make: "cond-op-and.mk" line 36: Malformed conditional '0 || (${DEF} && ${UNDEF})'
make: "cond-op-and.mk" line 41: Malformed conditional '0 || (${UNDEF} && ${UNDEF})'
make: "cond-op-and.mk" line 44: Malformed conditional '0 || (!${UNDEF} && ${UNDEF})'
make: "cond-op-and.mk" line 60: Unknown operator '&'
make: "cond-op-and.mk" line 66: Unknown operator '&'
make: "cond-op-and.mk" line 72: Unknown operator '&'
make: "cond-op-and.mk" line 78: Unknown operator '&'
make: "cond-op-and.mk" line 87: Unknown operator '&'
make: Fatal errors encountered -- cannot continue
make: stopped in unit-tests
exit status 1