Cause for Undefined symbols for architecture i386?

what is the true reason for the "Undefined symbols for architecture i386:" errors that occur?

It appears way too often with various libraries...

Regards Mirza


Sometimes you need to link with frameworks that are included in the iOS sdk (QuartzCore or CoreData for example). When you're trying to use a class or object of that framework, and you haven't linked it, you're getting the undefined symbols error.

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