clang++ 3.2链接器找不到c++ stdlib

I've installed clang 3.2 on my Ubuntu 13.04 machine, and have compiled and built libc++, and everything is in place. However, when I try to link my (really simple) code, the linker reports that references to std::cout etc. are undefined.I've installed clang 3.2 on my Ubuntu 13.04 mac