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Build error 1.46
by gast128 23 Feb '11

23 Feb '11

Hello all, I got a build error when building Boost 1.46 on Visual Studio 2003 (MSVC 7.1) in Boost.Fusion: compile-c-c++ bin.v2\libs\math\build\msvc-7.1\debug\pch-off\threading-multi\asso c_legendre.obj assoc_legendre.cpp boost\fusion\sequence\comparison\less_equal.hpp(49) : error C2039: 'is_native_fu sion_sequence' : is not a member of 'boost::fusion::detail' boost\fusion\sequence\comparison\less_equal.hpp(49) : error C2065: 'is_native_fu sion_sequence' : undeclared identifier boost\fusion\sequence\comparison\less_equal.hpp(49) : error C2974: 'boost::disab le_if' : invalid template argument for 'Cond', type expected boost\utility\enable_if.hpp(59) : see declaration of 'boost::disable_if' Anyone?

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issues having upgraded to 1.46
by Sean Farrow 23 Feb '11

23 Feb '11

Hi: Having upgraded and build 1.46, I'm getting the error: 1>LINK : fatal error LNK1104: cannot open file 'libboost_system-vc100-mt-gd-1_45.lib' Can someone tell me where the linking is controlled, I've done a search in the entire boost directory, but carn't find where this could be happening! I'm using the boost.filesystem library, and elements boost::system::error_code from boost.system. Anyone give me some pointers! Cheers Sean.

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Conditions for casting stream_buffer to std::basic_streambuf
by Tyler Weston 22 Feb '11

22 Feb '11

Hi All, How do you construct an std::ostream from a boost::iostreams::stream_buffer<io::back_insert_device<...> > ? Is this not possible with a simple sink_tag for the category? I'm using libpng and want to abstract writing to a file directly or to a memory buffer. libpng provides hooks for write and flush functions, and never seeks. I implemented these functions for std::ostream and it works great for file writing. My assumption that it would be trivial to provide a std::ostream to a memory buffer turned out to be incorrect. Unfortunately type information is lost through libpng as you have to pass your io data as void*, which makes using templatized stream classes difficult. In the tutorial for iostreams it says: "The template io::streamis provided as a convenience. It's always possibly to avoid io::stream and simply use io::stream_buffer together with one of the standard library stream templates." I tried following this pattern, and it works great for files: io::file_sink sink(filename, std::ios_base::out | std::ios_base::trunc | std::ios_base::binary); io::stream_buffer<io::file_sink> streamBuf(sink); std::ostream pngStream(&streamBuf); However, I am having problems providing an ostream for the memory buffer case. shared_ptr<vector<char> > vec(new vector<char>()); io::back_insert_device<vector<char> > sink(*vec); io::stream_buffer<io::back_insert_device<vector<char> > > streamBuf(sink); std::ostream pngStream(&streamBuf); This snippet produces the following error in msvc 9 with boost 1.45. 2>error C2664: 'std::basic_ostream<_Elem,_Traits>::basic_ostream(std::basic_streambuf<_Elem,_Traits> *,bool)' : cannot convert parameter 1 from 'boost::iostreams::stream_buffer<T> *' to 'std::basic_streambuf<_Elem,_Traits> *' 2> with 2> [ 2> _Elem=char, 2> _Traits=std::char_traits<char> 2> ] 2> and 2> [ 2> T=boost::iostreams::back_insert_device<std::vector<char>> 2> ] 2> and 2> [ 2> _Elem=char, 2> _Traits=std::char_traits<char> 2> ] 2> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast I noticed file_sink::category has more tags than back_insert_device::category, so I took the container_device in the tutorial and implemented all the tags that file_sink has, and still get the same error. Digging farther I see that basic_file::impl contains an actual std::basic_filebuf which can be casted to basic_streambuf. The basic_filebuf is private member of a private member, so shouldn't be accessible for normal casting and I don't see the cast explicitly provided. How does the file_sink to basic_streambuf cast work? How can I implement this cast for container_device without inheriting and overriding all of the methods of basic_streambuf? Is there an abstract parent class to boost::iostreams::stream or stream_buffer that allows for polymorphism to ease the pain of the required void* cast? I'm still relatively new to metaprogramming patterns. As a side note, the tutorial continues to suggest default-constructing a std::ostream, which is not possible at least with msvc's std implementation.

