September 2008 - Boost-users - lists.preview.boost.org

[test] How to ignore a signal?
by Boris 19 Sep '08

19 Sep '08

I've a test case which receives the SIGCHLD signal on Solaris. Boost.Test catches it and prints an error message although in that test case SIGCHLD s perfectly fine. How do I make Boost.Test ignore this signal? I found BOOST_NO_SIGNAL_HANDLING back in Boost.Test 1.33.1 but it doesn't seem to exist anymore in 1.36.0? Boris

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[test] memory access violation by calling <<-operator
by M. Siebeneicher 18 Sep '08

18 Sep '08

Hi boost-users, I created a class and overload the <<-operator. Now I tried to test them by assigning an instance of the class to an ostringstream, but I get always the error: "fatal error in "EmptyVertex_output_stream": memory access violation occurred at address 0xcccccce0, while attempting to read inaccessible data" It's very curious, because assigning a string directly to the ostringstream, no error occurs. I'm using boost 1.35.0 and VS2003 The code: // test_class.cpp BOOST_AUTO_TEST_CASE( EmptyVertex_output_stream) { // 1 // const string vertexNameIn1 = "test name"; const EmptyVertex emptyVertex1(vertexNameIn1); ostringstream currString1; currString1 << emptyVertex1; // Error occurs here, see class_to_test.cpp string expString1 = "EmptyVertex(name=test name)"; BOOST_CHECK_EQUAL(currString1.str(), expString1); } //class_to_test.cpp /*public friend*/ ostream& operator<<(ostream& streamOut, const EmptyVertex& vertex) { streamOut << "EmptyVertex("; // Error occurs here streamOut << vertex.getName(); streamOut << ")"; return streamOut; } Can someone give me a clue? greetz, modbom -- Ist Ihr Browser Vista-kompatibel? Jetzt die neuesten Browser-Versionen downloaden: http://www.gmx.net/de/go/browser

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Re: [Boost-users] offtopic: std C++ / STL / boost-friendly UI framework?
by Jim Bell 18 Sep '08

18 Sep '08

>> This is a bit of an offtopic question, but I wonder if there are any / if >> there will be any standard C++ / STL / boost friendly UI frameworks? > > However wxWidgets version 3 may be. They are considering > incorporating stl / boost among other things. Keep your eye on Wascana: wxWidgets with a WYSIWYG screen builder, built on Eclipse. http://wascana.sourceforge.net/ Eclipse is great, though I haven't used wxWidgets or Wascana. -Jim

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[interprocess]files locations for mutex and named shm
by Eugen Stoianovici 18 Sep '08

18 Sep '08

the default location for named mutexes and named shared memory is %ROOT%\Documents and Settings\%USER%\Local Settings\Temp\boost_interprocess\... How can i change it? Thanks

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[boost-users][logging] limiting/truncation the output file
by Igor R 18 Sep '08

18 Sep '08

Hello, I know the above library is not a part of the boost yet, but probably some of you had an experience with it. I log to a text file. What I need is to ensure that the file doesn't exceed some maximal size. For the sake of simplicity, I'd like just to re-create the file when it grows to much. I guess I may not just delete it externally, as it's managed by the logger. So how can I tell the logger to delete the file? (Ideally, I'd like to "scroll" the data in the file like in a queue - first in first out, but I guess it's impossible, isn't it?) Thank you, Igor'.

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Re: [Boost-users] static reflection
by James Pritts 18 Sep '08

18 Sep '08

Sorry for top posting here, but I didn't receive Steven's response. I'm using i686-apple-darwin9-gcc-4.0.1 (GCC) 4.0.1 (Apple Inc. build 5488). The compile error I get is the following: g++ -I/Users/jpritts/trunk/LIFEBLAST_HOME/i386-darwin-gcc-4_0/vendor/Boost/include main.cc -o a.out main.cc: In instantiation of 'DoesVisitorImplement<Derived, void, float>': main.cc:47: instantiated from here main.cc:22: error: '&Base::operator()' is not a valid template argument for type 'void (Derived::*)(float)' because it is of type 'void (Base::*)(float)' main.cc:22: note: standard conversions are not allowed in this context Thanks, Jimmy. AMDG James Pritts wrote: > On a boost thread a while ago, I saw some code to query for the > existence of a member function of a class using SFINAE and > BOOST_STATIC. I guess you could call it static reflection. Below is > a code snippet that does not work using the aforementioned methods. > The culprit is the using Base::operator() statement in the Derived > class. Apparently the base class method void operator()(float u) is > not part of the type of Derived. This was a shock to me, because you > can call the overloaded method from the derived class. I'd appreciate > any advice on how to check for the existence of member functions in > this scenario. I fear it may be impossible. Thanks! > You can convert a member function pointer of a derived class to a member function pointer of a derived class, so it ought to work. What compiler are you using? I get 1 1 Using msvc 9.0. In Christ, Steven Watanabe

