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 a slightly better AC_C_BIGENDIAN macro which allows cross-compiling
 232 dnl ---------------------------------------------------------------------------
 233
 234 AC_DEFUN([WX_C_BIGENDIAN],
 235 [AC_CACHE_CHECK([whether byte ordering is bigendian], ac_cv_c_bigendian,
 236 [ac_cv_c_bigendian=unknown
 237 # See if sys/param.h defines the BYTE_ORDER macro.
 238 AC_TRY_COMPILE([#include <sys/types.h>
 239 #include <sys/param.h>], [
 240 #if !BYTE_ORDER || !BIG_ENDIAN || !LITTLE_ENDIAN
 241  bogus endian macros
 242 #endif], [# It does; now see whether it defined to BIG_ENDIAN or not.
 243 AC_TRY_COMPILE([#include <sys/types.h>
 244 #include <sys/param.h>], [
 245 #if BYTE_ORDER != BIG_ENDIAN
 246  not big endian
 247 #endif], ac_cv_c_bigendian=yes, ac_cv_c_bigendian=no)])
 248 if test $ac_cv_c_bigendian = unknown; then
 249 AC_TRY_RUN([main () {
 250   /* Are we little or big endian?  From Harbison&Steele.  */
 251   union
 252   {
 253     long l;
 254     char c[sizeof (long)];
 255   } u;
 256   u.l = 1;
 257   exit (u.c[sizeof (long) - 1] == 1);
 258 }], [ac_cv_c_bigendian=no], [ac_cv_c_bigendian=yes], [ac_cv_c_bigendian=unknown])
 259 fi])
 260 if test $ac_cv_c_bigendian = unknown; then
 261   AC_MSG_WARN([Assuming little-endian target machine - this may be overriden by adding the line "ac_cv_c_bigendian=${ac_cv_c_bigendian='yes'}" to config.cache file])
 262 fi
 263 if test $ac_cv_c_bigendian = yes; then
 264   AC_DEFINE(WORDS_BIGENDIAN)
 265 fi
 266 ])
 267
 268 dnl ---------------------------------------------------------------------------
 269 dnl override AC_ARG_ENABLE/WITH to cache the results in .cache file
 270 dnl ---------------------------------------------------------------------------
 271
 272 AC_DEFUN([WX_ARG_CACHE_INIT],
 273         [
 274           wx_arg_cache_file="configarg.cache"
 275           echo "loading argument cache $wx_arg_cache_file"
 276           rm -f ${wx_arg_cache_file}.tmp
 277           touch ${wx_arg_cache_file}.tmp
 278           touch ${wx_arg_cache_file}
 279         ])
 280
 281 AC_DEFUN([WX_ARG_CACHE_FLUSH],
 282         [
 283           echo "saving argument cache $wx_arg_cache_file"
 284           mv ${wx_arg_cache_file}.tmp ${wx_arg_cache_file}
 285         ])
 286
 287 dnl this macro checks for a three-valued command line --with argument:
 288 dnl   possible arguments are 'yes', 'no', 'sys', or 'builtin'
 289 dnl usage: WX_ARG_SYS_WITH(option, helpmessage, variable-name)
 290 AC_DEFUN([WX_ARG_SYS_WITH],
 291         [
 292           AC_MSG_CHECKING([for --with-$1])
 293           no_cache=0
 294           AC_ARG_WITH($1, [$2],
 295                       [
 296                         if test "$withval" = yes; then
 297                           ac_cv_use_$1='$3=yes'
 298                         elif test "$withval" = no; then
 299                           ac_cv_use_$1='$3=no'
 300                         elif test "$withval" = sys; then
 301                           ac_cv_use_$1='$3=sys'
 302                         elif test "$withval" = builtin; then
 303                           ac_cv_use_$1='$3=builtin'
 304                         else
 305                           AC_MSG_ERROR([Invalid value for --with-$1: should be yes, no, sys, or builtin])
 306                         fi
 307                       ],
 308                       [
 309                         LINE=`grep "$3" ${wx_arg_cache_file}`
 310                         if test "x$LINE" != x ; then
 311                           eval "DEFAULT_$LINE"
 312                         else
 313                           no_cache=1
 314                         fi
 315
 316                         ac_cv_use_$1='$3='$DEFAULT_$3
 317                       ])
 318
 319           eval "$ac_cv_use_$1"
 320           if test "$no_cache" != 1; then
 321             echo $ac_cv_use_$1 >> ${wx_arg_cache_file}.tmp
 322           fi
 323
 324           if test "$$3" = yes; then
 325             AC_MSG_RESULT(yes)
 326           elif test "$$3" = no; then
 327             AC_MSG_RESULT(no)
 328           elif test "$$3" = sys; then
 329             AC_MSG_RESULT([system version])
