August 2017 - Boost - lists.preview.boost.org

boost.process 1.64.0 and 1.65.0 are equal
by Egor Pugin 26 Aug '17

26 Aug '17

Hi, See https://github.com/boostorg/process/releases Both boost/process 1.64.0 and 1.65.0 have same commit 4075371. Looks like that boost process 1.65.0 was not updated. Is this a bug or feature? For reference, this was detected in https://github.com/klemens-morgenstern/boost-process/issues/121 -- Egor Pugin

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Important Regression of Boost.Thread on Windows
by Vicente J. Botet Escriba 26 Aug '17

26 Aug '17

Hi, there is an important regression of Boost Thread on Windows https://github.com/boostorg/thread/issues/130 windows: Bug in boost::condition_variable on Windows Please, merge these two patches 1 https://github.com/boostorg/thread/commit/fdc0cbcd8ce8f34a19c7cdaf6f1fa679f… 2 https://github.com/boostorg/thread/commit/395e3d786bc1dce9c60eb84da85f5845a… I've sent a PR for the boost-1.65 release notes https://github.com/boostorg/website/pull/267 If there is a 1.65.1 point release, this issue should be a good candidate. Sorry for the disturbance Vicente

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1.65 build failure on FreeBSD 11.1
by rleigh＠codelibre.net 26 Aug '17

