+AM_CONDITIONAL(WITH_IPSEC, test "$with_ipsec" = "1")
+AC_SUBST(IPSEC,[-DIPSEC=${with_ipsec}])
+
+AM_CONDITIONAL(WITH_VCGN, test "$with_vcgn" = "1")
+AC_SUBST(VCGN,[-DVCGN=${with_vcgn}])
+
+AM_CONDITIONAL(WITH_IPV6SR, test "$with_ipv6sr" = "1")
+AC_SUBST(IPV6SR,[-DIPV6SR=${with_ipv6sr}])
+