-AC_CHECK_LIB(gps, gps_open, GPS_LIBS="-lgps")
-AM_CONDITIONAL(HAVE_GPSD, test "$GPS_LIBS" != "")
-AC_DEFINE([HAVE_GPSD], [1], [GPSD support])
-AC_SUBST(GPS_LIBS)
+AC_ARG_WITH([gps], AS_HELP_STRING([--with-gps], [Build with gpsd support]))
+
+if test "x$with_gps" = "xyes"; then
+ PKG_CHECK_MODULES(GPSD, libgps >= 3.0)
+ AC_DEFINE([HAVE_GPSD], [], [Have GPSD support])
+ AC_SUBST(HAVE_GPSD, [TRUE])
+fi
+AM_CONDITIONAL([HAVE_GPSD], test "$HAVE_GPSD" = "TRUE")
+
+# PKG_CHECK_MODULES(GPSD, libgps >= 3.0)
+#AC_ARG_WITH([gps], AS_HELP_STRING([--with-gps], [Build with gpsd support]))
+#AS_IF([test "x$with_gps" = "xyes"], [
+# PKG_CHECK_MODULES([GPSD], [libgps >= 3.0],
+# [AC_DEFINE([HAVE_GPSD], [1], [Use GPSD])],
+# [AC_DEFINE([HAVE_GPSD], [0], [No GPSD])]
+# ])