compile: link dynamic OR static library in Windows

[Alexander Zhirov]

I have never programmed in Windows, so I don't quite understand 
how to link the library correctly. I have a compiled Postgres 
library from under mingw. There is both a static library `*.a` 
and a dynamic library `*.dll`. I don't understand how to compile 
my project correctly at all. I tried to do everything through dub 
first.json, then I realized that the idea was too rash and 
decided to compile a simple project through the CLI. In the end , 
here 's what happened:

```sh
PS C:\sources\pxe-restore\source> dmd -i app.d 
-LC:\msys64\home\user\postgresql-15.1\installed\mingw64\lib\libpq.dll
lld-link: error: 
C:\msys64\home\user\postgresql-15.1\installed\mingw64\lib\libpq.dll: bad file type. Did you specify a DLL instead of an import library?
lld-link: error: could not open 'pq.lib': no such file or 
directory
Error: linker exited with status 1
```

After Googling a bit, I came across [this 
page](https://wiki.dlang.org/Win32_DLLs_in_D#Using_a_D_class_from_a_DLL). Do I really need to rewrite the header of the Postgres library to use it in my project?

Do I need to list all the functions called from the library? Or 
is there a way to somehow attach it in a more civilized way 
through a simple `dmd`?