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  1. # Configure paths for SDL
  2. # Sam Lantinga 9/21/99
  3. # stolen from Manish Singh
  4. # stolen back from Frank Belew
  5. # stolen from Manish Singh
  6. # Shamelessly stolen from Owen Taylor
  7.  
  8. dnl AM_PATH_SDL([MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]])
  9. dnl Test for SDL, and define SDL_CFLAGS and SDL_LIBS
  10. dnl
  11. AC_DEFUN(AM_PATH_SDL,
  12. [dnl
  13. dnl Get the cflags and libraries from the sdl-config script
  14. dnl
  15. AC_ARG_WITH(sdl-prefix,[  --with-sdl-prefix=PFX   Prefix where SDL is installed (optional)],
  16.             sdl_prefix="$withval", sdl_prefix="")
  17. AC_ARG_WITH(sdl-exec-prefix,[  --with-sdl-exec-prefix=PFX Exec prefix where SDL is installed (optional)],
  18.             sdl_exec_prefix="$withval", sdl_exec_prefix="")
  19. AC_ARG_ENABLE(sdltest, [  --disable-sdltest       Do not try to compile and run a test SDL program],
  20.                     , enable_sdltest=yes)
  21.  
  22.   if test x$sdl_exec_prefix != x ; then
  23.      sdl_args="$sdl_args --exec-prefix=$sdl_exec_prefix"
  24.      if test x${SDL_CONFIG+set} != xset ; then
  25.         SDL_CONFIG=$sdl_exec_prefix/bin/sdl-config
  26.      fi
  27.   fi
  28.   if test x$sdl_prefix != x ; then
  29.      sdl_args="$sdl_args --prefix=$sdl_prefix"
  30.      if test x${SDL_CONFIG+set} != xset ; then
  31.         SDL_CONFIG=$sdl_prefix/bin/sdl-config
  32.      fi
  33.   fi
  34.  
  35.   AC_PATH_PROG(SDL_CONFIG, sdl-config, no)
  36.   min_sdl_version=ifelse([$1], ,0.11.0,$1)
  37.   AC_MSG_CHECKING(for SDL - version >= $min_sdl_version)
  38.   no_sdl=""
  39.   if test "$SDL_CONFIG" = "no" ; then
  40.     no_sdl=yes
  41.   else
  42.     SDL_CFLAGS=`$SDL_CONFIG $sdlconf_args --cflags`
  43.     SDL_LIBS=`$SDL_CONFIG $sdlconf_args --libs`
  44.  
  45.     sdl_major_version=`$SDL_CONFIG $sdl_args --version | \
  46.            sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
  47.     sdl_minor_version=`$SDL_CONFIG $sdl_args --version | \
  48.            sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
  49.     sdl_micro_version=`$SDL_CONFIG $sdl_config_args --version | \
  50.            sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
  51.     if test "x$enable_sdltest" = "xyes" ; then
  52.       ac_save_CFLAGS="$CFLAGS"
  53.       ac_save_LIBS="$LIBS"
  54.       CFLAGS="$CFLAGS $SDL_CFLAGS"
  55.       LIBS="$LIBS $SDL_LIBS"
  56. dnl
  57. dnl Now check if the installed SDL is sufficiently new. (Also sanity
  58. dnl checks the results of sdl-config to some extent
  59. dnl
  60.       rm -f conf.sdltest
  61.       AC_TRY_RUN([
  62. #include <stdio.h>
  63. #include <stdlib.h>
  64. #include <string.h>
  65. #include "SDL.h"
  66.  
  67. char*
  68. my_strdup (char *str)
  69. {
  70.   char *new_str;
  71.  
  72.   if (str)
  73.     {
  74.       new_str = malloc ((strlen (str) + 1) * sizeof(char));
  75.       strcpy (new_str, str);
  76.     }
  77.   else
  78.     new_str = NULL;
  79.  
  80.   return new_str;
  81. }
  82.  
  83. int main ()
  84. {
  85.   int major, minor, micro;
  86.   char *tmp_version;
  87.  
