+if HAVE_NETLINK
+libavahi_core_la_SOURCES += \
+ iface-linux.c iface-linux.h \
+ netlink.c netlink.h
+else
+if HAVE_PF_ROUTE
+libavahi_core_la_SOURCES += \
+ iface-pfroute.c iface-pfroute.h
+else
+libavahi_core_la_SOURCES += \
+ iface-none.c
+endif
+endif