1 S:=simple 2 R=recursive 3 SE:= 4 RE= 5 6 foo=FOO 7 bar= 8 9 S+=$(foo) $(bar) 10 R+=$(foo) $(bar) 11 SE+=$(foo) $(bar) 12 RE+=$(foo) $(bar) 13 U+=$(foo) $(bar) 14 15 bar=BAR 16 17 test: 18 echo "$(S)" 19 echo "$(R)" 20 echo "$(SE)" 21 echo "$(RE)" 22 echo "$(U)" 23 echo "$(flavor S)" 24 echo "$(flavor R)" 25 echo "$(flavor SE)" 26 echo "$(flavor RE)" 27 echo "$(flavor U)" 28