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configure boost on cygwin
by Shan 01 Dec '06

01 Dec '06

Hi, I'm trying to use boost in a cygwin enviroment. I've installed the boost-1_33_1 libraries using the cygwin setup program. I have a makefile to compile a simple program but I keep getting the error. $ make g++ -c -O3 cash_flow.cpp In file included from cash_flow.cpp:6: cash_flow.h:12: error: `boost' has not been declared cash_flow.h:12: error: ISO C++ forbids declaration of `shared_ptr' with no type cash_flow.h:12: error: expected `;' before '<' token make: *** [cash_flow.o] Error 1 I'm new to Unix like environments and am not able to setup the makefile properly. Below is what I have TARGET = main CPP = g++ CPPFLAGS = -O3 INCLUDES = -I/usr/include/boost-1_33_1 LDFLAGS = LIBS = -lboost_1_33_1 SOURCES = $(wildcard *.cpp) DEPENDS = $(SOURCES:%.cpp=%.d) OBJECTS = $(DEPENDS:%.d=%.o) TMPS = $(wildcard *.hpp~) $(wildcard *.cpp~) $(TARGET) : $(OBJECTS) $(CPP) -o $@ $(LDFLAGS) $(OBJECTS) $(LIBS) clean : rm -rf $(TARGET) $(DEPENDS) $(OBJECTS) $(TMPS) $(DEPENDS) : %.d : %.cpp set -e; $(CPP) -MM $(CPPFLAGS) $< \ | sed 's/$$*$\.o[ :]*/\1.o $@ : /g' > $@; \ [ -s $@ ] || rm -f $@ $(OBJECTS) : %.o : %.cpp $(CPP) -c $(CPPFLAGS) $< .PHONY : clean include $(DEPENDS) I also tried using the includes/library names I tried that as well INCLUDES = -I/usr/include/boost-1_33_1 LDFLAGS = -L/usr/lib LIBS = -lboost_1_33_1 and $(OBJECTS) : %.o : %.cpp $(CPP) -c $(CPPFLAGS) $(INCLUDES) $< Still get the same error .. Can someone tell me which libboost*.a should I point to as there are many .. for eg to use boost::shared_ptr? Thanks S.

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#include <boost/lambda/lambda.hpp>
by Andreas Wißmeier 01 Dec '06

01 Dec '06

> Dear all, > > if I include this file I get the following error-message: > > d:\cvsatSixt\sixt_offer_src\boost\boost\lambda\detail\arity_code.hpp(66): > error C2065: 'T' : undeclared identifier > > > I am using > Microsoft Visual C++ .NET version 1.0.3705 > > I am probably missing something very basic. > > Kind regards > Andreas > > > > > Andreas Wißmeier > GDS-Projekt > Sixt GmbH & Co. Autovermietung KG > Zugspitzstr. 1 > D-82049 Pullach > Tel.: +49 (0)89 74444 4229 > E-Mail.: andreas.wissmeier(a)sixt.de >

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[bind,function,mem_fn] Connection to a base class
by Johannes Brunen 01 Dec '06

01 Dec '06

Hi, I have the following problem and don't know how to design it with the boost tools at hand: I have a base class X with two functions f and g class X { virtual bool f() const; virtual bool g(int) const; }; and another class Y with functions f1, f2 and F class Y { void f1(); void f2(); void F(???); }; Now, f1 and f2 should call F, but f1 should determine that F calls X::f polymorphically and f2 should determine that F calls X::g polymorphically. Y::f1() { // call F so that F works on X::f F(??? X::f); } Y::f2() { // call F so that F works on Y::g but with g's int parameter known and determined in Y::f2 int v = 5; F(??? X::g, v); } Y::F(???) { smart_ptr<Y> sp1(new Y); smart_ptr<Y> sp2(new Y); // Either call Y::f on sp1 and sp2, or call Y::g(5) on sp1 and sp2 } Is this possible? I have looked into the documentation of boost::bind, boost::mem_fn and boost::function but didn't find a way to do that. Could someone give me some hint? With best regards Johannes Brunen

