crt_constructor / LDC_global_crt_ctor not being called

[IGotD-]

On Monday, 13 April 2020 at 17:32:19 UTC, Marcel wrote:
> On Monday, 13 April 2020 at 17:29:05 UTC, Marcel wrote:
>> Hello!
>> I tried using both crt_constructor and LDC_global_crt_ctor to 
>> execute a piece of code before main(), but it's not being 
>> called. Is this normal?
>> Here's the function declaration, I'll post the implementation 
>> if needed:
>>
>> pragma(crt_constructor)
>> extern(C)
>> void init_state();
>
> Oh, I forgot to mention: The test program imports a static 
> library that contains the function. Both are in betterC mode.

If you compile you create an optional map file, check if the 
function is there or not. If it is not there is suspect the 
linker discards it because it isn't used. If it the function 
pointer goes into the section .init_array or .ctor, then the 
linker shouldn't discard the function at all.

If you using a custom linker script, then you have to add the 
.init_array sections by hand. If you are using the elf format you 
can use readelf -l myexefile, in order to see if .init_array is 
included in any load sections.

If you have ctor function in you main module, will it be run in 
that case?