Rule 5-2-6 and dynamicaly loading (.dll / .so)

[udi]

I think the behavior of explicit dynamic linking with dlopen/dlsym is undefined if the function signature does not match:

You might be right about this, but the way this rule is written, it prevents the use of this functionality even if the signatures match.

I would always prefer implicit dynamic linking (e.g. -llibrary) because of the type checking involved

I would also prefer this, but this prevents me from supllying an SDK, for which a project can write its own plugins.
Same problem arises if I am using a 3rd party SDK.