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 dnl ===========================================================================
  12 dnl macros to find the a file in the list of include/lib paths
  13 dnl ===========================================================================
  14
  15 dnl ---------------------------------------------------------------------------
  16 dnl call WX_PATH_FIND_INCLUDES(search path, header name), sets ac_find_includes
  17 dnl to the full name of the file that was found or leaves it empty if not found
  18 dnl ---------------------------------------------------------------------------
  19 AC_DEFUN([WX_PATH_FIND_INCLUDES],
  20 [
  21 ac_find_includes=
  22 for ac_dir in $1;
  23   do
  24     if test -f "$ac_dir/$2"; then
  25       ac_find_includes=$ac_dir
  26       break
  27     fi
  28   done
  29 ])
  30
  31 dnl ---------------------------------------------------------------------------
  32 dnl call WX_PATH_FIND_LIBRARIES(search path, header name), sets ac_find_libraries
  33 dnl to the full name of the file that was found or leaves it empty if not found
  34 dnl ---------------------------------------------------------------------------
  35 AC_DEFUN([WX_PATH_FIND_LIBRARIES],
  36 [
  37 ac_find_libraries=
  38 for ac_dir in $1;
  39   do
  40     for ac_extension in a so sl dylib; do
  41       if test -f "$ac_dir/lib$2.$ac_extension"; then
  42         ac_find_libraries=$ac_dir
  43         break 2
  44       fi
  45     done
  46   done
  47 ])
  48
  49 dnl ---------------------------------------------------------------------------
  50 dnl Path to include, already defined
  51 dnl ---------------------------------------------------------------------------
  52 AC_DEFUN([WX_INCLUDE_PATH_EXIST],
  53 [
  54   ac_path_to_include=$1
  55   echo "$2" | grep "\-I$1" > /dev/null
  56   result=$?
  57   if test $result = 0; then
  58     ac_path_to_include=""
  59   else
  60     ac_path_to_include=" -I$1"
  61   fi
  62 ])
  63
  64 dnl ---------------------------------------------------------------------------
  65 dnl Path to link, already defined
  66 dnl ---------------------------------------------------------------------------
  67 AC_DEFUN([WX_LINK_PATH_EXIST],
  68 [
  69   echo "$2" | grep "\-L$1" > /dev/null
  70   result=$?
  71   if test $result = 0; then
  72     ac_path_to_link=""
  73   else
  74     ac_path_to_link=" -L$1"
  75   fi
  76 ])
  77
  78 dnl ===========================================================================
  79 dnl C++ features test
  80 dnl ===========================================================================
  81
  82 dnl ---------------------------------------------------------------------------
  83 dnl WX_CPP_NEW_HEADERS checks whether the compiler has "new" <iostream> header
  84 dnl or only the old <iostream.h> one - it may be generally assumed that if
  85 dnl <iostream> exists, the other "new" headers (without .h) exist too.
  86 dnl
  87 dnl call WX_CPP_NEW_HEADERS(actiof-if-true, action-if-false-or-cross-compiling)
  88 dnl ---------------------------------------------------------------------------
  89
  90 AC_DEFUN([WX_CPP_NEW_HEADERS],
  91 [
  92   if test "$cross_compiling" = "yes"; then
  93     ifelse([$2], , :, [$2])
  94   else
  95     AC_LANG_SAVE
