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Boost 1.72.0 build fail with Visual Studio 2019 16.4
by Leo Carreon 24 Dec '19

24 Dec '19

Hi Boost Users, I am building Boost 1.72.0 in 64-bit mode with the flag /std:c++latest using Visual Studio 2019 16.4.2 and I am encountering the following issues: .\boost/asio/async_result.hpp(44): error C2062: type 'bool' unexpected .\boost/asio/async_result.hpp(45): error C2143: syntax error: missing ';' before '{' .\boost/asio/async_result.hpp(45): error C2447: '{': missing function header (old-style formal list?) .\boost/asio/async_result.hpp(56): error C7568: argument list missing after assumed function template 'callable_with' .\boost/asio/async_result.hpp(58): note: see reference to class template instantiation 'boost::asio::detail::is_completion_handler_for<T,R(Args...)>' being compiled .\boost/asio/async_result.hpp(56): error C2059: syntax error: '>' .\boost/asio/async_result.hpp(57): error C3770: 'unknown-type': is not a valid base class .\boost/asio/async_result.hpp(63): error C2062: type 'bool' unexpected .\boost/asio/async_result.hpp(64): error C2065: 'T': undeclared identifier .\boost/asio/async_result.hpp(64): error C2923: 'boost::asio::detail::is_completion_signature': 'T' is not a valid template type argument for parameter 'T' .\boost/asio/async_result.hpp(64): error C2955: 'boost::asio::detail::is_completion_signature': use of class template requires template argument list .\boost/asio/async_result.hpp(34): note: see declaration of 'boost::asio::detail::is_completion_signature' .\boost/asio/async_result.hpp(69): error C2061: syntax error: identifier 'completion_signature' .\boost/asio/async_result.hpp(70): error C2062: type 'bool' unexpected .\boost/asio/async_result.hpp(71): error C2065: 'T': undeclared identifier .\boost/asio/async_result.hpp(71): error C2065: 'Signature': undeclared identifier .\boost/asio/async_result.hpp(71): error C2923: 'boost::asio::detail::is_completion_handler_for': 'T' is not a valid template type argument for parameter 'T' .\boost/asio/async_result.hpp(71): error C2923: 'boost::asio::detail::is_completion_handler_for': 'Signature' is not a valid template type argument for parameter 'Signature' .\boost/asio/async_result.hpp(71): error C2955: 'boost::asio::detail::is_completion_handler_for': use of class template requires template argument list .\boost/asio/async_result.hpp(50): note: see declaration of 'boost::asio::detail::is_completion_handler_for' .\boost/asio/async_result.hpp(105): error C2039: 'completion_signature': is not a member of 'boost::asio' .\boost/asio/async_result.hpp(25): note: see declaration of 'boost::asio' .\boost/asio/async_result.hpp(105): error C2061: syntax error: identifier 'completion_signature' .\boost/asio/async_result.hpp(144): error C2061: syntax error: identifier 'completion_handler_for' .\boost/asio/async_result.hpp(190): note: see reference to class template instantiation 'boost::asio::async_result<CompletionToken>' being compiled .\boost/asio/async_result.hpp(144): error C2988: unrecognizable template declaration/definition .\boost/asio/async_result.hpp(144): error C2059: syntax error: ',' .\boost/asio/async_result.hpp(150): error C2334: unexpected token(s) preceding '{'; skipping apparent function body .\boost/asio/async_result.hpp(194): error C2039: 'completion_signature': is not a member of 'boost::asio' .\boost/asio/async_result.hpp(25): note: see declaration of 'boost::asio' .\boost/asio/async_result.hpp(194): error C2061: syntax error: identifier 'completion_signature' .\boost/asio/async_result.hpp(195): error C2065: 'Signature': undeclared identifier .\boost/asio/async_result.hpp(196): error C2977: 'boost::asio::async_result': too many template arguments .\boost/asio/async_result.hpp(107): note: see declaration of 'boost::asio::async_result' .\boost/asio/async_result.hpp(198): error C2913: explicit specialization; 'boost::asio::async_result' is not a specialization of a class template .\boost/asio/async_result.hpp(205): error C2039: 'completion_signature': is not a member of 'boost::asio' .\boost/asio/async_result.hpp(25): note: see declaration of 'boost::asio' .\boost/asio/async_result.hpp(205): error C2061: syntax error: identifier 'completion_signature' .\boost/asio/async_result.hpp(211): error C2065: 'Signature': undeclared identifier .\boost/asio/async_result.hpp(251): note: see reference to class template instantiation 'boost::asio::async_completion<CompletionToken>' being compiled .\boost/asio/async_result.hpp(250): error C2065: 'Signature': undeclared identifier .\boost/asio/async_result.hpp(250): error C2955: 'boost::asio::async_result': use of class template requires template argument list .