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
 335 dnl ---------------------------------------------------------------------------
 336 dnl test for availability of iconv()
 337 dnl ---------------------------------------------------------------------------
 338
 339 #serial AM2
 340
 341 dnl From Bruno Haible.
 342
 343 AC_DEFUN([AM_ICONV],
 344 [
 345   dnl Some systems have iconv in libc, some have it in libiconv (OSF/1 and
 346   dnl those with the standalone portable GNU libiconv installed).
 347
 348   AC_ARG_WITH([libiconv-prefix],
 349 [  --with-libiconv-prefix=DIR  search for libiconv in DIR/include and DIR/lib], [
 350     for dir in `echo "$withval" | tr : ' '`; do
 351       if test -d $dir/include; then CPPFLAGS="$CPPFLAGS -I$dir/include"; fi
 352       if test -d $dir/lib; then LDFLAGS="$LDFLAGS -L$dir/lib"; fi
 353     done
 354    ])
 355
 356   AC_CACHE_CHECK(for iconv, am_cv_func_iconv, [
 357     am_cv_func_iconv="no, consider installing GNU libiconv"
 358     am_cv_lib_iconv=no
 359     AC_TRY_LINK([#include <stdlib.h>
 360 #include <iconv.h>],
 361       [iconv_t cd = iconv_open("","");
 362        iconv(cd,NULL,NULL,NULL,NULL);
 363        iconv_close(cd);],
 364       am_cv_func_iconv=yes)
 365     if test "$am_cv_func_iconv" != yes; then
 366       am_save_LIBS="$LIBS"
 367       LIBS="$LIBS -liconv"
 368       AC_TRY_LINK([#include <stdlib.h>
 369 #include <iconv.h>],
 370         [iconv_t cd = iconv_open("","");
 371          iconv(cd,NULL,NULL,NULL,NULL);
 372          iconv_close(cd);],
 373         am_cv_lib_iconv=yes
 374         am_cv_func_iconv=yes)
 375       LIBS="$am_save_LIBS"
 376     fi
 377   ])
 378   if test "$am_cv_func_iconv" = yes; then
 379     AC_DEFINE(HAVE_ICONV, 1, [Define if you have the iconv() function.])
 380     AC_MSG_CHECKING([for iconv declaration])
 381     AC_CACHE_VAL(am_cv_proto_iconv, [
 382       AC_TRY_COMPILE([
 383 #include <stdlib.h>
 384 #include <iconv.h>
 385 extern
 386 #ifdef __cplusplus
 387 "C"
 388 #endif
 389 #if defined(__STDC__) || defined(__cplusplus)
 390 size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
 391 #else
 392 size_t iconv();
 393 #endif
 394 ], [], am_cv_proto_iconv_arg1="", am_cv_proto_iconv_arg1="const")
 395       am_cv_proto_iconv="extern size_t iconv (iconv_t cd, $am_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);"])
 396     am_cv_proto_iconv=`echo "[$]am_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'`
 397     AC_MSG_RESULT([$]{ac_t:-
 398          }[$]am_cv_proto_iconv)
 399     AC_DEFINE_UNQUOTED(ICONV_CONST, $am_cv_proto_iconv_arg1,
 400       [Define as const if the declaration of iconv() needs const.])
 401   fi
 402   LIBICONV=
 403   if test "$am_cv_lib_iconv" = yes; then
 404     LIBICONV="-liconv"
 405   fi
 406   AC_SUBST(LIBICONV)
 407 ])
 408
 409
 410 dnl ---------------------------------------------------------------------------
 411 dnl test for GTK+ 2.0
 412 dnl ---------------------------------------------------------------------------
 413
 414 dnl AM_PATH_GTK_2_0([MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND [, MODULES]]]])
 415 dnl Test for GTK, and define GTK_CFLAGS and GTK_LIBS
 416 dnl
 417 AC_DEFUN(AM_PATH_GTK_2_0,
 418 [dnl
 419 dnl Get the cflags and libraries from the gtk-config-2.0 script
 420 dnl
 421 AC_ARG_WITH(gtk-prefix,[  --with-gtk-prefix=PFX   Prefix where GTK is installed (optional)],
 422             gtk_config_prefix="$withval", gtk_config_prefix="")
 423 AC_ARG_WITH(gtk-exec-prefix,[  --with-gtk-exec-prefix=PFX Exec prefix where GTK is installed (optional)],
 424             gtk_config_exec_prefix="$withval", gtk_config_exec_prefix="")
 425 AC_ARG_ENABLE(gtktest, [  --disable-gtktest       Do not try to compile and run a test GTK program],
 426                     , enable_gtktest=yes)
 427
 428   for module in . $4
 429   do
 430       case "$module" in
 431          gthread)
 432              gtk_config_args="$gtk_config_args gthread"
 433          ;;
 434       esac
 435   done
 436
 437   if test x$gtk_config_exec_prefix != x ; then
 438      gtk_config_args="$gtk_config_args --exec-prefix=$gtk_config_exec_prefix"
