ignoring certain undefined symbols

[Simon Richter]

Hi,

I'm building a project where a library can use one of multiple
implementations of a function; which it is is determined by the program
loading the library, so I'm building a shared library with an undefined
symbol. Obviously, this fails with my usual "-z defs" approach to find
functions that are really missing.

Is there a way to declare that it is okay if a certain symbol is
undefined, while still getting errors about other undefined symbols?

   Simon