Why -mtune=atom?

[Bastien Nocera]

----- Original Message -----
> The default CFLAGS set by RPM include “-mtune-atom”.
> 
> Why?  I doubt Atom CPUs are Fedora's primary target.

It's what's used in many lower price tablets, all-in-ones and laptops.
I would think it fits with the "enthusiast" target.

>  It's not even a
> documented GCC option.  There is such a wide variety of CPUs under this
> label that it's not even clear what it would mean.
> 
> If it's better than “-mtune=generic” or the GCC default, shouldn't GCC
> be fixed?