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Task groups using boost::thread
by gunnarnl 20 Mar '02

20 Mar '02

After overcoming my initial problems with compiling I have another question. I like very much the thread_group concept. My idea is to create different groups running different type of tasks. E.g. one group deals with user request tasks and another deal with responses from a mainframe etc. In addition, I think it would be good to be able to maximize the number of threads running concurrently in a single group. In this way one could tune the processes regarding to the number of CPUs and so that not one single group gets more CPU usage than others etc. I guess I'm not the first one to think about these things. Does anyone have any ideas about these type of task groups? Although it doesn't nearly contain what I want to do, I got the following test work nicely. #include <boost/thread/thread.hpp> #include <boost/thread/xtime.hpp> #include <iostream> #include <windows.h> template<class T> class thread_task { public: thread_task(T* obj) : m_obj(obj) { assert(m_obj != 0); } virtual ~thread_task() { } void operator() () { m_obj->setup(); m_obj->run(); m_obj->cleanup(); delete m_obj; } private: T* m_obj; }; class my_task { public: my_task() {} void setup() { std::cout << "setup " << GetCurrentThreadId() << std::endl; } void run() { std::cout << "Start sleeping in thread " << GetCurrentThreadId() << std::endl; boost::xtime xt; boost::xtime_get(&xt, boost::TIME_UTC); xt.sec += 1; boost::thread::sleep(xt); std::cout << "Woke up " << GetCurrentThreadId() << std::endl; } void cleanup() { std::cout << "cleanup " << GetCurrentThreadId() << std::endl; } }; int main(int argc, char* argv[]) { boost::thread_group threads; int i; for (i = 0; i < 10; ++i) { my_task* aTask = new my_task(); thread_task<my_task> new_task(aTask); threads.create_thread(new_task); } threads.join_all(); return 0; } By the way, is there an operation in boost::thread to get the current thread id?

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Problem linking boost::threads using MSVC6 SP4
by gunnarnl 20 Mar '02

20 Mar '02

I've created a windows console project with VC++ 6.0 and just used one of the examples in the documentation. I've also added the BOOST_HAS_THREADS macro in the settings. The program compiles well in debug mode but gives the following linking errors: Compiling... main.cpp Linking... msvcprtd.lib(MSVCP60D.dll) : error LNK2005: "public: virtual __thiscall std::runtime_error::~runtime_error(void)" (?? 1runtime_error@std@@UAE@XZ) already defined in main.obj msvcprtd.lib(MSVCP60D.dll) : error LNK2005: "public: __thiscall std::runtime_error::runtime_error(class runtime_error::runtime_error const &)" (??0runtime_error@std@@QAE@ABV01@@Z) already defined in main.obj msvcprtd.lib(MSVCP60D.dll) : error LNK2005: "public: __thiscall std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >::~basic_string<char,struct std::char_traits<char>,class std::allocator<char> >(void)" (??1? $basic_strin g@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAE@XZ) already defined in main.obj msvcprtd.lib(MSVCP60D.dll) : error LNK2005: "public: __thiscall std::runtime_error::runtime_error(class runtime_error::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &)" (??0runtime_error@std@@QAE@ABV? $basic_strin g@DU?$char_traits@D@std@@V?$allocator@D@2@@1@@Z) already defined in libcpmtd.lib(ios.obj) msvcprtd.lib(MSVCP60D.dll) : error LNK2005: "public: __thiscall std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >(char const *,class basic_ string<char,struct std::char_traits<char>,class std::allocator<char> >::allocator<char> const &)" (??0?$basic_string@DU? $char_traits@D@std@@V?$allocator@D@2@@std@@QAE@PBDABV? $allocator@D@1@@Z) already defined in main.obj LINK : warning LNK4098: defaultlib "MSVCRTD" conflicts with use of other libs; use /NODEFAULTLIB:library Debug/threads.exe : fatal error LNK1169: one or more multiply defined symbols found Error executing link.exe. Any help on this would be appreciated. Gunnar Olerud

