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 a slightly better AC_C_BIGENDIAN macro which allows cross-compiling
 149 dnl ---------------------------------------------------------------------------
 150
 151 AC_DEFUN([WX_C_BIGENDIAN],
 152 [AC_CACHE_CHECK([whether byte ordering is bigendian], ac_cv_c_bigendian,
 153 [ac_cv_c_bigendian=unknown
 154 # See if sys/param.h defines the BYTE_ORDER macro.
 155 AC_TRY_COMPILE([#include <sys/types.h>
 156 #include <sys/param.h>], [
 157 #if !BYTE_ORDER || !BIG_ENDIAN || !LITTLE_ENDIAN
 158  bogus endian macros
 159 #endif], [# It does; now see whether it defined to BIG_ENDIAN or not.
 160 AC_TRY_COMPILE([#include <sys/types.h>
 161 #include <sys/param.h>], [
 162 #if BYTE_ORDER != BIG_ENDIAN
 163  not big endian
 164 #endif], ac_cv_c_bigendian=yes, ac_cv_c_bigendian=no)])
 165 if test $ac_cv_c_bigendian = unknown; then
 166 AC_TRY_RUN([main () {
 167   /* Are we little or big endian?  From Harbison&Steele.  */
 168   union
 169   {
 170     long l;
 171     char c[sizeof (long)];
 172   } u;
 173   u.l = 1;
 174   exit (u.c[sizeof (long) - 1] == 1);
 175 }], [ac_cv_c_bigendian=no], [ac_cv_c_bigendian=yes], [ac_cv_c_bigendian=unknown])
 176 fi])
 177 if test $ac_cv_c_bigendian = unknown; then
 178   AC_MSG_WARN([Assuming little-endian target machine - this may be overriden by adding the line "ac_cv_c_bigendian=${ac_cv_c_bigendian='yes'}" to config.cache file])
 179 fi
 180 if test $ac_cv_c_bigendian = yes; then
 181   AC_DEFINE(WORDS_BIGENDIAN)
 182 fi
 183 ])
 184
 185 dnl ---------------------------------------------------------------------------
 186 dnl override AC_ARG_ENABLE/WITH to cache the results in .cache file
 187 dnl ---------------------------------------------------------------------------
 188
 189 AC_DEFUN([WX_ARG_CACHE_INIT],
 190         [
 191           wx_arg_cache_file="configarg.cache"
 192           echo "loading argument cache $wx_arg_cache_file"
 193           rm -f ${wx_arg_cache_file}.tmp
 194           touch ${wx_arg_cache_file}.tmp
 195           touch ${wx_arg_cache_file}
 196         ])
 197
 198 AC_DEFUN([WX_ARG_CACHE_FLUSH],
 199         [
 200           echo "saving argument cache $wx_arg_cache_file"
 201           mv ${wx_arg_cache_file}.tmp ${wx_arg_cache_file}
 202         ])
 203
 204 dnl this macro checks for a three-valued command line --with argument:
 205 dnl   possible arguments are 'yes', 'no', 'sys', or 'builtin'
 206 dnl usage: WX_ARG_SYS_WITH(option, helpmessage, variable-name)
 207 AC_DEFUN([WX_ARG_SYS_WITH],
 208         [
 209           AC_MSG_CHECKING([for --with-$1])
 210           no_cache=0
 211           AC_ARG_WITH($1, [$2],
 212                       [
 213                         if test "$withval" = yes; then
 214                           ac_cv_use_$1='$3=yes'
 215                         elif test "$withval" = no; then
 216                           ac_cv_use_$1='$3=no'
 217                         elif test "$withval" = sys; then
 218                           ac_cv_use_$1='$3=sys'
 219                         elif test "$withval" = builtin; then
 220                           ac_cv_use_$1='$3=builtin'
 221                         else
 222                           AC_MSG_ERROR([Invalid value for --with-$1: should be yes, no, sys, or builtin])
 223                         fi
 224                       ],
 225                       [
 226                         LINE=`grep "$3" ${wx_arg_cache_file}`
 227                         if test "x$LINE" != x ; then
 228                           eval "DEFAULT_$LINE"
 229                         else
 230                           no_cache=1
 231                         fi
 232
 233                         ac_cv_use_$1='$3='$DEFAULT_$3
 234                       ])
 235
 236           eval "$ac_cv_use_$1"
 237           if test "$no_cache" != 1; then
 238             echo $ac_cv_use_$1 >> ${wx_arg_cache_file}.tmp
 239           fi
 240
 241           if test "$$3" = yes; then
 242             AC_MSG_RESULT(yes)
 243           elif test "$$3" = no; then
 244             AC_MSG_RESULT(no)
 245           elif test "$$3" = sys; then
 246             AC_MSG_RESULT([system version])
 247           elif test "$$3" = builtin; then
 248             AC_MSG_RESULT([builtin version])
 249           else
 250             AC_MSG_ERROR([Invalid value for --with-$1: should be yes, no, sys, or builtin])
 251           fi
 252         ])
 253
 254 dnl this macro checks for a command line argument and caches the result