\boost/asio/async_result.hpp(195): note: see declaration of 'boost::asio::async_result' .\boost/asio/async_result.hpp(258): error C2955: 'boost::asio::async_result': use of class template requires template argument list .\boost/asio/async_result.hpp(195): note: see declaration of 'boost::asio::async_result' .\boost/asio/async_result.hpp(259): note: see reference to class template instantiation 'boost::asio::detail::async_result_helper<CompletionToken,Signature>' being compiled .\boost/asio/async_result.hpp(288): error C2672: 'boost::asio::detail::async_result_initiate_memfn_helper': no matching overloaded function found .\boost/asio/async_result.hpp(292): note: see reference to class template instantiation 'boost::asio::detail::async_result_has_initiate_memfn<CompletionToken,Signature>' being compiled .\boost/asio/async_result.hpp(290): error C3206: 'boost::asio::detail::async_result_initiate_memfn_helper': invalid template argument for 'T', missing template argument list on class template 'boost::asio::async_result' .\boost/asio/async_result.hpp(281): note: see declaration of 'boost::asio::detail::async_result_initiate_memfn_helper' .\boost/asio/async_result.hpp(290): error C3206: 'boost::asio::detail::async_result_initiate_memfn_helper': invalid template argument for '<unnamed-symbol>', missing template argument list on class template 'boost::asio::async_result' .\boost/asio/async_result.hpp(278): note: see declaration of 'boost::asio::detail::async_result_initiate_memfn_helper' .\boost/asio/async_result.hpp(350): error C2039: 'completion_signature': is not a member of 'boost::asio' .\boost/asio/async_result.hpp(25): note: see declaration of 'boost::asio' .\boost/asio/async_result.hpp(350): error C2061: syntax error: identifier 'completion_signature' .\boost/asio/async_result.hpp(353): error C2065: 'Signature': undeclared identifier .\boost/asio/async_result.hpp(353): error C2923: 'boost::asio::detail::async_result_has_initiate_memfn': 'Signature' is not a valid template type argument for parameter 'Signature' .\boost/asio/async_result.hpp(354): error C2760: syntax error: unexpected token '>', expected 'expression' .\boost/asio/async_result.hpp(359): error C2065: 'Initiation': undeclared identifier .\boost/asio/async_result.hpp(359): error C2065: 'initiation': undeclared identifier .\boost/asio/async_result.hpp(360): error C2065: 'token': undeclared identifier .\boost/asio/async_result.hpp(361): error C2065: 'Args': undeclared identifier .\boost/asio/async_result.hpp(361): warning C4346: 'boost::asio::detail::async_result_has_initiate_memfn::value': dependent name is not a type .\boost/asio/async_result.hpp(361): note: prefix with 'typename' to indicate a type .\boost/asio/async_result.hpp(361): error C2988: unrecognizable template declaration/definition .\boost/asio/async_result.hpp(361): error C2059: syntax error: '...' .\boost/asio/async_result.hpp(362): error C2143: syntax error: missing ';' before '{' .\boost/asio/async_result.hpp(362): error C2447: '{': missing function header (old-style formal list?) .\boost/asio/async_result.hpp(370): error C2039: 'completion_signature': is not a member of 'boost::asio' .\boost/asio/async_result.hpp(25): note: see declaration of 'boost::asio' .\boost/asio/async_result.hpp(370): error C2061: syntax error: identifier 'completion_signature' .\boost/asio/async_result.hpp(373): error C2065: 'Signature': undeclared identifier .\boost/asio/async_result.hpp(373): error C2923: 'boost::asio::detail::async_result_has_initiate_memfn': 'Signature' is not a valid template type argument for parameter 'Signature' .\boost/asio/async_result.hpp(374): error C2065: 'Signature': undeclared identifier .\boost/asio/async_result.hpp(375): error C2065: 'Initiation': undeclared identifier .\boost/asio/async_result.hpp(375): error C2065: 'initiation': undeclared identifier .\boost/asio/async_result.hpp(376): error C2065: 'token': undeclared identifier .\boost/asio/async_result.hpp(377): error C2065: 'Args': undeclared identifier .\boost/asio/async_result.hpp(377): warning C4346: 'boost::asio::detail::async_result_has_initiate_memfn::value': dependent name is not a type .\boost/asio/async_result.hpp(377): note: prefix with 'typename' to indicate a type .\boost/asio/async_result.hpp(377): error C2988: unrecognizable template declaration/definition .\boost/asio/async_result.hpp(377): error C2059: syntax error: '...' .\boost/asio/async_result.hpp(378): error C2143: syntax error: missing ';' before '{' .\boost/asio/async_result.hpp(378): error C2447: '{': missing function header (old-style formal list?) .