1# stuff for SDL, hope this helps if we put it here
2
3# Configure paths for SDL
4# Sam Lantinga 9/21/99
5# stolen from Manish Singh
6# stolen back from Frank Belew
7# stolen from Manish Singh
8# Shamelessly stolen from Owen Taylor
9
10dnl AM_PATH_SDL([MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]])
11dnl Test for SDL, and define SDL_CFLAGS and SDL_LIBS
12dnl
13AC_DEFUN([AM_PATH_SDL],
14[dnl
15dnl Get the cflags and libraries from the sdl-config script
16dnl
17AC_ARG_WITH(sdl-prefix,
18  AC_HELP_STRING([--with-sdl-prefix=PFX],
19                 [prefix where SDL is installed (optional)]),
20  sdl_prefix="$withval", sdl_prefix="")
21
22AC_ARG_WITH(sdl-exec-prefix,
23  AC_HELP_STRING([--with-sdl-exec-prefix=PFX],
24                 [exec prefix where SDL is installed (optional)]),
25  sdl_exec_prefix="$withval", sdl_exec_prefix="")
26
27AC_ARG_ENABLE(sdltest,
28  AC_HELP_STRING([--disable-sdltest],
29                 [do not try to compile and run a test SDL program]),
30  , enable_sdltest=yes)
31
32  if test x$sdl_exec_prefix != x ; then
33     sdl_args="$sdl_args --exec-prefix=$sdl_exec_prefix"
34     if test x${SDL_CONFIG+set} != xset ; then
35        SDL_CONFIG=$sdl_exec_prefix/bin/sdl-config
36     fi
37  fi
38  if test x$sdl_prefix != x ; then
39     sdl_args="$sdl_args --prefix=$sdl_prefix"
40     if test x${SDL_CONFIG+set} != xset ; then
41        SDL_CONFIG=$sdl_prefix/bin/sdl-config
42     fi
43  fi
44
45  AC_PATH_PROG(SDL_CONFIG, sdl-config, no)
46  min_sdl_version=ifelse([$1], ,0.11.0,$1)
47  AC_MSG_CHECKING(for SDL - version >= $min_sdl_version)
48  no_sdl=""
49  if test "$SDL_CONFIG" = "no" ; then
50    no_sdl=yes
51  else
52    SDL_CFLAGS=`$SDL_CONFIG $sdlconf_args --cflags`
53    SDL_LIBS=`$SDL_CONFIG $sdlconf_args --libs`
54    SDL_STATIC_LIBS=`$SDL_CONFIG $sdlconf_args --static-libs`
55
56
57    sdl_major_version=`$SDL_CONFIG $sdl_args --version | \
58           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
59    sdl_minor_version=`$SDL_CONFIG $sdl_args --version | \
60           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
61    sdl_micro_version=`$SDL_CONFIG $sdl_config_args --version | \
62           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
63    if test "x$enable_sdltest" = "xyes" ; then
64      ac_save_CFLAGS="$CFLAGS"
65      ac_save_LIBS="$LIBS"
66      CFLAGS="$CFLAGS $SDL_CFLAGS"
67      LIBS="$LIBS $SDL_STATIC_LIBS"
68dnl
69dnl Now check if the installed SDL is sufficiently new. (Also sanity
70dnl checks the results of sdl-config to some extent
71dnl
72      rm -f conf.sdltest
73      AC_TRY_RUN([
74#include <stdio.h>
75#include <stdlib.h>
76#include <string.h>
77#include "SDL.h"
78
79char*
80my_strdup (char *str)
81{
82  char *new_str;
83
84  if (str)
85    {
86      new_str = (char *)malloc ((strlen (str) + 1) * sizeof(char));
87      strcpy (new_str, str);
88    }
89  else
90    new_str = NULL;
91
92  return new_str;
93}
94
95int main (int argc, char *argv[])
96{
97  int major, minor, micro;
98  char *tmp_version;
99
100  /* This hangs on some systems (?)
