make: "cond-undef-lint.mk" line 25: Variable "UNDEF" is undefined make: "cond-undef-lint.mk" line 25: Malformed conditional (${UNDEF}) make: "cond-undef-lint.mk" line 43: Variable "UNDEF" is undefined make: "cond-undef-lint.mk" line 43: Variable "VAR." is undefined make: "cond-undef-lint.mk" line 43: Malformed conditional (${VAR.${UNDEF}}) make: "cond-undef-lint.mk" line 56: Variable "VAR.defined" is undefined make: "cond-undef-lint.mk" line 56: Malformed conditional (${VAR.${DEF}}) make: Fatal errors encountered -- cannot continue make: stopped in unit-tests exit status 1