\boost/asio/async_result.hpp(483): error C7568: argument list missing after assumed function template 'completion_handler_for' .\boost/asio/async_result.hpp(487): note: see reference to class template instantiation 'boost::asio::detail::initiation_archetype<Signature>' being compiled .\boost/asio/async_result.hpp(484): error C2061: syntax error: identifier 'CompletionHandler' .\boost/asio/async_result.hpp(491): error C2061: syntax error: identifier 'completion_signature' .\boost/asio/async_result.hpp(492): error C2062: type 'bool' unexpected .\boost/asio/async_result.hpp(493): error C2143: syntax error: missing ';' before '{' .\boost/asio/async_result.hpp(493): error C2447: '{': missing function header (old-style formal list?) .\boost/asio/post.hpp(56): error C2039: 'completion_token_for': is not a member of 'boost::asio' .\boost/asio/post.hpp(27): note: see declaration of 'boost::asio' .\boost/asio/post.hpp(56): error C2061: syntax error: identifier 'completion_token_for' .\boost/asio/post.hpp(56): error C2988: unrecognizable template declaration/definition .\boost/asio/post.hpp(56): error C2059: syntax error: '>' .\boost/asio/post.hpp(94): error C2039: 'completion_token_for': is not a member of 'boost::asio' .\boost/asio/post.hpp(27): note: see declaration of 'boost::asio' .\boost/asio/post.hpp(94): error C2061: syntax error: identifier 'completion_token_for' .\boost/asio/post.hpp(95): error C2988: unrecognizable template declaration/definition .\boost/asio/post.hpp(95): error C2059: syntax error: '>' .\boost/asio/post.hpp(107): error C2039: 'completion_token_for': is not a member of 'boost::asio' .\boost/asio/post.hpp(27): note: see declaration of 'boost::asio' .\boost/asio/post.hpp(107): error C2061: syntax error: identifier 'completion_token_for' .\boost/asio/post.hpp(108): error C2988: unrecognizable template declaration/definition .\boost/asio/post.hpp(108): error C2059: syntax error: '>' .\boost/asio/impl/post.hpp(81): error C2039: 'completion_token_for': is not a member of 'boost::asio' .\boost/asio/impl/post.hpp(26): note: see declaration of 'boost::asio' .\boost/asio/impl/post.hpp(81): error C2061: syntax error: identifier 'completion_token_for' .\boost/asio/impl/post.hpp(81): error C2988: unrecognizable template declaration/definition .\boost/asio/impl/post.hpp(81): error C2059: syntax error: '>' .\boost/asio/impl/post.hpp(84): error C2143: syntax error: missing ';' before '{' .\boost/asio/impl/post.hpp(84): error C2447: '{': missing function header (old-style formal list?) .\boost/asio/impl/post.hpp(90): error C2039: 'completion_token_for': is not a member of 'boost::asio' .\boost/asio/impl/post.hpp(26): note: see declaration of 'boost::asio' .\boost/asio/impl/post.hpp(90): error C2061: syntax error: identifier 'completion_token_for' .\boost/asio/impl/post.hpp(90): error C2988: unrecognizable template declaration/definition .\boost/asio/impl/post.hpp(90): error C2059: syntax error: '>' .\boost/asio/impl/post.hpp(94): error C2143: syntax error: missing ';' before '{' .\boost/asio/impl/post.hpp(94): error C2447: '{': missing function header (old-style formal list?) .\boost/asio/impl/post.hpp(100): error C2039: 'completion_token_for': is not a member of 'boost::asio' .\boost/asio/impl/post.hpp(26): note: see declaration of 'boost::asio' .\boost/asio/impl/post.hpp(100): error C2061: syntax error: identifier 'completion_token_for' .\boost/asio/impl/post.hpp(100): error C2988: unrecognizable template declaration/definition .\boost/asio/impl/post.hpp(100): error C2059: syntax error: '>' .\boost/asio/impl/post.hpp(105): error C2143: syntax error: missing ';' before '{' .\boost/asio/impl/post.hpp(105): error C2447: '{': missing function header (old-style formal list?) .\boost/asio/detail/buffer_sequence_adapter.hpp(106): error C2955: 'boost::asio::detail::buffer_sequence_adapter_base': use of class template requires template argument list .\boost/asio/detail/buffer_sequence_adapter.hpp(30): note: see declaration of 'boost::asio::detail::buffer_sequence_adapter_base' .\boost/asio/detail/buffer_sequence_adapter.hpp(208): note: see reference to class template instantiation 'boost::asio::detail::buffer_sequence_adapter<Buffer,Buffers>' being compiled .\boost/asio/detail/buffer_sequence_adapter.hpp(116): error C2143: syntax error: missing ';' before '*' .\boost/asio/detail/buffer_sequence_adapter.hpp(116): fatal error C1003: error count exceeds 100; stopping compilation Has anyone else encountered the same issues and how to resolve them? It appears that the macro BOOST_ASIO_CONCEPT is the one causing the issue. This macro seems to have the value “concept bool” which causes the complaint from the compiler. Kind regards, Leo

