July 2010 - Boost-users - lists.preview.boost.org

Boost link error with mingw
by Eugen Dedu 25 Jul '10

25 Jul '10

Hi everybody, We compile ekiga for windows and boost signals is one of its dependencies, so we need to compile it for windows. I use gcc-mingw32 from debian unstable (gcc configured for mingw, version 4.4.4-0.1) and I do like this: - download boost 1.43.0 - echo "using gcc : : i586-mingw32msvc-gcc : ;" >$(BOOST_DIR)/user-config.jam - cd $(BOOST_DIR); ./bjam $(confboost) with: confboost := --user-config=user-config.jam --layout=system variant=release threading=multi link=shared runtime-link=shared target-os=windows threadapi=win32 --without-math --without-python --without-mpi --without-serialization --without-test --without-thread --without-wave --without-date_time --without-system --without-filesystem --without-graph --without-graph_parallel --without-iostreams --without-program_options --without-regex --without-random -q stage 1. I have a link error: Component configuration: - date_time : not building - filesystem : not building - graph : not building - graph_parallel : not building - iostreams : not building - math : not building - mpi : not building - program_options : not building - python : not building - random : not building - regex : not building - serialization : not building - signals : building - system : not building - test : not building - thread : not building - wave : not building ...patience... ...found 601 targets... ...updating 4 targets... gcc.link.dll bin.v2/libs/signals/build/gcc-mingw-4.4.4/release/target-os-windows/threadapi-win32/threading-multi/libboost_signals.dll.a Creating library file: bin.v2/libs/signals/build/gcc-mingw-4.4.4/release/target-os-windows/threadapi-win32/threading-multi/libboost_signals.dll.abin.v2/libs/signals/build/gcc-mingw-4.4.4/release/target-os-windows/threadapi-win32/threading-multi/trackable.o:trackable.cpp:(.text+0xc): undefined reference to `___gxx_personality_sj0' bin.v2/libs/signals/build/gcc-mingw-4.4.4/release/target-os-windows/threadapi-win32/threading-multi/trackable.o:trackable.cpp:(.text+0x6d): undefined reference to `operator delete(void*)' bin.v2/libs/signals/build/gcc-mingw-4.4.4/release/target-os-windows/threadapi-win32/threading-multi/trackable.o:trackable.cpp:(.text+0xac): undefined reference to `___gxx_personality_sj0' bin.v2/libs/signals/build/gcc-mingw-4.4.4/release/target-os-windows/threadapi-win32/threading-multi/trackable.o:trackable.cpp:(.text+0x10d): undefined reference to `operator delete(void*)' [...] I have discovered that the link can proceed if I do: - echo "using gcc : : i586-mingw32msvc-g++ : ;" >$(BOOST_DIR)/user-config.jam - cd $(BOOST_DIR); ./bjam $(confboost) i.e. compile again after changing gcc to g++, but of course this is a workaround. How to solve it properly? (here is the output after changing to g++: [..] - thread : not building - wave : not building ...patience... ...found 601 targets... ...updating 4 targets... gcc.link.dll bin.v2/libs/signals/build/gcc-mingw-4.4.4/release/target-os-windows/threadapi-win32/threading-multi/libboost_signals.dll.a Creating library file: bin.v2/libs/signals/build/gcc-mingw-4.4.4/release/target-os-windows/threadapi-win32/threading-multi/libboost_signals.dll.a common.copy stage/lib/libboost_signals.dll.a common.copy stage/lib/libboost_signals.dll ...updated 4 targets... ) Second, I execute afterwards: - cd $(BOOST_DIR); ./bjam $(confboost) install 2. Is $(confboost) still needed or not for install? 3. This command does nothing for about 1 minute 30 secs (I thought at the beginning that it simply does not work, fortunately I let it execute more than 10 seconds to see what happens), and only afterwards copy the files. Executing through strace shows many lines like this: brk(0x6116000) = 0x6116000 and these lines take almost all the installation time. Best regards, -- Eugen Dedu

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回复： Multi_indexcomposite_key~~
by isjk 25 Jul '10

25 Jul '10

thanks a lot! now, I have a new problem: Multi_index example 6: complex searches and forergn keys, struct car_manufacturer { std::string name; }; struct car_model { std::string model; car_manufacturer* manufacturer; int price; }; I want use "model, name" to query "price", and I maybe to modify "price". How to do it? thanks. ------------------ 原始邮件 ------------------ 发件人: "Joaquin M Lopez Munoz"<joaquin(a)tid.es>; 发送时间: 2010年7月22日(星期四) 凌晨2:08 收件人: "boost-users"<boost-users(a)lists.boost.org>; 主题: Re: [Boost-users] Multi_indexcomposite_key~~ isjk <isjk <at> foxmail.com> writes: > > hi all, > > now,I have a composite_key like this, > struct leader_key > boost::multi_index::composite_key< > channel_info, > BOOST_MULTI_INDEX_MEMBER(channel_info, boost::uint64_t, st_md5_), > BOOST_MULTI_INDEX_MEMBER(channel_info, boost::uint32_t, st_rank_), > BOOST_MULTI_INDEX_MEMBER(channel_info, boost::uint8_t, st_degrees_), > BOOST_MULTI_INDEX_MEMBER( > channel_info, boost::uint8_t, st_lan_type_) > >{}; > > I used "md5, rank, degrees, lan_type" to query. > I want to the result like this, > equal to md5, > less than rank > degrees from small to large > equal to lan_type You can't do this by issuing a single lookup operation. A composite key on keys k1,...,kn allows you to do lookup operations of the form k1==a1, ... , kj==aj, kj+1==aj+1 k1==a1, ... , kj==aj, kj+1< aj+1 k1==a1, ... , kj==aj, kj+1<=aj+1 k1==a1, ... , kj==aj, kj+1> aj+1 k1==a1, ... , kj==aj, kj+1>=aj+1 For any j in the range [1,n], that is, you can query for the exact value of the first j keys and add any type of inequality for the last key being queried. In your particular case you can rearrange the key extractors of your composite key in the following order md5,lan_type,rank,degress then use lower_bound with elements equal to md5 equal to lan_type less than rank (note you've had to rearrange the extractors in leader_key to be able to do this) which gives you some result "it", and finally manually traverse the range [begin,it) to obtain those elements with degrees from small to large. Hope this helps, Joaquín M López Muoz Telefónica, Investigación y Desarrollo _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

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boost::xpressive - Regex stack space exhausted
by Pavol Supa 25 Jul '10

25 Jul '10

Hi, I need to match a hex-written byte array, optionally separated with spaces. So i tried: boost::xpressive::sregex r = * ( * blank >> repeat<2,2> (xdigit)); smatch match; regex_match (input, match, r); when i use input of approx. 150 hex pairs, i get an exception "Regex stack space exhausted" (i use default stack size by Visual studio 2008) This pattern looks quite simple, so I'd like to know, if there is some fundamental problem with this expressions. I know i can enlarge the stack manually, but i expect the input to be cca 10kB long, depending on user input, so i consider it not being a good solution. Pavol

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[units] inconvent printing of composite scaled units
by alfC 25 Jul '10

25 Jul '10

In the following program, a quantity of fempto*second unit is printed as 0 fs (correctly) but a quantity of composed units composed meter over femptosecond is printed as P( m s^-1) I was expecting: m fs^-1 At first I though it was a bug, where the P is coming from? where the parenthesis is coming from?, but then I realized that P stands for Peta (10e15). is there any workaround? For example an easy way to define fs_unit in some other way such that the f (fempto) keeps attached to the s (second). Below is the example code #include<boost/units/systems/si.hpp> #include<boost/units/make_scaled_unit.hpp> #include<iostream> using namespace boost::units; using namespace std; int main(){ typedef make_scaled_unit<si::time, scale<10, static_rational<-15> > >::type fs_unit; quantity<fs_unit> t(1.*si::second); quantity<si::length> l(1.*si::meter); quantity<divide_typeof_helper<si::length, fs_unit>::type > v = l/t; cout << t << endl; // prints 1e+15 fs cout << l << endl; // prints 1 m cout << v << endl; //prints 1e-15 P(m s^-1), notice the P return 0; }

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Problem with list_of, make_shared and shared_ptr
by alapex0310＠gmail.com 24 Jul '10

