Only support SDL 1.2.x

Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@3245

configure.in

@@ -36,6 +36,16 @@ AM_PATH_SDL($SDL_VERSION,
 LIBS="$LIBS $SDL_LIBS"
 CPPFLAGS="$CPPFLAGS $SDL_CFLAGS"
 
+dnl Check if SDL is 1.2.x (1.3 not supported)
+AC_MSG_CHECKING([SDL version only being 1.2.X])
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include "SDL.h"]],[[
+#if SDL_MINOR_VERSION != 2
+#error "Only SDL 1.2 supported
+#endif
+]])],AC_MSG_RESULT([yes]),[
+ AC_MSG_RESULT([no]) 
+ AC_MSG_ERROR([Only libSDL 1.2.X supported])])
+
 dnl Checks for header files.
 
 dnl Checks for typedefs, structures, and compiler characteristics.