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Which version?
by Robert Jones 18 Sep '08

18 Sep '08

I've found a boost distribution in the build at work. How can I determine which release it is? - Rob.

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is it safe to upgrade from 1.35 to 1.36?
by frederic.bron＠alcan.com 18 Sep '08

18 Sep '08

Since 1.36 is out, I have seen so many messages concerning troubles with 1.36 that I did not dare to upgrade. What is the status of 1.36? Regards F. Bron Avis : Ce message et toute pièce jointe sont la propriété d'Alcan et sont destinés seulement aux personnes ou à l'entité à qui le message est adressé. Si vous avez reçu ce message par erreur, veuillez le détruire et en aviser l'expéditeur par courriel. Si vous n'êtes pas le destinataire du message, vous n'êtes pas autorisé à utiliser, à copier ou à divulguer le contenu du message ou ses pièces jointes en tout ou en partie. Notice: This message and any attachments are the property of Alcan and are intended solely for the named recipients or entity to whom this message is addressed. If you have received this message in error please inform the sender via e-mail and destroy the message. If you are not the intended recipient you are not allowed to use, copy or disclose the contents or attachments in whole or in part.

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[program_options] Problem using value<string>()->zero_tokens() with config file
by Marcio Paim de Aquino 18 Sep '08

18 Sep '08

Hi, I have the following code section: po::options_description config; config.add_options() ( "HOST", po::value<string>(&host) ) ( "USER", po::value<string>(&user) ) ( "PASSWD", po::value<string>(&passwd) ) ( "DATABASE", po::value<string>(&database) ) ( "PORT", po::value<int>(&port) ) ( "VERTEX.WEIGHT", po::value<string>()->zero_tokens() ); po::variables_map vm; ifstream ifs( "myfile.conf" ); store( parse_config_file( ifs, config ), vm ); notify( vm ); If in myfile.conf I leave WEIGHT blank like this [VERTEX] WEIGHT = I get the following error message: terminate called after throwing an instance of 'boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<boost::program_options::invalid_syntax> >' what(): no value given in 'WEIGHT =' Aborted Someone can tell whats is wrong? Thanks Marcio

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Re: [Boost-users] dynamic link error: boost::program_options::arg not found (Sebastian Hauer)
by Vial, Florent 18 Sep '08