 255 dnl usage: WX_ARG_WITH(option, helpmessage, variable-name)
 256 AC_DEFUN([WX_ARG_WITH],
 257         [
 258           AC_MSG_CHECKING([for --with-$1])
 259           no_cache=0
 260           AC_ARG_WITH($1, [$2],
 261                       [
 262                         if test "$withval" = yes; then
 263                           ac_cv_use_$1='$3=yes'
 264                         else
 265                           ac_cv_use_$1='$3=no'
 266                         fi
 267                       ],
 268                       [
 269                         LINE=`grep "$3" ${wx_arg_cache_file}`
 270                         if test "x$LINE" != x ; then
 271                           eval "DEFAULT_$LINE"
 272                         else
 273                           no_cache=1
 274                         fi
 275
 276                         ac_cv_use_$1='$3='$DEFAULT_$3
 277                       ])
 278
 279           eval "$ac_cv_use_$1"
 280           if test "$no_cache" != 1; then
 281             echo $ac_cv_use_$1 >> ${wx_arg_cache_file}.tmp
 282           fi
 283
 284           if test "$$3" = yes; then
 285             AC_MSG_RESULT(yes)
 286           else
 287             AC_MSG_RESULT(no)
 288           fi
 289         ])
 290
 291 dnl like WX_ARG_WITH but uses AC_ARG_ENABLE instead of AC_ARG_WITH
 292 dnl usage: WX_ARG_ENABLE(option, helpmessage, variable-name)
 293 AC_DEFUN([WX_ARG_ENABLE],
 294         [
 295           AC_MSG_CHECKING([for --enable-$1])
 296           no_cache=0
 297           AC_ARG_ENABLE($1, [$2],
 298                         [
 299                           if test "$enableval" = yes; then
 300                             ac_cv_use_$1='$3=yes'
 301                           else
 302                             ac_cv_use_$1='$3=no'
 303                           fi
 304                         ],
 305                         [
 306                           LINE=`grep "$3" ${wx_arg_cache_file}`
 307                           if test "x$LINE" != x ; then
 308                             eval "DEFAULT_$LINE"
 309                           else
 310                             no_cache=1
 311                           fi
 312
 313                           ac_cv_use_$1='$3='$DEFAULT_$3
 314                         ])
 315
 316           eval "$ac_cv_use_$1"
 317           if test "$no_cache" != 1; then
 318             echo $ac_cv_use_$1 >> ${wx_arg_cache_file}.tmp
 319           fi
 320
 321           if test "$$3" = yes; then
 322             AC_MSG_RESULT(yes)
 323           else
 324             AC_MSG_RESULT(no)
 325           fi
 326         ])
 327
 328
 329
 330 dnl ===========================================================================
 331 dnl "3rd party" macros included here because they are not widely available
 332 dnl ===========================================================================
 333
 334 dnl ---------------------------------------------------------------------------
 335 dnl test for availability of iconv()
 336 dnl ---------------------------------------------------------------------------
 337
 338 dnl From Bruno Haible.
 339
 340 AC_DEFUN([AM_ICONV],
 341 [
 342   dnl Some systems have iconv in libc, some have it in libiconv (OSF/1 and
 343   dnl those with the standalone portable GNU libiconv installed).
 344
 345   AC_ARG_WITH([libiconv-prefix],
 346 [  --with-libiconv-prefix=DIR  search for libiconv in DIR/include and DIR/lib], [
 347     for dir in `echo "$withval" | tr : ' '`; do
 348       if test -d $dir/include; then CPPFLAGS="$CPPFLAGS -I$dir/include"; fi
 349       if test -d $dir/lib; then LDFLAGS="$LDFLAGS -L$dir/lib"; fi
 350     done
 351    ])
 352
 353   AC_CACHE_CHECK(for iconv, am_cv_func_iconv, [
 354     am_cv_func_iconv="no, consider installing GNU libiconv"
 355     am_cv_lib_iconv=no
 356     AC_TRY_LINK([#include <stdlib.h>
 357 #include <iconv.h>],
 358       [iconv_t cd = iconv_open("","");
 359        iconv(cd,NULL,NULL,NULL,NULL);
 360        iconv_close(cd);],
 361       am_cv_func_iconv=yes)
 362     if test "$am_cv_func_iconv" != yes; then
 363       am_save_LIBS="$LIBS"
 364       LIBS="$LIBS -liconv"
 365       AC_TRY_LINK([#include <stdlib.h>
 366 #include <iconv.h>],
 367         [iconv_t cd = iconv_open("","");
 368          iconv(cd,NULL,NULL,NULL,NULL);
 369          iconv_close(cd);],
 370         am_cv_lib_iconv=yes
 371         am_cv_func_iconv=yes)
 372       LIBS="$am_save_LIBS"
 373     fi
 374   ])
