[Bug driver/61106] [4.8/4.9/4.10 Regression] impliedness of -Wunused-parameter depends on -W option ordering

[manu at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=61106

--- Comment #7 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
Please take the patch as yours. I don't have time at the moment to do all the
submission+pinging. (And perhaps it could be backported to GCC 4.9 and 4.8. It
is really a regression.)