1SYSDIR?=${SRCTOP}/sys 2.PATH: ${SYSDIR}/net ${SYSDIR}/netinet ${SYSDIR}/netinet6 3 4KMOD= if_gif 5SRCS= if_gif.c opt_inet.h opt_inet6.h 6SRCS.INET=in_gif.c 7SRCS.INET6=in6_gif.c 8 9EXPORT_SYMS= YES 10 11.include <bsd.kmod.mk> 12