1SYSDIR?=${SRCTOP}/sys 2.include "${SYSDIR}/conf/kern.opts.mk" 3 4.PATH: ${SYSDIR}/net 5 6KMOD= if_enc 7SRCS= if_enc.c opt_inet.h opt_inet6.h opt_ipsec.h 8 9.include <bsd.kmod.mk> 10