[Bug libstdc++/66146] call_once not C++11-compliant on ppc64le

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66146

--- Comment #34 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Untested sketch of a solution for Solaris and BSDs:
https://gcc.gnu.org/pipermail/gcc-patches/2020-November/557928.html