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Design for extensibility
by Tim St. Clair 07 Sep '07

07 Sep '07

Folks - I have found that there are several classes in boost, namely the OS constructs (thread, mutex, etc.) do not provide me w/some of the features I'm looking for (and that is ok with me). As an embedded developer I deal with all kinds of operating systems which are not in the main stream, however C++ is very common in the embedded world, and is growing. With that note, I would like to assert the following: - It would be "uber-useful" to design OS constructs, or libraries for that matter, with extensibility in mind. By providing a couple of guidelines, developers could then port to any OS under the sun, or add the features they desire. Instead, I'm left with writing yet another wrapper (ohh joy). Cheers, -Tim

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Boost compiling problem
by Bernard Marnaud 07 Sep '07

07 Sep '07

Hi, I tried to installed the Metaproxy with make on solaris 9, but i have some errors due to Boost library. The YAZ and YAZPP libraries are installed successfully. The Boost compilation (bjam --build-dir=/usr/local/Boost --toolset=gcc stage) gives the following linkage errors: ...failed gcc.link.dll /opt/Boost/boost/bin.v2/libs/program_options/build/gcc-3.4.6/release/threading-multi/libboost_program_options-gcc34-mt-1_34_1.so.1.34.1... ...failed gcc.link.dll /opt/Boost/boost/bin.v2/libs/filesystem/build/gcc-3.4.6/release/threading-multi/libboost_filesystem-gcc34-mt-1_34_1.so.1.34.1... ...failed gcc.link.dll /opt/Boost/boost/bin.v2/libs/graph/build/gcc-3.4.6/release/threading-multi/libboost_graph-gcc34-mt-1_34_1.so.1.34.1... ... You can see below the output of Meataproxy compilation (./configure" '--with-yazpp=/usr/local/src/yazpp-1.0.3/) : ./configure --with-yazpp=/usr/local/src/yazpp-1.0.3/ Make Making all in xml make[1]: Entering directory `/usr/local/src/metaproxy-1.0.11/xml' Making all in schema make[2]: Entering directory `/usr/local/src/metaproxy-1.0.11/xml/schema' make[2]: Nothing to be done for `all'. make[2]: Leaving directory `/usr/local/src/metaproxy-1.0.11/xml/schema' Making all in xslt make[2]: Entering directory `/usr/local/src/metaproxy-1.0.11/xml/xslt' make[2]: Nothing to be done for `all'. make[2]: Leaving directory `/usr/local/src/metaproxy-1.0.11/xml/xslt' make[2]: Entering directory `/usr/local/src/metaproxy-1.0.11/xml' make[2]: Nothing to be done for `all-am'. make[2]: Leaving directory `/usr/local/src/metaproxy-1.0.11/xml' make[1]: Leaving directory `/usr/local/src/metaproxy-1.0.11/xml' Making all in src make[1]: Entering directory `/usr/local/src/metaproxy-1.0.11/src' make all-am make[2]: Entering directory `/usr/local/src/metaproxy-1.0.11/src' /bin/bash ../libtool --tag=CXX --mode=link g++ -pthread -I/usr/local/src/boost_1_34_1 -g -O2 -L/usr/local/src/boost_1_34_1/stage/lib /usr/local/src/yazpp-1.0.3/src/libyazpp.la /usr/local/src/yaz-3.0.10/src/libyaz.la -L/usr/local/lib -R/usr/local/lib -lxslt -lxml2 -lz -lpthread -liconv -lsocket -lnsl -lm -lsocket -lnsl -liconv -lpthread -o metaproxy metaproxy_prog.o libmetaproxy.la -lm -ldl g++ -pthread -I/usr/local/src/boost_1_34_1 -g -O2 -o .libs/metaproxy metaproxy_prog.o -L/usr/local/src/boost_1_34_1/stage/lib -L/sol10/SOURCES/S9/gcc-3.4.6/objdir/sparc-sun-solaris2.9/libstdc++-v3/src -L/sol10/SOURCES/S9/gcc-3.4.6/objdir/sparc-sun-solaris2.9/libstdc++-v3/src/.libs -L/sol10/SOURCES/S9/gcc-3.4.6/objdir/gcc -L/usr/local/lib -L/usr/lib -L/usr/openwin/lib -L/usr/local/ssl/lib -L/usr/local/BerkeleyDB.4.2/lib ./.libs/libmetaproxy.so /usr/local/src/yazpp-1.0.3/src/.libs/libyazpp.so /usr/local/src/yaz-3.0.10/src/.libs/libyaz.so /usr/local/lib/libxslt.so /usr/local/lib/libxml2.so -lz -lsocket -lnsl /usr/local/lib/libiconv.so -lpthread /usr/local/lib/libstdc++.so -lm -ldl -Wl,-R -Wl,/usr/local/lib g++: unrecognized option `-pthread' ld: warning: file /usr/local/lib/libstdc++.so: attempted multiple inclusion of file Undefined first referenced symbol in file boost::program_options::invalid_option_value::invalid_option_value(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)metaproxy_prog.o boost::program_options::positional_options_description::add(char const*, int)metaproxy_prog.o boost::program_options::validation_error::what() constmetaproxy_prog.o