RFC: Support link with mixed IR/non-IR objects

[Andi Kleen]

> I encourage people who favor a different approach to implement
> it for Linux kernel build and submit patches to Linux kernel.  If
> it is really a good idea, I believe Linux kernel people will listen.
> But asking Linux kernel to abandon a working build system
> without providing an alternative working implementation won't
> work with Linux kernel.
>
Also any different approach needs to work with older binutils too.

-Andi