make: "opt-debug-lint.mk" line 19: Variable "X" is undefined make: "opt-debug-lint.mk" line 41: Variable "UNDEF" is undefined make: "opt-debug-lint.mk" line 61: Missing delimiter ':' after modifier "L" make: "opt-debug-lint.mk" line 61: Missing delimiter ':' after modifier "P" make: "opt-debug-lint.mk" line 69: Unknown modifier "${" make: Fatal errors encountered -- cannot continue make: stopped in unit-tests exit status 1