1touch ../USSuYqRjB9/bar.y
2$@ = ../USSuYqRjB9/foo.x, $(@D) = ../USSuYqRjB9, $(@F) = foo.x
3$* = ../USSuYqRjB9/foo, $(*D) = ../USSuYqRjB9, $(*F) = foo
4$< = baz.z, $(<D) = ., $(<F) = baz.z
5$^ = baz.z ../USSuYqRjB9/bar.y, $(^D) = . ../USSuYqRjB9, $(^F) = baz.z bar.y
6$+ = baz.z ../USSuYqRjB9/bar.y baz.z, $(+D) = . ../USSuYqRjB9 ., $(+F) = baz.z bar.y baz.z
7$? = ../USSuYqRjB9/bar.y, $(?D) = ../USSuYqRjB9, $(?F) = bar.y
8touch ../USSuYqRjB9/foo.x