1Global: ASSIGNED = value 2Global: SUBST = # (empty) 3Global: SUBST = value 4Var_Parse: y(ASSIGNED) (eval) 5Var_Parse: $U (eval-defined-loud) 6make: opt-debug-var.mk:34: Variable "U" is undefined 7Var_Parse: $< (eval-defined-loud) 8make: opt-debug-var.mk:40: Variable "<" is undefined 9Global: .MAKEFLAGS = -r -k -d v -d 10Global: .MAKEFLAGS = -r -k -d v -d 0 11make: Fatal errors encountered -- cannot continue 12make: stopped in unit-tests 13exit status 1 14