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Boost.Python NumPy extension
by Stefan Seefeld 09 Oct '16

09 Oct '16

Hello, I'm happy to announce that I just merged the NumPy C++ wrappers from https://github.com/ndarray/Boost.NumPy into Boost.Python's development branch. (Online documentation for it can be browsed here: http://boostorg.github.io/python/develop/doc/html/numpy) I'd very much like to be able to merge this into the master branch for the next Boost release (version 1.63). At present I'm using SCons to build Boost.Python (stand-alone, against a separately installed Boost), which is also the infrastructure I use for CI testing (https://travis-ci.org/boostorg/python) I would like to ask for help with integrating the new NumPy extension into the Boost.Build-based build system, such that this will also be picked up by the regular Boost infrastructure. Please refer to https://github.com/boostorg/python/issues/89 if you'd like to help with this. Many thanks ! Stefan -- ...ich hab' noch einen Koffer in Berlin...

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Build: Trying to get Boost.Build to see my OpenSSL on Windows
by Vinnie Falco 07 Oct '16

07 Oct '16

I'm trying to build the Asio SSL examples but bjam can't find my OpenSSL installation on Windows (using Visual Studio 2015). Everything else builds. And I am having the dickens of a time finding any information on the web about mixing Windows, OpenSSL, and bjam. As a last resort I've thrown a hail mary to StackOverflow: http://stackoverflow.com/questions/39800333/how-do-i-get-bjam-to-set-includ… I'm not clear on what this line does on Windows using MSVC: lib ssl ; The line appears in Asio Jamfiles that use OpenSSL. Any help is appreciated, thank you.

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[doc] Doc directory for a library
by Edward Diener 07 Oct '16

07 Oct '16

If a library does not have a 'doc' subdirectory, because the doc is not buildable but is rather hardcoded into an HTML file, what is the best way to satsify Boost and the boost_check_library regression test for that library ?

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Upcoming changes to _MSC_VER
by Gabriel Dos Reis 07 Oct '16

07 Oct '16

Hi, This is a heads up. I spoke with Beman at CppCon about this: the upcoming release of Visual Studio (VS "15") has some changes to how _MSC_VER will be defined at every (future) update. These changes are already implemented in 'VS "15" Preview 5'. The full details are here https://blogs.msdn. microsoft.com/vcblog/2016/10/05/visual-c-compiler-version/ Internal testing showed that some components of Boost source code needed a few changes to use inequalities instead of equalities with _MSC_VER. Thanks, PS: The formal documentation of _MSVC_LANG is coming. -- Gaby

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Review request: Beast
by Vinnie Falco 04 Oct '16

04 Oct '16

Can Beast please be added to the review queue? Michael Caisse has volunteered to act as the review manager. Beast provides C++11, header-only implementations of the HTTP and WebSocket protocols using Boost.Asio and presenting a consistent, modern synchronous and asynchronous interface style. Beast project repository https://github.com/vinniefalco/Beast HTML documentation http://vinniefalco.github.io/beast Boost incubator link: http://blincubator.com/bi_library/beast-2/?gform_post_id=1579 Thanks!

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Extending Boost.Python with NumPy support
by Stefan Seefeld 04 Oct '16

04 Oct '16

Hello, I'm presently working on a few improvements to the Boost.Python module. As part of this I'm refactoring the numeric API to actually support NumPy. There has been quite a lot of effort we put into this in the past (notably a GSoC project I mentored a few years ago), but we never managed to include this into the Boost master branch, so it's never been formally released. As I'm now getting ready to polish this work off, I wonder whether any of this would require a formal submission as a new Boost library, or whether it can just be done under the Boost.Python umbrella ? I reckon this is somewhat of a gray area, so I'd like to clarify whether there are concrete rules for what changes / additions require a formal review process. Thanks, Stefan -- ...ich hab' noch einen Koffer in Berlin...

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Re: [boost] [Boost-users] Need help with errors while building boost for clang on android NDK
by Robert Dailey 04 Oct '16

