C++ modularization framework (like OSGI)

SOF http://www.codeproject.com/KB/library/SOF_.aspx

OSP

The authors of the open source Portable Components library (POCO) have also developed a modular framework based on OSGI called OSP or Open Service Platform.http://www.appinf.com/en/products/osp.html. It's not open source however.

CTK:

There is also BlueBerry http://www.blueberry-project.org which implements a component based framework inspired by OSGi. It also comes with an application framework similar to the Eclipse RCP.

A rewrite of the BlueBerry core can be found in the CTK PluginFramework library (based on Qt Core):Introduction, GitHub Code .

I've never seen a solution to the whole problem, but I implemented something similar usingQt plugins.

The part Qt did nicely (that C++ by itself doesn't implement) was handling C++ OO interfaces in dynamically loadable modules. Because of C++ name-mangling being non-standard, usually DLLs don't have C++ interfaces, only C interfaces. Qt did it with it's meta-object system, and it worked really cleanly for me.