crt_constructor / LDC_global_crt_ctor not being called

[Marcel]

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();