Updated the generic event check to try to compile instead of just look for library runtime function (fixes compiling on older Mac OS X SDKs)

configure

@@ -22226,43 +22226,41 @@ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
             { echo "$as_me:$LINENO: result: $have_const_param_XextAddDisplay" >&5
 echo "${ECHO_T}$have_const_param_XextAddDisplay" >&6; }
 
-            { echo "$as_me:$LINENO: checking for XGetEventData in -lX11" >&5
+                        { echo "$as_me:$LINENO: checking for XGenericEvent" >&5
-echo $ECHO_N "checking for XGetEventData in -lX11... $ECHO_C" >&6; }
+echo $ECHO_N "checking for XGenericEvent... $ECHO_C" >&6; }
-if test "${ac_cv_lib_X11_XGetEventData+set}" = set; then
+            have_XGenericEvent=no
-  echo $ECHO_N "(cached) $ECHO_C" >&6
+            cat >conftest.$ac_ext <<_ACEOF
-else
-  ac_check_lib_save_LIBS=$LIBS
-LIBS="-lX11  $LIBS"
-cat >conftest.$ac_ext <<_ACEOF
 /* confdefs.h.  */
 _ACEOF
 cat confdefs.h >>conftest.$ac_ext
 cat >>conftest.$ac_ext <<_ACEOF
 /* end confdefs.h.  */
 
-/* Override any GCC internal prototype to avoid an error.
+              	#include <X11/Xlib.h>
-   Use char because int might match the return type of a GCC
+
-   builtin and then its argument prototype would still apply.  */
-#ifdef __cplusplus
-extern "C"
-#endif
-char XGetEventData ();
 int
 main ()
 {
-return XGetEventData ();
+
+Display *display;
+XEvent event;
+XGenericEventCookie *cookie = &event.xcookie;
+XNextEvent(display, &event);
+XGetEventData(display, cookie);
+XFreeEventData(display, cookie);
+
   ;
   return 0;
 }
 _ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
+rm -f conftest.$ac_objext
-if { (ac_try="$ac_link"
+if { (ac_try="$ac_compile"
 case "(($ac_try" in
   *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
   *) ac_try_echo=$ac_try;;
 esac
 eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
-  (eval "$ac_link") 2>conftest.er1
+  (eval "$ac_compile") 2>conftest.er1
   ac_status=$?
   grep -v '^ *+' conftest.er1 >conftest.err
   rm -f conftest.er1
@@ -22271,30 +22269,25 @@ eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
   (exit $ac_status); } && {
 	 test -z "$ac_c_werror_flag" ||
 	 test ! -s conftest.err
-       } && test -s conftest$ac_exeext &&
+       } && test -s conftest.$ac_objext; then
-       $as_test_x conftest$ac_exeext; then
+
-  ac_cv_lib_X11_XGetEventData=yes
+                have_XGenericEvent=yes
+                cat >>confdefs.h <<\_ACEOF
+#define SDL_VIDEO_DRIVER_X11_SUPPORTS_GENERIC_EVENTS 1
+_ACEOF
+
+
 else
   echo "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
 
-	ac_cv_lib_X11_XGetEventData=no
-fi
-
-rm -f core conftest.err conftest.$ac_objext conftest_ipa8_conftest.oo \
-      conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
-fi
-{ echo "$as_me:$LINENO: result: $ac_cv_lib_X11_XGetEventData" >&5
-echo "${ECHO_T}$ac_cv_lib_X11_XGetEventData" >&6; }
-if test $ac_cv_lib_X11_XGetEventData = yes; then
-
-cat >>confdefs.h <<\_ACEOF
-#define SDL_VIDEO_DRIVER_X11_SUPPORTS_GENERIC_EVENTS 1
-_ACEOF
 
 fi
 
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+            { echo "$as_me:$LINENO: result: $have_XGenericEvent" >&5
+echo "${ECHO_T}$have_XGenericEvent" >&6; }
+
             { echo "$as_me:$LINENO: checking for XkbKeycodeToKeysym in -lX11" >&5
 echo $ECHO_N "checking for XkbKeycodeToKeysym in -lX11... $ECHO_C" >&6; }
 if test "${ac_cv_lib_X11_XkbKeycodeToKeysym+set}" = set; then
@@ -22831,6 +22824,7 @@ cat >>conftest.$ac_ext <<_ACEOF
 int
 main ()
 {
+
 int event_type = XI_TouchBegin;
 XITouchClassInfo *t;
 Status
@@ -29773,7 +29767,7 @@ do
     cat >>$CONFIG_STATUS <<_ACEOF
     # First, check the format of the line:
     cat >"\$tmp/defines.sed" <<\\CEOF
-/^[	 ]*#[	 ]*undef[	 ][	 ]*$ac_word_re[	 ]*/b def
+/^[	 ]*#[	 ]*undef[	 ][	 ]*$ac_word_re[	 ]*\$/b def
 /^[	 ]*#[	 ]*define[	 ][	 ]*$ac_word_re[(	 ]/b def
 b
 :def

configure.in

@@ -1106,7 +1106,24 @@ AC_HELP_STRING([--enable-x11-shared], [dynamically load X11 support [[default=ma
             ])
             AC_MSG_RESULT($have_const_param_XextAddDisplay)
 
-            AC_CHECK_LIB(X11, XGetEventData, AC_DEFINE(SDL_VIDEO_DRIVER_X11_SUPPORTS_GENERIC_EVENTS, 1, [Have XGenericEvent]))
+            dnl AC_CHECK_LIB(X11, XGetEventData, AC_DEFINE(SDL_VIDEO_DRIVER_X11_SUPPORTS_GENERIC_EVENTS, 1, [Have XGenericEvent]))
+            AC_MSG_CHECKING([for XGenericEvent])
+            have_XGenericEvent=no
+            AC_TRY_COMPILE([
+              	#include <X11/Xlib.h>
+            ],[
+Display *display;
+XEvent event;
+XGenericEventCookie *cookie = &event.xcookie;
+XNextEvent(display, &event);
+XGetEventData(display, cookie);
+XFreeEventData(display, cookie);
+            ],[
+                have_XGenericEvent=yes
+                AC_DEFINE(SDL_VIDEO_DRIVER_X11_SUPPORTS_GENERIC_EVENTS)
+            ])
+            AC_MSG_RESULT($have_XGenericEvent)
+
             AC_CHECK_LIB(X11, XkbKeycodeToKeysym, AC_DEFINE(SDL_VIDEO_DRIVER_X11_HAS_XKBKEYCODETOKEYSYM, 1, [Have XkbKeycodeToKeysym]))
 
             AC_ARG_ENABLE(video-x11-xcursor,