I've added an external framework to my project. It builds on simulator(s) just fine (iPhone simulator 3.5 inch, iPhone simulator 4 inch, iPhone simulator 4 inch(64-bit)). I've tried to build it for my iPhone 5s and it gives me 'Lexical or preprocessor Issue LibName/HeaderName.h file not found.'.
I've successfully built the project without the framework previously - which makes me think it's not about the project settings. And I've also used this framework in other projects - which makes me think it's not about the framework. Any thoughts?