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BFS-visitor with gcc3.0.1
by Wintermantel , Marc 20 Mar '02

20 Mar '02

Hello, I tried to complile the following code that worked under gcc 2.95.3 under gcc 3.0.1 and got tons of error messages: typedef adjacency_list< setS, vecS, undirectedS, property< vertex_color_t, default_color_type, property< vertex_degree_t, int, property< vertex_current_degree_t, int, property< vertex_priority_t, int > > > > > Graph; ... std::vector<graph_traits<Graph>::vertices_size_type> dist(num_vertices(G), 0); breadth_first_search (G, e, visitor ( make_bfs_visitor(record_distances(dist.begin(), on_tree_edge() ) ) ) ); ... The errors have something to deal with the visitors, more I could not read out of the errors. When I use a simple array in the form int d[n] it works. Yours truly, Marc Wintermantel Marc Wintermantel IMES - Structures Technology ETH Zurich, LEO C4 Leonhardstrasse 27 CH- 8092 Zurich Tel. ++41 1 633 35 32 Fax. ++41 1 632 17 02 [Non-text portions of this message have been removed]

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Still can't build boost on Linux with gcc 3.0.4
by Peter Simons 19 Mar '02

19 Mar '02

Hi, thanks to some helpful subscriber of this list, I figured out how to tell the Boost Build System where my Python is: I thus initiated the build by calling jam -sPYTHON_ROOT=/usr/local/python -sPYTHON_VERSION=2.2 \ -sBOOST_ROOT=/home/simons/projects/boost-current -sTOOLS=gcc but I am still getting lots of errors when trying to compile the latest version. A complete log of the failing build is available at http://cryp.to/boost-build-log.txt for anyone concerned. I'd appreciate any help on getting these errors fixed! -peter

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Request for reviewers for a book about Boost
by Björn Karlsson 18 Mar '02

18 Mar '02

Dear Boosters, I am currently working on "Beyond The C++ Standard Library - An Introduction to Boost", which is a tutorial-style book about several of the Boost libraries. Where would one seek knowledgeable reviewers? Of course, it is here, and that's the reason for this note. Before saying more, I would like to ask that responses be sent directly to me rather than to the list. The moderators have allowed this note, but this is not intended to become a discussion. Should I receive notes of public interest, I'll post those to the list. Also, for those that are subscribing to both Boost (developers) and Boost-Users, my apologies for cross-posting. Onwards! The book will cover the following libraries (minor modifications to this list may occur): * Any * Array * Bind * Call_traits * Compose * Concept check * Conversion * Functional * Operators * Random * Rational * Regex * Smart_ptr * Static_assert * Tokenizer * Tuple * Type_traits * Utility I am looking for people interested in reviewing one or more chapter(s) (libraries). If you are volunteering, please add information that states the library, or libraries, that you'd be willing to review. Where one reviewer will have a deep knowledge about the libraries, another may only have a strong interest. Both are very welcome! What's in it for you? Not money I'm afraid, but something that is hopefully more valuable: A chance to make the book better, to share some of your knowledge, and maybe to learn something new. Your name in the preface :-). To volunteer, send a comment or ask a question, please contact me directly at bjorn.karlsson(a)readsoft.com. Thanks! Before I end this post: Boost is becoming more and more important for the C++ community, and I would like to thank all participating Boosters for the libraries, the ideas, the research, the discussions and the enthusiasm that sums up to what we call Boost. All of this not only makes the world a better place, it also (which I personally think is more important) makes the world more interesting! Thanks, Bjorn Karlsson [Non-text portions of this message have been removed]

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Re: [Boost-Users] Re: Does filter_iterator work for maps?
by Rodrigo de Salvo Braz 17 Mar '02

