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Boost 1.38.0 and gcc 4.3.2
by Brian Webb 26 Apr '09

26 Apr '09

I'm trying to build the boost libraries on Ubuntu 8.10 with gcc-4.3.2, and it's a mess! I think there are more failed compiles than there are successes. Is there something that I'm missing, or is this currently unsupported? This is the compile command that I'm using: bjam --toolset=gcc --prefix=$PREFIX --layout=system --user-config=`pwd`/user-config.jam stage This is user-config.jam: using gcc : : g++ : <compileflags>-I/swl/ix86-linux/include <linkflags>-L/swl/ix86-linux/lib ; using mpi ; Any pointers would be appreciated. Thanks, Brian

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How to detect the presence of a particular type of constructor?
by Siegfried Kettlitz 25 Apr '09

25 Apr '09

Hello, what i like to do, is to detect the presence of a particular type of constructor for a class in a template. It is possible to use template overloading to detect the presence of members or member functions (like with::some_func(int) ), but since it is not possible(?) to take a pointer to a constructor ( like with::with(int) ), this method does not work to detect the present types of the templated class T. Consider this pseudocode: struct with { with( int ); } struct without { without( void ); } template<typename T> T* do_construct() { a) return new T(int) if T::T(int) present; b) return new T() if T::T(int) not present; } int main( void ) { do_construct<with>(); do_construct<without>(); } So far i did not find anything useful in type_traits to make the do_construct-function work without modifying the classes (adding inheritance or some static member). Does anyone know another possibility to do this, or is it not possible using the current standard of c++? Regards, Siegfried Kettlitz

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undefined reference to `__sync_fetch_and_add_4'
by Birju Prajapati 24 Apr '09

24 Apr '09

Hi, I built boost 1.38 as so: bjam architecture=x86 address-model=32 --stagedir=stage32 --with-filesystem --with-thread --with-signals --with-serialization --with-system --with-program_options --with-date_time stage Copied the files over to /usr/local/lib32: sudo cp stage32/lib/* /usr/local/lib32/ Compiled object files, eg: g++ -m32 -c -g -D_LINUX -I. -I/opt/sts_vendor/onix-eurex/include -I/usr/local/include/boost-1_38 -MMD -MP -MF build/Debug/GNU-Linux-x86/reference/ReferenceData.o.d -o build/Debug/GNU-Linux-x86/reference/ReferenceData.o reference/ReferenceData.cpp Then linking does not work: g++ -m32 -o dist/Debug/GNU-Linux-x86/spreadx build/Debug/GNU-Linux-x86/multicast/MulticastChannel.o build/Debug/GNU-Linux-x86/reference/ReferenceData.o build/Debug/GNU-Linux-x86/reference/Strategy.o build/Debug/GNU-Linux-x86/executor/MessageExecutor.o build/Debug/GNU-Linux-x86/multicast/MulticastSelector.o build/Debug/GNU-Linux-x86/fast/FIXStreamSubscriber.o build/Debug/GNU-Linux-x86/reference/Product.o build/Debug/GNU-Linux-x86/spreadx.o build/Debug/GNU-Linux-x86/fast/FIXMessage.o build/Debug/GNU-Linux-x86/multicast/Message.o build/Debug/GNU-Linux-x86/fast/FastDecoder.o build/Debug/GNU-Linux-x86/reference/Outright.o -L/opt/sts_vendor/onix-eurex/lib -L/usr/tibco/tibrv/lib -L/usr/local/lib32 -lffCppFixEngine -lACE -lcrypto -lboost_serialization-gcc43-mt -lboost_system-gcc43-mt -lboost_thread-gcc43-mt /usr/local/lib32/libboost_serialization-gcc43-mt.so: undefined reference to `__sync_fetch_and_add_4' I've tried #define BOOST_SP_USE_PTHREADS in user.hpp, I've tried -march=i486, but neither works. What gives? My platform details: birju@xx:~$ g++ --version g++ (Ubuntu 4.3.2-1ubuntu12) 4.3.2 Copyright (C) 2008 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. birju@xx:~$ uname -a Linux xx 2.6.27-11-generic #1 SMP Wed Apr 1 20:53:41 UTC 2009 x86_64 GNU/Linux birju@xx:~$ Cheers, Birju Schneider Trading 4th Floor, 25 Copthall Avenue London EC2R 7BP -------------------------------------------------------- Message from: Birju.Prajapati(a)schneidertrading.com Message to: boost-users(a)lists.boost.org Attached files: 0 This e-mail and any files transmitted with it are confidential, may be legally privileged, and are for the sole use of the intended recipient. Copyright in this e-mail and any accompanying document created by us is owned by us. If you are not the intended recipient of this e-mail or any part of it please telephone our IT Department at the number shown above or by e-mail at info(a)schneidertrading.com. You should not use or disclose to any other person the contents of this e-mail or its attachments (if any), nor take copies. This e-mail is not a representation or warranty and is not intended nor should it be taken to create any legal relations, contractual or otherwise. Schneider Trading Associates Ltd (Registration No. 3692131) is incorporated in England and Wales and the registered office is at 25 Copthall Avenue, London EC2R 7BP. The company is authorised and regulated by the Financial Services Authority