04 Oct '16

On Wed, Sep 28, 2016 at 10:49 AM, Robert Dailey <rcdailey.lists(a)gmail.com> wrote: > On Mon, Sep 26, 2016 at 11:55 AM, Robert Dailey > <rcdailey.lists(a)gmail.com> wrote: >> On Mon, Sep 26, 2016 at 11:09 AM, Oliver Kowalke >> <oliver.kowalke(a)gmail.com> wrote: >>> 2016-09-26 17:57 GMT+02:00 Robert Dailey <rcdailey.lists(a)gmail.com>: >>>> >>>> >> > clang-linux.compile.asm >>>> >> > >>>> >> > >>>> >> > bin.v2\libs\context\build\clang-linux-android\release\link-static\runtime-link-static\target-os-linux\threading-multi\asm\make_i386_ms_pe_gas.o >>>> >> > libs\\context\\src\\asm\\make_i386_ms_pe_gas.asm:30:1: error: unknown >>>> >> > directive >>>> >> > .def _make_fcontext; .scl 2; .type 32; .endef >>>> > >>>> > >>>> > you try to build for i386 instead arm >>>> >>>> How can I make it use arm instead? >>> >>> >>> I assume you try to cross compile : >>> http://www.boost.org/doc/libs/1_61_0/libs/context/doc/html/context/architec… >> >> I am indeed trying to cross compile, however I am not familiar with b2 >> nor do I much care to learn it (since it's a means to an end for me to >> build boost). >> >> Can you provide an example of how I can specify the documented >> settings to b2 for my build? Do I provide the values to those in my >> project-config file? > > Would really love help with this guys. I literally can't find info on > this anywhere else. Surely someone has had success getting 1.61 > building with NDK + ARM + Clang. > > I made a best-guess using the context cross compiling settings linked > earlier. Does this seem correct? It doesn't build at the moment saying > it can't find locale-related symbols. That doesn't help me at all so I > guess I'm going to have to dig into the llvm STL code and find out > what preprocessor flags I'm missing (assuming it's that simple). Also > I still don't know how to specify 'ar' and 'ranlib' executables to > boost from NDK. > > > using clang : android : > $(androidNDKRoot)/toolchains/llvm/prebuilt/$(androidPlatform)/bin/clang++ : > <compileflags>--sysroot=$(androidNDKRoot)/platforms/android-15/arch-arm > <compileflags>-Os > <compileflags>-fno-strict-aliasing > <compileflags>-O2 > <compileflags>-DNDEBUG > <compileflags>-g > <compileflags>-I$(androidNDKRoot)/sources/cxx-stl/llvm-libc++abi/libcxxabi/include > <compileflags>-I$(androidNDKRoot)/sources/cxx-stl/llvm-libc++/libcxx/include > <compileflags>-I$(androidNDKRoot)/sources/cxx-stl/llvm-libc++/libs/armeabi-v7a > <compileflags>-I$(androidNDKRoot)/sources/android/support/include > <compileflags>-DANDROID > <compileflags>-D__ANDROID__ > <compileflags>-D__arm__ > <compileflags>-D_REENTRANT > <architecture>arm > <address-model>32 > <binary-format>pe > <abi>aapcs > ; FYI: I still haven't gotten this working. Sorry to keep bumping this thread but I have absolutely zero options yet. I need help from the boost developers at this point, I think.

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[concept_check] convert Concept to trait?
by Vinnie Falco 04 Oct '16

04 Oct '16

I don't see a place to open issues on https://github.com/boostorg/concept_check so I am posting this here. What I want to do is convert a concept into a trait. For example, given the ForwardIterator concept checking class, I would like to write: template<T> using is_ForwardIterator = std::integral_constant<bool, ...>; Which aliases to std::true_type if T meets the requirements of ForwardIterator and false otherwise. Or perhaps a general purpose alias: template<t> using is_concept<T, C> = std::integral_constant<bool, ...>;l Which aliases to std::true_type if T meets the requirements of concept C. Are such things possible, or perhaps already in the library? My preliminary analysis suggests the answers to these questions are no and no. Has this point been brought up elsewhere, and if so where could I find it? Regards

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preparation for Gsoc 2017
by Prashant Kumar 04 Oct '16

04 Oct '16

Hello Boost community, I need some help for preparing effectively for Gsoc 17 with Boost community. I have been through the boost gsoc webpage and for getting selected in Gsoc an aspirant need to provide competency Test. I want to know that apart from competency test what other projects would be helpful in making my proposal strong. Should I be writting more programs using boost library ? , should I be aware of all boost libraries ?. I want your suggestions as I'm very serious regarding the matter. thanks!! and sorry if the question is quite nooby.

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How to build Boost with VS15
by Olaf van der Spek 04 Oct '16

04 Oct '16

Hi, How does one build Boost (1.62) with VS15 (Preview 4)? I know it's not officially supported.. C:\VC\boost>bootstrap.bat Building Boost.Build engine 'cl' is not recognized as an internal or external command, operable program or batch file. Failed to build Boost.Build engine. Please consult bootstrap.log for further diagnostics. -- Olaf

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