1
 2all: baz
 3
 4foo:: f1.h ; @echo foo FIRST
 5foo:: f2.h ; @echo foo SECOND
 6
 7bar:: ; @echo aaa; sleep 1; echo aaa done
 8bar:: ; @echo bbb
 9
10baz:: ; @echo aaa
11baz:: ; @echo bbb
12
13biz:: ; @echo aaa
14biz:: two ; @echo bbb
15
16two: ; @echo two
17
18f1.h f2.h: ; @echo $@
19
20d :: ; @echo ok
21d :: d ; @echo oops