sdl.m4
author Sam Lantinga <slouken@libsdl.org>
Thu, 29 Jan 2004 16:14:09 +0000
changeset 794 a5defa3b93e1
parent 489 d90349051cab
child 1118 65f4b2dd46b7
permissions -rw-r--r--
Updated for the latest version of automake
     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   PATH="$prefix/bin:$prefix/usr/bin:$PATH"
    37   AC_PATH_PROG(SDL_CONFIG, sdl-config, no, [$PATH])
    38   min_sdl_version=ifelse([$1], ,0.11.0,$1)
    39   AC_MSG_CHECKING(for SDL - version >= $min_sdl_version)
    40   no_sdl=""
    41   if test "$SDL_CONFIG" = "no" ; then
    42     no_sdl=yes
    43   else
    44     SDL_CFLAGS=`$SDL_CONFIG $sdlconf_args --cflags`
    45     SDL_LIBS=`$SDL_CONFIG $sdlconf_args --libs`
    46 
    47     sdl_major_version=`$SDL_CONFIG $sdl_args --version | \
    48            sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
    49     sdl_minor_version=`$SDL_CONFIG $sdl_args --version | \
    50            sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
    51     sdl_micro_version=`$SDL_CONFIG $sdl_config_args --version | \
    52            sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
    53     if test "x$enable_sdltest" = "xyes" ; then
    54       ac_save_CFLAGS="$CFLAGS"
    55       ac_save_LIBS="$LIBS"
    56       CFLAGS="$CFLAGS $SDL_CFLAGS"
    57       LIBS="$LIBS $SDL_LIBS"
    58 dnl
    59 dnl Now check if the installed SDL is sufficiently new. (Also sanity
    60 dnl checks the results of sdl-config to some extent
    61 dnl
    62       rm -f conf.sdltest
    63       AC_TRY_RUN([
    64 #include <stdio.h>
    65 #include <stdlib.h>
    66 #include <string.h>
    67 #include "SDL.h"
    68 
    69 char*
    70 my_strdup (char *str)
    71 {
    72   char *new_str;
    73   
    74   if (str)
    75     {
    76       new_str = (char *)malloc ((strlen (str) + 1) * sizeof(char));
    77       strcpy (new_str, str);
    78     }
    79   else
    80     new_str = NULL;
    81   
    82   return new_str;
    83 }
    84 
    85 int main (int argc, char *argv[])
    86 {
    87   int major, minor, micro;
    88   char *tmp_version;
    89 
    90   /* This hangs on some systems (?)
    91   system ("touch conf.sdltest");
    92   */
    93   { FILE *fp = fopen("conf.sdltest", "a"); if ( fp ) fclose(fp); }
    94 
    95   /* HP/UX 9 (%@#!) writes to sscanf strings */
    96   tmp_version = my_strdup("$min_sdl_version");
    97   if (sscanf(tmp_version, "%d.%d.%d", &major, &minor, &micro) != 3) {
    98      printf("%s, bad version string\n", "$min_sdl_version");
    99      exit(1);
   100    }
   101 
   102    if (($sdl_major_version > major) ||
   103       (($sdl_major_version == major) && ($sdl_minor_version > minor)) ||
   104       (($sdl_major_version == major) && ($sdl_minor_version == minor) && ($sdl_micro_version >= micro)))
   105     {
   106       return 0;
   107     }
   108   else
   109     {
   110       printf("\n*** 'sdl-config --version' returned %d.%d.%d, but the minimum version\n", $sdl_major_version, $sdl_minor_version, $sdl_micro_version);
   111       printf("*** of SDL required is %d.%d.%d. If sdl-config is correct, then it is\n", major, minor, micro);
   112       printf("*** best to upgrade to the required version.\n");
   113       printf("*** If sdl-config was wrong, set the environment variable SDL_CONFIG\n");
   114       printf("*** to point to the correct copy of sdl-config, and remove the file\n");
   115       printf("*** config.cache before re-running configure\n");
   116       return 1;
   117     }
   118 }
   119 
   120 ],, no_sdl=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])
   121        CFLAGS="$ac_save_CFLAGS"
   122        LIBS="$ac_save_LIBS"
   123      fi
   124   fi
   125   if test "x$no_sdl" = x ; then
   126      AC_MSG_RESULT(yes)
   127      ifelse([$2], , :, [$2])     
   128   else
   129      AC_MSG_RESULT(no)
   130      if test "$SDL_CONFIG" = "no" ; then
   131        echo "*** The sdl-config script installed by SDL could not be found"
   132        echo "*** If SDL was installed in PREFIX, make sure PREFIX/bin is in"
   133        echo "*** your path, or set the SDL_CONFIG environment variable to the"
   134        echo "*** full path to sdl-config."
   135      else
   136        if test -f conf.sdltest ; then
   137         :
   138        else
   139           echo "*** Could not run SDL test program, checking why..."
   140           CFLAGS="$CFLAGS $SDL_CFLAGS"
   141           LIBS="$LIBS $SDL_LIBS"
   142           AC_TRY_LINK([
   143 #include <stdio.h>
   144 #include "SDL.h"
   145 
   146 int main(int argc, char *argv[])
   147 { return 0; }
   148 #undef  main
   149 #define main K_and_R_C_main
   150 ],      [ return 0; ],
   151         [ echo "*** The test program compiled, but did not run. This usually means"
   152           echo "*** that the run-time linker is not finding SDL or finding the wrong"
   153           echo "*** version of SDL. If it is not finding SDL, you'll need to set your"
   154           echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point"
   155           echo "*** to the installed location  Also, make sure you have run ldconfig if that"
   156           echo "*** is required on your system"
   157 	  echo "***"
   158           echo "*** If you have an old version installed, it is best to remove it, although"
   159           echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH"],
   160         [ echo "*** The test program failed to compile or link. See the file config.log for the"
   161           echo "*** exact error that occured. This usually means SDL was incorrectly installed"
   162           echo "*** or that you have moved SDL since it was installed. In the latter case, you"
   163           echo "*** may want to edit the sdl-config script: $SDL_CONFIG" ])
   164           CFLAGS="$ac_save_CFLAGS"
   165           LIBS="$ac_save_LIBS"
   166        fi
   167      fi
   168      SDL_CFLAGS=""
   169      SDL_LIBS=""
   170      ifelse([$3], , :, [$3])
   171   fi
   172   AC_SUBST(SDL_CFLAGS)
   173   AC_SUBST(SDL_LIBS)
   174   rm -f conf.sdltest
   175 ])