  96     AC_LANG_CPLUSPLUS
  97
  98     AC_CHECK_HEADERS(iostream)
  99
 100     if test "$ac_cv_header_iostream" = "yes" ; then
 101       ifelse([$1], , :, [$1])
 102     else
 103       ifelse([$2], , :, [$2])
 104     fi
 105
 106     AC_LANG_RESTORE
 107   fi
 108 ])
 109
 110 dnl ---------------------------------------------------------------------------
 111 dnl WX_CPP_BOOL checks whether the C++ compiler has a built in bool type
 112 dnl
 113 dnl call WX_CPP_BOOL - will define HAVE_BOOL if the compiler supports bool
 114 dnl ---------------------------------------------------------------------------
 115
 116 AC_DEFUN([WX_CPP_BOOL],
 117 [
 118   AC_CACHE_CHECK([if C++ compiler supports bool], wx_cv_cpp_bool,
 119   [
 120     AC_LANG_SAVE
 121     AC_LANG_CPLUSPLUS
 122
 123     AC_TRY_COMPILE(
 124       [
 125       ],
 126       [
 127         bool b = true;
 128
 129         return 0;
 130       ],
 131       [
 132         wx_cv_cpp_bool=yes
 133       ],
 134       [
 135         wx_cv_cpp_bool=no
 136       ]
 137     )
 138
 139     AC_LANG_RESTORE
 140   ])
 141
 142   if test "$wx_cv_cpp_bool" = "yes"; then
 143     AC_DEFINE(HAVE_BOOL)
 144   fi
 145 ])
 146
 147 dnl ---------------------------------------------------------------------------
 148 dnl WX_CPP_EXPLICIT checks whether the C++ compiler support the explicit
 149 dnl keyword and defines HAVE_EXPLICIT if this is the case
 150 dnl ---------------------------------------------------------------------------
 151
 152 AC_DEFUN([WX_CPP_EXPLICIT],
 153 [
 154   AC_CACHE_CHECK([if C++ compiler supports the explicit keyword],
 155                  wx_cv_explicit,
 156   [
 157     AC_LANG_SAVE
 158     AC_LANG_CPLUSPLUS
 159
 160     dnl do the test in 2 steps: first check that the compiler knows about the
 161     dnl explicit keyword at all and then verify that it really honours it
 162     AC_TRY_COMPILE(
 163       [
 164         class Foo { public: explicit Foo(int) {} };
 165       ],
 166       [
 167         return 0;
 168       ],
 169       [
 170         AC_TRY_COMPILE(
 171             [
 172                 class Foo { public: explicit Foo(int) {} };
 173                 static void TakeFoo(const Foo& foo) { }
 174             ],
 175             [
 176                 TakeFoo(17);
 177                 return 0;
 178             ],
 179             wx_cv_explicit=no,
 180             wx_cv_explicit=yes
 181         )
 182       ],
 183       wx_cv_explicit=no
 184     )
 185
 186     AC_LANG_RESTORE
 187   ])
 188
 189   if test "$wx_cv_explicit" = "yes"; then
 190     AC_DEFINE(HAVE_EXPLICIT)
 191   fi
 192 ])
 193
 194 dnl ---------------------------------------------------------------------------
 195 dnl a slightly better AC_C_BIGENDIAN macro which allows cross-compiling
 196 dnl ---------------------------------------------------------------------------
 197
 198 AC_DEFUN([WX_C_BIGENDIAN],
 199 [AC_CACHE_CHECK([whether byte ordering is bigendian], ac_cv_c_bigendian,
 200 [ac_cv_c_bigendian=unknown
 201 # See if sys/param.h defines the BYTE_ORDER macro.
 202 AC_TRY_COMPILE([#include <sys/types.h>
 203 #include <sys/param.h>], [
 204 #if !BYTE_ORDER || !BIG_ENDIAN || !LITTLE_ENDIAN
 205  bogus endian macros
 206 #endif], [# It does; now see whether it defined to BIG_ENDIAN or not.
