In this case, disable wrapping of fake opt_*.h targets in

"if defined(KERNBUILDDIR)" for now since the new way of
building modules with the kernel can't handle dynamic SRCS
depending on build options yet.

sys/modules/if_gif/Makefile

@@ -9,7 +9,9 @@ SRCS=	if_gif.c in_gif.c opt_inet.h opt_inet6.h opt_mac.h \
 SRCS+=	in6_gif.c
 .endif
 
-.if !defined(KERNBUILDDIR)
+# XXX The new way of building modules with the kernel can't handle
+#     dynamic SRCS depending on build options yet.
+##.if !defined(KERNBUILDDIR)
 opt_inet.h:
 	echo "#define INET 1" > ${.TARGET}
 
@@ -20,6 +22,6 @@ opt_inet6.h:
 
 opt_mrouting.h:
 	echo "#define MROUTING 1" > ${.TARGET}
-.endif
+##.endif
 
 .include <bsd.kmod.mk>