1
 2.SECONDEXPANSION:
 3.SUFFIXES:
 4.DEFAULT: ; @echo '$@'
 5
 6$(dir)/foo $(dir)/bar: $@.x $$@.x $$$@.x $$$$@.x $$(@D).x $$(@F).x
 7
 8$(dir)/x.z $(dir)/y.z: $(dir)/%.z : $@.% $$@.% $$$@.% $$$$@.% $$(@D).% $$(@F).%
 9
10$(dir)/biz: $$(@).x $${@}.x $${@D}.x $${@F}.x