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problems with installing boost python
by Wilson Tan 17 Aug '11

17 Aug '11

Hello everyone, I had been trying to build BOOST for SST, but so far I had been unsuccessful with the Python(and IOSTREAM) components. I followed Section 3.1( http://www.boost.org/doc/libs/1_47_0/libs/python/doc/building.html) but even that is not fully successful: wilson@vorpalsword:~/SST/boost_1_47_0$ ./bjam --build-dir=~/SST/boost_1_47_0/libs/python/example/quickstart toolset=gcc --verbose-test test notice: could not find main target test notice: assuming it is a name of file to create. Building the Boost C++ Libraries. Performing configuration checks - has_icu builds : no - ../config//has_gcc_visibility builds : yes - ../config//has_long_double_support builds : yes don't know how to make <e>test ...found 1 target... ...can't find 1 target... wilson@vorpalsword:~/SST/boost_1_47_0$ The first lines of my Python related errors while installing are the following ...skipped <p/usr/local/lib>libboost_iostreams.so for lack of <p/usr/local/lib>libboost_iostreams.so.1.47.0... gcc.compile.c++ bin.v2/libs/python/build/gcc-4.4.3/release/threading-multi/numeric.o In file included from ./boost/python/detail/prefix.hpp:13, from ./boost/python/numeric.hpp:8, from libs/python/src/numeric.cpp:6: ./boost/python/detail/wrap_python.hpp:75:24: error: patchlevel.h: No such file or directory ./boost/python/detail/wrap_python.hpp:78:2: error: #error Python 2.2 or higher is required for this version of Boost.Python. ./boost/python/detail/wrap_python.hpp:142:21: error: Python.h: No such file or directory ./boost/python/detail/wrap_python.hpp:203:4: error: #error "HAVE_LONG_LONG defined but not PY_LONG_LONG or LONG_LONG" In file included from ./boost/python/object/pointer_holder.hpp:14, from ./boost/python/to_python_indirect.hpp:10, from ./boost/python/converter/arg_to_python.hpp:10, Result of whereis: wilson@vorpalsword:~/SST/boost_1_47_0$ whereis python python: /usr/bin/python2.6 /usr/bin/python /etc/python2.6 /etc/python /usr/lib/python3.1 /usr/lib/python2.6 /usr/local/lib/python2.6 /usr/include/python2.6 /usr/share/python /usr/share/man/man1/python.1.gz For good measure, I also specified the interpreter location in project-config.jam. # Python configuration using python : 2.6 : /usr/bin/python ; using mpi ; Could somebody give me pointers on how to fix this and get Python running on Boost? I'd really appreciate it.

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Re: [Boost-users] Custom services using boost::asio
by Marat Abrarov 16 Aug '11

16 Aug '11

Hi, Allan. > The Io part is easy to fit into asio, but I'm having problems seeing what > the best way is to implement the core application event processing. > > Using glib::source I could register an interface where two function is > called: > > bool prepare (int &timeout); > bool dispatch (sigc::slot_base *slot); > > Prepare could set a time out identifying how much time should elapse before > dispatch is ready to process an event. > > When the time is passed, the glib main loop will call the dispatch function, > where I then can process the internal events. > > How can this be implemented in boost::asio io_service? May be boost::asio::deadline_timer can help you? http://www.boost.org/doc/libs/1_47_0/doc/html/boost_asio/overview/timers.ht… http://www.boost.org/doc/libs/1_47_0/doc/html/boost_asio/tutorial/tuttimer2… http://www.boost.org/doc/libs/1_47_0/doc/html/boost_asio/reference/deadline… Regards, Marat Abrarov.

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Building boost from straight Windows Command Prompt
by Michael Powell 16 Aug '11

16 Aug '11

So... If I want to build boost from a straight up Windows Command Prompt in the Visual Studio environment, the key is that we run the VCVARSALL.BAT file prior to running the bootstrap, etc, etc? For instance, if we wanted to route a conditional build of boost through our Continuous Integration process using NAnt, for instance... Thank you... Regards, Michael

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How to iterate nested 'structs' in property tree
by Bill Moo 16 Aug '11

16 Aug '11

Hello List, I have an .info file with the following structure and as I am unable to use BOOST_FOREACH to iterate these I was wondering how it was done? Items { Item { ID 999 Description "Text to describe the item" Stuff1 1 Stuff2 0 Stuff3 7 ItemSettings { Setting1 9 Setting2 12 Setting3 0.1 } SubItems { SubItem { ID 0 Status 0 } SubItem { ID 1 Status 0 } } } Item { ; Structure as above } ; And so on... } -- Bill

