Darren Reed <darrenr@reed.wattle.id.au> writes:
> There are things around (including IP Filter) which use -I/sys, etc.

IP filter should _not_ use /sys, that's certainly true.

there's no reason to believe whatsoever that /sys will actually
correspond to the tree used to build the kernel... if it exists at all.

-- 
Chris Demetriou - cgd@netbsd.org - http://www.netbsd.org/People/Pages/cgd.html
Disclaimer: Not speaking for NetBSD, just expressing my own opinion.