id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
8371	C++11 once_flag enabled when constexpr is not available	Andrey Semashev	viboes	Boost.Thread should disable C++11 interface for call_once (and once_flag in particular) when the compiler does not support constexpr. Otherwise once_flag construction is not thread safe. This has been brought up in [http://news.gmane.org/find-root.php?group=gmane.comp.lib.boost.devel&article=239023 this] topic.	Bugs	closed	Boost 1.54.0	thread	Boost 1.53.0	Problem	fixed