rainer@rainer10:~/work/cpp_test$ schroot -c steamrt_scout_amd64 -- clang-3.6 -std=gnu++14 -c test.cpp -I boost_1_68_0/
In file included from test.cpp:1:
boost_1_68_0/boost/system/error_code.hpp:226:41: error: constexpr constructor
      never produces a constant expression [-Winvalid-constexpr]
        BOOST_SYSTEM_CONSTEXPR explicit std_category( boost::system::err...
                                        ^
boost_1_68_0/boost/system/error_code.hpp:226:41: note: non-constexpr constructor
      'error_category' cannot be used in a constant expression
/usr/bin/../lib/gcc/x86_64-linux-gnu/4.8/../../../../include/c++/4.8/system_error:69:5: note: 
      declared here
    error_category() noexcept;
    ^
1 error generated.