 375   if test "$am_cv_func_iconv" = yes; then
 376     AC_DEFINE(HAVE_ICONV, 1, [Define if you have the iconv() function.])
 377     AC_CACHE_CHECK([if iconv needs const], wx_cv_func_iconv_const,
 378       AC_TRY_COMPILE([
 379 #include <stdlib.h>
 380 #include <iconv.h>
 381 extern
 382 #ifdef __cplusplus
 383 "C"
 384 #endif
 385 #if defined(__STDC__) || defined(__cplusplus)
 386 size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
 387 #else
 388 size_t iconv();
 389 #endif
 390         ],
 391         [],
 392         wx_cv_func_iconv_const="no",
 393         wx_cv_func_iconv_const="yes"
 394       )
 395     )
 396
 397     iconv_const=
 398     if test "x$wx_cv_func_iconv_const" = "xyes"; then
 399         iconv_const="const"
 400     fi
 401
 402     AC_DEFINE_UNQUOTED(ICONV_CONST, $iconv_const,
 403       [Define as const if the declaration of iconv() needs const.])
 404   fi
 405   LIBICONV=
 406   if test "$am_cv_lib_iconv" = yes; then
 407     LIBICONV="-liconv"
 408   fi
 409   AC_SUBST(LIBICONV)
 410 ])
 411
 412 dnl ---------------------------------------------------------------------------
 413 dnl AC_SYS_LARGEFILE (partly based on the code from autoconf 2.5x)
 414 dnl ---------------------------------------------------------------------------
 415
 416 dnl WX_SYS_LARGEFILE_TEST
 417 dnl
 418 dnl NB: original autoconf test was checking if compiler supported 6 bit off_t
 419 dnl     arithmetic properly but this failed miserably with gcc under Linux
 420 dnl     whereas the system still supports 64 bit files, so now simply check
 421 dnl     that off_t is big enough
 422 define(WX_SYS_LARGEFILE_TEST,
 423 [typedef struct {
 424     unsigned int field: sizeof(off_t) == 8;
 425 } wxlf;
 426 ])
 427
 428
 429 dnl WX_SYS_LARGEFILE_MACRO_VALUE(C-MACRO, VALUE, CACHE-VAR)
 430 define(WX_SYS_LARGEFILE_MACRO_VALUE,
 431 [
 432     AC_CACHE_CHECK([for $1 value needed for large files], [$3],
 433         [
 434           AC_TRY_COMPILE([#define $1 $2
 435                           #include <sys/types.h>],
 436                          WX_SYS_LARGEFILE_TEST,
 437                          [$3=$2],
 438                          [$3=no])
 439         ]
 440     )
 441
 442     if test "$$3" != no; then
 443         wx_largefile=yes
 444         AC_DEFINE_UNQUOTED([$1], [$$3])
 445     fi
 446 ])
 447
 448
 449 dnl AC_SYS_LARGEFILE
 450 dnl ----------------
 451 dnl By default, many hosts won't let programs access large files;
 452 dnl one must use special compiler options to get large-file access to work.
 453 dnl For more details about this brain damage please see:
 454 dnl http://www.sas.com/standards/large.file/x_open.20Mar96.html
 455 AC_DEFUN([AC_SYS_LARGEFILE],
 456 [AC_ARG_ENABLE(largefile,
 457                [  --disable-largefile     omit support for large files])
 458 if test "$enable_largefile" != no; then
 459     dnl _FILE_OFFSET_BITS==64 is needed for Linux, Solaris, ...
 460     dnl _LARGE_FILES -- for AIX
 461     wx_largefile=no
 462     WX_SYS_LARGEFILE_MACRO_VALUE(_FILE_OFFSET_BITS, 64, ac_cv_sys_file_offset_bits)
 463     if test "x$wx_largefile" != "xyes"; then
 464         WX_SYS_LARGEFILE_MACRO_VALUE(_LARGE_FILES, 1, ac_cv_sys_large_files)
 465     fi
 466
 467     AC_MSG_CHECKING(if large file support is available)
 468     if test "x$wx_largefile" = "xyes"; then
 469         AC_DEFINE(HAVE_LARGEFILE_SUPPORT)
 470     fi
 471     AC_MSG_RESULT($wx_largefile)
 472 fi
 473 ])