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BoostCon 2009 Registrar's Report
by Kim Scheibel 24 Apr '09

24 Apr '09

I'm very happy to report that, despite the current economic climate, we currently have a very solid number of confirmed registrations for BoostCon 2009. 84 registrations to be precise, of which 6 were registered in the last two days alone. You still have time to register at the discounted price of USD599 at http://www.boostcon.com/registration, on or before Apr. 26th. After that, the fee is USD699. Best regards, Kim Scheibel BoostCon 2009 Registrar

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[signals] maximum combiner example calls slot twice
by Dominique Devienne 24 Apr '09

24 Apr '09

In http://www.boost.org/doc/libs/1_38_0/doc/html/signals/tutorial.html, once I read: "The input iterators passed to the combiner transform dereference operations into slot calls" I realized that the maximum<T> combiner introduced earlier is implemented using: if (max_value < *first) max_value = *first; Which ends up calling the slot twice. In this case it's harmless since the slot has no side effect, but it may not be a good example to follow, or maybe it should be pointed out a little later when the combiner deref statement quoted above is made. Just my $0.02. Thanks, --DD

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How to use mpl::for_each with mpl::map
by Mark 24 Apr '09

24 Apr '09

Hi, I'm trying to use the runtime mpl::for_each algorithm on an mpl::map that I have which associates enumerated values to various types. I want to be able to call a functor for each of the enumerated key values in the mpl::map but can't get the syntax right, I get the following compiler error with MSVC 9.0 c:\source\vendor\boost\1_38_0\boost\mpl\pair.hpp(43) : error C2039: 'first' : is not a member of 'boost::mpl::arg<1>' Any help appreciated. Mark. #include <iostream> #include <string> #include <boost/mpl/map.hpp> #include <boost/mpl/at.hpp> #include <boost/mpl/for_each.hpp> #include <boost/mpl/key_type.hpp> namespace mpl = boost::mpl; enum FieldId { Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday, _DaysInWeek }; // Map of enumerated types typedef mpl::map < mpl::pair< mpl::int_< Monday >, mpl::identity< int > >, mpl::pair< mpl::int_< Tuesday >, mpl::identity< std::string > >, mpl::pair< mpl::int_< Wednesday >, mpl::identity< int > >, mpl::pair< mpl::int_< Thursday >, mpl::identity< __int64 > >, mpl::pair< mpl::int_< Friday >, mpl::identity< char > >, mpl::pair< mpl::int_< Saturday >, mpl::identity< bool > >, mpl::pair< mpl::int_< Sunday >, mpl::identity< int > > > _day_field_types; // Returns the type for the associated enumeration template< int FIELD_ID > struct FieldTypeT : mpl::at< _day_field_types, mpl::int_< FIELD_ID > >::type {}; // Prints value struct printer { template< typename T > void operator()( const T& x ) { std::cout << x << std::endl; } }; int main() { // Print the associated type for the 'Tuesday' enumeration std::cout << typeid( FieldTypeT< Tuesday >::type ).name() << std::endl;; // Print the list of enumerations mpl::for_each< _day_field_types, mpl::key_type< mpl::map<>, mpl::_1 > >( printer() ); // Compiler error! }

