[Haskell-beginners] Module structure

[David Frey]

On Fri, 27 Feb 2009 18:26:51 +0100, Chaddaï Fouché
<chaddai.fouche at gmail.com> wrote:
> On Fri, Feb 27, 2009 at 5:36 PM, Colin Paul Adams
> <colin at colina.demon.co.uk> wrote:
>> If I want to write part of the code for my program as a library, and
>> so put those modules into a hierarchical module structure (with the
>> non-library code in no module), do I have to structure the directories
>> in a special way to get the module search to work?
> 
> Yes, module My.Pretty.Little.Module must be in file
> "My/Pretty/Little/Module.hs" in one of the root directories (which can
> be specified on the command line to ghc, or in the .cabal file if you
> use an unusual directory structure).
> Note that this only apply before compiling, the executable is
independent.

This last line sounds a bit fishy to me.  I think what would happen here is
that you would create a separate module, but when your application is
linked, any code that is used from that module would be compiled and
included into your binary.  I suspect that what Colin may have been looking
for are instructions on how to create a standalone library that his
application can dynamically link to.  I'm curious about this as well.