https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65255
--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> --- It's supported fine, but you need to compile your code that uses std::thread so it is compatible with the libstdc++.so library you link to. If libstdc++ is compiled to use atomic operations in shared_ptr then you need to compile your code so it also uses atomics. If libstdc++ is compiled to use mutexes in shared_ptr then you need to compile your code the same way.
