I'm sceptical anyone is actually using flashrom on DOS. Personally I'd drop it as a build target.
It is still used, and we have build instructions. Someone recently built flashrom for DOS following the instructions. So even if it's not a very common use case, it's still a use case. We are not dropping it for now :)
You can expect a short chain of patches in fairly short order, unless I encounter unexpected difficulties. :)
Sounds great!