How do I find out which functions of a shared object are used by a program or an other library?

Question

How do I find out which functions of a shared object are used by a program or an other library? In this specific case, I would like to see which functions in /lib/libgcc1_s.so.1

Answer 1

Maybe the nm tool can help you since it displays the symbols' names contained in a binary file.
It is as simple as ABC to use:

nm my_binary