17 Mar '02

-----Mensagem original----- De: Jeremy Siek <jsiek(a)cs.indiana.edu> >The above program compiles OK for me with g++ 2.95.2. What compiler are >you using? (there's a good chance the compiler error you are getting is a >bug in your compiler, not in your code or in the Boost code). Hi Jeremy, Thanks for the reply. Yes, I think it is the compiler too. I am using the Borland C++ Builder compiler 5.5 (the free command line compiler Borland made available a while ago). I am not sure yet I am not making a mistake, because I would expect this to be a popular compiler and simple things like this to have been found by now. All it takes to use the iterator adaptor libraries is including the header files, right? Thanks, Rodrigo _________________________________________________________ Do You Yahoo!? Get your free @yahoo.com address at http://mail.yahoo.com

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regex expression core dumps with \\
by soleani 17 Mar '02

17 Mar '02

Hi there, I've been using regex++ (v 3) for a while now. It's great! I just found out that my regex core dumps my program, look: std::string StringUtilities::getMsqlEscapedString( const char* input ) { if ( input == NULL ) return ""; cerr << "Hello" << endl; std::string inputStr( input ); cerr << "Hello111 (" << inputStr << ")" << endl; static const boost::regex expression1( "\\" ); cerr << "Hello222" << endl; string temp = boost::regex_merge( inputStr, expression1, "\\\\" ); cerr << "Hello33" << endl; static const boost::regex expression2( "'" ); return boost::regex_merge( temp, expression2, "\\'" ); } // StringUtilities::getMsqlEscapedString That's all I have. When I call it I see this: Testing getMsqlEscapedString... Hello Hello111 (hello) Aborted (core dumped) So, it seems that the call to: static const boost::regex expression1( "\\" ); makes it core dump. I went and changed that regular expression by "\"", just for kicks, and it works; it doesn't do what I want but it doesn't core dump. Anything I should do to avoid this problem? thanks, -Anibal

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Error with boost::regex library with Borland C++ Builder 6
by ynaig2k 17 Mar '02

17 Mar '02

Hi, I tried everything to understand why I get the error "Abnormal program termination" in the second run of the function with the following code: void function() { regex e( std::string(Edit1->Text.c_str()) ); cmatch what; string response; TFileStream* file = new TFileStream( "1.htm", fmOpenRead ); response.resize(file->Size+1); file->Read(response.begin(), file->Size); response[file->Size] = 0; delete file; std::string::const_iterator start; start = response.begin(); while( regex_search( start, what, e ) ) { for ( unsigned int i = 0 ; i < what.size() ; i++ ) { { std::string result = std::string(what[i].first, what[i].second); Memo1->Lines->Add( result.c_str() ); } Memo1->Lines->Add(""); start = what[0].second; } } Thanks

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Re: [Boost-Users] Re: Does filter_iterator work for maps?
by Rodrigo de Salvo Braz 16 Mar '02

16 Mar '02

-----Mensagem original----- De: Jon Kalb <kalb(a)LibertySoft.com> Para: Boost-Users(a)yahoogroups.com <Boost-Users(a)yahoogroups.com> Data: Sexta-feira, Março 15, 2002 09:01 Assunto: Re: [Boost-Users] Re: Does filter_iterator work for maps? On 3/15/02 4:37 PM, "rodrigo_braz" <rodrigo_braz(a)yahoo.com> wrote: >> Actually my main problem with this iterator is in the code below: >CodeWarrior doesn't complain about this code, but I think that it should be: As Jeremy pointed out, that doesn't work. It sounds like it is a compiler issue (I am using Borland). I will go back to the boost pages to see if there is anything I can do about it. Thanks, Rodrigo _________________________________________________________ Do You Yahoo!? Get your free @yahoo.com address at http://mail.yahoo.com

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Does filter_iterator work for maps?
by rodrigo_braz 16 Mar '02

