1make: "cond-op-parentheses.mk" line 13: Parentheses can be nested at least to depth 112. 2make: "cond-op-parentheses.mk" line 19: Malformed conditional (() 3make: "cond-op-parentheses.mk" line 29: Malformed conditional ()) 4make: Fatal errors encountered -- cannot continue 5make: stopped in unit-tests 6exit status 1 7