 439      if test x${GTK_CONFIG_2_0+set} != xset ; then
 440         GTK_CONFIG_2_0=$gtk_config_exec_prefix/bin/gtk-config-2.0
 441      fi
 442   fi
 443   if test x$gtk_config_prefix != x ; then
 444      gtk_config_args="$gtk_config_args --prefix=$gtk_config_prefix"
 445      if test x${GTK_CONFIG_2_0+set} != xset ; then
 446         GTK_CONFIG_2_0=$gtk_config_prefix/bin/gtk-config-2.0
 447      fi
 448   fi
 449
 450   AC_PATH_PROG(GTK_CONFIG_2_0, gtk-config-2.0, no)
 451   min_gtk_version=ifelse([$1], ,1.3.1,$1)
 452   AC_MSG_CHECKING(for GTK - version >= $min_gtk_version)
 453   no_gtk=""
 454   if test "$GTK_CONFIG_2_0" = "no" ; then
 455     no_gtk=yes
 456   else
 457     GTK_CFLAGS=`$GTK_CONFIG_2_0 $gtk_config_args --cflags`
 458     GTK_LIBS=`$GTK_CONFIG_2_0 $gtk_config_args --libs`
 459     gtk_config_major_version=`$GTK_CONFIG_2_0 $gtk_config_args --version | \
 460            sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
 461     gtk_config_minor_version=`$GTK_CONFIG_2_0 $gtk_config_args --version | \
 462            sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
 463     gtk_config_micro_version=`$GTK_CONFIG_2_0 $gtk_config_args --version | \
 464            sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
 465     if test "x$enable_gtktest" = "xyes" ; then
 466       ac_save_CFLAGS="$CFLAGS"
 467       ac_save_LIBS="$LIBS"
 468       CFLAGS="$CFLAGS $GTK_CFLAGS"
 469       LIBS="$GTK_LIBS $LIBS"
 470 dnl
 471 dnl Now check if the installed GTK is sufficiently new. (Also sanity
 472 dnl checks the results of gtk-config-2.0 to some extent
 473 dnl
 474       rm -f conf.gtktest
 475       AC_TRY_RUN([
 476 #include <gtk/gtk.h>
 477 #include <stdio.h>
 478 #include <stdlib.h>
 479
 480 int
 481 main ()
 482 {
 483   int major, minor, micro;
 484   char *tmp_version;
 485
 486   system ("touch conf.gtktest");
 487
 488   /* HP/UX 9 (%@#!) writes to sscanf strings */
 489   tmp_version = g_strdup("$min_gtk_version");
 490   if (sscanf(tmp_version, "%d.%d.%d", &major, &minor, &micro) != 3) {
 491      printf("%s, bad version string\n", "$min_gtk_version");
 492      exit(1);
 493    }
 494
 495   if ((gtk_major_version != $gtk_config_major_version) ||
 496       (gtk_minor_version != $gtk_config_minor_version) ||
 497       (gtk_micro_version != $gtk_config_micro_version))
 498     {
 499       printf("\n*** 'gtk-config-2.0 --version' returned %d.%d.%d, but GTK+ (%d.%d.%d)\n",
 500              $gtk_config_major_version, $gtk_config_minor_version, $gtk_config_micro_version,
 501              gtk_major_version, gtk_minor_version, gtk_micro_version);
 502       printf ("*** was found! If gtk-config-2.0 was correct, then it is best\n");
 503       printf ("*** to remove the old version of GTK+. You may also be able to fix the error\n");
 504       printf("*** by modifying your LD_LIBRARY_PATH enviroment variable, or by editing\n");
 505       printf("*** /etc/ld.so.conf. Make sure you have run ldconfig if that is\n");
 506       printf("*** required on your system.\n");
 507       printf("*** If gtk-config-2.0 was wrong, set the environment variable GTK_CONFIG_2_0\n");
 508       printf("*** to point to the correct copy of gtk-config-2.0, and remove the file config.cache\n");
 509       printf("*** before re-running configure\n");
 510     }
 511 #if defined (GTK_MAJOR_VERSION) && defined (GTK_MINOR_VERSION) && defined (GTK_MICRO_VERSION)
 512   else if ((gtk_major_version != GTK_MAJOR_VERSION) ||
 513            (gtk_minor_version != GTK_MINOR_VERSION) ||
 514            (gtk_micro_version != GTK_MICRO_VERSION))
 515     {
 516       printf("*** GTK+ header files (version %d.%d.%d) do not match\n",
 517              GTK_MAJOR_VERSION, GTK_MINOR_VERSION, GTK_MICRO_VERSION);
 518       printf("*** library (version %d.%d.%d)\n",
 519              gtk_major_version, gtk_minor_version, gtk_micro_version);
 520     }
 521 #endif /* defined (GTK_MAJOR_VERSION) ... */
 522   else
 523     {
 524       if ((gtk_major_version > major) ||
 525         ((gtk_major_version == major) && (gtk_minor_version > minor)) ||