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[Serialization] Serialize std::valarray of primitives
by Meik 23 Dec '19

23 Dec '19

Hello, I am new to C++ and thus new to Boost. My goal is to serialize a class containing multiple std::valarrays with primitives as content. The code I wrote to achieve that(minimal example to reproduce): #include <iostream> #include <boost/archive/text_oarchive.hpp> class A { valarray<int> member_one; valarray<float> member_two; friend class boost::serialization::access; template<class Archive> void serialize(Archive &ar, const unsigned int version){ ar & member_one; ar & member_two } } int main(int argc, char* argv[]) { boost::archive::text_oarchive oarchive(cout); oarchive << p; return 0; } When compiling this, the following error is given: error: class std::valarray<int> has no member names serialize I'd appreciate if you could let me know how to correctly serialize said std::valarray. Kind regards, Meik S. ||

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[asio] asio::socket -> native handle ->asio::socket not working on windows
by Klebsch, Mario 21 Dec '19

21 Dec '19

Hello, I am using boost asio in a cross platform project. The project consists of two libraries, having a C call API in between. Until now, each of those two libraries uses boost::asio internally. Each of these libraries have their own instance of boost::asio::io_service. I now need to implement a change, that requires to pass a connected socket from one library to the other one via the C call API: This is what I want to do it. * Lib1 calls new method connect() in lib2 * lib2::connect() creates a boost::asio::ip::tcp::socket * lib2::connect() connects to a service * lib2::connect() does some async communication with that service. * when the service is initialized, lib2::connect() shall pass the native handle back to its caller (Lib1). * Lib1 then creates a boost::asio::ip::tcp::socket from the native handle I have learned, that there is no way to destroy a boost::asio::ip::tcp::socket without closing the native handle. So, I have to dup() it. No problem on POSIX systems, on Windows I can use a combination of WSADuplicateSocket () and WSASocket () to achieve the same. Everything works fine on Linux, but on Windows, the parts do not work together :) The individual parts are working find. * I can use the boost::asio::ip::tcp::socket to communicate with the service. * I can use WSADuplicateSocket () and WSASocket () to get a 2nd, native handle to the socket * I can use the 2nd, native handle to communicate to the service, even after destroying the boost::asio::ip::tcp::socket instance. * I also can create a working boost::asio::ip::tcp::socket from a native socket handle, created with socket() and connected to a service with connect(). BUT: If I try to create a boost::asio::ip::tcp::socket on the socket created by the WSADuplicateSocket () and WSASocket () sequence, I get an exception. The call to CreateIoCompletionPort() in win_iocp_io_service.ipp, win_iocp_io_service::register_handle() fails with error 87 (Invalid Parameter). I have no idea, why CreateIoCompletionPort() is failing and how to avoid this. Here is a sample program demonstrating my problem. If BUG is #defined, the code fails with std::exception "assign: Falscher Parameter" (invalid parameter). #ifdef _WIN32 #include <winsock2.h> #include <ws2tcpip.h> #else #include <sys/socket.h> #endif #include <boost/asio.hpp> #define ADDR "127.0.0.1" #define PORT "7" /* echo */ #include <stdio.h> #ifndef _WIN32 inline int WSAGetLastError() { return errno; } #endif int main() { char Request[]="Hello"; char Buffer[256]; int n; try { #ifdef _WIN32 SOCKET s1 = INVALID_SOCKET; #else int s1=-1; #endif #ifdef BUG { printf("The programm does not work with this code on windows :-(\n"); boost::asio::io_service IoService; boost::asio::ip::tcp::resolver Resolver(IoService); boost::asio::ip::tcp::resolver::query Query(ADDR, PORT); boost::asio::ip::tcp::socket s(IoService); s.connect(*Resolver.resolve(Query)); printf("connected\n"); #ifdef _WIN32 WSAPROTOCOL_INFO ProtocolInfo; DWORD MyProcId = GetCurrentProcessId(); int x = WSADuplicateSocket((SOCKET)s.native_handle(), MyProcId, &ProtocolInfo); if (x) throw boost::system::error_code(WSAGetLastError(), boost::system::system_category()); s1 = WSASocket(FROM_PROTOCOL_INFO, FROM_PROTOCOL_INFO, FROM_PROTOCOL_INFO, &ProtocolInfo, 0, WSA_FLAG_OVERLAPPED); #else /* !_WIN32 */ s1=dup(s.native_handle()); #endif /* !_WIN32 */ if (s1<0) throw boost::system::error_code(WSAGetLastError(), boost::system::system_category()); } #else s1 = socket(PF_INET, SOCK_STREAM, 0); if (s1 < 0) throw boost::system::error_code(WSAGetLastError(), boost::system::system_category()); struct sockaddr_in Addr; Addr.sin_family = AF_INET; Addr.sin_port = htons(atoi(PORT)); inet_pton(AF_INET, ADDR, &Addr.sin_addr); if (connect(s1, (struct sockaddr*)&Addr, sizeof(Addr)) < 0) throw boost::system::error_code(WSAGetLastError(), boost::system::system_category()); #endif printf("s1=%d\n", s1); { boost::asio::io_service IoService; boost::asio::ip::tcp::socket s(IoService, boost::asio::ip::tcp::v4(), (boost::asio::ip::tcp::socket::native_handle_type)s1); n = s.write_some(boost::asio::buffer(&Request, sizeof(Request))); printf("write_some() returned %d\n", n); n = s.read_some(boost::asio::buffer(Buffer, sizeof(Buffer))); printf("read_some() returned %d\n", n); } return 0; } catch (boost::system::error_code &ec) { fprintf(stderr, "boost::system::error_code: %s\n", ec.message().c_str()); return -1; } catch (std::exception &e) { fprintf(stderr, "std::exception: %s\n", e.what()); return -1; } } Thanks in advance, Mario -- Mario Klebsch Actia I+ME GmbH Mario.klebsch(a)ime-actia.de<mailto:Mario.klebsch@ime-actia.de> Dresdenstrasse 17/18 Fon: +49 531 38 701 716 38124 Braunschweig Fax: +49 531 38 701 88 German

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contribution to the organization
by anshu khare 18 Dec '19

18 Dec '19

Respected sir/madam Please guide me on how to start contributing to the organization. Thank You Regards Anshu Khare

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Boost public key
by David P. Riedel 16 Dec '19

16 Dec '19

Hi I'm trying to find the boost public pgp key so I can validate the release archive against its signature file. But I can't find where to import the public key from or what it is called. Thanks for any help.

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Contribution to the organisation
by anshu khare 16 Dec '19

16 Dec '19

Respected Sir / Ma'am I know C++. I am new to BOOST. Please guide me on how to get started? Regards Anshu Khare

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Compilation issue
by Xikai Jiang 16 Dec '19

