1
 2all : one two
 3one: pre1 .WAIT pre2
 4two: pre2 pre1
 5pre1: ; @testhelp -q out start-$@ file PRE1 wait PRE2 out end-$@
 6pre2: ; @testhelp -q wait PRE1 out $@ file PRE2
 7
 8
 9# This is just here so we don't fail with older versions of make
10.WAIT: