I don't understand the question. Whether a library is split-objs or not does not affect how you link an executable, only the space/time efficiency trade-off of doing so. And while in theory you might see improvements by split-objs-ing an executable, it doesn't make a whole lot of sense to include dead code in an executable in the first place (whereas functionality of a library that you aren't using is dead for *your* use but not for other consumers of the library).