 207 AC_TRY_COMPILE([#include <sys/types.h>
 208 #include <sys/param.h>], [
 209 #if BYTE_ORDER != BIG_ENDIAN
 210  not big endian
 211 #endif], ac_cv_c_bigendian=yes, ac_cv_c_bigendian=no)])
 212 if test $ac_cv_c_bigendian = unknown; then
 213 AC_TRY_RUN([main () {
 214   /* Are we little or big endian?  From Harbison&Steele.  */
 215   union
 216   {
 217     long l;
 218     char c[sizeof (long)];
 219   } u;
 220   u.l = 1;
 221   exit (u.c[sizeof (long) - 1] == 1);
 222 }], [ac_cv_c_bigendian=no], [ac_cv_c_bigendian=yes], [ac_cv_c_bigendian=unknown])
 223 fi])
 224 if test $ac_cv_c_bigendian = unknown; then
 225   AC_MSG_WARN([Assuming little-endian target machine - this may be overriden by adding the line "ac_cv_c_bigendian=${ac_cv_c_bigendian='yes'}" to config.cache file])
 226 fi
 227 if test $ac_cv_c_bigendian = yes; then
 228   AC_DEFINE(WORDS_BIGENDIAN)
 229 fi
 230 ])
 231
 232 dnl ---------------------------------------------------------------------------
 233 dnl override AC_ARG_ENABLE/WITH to cache the results in .cache file
 234 dnl ---------------------------------------------------------------------------
 235
 236 AC_DEFUN([WX_ARG_CACHE_INIT],
 237         [
 238           wx_arg_cache_file="configarg.cache"
 239           echo "loading argument cache $wx_arg_cache_file"
 240           rm -f ${wx_arg_cache_file}.tmp
 241           touch ${wx_arg_cache_file}.tmp
 242           touch ${wx_arg_cache_file}
 243         ])
 244
 245 AC_DEFUN([WX_ARG_CACHE_FLUSH],
 246         [
 247           echo "saving argument cache $wx_arg_cache_file"
 248           mv ${wx_arg_cache_file}.tmp ${wx_arg_cache_file}
 249         ])
 250
 251 dnl this macro checks for a three-valued command line --with argument:
 252 dnl   possible arguments are 'yes', 'no', 'sys', or 'builtin'
 253 dnl usage: WX_ARG_SYS_WITH(option, helpmessage, variable-name)
 254 AC_DEFUN([WX_ARG_SYS_WITH],
 255         [
 256           AC_MSG_CHECKING([for --with-$1])
 257           no_cache=0
 258           AC_ARG_WITH($1, [$2],
 259                       [
 260                         if test "$withval" = yes; then
 261                           ac_cv_use_$1='$3=yes'
 262                         elif test "$withval" = no; then
 263                           ac_cv_use_$1='$3=no'
 264                         elif test "$withval" = sys; then
 265                           ac_cv_use_$1='$3=sys'
 266                         elif test "$withval" = builtin; then
 267                           ac_cv_use_$1='$3=builtin'
 268                         else
 269                           AC_MSG_ERROR([Invalid value for --with-$1: should be yes, no, sys, or builtin])
 270                         fi
 271                       ],
 272                       [
 273                         LINE=`grep "$3" ${wx_arg_cache_file}`
 274                         if test "x$LINE" != x ; then
 275                           eval "DEFAULT_$LINE"
 276                         else
 277                           no_cache=1
 278                         fi
 279
 280                         ac_cv_use_$1='$3='$DEFAULT_$3
 281                       ])
 282
 283           eval "$ac_cv_use_$1"
 284           if test "$no_cache" != 1; then
 285             echo $ac_cv_use_$1 >> ${wx_arg_cache_file}.tmp
 286           fi
 287
 288           if test "$$3" = yes; then
 289             AC_MSG_RESULT(yes)
 290           elif test "$$3" = no; then
 291             AC_MSG_RESULT(no)
 292           elif test "$$3" = sys; then
 293             AC_MSG_RESULT([system version])
 294           elif test "$$3" = builtin; then
 295             AC_MSG_RESULT([builtin version])
 296           else
 297             AC_MSG_ERROR([Invalid value for --with-$1: should be yes, no, sys, or builtin])
 298           fi
 299         ])
 300
 301 dnl this macro checks for a command line argument and caches the result
 302 dnl usage: WX_ARG_WITH(option, helpmessage, variable-name)
 303 AC_DEFUN([WX_ARG_WITH],
 304         [
 305           AC_MSG_CHECKING([for --with-$1])
 306           no_cache=0
 307           AC_ARG_WITH($1, [$2],
 308                       [
 309                         if test "$withval" = yes; then
