[PATCH] D28898: [ELF] - Allow emulation to be different from input objects target.

[Rafael Avila de Espindola via llvm-commits]

> +  // Take machine type from emulation first. That is done early so
> +  // we are able to report wrong emulation values if any.
> +  if (!Config->Emulation.empty()) {
> +    std::tie(Config->EKind, Config->EMachine, Config->OSABI) =
> +        parseEmulation(Config->Emulation);
> +    Config->MipsN32Abi = Config->Emulation == "elf32btsmipn32" ||
> +                         Config->Emulation == "elf32ltsmipn32";
> +  }

What breaks without this? I am probably OK with completely ignoring -m
if a .o is present (which I assume is what gold does), but it feels odd
to use only some bits of it.

Cheers,
Rafael