16 Mar '02

Hi, I don't see a reason for filter_iterator not to work with map iterators. However, the program below doesn't work. I get a compiler error "Cannot generate template specialization from 'make_filter_iterator<Predicate,Iterator> (Iterator,Iterator,const Predicate &)' in function main()" Any ideas? Thanks, Rodrigo #include <map> #include <ostream> #include "boost/iterator_adaptors.hpp" #include <algorithm> using namespace std; using namespace boost; struct pair_is_active { bool operator()(const pair<const size_t,float>& p) { return 0 < p.second; } }; ostream& operator<<(ostream& o, pair<const size_t, float> p) { return o << "(" << p.first << ", " << p.second << ")"; } int main() { map<size_t,float> m; m[0] = 10; m[1] = 15; m[2] = 0; m[3] = 13; copy(boost::make_filter_iterator<pair_is_active>(m.begin, m.end()), boost::make_filter_iterator<pair_is_active>(m.end(), m.end()), ostream_iterator<pair<const size_t,float> >(cout,",")); return 0; }

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boost newbie questions
by Harm de Laat 15 Mar '02

15 Mar '02

Hi all, I'm new to Boost and relativily new to C++. I'm trying to program threads on my Redhat 7.2 linux. I have the following code: #include <iostream> #include <boost/thread/thread.hpp> #include <boost/thread/xtime.hpp> struct thread_struct { thread_struct(int secs) : m_secs(secs) {} void operator ()() { boost::xtime xt; boost::xtime_get(&xt, boost::TIME_UTC); xt.sec += m_secs; boost::thread::sleep(xt); std::cout << "Boosted!!!" << std::endl; } int m_secs; }; int main (int argc, char* argv[]) { int secs = 5; std::cout << "Starting..." << std::endl; thread_struct ts(secs); boost::thread thrd(ts); thrd.join(); } The code compiles without any problems... But do I have link it against some library? Because I cannot link it to an executable file. I'm new to this. So can somebody please be so kind to help me and describe the steps nessecary to run this Thread example file... Many Thanks, Harm de Laat Informatiefabriek The Netherlands

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Error with boost::regex library in Borland C++ Builder 6
by Giany2k 14 Mar '02

14 Mar '02

Hi, Can anyone explain to me why I get "Abnormal program termination" at the exit of the function shown below in the example. The error occurs when exiting the function after it was called second time. //---------------------------------------------------------------------- ----- #include <vcl.h> #pragma hdrstop #include <boost/regex.hpp> #include <string> #include "Unit1.h" //---------------------------------------------------------------------- ----- #pragma package(smart_init) #pragma resource "*.dfm" TForm1 *Form1; //---------------------------------------------------------------------- ----- __fastcall TForm1::TForm1(TComponent* Owner) : TForm(Owner) { Edit1->Clear(); } //---------------------------------------------------------------------- ----- using namespace boost; using namespace std; void __fastcall TForm1::Button1Click(TObject *Sender) { Memo1->Clear(); if ( Edit1->Text.IsEmpty() ) return; regex e( std::string(Edit1->Text.c_str()) ); cmatch what; string response; TFileStream* file = new TFileStream( "1.htm", fmOpenRead ); response.resize(file->Size+1); file->Read(response.begin(), file->Size); response[file->Size] = 0; delete file; std::string::const_iterator start; start = response.begin(); while( regex_search( start, what, e ) ) { for ( unsigned int i = 0 ; i < what.size() ; i++ ) { std::string result = std::string(what[i].first, what[i].second); Memo1->Lines->Add( result.c_str() ); } Memo1->Lines->Add(""); start = what[0].second; } } //---------------------------------------------------------------------- -----

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Build problems on Linux with gcc 3.0.4
by Peter Simons 13 Mar '02

