D enters Tiobe top 20

[jmh530]

On Friday, 6 March 2020 at 16:37:08 UTC, SrMordred wrote:
> [snip]
>
> Easier C interop.
> I Love D but lots of times i start to think of returning to C.
> I don´t like having to manage bindings , I need something 
> faster that I can just put my C headers there and make it work 
> like I would in C. I love Atilla´s DPP work, but its not 
> *there* yet.
>
> [snip]

With respect to C interop specifically, what does dpp need to be 
*there*?