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bjam - unable to generate "libboost_system-vc80-mt-gd-1_39.lib"
by Raja Koduru 24 Apr '09

24 Apr '09

Hi, I am new to boost. I compiled boost using bjam without giving any command line options. I was trying to run a simple asio's timer1.cpp tutorial given on the boost website. It failed with the error "LINK : fatal error LNK1104: cannot open file 'libboost_system-vc80-mt-gd-1_39.lib'" Looked in <BoostRootDir>\bin.v2 directory. There were library files with the format "libboost_system-vc80-mt-1_39.lib" My question is .. What other options needs to be given to bjam to generate suitable libs with "-gd" in the library name. ? "bjam's --help" has not helped on how to fine tune it. Please advice. with thanks & regards, raja koduru

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Re: [Boost-users] Boost.Test error in Xcode debug build
by DeNigris Sean 24 Apr '09

24 Apr '09

>Can you give more details on your OS/compiler setup? Is it GCC version? >What version of Boost r u using? What usage variant of Boost.Test? Sure gcc 4.0.1 (Apple) Boost 1.38 Variant: libboost_unit_test_framework-xgcc40-mt-1_38.dylib > Can you post simplest example here. #define BOOST_TEST_MODULE example #include <boost/test/included/unit_test.hpp> // ____________________________________________________________________________ // BOOST_AUTO_TEST_CASE( free_test_function ) { BOOST_CHECK( true /* test assertion */ ); } > What is the value of id? What os the value of res? > You mean if line, right? Yes, correct. Sean DeNigris sean(a)clipperadams.com

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Ideas for something that looks like metaprogramming
by John Dlugosz 24 Apr '09

24 Apr '09

I'm revamping my atomic_counter template (see < http://www.dlugosz.com/Repertoire/refman/Classics/atomic_counter_whitepa per.html#toptop>) and plan on exposing all the available "magic" (e.g. things you can't do in C++) op-codes in the atomic read-modify-write department, as primitives. Then, use those in the template class. But, I have gained a deeper appreciation for some of the LOCKable instructions I never thought were interesting. For example, you can LOCK ADD, which changes the value in memory but doesn't return back what it was or became. What good is that? Directly translating to C++, none at all. But... you do get back some information. In assembly language, you see the flags. So, a thread can add something to the location, and although doesn't know what it became in general, at least know if this thread is the one that made it zero. Or, overflowed, or whatever. Those flags are the basis of if-statements in assembly language. So, given primitive calls that return the whole set of flags, it occurs to me to be able to harness that with a metaprogramming-like interface. For example, I'm hesitant to implement something called operator &= that doesn't return the new value, but "something else" instead. I think the only interesting flag here is whether the result is zero. So bool operator&=(left,right) returning whether the result was non-zero would be very confusing, even if it did work right when used in an 'if' condition! So, just brainstorming, x&=y would return something not directly usable, but does work with an overloaded ==, so if you were to write (x&=y)==0 the result would be what you expect from C++. Maybe it's not worth the effort. But if anyone wants to discuss it... --John (sorry about the footer; it's not my idea) TradeStation Group, Inc. is a publicly-traded holding company (NASDAQ GS: TRAD) of three operating subsidiaries, TradeStation Securities, Inc. (Member NYSE, FINRA, SIPC and NFA), TradeStation Technologies, Inc., a trading software and subscription company, and TradeStation Europe Limited, a United Kingdom, FSA-authorized introducing brokerage firm. None of these companies provides trading or investment advice, recommendations or endorsements of any kind. The information transmitted is intended only for the person or entity to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipient is prohibited. If you received this in error, please contact the sender and delete the material from any computer.

