Hi Tom, Since Derived does not have a non-inlined virtual function, and since it's virtual if it is called through a Base pointer or reference the compiler needs to link to the actual function. You probably need this switch... -fkeep-inline-functions ...but my recommended solution is: don't inline your virtual functions. My general guideline is: never inline anything until you've done profiling to show that it should be inlined for a needed performance gain. Also, I strongly recommend you put in a virtual destructor in your Base class. Did you know that the g++ compiler generates the virtual function table in the translation unit that has the first non-inlined virtual function defined? In the case where you don't have that, I suppose it emits a weak linked or once-only linked virtual function table in all translation units. HTH, --Eljay