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[Thread] Interrupting a thread causes a segmentation fault
by W Frane 22 Feb '11

22 Feb '11

Hello, I'm new to the Boost libraries and I've been attempting to implement basic multithreading using the Boost Thread library. I'm currently experiencing a problem: when I interrupt a thread my program crashes with a segmentation fault. I've done quite a bit of research on the internet regarding this problem and, although similar problems have been reported before, none of the solutions have worked for me (a number of people have indicated that interrupts work when linking with the static library, just not with the dynamic library, but I was using the static library to begin with). Technical details are: Boost version: 1.45.0 Compiler: MinGW 4.4.1 IDE: Code Blocks 10.05 The build log output from Code Blocks is: mingw32-g++.exe -Wall -fexceptions -g -I"C:\Program Files\boost\boost_1_45_0" -c "C:\Documents and Settings\WFrane\My Documents\C++ code\boost thread interrupt test\boost_thread_interrupt_test\main.cpp" -o obj\Debug\main.o mingw32-g++.exe -L"C:\Program Files\boost\boost_1_45_0\stage\lib" -o bin\Debug\boost_thread_interrupt_test.exe obj\Debug\main.o "C:\Program Files\boost\boost_1_45_0\stage\lib\libboost_thread-mgw44-mt-d-1_45.a" (I've also tried a release build with the appropriate version of the Boost.Thread library and the resulting program experiences the same problem.) I've included a short program below that exhibits this problem. Any suggestions as to what might be causing this and how it could be resolved would be appreciated. Regards, W. Frane EXAMPLE CODE: #define BOOST_THREAD_USE_LIB // This line was necessary to link with the static libraries. #include #include using namespace std; boost::mutex mutexCout; void testingThread(){ try{ while(1){ boost::this_thread::interruption_point(); } } catch(boost::thread_interrupted const& e){ // Thread was interrupted. mutexCout.lock(); cout << "THREAD: Ending." << endl; mutexCout.unlock(); } catch(...){ mutexCout.lock(); cout << "THREAD: Unknown exception." << endl; mutexCout.unlock(); } } int main(int argc, char* argv[]) { boost::thread testThread(testingThread); mutexCout.lock(); cout << "MAIN: Created thread; sleeping now." << endl; mutexCout.unlock(); boost::this_thread::sleep(boost::posix_time::seconds(4)); mutexCout.lock(); cout << "MAIN: About to interrupt thread." << endl; mutexCout.unlock(); testThread.interrupt(); // Segmentation fault occurs around here during program execution. mutexCout.lock(); cout << "MAIN: Sent interrupt to thread." << endl; mutexCout.unlock(); testThread.join(); cout << "MAIN: Thread has ended." << endl; return 0; }

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Re: [Boost-users] [boost] Boost release 1.46.0 available
by Daniel James 22 Feb '11

22 Feb '11

On 22 February 2011 14:50, KTC <ktc(a)ktchan.info> wrote: > I thought the download link to boost jam is going to be removed from the > front page from this release on so there's no more "Bjam shows all kind of > errors when I tried to build boost"? I don't know what's happening with that. I asked on the build list a little while ago and got no response. If the separate download is no longer current, then it probably also means that the build and jam documentation on the site are out of date. I really do need people to either change these things themselves or let me know what to do. I can't keep up with everything. Daniel

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failed linking boost w/ my code (mac os x snow leo, g++ 4.21)
by ny 22 Feb '11

