Re: [Boost-users] 1.57.0 beta 1 release candidates available for testing

John Maddock writes:

...

Visual C++ 14 CTP 4 without BOOST_MSVC_ENABLE_2014_JUN_CTP: all libraries built successfully (but some are not usable, mostly because of missing noexcept)

Is this a Config issue or what exactly?

One issue was that MSVC14's std::atomic<T> requires T to have a noexcept default constructor. Without BOOST_MSVC_ENABLE_2014_JUN_CTP, this breaks Boost.Lockfree, for example.