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[interprocess] Shared memory compile problem
by Po-Chun 23 Apr '09

23 Apr '09

I am a new user and try to write some codes with shared memory using boost.interprocess. Basically, I followed the examples and the allocation seems fine. But the use of shared-memory container gave me a bunch of error messages related to "instantiated from here." during compile. The error seems related to the template. But I have no idea how to fix it yet. Any suggestion would be helpful. Thanks. Po-Chun My code: struct LongIntLess { bool operator()(const uint64_t a, const uint64_t b) { return a < b; } }; main () { using namespace boost::interprocess; try{ shared_memory_object::remove("SharedMemory"); managed_shared_memory segment (create_only, "SharedMemory", sizeof (uint64_t)*200); typedef allocator< uint64_t, managed_shared_memory::segment_manager> shmAllocator_t; typedef set<uint64_t, shmAllocator_t> shrSet_t; const shmAllocator_t alloc_inst (segment.get_segment_manager()); shrSet_t *WrSet_1; WrSet_1 = segment.construct<shrSet_t> ("shrSet_t") ("LongIntLess", alloc_inst); // <= not sure about this // Is it right way to construct a set ? WrSet_1->insert(2); // <====== This line causes the error } catch (...){ shared_memory_object::remove("SharedMemory"); throw(); } shared_memory_object::remove("SharedMemory"); } The error messages are from these files: boost/interprocess/containers/ detail/tree.hpp: boost/intrusive/detail/tree_algorithms.hpp boost/intrusive/rbtree.hpp boost/interprocess/containers/detail/tree.hpp boost/interprocess/containers/set.hpp One of the error messges is like: tree.hpp:331: instantiated from 'bool boost::interprocess::detail::rbtree<Key, Value, KeyOfValue, KeyCompare, A>::key_node_compare<KeyValueCompare>::operator()(const KeyType&, const typename boost::interprocess::detail::node_alloc_holder<A, typename boost::interprocess::detail::intrusive_rbtree_type<A, boost::interprocess::detail::value_compare_impl<Key, Value, KeyCompare, KeyOfValue> >::type>::Node&) const [with KeyType = long unsigned int, KeyValueCompare = boost::interprocess::detail::value_compare_impl<long unsigned int, long unsigned int, boost::interprocess::allocator<long unsigned int, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index> >, boost::interprocess::detail::identity<long unsigned int> >, Key = long unsigned int, Value = long unsigned int, KeyOfValue = boost::interprocess::detail::identity<long unsigned int>, KeyCompare = boost::interprocess::allocator<long unsigned int, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index> >, A = std::allocator<long unsigned int>]'

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using offset_ptr
by Rex Battenberg 23 Apr '09

23 Apr '09

Hi, I am having trouble using offset_ptr. I want to dynamically allocate memory in windows shared memory and create a point to it so it can be used by two different processes. I figures I would create a named object in the shaed memory to contain the pointer to the memmory, but when I try it I get a compile error. Here is the code I have so far. Note the the the shared memory is created elsewhere and it is big enough. bip::managed_windows_shared_memory* pAldisSharedMemory = new bip::managed_windows_shared_memory(bip::open_only, ALDIS_SHARED_MEMORY_NAME.c_str()); if (pAldisSharedMemory) { bip::offset_ptr<char> pImageData; // // This line causes the following error. Error 1 error C2440: 'initializing' : cannot convert from //' //boost::interprocess::offset_ptr<PointedType> *' to 'char *' //C:\stopbar\3rdParty\boost\include\boost\interprocess\offset_ptr.hpp 111 AldisHardware // pImageData = pAldisSharedMemory->find_or_construct<bip::offset_ptr<char>>("ImageData")(); // char * *pImageData = pAldisSharedMemory->find_or_construct<char *>("ImageData")(); if (pImageData == NULL) { // // This value will be unuseable by other processes, need to use an offset_ptr here, but I have not figured // out yet how to make them work. // pImageData = (char *)pAldisSharedMemory->allocate(1280 * 860 * 3); } I have really no idea what is wrong or how to do this. If anybody has any examples, that would be great. Thanks Rex

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Re: [Boost-users] regular expression problems
by John Maddock 23 Apr '09

