What is the status of 64-bit development on Windows?

[Brad Anderson via Digitalmars-d]

On Monday, 20 October 2014 at 21:05:33 UTC, Joakim wrote:
> For 32-bit compilation, no, no additional download is 
> necessary.  For 64-bit, you need the Microsoft COFF linker and 
> C runtime.  The installer will try to automatically configure 
> dmd to use those if you have them already.  Have you tried it?

Just to add to this, use `dmd source.d -m64` to try it out and 
see if you're already configured and ready to go.