make: "opt-debug-lint.mk" line 21: Variable "X" is undefined
make: "opt-debug-lint.mk" line 21: Malformed conditional '$X'
make: "opt-debug-lint.mk" line 45: Variable "UNDEF" is undefined
make: "opt-debug-lint.mk" line 45: Malformed conditional '${UNDEF}'
make: "opt-debug-lint.mk" line 67: Missing delimiter ':' after modifier "L"
	while evaluating variable "value" with value "value"
make: "opt-debug-lint.mk" line 67: Missing delimiter ':' after modifier "P"
	while evaluating variable "value" with value "value"
make: "opt-debug-lint.mk" line 76: Unknown modifier "${"
	while evaluating variable "value" with value ""
make: Fatal errors encountered -- cannot continue
make: stopped in unit-tests
exit status 1