1make: "cond-op-or.mk" line 36: Variable "UNDEF" is undefined 2make: "cond-op-or.mk" line 41: Variable "UNDEF" is undefined 3make: "cond-op-or.mk" line 44: Variable "UNDEF" is undefined 4make: "cond-op-or.mk" line 60: Unknown operator '|' 5make: "cond-op-or.mk" line 66: Unknown operator '|' 6make: "cond-op-or.mk" line 72: Unknown operator '|' 7make: "cond-op-or.mk" line 78: Unknown operator '|' 8make: "cond-op-or.mk" line 87: Unknown operator '|' 9make: Fatal errors encountered -- cannot continue 10make: stopped in unit-tests 11exit status 1 12