18 Sep '08

Hi Sebastian and Ovanes, I am facing the same problems as you with linking to boost::program_options, and boost::system too. In all my win32 projects (I use msvc9.0), I define BOOST_DYN_LIB using a common property sheet. It compiles just fine with 1.36.0 but it does not link. I also specify BOOST_LIB_DIAGNOSTIC so that I can see what boost auto link is trying to do. May be I should say that I built my boost 1.36.0 libraries on Win32 (Windows XP Professional SP3) using following command line: ./bjam.exe toolset=msvc --build-type=complete --build-dir="D:\tmp" --threading=multi --runtime-link=static,shared --prefix="C:\boost1.36" install --without-mpi --without-python --without-wave When I compile my project (some libraries using boost_filesystem and boost_system, some not), I can see in the compiler output: Linking to lib file: boost_filesystem-vc90-mt-1_36.lib Linking to lib file: boost_system-vc90-mt-1_36.lib When I compile my main : #include <iostream> #include <boost/program_options.hpp> namespace po = boost::program_options; int main(int argc, char **argv) { int ret = 0; po::variables_map vm; po::options_description all("Allowed options"); try { po::options_description general("General options"); general.add_options() ("help,h", "Show this message and exit.") ("version,v", "Output version information and exit."); po::options_description optional("Optional options"); optional.add_options() ("optional,o", po::value<std::string>(), "Optional") ("optional2,p", po::value<std::string>(), "Optional2"); all.add(general).add(optional); po::store(po::parse_command_line(argc, argv, all), vm); po::notify(vm); } catch (const po::invalid_command_line_syntax &badsyntax) { /* My log error with badsyntax*/ ret = -1; } catch (const po::unknown_option &badoption) { /* My log error with badoption*/ ret = -2; } catch (const po::error &err) { /* My log error with err*/ ret = -3; } if (vm.count("optional")) { std::string optionalParam = vm["optional"].as<std::string>(); /** Handling optionalParam ... */ } if (vm.count("optional2")) { std::string optionalParam2 = vm["optional2"].as<std::string>(); /** Handling optionalParam2 ... */ } if (vm.count("help")) { std::cout << all << std::endl; return 0; } return ret; } with following command line: /O2 /Ob2 /Oy /I all-my-includes-here /I "../../../../boost/include/boost-1_36" /D "BOOST_PROGRAM_OPTIONS_DYN_LINK" /D "UNICODE" /D "NDEBUG" /D "BOOST_LIB_DIAGNOSTIC" /D "BOOST_SYSTEM_DYN_LINK" /D "BOOST_FILESYSTEM_DYN_LINK" /D "BOOST_THREAD_DYN_LINK" /D "NOMINMAX" /D "WIN32_LEAN_AND_MEAN" /D "WIN32" /D "_WINDOWS" /D "_CRT_NONSTDC_NO_WARNINGS" /D "_CRT_SECURE_NO_WARNINGS" /D "_CRT_SECURE_NO_DEPRECATE" /D "_CRT_NONSTDC_NO_DEPRECATE" /FD /EHsc /MD /GS- /arch:SSE2 /Fo"./../../Release/MyApp/" /Fd"./../../Release/MyApp/vc90.pdb" /W3 /nologo /c /TP /wd4100 /wd4290 /errorReport:prompt -EHsc -Zm200 -w34100 -w34189 -w34189 I can see in the compiler output following lines: Linking to lib file: boost_program_options-vc90-mt-1_36.lib ../../../../boost/include/boost-1_36\boost/program_options/errors.hpp(21) : warning C4275: non dll-interface class 'std::logic_error' used as base for dll-interface class 'boost::program_options::error' > C:\Programme\MicrosoftVisualStudio9.0\VC\include\stdexcept(21) : see declaration of 'std::logic_error' > ../../../../boost/include/boost-1_36\boost/program_options/errors.hpp(21) : see declaration of 'boost::program_options::error' >../../../../boost/include/boost-1_36\boost/program_options/errors.hpp(61) : warning C4251: 'boost::program_options::ambiguous_option::alternatives' : class 'std::vector<_Ty>' needs to have dll-interface to be used by clients of class 'boost::program_options::ambiguous_option' > with > [ > _Ty=std::string > ] [snip a lot of similar warnings] Then, linking with following command line /OUT:"../../Release\MyApp.exe" /INCREMENTAL /NOLOGO /LIBPATH:"../../Release" /LIBPATH:"..\..\..\..\boost/lib/vc90" /MANIFEST /MANIFESTFILE:"../../Release/MyApp\MyApp.exe.intermediate.manifest" /MANIFESTUAC:"level='asInvoker' uiAccess='false'" /NODEFAULTLIB:"libcpmt.lib" /NODEFAULTLIB:"libcmt.lib" /SUBSYSTEM:CONSOLE /DYNAMICBASE:NO /MACHINE:X86 /ERRORREPORT:PROMPT msvcrt.lib msvcprt.LIB binmode.obj kernel32.lib user32.lib netapi32.lib Iphlpapi.lib Ws2_32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib I get following errors: Memain.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: void __thiscall boost::program_options::detail::cmdline::set_additional_parser(class boost::function1<struct std::pair<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > >,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &>)" (__imp_?set_additional_parser@cmdline@detail@program_options@boost@@QAEXV?$function1@U?$pair@V?$basic_string@DU?$char_traits@D@std@@V?