Xcode 4.6

For the compiler:

• Compilation warnings are added which assist in finding bugs when using ARC and weak references.

• otool is enhanced to support disassembly of Intel AVX instructions.

• The LLVM compiler now supports C++11 “user defined literals” and “unrestricted unions” features.

• The static analyzer has enhanced cross-function analysis for C++ and Objective-C methods. With this enhancement, the static analyzer can now find deeper bugs that cross method calls in Objective-C and C++ code. This new capability extends the cross-function analysis for C functions that was introduced in Xcode 4.5.

For the debugger:

• LLDB has been enhanced to read metadata from the Objective-C runtime. This enhancement greatly reduces the need to cast arguments and the results of message sends, and makes properties more often usable (particularly from system classes).

• LLDB has improved support for stepping over inlined functions. This improved support is particularly useful for libc++ and always_inline functions like NSMakeRange.

• LLDB now prints function argument information in backtraces by default.

• LLDB now supports “thread return,” temporary breakpoints, and a variety of aliases to add common shortcuts from GDB.

• The elements of NSArray and NSDictionary objects can now be inspected in the Xcode debugger.

Xcode 4.6.1

Xcode 4.6.1 is a maintenance release responding to reported developer issues and Apple qualification testing. Major highlights of this release include:

• Xcode 4.6.1 provides an update to the included OS X SDK, supporting new OS X v10.8.3 APIs.

• ARC compatibility has been ensured for projects targeting OS X 10.6

Xcode 4.6.2

• The Xcode 4.6.2 release is a maintenance release responding to reported developer issues and Apple qualification testing.

Xcode 4.6.3

• The Xcode 4.6.3 release fixes an issue where debugging in the iOS Simulator could hang on OS X 10.8.4.

Additional improvements to Xcode robustness and reliability have been incorporated. See Xcode Release Notes for more information.