13 Mar '02

Hi, I have tried to build the current boost library as checked-out of the CVS repository, but I failed miserably. For one, the build process failed to recogize that Python is installed in /usr/local/python rather than /usr/local. As a result, it didn't find the python-specific include files either. I tried to set the appropriate environment variables but failed. So I added the directory /usr/local/python/include/python2.2 to CPLUS_INCLUDE_PATH and then it worked -- at least a little better than before. Once the Python includes were found, the build process progressed to actually linking some programs: gcc-Link-action status/bin/config_test.test/gcc/debug/runtime-link-dynamic/threading-multi/config_test status/bin/config_test.test/gcc/debug/runtime-link-dynamic/threading-multi/config_test.o: In function `boost_has_clock_gettime::f()': /home/simons/projects/boost-current/libs/config/test/boost_has_clock_gettime.cxx:19: undefined reference to `clock_gettime' collect2: ld returned 1 exit status Another failure was: ...failed gcc-Link-action status/bin/config_test.test/gcc/release/runtime-link-dynamic/threading-multi/config_test ... gcc-C++-action status/bin/class_concept_fail_expected.test/gcc/debug/runtime-link-dynamic/class_concept_fail_expected.o /home/simons/projects/boost-current/boost/concept_check.hpp: In member function `void boost::EqualityComparableConcept<TT>::constraints() [with TT = foo]': /home/simons/projects/boost-current/libs/concept_check/class_concept_fail_expected.cpp:25: instantiated from here /home/simons/projects/boost-current/boost/concept_check.hpp:265: no match for `foo& == foo&' operator /home/simons/projects/boost-current/boost/concept_check.hpp:266: no match for `foo& != foo&' operator Plenty of files failed to compile or to link, but I don't want to flood the list with error messages. So, first of all, is there any "right" way to tell the build process where python is installed? Maybe I should start from the scratch from there. -peter

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Jam: Building libraries that use the static runtime library
by Dale Peakall 13 Mar '02

13 Mar '02

I need to build libraries that link against the static runtime library: I tried the following Jam invocation: jam -sBOOST_ROOT=. -sTOOLS="msvc-stlport" -sBUILD="debug release <runtime-link>static" But jam balks and reports: Error: <libs!python!build>libboost_python_static: target requirements conflict for requested build { <runtime-link>dynamic <target-type>LIB <runtime-link>static } Help! So, I've obviously got it wrong (btw I'm not interested in building python library just threads and regex). TIA. - Dale.

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AIX and Boost 1.27.0 (Does not compile)
by samsrd 12 Mar '02

12 Mar '02

Has anyone tried to compile Boost 1.27.0 (or any version for that matter) on IBM AIX using the xlC compiler (IBM Visual Age). There are many compile errors (usually template related) along the lines of: "../../../../ThirdParty/boost/regex/detail/regex_cstring.hpp", line 77.40: 1540- 0152 (W) A template dependent name that is a type must be qualified with "typena me". "../../../../ThirdParty/boost/regex.hpp", line 528.55: 1540-0152 (W) A template dependent name that is a type must be qualified with "typename". "../../../../ThirdParty/boost/regex.hpp", line 532.13: 1540-1628 (S) Every templ ate parameter for a constructor template must be used in the parameter list of t he constructor. "../../../../ThirdParty/boost/regex.hpp", line 532.34: 1540-0152 (W) A template dependent name that is a type must be qualified with "typename". "../../../../ThirdParty/boost/regex.hpp", line 744.13: 1540-0152 (W) A template dependent name that is a type must be qualified with "typename". "../../../../ThirdParty/boost/regex.hpp", line 938.4: 1540-0152 (W) A template d ependent name that is a type must be qualified with "typename". "../../../../ThirdParty/boost/regex.hpp", line 438.27: 1540-0130 (S) "def_alloc_ param_traits" is not declared. "../../../../ThirdParty/boost/regex.hpp", line 1414.1: 1540-0062 (S) The incompl ete class "match_results" must not be used as a qualifier. "../../../../ThirdParty/boost/regex.hpp", line 1455.35: 1540-0140 (S) The text " &" is unexpected. "match_results" may be undeclared, ambiguous or may require " typename" qualification. "../../../../ThirdParty/boost/regex.hpp", line 444.7: 1540-1303 (I) "template cl ass match_results" is not visible. @

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thread::yield() vs Sleep()ing
by simonwlb 10 Mar '02

