I think the point Ian was trying to make with (3) was simply that it doesn't matter whether you choose to implement the reports of unknown -Wno-* (ie (2)) using the existing warning mechanism or by just printing to stderr. So it isn't a separate thing that needs to be done.
I think the point Ian was trying to make with (3) was simply that it doesn't matter whether you choose to implement the reports of unknown -Wno-* (ie (2)) using the existing warning mechanism or by just printing to stderr. So it isn't a separate thing that needs to be done.