I create a project with ARC support using the Xcode project wizard. Compared with a program without ARC support, I did not notice any differences. Is there any hint that can tell me if my program supports ARC?

I am using XCode 4.2.1 Build 4D502
['https://Stackoverflow.com/questions/11380533', 'https://Stackoverflow.com', 'https://Stackoverflow.com/users/705414/']
Or to test just once, add this in your code:

```
NSString* dummy = [[[NSString alloc] init] autorelease];

```

This should raise an error if you are using ARC. If it does, ARC is enabled, all is fine and you can remove it again.
add "-fno-objc-arc" compiler flags for all the .m files in build phases