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[DLL] BOOST_DLL_ALIAS not working on MinGW-w64
by David Demelier 09 Nov '18

09 Nov '18

Hello, I'm using boost 1.68 on MinGW-w64 (Windows 10). I'm trying a simple plugin that works fine under Linux and FreeBSD However, on Windows boost::dll::import_alias triggers an exception: terminate called after throwing an instance of 'boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<boost::system::system_error> >' what(): boost::dll::shared_library::get() failed: The specified procedure could not be found This is the plugin (plugin.cpp) #include <iostream> #include <boost/dll.hpp> namespace custom { void my_function() { puts("CALLED"); } } // !custom BOOST_DLL_ALIAS(custom::my_function, my_function) I compile using: g++ -std=c++17 -shared -o plugin.dll plugin.cpp -lboost_system-mt And the simple main.cpp file: #include <boost/dll.hpp> int main() { using my_function = void (); auto f = boost::dll::import_alias<my_function>("./plugin.dll", "my_function"); } What's strange, nm does not report any kind of unmangled symbols related to "my_function": $ nm plugin.dll | grep my_function 0000000067e81422 t _GLOBAL__sub_I__ZN6custom11my_functionEv 0000000067e813b0 T _ZN6custom11my_functionEv It should contains something starting with boostdll_ isn't it? What's happening there? Do I miss something? -- David

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[Spirit] Qi lexeme only taking the first word
by Michael Powell 08 Nov '18

08 Nov '18

Hello, I've got a couple of rules that are perplexing to me. First, rule<It, std::string(), St> id %= lexeme[qi::alpha >> *char_("A-Za-z0-9_")]; In and of itself, id is working fine. Then I've got a "full id": rule<It, full_id_t(), St> full_id %= id >> *(char_('.') >> id); Where: struct full_id_t { std::string val; }; full_id_t::val is quite intentional for reasons elsewhere in the grammar. The perplexity comes in, it seems lexeme is only shaving off the first word as the val. For instance, parsing "two.oranges.red.test", I receive back "two" in the AST. Perhaps I should defer specifying the lexeme part of id until later? Thoughts? Suggestions? Thank you! Best regards, Michael Powell

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Build/use Boost without ICU
by braden 08 Nov '18

08 Nov '18

How does one build (and use) Boost without ICU when ICU is installed (i.e., visible to b2)? I am am bootstrapping with: ...which shows: Seems reasonable so far. Building happens with: ...which shows: In spite of passing "--disable-icu -sboost.locale.icu=off" to b2, I still see Boost.Locale getting built with -DBOOST_LOCALE_WITH_ICU=1; e.g.: What's the correct way to do this? ----- Braden McDaniel braden(a)endoframe.com -- Sent from: http://boost.2283326.n4.nabble.com/Boost-Users-f2553780.html

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Newby help with Boost::Log
by Davies, John 08 Nov '18

08 Nov '18

I'm using Boost Log to capture all keypresses in my embedded device. I want to be able to store at most 3 files of a certain size and rotate them. That's working. My problem is a scenario like this: The device is inserting data into Log_009.log which is in the base folder. In the log folder are Log_006.log, Log_007.log, and Log_008.log. The program stops and restarts. This may be due to some keypress that was logged in Log_009.log. When it restarts, it clears out Log_009.log and starts it over - losing the last logged keypresses Ideally, I'd like Boost Log to just keep appending to Log_009.log, but my reading online says that this isn't possible. My second favorite solution would be that Log_009 gets rotated and Log_010.log is started. Anything so I don't lose data. Here is my configuration: logging::add_common_attributes(); logging::add_file_log ( keywords::file_name = "KeyLog_%3N.log", keywords::target = "./Logs", keywords::rotation_size = 500, // 10 * 1024 * 1024, keywords::format = "[%TimeStamp%]: %Message%", keywords::auto_flush = true, keywords::min_free_space = 30 * 1024 * 1024, boost::log::keywords::max_size = 20 * 1024, keywords::enable_final_rotation = true, keywords::scan_method = sinks::file::scan_matching, keywords::max_files = 3 ); Can you see what I'm missing? If a program exits via a crash, does final rotation occur? Maybe I need something like enable_initial_rotation. Thanks for the help, John ________________________________ The information contained in this message may be confidential and legally protected under applicable law. The message is intended solely for the addressee(s). If you are not the intended recipient, you are hereby notified that any use, forwarding, dissemination, or reproduction of this message is strictly prohibited and may be unlawful. If you are not the intended recipient, please contact the sender by return e-mail and destroy all copies of the original message.

