C++ and multithreading

[grayg1]

I'm using code::blocks IDE and tried flagging c++11 and c++0x in the compiler, but it doesn't work. This seems to be a common problem and rather than mess about forever trying to get it to work, I started looking at libs to use instead.
So... is there a particular lib I should be looking at? Has to be free and work cross-platform.

I was looking at boost, am I on the right track?

[aidanjt]

Yeah, boost is probably the best option if you want to build everywhere 'regardless' of compiler.