26 Aug '17

The error is "boost/stacktrace/detail/collect_unwind.ipp:55:7: error: no member named '_Unwind_Backtrace' in the global namespace". The details are below. A creeping Linux-ism? Regards, Roger $ clang++ --version FreeBSD clang version 4.0.0 (tags/RELEASE_400/final 297347) (based on LLVM 4.0.0) Target: x86_64-unknown-freebsd11.1 Thread model: posix InstalledDir: /usr/bin $ uname -a FreeBSD brill 11.1-RELEASE FreeBSD 11.1-RELEASE #0 r321309: Fri Jul 21 02:08:28 UTC 2017 root@releng2.nyi.freebsd.org:/usr/obj/usr/src/sys/GENERIC amd64 -- Building boost (Unix) with toolset=clang cxxflags= -I/opt/hudson/workspace/OME-FILES-CPP-DEV-merge-superbuild/BUILD_TYPE/Release/node/brill/build/stage/include linkflags= -L/opt/hudson/workspace/OME-FILES-CPP-DEV-merge-superbuild/BUILD_TYPE/Release/node/brill/build/stage/lib Performing configuration checks - 32-bit : no - 64-bit : yes - arm : no - mips1 : no - power : no - sparc : no - x86 : yes - symlinks supported : yes - C++11 mutex : no - lockfree boost::atomic_flag : yes - Boost.Config Feature Check: cxx11_auto_declarations : no - Boost.Config Feature Check: cxx11_constexpr : no - Boost.Config Feature Check: cxx11_defaulted_functions : no - Boost.Config Feature Check: cxx11_final : no - Boost.Config Feature Check: cxx11_hdr_mutex : no - Boost.Config Feature Check: cxx11_hdr_tuple : no - Boost.Config Feature Check: cxx11_lambdas : no - Boost.Config Feature Check: cxx11_noexcept : no - Boost.Config Feature Check: cxx11_nullptr : no - Boost.Config Feature Check: cxx11_rvalue_references : no - Boost.Config Feature Check: cxx11_template_aliases : no - Boost.Config Feature Check: cxx11_thread_local : no - Boost.Config Feature Check: cxx11_variadic_templates : no - has_icu builds : no warning: Graph library does not contain MPI-based parallel components. note: to enable them, add "using mpi ;" to your user-config.jam - zlib : yes - bzip2 : yes - lzma : yes - iconv (libc) : yes - icu : yes - xlocale supported : yes - native-atomic-int32-supported : yes - native-syslog-supported : yes - pthread-supports-robust-mutexes : yes - compiler-supports-visibility : yes - compiler-supports-ssse3 : yes - compiler-supports-avx2 : yes - gcc visibility : yes - long double support : yes warning: skipping optional Message Passing Interface (MPI) library. note: to enable MPI support, add "using mpi ;" to user-config.jam. note: to suppress this message, pass "--without-mpi" to bjam. note: otherwise, you can safely ignore this message. - libbacktrace builds : no - addr2line builds : yes - WinDbg builds : no - WinDbgCached builds : no Component configuration: - atomic : building - chrono : building - container : building - context : building - coroutine : building - date_time : building - exception : building - fiber : building - filesystem : building - graph : building - graph_parallel : building - iostreams : building - locale : building - log : building - math : building - metaparse : building - mpi : building - program_options : building - python : not building - random : building - regex : building - serialization : building - signals : building - stacktrace : building - system : building - test : building - thread : building - timer : building - type_erasure : building - wave : building [...] clang-linux.compile.c++.without-pth bin.v2/libs/stacktrace/build/clang-linux-4.0.0/release/threading-multi/addr2line.o "/usr/bin/CC" -c -x c++ -I/opt/hudson/workspace/OME-FILES-CPP-DEV-merge-superbuild/BUILD_TYPE/Release/node/brill/build/stage/include -O3 -Wno-inline -Wall -pedantic -pthread -fPIC -m64 -I/opt/hudson/workspace/OME-FILES-CPP-DEV-merge-superbuild/BUILD_TYPE/Release/node/brill/build/stage/include -DBOOST_ALL_NO_LIB=1 -DBOOST_STACKTRACE_DYN_LINK=1 -DNDEBUG -I"." -o "bin.v2/libs/stacktrace/build/clang-linux-4.0.0/release/threading-multi/addr2line.o" "libs/stacktrace/build/../src/addr2line.cpp" In file included from libs/stacktrace/build/../src/addr2line.cpp:10: In file included from /opt/hudson/workspace/OME-FILES-CPP-DEV-merge-superbuild/BUILD_TYPE/Release/node/brill/build/stage/include/boost/stacktrace/detail/frame_unwind.ipp:15: In file included from /opt/hudson/workspace/OME-FILES-CPP-DEV-merge-superbuild/BUILD_TYPE/Release/node/brill/build/stage/include/boost/stacktrace/frame.hpp:20: In file included from /opt/hudson/workspace/OME-FILES-CPP-DEV-merge-superbuild/BUILD_TYPE/Release/node/brill/build/stage/include/boost/stacktrace/safe_dump_to.hpp:213: /opt/hudson/workspace/OME-FILES-CPP-DEV-merge-superbuild/BUILD_TYPE/Release/node/brill/build/stage/include/boost/stacktrace/detail/collect_unwind.ipp:55:7: error: no member named '_Unwind_Backtrace' in the global namespace ::_Unwind_Backtrace(&boost::stacktrace::detail::unwind_callback, &state); ~~^ 1 error generated. ...skipped <pbin.v2/libs/stacktrace/build/clang-linux-4.0.0/release/threading-multi>libboost_stacktrace_addr2line.so.1.65.0 for lack of <pbin.v2/libs/stacktrace/build/clang-linux-4.0.0/release/threading-multi>addr2line.o... ...skipped <p/opt/hudson/workspace/OME-FILES-CPP-DEV-merge-superbuild/BUILD_TYPE/Release/node/brill/build/stage/lib>libboost_stacktrace_addr2line.so.1.65.0 for lack of <pbin.v2/libs/stacktrace/build/clang-linux-4.0.0/release/threading-multi>libboost_stacktrace_addr2line.so.1.65.0... ...skipped <p/opt/hudson/workspace/OME-FILES-CPP-DEV-merge-superbuild/BUILD_TYPE/Release/node/brill/build/stage/lib>libboost_stacktrace_addr2line.so for lack of <p/opt/hudson/workspace/OME-FILES-CPP-DEV-merge-superbuild/BUILD_TYPE/Release/node/brill/build/stage/lib>libboost_stacktrace_addr2line.so.1.65.0... clang-linux.compile.c++.without-pth bin.v2/libs/stacktrace/build/clang-linux-4.0.0/release/threading-multi/basic.o "/usr/bin/CC" -c -x c++ -I/opt/hudson/workspace/OME-FILES-CPP-DEV-merge-superbuild/BUILD_TYPE/Release/node/brill/build/stage/include -O3 -Wno-inline -Wall -pedantic -pthread -fPIC -m64 -I/opt/hudson/workspace/OME-FILES-CPP-DEV-merge-superbuild/BUILD_TYPE/Release/node/brill/build/stage/include -DBOOST_ALL_NO_LIB=1 -DBOOST_STACKTRACE_DYN_LINK=1 -DNDEBUG -I"." -o "bin.v2/libs/stacktrace/build/clang-linux-4.0.0/release/threading-multi/basic.o" "libs/stacktrace/build/../src/basic.cpp" In file included from libs/stacktrace/build/../src/basic.cpp:9: In file included from /opt/hudson/workspace/OME-FILES-CPP-DEV-merge-superbuild/BUILD_TYPE/Release/node/brill/build/stage/include/boost/stacktrace/detail/frame_unwind.ipp:15: In file included from /opt/hudson/workspace/OME-FILES-CPP-DEV-merge-superbuild/BUILD_TYPE/Release/node/brill/build/stage/include/boost/stacktrace/frame.hpp:20: In file included from /opt/hudson/workspace/OME-FILES-CPP-DEV-merge-superbuild/BUILD_TYPE/Release/node/brill/build/stage/include/boost/stacktrace/safe_dump_to.hpp:213: /opt/hudson/workspace/OME-FILES-CPP-DEV-merge-superbuild/BUILD_TYPE/Release/node/brill/build/stage/include/boost/stacktrace/detail/collect_unwind.ipp:55:7: error: no member named '_Unwind_Backtrace' in the global namespace ::_Unwind_Backtrace(&boost::stacktrace::detail::unwind_callback, &state); ~~^ 1 error generated. ...skipped <pbin.v2/libs/stacktrace/build/clang-linux-4.0.0/release/threading-multi>libboost_stacktrace_basic.so.1.65.0 for lack of <pbin.v2/libs/stacktrace/build/clang-linux-4.0.0/release/threading-multi>basic.o... ...skipped <p/opt/hudson/workspace/OME-FILES-CPP-DEV-merge-superbuild/BUILD_TYPE/Release/node/brill/build/stage/lib>libboost_stacktrace_basic.so.1.65.0 for lack of <pbin.v2/libs/stacktrace/build/clang-linux-4.0.0/release/threading-multi>libboost_stacktrace_basic.so.1.65.0... ...skipped <p/opt/hudson/workspace/OME-FILES-CPP-DEV-merge-superbuild/BUILD_TYPE/Release/node/brill/build/stage/lib>libboost_stacktrace_basic.so for lack of <p/opt/hudson/workspace/OME-FILES-CPP-DEV-merge-superbuild/BUILD_TYPE/Release/node/brill/build/stage/lib>libboost_stacktrace_basic.so.1.65.0... common.mkdir bin.v2/libs/timer

