How to compile Phobos with other D code to create a shared library?

[data pulverizer]

On Monday, 31 May 2021 at 21:26:15 UTC, Steven Schveighoffer 
wrote:
>
> You need to call it wherever you think it might not have been 
> called yet.
>
> It's reentrant, so if you call it more than once, it will only 
> initialize once, and count how many times you have to call 
> `Runtime.terminate`.
>
> Best to use a `scope(exit)` to call `Runtime.terminate` if you 
> are calling it periodically.

Many thanks!

Something interesting is using arrays. I can see that if you 
instantiate an array within the D function using `new`, for 
instance

```
auto result = new double[n];
```

you can't return that array to Julia (or whatever) if your 
function does

```
scope(exit) Runtime.terminate();
```

and it segfaults. But while you can do:

```
auto result = cast(double*)malloc(double.sizeof * n);
```

you're left with the issue of not being able to free the memory 
since you've terminated the runtime.

So I guess you have to appropriately pair up `initialize` and 
`terminate` as appropriate to kind of *startup* and and 
*shutdown* the connection with druntime with your allocations if 
they stay within D?