boost::detail::condition_impl::notify_all() ./.libs/libmetaproxy.so boost::lock_error::~lock_error() ./.libs/libmetaproxy.so boost::lock_error::lock_error() ./.libs/libmetaproxy.so boost::detail::condition_impl::notify_one() ./.libs/libmetaproxy.so boost::program_options::options_description_easy_init::operator()(char const*, boost::program_options::value_semantic const*, char const*)metaproxy_prog.o boost::program_options::detail::cmdline::run() metaproxy_prog.o boost::xtime_get(boost::xtime*, int)./.libs/libmetaproxy.so typeinfo for boost::program_options::validation_errormetaproxy_prog.o vtable for boost::program_options::validation_errormetaproxy_prog.o boost::program_options::detail::cmdline::set_options_description(boost::program_options::options_description const&)metaproxy_prog.o boost::thread_group::add_thread(boost::thread*) ./.libs/libmetaproxy.so boost::program_options::detail::cmdline::set_positional_options(boost::program_options::positional_options_description const&)metaproxy_prog.o boost::program_options::notify(boost::program_options::variables_map&)metaproxy_prog.o boost::program_options::store(boost::program_options::basic_parsed_options<char> const&, boost::program_options::variables_map&, bool)metaproxy_prog.o boost::program_options::detail::cmdline::cmdline(std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const&)metaproxy_prog.o boost::mutex::~mutex() ./.libs/libmetaproxy.so boost::mutex::mutex() ./.libs/libmetaproxy.so boost::mutex::do_lock(boost::mutex::cv_state&)./.libs/libmetaproxy.so boost::thread_group::join_all() ./.libs/libmetaproxy.so typeinfo for boost::program_options::value_semantic_codecvt_helper<char>metaproxy_prog.o boost::program_options::to_internal(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)metaproxy_prog.o boost::thread::sleep(boost::xtime const&)./.libs/libmetaproxy.so boost::program_options::options_description::options_description(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, unsigned int)metaproxy_prog.o boost::program_options::abstract_variables_map::operator[](std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) constmetaproxy_prog.o boost::program_options::arg metaproxy_prog.o boost::mutex::do_unlock() ./.libs/libmetaproxy.so boost::program_options::value_semantic_codecvt_helper<char>::parse(boost::any&, std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const&, bool) constmetaproxy_prog.o boost::program_options::operator<<(std::basic_ostream<char, std::char_traits<char> >&, boost::program_options::options_description const&)metaproxy_prog.o boost::program_options::options_description_easy_init::operator()(char const*, char const*)metaproxy_prog.o boost::thread_group::~thread_group()./.libs/libmetaproxy.so boost::thread_group::thread_group() ./.libs/libmetaproxy.so boost::program_options::options_description::add_options() metaproxy_prog.o typeinfo for boost::lock_error ./.libs/libmetaproxy.so boost::detail::condition_impl::~condition_impl()./.libs/libmetaproxy.so boost::detail::condition_impl::condition_impl()./.libs/libmetaproxy.so boost::detail::condition_impl::do_wait(_pthread_mutex*) ./.libs/libmetaproxy.so boost::mutex::do_unlock(boost::mutex::cv_state&)./.libs/libmetaproxy.so boost::program_options::variables_map::variables_map()metaproxy_prog.o boost::thread::thread(boost::function0<void, std::allocator<boost::function_base> > const&)./.libs/libmetaproxy.so boost::mutex::do_lock() ./.libs/libmetaproxy.so vtable for boost::program_options::variables_mapmetaproxy_prog.o boost::program_options::positional_options_description::positional_options_description()metaproxy_prog.o ld: fatal: Symbol referencing errors. No output written to .libs/metaproxy collect2: ld returned 1 exit status make[2]: *** [metaproxy] Error 1 make[2]: Leaving directory `/usr/local/src/metaproxy-1.0.11/src' make[1]: *** [all] Error 2 make[1]: Leaving directory `/usr/local/src/metaproxy-1.0.11/src' make: *** [all-recursive] Error 1 Could you investigate why the compilation doesn't work ? Do you need more informations ? Thans for your cooperation. Best regards. Stéphan. _________________________________________________________________ A la recherche d'un ami d'enfance ? Peut-être est-il dans la liste d'amis de vos amis ! http://spaces.live.com/default.aspx?page=Ed01&ss=True

