FOO=no
 547 dnl  --enable-foo=bar   wxUSE_FOO=bar
 548 dnl  <not given>        value from configarg.cache or
 549 dnl                     wxUSE_FOO=$DEFAULT_wxUSE_FOO
 550 dnl
 551 AC_DEFUN([WX_ARG_ENABLE_PARAM],
 552         [
 553           enablestring=$4
 554           AC_MSG_CHECKING([for --${enablestring:-enable}-$1])
 555           AC_ARG_ENABLE($1, [$2],
 556                         [
 557                           wx_cv_use_$1="$3='$enableval'"
 558                           cache=yes
 559                         ],
 560                         [
 561                           LINE=`grep "^$3=" ${wx_arg_cache_file}`
 562                           if test "x$LINE" != x ; then
 563                             eval "DEFAULT_$LINE"
 564                             cache=yes
 565                           else
 566                             cache=no
 567                           fi
 568
 569                           wx_cv_use_$1='$3='$DEFAULT_$3
 570                         ])
 571
 572           eval "$wx_cv_use_$1"
 573           if test "x$cache" = xyes; then
 574             echo "$3=$$3" >> ${wx_arg_cache_file}.tmp
 575           fi
 576
 577           AC_MSG_RESULT([$$3])
 578         ])
 579
 580 dnl ===========================================================================
 581 dnl Linker features test
 582 dnl ===========================================================================
 583
 584 dnl ---------------------------------------------------------------------------
 585 dnl WX_VERSIONED_SYMBOLS checks whether the linker can create versioned
 586 dnl symbols. If it can, sets LDFLAGS_VERSIONING to $CXX flags needed to use
 587 dnl version script file named versionfile
 588 dnl
 589 dnl call WX_VERSIONED_SYMBOLS(versionfile)
 590 dnl ---------------------------------------------------------------------------
 591 AC_DEFUN([WX_VERSIONED_SYMBOLS],
 592 [
 593     case "${host}" in
 594         *-*-cygwin* | *-*-mingw* )
 595             dnl although ld does support version script option on these
 596             dnl platforms, it doesn't make much sense to use it under Win32
 597             dnl and, moreover, this breaks linking because of a bug in handling
 598             dnl paths in -Wl,--version-script,path option (if we ever do need
 599             dnl to use it for cygwin/mingw32, keep in mind that replacing last
 600             dnl comma with the equal sign works) so
 601             dnl simply disable it
 602             wx_cv_version_script=no
 603             ;;
 604
 605         *)
 606             AC_CACHE_CHECK([if the linker accepts --version-script], wx_cv_version_script,
 607             [
 608                 echo "VER_1 { *; };" >conftest.sym
 609                 echo "int main() { return 0; }" >conftest.cpp
 610
 611                 if AC_TRY_COMMAND([
 612                         $CXX -o conftest.output $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.cpp
 613                         -Wl,--version-script,conftest.sym >/dev/null 2>conftest.stderr]) ; then
 614                   if test -s conftest.stderr ; then
 615                       wx_cv_version_script=no
 616                   else
 617                       wx_cv_version_script=yes
 618                   fi
 619                 else
 620                   wx_cv_version_script=no
 621                 fi
 622
 623                 dnl There's a problem in some old linkers with --version-script that
 624                 dnl can cause linking to fail when you have objects with vtables in
 625                 dnl libs 3 deep.  This is known to happen in netbsd and openbsd with
 626                 dnl ld 2.11.2.
 627                 dnl
 628                 dnl To test for this we need to make some shared libs and
 629                 dnl unfortunately we can't be sure of the right way to do that. If the
 630                 dnl first two compiles don't succeed then it looks like the test isn't
 631                 dnl working and the result is ignored, but if OTOH the first two
 632                 dnl succeed but the third does not then the bug has been detected and
 633                 dnl the --version-script flag is dropped.
