I'm experimenting with C++11 using CodeLite 5.1 and gcc 4.7.3
The support for C+11 is experimental and has to be turned on with a compiler switch. This page describes the alternatives.
I used -std=c++11
which I set in the Project Settings dialog. Common Settings / Compiler / C++ Compiler Options, like this:
I also made the compiler switch available to all build configurations by adding to the Build Settings dialog which is on the Settings option of the main menu: