Building (and including libraries) without dub

[Hasen Judy via Digitalmars-d-learn]

Building simple programs without dub is easy, just pass a list of 
.d source files to `dmd` or `ldc2`.

What if I want to include a 3rd party library? Surely before dub 
existed, people were incorporating other libraries in their 
projects.

I want to learn how this works from first principles. I've been 
working with dynamic/interpreted languages for too long, I forgot 
what it's like to build native programs without a dependency 
manager.

Any help would be appreciated!