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   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 occurred. 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 ])