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