23 Apr '09

> Sorry, but this strays a little from actual boost. Since there are a > handful of you that are probably using regex, I was hoping someone could > help with syntax. > > I have a regex that validates a latitude format. > > > > These are the restrictions: > > Must have an N or S as first letter. > > It can be all values from 0.0 to 90.0 > > My first shot at it confirmed format, but not data constraints: > "(N|S)\\d{2}\\.\\d{1,6} <file:///\\d%7b2%7d\d%7b1,6%7d> " > > But any attempts to limit the constraints caused an exception in regex. > Is > there something wrong w/ how I formatted this: > "(N|S)(9[0]\\.0{1-6}|[0-8]\\d\\.\\d{1-6} > <file:///\\.0%7b1-6%7d|[0-8]\d\d%7b1-6%7d> )" > > > > To me, it reads: 1st char must be N|S > > If second char is 9, the next chars must be 0.0 through 0.000000 > > Else > > If char is 0-8, then the next just has to be digits [0-9].[0-9]{1-6} > > > > Can anyone tell me what I am doing wrong? There are no numeric constraints available in the regular expression language, and the {} operator are for constrained repeats with 1{1-6} not being a valid syntax. How about something like: (N|S)\\d(\\.\\d+|[1-8](\\.\\d+)?|9(\\.0+)?)? HTH, John.

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[asio] Named pipes on Windows?
by Allen Cronce 23 Apr '09

23 Apr '09

Hi all, I'm working on a cross platform server daemon. Clients communicate with the daemon using boost asio. For the posix implementation, it's convenient and appropriate in our case to use Unix domain sockets. I've experimented with the related asio "local" sample code and verified that it will work for our purposes. For Windows it looks like named pipes are sort of the equivalent of Unix domain sockets. But while asio has a "stream_handle" interface that accepts a Windows handle, all of the sample and test code passes invalid handles. I haven't found any working sample or test code that specifically integrates named pipes with asio. All I've found so far is an email to this list on March 13th from Andrew Solodovnikov who was having problems getting named pipes to work with asio. Has anyone successfully used asio and Windows named pipes? If so, would you be willing to share some sample code that demonstrates the functionality? Thanks in advance. Best, -- Allen Cronce

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[tuple][fusion] Creating tuple type from function type
by Jeremiah Willcock 23 Apr '09

23 Apr '09

I would like to take a given function type and create a (Fusion or Boost) tuple with its parameter types as members. This would be straightforward to do with function_types and Fusion, but I would also like to add a separate tag to each tuple type. For example, I would like to do the following: struct tag1 {}; struct tag2 {}; typedef tagged_function_tuple<tag1, void(int, double)>::type t1; typedef tagged_function_tuple<tag2, void(int, double)>::type t2; and have t1 and t2 be distinct types, each equivalent to fusion::vector<int, double> (or some kind of tuple<int, vector>). In particular, I would like to use the nice constructor syntax to allow things like t1(1, 2.5) to work, with as nice error messages as possible when incorrect argument counts or types are used. I would also like to "hide" the tags in the type, so just creating fusion::vector<tag1, int, double> would not be ideal. Is there a way to do this? Otherwise, I assume I can copy-and-paste the code for fusion::tuple and modify it to add a tag. Is that the recommended way? Thank you for your help. -- Jeremiah Willcock

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Build and Install only a Specified Library from command line using bjam (newbie!)
by Agnel C J Kurian 23 Apr '09

23 Apr '09

Hi, I've been trying to build and install selected Boost libraries (regex, graph, program options) from the command line (MS VC9 Express) using the --with-library option of bjam. However I find that bjam copies headers for all boost libraries to the target location. How do I build and install only the specified library and it's headers? The same problem has been discussed by another user here: http://stackoverflow.com/questions/439402/building-a-subset-of-boost-in-win…

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regular expression problems
by Green, Jason M NSWCDL, W33 23 Apr '09

23 Apr '09

Sorry, but this strays a little from actual boost. Since there are a handful of you that are probably using regex, I was hoping someone could help with syntax. I have a regex that validates a latitude format. These are the restrictions: Must have an N or S as first letter. It can be all values from 0.0 to 90.0 My first shot at it confirmed format, but not data constraints: "(N|S)\\d{2}\\.\\d{1,6} <file:///\\d%7b2%7d\d%7b1,6%7d> " But any attempts to limit the constraints caused an exception in regex. Is there something wrong w/ how I formatted this: "(N|S)(9[0]\\.0{1-6}|[0-8]\\d\\.\\d{1-6} <file:///\\.0%7b1-6%7d|[0-8]\d\d%7b1-6%7d> )" To me, it reads: 1st char must be N|S If second char is 9, the next chars must be 0.0 through 0.000000 Else If char is 0-8, then the next just has to be digits [0-9].[0-9]{1-6} Can anyone tell me what I am doing wrong? Just FYI, I am coding in VS 2005 C++ Thanks

