1make: "cond-undef-lint.mk" line 24: Variable "UNDEF" is undefined 2make: "cond-undef-lint.mk" line 35: Variable "VAR." is undefined 3make: "cond-undef-lint.mk" line 45: Variable "VAR.defined" is undefined 4make: Fatal errors encountered -- cannot continue 5make: stopped in unit-tests 6exit status 1 7