What versions of gcc, llvm and clang are in XCode 4?

Question

For some reason, this information is difficult to come by.

We'd like to start using some of the C++0x features that are available in most compilers. But we are held back a bit by XCode 3, since it only provides GCC 4.2 and LLVM 1.5. All of the other platforms we need to support either already have compilers with preliminary support for C++0x features, or they have a relatively painless method of installing/upgrading the compiler.

An XCode 4 preview is available, but only to those in the Mac or iOS Developer Program.

Answer 1

Xcode 4 GM

gcc version 4.2.1 (Apple Inc. build 5666) (dot 3)
Apple clang version 2.0 (tags/Apple/clang-134) (based on LLVM 2.9svn)

Answer 2

You can use a later gcc version in Xcode 3. I did it once, however I don't fully remember how; I used a gcc I built myself from the svn trunk. There is post here which might help you.

Answer 3

You can also build and run later versions of clang within Xcode. See for example:

http://shapeof.com/archives/2010/01/using_the_latest_llvm_with_xcode.html