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boost::weak_ptr and boost::intrusive_ptr
by Steven T. Hatton 01 Dec '06

01 Dec '06

Why is there no counterpart for boost::weak_ptr that works with boost::intrusive_ptr? It's certainly possible to set up cycles with boost::intrusive_ptr. A simple example where intrusive_ptr is the right thing to use, and where the problem arrises is a tree structure. It is sometimes useful to maintain a bidirectional pointer relationship between children and parent nodes in a tree. Ideally, deleting the root of a tree will cascade down to delete all intermediate and leaf nodes which are not referenced by some other object. If both the downward and upward pointers are intrusive, removing the pointer to the root will result in orphaned data because the upward pointers prevent the root node from being deleted, while the downward pointers prevent the child nodes (and their upward pointers) from being removed. Intrusive pointers are, IMO, the correct mechanism to hold a tree together. They are efficient, effective, and easy to understand. They work better than shared pointers for recursive data structures. Unfortunately the lack of a corresponding weak_ptr to go with boost::intrusive_ptr means I either use a raw pointer to the parent, devise a strategy for decrementing the pointers myself, or create my own weak pointer. All of these options detract significantly from the value of boost::intrusive_ptr. I have the impression that in the past people have used intrusive pointers for the "wrong things", and this has caused them to get an overall bad reputation. IMO, they do have a place in good software design. Any thoughts on this topic? Steven

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Re: [Boost-users] [Serialization] Linker ErrorsUsingUnicode(Was:errorC2027:useofundefinedtype'boost::serialization::extended_type_info_null<T>'?)
by Lawrence Spector 01 Dec '06

01 Dec '06

Ok, so basically I need to change the default in bjam to turn off wchar_t as a native type, because our project has issues with some legacy code which wouldn't comply otherwise. Any idea how to disable this in bjam? I searched through and couldn't find anything in any of the jam files that indicated that this setting was either on or off. Thanks again for the help, Lawrence -----Original Message----- From: boost-users-bounces(a)lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Robert Ramey Sent: Thursday, November 30, 2006 4:53 PM To: boost-users(a)lists.boost.org Subject: Re: [Boost-users] [Serialization] Linker ErrorsUsingUnicode(Was:errorC2027:useofundefinedtype'boost::serializatio n::extended_type_info_null<T>'?) I'm not sure that's true. What is necessary is that the switch setting must be the same as when the library is built. I presume its been built with bjam so its not readily apparent what the switch setting the library is actually built with. I'm quite sure that this is ok as vc 6.5 tests work and this version of compiler only has wchar_t defined as a 16 bit integer. Lawrence Spector wrote: > Ok, I was playing with the compiler settings and figured it out. > Apparently, in order to use this, you *must* have wchar_t treated as a > built-in type setting on in VC7.1. Ah ha. Maybe there's a good spot > to document that. I'll stick it in. > > Thanks for the assistance, > > Lawrence _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

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BOOST_STATIC_CONST
by Michael Held 01 Dec '06

01 Dec '06

hi, I am using BOOST_STATIC_CONST for static class members of a base class. I have following situation: template <int T> class A { typedef typename MyType<T>::value_type value_type; BOOST_STATIC_CONST(typename value_type::some_type, MY_CONSTANT = 0); }; template <int T> class B : public A<T> { typedef A<T> Base; typedef typename Base::value_type value_type; BOOST_STATIC_CONST(typename value_type::some_type, MY_CONSTANT = Base::MY_CONSTANT); }; or template <int T> class B : public A<T> { typedef A<T> Base; typedef typename Base::value_type value_type; using Base::MY_CONSTANT; }; for both cases I got a linker error: /usr/bin/ld: Undefined symbols: B<0>::MY_CONSTANT what am I doing wrong? I am using darwin gcc4.0.1 and Boost from CVS thanks a lot! michael

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Re: [Boost-users] [Serialization] Linker Errors Using Unicode(Was:error C2027: useofundefinedtype'boost::serialization::extended_type_info_null<T>'?)
by Lawrence Spector 30 Nov '06