10 Mar '02

I'm using thread::yield() in my multi-threaded cross-platform application to avoid "CPU burn". This is because I have threads that are in an infinte loop in order to do some polling. There are no mutexes to wait on in the loop. void X::threadFunction() { for(;;) { if( m_x->isReady() ) doSomething(); . . . boost::thread::yield(); } } If the answer is "you should almost never poll like that - try to use mutexes etc. as much as possible" please say so (I'm a newbie to threads)! In any case, if I choose to have a thread in an infinite loop anyway, I have three options (assuming I have no mutexes available to me): 1. Don't yield or Sleep at all. 2. Sleep for a while - say for example, 10 ms. 3. Yield. Option 1 is clearly wrong. The CPU usage will go to 100% and the whole machine may slow down to an unusable speed. Option 2 works well in my emperical tests. The thread loop executes plenty fast enough and my Windows CPU meter shows virtually 0% CPU usage. 10ms is a bit of an arbitrary figure though - My code needs to work on a variety of software and hardware platforms, so the ideal number is hard or impossible to know. Option 3 also works well in my emperical tests and seems like the neat solution (no arbitrary waiting period). My application and the system as a whole both run smoothly and fast. The only irksome thing is that the CPU meter shows 100% usage. That's a bit alarming for me and the users of my software. My questions: 1. Should thread loops without logical wait conditions be avoided as much as possible? Is that the problem? 2. Should I just yield() or should I pause for a time period? 3. How do you select a time period to wait? Simon Bailey

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Boost Building
by karl_m_au 09 Mar '02

09 Mar '02

Hiya I'm trying to build boost 1.27.0 on a Debian linux system. I've built the boost version of jam. Both g++ 2.95.3 and g++ 3.0.3 are installed. I'm pretty sure I've made the appropriate changes to get g++ 3.0 to be used in the build process. I've used various versions of the command line recommended in the documentation. Very few of the builds work, becuse of this: g++-3.0 -c -Wall -ftemplate-depth-100 -I"libs/regex/build" -o "libs/regex/build/bin/libboost_regex.a/gcc-3/debug/c_regex_traits.o" "libs/regex/build/../src/c_regex_traits.cpp" Somehow the <include> directive isn't working. Any clues? TIA Karl M

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Boost python
by andrewperella 08 Mar '02

08 Mar '02

I am having great trouble with boost python whenever I do anything slightly more compilcated than the examples. I have a wrapped a Vector3 class with 3 floats x,y,z. In python: a=m2.Vector3(1,2,3) a.x 1.0 a.x=100 a.x 100.0 This is correct - ie I can disply and modify a.x Unfortunatedly if wrap another class - Camera which contains a member variable : Vector3 pos then I cannot set camera.pos.x Looking in the debugger, I seem to be getting a copy (in fact sometime 3 or more copy constructors are called) of pos and I am modifying this temporary copy! Help. Surely I can wrap no pointer member variables? Regards, Andrew

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1.27 BGL and VC++7.0 compilation problem
by elgatomoses 07 Mar '02

07 Mar '02

I am having trouble compiling the Graph library with VC++7.0 (.NET) - I'm getting "INTERNAL_COMPILER_ERROR". The problem has to do with the is_array definition in composite_traits.hpp. Has anyone else encountered this problem - perhaps there are some compiler switches that I can set... TIA Mark Kruger

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Boost.build question: Adding a new unit-test rule
by Helge Penne 04 Mar '02

