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Using both boost 64 and 32 bit on Windows with CMake
by Klaim - Joël Lamotte 18 Apr '13

18 Apr '13

It appear that this mailing list don't accept cross messages so I'm posting a link to a discussion related to both boost and cmake. Basically I'm looking for guidance to help improving development of one application using boost in 64 and 32 bit modes by finding a way to make the FindBoost cmake module find the right binaries depending on either mode. Currently you have to specify an undocumented CMake variable manually to do this. See the full discussion: http://cmake.3232098.n2.nabble.com/boost-b2-Differenciate-32bit-and-64-bit-… Joel Lamotte

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Interested in working on a project for Boost
by Ganesh Prasad 18 Apr '13

18 Apr '13

I am a Student of 2nd Semester, B.Tech in Computer Science and Engineering from National Institute of Technology, Rourkela, India. I am interested in working on a project on “ Developing Data Structures and related algorithms for a generalized Matrix and Vector Class” for the Boost Libraries as a participant of GSoC. I have some experience in working on algorithm development in C++. And I am positive that I have pretty good knowledge in advanced C/C++.I have participated in various coding contests too. Though I am just a student of Second Semester, I can assure you that I'll be working up to the requirements and expectations. But I am new to this GSoC program. I need advice and help to go on with this project. So, requesting advice and help before I start discussing about my project ideas. :) -Ganesh Prasad

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[range] location of numeric algorithms
by Nathan Ridge 18 Apr '13

18 Apr '13

Hi, Is there any reason the numeric algorithms in Boost.Range (accumulate(), inner_product(), etc.) are located in boost/range/numeric.hpp rather than in files named boost/range/algorithm/<algorithm-name>.hpp like every other algorithm? I think it's confusing for users who expect the uniform file naming convention that Boost.Range applies to other algorithms, to apply to these ones too. Thanks, Nate

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[iostreams] Doc errors
by Richard Hadsell 18 Apr '13

18 Apr '13

I'm just starting to read the Boost.Iostreams documentation and found a couple of minor errors. Perhaps someone would like to make these trivial corrections to help other novices in the future. (1) 2.1.4. In the implementation of container_device::write, the block that writes remaining characters at the end of the container ("if (result < n) { ... }") should insert characters from 's + result', not from 's': "container_.insert(container_.end(), s + result, s + n);". (2) 2.1.4. In the implementation of container_device::seek, there are 3 uses of "ios_bas" instead of "ios_base". -- Dick Hadsell 203-992-6320 Fax: 203-992-6001 Reply-to: hadsell(a)blueskystudios.com Blue Sky Studioshttp://www.blueskystudios.com 1 American Lane, Greenwich, CT 06831-2560 Follow Blue Sky Studios on Facebook <http://www.facebook.com/BlueSkyStudios> and Twitter <http://twitter.com/#%21/blueskystudios>

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GOOGLE sUMMER OF CODE
by kashish jajodia 17 Apr '13

17 Apr '13

Dear sir/ma'am, I am really interested in your project(making libraries for C++) mentioned in google summer of code . I am good in algorithm and acquainted well with c++. What else do you require me to know for being a favourable candidate for this project??? & Do you Have any website/blog where I can get to know about the Boost libraries were included in C++11 standard library Thank you Yours kashish Jajodia B.tech computer science and engineering(second year) National Institute of technology , Trichy India

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About
by Hasit Bhatt 17 Apr '13

17 Apr '13

I am 3rd year student of Computer Science and Engineering from Institute Of Technology, Nirma University, Ahmedabad, one of the best Engineering colleges in Gujarat. I was going through GSoC ideas page and, as I like algorithms, I wish to work on algorithms. So, I just wanted to ask, how can I start working on it. ~ Hasit Bhatt

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[gsoc-2013] Boost.uBLAS
by Jignesh Jain 17 Apr '13

17 Apr '13

I am interested in this project for Gsoc, which involves unification of vector and matrix libraries. I have been browsing boost ublas code, but have no idea about how should I begin as I am totally new to Boost. Can Someone please guide me some approach for getting started in this project. Thank you.

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[log] Segfault in "rotating_file" example
by Jason 16 Apr '13

