On Nov 5, 2011, at 1:18 PM, Wade Tregaskis wrote: >>> Note that (so far as Mac OS X is concerned - I don't know about iOS) this >>> only happens with the 64-bit runtime on Intel, on Lion. Previous runtimes >>> don't even have this optimisation, and there's somewhat surprisingly no >>> 32-bit implementation of the critical callerAcceptsFastAutorelease(). >> >> That’s true, in the sense that ARC itself is not supported on the old >> runtime at all, let alone optimizations related to it. > > "ARC is supported in Xcode 4.2 for Mac OS X v10.6 and v10.7 (64-bit > applications) and for iOS 4 and iOS 5. Weak references are not supported in > Mac OS X v10.6 and iOS 4." > > http://developer.apple.com/library/ios/#releasenotes/ObjectiveC/RN-TransitioningToARC/_index.html
Right. Notice the (64-bit applications) qualifier. If you try to build for 32-bit, it’ll be the old runtime, and the compiler will give you an error if you have ARC turned on. Charles_______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
