building a D app with multiple source files

[Vladimir Panteleev via Digitalmars-d-learn]

On Tuesday, 5 August 2014 at 07:51:53 UTC, nikki wrote:
>> Correction:
>>
>> rdmd -Isource example/source/app.d
>
> that one worked, woohoo thanks.
>
> what did the -Isource do? it's not in the 'rdmd --help'

You'll find it in dmd's --help. It adds the "source" directory to 
the search path, the list of directories where the compiler looks 
for imported modules.