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::tup
les::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:12:42: warning: unused variable ‘fut’ [-Wunused-variable]
         const boost::unique_future<foo>& fut = boost::make_ready_future( foo(42) );
                                          ^
In file included from ../../deps/boost/include/boost/thread/future.hpp:21:0,
                 from t.cpp:2:
../../deps/boost/include/boost/thread/future.hpp: In instantiation of ‘boost::unique_future<typename boost::decay<T>::type> boost::
make_ready_future(const T&) [with T = foo; typename boost::decay<T>::type = foo]’:
t.cpp:12:82:   required from here
../../deps/boost/include/boost/thread/detail/move.hpp:183:54: error: no matching function for call to ‘boost::unique_future<foo>::u
nique_future(boost::unique_future<foo>)’
 #define BOOST_THREAD_MAKE_RV_REF(RVALUE) RVALUE.move()
                                                      ^
../../deps/boost/include/boost/thread/future.hpp:3635:12: note: in expansion of macro ‘BOOST_THREAD_MAKE_RV_REF’
     return BOOST_THREAD_MAKE_RV_REF(p.get_future());
            ^
../../deps/boost/include/boost/thread/detail/move.hpp:183:54: note: candidates are:
 #define BOOST_THREAD_MAKE_RV_REF(RVALUE) RVALUE.move()
                                                      ^
../../deps/boost/include/boost/thread/future.hpp:3635:12: note: in expansion of macro ‘BOOST_THREAD_MAKE_RV_REF’
     return BOOST_THREAD_MAKE_RV_REF(p.get_future());
            ^
In file included from t.cpp:2:0:
../../deps/boost/include/boost/thread/future.hpp:65:29: note: boost::unique_future<R>::unique_future(boost::detail::thread_move_t<b
oost::unique_future<boost::unique_future<R> > >) [with R = foo]
 #define BOOST_THREAD_FUTURE unique_future
                             ^
../../deps/boost/include/boost/thread/future.hpp:1515:16: note: in expansion of macro ‘BOOST_THREAD_FUTURE’
         inline BOOST_THREAD_FUTURE(BOOST_THREAD_RV_REF(BOOST_THREAD_FUTURE<BOOST_THREAD_FUTURE<R> >) other); // EXTENSION
                ^
../../deps/boost/include/boost/thread/future.hpp:65:29: note:   no known conversion for argument 1 from ‘boost::unique_future<foo>’ to ‘boost::detail::thread_move_t<boost::unique_future<boost::unique_future<foo> > >’
 #define BOOST_THREAD_FUTURE unique_future
                             ^
../../deps/boost/include/boost/thread/future.hpp:1515:16: note: in expansion of macro ‘BOOST_THREAD_FUTURE’
         inline BOOST_THREAD_FUTURE(BOOST_THREAD_RV_REF(BOOST_THREAD_FUTURE<BOOST_THREAD_FUTURE<R> >) other); // EXTENSION
                ^
../../deps/boost/include/boost/thread/future.hpp:65:29: note: boost::unique_future<R>::unique_future(boost::detail::thread_move_t<b
oost::unique_future<R> >) [with R = foo]
 #define BOOST_THREAD_FUTURE unique_future
                             ^
../../deps/boost/include/boost/thread/future.hpp:1511:9: note: in expansion of macro ‘BOOST_THREAD_FUTURE’
         BOOST_THREAD_FUTURE(BOOST_THREAD_RV_REF(BOOST_THREAD_FUTURE) other) BOOST_NOEXCEPT:
         ^
../../deps/boost/include/boost/thread/future.hpp:65:29: note:   no known conversion for argument 1 from ‘boost::unique_future<foo>’
 to ‘boost::detail::thread_move_t<boost::unique_future<foo> >’
 #define BOOST_THREAD_FUTURE unique_future
                             ^
../../deps/boost/include/boost/thread/future.hpp:1511:9: note: in expansion of macro ‘BOOST_THREAD_FUTURE’
         BOOST_THREAD_FUTURE(BOOST_THREAD_RV_REF(BOOST_THREAD_FUTURE) other) BOOST_NOEXCEPT:
         ^
../../deps/boost/include/boost/thread/future.hpp:65:29: note: boost::unique_future<R>::unique_future() [with R = foo]
 #define BOOST_THREAD_FUTURE unique_future
                             ^
../../deps/boost/include/boost/thread/future.hpp:1507:25: note: in expansion of macro ‘BOOST_THREAD_FUTURE’
         BOOST_CONSTEXPR BOOST_THREAD_FUTURE() {}
                         ^
../../deps/boost/include/boost/thread/future.hpp:65:29: note:   candidate expects 0 arguments, 1 provided
