1
 2.RECIPEPREFIX = >
 3result :: 01
 4> @echo update
 5> @touch $@
 6result :: 02
 7> @echo update
 8> @touch $@
 9result :: 03
10> @echo update
11> @touch $@
12result :: 04
13> @echo update
14> @touch $@
15result :: 05
16> @echo update
17> @touch $@
1801 02 03 04 05:
19> @touch 01 02 03 04 05