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Boost way of disabling compiler warnings?
by Christian Henning 07 Sep '07

07 Sep '07

Hi there, I just questioned myself if boost is providing some general way of disabling warning for specific compilers. Something like: BOOST_DISABLE_WARNING( MSVC71, 4675 ); BOOST_DISABLE_WARNING( GCC34, 1234 ); I think that would be cool to have. Regards, Christian

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Boost function question.
by Surya Kiran Gullapalli 07 Sep '07

07 Sep '07

Hello, I'm having the following class structure. template <class T> class TemplatedClass { TemplatedClass () { member = shared_ptr<T> (CreateA()) ; } private: shared_ptr<T> member ; operator->() { return T.get() ; } } ; class BasePlugin { virtual void foo (void) = 0 ; } class DerivedPlugin_A : public BasePlugin { virtual void foo (void) { cout << "FOO in derived A" << endl ;} } ; DerivedPlugin_A* CreateA () { return new DerivedPlugin_A ; } TemplatedClass <BasePlugin> t ; t->foo() ; How do i write a boost::function wrapper for t->foo() ; Please help. Thanks in advance, Surya

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[Boost.Build] installation problem bis
by david shaw 06 Sep '07

06 Sep '07

Hi, ok, I've added new lines to the email: I go there http://www.boost.org/doc/html/jam/building.html I do:C:\Documents and Settings\src\boost\tools\jam\src>build mingw --debug (like explained) A new folder named bin.ntx86.debug is added after I go there http://www.boost.org/doc/html/bbv2/installation.html : 1:(done) 2:I do:C:\Documents and Settings\src\boost\tools\build\v2> bjam --version Instead of seing:Boost.Build V2 (Milestone 11)Boost.Jam 03.1.14 I see:syntax error at EOFBoost.Build V2 (Milestone 11)Boost.Jam 03.1.14 3:I open the user-config.jam file (like explained) and I modify the file, the modification is the following: import toolset : using gcc ; # GCC configuration # Configure gcc (default version) using gcc : : "C:\mingw\bin\g++" ; 4:I copy bjam.exe from C:\Documents and Settings\src\boost\tools\build\v2 to C:\Documents and Settings\src\boost\tools\build\v2\example\hello and I run bjam (like explained): C:\Documents and Settings\src\boost\tools\build\v2\example\hello>bjam I get the following message: C:\Documents and Settings\src\boost\tools\build\v2\kernel\modules.jam:280 :in modules.importIMPORT error:rule gcc unknown in module "toolset." ... ...... ... Where is my error(4)? Thanks, David _________________________________________________________________ Créez un blog Messenger pour partager facilement toutes vos photos de vacances ! http://www.windowslive.fr/spaces/default.asp

