make: "cond-cmp-string.mk" line 18: Malformed conditional (str != str)
make: "cond-cmp-string.mk" line 37: Malformed conditional ("string" != "str""ing")
make: "cond-cmp-string.mk" line 42: warning: String comparison operator must be either == or !=
make: "cond-cmp-string.mk" line 42: Malformed conditional (!("value" = "value"))
make: "cond-cmp-string.mk" line 49: Malformed conditional (!("value" === "value"))
make: Fatal errors encountered -- cannot continue
make: stopped in unit-tests
exit status 1