make: cond-token-number.mk:17: Malformed conditional "-0"
make: cond-token-number.mk:28: Malformed conditional "+0"
make: cond-token-number.mk:39: Malformed conditional "!-1"
make: cond-token-number.mk:50: Malformed conditional "!+1"
make: Fatal errors encountered -- cannot continue
make: stopped making "all" in unit-tests
exit status 1