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Question about pool.
by 蹬三轮的 06 Sep '07

06 Sep '07

We use boost pool in our project and we found boost's pool may occupy too much memory. Say, if we need a block of memory which size is 1317B, boost's pool will allocate a truck of memory 5268B on a 32bits platform, leave 3951 bytes unused (it get worse on 64bits platform). I don't think it is necessary to allocate 5268B, for the sake of performance, only 1320B is enough for align. It should be resovled because pool is so important to many large application.

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Creating graph type at runtime
by Abhishek V 06 Sep '07

06 Sep '07

Hi Currently i m creating adjacency_list in this format . typedef adjacency_list < vecS, vecS, undirectedS, property < vertex_name_t, std::string >, property < edge_name_t, std::string > > Graph; Graph g; Now user will decide whether the graph is directed or undirected and accordingly i will create the adjancency_list. undirectedS or directedS . Is there any representation which can help me out in this case or suggest me a way by which this can be done.. Thanks Abhishek Vyas Tata Consultancy Services Mailto: abhishek.v(a)tcs.com Website: http://www.tcs.com ____________________________________________ Experience certainty. IT Services Business Solutions Outsourcing ____________________________________________ =====-----=====-----===== Notice: The information contained in this e-mail message and/or attachments to it may contain confidential or privileged information. If you are not the intended recipient, any dissemination, use, review, distribution, printing or copying of the information contained in this e-mail message and/or attachments to it are strictly prohibited. If you have received this communication in error, please notify us by reply e-mail or telephone and immediately and permanently delete the message and any attachments. Thank you

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Want to calculate different parameters for a graph
by Abhishek V 06 Sep '07

06 Sep '07

Hi I want to calculate the center, radius,diameter,rank,nullity,girth,circumference for a graph. I have created an adjancency list with the help of boost. Is there any function or components avaliable in BGL which can give me all or any of these parameters. Thanks Abhishek Vyas Tata Consultancy Services Mailto: abhishek.v(a)tcs.com Website: http://www.tcs.com ____________________________________________ Experience certainty. IT Services Business Solutions Outsourcing ____________________________________________ =====-----=====-----===== Notice: The information contained in this e-mail message and/or attachments to it may contain confidential or privileged information. If you are not the intended recipient, any dissemination, use, review, distribution, printing or copying of the information contained in this e-mail message and/or attachments to it are strictly prohibited. If you have received this communication in error, please notify us by reply e-mail or telephone and immediately and permanently delete the message and any attachments. Thank you

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[xpressive] CVS: Spurious warnings on #include <boost/xpressive/xpressive.hpp>
by Bryan Donlan 06 Sep '07

