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
8dnl AM_PATH_SDL([MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]])
9dnl Test for SDL, and define SDL_CFLAGS and SDL_LIBS
10dnl
11AC_DEFUN(AM_PATH_SDL,
12[dnl
13dnl Get the cflags and libraries from the sdl-config script
14dnl
15AC_ARG_WITH(sdl-prefix,[  --with-sdl-prefix=PFX   Prefix where SDL is installed (optional)],
16            sdl_prefix="$withval", sdl_prefix="")
17AC_ARG_WITH(sdl-exec-prefix,[  --with-sdl-exec-prefix=PFX Exec prefix where SDL is installed (optional)],
18            sdl_exec_prefix="$withval", sdl_exec_prefix="")
19AC_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_PATH_PROG(SDL_CONFIG, sdl-config, no)
36  min_sdl_version=ifelse([$1], ,0.11.0,$1)
37  AC_MSG_CHECKING(for SDL - version >= $min_sdl_version)
38  no_sdl=""
39  if test "$SDL_CONFIG" = "no" ; then
40    no_sdl=yes
41  else
42    SDL_CFLAGS=`$SDL_CONFIG $sdlconf_args --cflags`
43    SDL_LIBS=`$SDL_CONFIG $sdlconf_args --libs`
44    SDL_LIBS="$SDL_LIBS -lSDL_ttf"
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 $SDL_LIBS"
57dnl
58dnl Now check if the installed SDL is sufficiently new. (Also sanity
59dnl checks the results of sdl-config to some extent
60dnl
61      rm -f conf.sdltest
62      AC_TRY_RUN([
63#include <stdio.h>
64#include <stdlib.h>
65#include <string.h>
66#include <SDL/SDL.h>
67
68char*
69my_strdup (char *str)
70{
71  char *new_str;
72
73  if (str)
74    {
75      new_str = malloc ((strlen (str) + 1) * sizeof(char));
76      strcpy (new_str, str);
77    }
78  else
79    new_str = NULL;
80
81  return new_str;
82}
83
84int main (int argc, char *argv[])
85{
86  int major, minor, micro;
87  char *tmp_version;
88
89  /* This hangs on some systems (?)
90  system ("touch conf.sdltest");
91  */
92  { FILE *fp = fopen("conf.sdltest", "a"); if ( fp ) fclose(fp); }
93
94  /* HP/UX 9 (%@#!) writes to sscanf strings */
95  tmp_version = my_strdup("$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/SDL.h>
144],      [ return 0; ],
145        [ echo "*** The test program compiled, but did not run. This usually means"
146          echo "*** that the run-time linker is not finding SDL or finding the wrong"
147          echo "*** version of SDL. If it is not finding SDL, you'll need to set your"
148          echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point"
149          echo "*** to the installed location  Also, make sure you have run ldconfig if that"
150          echo "*** is required on your system"
151	  echo "***"
152          echo "*** If you have an old version installed, it is best to remove it, although"
153          echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH"],
154        [ echo "*** The test program failed to compile or link. See the file config.log for the"
155          echo "*** exact error that occured. This usually means SDL was incorrectly installed"
156          echo "*** or that you have moved SDL since it was installed. In the latter case, you"
157          echo "*** may want to edit the sdl-config script: $SDL_CONFIG"
158	  echo "*** Remember that you need both SDL_ttf and SDL. Try http://www.libsdl.org" ])
159          CFLAGS="$ac_save_CFLAGS"
160          LIBS="$ac_save_LIBS"
161       fi
162     fi
163     SDL_CFLAGS=""
164     SDL_LIBS=""
165     ifelse([$3], , :, [$3])
166  fi
167  AC_SUBST(SDL_CFLAGS)
168  AC_SUBST(SDL_LIBS)
169  rm -f conf.sdltest
170])
171