 330           elif test "$$3" = builtin; then
 331             AC_MSG_RESULT([builtin version])
 332           else
 333             AC_MSG_ERROR([Invalid value for --with-$1: should be yes, no, sys, or builtin])
 334           fi
 335         ])
 336
 337 dnl this macro checks for a command line argument and caches the result
 338 dnl usage: WX_ARG_WITH(option, helpmessage, variable-name, [withstring])
 339 AC_DEFUN([WX_ARG_WITH],
 340         [
 341           withstring=$4
 342           AC_MSG_CHECKING([for --${withstring:-with}-$1])
 343           no_cache=0
 344           AC_ARG_WITH($1, [$2],
 345                       [
 346                         if test "$withval" = yes; then
 347                           ac_cv_use_$1='$3=yes'
 348                         else
 349                           ac_cv_use_$1='$3=no'
 350                         fi
 351                       ],
 352                       [
 353                         LINE=`grep "$3" ${wx_arg_cache_file}`
 354                         if test "x$LINE" != x ; then
 355                           eval "DEFAULT_$LINE"
 356                         else
 357                           no_cache=1
 358                         fi
 359
 360                         ac_cv_use_$1='$3='$DEFAULT_$3
 361                       ])
 362
 363           eval "$ac_cv_use_$1"
 364           if test "$no_cache" != 1; then
 365             echo $ac_cv_use_$1 >> ${wx_arg_cache_file}.tmp
 366           fi
 367
 368           if test "$$3" = yes; then
 369             AC_MSG_RESULT(yes)
 370           else
 371             AC_MSG_RESULT(no)
 372           fi
 373         ])
 374
 375 dnl like WX_ARG_WITH but uses AC_ARG_ENABLE instead of AC_ARG_WITH
 376 dnl usage: WX_ARG_ENABLE(option, helpmessage, variable-name, enablestring)
 377 dnl
 378 dnl enablestring is a hack and allows to show "checking for --disable-foo"
 379 dnl message when running configure instead of the default "checking for
 380 dnl --enable-foo" one whih is useful for the options enabled by default
 381 AC_DEFUN([WX_ARG_ENABLE],
 382         [
 383           enablestring=$4
 384           AC_MSG_CHECKING([for --${enablestring:-enable}-$1])
 385           no_cache=0
 386           AC_ARG_ENABLE($1, [$2],
 387                         [
 388                           if test "$enableval" = yes; then
 389                             ac_cv_use_$1='$3=yes'
 390                           else
 391                             ac_cv_use_$1='$3=no'
 392                           fi
 393                         ],
 394                         [
 395                           LINE=`grep "$3" ${wx_arg_cache_file}`
 396                           if test "x$LINE" != x ; then
 397                             eval "DEFAULT_$LINE"
 398                           else
 399                             no_cache=1
 400                           fi
 401
 402                           ac_cv_use_$1='$3='$DEFAULT_$3
 403                         ])
 404
 405           eval "$ac_cv_use_$1"
 406           if test "$no_cache" != 1; then
 407             echo $ac_cv_use_$1 >> ${wx_arg_cache_file}.tmp
 408           fi
 409
 410           if test "$$3" = yes; then
 411             AC_MSG_RESULT(yes)
 412           else
 413             AC_MSG_RESULT(no)
 414           fi
 415         ])
 416
 417
 418 dnl ===========================================================================
 419 dnl Linker features test
 420 dnl ===========================================================================
 421
 422 dnl ---------------------------------------------------------------------------
 423 dnl WX_VERSIONED_SYMBOLS checks whether the linker can create versioned
 424 dnl symbols. If it can, sets LDFLAGS_VERSIONING to $CXX flags needed to use
 425 dnl version script file named versionfile
 426 dnl
 427 dnl call WX_VERSIONED_SYMBOLS(versionfile)
 428 dnl ---------------------------------------------------------------------------
 429 AC_DEFUN([WX_VERSIONED_SYMBOLS],
 430 [
 431   found_versioning=no
 432
 433   dnl FIXME - doesn't work, Solaris linker doesn't accept wildcards
 434   dnl         in the script.
