1make: "directive-ifmake.mk" line 14: ok: positive condition works 2make: "directive-ifmake.mk" line 26: ok: negation works 3make: "directive-ifmake.mk" line 36: ok: double negation works 4make: "directive-ifmake.mk" line 44: ok: both mentioned 5make: "directive-ifmake.mk" line 52: ok: only those mentioned 6make: "directive-ifmake.mk" line 63: Targets can even be added at parse time. 7make: "directive-ifmake.mk" line 82: ok 8: first 9: second 10: late-target 11make: don't know how to make !edge (continuing) 12 13Stop. 14make: stopped in unit-tests 15exit status 1 16