30 Nov '06

Ok, I was playing with the compiler settings and figured it out. Apparently, in order to use this, you *must* have wchar_t treated as a built-in type setting on in VC7.1. Ah ha. Maybe there's a good spot to document that. Thanks for the assistance, Lawrence

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Re: [Boost-users] Suggestion for boost`s smart pointers
by Sohail Somani 30 Nov '06

30 Nov '06

> -----Original Message----- > From: boost-users-bounces(a)lists.boost.org > [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Ilya Sokolov > sorry for such late response, i think you should also consider > Andrei and Petru's ScopeGuard from > http://www.ddj.com/dept/cpp/184403758 I think such an idea mixed with tr1/boost bind would be very useful. Though I'm just looking for a way to deallocate stuff allocated by a C library.

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Re: [Boost-users] [Serialization] Linker Errors Using Unicode(Was:error C2027: useofundefinedtype'boost::serialization::extended_type_info_null<T>'?)
by Lawrence Spector 30 Nov '06

30 Nov '06

Ok. Well, I tried testarray.cpp (which contains the test_array_text_warchive test) and it doesn't build in VC7.1, with the following linker errors, if I turn on the unicode option. I simply made a new project and turned on unicode, and added the file. I don't see why that should have any issues. I have yet to try with 1.34, but I can't see a logical reason why unicode doesn't work, but non-unicode does. I'll get back with the result of 1.34, but again, 1.33.1 does not link for me. The results are as follows: ------ Build started: Project: test_array_text_archive, Configuration: Debug Win32 ------ Linking... Creating library Debug/test_array_text_archive.lib and object Debug/test_array_text_archive.exp testarray.obj : error LNK2019: unresolved external symbol "void __cdecl boost::test_tools::tt_detail::check_impl(class boost::test_tools::predicate_result const &,class boost::basic_wrap_stringstream<char> &,class boost::unit_test::basic_cstring<char const >,unsigned int,enum boost::test_tools::tt_detail::tool_level,enum boost::test_tools::tt_detail::check_type,unsigned int,...)" (?check_impl@tt_detail@test_tools@boost@@YAXABVpredicate_result@23@AAV?$ basic_wrap_stringstream@D@3@V?$basic_cstring@$$CBD@unit_test@3@IW4tool_l evel@123@W4check_type@123@IZZ) referenced in function "int __cdecl test_array<class A>(class A)" (??$test_array@VA@@@@YAHVA@@@Z) testarray.obj : error LNK2019: unresolved external symbol "public: void __thiscall boost::archive::text_oarchive_impl<class boost::archive::text_oarchive>::save(class std::basic_string<unsigned short,struct std::char_traits<unsigned short>,class std::allocator<unsigned short> > const &)" (?save@?$text_oarchive_impl@Vtext_oarchive@archive@boost@@@archive@boost @@QAEXABV?$basic_string@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@@Z ) referenced in function "public: static void __cdecl boost::archive::save_access::save_primitive<class boost::archive::text_oarchive,class std::basic_string<unsigned short,struct std::char_traits<unsigned short>,class std::allocator<unsigned short> > >(class boost::archive::text_oarchive &,class std::basic_string<unsigned short,struct std::char_traits<unsigned short>,class std::allocator<unsigned short> > const &)" (??$save_primitive@Vtext_oarchive@archive@boost@@V?$basic_string@GU?$cha r_traits@G@std@@V?$allocator@G@2@@std@@@save_access@archive@boost@@SAXAA Vtext_oarchive@12@ABV?$basic_string@GU?$char_traits@G@std@@V?$allocator@ G@2@@std@@@Z) testarray.obj : error LNK2019: unresolved external symbol "public: void __thiscall boost::archive::text_iarchive_impl<class boost::archive::text_iarchive>::load(class std::basic_string<unsigned short,struct std::char_traits<unsigned short>,class std::allocator<unsigned short> > &)" (?load@?$text_iarchive_impl@Vtext_iarchive@archive@boost@@@archive@boost @@QAEXAAV?$basic_string@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@@Z ) referenced in function "public: static void __cdecl boost::archive::load_access::load_primitive<class boost::archive::text_iarchive,class std::basic_string<unsigned short,struct std::char_traits<unsigned short>,class std::allocator<unsigned short> > >(class boost::archive::text_iarchive &,class std::basic_string<unsigned short,struct std::char_traits<unsigned short>,class std::allocator<unsigned short> > &)" (??