 634                 if test $wx_cv_version_script = yes
 635                 then
 636                   echo "struct B { virtual ~B() { } }; \
 637                         struct D : public B { }; \
 638                         void F() { D d; }" > conftest.cpp
 639
 640                   if AC_TRY_COMMAND([
 641                         $CXX -shared -fPIC -o conftest1.output $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.cpp
 642                         -Wl,--version-script,conftest.sym >/dev/null 2>/dev/null]) &&
 643                      AC_TRY_COMMAND([
 644                         $CXX -shared -fPIC -o conftest2.output $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.cpp
 645                         -Wl,--version-script,conftest.sym conftest1.output >/dev/null 2>/dev/null])
 646                   then
 647                     if AC_TRY_COMMAND([
 648                           $CXX -shared -fPIC -o conftest3.output $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.cpp
 649                           -Wl,--version-script,conftest.sym conftest2.output conftest1.output >/dev/null 2>/dev/null])
 650                     then
 651                       wx_cv_version_script=yes
 652                     else
 653                       wx_cv_version_script=no
 654                     fi
 655                   fi
 656                 fi
 657
 658                 rm -f conftest.output conftest.stderr conftest.sym conftest.cpp
 659                 rm -f conftest1.output conftest2.output conftest3.output
 660             ])
 661
 662             if test $wx_cv_version_script = yes ; then
 663                 LDFLAGS_VERSIONING="-Wl,--version-script,$1"
 664             fi
 665             ;;
 666     esac
 667 ])
 668
 669
 670 dnl ===========================================================================
 671 dnl "3rd party" macros included here because they are not widely available
 672 dnl ===========================================================================
 673
 674 dnl ---------------------------------------------------------------------------
 675 dnl test for availability of iconv()
 676 dnl ---------------------------------------------------------------------------
 677
 678 dnl From Bruno Haible.
 679
 680 AC_DEFUN([AM_ICONV],
 681 [
 682   dnl Some systems have iconv in libc, some have it in libiconv (OSF/1 and
 683   dnl those with the standalone portable GNU libiconv installed).
 684
 685   AC_ARG_WITH([libiconv-prefix],
 686 [  --with-libiconv-prefix=DIR  search for libiconv in DIR/include and DIR/lib], [
 687     for dir in `echo "$withval" | tr : ' '`; do
 688       if test -d $dir/include; then CPPFLAGS="$CPPFLAGS -I$dir/include"; fi
 689       if test -d $dir/lib; then LDFLAGS="$LDFLAGS -L$dir/lib"; fi
 690     done
 691    ])
 692
 693   AC_CACHE_CHECK(for iconv, am_cv_func_iconv, [
 694     am_cv_func_iconv="no, consider installing GNU libiconv"
 695     am_cv_lib_iconv=no
 696     AC_TRY_LINK([#include <stdlib.h>
 697 #include <iconv.h>],
 698       [iconv_t cd = iconv_open("","");
 699        iconv(cd,NULL,NULL,NULL,NULL);
 700        iconv_close(cd);],
 701       am_cv_func_iconv=yes)
 702     if test "$am_cv_func_iconv" != yes; then
 703       am_save_LIBS="$LIBS"
 704       LIBS="$LIBS -liconv"
 705       AC_TRY_LINK([#include <stdlib.h>
 706 #include <iconv.h>],
 707         [iconv_t cd = iconv_open("","");
 708          iconv(cd,NULL,NULL,NULL,NULL);
 709          iconv_close(cd);],
 710         am_cv_lib_iconv=yes
 711         am_cv_func_iconv=yes)
 712       LIBS="$am_save_LIBS"
 713     fi
 714   ])
 715   if test "$am_cv_func_iconv" = yes; then
 716     AC_DEFINE(HAVE_ICONV, 1, [Define if you have the iconv() function.])
 717     AC_CACHE_CHECK([if iconv needs const], wx_cv_func_iconv_const,
 718       AC_TRY_COMPILE([
 719 #include <stdlib.h>
 720 #include <iconv.h>
 721 extern
 722 #ifdef __cplusplus
 723 "C"
 724 #endif
 725 #if defined(__STDC__) || defined(__cplusplus)
 726 size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
 727 #else
 728 size_t iconv();
 729 #endif
 730         ],
 731         [],
 732         wx_cv_func_iconv_const="no",
 733         wx_cv_func_iconv_const="yes"
 734       )
 735     )
 736
 737     iconv_const=
 738     if test "x$wx_cv_func_iconv_const" = "xyes"; then
 739         iconv_const="const"
 740     fi
 741
 742     AC_DEFINE_UNQUOTED(ICONV_CONST, $iconv_const,
 743       [Define as const if the declaration of iconv() needs const.])
