+# Check for GTK 2.0
+PKG_CHECK_MODULES(GLIB20, [ gtk+-2.0 >= 2.4.0 ])
+AC_SUBST(GTK20_CFLAGS)
+AC_SUBST(GTK20_LIBS)
+
+# Check for GLADE 2.0
+PKG_CHECK_MODULES(GLADE20, [ libglade-2.0 >= 2.4.0 ])
+AC_SUBST(GLADE20_CFLAGS)
+AC_SUBST(GLADE20_LIBS)
+
+# Check for DBUS
+PKG_CHECK_MODULES(DBUS, [ dbus-1 >= 0.23, dbus-glib-1 >= 0.23 ])
+AC_SUBST(DBUS_CFLAGS)
+AC_SUBST(DBUS_LIBS)
+