> I'd like to add an optional third field to machine_spec in the
> grammar, so I can say "machine sun2 m68k sun68k" in my std.sun2.

> This field would be completely optional.  It might be useful to the
> hpc* ports too?  Comments?

Why limit it to two additional names?  Why not accept a (more or less)
arbitrary number of them, from zero upwards?

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