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Bug in Boost-1.65 Windows binaries.
by Stefan Seefeld 25 Aug '17

25 Aug '17

Hello, I just received a bug report (https://github.com/boostorg/python/issues/129) related to the Boost 1.65 Windows binaries. Not being able to reproduce the error when building from source myself (on Windows), I wonder where to file issues that are specific to the Windows binaries. Does that have a dedicated maintainer ? (The bug is that the Boost.Python libraries built for Python3 actually link to Python27.) Thanks, Stefan -- ...ich hab' noch einen Koffer in Berlin...

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[github] Super-project not updating.
by Rene Rivera 25 Aug '17

25 Aug '17

It seems that the super-project is not getting updated for any branch since yesterday. -- -- Rene Rivera -- Grafik - Don't Assume Anything -- Robot Dreams - http://robot-dreams.net -- rrivera/acm.org (msn) - grafikrobot/aim,yahoo,skype,efnet,gmail

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[trac][poly_collection][stacktrace] request for Trac components
by Joaquin M López Muñoz 25 Aug '17

25 Aug '17

Hi, Can a "poly_collection" component (assigned to me) be added to the Trac ticketing system? I guess Vinnie'll need a "stacktrace" component, too. Thank you, Joaquín M López Muñoz

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fix release for 1.65?
by Oliver Kowalke 25 Aug '17

25 Aug '17

Hello, is a fix-release for 1.65 possible? It seams that the fixes that were too late to get merged into 1.65 are need to prevent segfaults in 1.65. Oliver