 526         ((gtk_major_version == major) && (gtk_minor_version == minor) && (gtk_micro_version >= micro)))
 527       {
 528         return 0;
 529        }
 530      else
 531       {
 532         printf("\n*** An old version of GTK+ (%d.%d.%d) was found.\n",
 533                gtk_major_version, gtk_minor_version, gtk_micro_version);
 534         printf("*** You need a version of GTK+ newer than %d.%d.%d. The latest version of\n",
 535                major, minor, micro);
 536         printf("*** GTK+ is always available from ftp://ftp.gtk.org.\n");
 537         printf("***\n");
 538         printf("*** If you have already installed a sufficiently new version, this error\n");
 539         printf("*** probably means that the wrong copy of the gtk-config-2.0 shell script is\n");
 540         printf("*** being found. The easiest way to fix this is to remove the old version\n");
 541         printf("*** of GTK+, but you can also set the GTK_CONFIG_2_0 environment to point to the\n");
 542         printf("*** correct copy of gtk-config-2.0. (In this case, you will have to\n");
 543         printf("*** modify your LD_LIBRARY_PATH enviroment variable, or edit /etc/ld.so.conf\n");
 544         printf("*** so that the correct libraries are found at run-time))\n");
 545       }
 546     }
 547   return 1;
 548 }
 549 ],, no_gtk=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])
 550        CFLAGS="$ac_save_CFLAGS"
 551        LIBS="$ac_save_LIBS"
 552      fi
 553   fi
 554   if test "x$no_gtk" = x ; then
 555      AC_MSG_RESULT(yes (version $gtk_config_major_version.$gtk_config_minor_version.$gtk_config_micro_version))
 556      ifelse([$2], , :, [$2])
 557   else
 558      AC_MSG_RESULT(no)
 559      if test "$GTK_CONFIG_2_0" = "no" ; then
 560        echo "*** The gtk-config-2.0 script installed by GTK could not be found"
 561        echo "*** If GTK was installed in PREFIX, make sure PREFIX/bin is in"
 562        echo "*** your path, or set the GTK_CONFIG_2_0 environment variable to the"
 563        echo "*** full path to gtk-config-2.0."
 564      else
 565        if test -f conf.gtktest ; then
 566         :
 567        else
 568           echo "*** Could not run GTK test program, checking why..."
 569           CFLAGS="$CFLAGS $GTK_CFLAGS"
 570           LIBS="$LIBS $GTK_LIBS"
 571           AC_TRY_LINK([
 572 #include <gtk/gtk.h>
 573 #include <stdio.h>
 574 ],      [ return ((gtk_major_version) || (gtk_minor_version) || (gtk_micro_version)); ],
 575         [ echo "*** The test program compiled, but did not run. This usually means"
 576           echo "*** that the run-time linker is not finding GTK or finding the wrong"
 577           echo "*** version of GTK. If it is not finding GTK, you'll need to set your"
 578           echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point"
 579           echo "*** to the installed location  Also, make sure you have run ldconfig if that"
 580           echo "*** is required on your system"
 581           echo "***"
 582           echo "*** If you have an old version installed, it is best to remove it, although"
 583           echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH"
 584           echo "***"
 585           echo "*** If you have a RedHat 5.0 system, you should remove the GTK package that"
 586           echo "*** came with the system with the command"
 587           echo "***"
 588           echo "***    rpm --erase --nodeps gtk gtk-devel" ],
 589         [ echo "*** The test program failed to compile or link. See the file config.log for the"
 590           echo "*** exact error that occured. This usually means GTK was incorrectly installed"
 591           echo "*** or that you have moved GTK since it was installed. In the latter case, you"
 592           echo "*** may want to edit the gtk-config-2.0 script: $GTK_CONFIG_2_0" ])
 593           CFLAGS="$ac_save_CFLAGS"
 594           LIBS="$ac_save_LIBS"
 595        fi
 596      fi
 597      GTK_CFLAGS=""
 598      GTK_LIBS=""
 599      ifelse([$3], , :, [$3])
 600   fi
 601   AC_SUBST(GTK_CFLAGS)
 602   AC_SUBST(GTK_LIBS)
 603   rm -f conf.gtktest
 604 ])