How to use std. packages in so files written in dlang

[Mike Parker via Digitalmars-d-learn]

On Friday, 12 August 2016 at 01:36:34 UTC, grampus wrote:
> On Friday, 12 August 2016 at 01:09:47 UTC, ketmar wrote:
>> On Friday, 12 August 2016 at 00:57:42 UTC, grampus wrote:
>>
>> it's 'cause you didn't initialized druntime. you have to use 
>> dlsym to get "rt_init" function and call it right after 
>> loading your .so, but before calling any other API from it.
>>
>> also, note that druntime is using SIGUSR1 and SIGUSR2 for it's 
>> internal housekeeping, so don't use this signals in your C++ 
>> code.
>
> Thank you for the quick reply.
> Do you mean that I have to do some changes on the C side?
> I can use dlang in this existing project as long as nothing can 
> be changed on the C side.
> Do you think I can use dlang in our case?
>
> Thank you

One way to handle this is to add initialize/terminate functions 
to your shared library. In that case, rather than rt_init, you 
can call the Runtime functions [1]:

import core.runtime;

extern(C) int initialize() { return Runtime.initialize(); }
extern(C) int terminate() { return Runtime.terminate(); }

 From your C program, call initialize after loading the library 
and terminate before exiting.

[1] http://dlang.org/phobos/core_runtime.html#.Runtime