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[Root.Ptr] C Crash Proof - Completed
by Phil Bouchard 25 Aug '17

25 Aug '17

Greetings, Most of you know the former programming language I was working on: https://github.com/philippeb8/root_ptr/tree/bb++/bbpp2cpp I decided to turn this into a C parser which converts C code into C++ and adds the memory manager I wrote plus other utilities to detect the exact location the memory leaks (missing call to free()). It works with traditional missing sequential calls to free() and even references that are cyclic as you can see in the attached example (input2.c). Please note that the attached C code uses basic C++ functionality such as constructors and destructors to help having a descriptive output (input2.txt). So if you have such a memory leak problem in C then please let me know and I'll be happy to offer consulting services, remotely preferably, to the employer you're working for. The problem should be solved fairly quickly. On my side I will perhaps improve the parser if necessary and automate the whole process soon. All the best! -Phil Note: For the moment the size of arrays allocated with malloc() needs to be a compile-time constant and the returned line number is not precise.

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[config] BOOST_STATIC_CONSTEXPR in C++11 vs C++14
by Lakshay Garg 23 Aug '17

23 Aug '17

This conversation is in reference to https://github.com/boostorg/math/pull/82 but I'm posting it here because it might be of interest to some. On 22 August 2017 at 13:53, jzmaddock <notifications(a)github.com> wrote: > Note that those changes don't actually make the functions constexpr - or > indeed change the way the constants are initialized - in fact in C++14 > BOOST_STATIC_CONSTEXPR doesn't even imply the constants are "const > (C++11 is different, and early implementations prevent you from writing > "constexpr const" which is what C++14 permits). Since BOOST_STATIC_CONSTEXPR behaves differently in C++11 and 14, would it be a good idea for boost.config to provide a macro for handling the `static const var = ...;` kind of variable initializations in a portable manner? Maybe something like BOOST_COMPILETIME_CONSTANT? Such a macro might will be useful for declarations where we want the variable to be a constant in all possible senses (compile-time, run-time) and allow generating the most optimal code possible with the language version, compiler being used in a portable manner. An example of the kind of constants I am talking about can be seen here: https://github.com/boostorg/math/blob/develop/include/boost/math/special_fu… Lakshay

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Review Request: impl_ptr (pimpl)
by Vladimir Batov 22 Aug '17

22 Aug '17

After much procrastination I would like to request a formal review for the pimpl library... once and for all :-) (given it's been through a few almost-reviews and discussions)... to get some kind of a resolution one way or the other. :-) On one hand it is embarrassingly simple and no match to a string of late TMP submissions. On the other hand it seems quite handy for ordinary s/w folk (like me) as it formalizes, streamlines and noticeably simplifies (IMO) pimpl-based deployments and makes code-review process quite simple and straightforward. Its benefits are more visible for pimpls with exclusive-ownership proxy-implementation relationships (value-semantics pimpls) as it uses internally an incomplete-type management smart pointer instead of std:unique_ptr. Given that it is policy-based I am hoping others might get interested writing additional policies within that framework such as COW or stack-based. The major oddity/peculiarity (that caused a stir before and Gavin mentioned about a year ago) is that the main class -- impl_ptr -- is declared in the global namespace. That might happen to be a deal breaker but that's the best I could come up with to get it to work. If anyone has a better working solution, I am all ears. That "oddity" is an "implementation detail" and does not affect the user -- from the user side it appears inside boost. Like boost::impl_ptr... Internally to address that we might think of striking a compromise. For ex., instead of the traditional namespace boost { template<> class impl_ptr } have template<> class _boost_impl_ptr_ Again, that is an implementation nit, wrinkle, niggle (IMO anyway). From the outside it all looks kosher -- boost::impl_ptr<...> and such. The code and the docs are at https://github.com/yet-another-user/pimpl <https://github.com/yet-another-user/pimpl>. Due to personal circumstances Glen -- Pimpl's original manager -- had to bail out. So, if anyone kindly steps forward to manage the review, that'd be immensely appreciated. Thank you, Vladimir. P.S. Ron, I am only CCing you so that you'd put it to the schedule... Tnx.

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