1make: cond-token-number.mk:16: Malformed conditional "-0" 2make: cond-token-number.mk:27: Malformed conditional "+0" 3make: cond-token-number.mk:38: Malformed conditional "!-1" 4make: cond-token-number.mk:49: Malformed conditional "!+1" 5make: Fatal errors encountered -- cannot continue 6make: stopped making "all" in unit-tests 7exit status 1 8