make: "cond-func.mk" line 36: Missing closing parenthesis for defined()
make: "cond-func.mk" line 51: Missing closing parenthesis for defined()
make: "cond-func.mk" line 54: Missing closing parenthesis for defined()
make: "cond-func.mk" line 94: The empty variable is never defined.
make: "cond-func.mk" line 102: A plain function name is parsed as !empty(...).
make: "cond-func.mk" line 109: A plain function name is parsed as !empty(...).
make: "cond-func.mk" line 119: Symbols may start with a function name.
make: "cond-func.mk" line 124: Symbols may start with a function name.
make: "cond-func.mk" line 130: Missing closing parenthesis for defined()
make: Fatal errors encountered -- cannot continue
make: stopped in unit-tests
exit status 1