1make: "cond-token-string.mk" line 13: Unknown modifier 'Z' 2make: "cond-token-string.mk" line 13: Malformed conditional ("" != "${:Uvalue:Z}") 3make: "cond-token-string.mk" line 22: xvalue is not defined. 4make: "cond-token-string.mk" line 28: Malformed conditional (x${:Uvalue} == "") 5make: "cond-token-string.mk" line 37: Expected. 6CondParser_Eval: "UNDEF" 7make: "cond-token-string.mk" line 46: The string literal "UNDEF" is not empty. 8CondParser_Eval: " " 9make: "cond-token-string.mk" line 55: The string literal " " is not empty, even though it consists of whitespace only. 10CondParser_Eval: "${UNDEF}" 11make: "cond-token-string.mk" line 64: An undefined variable in quotes expands to an empty string, which then evaluates to false. 12CondParser_Eval: "${:Uvalue}" 13make: "cond-token-string.mk" line 68: A nonempty variable expression evaluates to true. 14CondParser_Eval: "${:U}" 15make: "cond-token-string.mk" line 76: An empty variable evaluates to false. 16make: Fatal errors encountered -- cannot continue 17make: stopped in unit-tests 18exit status 1 19