build/aclocal/sdl.m4

   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_CXXFLAGS="$CXXFLAGS"
  56       ac_save_LIBS="$LIBS"
  57       CFLAGS="$CFLAGS $SDL_CFLAGS"
  58       CXXFLAGS="$CXXFLAGS $SDL_CFLAGS"
  59       LIBS="$LIBS $SDL_LIBS"
  60 dnl
  61 dnl Now check if the installed SDL is sufficiently new. (Also sanity
  62 dnl checks the results of sdl-config to some extent
  63 dnl
  64       rm -f conf.sdltest
  65       AC_TRY_RUN([
  66 #include <stdio.h>
  67 #include <stdlib.h>
  68 #include <string.h>
  69 #include "SDL.h"
  70
  71 char*
  72 my_strdup (char *str)
  73 {
  74   char *new_str;
  75
  76   if (str)
  77     {
  78       new_str = (char *)malloc ((strlen (str) + 1) * sizeof(char));
  79       strcpy (new_str, str);
  80     }
  81   else
  82     new_str = NULL;
  83
  84   return new_str;
  85 }
  86
  87 int main (int argc, char *argv[])
  88 {
  89   int major, minor, micro;
  90   char *tmp_version;
  91
  92   /* This hangs on some systems (?)
  93   system ("touch conf.sdltest");
  94   */
  95   { FILE *fp = fopen("conf.sdltest", "a"); if ( fp ) fclose(fp); }
  96
  97   /* HP/UX 9 (%@#!) writes to sscanf strings */
  98   tmp_version = my_strdup("$min_sdl_version");
  99   if (sscanf(tmp_version, "%d.%d.%d", &major, &minor, &micro) != 3) {
 100      printf("%s, bad version string\n", "$min_sdl_version");
 101      exit(1);
 102    }
 103
 104    if (($sdl_major_version > major) ||
 105       (($sdl_major_version == major) && ($sdl_minor_version > minor)) ||
 106       (($sdl_major_version == major) && ($sdl_minor_version == minor) && ($sdl_micro_version >= micro)))
 107     {
 108       return 0;
 109     }
 110   else
 111     {
 112       printf("\n*** 'sdl-config --version' returned %d.%d.%d, but the minimum version\n", $sdl_major_version, $sdl_minor_version, $sdl_micro_version);
 113       printf("*** of SDL required is %d.%d.%d. If sdl-config is correct, then it is\n", major, minor, micro);
 114       printf("*** best to upgrade to the required version.\n");
 115       printf("*** If sdl-config was wrong, set the environment variable SDL_CONFIG\n");
 116       printf("*** to point to the correct copy of sdl-config, and remove the file\n");
 117       printf("*** config.cache before re-running configure\n");
 118       return 1;
 119     }
 120 }
 121
 122 ],, no_sdl=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])
 123        CFLAGS="$ac_save_CFLAGS"
 124        CXXFLAGS="$ac_save_CXXFLAGS"
 125        LIBS="$ac_save_LIBS"
 126      fi
 127   fi
 128   if test "x$no_sdl" = x ; then
 129      AC_MSG_RESULT(yes)
 130      ifelse([$2], , :, [$2])
 131   else
 132      AC_MSG_RESULT(no)
 133      if test "$SDL_CONFIG" = "no" ; then
 134        echo "*** The sdl-config script installed by SDL could not be found"
 135        echo "*** If SDL was installed in PREFIX, make sure PREFIX/bin is in"
 136        echo "*** your path, or set the SDL_CONFIG environment variable to the"
 137        echo "*** full path to sdl-config."
 138      else
 139        if test -f conf.sdltest ; then
 140         :
 141        else
 142           echo "*** Could not run SDL test program, checking why..."
 143           CFLAGS="$CFLAGS $SDL_CFLAGS"
 144           CXXFLAGS="$CXXFLAGS $SDL_CFLAGS"
 145           LIBS="$LIBS $SDL_LIBS"
 146           AC_TRY_LINK([
 147 #include <stdio.h>
 148 #include "SDL.h"
 149
 150 int main(int argc, char *argv[])
 151 { return 0; }
 152 #undef  main
 153 #define main K_and_R_C_main
 154 ],      [ return 0; ],
 155         [ echo "*** The test program compiled, but did not run. This usually means"
 156           echo "*** that the run-time linker is not finding SDL or finding the wrong"
 157           echo "*** version of SDL. If it is not finding SDL, you'll need to set your"
 158           echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point"
 159           echo "*** to the installed location  Also, make sure you have run ldconfig if that"
 160           echo "*** is required on your system"
 161           echo "***"
 162           echo "*** If you have an old version installed, it is best to remove it, although"
 163           echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH"],
 164         [ echo "*** The test program failed to compile or link. See the file config.log for the"
 165           echo "*** exact error that occured. This usually means SDL was incorrectly installed"
 166           echo "*** or that you have moved SDL since it was installed. In the latter case, you"
 167           echo "*** may want to edit the sdl-config script: $SDL_CONFIG" ])
 168           CFLAGS="$ac_save_CFLAGS"
 169           CXXFLAGS="$ac_save_CXXFLAGS"
 170           LIBS="$ac_save_LIBS"
 171        fi
 172      fi
 173      SDL_CFLAGS=""
 174      SDL_LIBS=""
 175      ifelse([$3], , :, [$3])
 176   fi
 177   AC_SUBST(SDL_CFLAGS)
 178   AC_SUBST(SDL_LIBS)
 179   rm -f conf.sdltest
 180 ])