1make: "cond-token-number.mk" line 15: Malformed conditional (-0) 2make: "cond-token-number.mk" line 25: Malformed conditional (+0) 3make: "cond-token-number.mk" line 35: Malformed conditional (!-1) 4make: "cond-token-number.mk" line 45: Malformed conditional (!+1) 5make: Fatal errors encountered -- cannot continue 6make: stopped in unit-tests 7exit status 1 8