[OVS_DEFINE([HAVE_INET_FRAGS_CONST])])
OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [last_in],
[OVS_DEFINE([HAVE_INET_FRAGS_LAST_IN])])
+ OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frags],
+ [frags_work])
OVS_GREP_IFELSE([$KSRC/include/net/dst_metadata.h], [metadata_dst])