[Bug libstdc++/58104] std::call_once appears to fail on standard code

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58104

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Works for me.

Are you using the -pthread flag?

You haven't actually said what fails, what fails to execute?