https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66146
--- Comment #42 from Rich Felker <bugdal at aerifal dot cx> --- I'm confused why this is an ABI boundary at all. Was the old implementation of std::call_once being inlined into callers? Otherwise all code operating on the same once object should be using a common implementation, either the old one or the new one, from libstdc++.