 310                           ac_cv_use_$1='$3=yes'
 311                         else
 312                           ac_cv_use_$1='$3=no'
 313                         fi
 314                       ],
 315                       [
 316                         LINE=`grep "$3" ${wx_arg_cache_file}`
 317                         if test "x$LINE" != x ; then
 318                           eval "DEFAULT_$LINE"
 319                         else
 320                           no_cache=1
 321                         fi
 322
 323                         ac_cv_use_$1='$3='$DEFAULT_$3
 324                       ])
 325
 326           eval "$ac_cv_use_$1"
 327           if test "$no_cache" != 1; then
 328             echo $ac_cv_use_$1 >> ${wx_arg_cache_file}.tmp
 329           fi
 330
 331           if test "$$3" = yes; then
 332             AC_MSG_RESULT(yes)
 333           else
 334             AC_MSG_RESULT(no)
 335           fi
 336         ])
 337
 338 dnl like WX_ARG_WITH but uses AC_ARG_ENABLE instead of AC_ARG_WITH
 339 dnl usage: WX_ARG_ENABLE(option, helpmessage, variable-name)
 340 AC_DEFUN([WX_ARG_ENABLE],
 341         [
 342           AC_MSG_CHECKING([for --enable-$1])
 343           no_cache=0
 344           AC_ARG_ENABLE($1, [$2],
 345                         [
 346                           if test "$enableval" = yes; then
 347                             ac_cv_use_$1='$3=yes'
 348                           else
 349                             ac_cv_use_$1='$3=no'
 350                           fi
 351                         ],
 352                         [
 353                           LINE=`grep "$3" ${wx_arg_cache_file}`
 354                           if test "x$LINE" != x ; then
 355                             eval "DEFAULT_$LINE"
 356                           else
 357                             no_cache=1
 358                           fi
 359
 360                           ac_cv_use_$1='$3='$DEFAULT_$3
 361                         ])
 362
 363           eval "$ac_cv_use_$1"
 364           if test "$no_cache" != 1; then
 365             echo $ac_cv_use_$1 >> ${wx_arg_cache_file}.tmp
 366           fi
 367
 368           if test "$$3" = yes; then
 369             AC_MSG_RESULT(yes)
 370           else
 371             AC_MSG_RESULT(no)
 372           fi
 373         ])
 374
 375
 376
 377 dnl ===========================================================================
 378 dnl "3rd party" macros included here because they are not widely available
 379 dnl ===========================================================================
 380
 381 dnl ---------------------------------------------------------------------------
 382 dnl test for availability of iconv()
 383 dnl ---------------------------------------------------------------------------
 384
 385 dnl From Bruno Haible.
 386
 387 AC_DEFUN([AM_ICONV],
 388 [
 389   dnl Some systems have iconv in libc, some have it in libiconv (OSF/1 and
 390   dnl those with the standalone portable GNU libiconv installed).
 391
 392   AC_ARG_WITH([libiconv-prefix],
 393 [  --with-libiconv-prefix=DIR  search for libiconv in DIR/include and DIR/lib], [
 394     for dir in `echo "$withval" | tr : ' '`; do
 395       if test -d $dir/include; then CPPFLAGS="$CPPFLAGS -I$dir/include"; fi
 396       if test -d $dir/lib; then LDFLAGS="$LDFLAGS -L$dir/lib"; fi
 397     done
 398    ])
 399
 400   AC_CACHE_CHECK(for iconv, am_cv_func_iconv, [
 401     am_cv_func_iconv="no, consider installing GNU libiconv"
 402     am_cv_lib_iconv=no
 403     AC_TRY_LINK([#include <stdlib.h>
 404 #include <iconv.h>],
 405       [iconv_t cd = iconv_open("","");
 406        iconv(cd,NULL,NULL,NULL,NULL);
 407        iconv_close(cd);],
 408       am_cv_func_iconv=yes)
 409     if test "$am_cv_func_iconv" != yes; then
 410       am_save_LIBS="$LIBS"
 411       LIBS="$LIBS -liconv"
 412       AC_TRY_LINK([#include <stdlib.h>
 413 #include <iconv.h>],
 414         [iconv_t cd = iconv_open("","");
 415          iconv(cd,NULL,NULL,NULL,NULL);
 416          iconv_close(cd);],
 417         am_cv_lib_iconv=yes
 418         am_cv_func_iconv=yes)
 419       LIBS="$am_save_LIBS"
 420     fi
 421   ])