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Boost Thread with own Callback implementation
by programmine 23 Apr '09

23 Apr '09

I am using boost::thread for starting a member function of an object in a seperate thread. This works for an example like this: ProcessData *data = new ProcessData(); ProcessManager *pm = new ProcessManager(); boost::thread t1(&ProcessManager::start, boost::ref(pm), data); Unfortunately I am not using the ProcessManager directly but a Controller which uses a self implemented callback functionality. It looks like this: typedef Callback1 startProcessingEvent; startProcessingEvent::Signal onStartProcessing; The ProcessManager is binded to this event and I could call the method like myController->onStartProcessing(data); so in the end the ProcessManager->start is called through the Controller. If I know want to run the same thing in a separate thread I cannot just do this: boost::thread t1(&Controller::onStartProcessing, boost::ref(myController), data); because boost does not understand the whole callback thing. Does anyone has an idea how to solve the problem? Thanks -- View this message in context: http://www.nabble.com/Boost-Thread-with-own-Callback-implementation-tp23193… Sent from the Boost - Users mailing list archive at Nabble.com.

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identity_property_map
by Andreas Fabri 23 Apr '09

23 Apr '09

Hello, Are the code and the documentation of the identity_property_map in sync. The documentation says that the class identity_property_map has a template member function operator[](T t) that for any type T, just returns t. In the .hpp file though I find //========================================================================= // A property map that applies the identity function to integers struct identity_property_map : public boost::put_get_helper<std::size_t, identity_property_map> { typedef std::size_t key_type; typedef std::size_t value_type; typedef std::size_t reference; typedef boost::readable_property_map_tag category; inline value_type operator[](const key_type& v) const { return v; } }; Best regards, andreas

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Compiling Boost with PGI
by Ruediger Berlich 23 Apr '09

23 Apr '09

Hi there, I am trying to port my heavily Boost-based application to different compiler(-versions) . I was successful with Intel and various Linux-based gcc versions so far. Now I am trying my luck with the Portland group compiler in version 8. Corresponding compiler support seems to be available in Boost: ./tools/build/v2/tools/pgi.jam ./boost/config/compiler/pgi.hpp A "./configure --with-toolset=pgi" succeeds. The subsequent make, however, results in a plethora of error messages such as the following: gcc.compile.c++ bin.v2/libs/math/build/gcc/release/threading-multi/nextafter.o /bin/sh: line 1: -ftemplate-depth-128: command not found -ftemplate-depth-128 -O3 -finline-functions -Wno-inline -Wall -pthread -fP IC -DBOOST_ALL_NO_LIB=1 -DBOOST_MATH_TR1_DYN_LINK=1 -DNDEBUG -I"." -c -o "bin. v2/libs/math/build/gcc/release/threading-multi/nextafter.o" "libs/math/build/../ src/tr1/nextafter.cpp" Looking into the pgi configuration files makes it appear as if the pgi support isn't finished yet. E.g. pgi.jam has a commented-out line # flags pgi.compile OPTIONS <threading>multi : -mt ; Indeed, pgCC does not accept this switch: $ pgCC -mt pgCC-Error-Unknown switch: -mt The above error message also makes it appear as if gcc options (e.g. "-Wall -pthread") are passed to pgCC. Can anyone comment on the status of PGI support by Boost ? The above happens on a system whose /etc/redhat-release states "Scientific Linux SL Release 4.0 (Beryllium)". The kernel is 2.6.9-42 . Scientific Linux is a Fedora-derivative, being used mostly in particle physics. Thanks and Best Regards, Ruediger

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error while compiling application that uses a static lib that uses boost
by ChristinaDRS 23 Apr '09