$alloc ator@D@2@@std@@V12@@std@@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@2@@4@@Z) referenced in function "public: class boost::program_options::basic_command_line_parser<char> & __thiscall boost::program_options::basic_command_line_parser<char>::extra_parser(class boost::function1<struct std::pair<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > >,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &>)" (?extra_parser@?$basic_command_line_parser@D@program_options@boost@@QAEAAV123@V?$function1@U?$pair@V?$basic_string@DU?$char_traits@D@std@@V? $allocator@D@2@@std@@V12@@std@@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@2@@3@@Z) 1>metiscalibrationdata.lib(MetisMatrixCalibration_io.obj) : error LNK2019: unresolved external symbol "class boost::system::error_category const & __cdecl boost::system::get_generic_category(void)" (?get_generic_category@system@boost@@YAABVerror_category@12@XZ) referenced in function "void __cdecl boost::system::`dynamic initializer for 'generic_category''(void)" (??__Egeneric_category@system@boost@@YAXXZ) error LNK2019: unresolved external symbol "__declspec(dllimport) class boost::system::error_category const & __cdecl boost::system::get_generic_category(void)" (__imp_?get_generic_category@system@boost@@YAABVerror_category@12@XZ) referenced in function "void __cdecl boost::system::`dynamic initializer for 'generic_category''(void)" (??__Egeneric_category@system@boost@@YAXXZ) 1>filesystem.lib(FileUtils.obj) : error LNK2001: unresolved external symbol "__declspec(dllimport) class boost::system::error_category const & __cdecl boost::system::get_generic_category(void)" (__imp_?get_generic_category@system@boost@@YAABVerror_category@12@XZ) 1>filesystem.lib(FileUtils.obj) : error LNK2019: unresolved external symbol "__declspec(dllimport) class boost::system::error_code boost::filesystem::detail::throws" (__imp_?throws@detail@filesystem@boost@@3Verror_code@system@3@A) referenced in function "void __cdecl boost::filesystem::remove<class boost::filesystem::basic_path<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,struct boost::filesystem::path_traits> >(class boost::filesystem::basic_path<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,struct boost::filesystem::path_traits> const &,class boost::system::error_code &)" (??$remove@V?$basic_path@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@Upath_traits@filesystem@boost@@@filesystem@boost@@@fi lesystem@boost@@YAXABV?$basic_path@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@Upath_traits@filesystem@boost@@@01@AAVerror _code@system@1@@Z) When I open boost\include\boost-1_36\boost\program_options\detail\cmdline.hpp I can see BOOST_PROGRAM_OPTIONS_DECL declared as __declspec(dllimport) when compiling my application. When I open boost\include\boost-1_36\boost\system\error_code.hpp, I can see BOOST_SYSTEM_DECL declared as __declspec(dllimport) as well. So my question (at last!) is: how can I check if those symbols were properly exported when building boost ? thank you, Cheers, Florent ---------------------------------------------------------------------- Message: 1 Date: Wed, 17 Sep 2008 13:21:41 -0400 From: "Sebastian Hauer" <sebastian.hauer(a)gmail.com> Subject: Re: [Boost-users] dynamic link error: boost::program_options::arg not found To: boost-users(a)lists.boost.org Message-ID: <fb92d9f00809171021k8c0cf93i75f67b9564281852(a)mail.gmail.com> Content-Type: text/plain; charset=ISO-8859-1 Hello Ovanes, thanks for the reply. I fixed it. I eventually found your posting and tried your suggestion attributing boost::program_options::arg with an additional __declspec(selectany) but either I did something wrong or things are different with msvc-8.0 it did not work for me. Instead I went down a different path and got rid of the global arg variable altogether. Since nothing seems to write into it and the value is always copied it seemed like a reasonable thing to do considering it causes so much grief with the linking. Once this was fixed I got another linker error: error LNK2001: unresolved external symbol "public: static unsigned int const boost::program_options::options_description::m_default_line_length" (?m_default_line_length@options_description@program_options@boost@@2IB) I found the solution to that one from this posting from Evert at http://archives.free.net.ph/message/20080815.085344.d72efb54.en.html . Once I changed the declaration of the class static const m_default_line_length to: BOOST_STATIC_CONSTANT (unsigned, m_default_line_length = 80); With these two changes in place all compiled and linked without a problem. Below I've inlined the patch of my changes against the original boost_1_36_0 source as reference for other people running into this issue. If these changes seem like a good idea to others perhaps they could be included with the next boost release. Regards, Sebastian

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