make: "cond-op-and.mk" line 36: Malformed conditional (0 || (${DEF} && ${UNDEF}))
make: "cond-op-and.mk" line 40: Malformed conditional (0 || (${UNDEF} && ${UNDEF}))
make: "cond-op-and.mk" line 42: Malformed conditional (0 || (!${UNDEF} && ${UNDEF}))
make: "cond-op-and.mk" line 71: Malformed conditional (0 &&& 0)
make: Fatal errors encountered -- cannot continue
make: stopped in unit-tests
exit status 1