Re: Keeping things upto date

[Eliya]

The author of those perl applications thinks that some system library has been changed, probably related to ssl.

I'm not aware of any tool that would automagically rebuild/update just the modules required, resolve any system library version incompatibilities etc.

There are a few modules (like Module::ScanDeps) that might help with finding dependencies of a particular application, but they typically don't work too well with respect to secondary dependencies on system libraries (which - from what you're saying - appears to be your problem here).

So I would start by taking a closer look at the error message. It will most likely tell you what failed loading — at least the first module.  (Even if the applications broke more subtly, the exact error behavior will most likely still provide useful hints.)

Then rebuild/reinstall that module the same way it was installed originally — you mentioned cpan (as opposed to the distro's package manager), so I figure that's how the modules were installed.  Then rinse and repeat until you get no further module loading errors.