Dev:CoreFoundation.framework

CoreFoundation is a cross-platform C-based API that provides reference-counted data structures, IPC facilities, run loops, etc. A subset of it is open-sourced as "CF-Lite".

This framework also provides some crucial Objective-C classes such as NSObject, NSString, NSArray, etc.

For one example of using CoreFoundation version numbers, see Updating extensions for iOS 7.

Parameters for CoreFoundation applications
CoreFoundation recognizes the following special command-line arguments:

Environment variables
Application built with CoreFoundation will recognize the following environment variables