16 Dec '19

Dear developers: I encountered an error when compiling software that uses boost. I'm using boost_1.72.0, and the compiler I used is intel mpiicpc (ICC) 16.0.3 20160415 Below is the error message: [ 1%] Building CXX object src/core/CMakeFiles/EspressoCore.dir/accumulators.cpp.o In file included from /THL7/home/hugq/xikai_jiang/Softwares/boost_1_72_0/build/include/boost/utility.hpp(22), from /THL7/home/hugq/xikai_jiang/Softwares/boost_1_72_0/build/include/boost/range/size.hpp(25), from /THL7/home/hugq/xikai_jiang/Softwares/boost_1_72_0/build/include/boost/range/functions.hpp(20), from /THL7/home/hugq/xikai_jiang/Softwares/boost_1_72_0/build/include/boost/range/iterator_range_core.hpp(38), from /THL7/home/hugq/xikai_jiang/Softwares/boost_1_72_0/build/include/boost/range/iterator_range.hpp(13), from /THL7/home/hugq/xikai_jiang/Softwares/boost_1_72_0/build/include/boost/range/detail/range_return.hpp(14), from /THL7/home/hugq/xikai_jiang/Softwares/boost_1_72_0/build/include/boost/range/algorithm/remove_if.hpp(16), from /THL7/home/hugq/xikai_jiang/Softwares/espresso-4.1.2/src/core/accumulators.cpp(21): /THL7/home/hugq/xikai_jiang/Softwares/boost_1_72_0/build/include/boost/core/noncopyable.hpp(42): error: defaulted default constructor cannot be constexpr because the corresponding implicitly declared default constructor would not be constexpr BOOST_CONSTEXPR noncopyable() = default; ^ compilation aborted for /THL7/home/hugq/xikai_jiang/Softwares/espresso-4.1.2/src/core/accumulators.cpp (code 2) make[2]: *** [src/core/CMakeFiles/EspressoCore.dir/accumulators.cpp.o] Error 2 make[1]: *** [src/core/CMakeFiles/EspressoCore.dir/all] Error 2 make: *** [all] Error 2 Let me know if you need further information to diagnose the issue. Hints to resolve the issue are appreciated. Regards, Xikai

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Boost 1.70 Thread library and Sun Studio Pro 12.4
by mik 12 Dec '19

12 Dec '19

Hi, just to signal an issue that I encounter with the boost (1.70) thread library compiling my library. I got this linking problem: Undefined first referenced symbol in file void boost::detail::set_tss_data(const void*,void(*)(void(*)(void*),void*),void(*)(void*),void*,bool) CMakeFiles/basic.dir/containers/MemoryPool.cpp.o void*boost::detail::get_tss_data(const void*) CMakeFiles/basic.dir/containers/MemoryPool.cpp.o So I investigated and I found that was missing the export keyword for Sun Solaris. I modified the file boost/thread/detail/config.hpp:498 in this way #elif (__GNUC__ == 4 && __GNUC_MINOR__ >= 1) || (__GNUC__ > 4) || (__SUNPRO_CC) and I solved it. I hope this could be useful for someone. Regards, Mirko

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coroutine/asymmetric_coroutine.hpp no member named 'begin' in namespace boost
by Martijn Otto 12 Dec '19

12 Dec '19

After upgrading from boost 1.71 to 1.72 the following simple example now leads to a compilation error: #include <boost/asio/spawn.hpp> int main() { return 0; } The compilation errors point to a missing boost::begin and boost::end functions: /usr/local/include/boost/coroutine/asymmetric_coroutine.hpp:2364:10: error: no member named 'begin' in namespace 'boost'; did you mean simply 'begin'? { return boost::begin( c); } It goes on for a while, but I think the problem is clear. The source of this problem seems that between 1.71 and 1.72 in boost/coroutine/asymmetric_coroutine.hpp the include of boost/range.hpp was removed, which leads to these functions being undefined. To me it looks like a clear bug, but the fact that this include was removed points to some deliberate action. Am I missing something?

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[release] Boost 1.72.0 has been released
by Marshall Clow 12 Dec '19

12 Dec '19

Release 1.72.0 of the Boost C++ Libraries is now available. These open-source libraries work well with the C++ Standard Library, and are usable across a broad spectrum of applications. The Boost license encourages both commercial and non-commercial use. This release contains new libraries and numerous enhancements and bug fixes for existing libraries. For details, including download links, see < http://www.boost.org/users/news/version_1.72.0> You can also download directly from: < https://dl.bintray.com/boostorg/release/1.72.0/> To install this release on your system, see < http://www.boost.org/doc/libs/release/more/getting_started/index.html> Thanks to everyone who participated in this release. Thanks, -- The Boost Release Team Marshall Clow, Michael Caisse

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