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Deadline for 1.69.0 beta extended
by Marshall Clow 07 Nov '18

07 Nov '18

The deadline for closing the master branch for the 1.69.0 beta has been extended until Friday, November 9th. The final release date has not been changed. -- Marshall (who is at a WG21 meeting all week)

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Boost Dinner at ISO meeting in San Diego
by Jon Kalb 07 Nov '18

07 Nov '18

If you are in, or close to, the San Diego area, please join us tomorrow (Wednesday) evening at 18:00 at Gordon Biersch (5010 Mission Center Rd, San Diego, CA 92108) for a Boost Interest Dinner. https://gordonbiersch.com/locations/san-diego/ We’ll be in the patio area. Thanks. Jon

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[Boost.Asio] Allow/DisAllow client connection to Serveur.
by Gadamatik 06 Nov '18

06 Nov '18

Hello to all, I'm trying to develop a serveur that will allow/disallow a client to access internet according a ticket provided to him, just a kind of Raduis. Because Boost.Asio deal with OS, so I just want the client get access to internet if, only if he has a ticket that my server will provide him. I'm looking the way to do this but i'm really stick at this point. I'll really appreciate your strong help to find a way, just a way. I'm working on Windows. Thanks in advance. ----- La patience guide mes raisons -- Sent from: http://boost.2283326.n4.nabble.com/Boost-Users-f2553780.html

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Regarding certificate verification using Asio
by David Demelier 05 Nov '18

05 Nov '18

Hello, This is more a general question about certificates verification in SSL contexts. I hope this is not too much offtopic. I know how asymmetric encryption works, but I never dig a lot into the process of certificates verification. I know how certificate checks are made with browsers, the server must have a certificate signed by a trusted CA. But then, I must admit that I don't know many more. For example, A lot of Linux package managers use package signing to be sure that packages downloaded are correctly built from the vendor. But this is another topic I guess. Now, for example, I would like to create my own server process and my own client. They are not open to the internet, so no need to buy trusted authority certificates. So by generating self-signed certificate and private key file. The server can run. The question is: how the client be sure that it is connecting to the right server? Do this client needs to have the same certificate on its local machine and use it? If yes, should I use ssl::context::load_verify_file and ssl::verify_peer and I'm done? If you have some resources to advice me on the certificate check mechanisms, please give me. Regards -- David

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Compile Boost 1.64 on ARM64
by Lior Koskas 04 Nov '18

04 Nov '18

Hello, I'm trying to compile boost on my 64 ARM machine. In order to compile I ran this command ./bootstrap.sh && ./b2. When I'm looking at the output of the b2 program, I noticed that it does not recognize my machine as ARM architecture: Performing configuration checks - 32-bit : no (cached) - 64-bit : yes (cached) - arm : no (cached) - mips1 : no (cached) - power : no (cached) - sparc : no (cached) - x86 : yes (cached) How can I enforce boost to compile as ARM64 architecture? Thank you, -- Lior

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Missing boost/test/utils/trivial_singleton.hpp header
by Martin Beseda 04 Nov '18

04 Nov '18

Hello everybody, I'm beginning with the Boost.Test library and I wanted to use it together with Turtle Mock library <http://turtle.sourceforge.net/>, as it claims to be developed specifically for usage with Boost. The problem is, I'm getting the error, that boost/test/utils/trivial_singleton.hpp is missing. I'm using other Boost headers with no problem, so I had a look at the codes and it seems, that trivial_singleton.hpp header is not there. Also, I couldn't find him in the online repository. Was the header relocated or removed? Thank you very much for the information, Martin

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