linux-libre/include/uapi/linux/netfilter_ipv4/Kbuild

# UAPI Header export list
header-y += ip_tables.h
header-y += ipt_CLUSTERIP.h
header-y += ipt_ECN.h
header-y += ipt_LOG.h
header-y += ipt_REJECT.h
header-y += ipt_TTL.h
header-y += ipt_ah.h
header-y += ipt_ecn.h
header-y += ipt_ttl.h