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[qi and lambda] Get wrong reaction of the qi::rule if I use lambda for the action
by boost_mailinglist＠gmx.de 16 Aug '11

16 Aug '11

Hello, if I execute the following example, I get the following output "The bad one The good one a" but I only expected "The good one a". Why does it happens? Boost 1.47.0 was used. #include <boost/config/warning_disable.hpp> #include <boost/spirit/include/qi.hpp> #include <boost/lambda/lambda.hpp> #include <iostream> int main() { using boost::spirit::qi::char_; using boost::spirit::qi::parse; char const *first = "{a}", *last = first + std::strlen(first); parse(first, last, '{' >> char_("a")[std::cout << "The good one " << boost::lambda::_1 << '\n'] | char_("b")[std::cout << "The bad one " << boost::lambda::_1 << '\n'] >> '}'); return 0; }

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boost multithread use all cores in parallel ?
by Jack Bryan 16 Aug '11

16 Aug '11

Hi, How to make sure that a multithreaded C++ program is run by ALL cores on a multicore server to do computing in parallel physically (not logically). I have a multicore server, which has 24 CPUs, each of which has 6 cores. It is Intel Xeon X5650 2.67GHz cpu cores : 6 (support 6 threads) cpu MHz : 1596.000 totally, I have 24 * 6 = 144 cores. I designed a multithreaded C++ program with boost/thread. How to make sure that my program is run by all 144 cores ? Any help is really appreciated. thanks

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iterator_adaptor : const and regular form
by John M. Dlugosz 15 Aug '11

15 Aug '11

I wrote an iterator by deriving from the boost::iterator_adaptor template. Now I need the const_iterator for my collection, too. The instructions for iterator_adaptor are not clear, but the implication is that I should transfer what I read from iterator_facade. So, is using a const type for the Value (the 3rd template argument) all it takes to write a proper const_iterator? (assuming the functions I supply are proper, too) So, I can just write my iterator as a template of T, passing T through as Value to the iterator_adaptor base class, and then instantiate _that_ with my value type and with const value type to make iterator and const_iterator respectively, right? —John

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[Range] Why adaptor stores iterator_range instead of its underlying range?
by TONGARI 15 Aug '11

15 Aug '11

Hi, I've had this question for a long time, but I still haven't seen others asked the same question. I wonder what's the rationale for range adaptor holding an iterator_range, instead of storing the underlying range (by reference when the range is a container) and calculating begin() and end() on the fly. For C++11 code, it's not unusual to store the temporary expression aside and use it more than once. E.g. vector<int> v = {1, 2, 3}; auto view = v | filtered(...); do_something(view); v.push_back(4); // X do_something(view); Above code is broken since 'v''s iterator is invalidated after X. Could anybody shed some light on this matter?

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[Boost.Range][Boost.Iterators] - iterator as pointer
by Christoph Heindl 15 Aug '11

15 Aug '11

Hi folks, I wonder if it is possible to determine if an iterator or a boost.range can be handled like a pointer to contiguous memory using an iterator/range trait? I need to enable functions if the given range is convertible to a c-array like pointer range. Best regards, Christoph

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[geometry] weird define in adapted fusion sequence
by alfC 15 Aug '11

15 Aug '11

Hi, Trying (again) to use Boost.Geometry with coordinates with Boost.Units (BTW, what is the status of the compatibility between geometry and units?) I found the following macro definition in boost/ geometry/geometries/adapted/boost_fusion.hpp // Convenience registration macro to bind a Fusion sequence to a CS #define BOOST_GEOMETRY_REGISTER_BOOST_FUSION_CS(CoordinateSystem) \ namespace boost { namespace geometry { namespace traits { \ template <typename Sequence> \ struct coordinate_system \ < \ Sequence, \ typename boost::enable_if \ < \ fusion_adapt_detail::is_fusion_sequence<Sequence> \ >::type \ > \ { typedef cs::cartesian type; }; \ }}} Unless I am missing something, the definition of the macro does not depend on the parameter "CoordinateSystem" !. To make the situation even more confusing the manual's example (http://www.boost.org/doc/ libs/1_47_0/libs/geometry/doc/html/geometry/reference/adapted/ boost_fusion.html) uses the struct as the parameter and not the coordinate system ! Unless I am wrong the last lines of the definition of BOOST_GEOMETRY_REGISTER_BOOST_FUSION_CS should be: { typedef CoordinateSystem type; }; \ }}} and the manual should be updated accordingly. E.g. the example should read BOOST_FUSION_ADAPT_STRUCT(sample_point, (double, x) (double, y) (double, z)) BOOST_GEOMETRY_REGISTER_BOOST_FUSION_CS(cs::cartesian) Am I missing something? Thanks, Alfredo

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