Here is the LLVM support page, which is required for Lion and above : http://clang.llvm.org/cxx_status.html  For pre-Lion, gcc4.5 is used.

What compile is used on Windows?

On Mon, Apr 30, 2012 at 2:11 AM, Fabien Chéreau <fabien.chereau@googlemail.com> wrote:
Try to avoid it for the moment, I don't think all compiler on win/mac
supports it right now.
Fab

On Mon, Apr 30, 2012 at 02:48, Reaves, Timothy
<treaves@silverfieldstech.com> wrote:
> I know of know reason this should not be permissible.  Make sure the cmake
> file is update.
>
> On Sun, Apr 29, 2012 at 6:36 PM, Anton Samoylov <toshaevil@gmail.com> wrote:
>>
>> Can I use C++11 ( http://en.wikipedia.org/wiki/C%2B%2B11 ) syntax in
>> Stellarium? GCC compiler supports C++11 since version 4.3 (current is 4.7),
>> but it needs additional command-line parameter ( -std=c++0x)
>>
>> --
>> Best regards,
>> Anton Samoylov
>>
>>
>>
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