sdl.m4
author Sam Lantinga <slouken@lokigames.com>
Thu, 26 Apr 2001 16:45:43 +0000
changeset 0 74212992fb08
child 1 cf2af46e9e2a
permissions -rw-r--r--
Initial revision
     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 ])