xcode4.2 - How to enable/ disable "Automatic Reference Counting"?

Question

Using Xcode 4.2, how can one enable/disable "Automatic Reference Counting"?

ANSWERED Under Build Settings, flip "yes" and "no" depending whether you want ARC enabled.

Answer 1

Globally:

Go to "Build Settings", look for "Apple LLVM compiler 3.0 - Language". Set the field "Objective-C Automatic Reference Counting" to "No".

For individual files:

Go to "Build Phases", select the file, double-click the "Compiler Flags" column and put "-fno-objc-arc" in it.