06 Sep '07

When building with -W -Wall, including <boost/xpressive/xpressive.hpp> produces a number of spurious warnings. GCC version: gcc version 4.1.3 20070831 (prerelease) (Ubuntu 4.1.2-16ubuntu1) Boost version: CVS (regression from 1.34.1) --- test program (build with -W -Wall) --- #include <boost/xpressive/xpressive.hpp> int main() { return 0; } --- end --- --- warning output --- bcvs/boost/boost/xpressive/regex_primitives.hpp:142: warning: missing initializer for member 'boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::args0<boost::xpressive::detail::epsilon_matcher>, 0l>::arg0' bcvs/boost/boost/xpressive/regex_primitives.hpp:149: warning: missing initializer for member 'boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::args0<boost::xpressive::detail::epsilon_matcher>, 0l>::arg0' bcvs/boost/boost/xpressive/regex_primitives.hpp:276: warning: missing initializer for member 'boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::args0<boost::xpressive::detail::assert_bos_matcher>, 0l>::arg0' bcvs/boost/boost/xpressive/regex_primitives.hpp:287: warning: missing initializer for member 'boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::args0<boost::xpressive::detail::assert_eos_matcher>, 0l>::arg0' bcvs/boost/boost/xpressive/regex_primitives.hpp:295: warning: missing initializer for member 'boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::args0<boost::xpressive::detail::assert_bol_placeholder>, 0l>::arg0' bcvs/boost/boost/xpressive/regex_primitives.hpp:303: warning: missing initializer for member 'boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::args0<boost::xpressive::detail::assert_eol_placeholder>, 0l>::arg0' bcvs/boost/boost/xpressive/regex_primitives.hpp:311: warning: missing initializer for member 'boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::args0<boost::xpressive::detail::assert_word_placeholder<boost::xpressive::detail::word_begin> >, 0l>::arg0' bcvs/boost/boost/xpressive/regex_primitives.hpp:319: warning: missing initializer for member 'boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::args0<boost::xpressive::detail::assert_word_placeholder<boost::xpressive::detail::word_end> >, 0l>::arg0' bcvs/boost/boost/xpressive/regex_primitives.hpp:329: warning: missing initializer for member 'boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::args0<boost::xpressive::detail::assert_word_placeholder<boost::xpressive::detail::word_boundary<true> > >, 0l>::arg0' bcvs/boost/boost/xpressive/regex_primitives.hpp:377: warning: missing initializer for member 'boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::args0<boost::xpressive::detail::logical_newline_placeholder>, 0l>::arg0' bcvs/boost/boost/xpressive/regex_primitives.hpp:386: warning: missing initializer for member 'boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::args0<boost::xpressive::detail::any_matcher>, 0l>::arg0' bcvs/boost/boost/xpressive/regex_primitives.hpp:395: warning: missing initializer for member 'boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::args0<boost::xpressive::detail::self_placeholder>, 0l>::arg0' bcvs/boost/boost/xpressive/regex_primitives.hpp:412: warning: missing initializer for member 'boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::args0<boost::xpressive::detail::set_initializer>, 0l>::arg0' --- end output ---

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(newbie) Cannot find: "norm_inf_index" in the UBLAS lib
by Jim.Zhang＠ubs.com 06 Sep '07

06 Sep '07

Hi, Got a problem using UBLAS. On Vector operations, "norm_inf" works fine, however "norm_inf_index" does not work, "norm_inf_index": identifier not found. I have included the following headers: #include <boost\numeric\ublas\matrix.hpp> #include <boost\numeric\ublas\vector.hpp> #include <boost\numeric\ublas\io.hpp> #include "boost/shared_ptr.hpp" #include "boost/tuple/tuple.hpp" #include <boost/numeric/ublas/matrix_proxy.hpp> Am I missing some specific header file? Does anyone else ever have the similar problem? Thank you for your attention. Visit our website at http://www.ubs.com This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately by e-mail if you have received this e-mail by mistake and delete this e-mail from your system. E-mails are not encrypted and cannot be guaranteed to be secure or error-free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. The sender therefore does not accept liability for any errors or omissions in the contents of this message which arise as a result of e-mail transmission. If verification is required please request a hard-copy version. This message is provided for informational purposes and should not be construed as a solicitation or offer to buy or sell any securities or related financial instruments. UBS Limited is a company registered in England & Wales under company number 2035362, whose registered office is at 1 Finsbury Avenue, London, EC2M 2PP, United Kingdom. UBS AG (London Branch) is registered as a branch of a foreign company under number BR004507, whose registered office is at 1 Finsbury Avenue, London, EC2M 2PP, United Kingdom. UBS Clearing and Execution Services Limited is a company registered in England & Wales under company number 03123037, whose registered office is at 1 Finsbury Avenue, London, EC2M 2PP, United Kingdom.

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