sdl.m4
author Sam Lantinga <slouken@libsdl.org>
Mon, 11 Mar 2002 17:38:56 +0000
changeset 309 2de77f7b7a28
parent 224 e7f75aaf542f
child 452 4c5c10383201
permissions -rw-r--r--
*** empty log message ***
     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_REQUIRE([AC_CANONICAL_TARGET])
    36   AC_PATH_PROG(SDL_CONFIG, sdl-config, no)
    37   min_sdl_version=ifelse([$1], ,0.11.0,$1)
    38   AC_MSG_CHECKING(for SDL - version >= $min_sdl_version)
    39   no_sdl=""
    40   if test "$SDL_CONFIG" = "no" ; then
    41     no_sdl=yes
    42   else
    43     SDL_CFLAGS=`$SDL_CONFIG $sdlconf_args --cflags`
    44     SDL_LIBS=`$SDL_CONFIG $sdlconf_args --libs`
    45 
    46     sdl_major_version=`$SDL_CONFIG $sdl_args --version | \
    47            sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
    48     sdl_minor_version=`$SDL_CONFIG $sdl_args --version | \
    49            sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
    50     sdl_micro_version=`$SDL_CONFIG $sdl_config_args --version | \
    51            sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
    52     if test "x$enable_sdltest" = "xyes" ; then
    53       ac_save_CFLAGS="$CFLAGS"
    54       ac_save_LIBS="$LIBS"
    55       CFLAGS="$CFLAGS $SDL_CFLAGS"
    56       LIBS="$LIBS $SDL_LIBS"
    57 dnl
    58 dnl Now check if the installed SDL is sufficiently new. (Also sanity
    59 dnl checks the results of sdl-config to some extent
    60 dnl
    61       rm -f conf.sdltest
    62       AC_TRY_RUN([
    63 #include <stdio.h>
    64 #include <stdlib.h>
    65 #include <string.h>
    66 #include "SDL.h"
    67 
    68 char*
    69 my_strdup (char *str)
    70 {
    71   char *new_str;
    72   
    73   if (str)
    74     {
    75       new_str = (char *)malloc ((strlen (str) + 1) * sizeof(char));
    76       strcpy (new_str, str);
    77     }
    78   else
    79     new_str = NULL;
    80   
    81   return new_str;
    82 }
    83 
    84 int main (int argc, char *argv[])
    85 {
    86   int major, minor, micro;
    87   char *tmp_version;
    88 
    89   /* This hangs on some systems (?)
    90   system ("touch conf.sdltest");
    91   */
    92   { FILE *fp = fopen("conf.sdltest", "a"); if ( fp ) fclose(fp); }
    93 
    94   /* HP/UX 9 (%@#!) writes to sscanf strings */
    95   tmp_version = my_strdup("$min_sdl_version");
    96   if (sscanf(tmp_version, "%d.%d.%d", &major, &minor, &micro) != 3) {
    97      printf("%s, bad version string\n", "$min_sdl_version");
    98      exit(1);
    99    }
   100 
   101    if (($sdl_major_version > major) ||
   102       (($sdl_major_version == major) && ($sdl_minor_version > minor)) ||
   103       (($sdl_major_version == major) && ($sdl_minor_version == minor) && ($sdl_micro_version >= micro)))
   104     {
   105       return 0;
   106     }
   107   else
   108     {
   109       printf("\n*** 'sdl-config --version' returned %d.%d.%d, but the minimum version\n", $sdl_major_version, $sdl_minor_version, $sdl_micro_version);
   110       printf("*** of SDL required is %d.%d.%d. If sdl-config is correct, then it is\n", major, minor, micro);
   111       printf("*** best to upgrade to the required version.\n");
   112       printf("*** If sdl-config was wrong, set the environment variable SDL_CONFIG\n");
   113       printf("*** to point to the correct copy of sdl-config, and remove the file\n");
   114       printf("*** config.cache before re-running configure\n");
   115       return 1;
   116     }
   117 }
   118 
   119 ],, no_sdl=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])
   120        CFLAGS="$ac_save_CFLAGS"
   121        LIBS="$ac_save_LIBS"
   122      fi
   123   fi
   124   if test "x$no_sdl" = x ; then
   125      AC_MSG_RESULT(yes)
   126      ifelse([$2], , :, [$2])     
   127   else
   128      AC_MSG_RESULT(no)
   129      if test "$SDL_CONFIG" = "no" ; then
   130        echo "*** The sdl-config script installed by SDL could not be found"
   131        echo "*** If SDL was installed in PREFIX, make sure PREFIX/bin is in"
   132        echo "*** your path, or set the SDL_CONFIG environment variable to the"
   133        echo "*** full path to sdl-config."
   134      else
   135        if test -f conf.sdltest ; then
   136         :
   137        else
   138           echo "*** Could not run SDL test program, checking why..."
   139           CFLAGS="$CFLAGS $SDL_CFLAGS"
   140           LIBS="$LIBS $SDL_LIBS"
   141           AC_TRY_LINK([
   142 #include <stdio.h>
   143 #include "SDL.h"
   144 
   145 int main(int argc, char *argv[])
   146 { return 0; }
   147 #undef  main
   148 #define main K_and_R_C_main
   149 ],      [ return 0; ],
   150         [ echo "*** The test program compiled, but did not run. This usually means"
   151           echo "*** that the run-time linker is not finding SDL or finding the wrong"
   152           echo "*** version of SDL. If it is not finding SDL, you'll need to set your"
   153           echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point"
   154           echo "*** to the installed location  Also, make sure you have run ldconfig if that"
   155           echo "*** is required on your system"
   156 	  echo "***"
   157           echo "*** If you have an old version installed, it is best to remove it, although"
   158           echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH"],
   159         [ echo "*** The test program failed to compile or link. See the file config.log for the"
   160           echo "*** exact error that occured. This usually means SDL was incorrectly installed"
   161           echo "*** or that you have moved SDL since it was installed. In the latter case, you"
   162           echo "*** may want to edit the sdl-config script: $SDL_CONFIG" ])
   163           CFLAGS="$ac_save_CFLAGS"
   164           LIBS="$ac_save_LIBS"
   165        fi
   166      fi
   167      SDL_CFLAGS=""
   168      SDL_LIBS=""
   169      ifelse([$3], , :, [$3])
   170   fi
   171   AC_SUBST(SDL_CFLAGS)
   172   AC_SUBST(SDL_LIBS)
   173   rm -f conf.sdltest
   174 ])