make: "cond-op-or.mk" line 36: Malformed conditional (1 && (!${DEF} || ${UNDEF})) make: "cond-op-or.mk" line 41: Malformed conditional (1 && (!${UNDEF} || ${UNDEF})) make: "cond-op-or.mk" line 44: Malformed conditional (1 && (${UNDEF} || ${UNDEF})) make: "cond-op-or.mk" line 60: Unknown operator '|' make: "cond-op-or.mk" line 66: Unknown operator '|' make: "cond-op-or.mk" line 72: Unknown operator '|' make: "cond-op-or.mk" line 78: Unknown operator '|' make: "cond-op-or.mk" line 87: Unknown operator '|' make: Fatal errors encountered -- cannot continue make: stopped in unit-tests exit status 1