[boost] Define to test for deprecated std::auto_ptr

I have some tests which are throwing up std::auto_ptr as deprecated with C++11. Is there a define that can be tested for in user code so that I can switch to std::unique_ptr when it is available? Something like this: #ifdef BOOST_NO_CXX11_UNIQUEPTR // use auto_ptr #else // use unique_ptr #endif Is there a general flag for C++11 or C++14 or is it all done on particular features? Thanks John