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