22 Feb '11

On Tue, Feb 22, 2011 at 3:31 PM, ny <> wrote: > Hi, > > I'm a boost user, but right now I fail testing some code through Netbeans > IDE (and yes I 've posted there as well). > The inclusion w/ the foreach.hpp I need fails -> warning: > boost/foreach.hpp: No such file or directory. > > I 've added #include <boost/foreach.hpp> in my code, > export > PATH=$PATH:/opt/local/var/macports/software/boost/1.45.0_1/opt/local/include > > (installed via macports) in my path but it fails. > > Note that linking by adding the > -I /opt/local/var/macports/software/boost/1.45.0_1/opt/local/include > directive from cmd line is possible. > (and by the way I've been told that the path given above is an > intermediate directory of macports, not the proper one... > I am not sure about this, all other libs I use installed via macports work > just fine with a single path inclusion). > Back to the Netbeans issue, I 've added the Boost include path to Code > Assistance >> C++ > and at least the unresolved symbols in the IDE disappeared > > I'm on mac os x snow leo, g++ 4.21. > thanks for any pointers > > Nikos Yiotis > Chat Skype: nyiotis > Contact Me [image: Linkedin]<http://my.wisestamp.com/link?u=ws7c27w2vnrx4d2b&site=www.linkedin.com/in/yi…> > > > >

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Re: [Boost-users] [boost] Boost release 1.46.0 available
by Beman Dawes 22 Feb '11

22 Feb '11

On Tue, Feb 22, 2011 at 8:33 AM, Sergey Zubkovsky <sergzub(a)gmail.com> wrote: > http://www.boost.org/users/download/version_1_46_0 > > Not Found > > The requested URL /users/download/version_1_46_0.html was not found on this > server. Seems to be working now. Thanks, Daniel --Beman

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Re: [Boost-users] [boost] Boost release 1.46.0 available
by Daniel James 22 Feb '11

22 Feb '11

On 22 February 2011 13:11, Jeff Flinn <TriumphSprint2000(a)hotmail.com> wrote: > FYI - the website 1.46 docs link points to 1.45 docs Sorry about that, it's fixed now.

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[regex] link problem with MSVC
by Thomas Mang 22 Feb '11

22 Feb '11

HI, I had built boost version 1.40 (some time ago) myself with MSVC 2008 Express, a complete build. I now wanted to use the regex library; I left the default option of statically linking it in (no #define BOOST_REGEX_DYN_LINK) and also count on auto-linking (no BOOST_REGEX_NO_LIB). Using regex_search, I keep getting linker errors: Error 1 error LNK2019: unresolved external symbol "__declspec(dllimport) public: void __thiscall std::_Container_base::_Orphan_all(void)const " (__imp_?_Orphan_all@_Container_base@std@@QBEXXZ) referenced in function "public: class std::vector<struct boost::sub_match<char const *>,class std::allocator<struct boost::sub_match<char const *> > > & __thiscall std::vector<struct boost::sub_match<char const *>,class std::allocator<struct boost::sub_match<char const *> > >::operator=(class std::vector<struct boost::sub_match<char const *>,class std::allocator<struct boost::sub_match<char const *> > > const &)" (??4?$vector@U?$sub_match@PBD@boost@@V?$allocator@U?$sub_match@PBD@boost@@@std@@@std@@QAEAAV01@ABV01@@Z) libboost_regex-vc90-mt-gd-1_40.lib Error 2 error LNK2019: unresolved external symbol "__declspec(dllimport) public: __thiscall std::_Container_base::~_Container_base(void)" (__imp_??1_Container_base@std@@QAE@XZ) referenced in function "public: __thiscall std::_Vector_val<struct boost::sub_match<char const *>,class std::allocator<struct boost::sub_match<char const *> > >::~_Vector_val<struct boost::sub_match<char const *>,class std::allocator<struct boost::sub_match<char const *> > >(void)" (??1?$_Vector_val@U?$sub_match@PBD@boost@@V?$allocator@U?$sub_match@PBD@boost@@@std@@@std@@QAE@XZ) libboost_regex-vc90-mt-gd-1_40.lib and some more others. Me doing something wrong or a boost issue ? I tried to disable auto-linking and specifiy the lib (libboost_regex-vc90-mt-gd-1_40.lib for debug build) myself but it does not seem to link it in statically (wants the DLL on startup). many thanks and best, Thomas

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[BGL] Determining the properties bundle type
by Shaun Jackman 22 Feb '11

22 Feb '11

Hi, What's the best way to determine the properties bundle type? G::vertex_bundled vertex_bundle_type<G>::type property_map_value<G, vertex_bundle_t> I'm trying to determine the type that will be returned by g[u] where g is a graph and u is a vertex_descriptor. Thanks, Shaun

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