Hi, The current implementation of boost::make_unique_locks needs a std::tuple with C++11 move semantics.* *MSCV 10 provides <tuple> and rvalue references so that BOOST_NO_CXX11_HDR_TUPLE and BOOST_NO_CXX11_RVALUE_REFERENCES are not defined. However I suspect that the implementation provided by <tuple> with this version is the one corresponding to TR1 and doesn't provide move semantics as the message in http://tinyurl.com/atjdoh3 could let think. Could someone confirm my suspicion?* *Is there a way to request MSVC 10 to not import TR1 files? Should BOOST_NO_CXX11_HDR_TUPLE be defined for MSVC 10 as it doesn't implements the c++11 semantics while BOOST_NO_HDR_TUPLE could be undefined? * *Best, Vicente ** Test output: id - thread - make_unique_locks__mutex_p / msvc-10.0 Rev 82343 / Thu, 3 Jan 2013 23:15:13 +0000 *Report Time: *Sat, 5 Jan 2013 12:53:31 +0000 Compile [2013-01-04 08:34:35 UTC]: fail call "C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\vcvarsall.bat" x86 >nul cl /Zm800 -nologo @"c:\boost\regression\trunk\results\boost\bin.v2\libs\thread\test\make_unique_locks__mutex_p.test\msvc-10.0\debug\threading-multi\sync\mutual_exclusion\locks\unique_lock\cons\make_unique_locks_mutex_pass.obj.rsp" make_unique_locks_mutex_pass.cpp c:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\INCLUDE\tuple(79) : error C2558: class 'boost::unique_lock<Mutex>' : no copy constructor available or copy constructor is declared 'explicit' with [ Mutex=boost::mutex ] c:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\INCLUDE\tuple(77) : while compiling class template member function 'std::tr1::_Cons_node<_Car,_Cdr>::_Cons_node(const std::tr1::_Cons_node<_Car,_Cdr> &)' with [ _Car=boost::unique_lock<boost::mutex>, _Cdr=std::tr1::_Cons_node<boost::unique_lock<boost::mutex>,std::tr1::_Cons_node<boost::unique_lock<boost::mutex>,std::tr1::_Tuple_type<std::tr1::_Nil,std::tr1::_Nil,std::tr1::_Nil,std::tr1::_Nil,std::tr1::_Nil,std::tr1::_Nil,std::tr1::_Nil,std::tr1::_Nil,std::tr1::_Nil,std::tr1::_Nil>::_Type>> ] c:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\INCLUDE\tuple(479) : see reference to class template instantiation 'std::tr1::_Cons_node<_Car,_Cdr>' being compiled with [ _Car=boost::unique_lock<boost::mutex>, _Cdr=std::tr1::_Cons_node<boost::unique_lock<boost::mutex>,std::tr1::_Cons_node<boost::unique_lock<boost::mutex>,std::tr1::_Tuple_type<std::tr1::_Nil,std::tr1::_Nil,std::tr1::_Nil,std::tr1::_Nil,std::tr1::_Nil,std::tr1::_Nil,std::tr1::_Nil,std::tr1::_Nil,std::tr1::_Nil,std::tr1::_Nil>::_Type>> ] ..\libs\thread\test\sync\mutual_exclusion\locks\unique_lock\cons\make_unique_locks_mutex_pass.cpp(41) : see reference to class template instantiation 'std::tr1::tuple<_Arg0,_Arg1,_Arg2,_Arg3,_Arg4,_Arg5,_Arg6,_Arg7,_Arg8,_Arg9>' being compiled with [ _Arg0=boost::unique_lock<boost::mutex>, _Arg1=boost::unique_lock<boost::mutex>, _Arg2=boost::unique_lock<boost::mutex>, _Arg3=std::tr1::_Nil, _Arg4=std::tr1::_Nil, _Arg5=std::tr1::_Nil, _Arg6=std::tr1::_Nil, _Arg7=std::tr1::_Nil, _Arg8=std::tr1::_Nil, _Arg9=std::tr1::_Nil * *