sdl.m4
changeset 0 74212992fb08
child 1 cf2af46e9e2a
equal deleted inserted replaced
-1:000000000000 0:74212992fb08
       
     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 = (char *)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 (int argc, char *argv[])
       
    84 {
       
    85   int major, minor, micro;
       
    86   char *tmp_version;
       
    87 
       
    88   /* This hangs on some systems (?)
       
    89   system ("touch conf.sdltest");
       
    90   */
       
    91   { FILE *fp = fopen("conf.sdltest", "a"); if ( fp ) fclose(fp); }
       
    92 
       
    93   /* HP/UX 9 (%@#!) writes to sscanf strings */
       
    94   tmp_version = my_strdup("$min_sdl_version");
       
    95   if (sscanf(tmp_version, "%d.%d.%d", &major, &minor, &micro) != 3) {
       
    96      printf("%s, bad version string\n", "$min_sdl_version");
       
    97      exit(1);
       
    98    }
       
    99 
       
   100    if (($sdl_major_version > major) ||
       
   101       (($sdl_major_version == major) && ($sdl_minor_version > minor)) ||
       
   102       (($sdl_major_version == major) && ($sdl_minor_version == minor) && ($sdl_micro_version >= micro)))
       
   103     {
       
   104       return 0;
       
   105     }
       
   106   else
       
   107     {
       
   108       printf("\n*** 'sdl-config --version' returned %d.%d.%d, but the minimum version\n", $sdl_major_version, $sdl_minor_version, $sdl_micro_version);
       
   109       printf("*** of SDL required is %d.%d.%d. If sdl-config is correct, then it is\n", major, minor, micro);
       
   110       printf("*** best to upgrade to the required version.\n");
       
   111       printf("*** If sdl-config was wrong, set the environment variable SDL_CONFIG\n");
       
   112       printf("*** to point to the correct copy of sdl-config, and remove the file\n");
       
   113       printf("*** config.cache before re-running configure\n");
       
   114       return 1;
       
   115     }
       
   116 }
       
   117 
       
   118 ],, no_sdl=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])
       
   119        CFLAGS="$ac_save_CFLAGS"
       
   120        LIBS="$ac_save_LIBS"
       
   121      fi
       
   122   fi
       
   123   if test "x$no_sdl" = x ; then
       
   124      AC_MSG_RESULT(yes)
       
   125      ifelse([$2], , :, [$2])     
       
   126   else
       
   127      AC_MSG_RESULT(no)
       
   128      if test "$SDL_CONFIG" = "no" ; then
       
   129        echo "*** The sdl-config script installed by SDL could not be found"
       
   130        echo "*** If SDL was installed in PREFIX, make sure PREFIX/bin is in"
       
   131        echo "*** your path, or set the SDL_CONFIG environment variable to the"
       
   132        echo "*** full path to sdl-config."
       
   133      else
       
   134        if test -f conf.sdltest ; then
       
   135         :
       
   136        else
       
   137           echo "*** Could not run SDL test program, checking why..."
       
   138           CFLAGS="$CFLAGS $SDL_CFLAGS"
       
   139           LIBS="$LIBS $SDL_LIBS"
       
   140           AC_TRY_LINK([
       
   141 #include <stdio.h>
       
   142 #include "SDL.h"
       
   143 ],      [ return 0; ],
       
   144         [ echo "*** The test program compiled, but did not run. This usually means"
       
   145           echo "*** that the run-time linker is not finding SDL or finding the wrong"
       
   146           echo "*** version of SDL. If it is not finding SDL, you'll need to set your"
       
   147           echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point"
       
   148           echo "*** to the installed location  Also, make sure you have run ldconfig if that"
       
   149           echo "*** is required on your system"
       
   150 	  echo "***"
       
   151           echo "*** If you have an old version installed, it is best to remove it, although"
       
   152           echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH"],
       
   153         [ echo "*** The test program failed to compile or link. See the file config.log for the"
       
   154           echo "*** exact error that occured. This usually means SDL was incorrectly installed"
       
   155           echo "*** or that you have moved SDL since it was installed. In the latter case, you"
       
   156           echo "*** may want to edit the sdl-config script: $SDL_CONFIG" ])
       
   157           CFLAGS="$ac_save_CFLAGS"
       
   158           LIBS="$ac_save_LIBS"
       
   159        fi
       
   160      fi
       
   161      SDL_CFLAGS=""
       
   162      SDL_LIBS=""
       
   163      ifelse([$3], , :, [$3])
       
   164   fi
       
   165   AC_SUBST(SDL_CFLAGS)
       
   166   AC_SUBST(SDL_LIBS)
       
   167   rm -f conf.sdltest
       
   168 ])