undefined non-weak symbols

[Jack Howarth]

Jakub,
   I recall you mentioned that when prelink reports a shared library
has  undefined non-weak symbols in it that while the file is prelinkable
it is may not be done optimally. I was wondering under what 
circumstances such undefined non-weak symbols get introduced into
a shared library and if there is any best practices we can adopt to
avoid them as well as eliminate the current ones. Thanks in advance
for any information on this.
                                  Jack