04 Mar '02

Hi. I'm working on a project where some of the unit test are very inconvenient to implement with CppUnit and Mock classes or stubs alone, but would be very simple to implement by having them print messages to standard output, pipe this to a log file and diff this against a reference file. I added the following to our Jamrules file (most of it is stolen from the standard unit-test rule and run action): rule unit-test-diff { local files = [ exe $(<) : $(2) : $(3) : $(4) : EXE ] ; type-DEPENDS test : $(files) ; local file ; for file in $(files) { run-and-diff $(file) ; } } actions run-and-diff { $(SHELL_SET)PATH=$(RUN_PATH) $(SHELL_EXPORT)PATH $(<) > $(<:D=:S=.log) diff $(<:S=.log) $(<:S=.ref) # diff $(<:D=:S=.log) $(<:D=:S=.ref) } This runs the unit test program, pipes the output to <targetname>.log and diffs agains <targetname>.ref. There is only one problem: I cannot get Boost.build to locate these files in the correct folder. The Jamfile for the unit test is located in the same folder as the unit test source code. This is the only natural place for the ref-file as well. The action above has three different alternatives for the actual diff operation. The first uses the full path of the executable, but replaces the last part of the file name with .log and .ref. This places them in the binary folder of the unit test program, which isn't not very convenient. The second strips away the path, but since the currect folder always is the project root (not the folder where the Jamfile is), this places the log and ref files on the project root, which is almost as bad as the first alternative. I also experimented briefly with :G but this has no effect as the file path did not seem to contain grist. One possible solution might be to add a path feature to the target and set this to the reference file name, but I'm not quite sure how to implement this for rules that are not part of a tools.jam-file I really need the unit test rule to place these files in the folder where the rest of the test source code is. Does anyone know how to do this? - Helge Penne

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(no subject)
by Hook.RobertA(CC) 04 Mar '02

04 Mar '02

I put the following up at source forge support, then realised that doesn't seem to be likely to get a response.... I would have put this through the yahoo group, but I'm stuck behind a mind-bogglingly repressive firewall. SO I'll scream for help here, bearing in mind the dictum that in cyberspace no-one can hear you scream. I have download 1.27.0, and am attempting to build and use Boost under HP-UX 11.00. There are two problems, and I cannot tell if they are related or not. Firstly, the install instructions along the lines of jam -sBOOST_ROOT=. -=sTOOLS="hpux" simply produce the following (after I bodgied up a hpux-tools.jam) +: line 1304: yacc stack overflow at keyword } don't know how to make all ...found 1 target... ...can't find 1 target... after smacking my head on the desk for several days, I've given up on that one and attempted to build boost_1_27_0/libs/tuple/test/io_test.cpp using aCC -c +z +p $APP_INCLUDE -o io_test.o io_test.cpp (where APP_INCLUDE is -I <yada/yada/yada> as appropriate) which results in "tuple_basic.hpp", line 290 # Cannot generate a specialization of incomplete template struct STATIC_ASSERTION_FAILURE<(bool)0>. BOOST_STATIC_ASSERT(length<cons>::value == 2); // check length = and errors cascading after that. Looking at various messages and comments, I believe that someone somewhere has managed to get boost working under HP-UX, but I'm dammned if I can. Help! Oh yes, by the way, I'm stuck behind a repressive firewall and cannot even *read* the message archive at Yahoo, let alone subscribe / post! (Puts head down on desk and begins sobbing quietly) -- Robert Hook - DCC Analyst/Programmer Polaris Group, Information Systems Branch Queensland Police Service Hook.RobertA(a)police.qld.gov.au PH: 07 3364 3807 ********************************************************************** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify securityscanner(a)police.qld.gov.au. This footnote also confirms that this email message has been checked for the presence of computer viruses. **********************************************************************

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[Fwd: compile time container type identification]
by hicks 01 Mar '02

01 Mar '02

Hello I need to identify if a container is of a certain type. Specifically, from inside the code for container template <class T> Cont, I want to identity if T is itself of type Cont<U> for some U. (The type of U does not matter.) I couldn't see anything in *_traits.hpp that looks applicable. Any advice or references would be appreciated. Craig Hicks KGK Tokyo [Non-text portions of this message have been removed]

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RE: [Boost-Users] Linking an Archive
by Tom Matelich 27 Feb '02

