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   if test "x$prefix" != xNONE; then

    36     PATH="$prefix/bin:$prefix/usr/bin:$PATH"

    37   fi

    38   AC_PATH_PROG(SDL_CONFIG, sdl-config, no, [$PATH])

    39   min_sdl_version=ifelse([$1], ,0.11.0,$1)

    40   AC_MSG_CHECKING(for SDL - version >= $min_sdl_version)

    41   no_sdl=""

    42   if test "$SDL_CONFIG" = "no" ; then

    43     no_sdl=yes

    44   else

    45     SDL_CFLAGS=`$SDL_CONFIG $sdlconf_args --cflags`

    46     SDL_LIBS=`$SDL_CONFIG $sdlconf_args --libs`

    47 

    48     sdl_major_version=`$SDL_CONFIG $sdl_args --version | \

    49            sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`

    50     sdl_minor_version=`$SDL_CONFIG $sdl_args --version | \

    51            sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`

    52     sdl_micro_version=`$SDL_CONFIG $sdl_config_args --version | \

    53            sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`

    54     if test "x$enable_sdltest" = "xyes" ; then

    55       ac_save_CFLAGS="$CFLAGS"

    56       ac_save_CXXFLAGS="$CXXFLAGS"

    57       ac_save_LIBS="$LIBS"

    58       CFLAGS="$CFLAGS $SDL_CFLAGS"

    59       CXXFLAGS="$CXXFLAGS $SDL_CFLAGS"

    60       LIBS="$LIBS $SDL_LIBS"

    61 dnl

    62 dnl Now check if the installed SDL is sufficiently new. (Also sanity

    63 dnl checks the results of sdl-config to some extent

    64 dnl

    65       rm -f conf.sdltest

    66       AC_TRY_RUN([

    67 #include <stdio.h>

    68 #include <stdlib.h>

    69 #include <string.h>

    70 #include "SDL.h"

    71 

    72 char*

    73 my_strdup (char *str)

    74 {

    75   char *new_str;

    76   

    77   if (str)

    78     {

    79       new_str = (char *)malloc ((strlen (str) + 1) * sizeof(char));

    80       strcpy (new_str, str);

    81     }

    82   else

    83     new_str = NULL;

    84   

    85   return new_str;

    86 }

    87 

    88 int main (int argc, char *argv[])

    89 {

    90   int major, minor, micro;

    91   char *tmp_version;

    92 

    93   /* This hangs on some systems (?)

    94   system ("touch conf.sdltest");

    95   */

    96   { FILE *fp = fopen("conf.sdltest", "a"); if ( fp ) fclose(fp); }

    97 

    98   /* HP/UX 9 (%@#!) writes to sscanf strings */

    99   tmp_version = my_strdup("$min_sdl_version");

   100   if (sscanf(tmp_version, "%d.%d.%d", &major, &minor, &micro) != 3) {

   101      printf("%s, bad version string\n", "$min_sdl_version");

   102      exit(1);

   103    }

   104 

   105    if (($sdl_major_version > major) ||

   106       (($sdl_major_version == major) && ($sdl_minor_version > minor)) ||

   107       (($sdl_major_version == major) && ($sdl_minor_version == minor) && ($sdl_micro_version >= micro)))

   108     {

   109       return 0;

   110     }

   111   else

   112     {

   113       printf("\n*** 'sdl-config --version' returned %d.%d.%d, but the minimum version\n", $sdl_major_version, $sdl_minor_version, $sdl_micro_version);

   114       printf("*** of SDL required is %d.%d.%d. If sdl-config is correct, then it is\n", major, minor, micro);

   115       printf("*** best to upgrade to the required version.\n");

   116       printf("*** If sdl-config was wrong, set the environment variable SDL_CONFIG\n");

   117       printf("*** to point to the correct copy of sdl-config, and remove the file\n");

   118       printf("*** config.cache before re-running configure\n");

   119       return 1;

   120     }

   121 }

   122 

   123 ],, no_sdl=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])

   124        CFLAGS="$ac_save_CFLAGS"

   125        CXXFLAGS="$ac_save_CXXFLAGS"

   126        LIBS="$ac_save_LIBS"

   127      fi

   128   fi

   129   if test "x$no_sdl" = x ; then

   130      AC_MSG_RESULT(yes)

   131      ifelse([$2], , :, [$2])     

   132   else

   133      AC_MSG_RESULT(no)

   134      if test "$SDL_CONFIG" = "no" ; then

   135        echo "*** The sdl-config script installed by SDL could not be found"

   136        echo "*** If SDL was installed in PREFIX, make sure PREFIX/bin is in"

   137        echo "*** your path, or set the SDL_CONFIG environment variable to the"

   138        echo "*** full path to sdl-config."

   139      else

   140        if test -f conf.sdltest ; then

   141         :

   142        else

   143           echo "*** Could not run SDL test program, checking why..."

   144           CFLAGS="$CFLAGS $SDL_CFLAGS"

   145           CXXFLAGS="$CXXFLAGS $SDL_CFLAGS"

   146           LIBS="$LIBS $SDL_LIBS"

   147           AC_TRY_LINK([

   148 #include <stdio.h>

   149 #include "SDL.h"

   150 

   151 int main(int argc, char *argv[])

   152 { return 0; }

   153 #undef  main

   154 #define main K_and_R_C_main

   155 ],      [ return 0; ],

   156         [ echo "*** The test program compiled, but did not run. This usually means"

   157           echo "*** that the run-time linker is not finding SDL or finding the wrong"

   158           echo "*** version of SDL. If it is not finding SDL, you'll need to set your"

   159           echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point"

   160           echo "*** to the installed location  Also, make sure you have run ldconfig if that"

   161           echo "*** is required on your system"

   162 	  echo "***"

   163           echo "*** If you have an old version installed, it is best to remove it, although"

   164           echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH"],

   165         [ echo "*** The test program failed to compile or link. See the file config.log for the"

   166           echo "*** exact error that occured. This usually means SDL was incorrectly installed"

   167           echo "*** or that you have moved SDL since it was installed. In the latter case, you"

   168           echo "*** may want to edit the sdl-config script: $SDL_CONFIG" ])

   169           CFLAGS="$ac_save_CFLAGS"

   170           CXXFLAGS="$ac_save_CXXFLAGS"

   171           LIBS="$ac_save_LIBS"

   172        fi

   173      fi

   174      SDL_CFLAGS=""

   175      SDL_LIBS=""

   176      ifelse([$3], , :, [$3])

   177   fi

   178   AC_SUBST(SDL_CFLAGS)

   179   AC_SUBST(SDL_LIBS)

   180   rm -f conf.sdltest

   181 ])