add check to configure script to detect old versions of Xrandr

configure.in

@@ -494,6 +494,22 @@ AC_ARG_ENABLE(
 		LIBS="$LIBS -lXrandr")
 )
 
+AC_MSG_CHECKING([whether to have RANDR 1.2 support])
+AC_ARG_ENABLE(
+  randr1.2,
+[  --enable-randr1.2       RANDR 1.2 support ([default=yes])],
+  if test x$enableval = "xyes"; then
+	AC_MSG_RESULT([yes])
+	AC_CHECK_LIB(Xrandr, XRRUpdateConfiguration,
+		AC_DEFINE(HAVE_RANDR1_2, 1, "randr 1.2 support"))
+  else
+    AC_MSG_RESULT([no])
+  fi,  
+  AC_MSG_RESULT([yes])
+  AC_CHECK_LIB(Xrandr, XRRUpdateConfiguration,
+		AC_DEFINE(HAVE_RANDR1_2, 1, "randr 1.2 support"))
+)
+
 dnl Check for Xinerama support
 
 AC_MSG_CHECKING([whether to build support for the Xinerama extension])

src/fluxbox.cc

@@ -865,7 +865,9 @@ void Fluxbox::handleEvent(XEvent * const e) {
 
 #ifdef HAVE_RANDR
         if (e->type == m_randr_event_type) {
+#ifdef HAVE_RANDR1_2
             XRRUpdateConfiguration(e);
+#endif
             // update root window size in screen
             BScreen *scr = searchScreen(e->xany.window);
             if (scr != 0)