[CMake] Newbie question: Static linking

[Michael Wild]

On 05/23/2011 05:09 PM, Sanatan Rai wrote:
> On 23 May 2011 16:00, Michael Wild <themiwi at gmail.com> wrote:
>> Everything that relies on static/global initialization to register
>> factories is an implicit scheme. An explicit scheme is where the
>> dependent code (e.g. the main() function) calls a function to do the
>> registration.
> 
>    Ok, got you. However, would this not imply a monolithic build? How is
> main to know that an object of a type belonging to a base class of interest
> exists in linked library?
> 
>    As I mentioned earlier, I did this a little more explicitly in a
> .NET project in the following
> manner:
> 
>   * I had a factory object, whose job it was to hold creator functions
> for objects of classes
>     derived from a base class of interest.
> 
>  * The factory was a singleton, and had a static method that could be
> called. The method loaded
>    all linked assemblies, and picked out classes that were derived
> from the base class.
> 
>   * Then it explicitly registered the class with the factory.
> 
> This seems to me to be a hybrid between implicit and explicit
> registration. The actual mechanics
> as one might imagine relied heavily on .NET reflection calls. One of
> the ugliest bits of code I have
> ever written.
> 
> --Sanatan


If it is acceptable to have just one "hook", just require your user to
define a specific function, e.g. registerUserFactories which you then
call. Otherwise it becomes more tricky.

Michael