DDoc module description?

[Gary Willoughby via Digitalmars-d-learn]

On Monday, 20 October 2014 at 01:58:27 UTC, Jeremy DeHaan wrote:
> Is there no way to specify one at compile time?
> 
> Also, if I were to set the DDoc file like you suggest, does it 
> look for one locally to dmd.conf/sc.ini or to the source code?

See here for full information: http://dlang.org/ddoc.html
The compiler checks in various places for a valid ddoc file.