make: "cond-op.mk" line 51: Malformed conditional ("!word" == !word)
make: "cond-op.mk" line 72: Malformed conditional (0 ${ERR::=evaluated})
make: "cond-op.mk" line 77: A misplaced expression after 0 is not evaluated.
make: "cond-op.mk" line 82: Malformed conditional (1 ${ERR::=evaluated})
make: "cond-op.mk" line 87: A misplaced expression after 1 is not evaluated.
make: "cond-op.mk" line 93: A B C   =>   (A || B) && C   A || B && C   A || (B && C)
make: "cond-op.mk" line 108: 0 0 0   =>   0               0             0
make: "cond-op.mk" line 108: 0 0 1   =>   0               0             0
make: "cond-op.mk" line 108: 0 1 0   =>   0               0             0
make: "cond-op.mk" line 108: 0 1 1   =>   1               1             1
make: "cond-op.mk" line 108: 1 0 0   =>   0               1             1
make: "cond-op.mk" line 108: 1 0 1   =>   1               1             1
make: "cond-op.mk" line 108: 1 1 0   =>   0               1             1
make: "cond-op.mk" line 108: 1 1 1   =>   1               1             1
make: "cond-op.mk" line 120: Malformed conditional (1 &&)
make: "cond-op.mk" line 129: Malformed conditional (0 &&)
make: "cond-op.mk" line 138: Malformed conditional (1 ||)
make: "cond-op.mk" line 148: Malformed conditional (0 ||)
make: Fatal errors encountered -- cannot continue
make: stopped in unit-tests
exit status 1