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

[dg1980]

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

Code:

int (*ptr)(void) = static_cast(dlsym(handle, "func"));// no way to check the return value e.g. the signature of func
if (ptr != nullptr)
  ptr();// undefined behavior if func is not defined as int func(void) inside the shared object

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