how to NOT export symbols in statically linked 3rd party shared libs

[Joern Rennecke]

> What I really want to make sure is that at runtime, local symbols (the
> ones not exported) will have precedence over exported (colliding)
> symbols of other libs.

You might try first doing an incremental link of the third-party
libraries, get a list of all visible symbols with nm, filter out
the ones you want to keep visible, and use the
--localize-symbols=filename option of objcopy to localize the rest.