It's an option. Alternatively, you should be able to replace any existing definition from the macrolib with your own, IE: if you declare an RV macro it will replace the built-in one.
Or you can switch the whole thing off with -nomlib. I would make consider grouping macros into blocks and having on/off per block.. but not per macro there would be too many options, and ordinal wouldn't work as the order may change.
