* You should issue an error message if the old (now deprecated)
-milp32 or -mlp64 command line options are used.
I agree that in general the deprecation shall communicate more friendly
error message to the existing usage, but in this particular case, I
think it is less required to do so as it is very unlikely -milp32 and
-mlp64 have been used by the community so far. The options were added
only a few weeks ago and the related patch for the gcc driver has not
been committed to the upstream yet. So I think it shall be fine to
simply remove the support for the two options. What do you think?