CocoaPods/Specs — pull request #9626 by febeling (2014-03-24 10:00:23+00:00)
Title: ZXing without recompiles

ZXing was recompiling on any change in the dependent project. This is very time consuming, since it contains 500+ source files.

There was an issue for this problem in the main CocoaPods repo (CocoaPods/CocoaPods#1523), but it was closed. This change solves the problem for me.