 435   dnl dnl Check for known non-gcc cases:
 436   dnl case "${host}" in
 437   dnl   *-*-solaris2* )
 438   dnl     if test "x$GCC" != "xyes" ; then
 439   dnl         LDFLAGS_VERSIONING="-M $1"
 440   dnl         found_versioning=yes
 441   dnl     fi
 442   dnl   ;;
 443   dnl esac
 444
 445   dnl Generic check for GCC or GCC-like behaviour (Intel C++, GCC):
 446   if test $found_versioning = no ; then
 447       AC_CACHE_CHECK([if the linker accepts --version-script], wx_cv_version_script,
 448       [
 449         echo "VER_1 { *; };" >conftest.sym
 450         echo "int main() { return 0; }" >conftest.cpp
 451
 452         if AC_TRY_COMMAND([
 453                 $CXX -o conftest.output $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.cpp
 454                 -Wl,--version-script,conftest.sym >/dev/null 2>conftest.stderr]) ; then
 455           if test -s conftest.stderr ; then
 456               wx_cv_version_script=no
 457           else
 458               wx_cv_version_script=yes
 459           fi
 460         else
 461           wx_cv_version_script=no
 462         fi
 463
 464         dnl There's a problem in some old linkers with --version-script that
 465         dnl can cause linking to fail when you have objects with vtables in
 466         dnl libs 3 deep.  This is known to happen in netbsd and openbsd with
 467         dnl ld 2.11.2.
 468         dnl
 469         dnl To test for this we need to make some shared libs and
 470         dnl unfortunately we can't be sure of the right way to do that. If the
 471         dnl first two compiles don't succeed then it looks like the test isn't
 472         dnl working and the result is ignored, but if OTOH the first two
 473         dnl succeed but the third does not then the bug has been detected and
 474         dnl the --version-script flag is dropped.
 475         if test $wx_cv_version_script = yes
 476         then
 477           echo "struct B { virtual ~B() { } }; \
 478                 struct D : public B { }; \
 479                 void F() { D d; }" > conftest.cpp
 480
 481           if AC_TRY_COMMAND([
 482                 $CXX -shared -fPIC -o conftest1.output $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.cpp
 483                 -Wl,--version-script,conftest.sym >/dev/null 2>/dev/null]) &&
 484              AC_TRY_COMMAND([
 485                 $CXX -shared -fPIC -o conftest2.output $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.cpp
 486                 -Wl,--version-script,conftest.sym conftest1.output >/dev/null 2>/dev/null])
 487           then
 488             if AC_TRY_COMMAND([
 489                   $CXX -shared -fPIC -o conftest3.output $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.cpp
 490                   -Wl,--version-script,conftest.sym conftest2.output conftest1.output >/dev/null 2>/dev/null])
 491             then
 492               wx_cv_version_script=yes
 493             else
 494               wx_cv_version_script=no
 495             fi
 496           fi
 497         fi
 498
 499         rm -f conftest.output conftest.stderr conftest.sym conftest.cpp
 500         rm -f conftest1.output conftest2.output conftest3.output
 501       ])
 502       if test $wx_cv_version_script = yes ; then
 503         LDFLAGS_VERSIONING="-Wl,--version-script,$1"
 504       fi
 505   fi
 506 ])
 507
 508
 509 dnl ===========================================================================
 510 dnl "3rd party" macros included here because they are not widely available
 511 dnl ===========================================================================
 512
 513 dnl ---------------------------------------------------------------------------
 514 dnl test for availability of iconv()
 515 dnl ---------------------------------------------------------------------------
 516
 517 dnl From Bruno Haible.
 518
 519 AC_DEFUN([AM_ICONV],
 520 [
 521   dnl Some systems have iconv in libc, some have it in libiconv (OSF/1 and
 522   dnl those with the standalone portable GNU libiconv installed).
 523
 524   AC_ARG_WITH([libiconv-prefix],
 525 [  --with-libiconv-prefix=DIR  search for libiconv in DIR/include and DIR/lib], [
 526     for dir in `echo "$withval" | tr : ' '`; do
 527       if test -d $dir/include; then CPPFLAGS="$CPPFLAGS -I$dir/include"; fi
 528       if test -d $dir/lib; then LDFLAGS="$LDFLAGS -L$dir/lib"; fi
 529     done
 530    ])
 531
 532   AC_CACHE_CHECK(for iconv, am_cv_func_iconv, [
 533     am_cv_func_iconv="no, consider installing GNU libiconv"
 534     am_cv_lib_iconv=no
 535     AC_TRY_LINK([#include <stdlib.h>
 536 #include <iconv.h>],
 537       [iconv_t cd = iconv_open("","");
 538        iconv(cd,NULL,NULL,NULL,NULL);
 539        iconv_close(cd);],
 540       am_cv_func_iconv=yes)
 541     if test "$am_cv_func_iconv" != yes; then
 542       am_save_LIBS="$LIBS"
 543       LIBS="$LIBS -liconv"
 544       AC_TRY_LINK([#include <stdlib.h>
 545 #include <iconv.h>],
 546         [iconv_t cd = iconv_open("","");
 547          iconv(cd,NULL,NULL,NULL,NULL);
 548          iconv_close(cd);],
 549         am_cv_lib_iconv=yes
 550         am_cv_func_iconv=yes)
 551       LIBS="$am_save_LIBS"
 552     fi
 553   ])
