Best way to confine project to 64 bit builds only?

[Basile B.]

On Saturday, 17 October 2020 at 14:50:47 UTC, NonNull wrote:
> I have inherited an open source C project that assumes that the 
> size of a long and the size of a pointer are the same, and I 
> have translated it into very similar D just like 
> https://dlang.org/blog/2018/06/11/dasbetterc-converting-make-c-to-d/
>
> D has the size of long fixed at 64 bits, so a pointer now has 
> to be 64 bits.

No it's wrong. A pointer always has the size of a general purpose 
register.

> So I want to put something into the source to ensure an attempt 
> to make a 32 bit build fails. What is the best way to do this?

anyway you have several options:

---
version(X86)
     static assert (false, "not for i386");
---

or

---
static assert (size_t.sizeof != 4, "blablalala");
---