1
 2all : p1 .WAIT np1
 3
 4p1: pre1 pre2
 5pre1: ; @testhelp -q out start-$@ file PRE1 wait PRE2 out end-$@
 6pre2: ; @testhelp -q wait PRE1 out $@ file PRE2
 7
 8
 9np1: npre1 npre2
10npre1: ; @testhelp -q out start-$@ sleep 1 out end-$@
11npre2: ; @testhelp -q out $@
12
13.NOTPARALLEL: np1