1make: "cond-undef-lint.mk" line 23: Variable "UNDEF" is undefined 2make: "cond-undef-lint.mk" line 38: Variable "UNDEF" is undefined 3make: "cond-undef-lint.mk" line 38: Variable "VAR." is undefined 4make: "cond-undef-lint.mk" line 49: Variable "VAR.defined" is undefined 5make: Fatal errors encountered -- cannot continue 6make: stopped in unit-tests 7exit status 1 8