K 10
svn:author
V 6
brooks
K 8
svn:date
V 27
2020-03-17T18:17:32.667953Z
K 7
svn:log
V 283
Support SUBDIR.${MK_FOO}.${MK_BAR} expresssions.

This allows simplification of Makefiles where some SUBDIR entries depend
on two things (e.g. something that depends on C++ and some other knob).

Discussed with:	imp, jhb
Obtained from:	CheriBSD
MFC after:	3 days
Sponsored by:	DARPA

END