In file included from ../../deps/boost/include/boost/tuple/tuple.hpp:33:0,
                 from ../../deps/boost/include/boost/thread/detail/async_func.hpp:37,
                 from ../../deps/boost/include/boost/thread/future.hpp:22,
                 from t.cpp:2:
../../deps/boost/include/boost/tuple/detail/tuple_basic.hpp: In function ‘typename boost::tuples::access_traits<typename boost::tuples::element<N, boost::tuples::cons<HT, TT> >::type>::const_type boost::tuples::get(const boost::tuples::cons<HT, TT>&)’:
../../deps/boost/include/boost/tuple/detail/tuple_basic.hpp:228:45: warning: typedef ‘cons_element’ locally defined but not used [-Wunused-local-typedefs]
   typedef BOOST_DEDUCED_TYPENAME impl::type cons_element;
                                             ^
In file included from ../../deps/boost/include/boost/bind/bind.hpp:29:0,
                 from ../../deps/boost/include/boost/bind.hpp:22,
                 from ../../deps/boost/include/boost/thread/future.hpp:41,
                 from t.cpp:2:
../../deps/boost/include/boost/bind/arg.hpp: In constructor ‘boost::arg<I>::arg(const T&)’:
../../deps/boost/include/boost/bind/arg.hpp:37:22: warning: typedef ‘T_must_be_placeholder’ locally defined but not used [-Wunused-local-typedefs]
         typedef char T_must_be_placeholder[ I == is_placeholder<T>::value? 1: -1 ];
                      ^
t.cpp: In function ‘int main()’:
t.cpp:12:78: error: expected primary-expression before ‘f’
         const boost::unique_future<foo>& fut = boost::make_ready_future( foo f(42) );
                                                                              ^
t.cpp:12:42: warning: unused variable ‘fut’ [-Wunused-variable]
         const boost::unique_future<foo>& fut = boost::make_ready_future( foo f(42) );
                                          ^
In file included from ../../deps/boost/include/boost/system/system_error.hpp:14:0,
                 from ../../deps/boost/include/boost/thread/exceptions.hpp:22,
                 from ../../deps/boost/include/boost/thread/pthread/mutex.hpp:12,
                 from ../../deps/boost/include/boost/thread/mutex.hpp:16,
                 from ../../deps/boost/include/boost/thread/future.hpp:24,
                 from t.cpp:2:
../../deps/boost/include/boost/system/error_code.hpp: At global scope:
../../deps/boost/include/boost/system/error_code.hpp:222:36: warning: ‘boost::system::posix_category’ defined but not used [-Wunused-variable]
     static const error_category &  posix_category = generic_category();
                                    ^
../../deps/boost/include/boost/system/error_code.hpp:223:36: warning: ‘boost::system::errno_ecat’ defined but not used [-Wunused-variable]
     static const error_category &  errno_ecat     = generic_category();
                                    ^
../../deps/boost/include/boost/system/error_code.hpp:224:36: warning: ‘boost::system::native_ecat’ defined but not used [-Wunused-variable]
     static const error_category &  native_ecat    = system_category();