 554   if test "$am_cv_func_iconv" = yes; then
 555     AC_DEFINE(HAVE_ICONV, 1, [Define if you have the iconv() function.])
 556     AC_CACHE_CHECK([if iconv needs const], wx_cv_func_iconv_const,
 557       AC_TRY_COMPILE([
 558 #include <stdlib.h>
 559 #include <iconv.h>
 560 extern
 561 #ifdef __cplusplus
 562 "C"
 563 #endif
 564 #if defined(__STDC__) || defined(__cplusplus)
 565 size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
 566 #else
 567 size_t iconv();
 568 #endif
 569         ],
 570         [],
 571         wx_cv_func_iconv_const="no",
 572         wx_cv_func_iconv_const="yes"
 573       )
 574     )
 575
 576     iconv_const=
 577     if test "x$wx_cv_func_iconv_const" = "xyes"; then
 578         iconv_const="const"
 579     fi
 580
 581     AC_DEFINE_UNQUOTED(ICONV_CONST, $iconv_const,
 582       [Define as const if the declaration of iconv() needs const.])
 583   fi
 584   LIBICONV=
 585   if test "$am_cv_lib_iconv" = yes; then
 586     LIBICONV="-liconv"
 587   fi
 588   AC_SUBST(LIBICONV)
 589 ])
 590
 591 dnl ---------------------------------------------------------------------------
 592 dnl AC_SYS_LARGEFILE (partly based on the code from autoconf 2.5x)
 593 dnl ---------------------------------------------------------------------------
 594
 595 dnl WX_SYS_LARGEFILE_TEST
 596 dnl
 597 dnl NB: original autoconf test was checking if compiler supported 6 bit off_t
 598 dnl     arithmetic properly but this failed miserably with gcc under Linux
 599 dnl     whereas the system still supports 64 bit files, so now simply check
 600 dnl     that off_t is big enough
 601 define(WX_SYS_LARGEFILE_TEST,
 602 [typedef struct {
 603     unsigned int field: sizeof(off_t) == 8;
 604 } wxlf;
 605 ])
 606
 607
 608 dnl WX_SYS_LARGEFILE_MACRO_VALUE(C-MACRO, VALUE, CACHE-VAR)
 609 define(WX_SYS_LARGEFILE_MACRO_VALUE,
 610 [
 611     AC_CACHE_CHECK([for $1 value needed for large files], [$3],
 612         [
 613           AC_TRY_COMPILE([#define $1 $2
 614                           #include <sys/types.h>],
 615                          WX_SYS_LARGEFILE_TEST,
 616                          [$3=$2],
 617                          [$3=no])
 618         ]
 619     )
 620
 621     if test "$$3" != no; then
 622         wx_largefile=yes
 623         AC_DEFINE_UNQUOTED([$1], [$$3])
 624     fi
 625 ])
 626
 627
 628 dnl AC_SYS_LARGEFILE
 629 dnl ----------------
 630 dnl By default, many hosts won't let programs access large files;
 631 dnl one must use special compiler options to get large-file access to work.
 632 dnl For more details about this brain damage please see:
 633 dnl http://www.sas.com/standards/large.file/x_open.20Mar96.html
 634 AC_DEFUN([AC_SYS_LARGEFILE],
 635 [AC_ARG_ENABLE(largefile,
 636                [  --disable-largefile     omit support for large files])
 637 if test "$enable_largefile" != no; then
 638     dnl _FILE_OFFSET_BITS==64 is needed for Linux, Solaris, ...
