Interfacing D with C: Getting Started

[Mike Parker]

On Wednesday, 6 December 2017 at 04:14:35 UTC, Arun 
Chandrasekaran wrote:
>> In D, long and ulong are always 8 bytes. This lines up with 
>> most 64-bit systems under the version(Posix) umbrella, where 
>> long and unsigned long are also 8 bytes. However, they are 4 
>> bytes on 32-bit architectures. Moreover, they’re always 4 
>> bytes on Windows, even on a 64-bit architecture.
>
> Why is this? How are we expected to write cross platform code 
> with long/ulong? What are the alternatives?

It's right there in the blog post:

import core.stdc.config : c_ulong, clong;