I'm building on the VAX with DESTDIR set and object directories, the result 
is that doing a
'make dependall' in /usr/src/lib/librpcsvc fails because the include files 
that were generated in the make includes section can't be found. My fix was 
to add:

CFLAGS += -I/usr/src/lib/librpcsvc
LINTFLAGS+= -I/usr/src/lib/librpcsvc

after the the include <bsd.lib.mk> line. This lets them be found and the 
library builds. However, I'm guessing the real fix is to have make includes 
put the generated .h files in obj. Comments?

--Chuck