 639     dnl _LARGE_FILES -- for AIX
 640     wx_largefile=no
 641     WX_SYS_LARGEFILE_MACRO_VALUE(_FILE_OFFSET_BITS, 64, ac_cv_sys_file_offset_bits)
 642     if test "x$wx_largefile" != "xyes"; then
 643         WX_SYS_LARGEFILE_MACRO_VALUE(_LARGE_FILES, 1, ac_cv_sys_large_files)
 644     fi
 645
 646     AC_MSG_CHECKING(if large file support is available)
 647     if test "x$wx_largefile" = "xyes"; then
 648         AC_DEFINE(HAVE_LARGEFILE_SUPPORT)
 649     fi
 650     AC_MSG_RESULT($wx_largefile)
 651 fi
 652 ])
 653
 654
 655 dnl Available from the GNU Autoconf Macro Archive at:
 656 dnl http://www.gnu.org/software/ac-archive/htmldoc/ac_cxx_const_cast.html
 657 dnl
 658 AC_DEFUN([AC_CXX_CONST_CAST],
 659 [AC_CACHE_CHECK(whether the compiler supports const_cast<>,
 660 ac_cv_cxx_const_cast,
 661 [AC_LANG_SAVE
 662  AC_LANG_CPLUSPLUS
 663  AC_TRY_COMPILE(,[int x = 0;const int& y = x;int& z = const_cast<int&>(y);return z;],
 664  ac_cv_cxx_const_cast=yes, ac_cv_cxx_const_cast=no)
 665  AC_LANG_RESTORE
 666 ])
 667 if test "$ac_cv_cxx_const_cast" = yes; then
 668   AC_DEFINE(HAVE_CONST_CAST,,[define if the compiler supports const_cast<>])
 669 fi
 670 ])
 671
 672 dnl http://www.gnu.org/software/ac-archive/htmldoc/ac_cxx_reinterpret_cast.html
 673 AC_DEFUN([AC_CXX_REINTERPRET_CAST],
 674 [AC_CACHE_CHECK(whether the compiler supports reinterpret_cast<>,
 675 ac_cv_cxx_reinterpret_cast,
 676 [AC_LANG_SAVE
 677  AC_LANG_CPLUSPLUS
 678  AC_TRY_COMPILE([#include <typeinfo>
 679 class Base { public : Base () {} virtual void f () = 0;};
 680 class Derived : public Base { public : Derived () {} virtual void f () {} };
 681 class Unrelated { public : Unrelated () {} };
 682 int g (Unrelated&) { return 0; }],[
 683 Derived d;Base& b=d;Unrelated& e=reinterpret_cast<Unrelated&>(b);return g(e);],
 684  ac_cv_cxx_reinterpret_cast=yes, ac_cv_cxx_reinterpret_cast=no)
 685  AC_LANG_RESTORE
 686 ])
 687 if test "$ac_cv_cxx_reinterpret_cast" = yes; then
 688   AC_DEFINE(HAVE_REINTERPRET_CAST,,
 689             [define if the compiler supports reinterpret_cast<>])
 690 fi
 691 ])
 692
 693 dnl and http://www.gnu.org/software/ac-archive/htmldoc/ac_cxx_static_cast.html
 694 AC_DEFUN([AC_CXX_STATIC_CAST],
 695 [AC_CACHE_CHECK(whether the compiler supports static_cast<>,
 696 ac_cv_cxx_static_cast,
 697 [AC_LANG_SAVE
 698  AC_LANG_CPLUSPLUS
 699  AC_TRY_COMPILE([#include <typeinfo>
 700 class Base { public : Base () {} virtual void f () = 0; };
 701 class Derived : public Base { public : Derived () {} virtual void f () {} };
 702 int g (Derived&) { return 0; }],[
 703 Derived d; Base& b = d; Derived& s = static_cast<Derived&> (b); return g (s);],
 704  ac_cv_cxx_static_cast=yes, ac_cv_cxx_static_cast=no)
 705  AC_LANG_RESTORE
 706 ])
 707 if test "$ac_cv_cxx_static_cast" = yes; then
 708   AC_DEFINE(HAVE_STATIC_CAST,, [define if the compiler supports static_cast<>])
 709 fi
 710 ])
 711
 712 dnl http://autoconf-archive.cryp.to/ac_cxx_dynamic_cast.html
 713 AC_DEFUN([AC_CXX_DYNAMIC_CAST],
 714 [AC_CACHE_CHECK(whether the compiler supports dynamic_cast<>,
 715 ac_cv_cxx_dynamic_cast,
 716 [AC_LANG_SAVE
 717  AC_LANG_CPLUSPLUS
 718  AC_TRY_COMPILE([#include <typeinfo>
 719 class Base { public : Base () {} virtual void f () = 0;};
 720 class Derived : public Base { public : Derived () {} virtual void f () {} };],[
 721 Derived d; Base& b=d; return dynamic_cast<Derived*>(&b) ? 0 : 1;],
 722  ac_cv_cxx_dynamic_cast=yes, ac_cv_cxx_dynamic_cast=no)
 723  AC_LANG_RESTORE
 724 ])
 725 if test "$ac_cv_cxx_dynamic_cast" = yes; then
 726   AC_DEFINE(HAVE_DYNAMIC_CAST,,[define if the compiler supports dynamic_cast<>])
 727 fi
 728 ])
 729