16 Apr '13

I'm working from SVN trunk revision 83923. I've been experiencing segfaults when trying to set up a file sink that has date/time format specifiers in its file name. I thought I was doing something wrong, but I found that the "rotating_file" example also illustrates the same behavior. Here is a sample backtrace: #0 0x000000000077c0b8 in ?? () #1 0x0000000000415d25 in boost::date_time::microsec_clock<boost::posix_time::ptime>::create_time (converter=0x77c0b8) at /code/env/include/boost/date_time/microsec_time_clock.hpp:100 #2 0x00000000004d628b in boost::log::v2s_mt_posix::sinks::(anonymous namespace)::date_and_time_formatter::operator()(std::string const&, unsigned int) const [clone .isra.401] () #3 0x00000000004d639a in boost::log::v2s_mt_posix::aux::light_function<std::string (unsigned int)>::impl<boost::_bi::bind_t<boost::_bi::unspecified, boost::log::v2s_mt_posix::sinks::(anonymous namespace)::date_and_time_formatter, boost::_bi::list2<boost::_bi::bind_t<boost::_bi::unspecified, boost::log::v2s_mt_posix::sinks::(anonymous namespace)::file_counter_formatter, boost::_bi::list2<boost::_bi::value<std::string>, boost::arg<1> > >, boost::arg<1> > > >::invoke_impl(boost::log::v2s_mt_posix::aux::light_function<std::string (unsigned int)>::impl_base*, unsigned int) () #4 0x00000000004d3c90 in boost::log::v2s_mt_posix::sinks::text_file_backend::consume(boost::log::v2s_mt_posix::record_view const&, std::string const&) () #5 0x00000000004206c6 in boost::log::v2s_mt_posix::sinks::basic_formatting_sink_frontend<char>::feed_record<boost::log::v2s_mt_posix::aux::fake_mutex, boost::log::v2s_mt_posix::sinks::text_file_backend> (this=this@entry=0x783600, rec=..., backend_mutex=..., backend=...) at /code/env/include/boost/log/sinks/basic_sink_frontend.hpp:445 #6 0x000000000042082f in boost::log::v2s_mt_posix::sinks::basic_formatting_sink_frontend<char>::try_feed_record<boost::mutex, boost::log::v2s_mt_posix::sinks::text_file_backend> (this=0x783600, rec=..., backend_mutex=..., backend=...) at /code/env/include/boost/log/sinks/basic_sink_frontend.hpp:489 #7 0x00000000004c1475 in boost::log::v2s_mt_posix::core::push_record_move(boost::log::v2s_mt_posix::record&) () #8 0x000000000040dff1 in push_record (this=<optimized out>, rec=...) at /code/env/include/boost/log/core/core.hpp:308 #9 push_record_unlocked (rec=..., this=<optimized out>) at /code/env/include/boost/log/sources/basic_logger.hpp:268 #10 push_record (rec=..., this=<optimized out>) at /code/env/include/boost/log/sources/basic_logger.hpp:582 #11 ~record_pump (this=0x7fffffffddc0, __in_chrg=<optimized out>) at /code/env/include/boost/log/sources/record_ostream.hpp:279 #12 main (argc=<optimized out>, argv=<optimized out>) at main.cpp:84 Looking at the disassembly of where the segfault happens, it seems to have gone off the rails and is executing invalid code. Specifically, the function pointer "converter" inside the date_time::microsec_clock<>:create_time() function seems to be invalid. Any ideas? I'm using gcc 4.7.2 on Ubuntu 12.10. Jason -- View this message in context: http://boost.2283326.n4.nabble.com/log-Segfault-in-rotating-file-example-tp… Sent from the Boost - Dev mailing list archive at Nabble.com.

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[smart_ptr] No more shared_ptr<T>::value_type?
by Andrew Hundt 16 Apr '13

16 Apr '13

I updated from boost 1.52 to 1.53 and it appears that the typedefs have been removed, I couldn't find any mention of it in the release notes, and I searched the list for shared_ptr value_type and saw no mention of the change there. Was this a deliberate change? This breaks a *lot* of code for me, and will make more difficult for me to convince my team to continue to use boost or upgrade in the future because they are very apprehensive of breaking changes. I understand if it has been removed to be C++11 compliant but I expected some warning before breaking changes like this. boost::thread and boost::filesystem are good examples of changes that were made with solid advance notice. This caught me completely by surprise, did I miss something obvious? Could someone point me to the recommended alternative as well? 1.52 has typedef T value_type: http://www.boost.org/doc/libs/1_52_0/boost/smart_ptr/shared_ptr.hpp 1.53 does not: http://www.boost.org/doc/libs/1_53_0/boost/smart_ptr/shared_ptr.hpp Thanks for your help! Cheers! Andrew Hundt

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Windows Binary Builds
by Tom Kent 16 Apr '13

16 Apr '13

A couple months ago some of us got an e-mail from Dave Abrams saying that since BoostPro was going to be shutting down, there wouldn't be anyone maintaining the windows binary installer that they had been offering. Since I have been making windows binaries available on my site for the last several releases [http://boost.teeks99.com] he suggested that I take this over. I currently have a simple zip file (self extracting though) that just grabs all the 32 bit or 64 bit binaries...and they're huge, 6-8GB installed. So going forward I've built a system to make one installer for each tool/architecture: msvc-8.0-32, msvc-9.0-32, msvc-10.0-32, msvc-11.0-32, msvc-8.0-64, msvc-9.0-64, msvc-10.0-64, msvc-11.0-64. In addition to the binaries for that architecture, I would also include the boost release inside the installer. This way it is a single download/single install for everything an end-user developer would need (for each architecture). If a user wants multiple architectures, he/she can run multiple installers and they will instill on top of each other (with seperate lib directories for each set of binaries...for example: boost_1_53_0/lib_32-msvc-8.0 and boost_1_53_0/lib_64-msvc-11.0). All the scripts I use to build these (assume visual studio pro 8.0, 9.0, 10.0, and 11.0) are on my github account at: https://github.com/teeks99/boost-build If you want to see for yourself, I have the 1.53 installers on my website at: http://boost.teeks99.com/bin/boost_1_53_0-msvc-8.0-32.exe http://boost.teeks99.com/bin/boost_1_53_0-msvc-9.0-32.exe http://boost.teeks99.com/bin/boost_1_53_0-msvc-10.0-32.exe http://boost.teeks99.com/bin/boost_1_53_0-msvc-11.0-32.exe http://boost.teeks99.com/bin/boost_1_53_0-msvc-8.0-64.exe http://boost.teeks99.com/bin/boost_1_53_0-msvc-9.0-64.exe http://boost.teeks99.com/bin/boost_1_53_0-msvc-10.0-64.exe http://boost.teeks99.com/bin/boost_1_53_0-msvc-11.0-64.exe If we like this going forward, I'd be happy to upload these to sourceforge for each release, instead of having to go to my site for them. Thoughts? Tom Kent

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