make: "cond-token-var.mk" line 21: ok
make: "cond-token-var.mk" line 28: Malformed conditional '${UNDEF} == ${DEF}'
make: "cond-token-var.mk" line 34: Malformed conditional '${DEF} == ${UNDEF}'
make: "cond-token-var.mk" line 44: Malformed conditional '${UNDEF}'
make: Fatal errors encountered -- cannot continue
make: stopped in unit-tests
exit status 1