+
+MAYBE_GUI=
+AC_ARG_WITH([gtk], AS_HELP_STRING([--with-gtk], [enable GTK+ gui]))
+if test "x$with_gtk" = "xyes"; then
+ PKG_CHECK_MODULES([GTK], [gtk+-3.0])
+ PKG_CHECK_MODULES([GLIB], [glib-2.0 > 2.32.0])
+ MAYBE_GUI=gui
+ AC_CONFIG_FILES([gui/Makefile])
+fi
+AC_SUBST([MAYBE_GUI])
+