 744   fi
 745   LIBICONV=
 746   if test "$am_cv_lib_iconv" = yes; then
 747     LIBICONV="-liconv"
 748   fi
 749   AC_SUBST(LIBICONV)
 750 ])
 751
 752 dnl ---------------------------------------------------------------------------
 753 dnl AC_SYS_LARGEFILE (partly based on the code from autoconf 2.5x)
 754 dnl ---------------------------------------------------------------------------
 755
 756 dnl WX_SYS_LARGEFILE_TEST
 757 dnl
 758 dnl NB: original autoconf test was checking if compiler supported 6 bit off_t
 759 dnl     arithmetic properly but this failed miserably with gcc under Linux
 760 dnl     whereas the system still supports 64 bit files, so now simply check
 761 dnl     that off_t is big enough
 762 define(WX_SYS_LARGEFILE_TEST,
 763 [typedef struct {
 764     unsigned int field: sizeof(off_t) == 8;
 765 } wxlf;
 766 ])
 767
 768
 769 dnl WX_SYS_LARGEFILE_MACRO_VALUE(C-MACRO, VALUE, CACHE-VAR)
 770 define(WX_SYS_LARGEFILE_MACRO_VALUE,
 771 [
 772     AC_CACHE_CHECK([for $1 value needed for large files], [$3],
 773         [
 774           AC_TRY_COMPILE([#define $1 $2
 775                           #include <sys/types.h>],
 776                          WX_SYS_LARGEFILE_TEST,
 777                          [$3=$2],
 778                          [$3=no])
 779         ]
 780     )
 781
 782     if test "$$3" != no; then
 783         wx_largefile=yes
 784         AC_DEFINE_UNQUOTED([$1], [$$3])
 785     fi
 786 ])
 787
 788
 789 dnl AC_SYS_LARGEFILE
 790 dnl ----------------
 791 dnl By default, many hosts won't let programs access large files;
 792 dnl one must use special compiler options to get large-file access to work.
 793 dnl For more details about this brain damage please see:
 794 dnl http://www.sas.com/standards/large.file/x_open.20Mar96.html
 795 AC_DEFUN([AC_SYS_LARGEFILE],
 796 [AC_ARG_ENABLE(largefile,
 797                [  --disable-largefile     omit support for large files])
 798 if test "$enable_largefile" != no; then
 799     dnl _FILE_OFFSET_BITS==64 is needed for Linux, Solaris, ...
 800     dnl _LARGE_FILES -- for AIX
 801     wx_largefile=no
 802     WX_SYS_LARGEFILE_MACRO_VALUE(_FILE_OFFSET_BITS, 64, ac_cv_sys_file_offset_bits)
 803     if test "x$wx_largefile" != "xyes"; then
 804         WX_SYS_LARGEFILE_MACRO_VALUE(_LARGE_FILES, 1, ac_cv_sys_large_files)
 805     fi
 806
 807     AC_MSG_CHECKING(if large file support is available)
 808     if test "x$wx_largefile" = "xyes"; then
 809         AC_DEFINE(HAVE_LARGEFILE_SUPPORT)
 810     fi
 811     AC_MSG_RESULT($wx_largefile)
 812 fi
 813 ])
 814
 815
 816 dnl Available from the GNU Autoconf Macro Archive at:
 817 dnl http://www.gnu.org/software/ac-archive/htmldoc/ac_cxx_const_cast.html
 818 dnl
 819 AC_DEFUN([AC_CXX_CONST_CAST],
 820 [AC_CACHE_CHECK(whether the compiler supports const_cast<>,
 821 ac_cv_cxx_const_cast,
