llvm dev - May 2019 - generic solution for non-strong link to symbols

I'm posting this to see anyone else has found a solution for the problem of
type info. My compiler emits type info for a type which contains:
 * References to other types
 * Reference to methods and static fields in this type

The problem here is that using rtti from one type pulls in an insane amount of
other stuff that most likely won't be needed at all. I would prefer if the
things that are not used otherwise are null, however I see no good solution on
how to do this. I considered WEAK and LINKONCE, but both seem to solve the
opposite problem, and link in the target symbol if it exists at all, and I only
want it to be linked in if anything else strongly references it.

Anyone else have this problem and found a workable solution, preferably one that
works on win, lin and darwin?

Carlo Kok