[Bug libstdc++/42734] trivial use of std::thread fails with "pure virtual method called"

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42734

--- Comment #31 from Jonathan Wakely <redi at gcc dot gnu.org> 2010-10-15 
19:27:37 UTC ---
ah, I see ... IIRC execute_native_thread_method uses shared_ptr which uses
atomic builtins which are missing on i386

so yes, -march=i386 changes the ABI, you need to build libstdc++ with that
-march switch