Features of Xcode 4.6.1

- SDKs for OS X 10.8 Mountain Lion and iOS 6 SDK.

- Support for iPad mini and iPad with Retina display (4th generation). - Updates to the Apple LLVM compiler and Objective-C language:

- New compiler warnings that aid in finding subtle behavioral bugs when using ARC and weak references.

- Support for the C++11 features "user defined literals" and "unrestricted unions".

- Advanced optimization to merge disjoint stack objects and reduce the size of allocated stack memory.

- The Typed-Based Alias Analysis (TBAA) code generation optimization is enabled by default. Previously this behavior was explicitly enabled by passing - fstrict-aliasing to the compiler. It can be disabled by passing -fno-strict-aliasing, or using the matching Xcode build setting.

- Support for Microsoft-style inline assembly for i386 and x86_64.

- otool has been enhanced to support disassembly of Intel AVX instructions.

- otool can now precisely decode all instructions and skip over data entries in text segments.

- The static analyzer now supports deeper cross function analysis of C++ and Objective-C code.

- Updates to the LLDB debugger:

- Ability to read metadata from the Objective-C runtime.

- Improved support for stepping over inlined functions

- Prints function argument information in backtraces by default.

- Supports “thread return,” temporary breakpoints, and a variety of aliases to add common shortcuts from GDB.

- Elements of NSArray and NSDictionary objects can now be inspected in the Xcode debugger.

- Many bug fixes and stability improvements.