24 Jul '10

Hi, I am using boost::list_of to pass a vector of pairs of string + "unsigned char" to SomeClass (as it can be seen in the typedef below - keys_t). This passes the whole vector to SomeClass which copies the vector in the keys_ private variable. The problem is: the copy ctor now copies the full vector in each SomeClass. To prevent this, as you can see, I have defined another data member which is a reference to const keys_t in my class and am initializing it in the member initialization list of the constructor with the value of keys_ and having the copy constructor copy just the reference of keys_ (rkeys_, that is - as you can see in the member initialization list of the copy ctor) instead of the full vector but the new SomeClass then holds an uninitialized vector (keys_) which is ugly and I hate seeing it in the class. Can I possible use Boost::make_shared with boost::list_of to return me a pointer to whatever (vector of type keys_t) boost::list_of returns and store that pointer instead in my class (e.g. keys_t typedef then reflects boost::shared_ptr instead of a traditional pointer) instead of the full vector. Specifying the arbitrary constants (apparently using boost::list_of) right in the constructor call is a requirement. Is there any way I can do it? Of course, I guess I could use boost::make_shared to return me a boost::shared_ptr to keys_t but my code is not even compiling and giving me errors in boost headers: std::vector<std::pair<std::string,unsigned char>> keys_t; class SomeClass { public: SomeClass(std::string nameStr, keys_t keys) : keys_(keys), rkeys_(keys_) {} SomeClass(const SomeClass &koa) : rkeys_(koa.keys_) {} private: keys_t keys_; const keys_t &rkeys_; }; SomeClass *psc = new SomeClass( "MyClass", list_of<pair<string,unsigned char>> ("one", 1) ("two", 2) ("three", 3) ("four", 4) ("five", 5) ("six", 6)); I read in boost::doc that I cannot pass shared_ptr directly as a function argument because of temporary problems. So, I cannot pass a shared_ptr to the constructor of SomeClass and that's the primary reason I hope if you can help me use make_shared or something similar to get the job done. The constraint is: I *must* pass the arbitrary number of pairs of string-unsigned-char in my constructor and that's why I am using list_of. Any way out? -Al

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[asio] clang++ duplicate symbol error when compiling http server2 example
by Dane Springmeyer 24 Jul '10

24 Jul '10

I'm building boost trunk (r64316) using clang++ on mac os x 10.6. The standing library build/install went well, but I hit this error when trying to build one of the boost::asio examples: $ cd libs/asio/example/http/server2 $ ../../../../../bjam toolset=clang [...snip...] clang-darwin.compile.c++ ../../../../../bin.v2/libs/asio/example/http/server2/clang-darwin-2.8/debug/threading-multi/win_main.o clang: warning: argument unused during compilation: '-O0' In file included from win_main.cpp:13: In file included from ../../../../../boost/asio.hpp:20: In file included from ../../../../../boost/asio/basic_datagram_socket.hpp:20: In file included from ../../../../../boost/asio/basic_socket.hpp:19: In file included from ../../../../../boost/asio/basic_io_object.hpp:20: In file included from ../../../../../boost/asio/io_service.hpp:684: In file included from ../../../../../boost/asio/impl/io_service.hpp:18: ../../../../../boost/asio/detail/service_registry.hpp:38:15: warning: unknown pragma ignored [-Wunknown-pragmas] # pragma GCC visibility push (default) ^ ../../../../../boost/asio/detail/service_registry.hpp:47:15: warning: unknown pragma ignored [-Wunknown-pragmas] # pragma GCC visibility pop ^ 2 warnings generated. common.mkdir ../../../../../bin.v2/libs/thread/build/clang-darwin-2.8/debug common.mkdir ../../../../../bin.v2/libs/thread/build/clang-darwin-2.8/debug/threading-multi common.mkdir ../../../../../bin.v2/libs/thread/build/clang-darwin-2.8/debug/threading-multi/pthread clang-darwin.compile.c++ ../../../../../bin.v2/libs/thread/build/clang-darwin-2.8/debug/threading-multi/pthread/thread.o clang: warning: argument unused during compilation: '-O0' clang-darwin.compile.c++ ../../../../../bin.v2/libs/thread/build/clang-darwin-2.8/debug/threading-multi/pthread/once.o clang: warning: argument unused during compilation: '-O0' clang-darwin.link.dll ../../../../../bin.v2/libs/thread/build/clang-darwin-2.8/debug/threading-multi/libboost_thread.dylib common.mkdir ../../../../../bin.v2/libs/system/build/clang-darwin-2.8/debug common.mkdir ../../../../../bin.v2/libs/system/build/clang-darwin-2.8/debug/threading-multi clang-darwin.compile.c++ ../../../../../bin.v2/libs/system/build/clang-darwin-2.8/debug/threading-multi/error_code.o clang: warning: argument unused during compilation: '-O0' clang-darwin.link.dll ../../../../../bin.v2/libs/system/build/clang-darwin-2.8/debug/threading-multi/libboost_system.dylib clang-darwin.link ../../../../../bin.v2/libs/asio/example/http/server2/clang-darwin-2.8/debug/threading-multi/server ld: duplicate symbol __ZN5boost4asio6detail14do_throw_errorERKNS_6system10error_codeE in ../../../../../bin.v2/libs/asio/example/http/server2/clang-darwin-2.8/debug/threading-multi/io_service_pool.o and ../../../../../bin.v2/libs/asio/example/http/server2/clang-darwin-2.8/debug/threading-multi/connection.o clang: error: linker command failed with exit code 1 (use -v to see invocation) "clang++" -o "../../../../../bin.v2/libs/asio/example/http/server2/clang-darwin-2.8/debug/threading-multi/server" "../../../../../bin.v2/libs/asio/example/http/server2/clang-darwin-2.8/debug/threading-multi/connection.o" "../../../../../bin.v2/libs/asio/example/http/server2/clang-darwin-2.8/debug/threading-multi/io_service_pool.o" "../../../../../bin.v2/libs/asio/example/http/server2/clang-darwin-2.8/debug/threading-multi/mime_types.o" "../../../../../bin.v2/libs/asio/example/http/server2/clang-darwin-2.8/debug/threading-multi/posix_main.o" "../../../../../bin.v2/libs/asio/example/http/server2/clang-darwin-2.8/debug/threading-multi/reply.o" "../../../../../bin.v2/libs/asio/example/http/server2/clang-darwin-2.8/debug/threading-multi/request_handler.o" "../../../../../bin.v2/libs/asio/example/http/server2/clang-darwin-2.8/debug/threading-multi/request_parser.o" "../../../../../bin.v2/libs/asio/example/http/server2/clang-darwin-2.8/debug/threading-multi/server.o" "../../../../../bin.v2/libs/asio/example/http/server2/clang-darwin-2.8/debug/threading-multi/win_main.o" "../../../../../bin.v2/libs/thread/build/clang-darwin-2.8/debug/threading-multi/libboost_thread.dylib" "../../../../../bin.v2/libs/system/build/clang-darwin-2.8/debug/threading-multi/libboost_system.dylib" -g Does anyone have suggestions or workarounds? Thanks, Dane