101  system ("touch conf.sdltest");
102  */
103  { FILE *fp = fopen("conf.sdltest", "a"); if ( fp ) fclose(fp); }
104
105  /* HP/UX 9 (%@#!) writes to sscanf strings */
106  tmp_version = my_strdup("$min_sdl_version");
107  if (sscanf(tmp_version, "%d.%d.%d", &major, &minor, &micro) != 3) {
108     printf("%s, bad version string\n", "$min_sdl_version");
109     exit(1);
110   }
111
112   if (($sdl_major_version > major) ||
113      (($sdl_major_version == major) && ($sdl_minor_version > minor)) ||
114      (($sdl_major_version == major) && ($sdl_minor_version == minor) && ($sdl_micro_version >= micro)))
115    {
116      return 0;
117    }
118  else
119    {
120      printf("\n*** 'sdl-config --version' returned %d.%d.%d, but the minimum version\n", $sdl_major_version, $sdl_minor_version, $sdl_micro_version);
121      printf("*** of SDL required is %d.%d.%d. If sdl-config is correct, then it is\n", major, minor, micro);
122      printf("*** best to upgrade to the required version.\n");
123      printf("*** If sdl-config was wrong, set the environment variable SDL_CONFIG\n");
124      printf("*** to point to the correct copy of sdl-config, and remove the file\n");
125      printf("*** config.cache before re-running configure\n");
126      return 1;
127    }
128}
129
130],, no_sdl=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])
131       CFLAGS="$ac_save_CFLAGS"
132       LIBS="$ac_save_LIBS"
133     fi
134  fi
135  if test "x$no_sdl" = x ; then
136     AC_MSG_RESULT(yes)
137     ifelse([$2], , :, [$2])
138  else
139     AC_MSG_RESULT(no)
140     if test "$SDL_CONFIG" = "no" ; then
141       echo "*** The sdl-config script installed by SDL could not be found"
142       echo "*** If SDL was installed in PREFIX, make sure PREFIX/bin is in"
143       echo "*** your path, or set the SDL_CONFIG environment variable to the"
144       echo "*** full path to sdl-config."
145     else
146       if test -f conf.sdltest ; then
147        :
148       else
149          echo "*** Could not run SDL test program, checking why..."
150          CFLAGS="$CFLAGS $SDL_CFLAGS"
151          LIBS="$LIBS $SDL_LIBS"
152          AC_TRY_LINK([
153#include <stdio.h>
154#include "SDL.h"
155
156int main(int argc, char *argv[])
157{ return 0; }
158#undef  main
159#define main K_and_R_C_main
160],      [ return 0; ],
161        [ echo "*** The test program compiled, but did not run. This usually means"
162          echo "*** that the run-time linker is not finding SDL or finding the wrong"
163          echo "*** version of SDL. If it is not finding SDL, you'll need to set your"
164          echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point"
165          echo "*** to the installed location  Also, make sure you have run ldconfig if that"
166          echo "*** is required on your system"
167	  echo "***"
168          echo "*** If you have an old version installed, it is best to remove it, although"
169          echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH"],
170        [ echo "*** The test program failed to compile or link. See the file config.log for the"
171          echo "*** exact error that occured. This usually means SDL was incorrectly installed"
172          echo "*** or that you have moved SDL since it was installed. In the latter case, you"
173          echo "*** may want to edit the sdl-config script: $SDL_CONFIG" ])
174          CFLAGS="$ac_save_CFLAGS"
175          LIBS="$ac_save_LIBS"
176       fi
177     fi
178     SDL_CFLAGS=""
179     SDL_LIBS=""
180     ifelse([$3], , :, [$3])
181  fi
182  AC_SUBST(SDL_CFLAGS)
183  AC_SUBST(SDL_LIBS)
184  rm -f conf.sdltest
185])
186
187