27 Feb '02

The first getting_started1.so contains all the symbols from all of the objects linked into it. The second one only contains the symbols from getting_started.o and the symbols from libboost_python.a which satisfy unsatified symbols of getting_started1.o. Linking shared library is like linking an executable, it only takes the symbols from archives that it needs to satisfy itself. The first question is why you want libboost_python.a. If it is a valid reason, then you need to find a way to get all the code you need out of it into the shared lib. The first would be to use ar to get all the objects out, then take those and put them into the shared library. The second would be to keep adding unsatified symbols to getting_started.o until getting_started1.so has everything it needs. Tom > -----Original Message----- > From: doak87508 [mailto:jdoak@lanl.gov] > Sent: Wednesday, February 27, 2002 10:21 AM > To: Boost-Users(a)yahoogroups.com > Subject: [Boost-Users] Linking an Archive > > > I am playing around with using an archive to created a shared library > (.so file) instead of linking all the individual objects. I have > success when I link individual objects: > > % g++ -shared classes.o conversions.o errors.o extension_class.o > functions.o init_function.o module_builder.o objects.o types.o > cross_module.o getting_started1.o -o getting_started1.so > > % python > 1;31mh[1] >>> import getting_started1 > 1;31mh[1] >>> getting_started1.greet() > 'hello, world' > > Now, I create an archive: > > % ar r libboost_python.a classes.o conversions.o errors.o > extension_class.o functions.o init_function.o module_builder.o > objects.o types.o cross_module.o > > Then, I link that archive into the shared library: > > % g++ -shared libboost_python.a getting_started1.o -o > getting_started1.so > > % python > 1;31mh[1] >>> import getting_started1.so > Traceback (most recent call last): > File "<stdin>", line 1, in ? > ImportError: ./getting_started1.so: undefined symbol: > add__Q35boost6python19module_builder_basePQ45boost > 6python6detail8functionPCc > > I have also tried linking as follows with no change in result: > > % g++ -shared -L. -lboost_python getting_started1.o -o > getting_started1.so > > Does someone know how to get linking working with an archive file? > > JD > > > > Info: <http://www.boost.org> > Wiki: <http://www.crystalclearsoftware.com/cgi-bin/boost_wiki/wiki.pl> > Unsubscribe: <mailto:boost-users-unsubscribe@yahoogroups.com> > > > Your use of Yahoo! Groups is subject to > http://docs.yahoo.com/info/terms/ > >

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in-place set_union/difference/etc ...
by ivan_dobrianov 27 Feb '02

27 Feb '02

Does anyone know of any existing standard tool [an insert iteartor or something equivalent] that can allow one to perform union, difference, etc on sets and maps in-place. E.g. instead of using set<MyClass> s1, s2, temp; set_union( s1.begin(), s1.end(), s2.begin(), s2.end(), inserter(temp, temp.begin())); temp.swap(s2); i'd like to do, say: copy(s1.begin(), s1.end(), my_unioner(s2, s2.begin())); which will do s2 = s1 + s2 in LINEAR time. It's pretty simple to write an inserter like that, but I am just wondering if there is one already ... or something similar. Thanks!

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Bug in boost_1_27_0.tar.gz threads library
by Martin Brown 27 Feb '02

27 Feb '02

Hi There seems to be a missing '}' in libs/thread/src/once.cpp when compiling on gcc-3.04 on Redhat Linux 6.2. I added one and it seems to work. Not sure if it is in the right place. Context diff: *** once.cpp Thu Feb 7 15:33:15 2002 --- once.cpp.new Wed Feb 27 15:53:02 2002 *************** *** 55,62 **** --- 55,63 ---- { once_callback* cb = reinterpret_cast<once_callback*>(pthread_getspecific(key)); (**cb)(); } + } #elif defined(BOOST_HAS_MPTASKS) void *remote_call_proxy(void *pData) { std::pair<void (*)(), boost::once_flag *> &rData(*reinterpret_cast<std::pair<void (*)(), boost::once_flag *> *>(pData)); Thanks for some great libraries! Martin __________________________________________________ Do You Yahoo!? Everything you'll ever need on one web page from News and Sport to Email and Music Charts http://uk.my.yahoo.com

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