Shared libraries

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Problems

9.1

If you look in a /shlib directory on a Unix system with shared libraries, you’ll usually see three or four versions of each library with names like libc_s.2.0.1 and libc_s.3.0.0. Why not just have the most recent one?

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9.2

In a stub library, why is it important to include all of the undefined globals for each routine, even if the undefined global refers to another routine in the shared library?

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9.3

What difference would it make if a stub library were a single large executable with all of the library’s symbols as in COFF or Linux, or an actual library with separate modules?