[Bug sanitizer/57507] gcc 4.8: thread sanitizer: std::thread false(?) positive

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57507

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Would supporting std::shared_ptr solve the problem?  The problem seems to be
due to not understanding that the atomic ops used by shared_ptr are atomic.