With up-to-date source on i386:

#    create  libipf/debug.d
CC=/usr/BUILD/tools/bin/i386--netbsdelf-gcc /usr/BUILD/tools/bin/nbmkdep -f debu
g.d --      -I/usr/src/dist/ipf -I/usr/src/dist/ipf/tools -I/usr/src/sys -I/usr/
src/sys/dist/ipf -I/usr/src/sys/dist/ipf/netinet -DSTATETOP -D__UIO_EXPOSE -DINE
T -DINET6   -nostdinc -isystem /usr/BUILD/netbsd/usr/include  /usr/src/dist/ipf/
lib/debug.c
nbmake: don't know how to make extras.c. Stop

nbmake: stopped in /usr/src/usr.sbin/ipf/libipf



		--Steve Bellovin, http://www.cs.columbia.edu/~smb