23 Apr '09

Greetings all, I have a library called test which has a class that uses boost thread and mutex. here is how the includes in my .h file look: #include <boost/thread/mutex.hpp> #include <boost/thread.hpp> and here are the private vars: boost::mutex connectedPeersMutex_; boost::thread* listenThread_; in the .cpp file i have I use: #include <boost/bind.hpp> Now here is how I built my library with this Makefile: SRC = test1.cpp test2.cpp OBJ = $(SRC:.cpp=.o) OUT = libtest.a INCLUDES = -I. -I$$BOOST_ROOT CCFLAGS = -g CCC = g++ LDFLAGS = -g .SUFFIXES: .cpp default: $(OUT) .cpp.o: $(CCC) $(INCLUDES) $(CCFLAGS) -c $< -o $@ $(OUT): $(OBJ) ar rcs $(OUT) $(OBJ) clean: rm -f $(OBJ) $(OUT) Makefile.bak now I try to build a second application that simply uses the libtest.a like this: $ g++ -I ~/boost_1_38_0/ -I. main.cpp -omain -L/usr/local/lib/ -L. -ltest -lboost_thread-gcc41-mt-1_38 ./libtest.a(test1.o): In function `test1::StartServer(int, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, int)': /home/chris/test1.cpp:337: undefined reference to `boost::thread::thread(boost::function0<void, std::allocator<boost::function_base> > const&)' ./libtest.a(test1.o): In function `~ test1': /home/chris/test1.cpp:36: undefined reference to `boost::mutex::~mutex()' /home/chris/test1.cpp:36: undefined reference to `boost::mutex::~mutex()' /home/chris/test1.cpp:36: undefined reference to `boost::mutex::~mutex()' /home/chris/test1.cpp:36: undefined reference to `boost::mutex::~mutex()' /home/chris/test1.cpp:36: undefined reference to `boost::mutex::~mutex()' ./libtest.a(test1.o):/home/chris/test1.cpp:36: more undefined references to `boost::mutex::~mutex()' follow ./libtest.a(test1.o): In function `test1': /home/chris/test1.cpp:8: undefined reference to `boost::mutex::mutex()' /home/chris/test1.cpp:8: undefined reference to `boost::mutex::mutex()' ./libtest.a(test1.o): In function `boost::detail::thread::lock_ops<boost::mutex>::lock(boost::mutex&)': /usr/include/boost/thread/detail/lock.hpp:33: undefined reference to `boost::mutex::do_lock()' ./libtest.a(test1.o): In function `boost::detail::thread::lock_ops<boost::mutex>::unlock(boost::mutex&)': /usr/include/boost/thread/detail/lock.hpp:45: undefined reference to `boost::mutex::do_unlock()' collect2: ld returned 1 exit status Any idea why I am getting these undefined references? Thanks! Christina -- View this message in context: http://www.nabble.com/error-while-compiling-application-that-uses-a-static-… Sent from the Boost - Users mailing list archive at Nabble.com.

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how to use boost.phoenix with std:for_each?
by Bruce Laing 23 Apr '09

23 Apr '09

Hi, I would like to do something like this: struct a_name { std::string name; }; a_name names[] = { std::string("one"), std::string("two") }; std::for_each( &names[0], &names[1], if_(1) [ std::cout << arg1.name ] ); but VC8 complains "error C2039: 'name' : is not a member of 'boost::phoenix::actor<Eval>'" Can anyone tell me what I'm doing wrong here? Thanks for your insights, - Bruce

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Re: [Boost-users] [Statechart] Passing reference tocreate_processor()
by Andreas Huber 22 Apr '09

22 Apr '09

Hi Igor > I've got the same problem now. Is there > any solution or workaround so far? No, sorry. I haven't yet had sufficient time to find the root cause. I hope I'll get to it tomorrow. Regards, Andreas

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[statechart] Question about do activities
by Bill Clark 22 Apr '09

22 Apr '09

In the boost::statechart documentation, on the UML mapping page, it says this about do activities: “A do activity can be simulated with a separate thread that is started in the entry action and cancelled (!) in the exit action of a particular state.” What's the significance of the exclamation point here? Is it suggesting that the thread should be killed rather than joined? I'm considering boost::statechart for a design where do activities will be a fundamental feature, so I'm wondering whether we might run into problems with this.

