1 make: "directive-ifmake.mk" line 10: ok: positive condition works 2 make: "directive-ifmake.mk" line 21: ok: negation works 3 make: "directive-ifmake.mk" line 27: ok: double negation works 4 make: "directive-ifmake.mk" line 34: ok: both mentioned 5 make: "directive-ifmake.mk" line 41: ok: only those mentioned 6 make: "directive-ifmake.mk" line 51: Targets can even be added at parse time. 7 make: "directive-ifmake.mk" line 69: ok 8 : first 9 : second 10 : late-target 11 exit status 0 12