$load_primitive@Vtext_iarchive@archive@boost@@V?$basic_string@GU?$cha r_traits@G@std@@V?$allocator@G@2@@std@@@load_access@archive@boost@@SAXAA Vtext_iarchive@12@AAV?$basic_string@GU?$char_traits@G@std@@V?$allocator@ G@2@@std@@@Z) LIBCD.lib(crt0.obj) : error LNK2019: unresolved external symbol _main referenced in function _mainCRTStartup Debug/test_array_text_archive.exe : fatal error LNK1120: 4 unresolved externals Build log was saved at "file://c:\Work\Sandbox\Boost\Serialization\test_array_text_archive\Debu g\BuildLog.htm" test_array_text_archive - 5 error(s), 0 warning(s) ---------------------- Done ---------------------- Build: 0 succeeded, 1 failed, 0 skipped -----Original Message----- From: boost-users-bounces(a)lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Robert Ramey Sent: Thursday, November 30, 2006 2:14 PM To: boost-users(a)lists.boost.org Subject: Re: [Boost-users] [Serialization] Linker Errors Using Unicode(Was:error C2027: useofundefinedtype'boost::serialization::extended_type_info_null<T>'?) Note that all tests (all 50 of them) work with all archive classes that the platform supports. It has been this way since the beginning. As far as I know there is nothing to fix. Robert Ramey Lawrence Spector wrote: > Okay, that's fair and fine. However, any explanation for the linker > errors that seem to occur only with unicode versions? > > Can anyone else try out the demo.cpp example > (http://www.boost.org/libs/serialization/example/demo.cpp) with a > unicode build, and just change the boost::archive::text_oarchive and > boost::archive::text_iarchive to use boost::archive::text_woarchive > and boost::archive::text_wiarchive, as well as using wide strings and > wide streams? I want to see if anyone else has this issue with > 1.33.1? > > Any chance this might be fixed in 1.34.0? > > Thanks, > > Lawrence > > -----Original Message----- > From: boost-users-bounces(a)lists.boost.org > [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Robert Ramey > Sent: Thursday, November 30, 2006 11:47 AM > To: boost-users(a)lists.boost.org > Subject: Re: [Boost-users] [Serialization] error C2027: use of > undefinedtype'boost::serialization::extended_type_info_null<T>'? > > Note that the library is in two parts. libboost_serialization.. > contains > code used for all types of archives while libboost_wserialization > contains > code used only for wide character archives. So applications using > wide character archives should link against BOTH libraries. > > Robert Ramey > > > > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

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Re: [Boost-users] [Serialization] Linker Errors Using Unicode (Was: error C2027: use of undefinedtype'boost::serialization::extended_type_info_null<T>'?)
by Lawrence Spector 30 Nov '06

30 Nov '06

Okay, that's fair and fine. However, any explanation for the linker errors that seem to occur only with unicode versions? Can anyone else try out the demo.cpp example (http://www.boost.org/libs/serialization/example/demo.cpp) with a unicode build, and just change the boost::archive::text_oarchive and boost::archive::text_iarchive to use boost::archive::text_woarchive and boost::archive::text_wiarchive, as well as using wide strings and wide streams? I want to see if anyone else has this issue with 1.33.1? Any chance this might be fixed in 1.34.0? Thanks, Lawrence -----Original Message----- From: boost-users-bounces(a)lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Robert Ramey Sent: Thursday, November 30, 2006 11:47 AM To: boost-users(a)lists.boost.org Subject: Re: [Boost-users] [Serialization] error C2027: use of undefinedtype'boost::serialization::extended_type_info_null<T>'? Note that the library is in two parts. libboost_serialization.. contains code used for all types of archives while libboost_wserialization contains code used only for wide character archives. So applications using wide character archives should link against BOTH libraries. Robert Ramey _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

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