 822 [AC_LANG_SAVE
 823  AC_LANG_CPLUSPLUS
 824  AC_TRY_COMPILE(,[int x = 0;const int& y = x;int& z = const_cast<int&>(y);return z;],
 825  ac_cv_cxx_const_cast=yes, ac_cv_cxx_const_cast=no)
 826  AC_LANG_RESTORE
 827 ])
 828 if test "$ac_cv_cxx_const_cast" = yes; then
 829   AC_DEFINE(HAVE_CONST_CAST,,[define if the compiler supports const_cast<>])
 830 fi
 831 ])
 832
 833 dnl http://www.gnu.org/software/ac-archive/htmldoc/ac_cxx_reinterpret_cast.html
 834 AC_DEFUN([AC_CXX_REINTERPRET_CAST],
 835 [AC_CACHE_CHECK(whether the compiler supports reinterpret_cast<>,
 836 ac_cv_cxx_reinterpret_cast,
 837 [AC_LANG_SAVE
 838  AC_LANG_CPLUSPLUS
 839  AC_TRY_COMPILE([#include <typeinfo>
 840 class Base { public : Base () {} virtual void f () = 0;};
 841 class Derived : public Base { public : Derived () {} virtual void f () {} };
 842 class Unrelated { public : Unrelated () {} };
 843 int g (Unrelated&) { return 0; }],[
 844 Derived d;Base& b=d;Unrelated& e=reinterpret_cast<Unrelated&>(b);return g(e);],
 845  ac_cv_cxx_reinterpret_cast=yes, ac_cv_cxx_reinterpret_cast=no)
 846  AC_LANG_RESTORE
 847 ])
 848 if test "$ac_cv_cxx_reinterpret_cast" = yes; then
 849   AC_DEFINE(HAVE_REINTERPRET_CAST,,
 850             [define if the compiler supports reinterpret_cast<>])
 851 fi
 852 ])
 853
 854 dnl and http://www.gnu.org/software/ac-archive/htmldoc/ac_cxx_static_cast.html
 855 AC_DEFUN([AC_CXX_STATIC_CAST],
 856 [AC_CACHE_CHECK(whether the compiler supports static_cast<>,
 857 ac_cv_cxx_static_cast,
 858 [AC_LANG_SAVE
 859  AC_LANG_CPLUSPLUS
 860  AC_TRY_COMPILE([#include <typeinfo>
 861 class Base { public : Base () {} virtual void f () = 0; };
 862 class Derived : public Base { public : Derived () {} virtual void f () {} };
 863 int g (Derived&) { return 0; }],[
 864 Derived d; Base& b = d; Derived& s = static_cast<Derived&> (b); return g (s);],
 865  ac_cv_cxx_static_cast=yes, ac_cv_cxx_static_cast=no)
 866  AC_LANG_RESTORE
 867 ])
 868 if test "$ac_cv_cxx_static_cast" = yes; then
 869   AC_DEFINE(HAVE_STATIC_CAST,, [define if the compiler supports static_cast<>])
 870 fi
 871 ])
 872
 873 dnl http://autoconf-archive.cryp.to/ac_cxx_dynamic_cast.html
 874 AC_DEFUN([AC_CXX_DYNAMIC_CAST],
 875 [AC_CACHE_CHECK(whether the compiler supports dynamic_cast<>,
 876 ac_cv_cxx_dynamic_cast,
 877 [AC_LANG_SAVE
 878  AC_LANG_CPLUSPLUS
 879  AC_TRY_COMPILE([#include <typeinfo>
 880 class Base { public : Base () {} virtual void f () = 0;};
 881 class Derived : public Base { public : Derived () {} virtual void f () {} };],[
 882 Derived d; Base& b=d; return dynamic_cast<Derived*>(&b) ? 0 : 1;],
 883  ac_cv_cxx_dynamic_cast=yes, ac_cv_cxx_dynamic_cast=no)
 884  AC_LANG_RESTORE
 885 ])
 886 if test "$ac_cv_cxx_dynamic_cast" = yes; then
 887   AC_DEFINE(HAVE_DYNAMIC_CAST,,[define if the compiler supports dynamic_cast<>])
 888 fi
 889 ])
 890