July 2015 - Boost - lists.preview.boost.org

[mpl] Problem with VC++14 and boost::mpl::size_t
by Edward Diener 27 Jul '15

27 Jul '15

The just released VC++14 has a problem with the boost::mpl::size_t template. After preprocessing it sees: namespace boost { namespace mpl { template< std::size_t N > struct size_t { static const std::size_t value = N; typedef size_t type; typedef std::size_t value_type; typedef integral_c_tag tag; typedef boost::mpl::size_t< static_cast<std::size_t>((value + 1)) > next; typedef boost::mpl::size_t< static_cast<std::size_t>((value - 1)) > prior; operator std::size_t() const { return static_cast<std::size_t>(this->value); } }; template< std::size_t N > std::size_t const boost::mpl::size_t< N >::value; }} and gives the error message: size_t.cpp(nnn): error C2872: 'size_t': ambiguous symbol predefined C++ types (compiler internal)(16): note: could be 'unsigned int size_t' size_t.cpp(nnn): note: or 'boost::mpl::size_t' pointing to the line after it encounters 'struct size_t' as far as I can make out ( you need to preprocess the size_t.cpp test, comment out the #line directives and run the test against the preprocessed result to see what the compiler is objecting to ). It therefore fails a number of mpl tests which all prior versions of VC++ pass. It flags this error in 5 mpl tests which use the boost::mpl::size_t integral wrapper, among which the easiest to analyze is the size_t.cpp test itself. Anybody have any idea what is going on here with the compiler, or whether it can be fixed somehow in VC++14 for the mpl code ?

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[config] BOOST_NO_CXX11_HDR_CODECVT is not defined for VC14
by Andrey Semashev 27 Jul '15

27 Jul '15

Hi, I see that BOOST_NO_CXX11_HDR_CODECVT is not defined for MSVC-14, although it is known that the codecvt facets are unusable because of linkin errors: https://connect.microsoft.com/VisualStudio/feedback/details/1348277/link-er… You can also see STL mentioning DevDiv#1060849 here: http://blogs.msdn.com/b/vcblog/archive/2014/11/12/visual-studio-2015-previe… and I can see that the problem is not fixed in RTM. This also concerns std::codecvt specializations for char16_t and char32_t. Can we define the BOOST_NO_CXX11_HDR_CODECVT macro for MSVC?

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[predef] Fails on Intel/win
by John Maddock 27 Jul '15

27 Jul '15

BOOST_COMP_INTEL is set to 0, which means that [ predef-require "BOOST_COMP_INTEL" ] fails. __INTEL_COMPILER is set to 1500. BOOST_COMP_INTEL is set to ( (((0)%100)*10000000) + (((0)%100)*100000) + ((0)%100000) ) Thanks, John.

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__NR_eventfd syscall
by Alexey Brodkin 27 Jul '15

27 Jul '15

Hi, When building Boost for ARC architecture we're seeing this failure: --------------------->8--------------------- ./boost/asio/detail/impl/eventfd_select_interrupter.ipp: In member function 'void boost::asio::detail::eventfd_select_interrupter::open_descriptors()': ./boost/asio/detail/impl/eventfd_select_interrupter.ipp:50:50: error: '__NR_eventfd' was not declared in this scope write_descriptor_ = read_descriptor_ = syscall(__NR_eventfd, 0); --------------------->8--------------------- This happens clearly because ARC following Linux kernel's UAPI doesn't define __NR_eventfd syscall. If you look here https://github.com/torvalds/linux/blob/master/include/uapi/asm-generic/unis… you may notice that "eventfd" syscall with some others resides in "#ifdef__ARCH_WANT_SYSCALL_NO_FLAGS". And from what I may see only "score" architecture has this __ARCH_WANT_SYSCALL_NO_FLAGS defined. Most of other arches that don't use unistd.h from "include/uapi/asm-genereic" folder have "eventfd" syscall defined. For example it's true for ARM (both 32 and 64 versions). So I'd say it's not the best way to use directly a syscall that's being obsoleted in "Boost". And so real fix would be to modify Boost's "eventfd_select_interrupter::open_descriptors()" for example with use of really generic "eventfd2" or even better use libc's eventfd() call instead of direct syscall. Any thoughts what would be the best fix here? -Alexey

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[ublas] [1.5.9.0b1] Merge patch for broken boost::numeric::ublas::shallow_array_adaptor since 1.58
by Hugues Malphettes 24 Jul '15

24 Jul '15

Hi everyone, Does somebody knows how to proceed to merge the patch filed here: https://svn.boost.org/trac/boost/ticket/11207 I am forced to remain on 1.57 because of this issue. At the minimum there are 4 projects affected: myself, Mark Moll who filed the issue on track and nasosi and vh4n who filed the same patch here: https://github.com/uBLAS/ublas/pull/30/files I had convinced myself that because it had been merged in github we would be good to go for 1.59. I just tested 1.59.0b1 and it has not been merged. Many thanks for your help! Hugues

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Test Runner Update to vc14.0 - CTP 6
by Tom Kent 23 Jul '15

23 Jul '15

Just a heads up, I have just updated the test runner teeks99-08f-win2012R2-64on64 from vc14.0 - CTP 4 to vc14.0 - CTP 6. The change should show up in the next run of that runner in a few hours. I think some people were waiting to see if MS was fixing some things, so I thought I'd send a message letting people know these results would be available. Tom

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Genetics library: Volunteers needed
by Andy Thomason 23 Jul '15

23 Jul '15

Hi All, I am recruiting users for the putative genetics library. https://github.com/andy-thomason/genetics We have a few simple examples of gene searching and I am working on a more complete aligner example and some performance improvements to the index data structure. For data, you can obtain the human genome from: ftp://ftp.ensembl.org/pub/release-81/fasta/homo_sapiens/dna/Homo_sapiens.GR… Interesting problems we would like to solve: Given a 20 character sequence with up to six errors, what is the fastest way to list all possibilities other than a brute force search (CRISPR). Can we use JNI to connect the library to Hadoop and other distributed seach systems? Can we construct a database of all known viral genomes including recombination? Can we detect variations in MHC VDJ regions within a single sample? Many other interesting puzzles are there to be found... Andy. --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com

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Trouble with Boost.Test on ESXi
by William Winder 23 Jul '15

23 Jul '15

I'm using Boost.Test and Boost v1.55 to unit test an application on Windows/Linux/ESXi. The ESXi build is done on a CentOS 5.10 machine, this has been working well for the main application, but the Boost.Test binary hits an assert before running any tests: /tmp # ./MyTests Test setup error: system_error produced by: ::sigaltstack( 0, &sigstk ) != -1: Function not implemented The "Function not implemented" problem has been a recurring problem for me while making my application compatible with ESXi. My basic understanding is that ESXi implements a subset of glibc. I saw a similar issue here: http://comments.gmane.org/gmane.comp.lib.boost.testing/7782 I'm wondering how I can disable this assert and what the repercussions would be. Thanks

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Re: [boost] Genetics Library:Volunteers Needed
by Mudit Sharma 23 Jul '15

23 Jul '15

Hi! I am deeply interested in volunteering for genetics library in Boost. I have sound knowledge of boost libraries. Note:This project can help me personally. Thanks! M

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gcc 5.1/6.0 warnings with smart_ptr
by Gennadiy Rozental 23 Jul '15

23 Jul '15

Hi, There are bunch of warnings like these: ../boost/smart_ptr/shared_ptr.hpp:249:65: warning: 'template<class> class std::auto_ptr' is deprecated [-Wdeprecated-declarations] Any chance we can shut these down? Maybe update toolset config? Gennadiy

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