Re: RFC: New approach to --with-cpu

[Richard Sandiford <rsandifo@redhat.com>]

Daniel Jacobowitz <drow@mvista.com> writes:
> > I suppose you could have:
> > 
> >   if (!option_present (*argcp, *argvp, "-march=")
> >       && (!option_present (*argcp, *argvp, "-mips")
> >           || option_present (*argcp, *argvp, "-mips16")))
> >     add_option (argcp, argvp, "-march=" XSTRING (TARGET_DEFAULT_OPTION_ARCH));
> > 
> > (since -mips16 shouldn't change the default arch) but maybe
> > there needs to be some sort of target macro?
> 
> That doesn't do quite the right thing, if you think about the logic. 
> It'd have to be "-mips1" or "-mips2" or "-mips3" or "-mips4" or
> "-mips5" (?) or "-mips32" or "-mips64".

Well, all -mips* options are handled by one entry in TARGET_SWITCHES, so
-mips16 overrides a previous -mips3, silly as that might be.  I guess to
be fully correct, you need to see if the last -mips option is -mips16, in
which case you keep the default, or something else, in which case you
don't.  (half ;-)

Richard