-AC_DEFINE_UNQUOTED(FGIS_CONFIG, "$sysconfdir", [Define this to the location of the global config file])
+dnl ---------------------------------------------------------------------------
+dnl Handle global configuration file placement
+dnl ---------------------------------------------------------------------------
+
+dnl FIXME: won't works
+dnl AC_DEFINE_DIR(FGIS_CONFDIR, "$sysconfdir", [Define this to the location of the global config file])
+AC_SUBST_DIR(FGIS_CONFDIR,"$sysconfdir")
+AC_DEFINE_UNQUOTED(FGIS_CONFDIR,"$FGIS_CONFDIR",[Define this to the location of the global config file])
+AC_SUBST(FGIS_CONFDIR,$FGIS_CONFDIR)