  88.   system ("touch conf.sdltest");
  89.  
  90.   /* HP/UX 9 (%@#!) writes to sscanf strings */
  91.   tmp_version = my_strdup("$min_sdl_version");
  92.   if (sscanf(tmp_version, "%d.%d.%d", &major, &minor, &micro) != 3) {
  93.      printf("%s, bad version string\n", "$min_sdl_version");
  94.      exit(1);
  95.    }
  96.  
  97.    if (($sdl_major_version > major) ||
  98.       (($sdl_major_version == major) && ($sdl_minor_version > minor)) ||
  99.       (($sdl_major_version == major) && ($sdl_minor_version == minor) && ($sdl_micro_version >= micro)))
  100.     {
  101.       return 0;
  102.     }
  103.   else
  104.     {
  105.       printf("\n*** 'sdl-config --version' returned %d.%d.%d, but the minimum version\n", $sdl_major_version, $sdl_minor_version, $sdl_micro_version);
  106.       printf("*** of SDL required is %d.%d.%d. If sdl-config is correct, then it is\n", major, minor, micro);
  107.       printf("*** best to upgrade to the required version.\n");
  108.       printf("*** If sdl-config was wrong, set the environment variable SDL_CONFIG\n");
  109.       printf("*** to point to the correct copy of sdl-config, and remove the file\n");
  110.       printf("*** config.cache before re-running configure\n");
  111.       return 1;
  112.     }
  113. }
  114.  
  115. ],, no_sdl=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])
  116.        CFLAGS="$ac_save_CFLAGS"
  117.        LIBS="$ac_save_LIBS"
  118.      fi
  119.   fi
  120.   if test "x$no_sdl" = x ; then
  121.      AC_MSG_RESULT(yes)
  122.      ifelse([$2], , :, [$2])    
  123.   else
  124.      AC_MSG_RESULT(no)
  125.      if test "$SDL_CONFIG" = "no" ; then
  126.        echo "*** The sdl-config script installed by SDL could not be found"
  127.        echo "*** If SDL was installed in PREFIX, make sure PREFIX/bin is in"
  128.        echo "*** your path, or set the SDL_CONFIG environment variable to the"
  129.        echo "*** full path to sdl-config."
  130.      else
  131.        if test -f conf.sdltest ; then
  132.         :
  133.        else
  134.           echo "*** Could not run SDL test program, checking why..."
  135.           CFLAGS="$CFLAGS $SDL_CFLAGS"
  136.           LIBS="$LIBS $SDL_LIBS"
  137.           AC_TRY_LINK([
  138. #include <stdio.h>
  139. #include "SDL.h"
  140. ],      [ return 0; ],
  141.         [ echo "*** The test program compiled, but did not run. This usually means"
  142.           echo "*** that the run-time linker is not finding SDL or finding the wrong"
  143.           echo "*** version of SDL. If it is not finding SDL, you'll need to set your"
  144.           echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point"
  145.           echo "*** to the installed location  Also, make sure you have run ldconfig if that"
  146.           echo "*** is required on your system"
  147.           echo "***"
  148.           echo "*** If you have an old version installed, it is best to remove it, although"
  149.           echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH"],
  150.         [ echo "*** The test program failed to compile or link. See the file config.log for the"
  151.           echo "*** exact error that occured. This usually means SDL was incorrectly installed"
  152.           echo "*** or that you have moved SDL since it was installed. In the latter case, you"
  153.           echo "*** may want to edit the sdl-config script: $SDL_CONFIG" ])
  154.           CFLAGS="$ac_save_CFLAGS"
  155.           LIBS="$ac_save_LIBS"
  156.        fi
  157.      fi
  158.      SDL_CFLAGS=""
  159.      SDL_LIBS=""
  160.      ifelse([$3], , :, [$3])
  161.   fi
  162.   AC_SUBST(SDL_CFLAGS)
  163.   AC_SUBST(SDL_LIBS)
  164.   rm -f conf.sdltest
  165. ])
  166.