 #define BOOST_THREAD_FUTURE unique_future
                             ^
../../deps/boost/include/boost/thread/future.hpp:1507:25: note: in expansion of macro ‘BOOST_THREAD_FUTURE’
         BOOST_CONSTEXPR BOOST_THREAD_FUTURE() {}
                         ^
In file included from ../../deps/boost/include/boost/thread/detail/move.hpp:19:0,
                 from ../../deps/boost/include/boost/thread/future.hpp:21,
                 from t.cpp:2:
../../deps/boost/include/boost/thread/future.hpp:65:29: note: boost::unique_future<R>::unique_future(boost::unique_future<R>&) [wit
h R = foo]
 #define BOOST_THREAD_FUTURE unique_future
                             ^
../../deps/boost/include/boost/thread/detail/delete.hpp:39:7: note: in definition of macro ‘BOOST_THREAD_DELETE_COPY_CTOR’
       CLASS(CLASS&); \
       ^
../../deps/boost/include/boost/thread/detail/move.hpp:231:3: note: in expansion of macro ‘BOOST_THREAD_NO_COPYABLE’
   BOOST_THREAD_NO_COPYABLE(TYPE) \
   ^
../../deps/boost/include/boost/thread/future.hpp:1503:9: note: in expansion of macro ‘BOOST_THREAD_MOVABLE_ONLY’
         BOOST_THREAD_MOVABLE_ONLY(BOOST_THREAD_FUTURE)
         ^
../../deps/boost/include/boost/thread/future.hpp:1503:35: note: in expansion of macro ‘BOOST_THREAD_FUTURE’
         BOOST_THREAD_MOVABLE_ONLY(BOOST_THREAD_FUTURE)
                                   ^
../../deps/boost/include/boost/thread/future.hpp:65:29: note:   no known conversion for argument 1 from ‘boost::unique_future<foo>’
 to ‘boost::unique_future<foo>&’
 #define BOOST_THREAD_FUTURE unique_future
                             ^
../../deps/boost/include/boost/thread/detail/delete.hpp:39:7: note: in definition of macro ‘BOOST_THREAD_DELETE_COPY_CTOR’
       CLASS(CLASS&); \
       ^
../../deps/boost/include/boost/thread/detail/move.hpp:231:3: note: in expansion of macro ‘BOOST_THREAD_NO_COPYABLE’
   BOOST_THREAD_NO_COPYABLE(TYPE) \
   ^
../../deps/boost/include/boost/thread/future.hpp:1503:9: note: in expansion of macro ‘BOOST_THREAD_MOVABLE_ONLY’
         BOOST_THREAD_MOVABLE_ONLY(BOOST_THREAD_FUTURE)
         ^
../../deps/boost/include/boost/thread/future.hpp:1503:35: note: in expansion of macro ‘BOOST_THREAD_FUTURE’
         BOOST_THREAD_MOVABLE_ONLY(BOOST_THREAD_FUTURE)
                                   ^
In file included from t.cpp:2:0:
../../deps/boost/include/boost/thread/future.hpp:65:29: note: boost::unique_future<R>::unique_future(boost::unique_future<R>::futur
e_ptr) [with R = foo; boost::unique_future<R>::future_ptr = boost::shared_ptr<boost::detail::shared_state<foo> >]
 #define BOOST_THREAD_FUTURE unique_future
                             ^
../../deps/boost/include/boost/thread/future.hpp:1497:9: note: in expansion of macro ‘BOOST_THREAD_FUTURE’
         BOOST_THREAD_FUTURE(future_ptr a_future):
         ^
../../deps/boost/include/boost/thread/future.hpp:65:29: note:   no known conversion for argument 1 from ‘boost::unique_future<foo>’
 to ‘boost::unique_future<foo>::future_ptr {aka boost::shared_ptr<boost::detail::shared_state<foo> >}’
 #define BOOST_THREAD_FUTURE unique_future
                             ^
../../deps/boost/include/boost/thread/future.hpp:1497:9: note: in expansion of macro ‘BOOST_THREAD_FUTURE’
         BOOST_THREAD_FUTURE(future_ptr a_future):
         ^
In file included from t.cpp:2:0:
../../deps/boost/include/boost/thread/future.hpp: In function ‘boost::unique_future<typename boost::decay<T>::type> boost::make_rea
dy_future(const T&) [with T = foo; typename boost::decay<T>::type = foo]’:
../../deps/boost/include/boost/thread/future.hpp:3636:3: warning: control reaches end of non-void function [-Wreturn-type]
   }
   ^
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 [-Wunuse
d-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-va
riable]
     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-v
ariable]
     static const error_category &  native_ecat    = system_category();