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Extracting uBLAS from boost
by JohnnyRep 24 Jul '10

24 Jul '10

Hi! I am new to boost and I am mainly interested in the uBLAS library. As far as I understood it should be possible to extract that module with BCP and build it later on with BJAM?! I) So I downloaded the newest boost release. II) $ bcp uBLAS config build ~/workspace/libs/uBLAS Which seemed to be successful. At least I got all the expected folders to the chosen destination. I also got a boost-build.jam in my directory, so I tried a simple III) $ bjam toolset=gcc Which leads to: error: error: no Jamfile in current directory found, and no target references specified. May be I did that all in the wrong way, but there's no real HOWTO out there (especially for the last step). Hope someone can help me out!? Many thanks! J.R. -- View this message in context: http://old.nabble.com/Extracting-uBLAS-from-boost-tp29250085p29250085.html Sent from the Boost - Users mailing list archive at Nabble.com.

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Boost services
by Bo Jensen 24 Jul '10

24 Jul '10

I have a small business which uses boost quite a lot, thanks for all the great code. I am missing some features at the moment. Is it either possible to donate to get some things done or does some qualified people offer such services for a fee ? More specifically I would like to see the doxygen integration being expanded.

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[geometry] periodic boundary conditions
by alfC 24 Jul '10

24 Jul '10

Hi, I am starting to investigate the boost.geometry library. One of the applications I have already for it is in the context of particle simulations. I still have not much idea of the architecture of the library but it seem very powerful. So for example I was wondering if geometry has facilities for distances and points living in 3D periodic boundary conditions. Topologically it is a torus but with euclidean distance. If somebody could point where to look I will appreciate it. Thank you, Alfredo

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Re: [Boost-users] [boost] Phoenix3 port to proto complete
by Ahmed Charles 23 Jul '10

23 Jul '10

> > std::bind and boost::bind are both monomorphic. phoenix::bind is > polymorphic! Would you (or anyone else) mind explaining polymorphic vs monomorphic in this context? Or point to an explanation? Thanks.

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