make: "cond-func.mk" line 37: Missing closing parenthesis for defined() make: "cond-func.mk" line 53: Missing closing parenthesis for defined() make: "cond-func.mk" line 57: Missing closing parenthesis for defined() make: "cond-func.mk" line 91: Unknown operator '&' make: "cond-func.mk" line 107: A plain function name is parsed as defined(...). make: "cond-func.mk" line 115: A plain function name is parsed as defined(...). make: "cond-func.mk" line 126: Symbols may start with a function name. make: "cond-func.mk" line 132: Symbols may start with a function name. make: "cond-func.mk" line 138: Missing closing parenthesis for defined() make: Fatal errors encountered -- cannot continue make: stopped in unit-tests exit status 1