 422   if test "$am_cv_func_iconv" = yes; then
 423     AC_DEFINE(HAVE_ICONV, 1, [Define if you have the iconv() function.])
 424     AC_CACHE_CHECK([if iconv needs const], wx_cv_func_iconv_const,
 425       AC_TRY_COMPILE([
 426 #include <stdlib.h>
 427 #include <iconv.h>
 428 extern
 429 #ifdef __cplusplus
 430 "C"
 431 #endif
 432 #if defined(__STDC__) || defined(__cplusplus)
 433 size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
 434 #else
 435 size_t iconv();
 436 #endif
 437         ],
 438         [],
 439         wx_cv_func_iconv_const="no",
 440         wx_cv_func_iconv_const="yes"
 441       )
 442     )
 443
 444     iconv_const=
 445     if test "x$wx_cv_func_iconv_const" = "xyes"; then
 446         iconv_const="const"
 447     fi
 448
 449     AC_DEFINE_UNQUOTED(ICONV_CONST, $iconv_const,
 450       [Define as const if the declaration of iconv() needs const.])
 451   fi
 452   LIBICONV=
 453   if test "$am_cv_lib_iconv" = yes; then
 454     LIBICONV="-liconv"
 455   fi
 456   AC_SUBST(LIBICONV)
 457 ])
 458
 459 dnl ---------------------------------------------------------------------------
 460 dnl AC_SYS_LARGEFILE (partly based on the code from autoconf 2.5x)
 461 dnl ---------------------------------------------------------------------------
 462
 463 dnl WX_SYS_LARGEFILE_TEST
 464 dnl
 465 dnl NB: original autoconf test was checking if compiler supported 6 bit off_t
 466 dnl     arithmetic properly but this failed miserably with gcc under Linux
 467 dnl     whereas the system still supports 64 bit files, so now simply check
 468 dnl     that off_t is big enough
 469 define(WX_SYS_LARGEFILE_TEST,
 470 [typedef struct {
 471     unsigned int field: sizeof(off_t) == 8;
 472 } wxlf;
 473 ])
 474
 475
 476 dnl WX_SYS_LARGEFILE_MACRO_VALUE(C-MACRO, VALUE, CACHE-VAR)
 477 define(WX_SYS_LARGEFILE_MACRO_VALUE,
 478 [
 479     AC_CACHE_CHECK([for $1 value needed for large files], [$3],
 480         [
 481           AC_TRY_COMPILE([#define $1 $2
 482                           #include <sys/types.h>],
 483                          WX_SYS_LARGEFILE_TEST,
 484                          [$3=$2],
 485                          [$3=no])
 486         ]
 487     )
 488
 489     if test "$$3" != no; then
 490         wx_largefile=yes
 491         AC_DEFINE_UNQUOTED([$1], [$$3])
 492     fi
 493 ])
 494
 495
 496 dnl AC_SYS_LARGEFILE
 497 dnl ----------------
 498 dnl By default, many hosts won't let programs access large files;
 499 dnl one must use special compiler options to get large-file access to work.
 500 dnl For more details about this brain damage please see:
 501 dnl http://www.sas.com/standards/large.file/x_open.20Mar96.html
 502 AC_DEFUN([AC_SYS_LARGEFILE],
 503 [AC_ARG_ENABLE(largefile,
 504                [  --disable-largefile     omit support for large files])
 505 if test "$enable_largefile" != no; then
 506     dnl _FILE_OFFSET_BITS==64 is needed for Linux, Solaris, ...
 507     dnl _LARGE_FILES -- for AIX
 508     wx_largefile=no
 509     WX_SYS_LARGEFILE_MACRO_VALUE(_FILE_OFFSET_BITS, 64, ac_cv_sys_file_offset_bits)
 510     if test "x$wx_largefile" != "xyes"; then
 511         WX_SYS_LARGEFILE_MACRO_VALUE(_LARGE_FILES, 1, ac_cv_sys_large_files)
 512     fi
 513
 514     AC_MSG_CHECKING(if large file support is available)
 515     if test "x$wx_largefile" = "xyes"; then
 516         AC_DEFINE(HAVE_LARGEFILE_SUPPORT)
 517     fi
 518     AC_MSG_RESULT($wx_largefile)
 519 fi
 520 ])