[Bug c++/53899] [C++0x] undefined reference to std::atomic

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53899

--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-07-09 
16:17:04 UTC ---
See Bug 53901

I think GCC is correct about that too, the tagged_ptr class template should
declare its default constructor and destructor to be noexcept in C++11 mode.