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binding to new
by Noah Roberts 22 Apr '09

22 Apr '09

I have a factory that returns an instance of a concrete under an abstraction. It works by matching a "command" string to a command handler that is created and returned to the client. It's basically a stack of regex->creator pairs. The creator is a function that returns a pointer to the abstract type. I'd like to provide that function by binding to the new operator. Currently I have a static function in each concrete type that just calls new and I bind to it. I can't think of what syntax I would use to bind to new and am inclined to think it impossible, but I thought I'd ask.

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Compiling exception/get_error_info.hpp in Visual Stuido UNICODE project
by Oleg V. Zhylin 22 Apr '09

22 Apr '09

Hi, I'm trying to compile my project in MS Visual Studio 2008 with UNICODE and _UNICODE symbols defined. This automatically makes std::string resolve to std::wstring. I'm having a problem compiling exception/get_error_info.hpp because of the following code struct strwrap { std::string str; char const * ptr; explicit strwrap( char const * s ): str(s), ptr(&str[0]) { } Error messages quite predictably say about type inconsistency, there's a copy of them below my signature. Is there a known way to tweak boost to build seamlessly with Visual Studio Unicode projects? WBR Oleg V. Zhylin ovz(a)yahoo.com g:\Program Files\boost\boost_1_38\boost\exception\get_error_info.hpp(30) : error C2664: 'std::basic_string<_Elem,_Traits,_Ax>::basic_string(const std::basic_string<_Elem,_Traits,_Ax>::_Alloc &)' : cannot convert parameter 1 from 'const char *' to 'const std::basic_string<_Elem,_Traits,_Ax>::_Alloc &' with [ _Elem=wchar_t, _Traits=std::char_traits<wchar_t>, _Ax=std::allocator<wchar_t> ] and [ _Elem=wchar_t, _Traits=std::char_traits<wchar_t>, _Ax=std::allocator<wchar_t> ] Reason: cannot convert from 'const char *' to 'const std::basic_string<_Elem,_Traits,_Ax>::_Alloc' with [ _Elem=wchar_t, _Traits=std::char_traits<wchar_t>, _Ax=std::allocator<wchar_t> ] No constructor could take the source type, or constructor overload resolution was ambiguous g:\Program Files\boost\boost_1_38\boost\exception\get_error_info.hpp(30) : error C2440: 'initializing' : cannot convert from 'std::allocator<_Ty>::value_type *' to 'const char *' with [ _Ty=wchar_t ] Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast g:\Program Files\boost\boost_1_38\boost\exception\get_error_info.hpp(30) : error C2439: 'boost::exception_detail::strwrap::ptr' : member could not be initialized g:\Program Files\boost\boost_1_38\boost\exception\get_error_info.hpp(24) : see declaration of 'boost::exception_detail::strwrap::ptr' g:\Program Files\boost\boost_1_38\boost\exception\diagnostic_information.hpp(60) : error C2664: 'std::basic_string<_Elem,_Traits,_Ax>::basic_string(const std::basic_string<_Elem,_Traits,_Ax>::_Myt &)' : cannot convert parameter 1 from 'std::basic_ostringstream<_Elem,_Traits,_Alloc>::_Mystr' to 'const std::basic_string<_Elem,_Traits,_Ax>::_Myt &' with [ _Elem=wchar_t, _Traits=std::char_traits<wchar_t>, _Ax=std::allocator<wchar_t> ] and [ _Elem=char, _Traits=std::char_traits<char>, _Alloc=std::allocator<char> ] and [ _Elem=wchar_t, _Traits=std::char_traits<wchar_t>, _Ax=std::allocator<wchar_t> ] Reason: cannot convert from 'std::basic_ostringstream<_Elem,_Traits,_Alloc>::_Mystr' to 'const std::basic_string<_Elem,_Traits,_Ax>::_Myt' with [ _Elem=char, _Traits=std::char_traits<char>, _Alloc=std::allocator<char> ] and [ _Elem=wchar_t, _Traits=std::char_traits<wchar_t>, _Ax=std::allocator<wchar_t> ] No constructor could take the source type, or constructor overload resolution was ambiguous

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