Mailman 3 July 2018 - Cplusplus-sig

Boost python undef symbols
by Servando Arboli July 14, 2018

July 14, 2018

Dear all, I’m trying to install boost python in Windows but I must be doing something wrong. The execution of b2 with python has produced a library, but when I’m trying to link I get errors related to undefined symbols. I’ve done a dumpbin /symbols with the library generated by b2, filtering the undef symbols, I get plenty of them: *$ grep UNDEF boost_python_symbols.txt* 37C 00000000 UNDEF notype () External | ??2@YAPEAX_K@Z (void * __cdecl operator new(unsigned __int64)) 37D 00000000 UNDEF notype () External | ??3@YAXPEAX@Z (void __cdecl operator delete(void *)) 37E 00000000 UNDEF notype () External | atexit 37F 00000000 UNDEF notype () External | __std_terminate 380 00000000 UNDEF notype External | __imp__invalid_parameter_noinfo_noreturn 381 00000000 UNDEF notype External | __imp_memmove 382 00000000 UNDEF notype External | __imp_PyObject_IsTrue 383 00000000 UNDEF notype External | __imp_PyUnicode_FromStringAndSize 384 00000000 UNDEF notype External | __imp_PyLong_FromLong 385 00000000 UNDEF notype External | __imp_PyLong_FromUnsignedLong 386 00000000 UNDEF notype External | __imp_PyLong_FromUnsignedLongLong 387 00000000 UNDEF notype External | __imp_PyTuple_New 388 00000000 UNDEF notype External | __imp_PyErr_Occurred 389 00000000 UNDEF notype External | __imp_PyObject_Size … … … 124 00000000 UNDEF notype () External | ?getattr@api@python@boost @@YA?AVobject@123@AEBV4123@PEBD@Z (class boost::python::api::object __cdecl boost::python::api::getattr(class boost::python::api::object const &,char const *)) 18C 00000000 UNDEF notype () External | __CxxFrameHandler3 18D 00000000 UNDEF notype () External | __GSHandlerCheck_EH 18E 00000000 UNDEF notype () External | __security_check_cookie 465 00000000 UNDEF notype External | __imp__Py_NoneStruct 466 00000000 UNDEF notype External | __imp_PyDict_Type 467 00000000 UNDEF notype External | ??_7type_info@@6B@ (const type_info::`vftable') 4A5 00000000 UNDEF notype External | __security_cookie 032 00000000 UNDEF notype () External | atexit 033 00000000 UNDEF notype () External | __std_terminate 034 00000000 UNDEF notype External | __imp_PyObject_CallFunction 035 00000000 UNDEF notype () External | ?throw_error_already_set@python@boost@@YAXXZ (void __cdecl boost::python::throw_error_already_set(void)) 04C 00000000 UNDEF notype () External | __CxxFrameHandler3 0AC 00000000 UNDEF notype External | __imp__Py_NoneStruct 0AD 00000000 UNDEF notype External | __imp_PyLong_Type 0BE 00000000 UNDEF notype () External | atexit 0BF 00000000 UNDEF notype () External | __std_terminate 0C0 00000000 UNDEF notype External | __imp_PyLong_AsSsize_t 0C1 00000000 UNDEF notype External | __imp_PyLong_FromLongLong 0C2 00000000 UNDEF notype External | __imp_PyList_New 0C3 00000000 UNDEF notype External | __imp_PyList_Insert 0C4 00000000 UNDEF notype External | __imp_PyList_Append 0C5 00000000 UNDEF notype External | __imp_PyList_Sort 0C6 00000000 UNDEF notype External | __imp_PyList_Reverse 0C7 00000000 UNDEF notype External | __imp_PyErr_Occurred 0C8 00000000 UNDEF notype External | __imp_PyEval_CallFunction 0C9 00000000 UNDEF notype External | __imp_PyObject_Call 0CA 00000000 UNDEF notype External | __imp_PyObject_CallFunction 0CC 00000000 UNDEF notype () External | ?lookup@registry @converter@python@boost@@YAAEBUregistration@234@Utype_info@34@@Z (struct boost::python::converter::registration const & __cdecl boost::python::converter::registry::lookup(struct boost::python::type_info)) 0CD 00000000 UNDEF notype () External | ?throw_error_already_set@python@boost@@YAXXZ (void __cdecl boost::python::throw_error_already_set(void)) 0E7 00000000 UNDEF notype () External | ?getattr@api@python@boost @@YA?AVobject@123@AEBV4123@PEBD@Z (class boost::python::api::object __cdecl boost::python::api::getattr(class boost::python::api::object const &,char const *)) 12E 00000000 UNDEF notype () External | __CxxFrameHandler3 38C 00000000 UNDEF notype External | __imp__Py_NoneStruct 38D 00000000 UNDEF notype External | __imp_PyList_Type 38E 00000000 UNDEF notype External | ??_7type_info@@6B@ (const type_info::`vftable') When I’ve tried to compile the quickstart example with the following command, I get the unresolved symbols errors *C:\lib\boost_1_67_0\libs\python\example\quickstart>CL /LD /MD /I"C:\lib\boost_1_67_0" /I"C:\ProgramData\Anaconda3\include" extending.cpp /link /DLL /libpath:"C:\lib\boost_1_67_0\stage\lib" /libpath:"C:\ProgramData\Anaconda3\libs"* extending.cpp C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\INCLUDE\xlocale(341): warning C4530: C++ exception handler used, but unwind semantics are not enabled. Specify /EHsc C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\INCLUDE\exception(359): warning C4577: 'noexcept' used with no exception handling mode specified; termination on exception is not guaranteed. Specify /EHsc Microsoft (R) Incremental Linker Version 14.00.24210.0 Copyright (C) Microsoft Corporation. All rights reserved. /out:extending.dll /dll /implib:extending.lib /DLL /libpath:C:\lib\boost_1_67_0\stage\lib /libpath:C:\ProgramData\Anaconda3\libs extending.obj Creating library extending.lib and object extending.exp extending.obj : warning LNK4217: locally defined symbol ??0instance_holder@python@boost@@QEAA@XZ (public: __cdecl boost::python::instance_holder::instance_holder(void)) imported in function "public: __cdecl boost::python::objects::value_holder<class `anonymous namespace'::hello>::value_holder<class `anonymous namespace'::hello><struct boost::python::objects::reference_to_value<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > > >(struct _object *,struct boost::python::objects::reference_to_value<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > >)" (??$?0U?$reference_to_value@V?$basic_string@DU ?$char_traits@D@std@@V?$allocator@D@2@@std@@@objects@python@boost@ @@?$value_holder@Vhello@?A0xc2d1617d@@@objects@python@boost@ @QEAA@PEAU_object@@U?$reference_to_value@V?$basic_string@DU?$char_traits@D @std@@V?$allocator@D@2@@std@@@123@@Z) extending.obj : warning LNK4217: locally defined symbol ??1instance_holder@python@boost@@UEAA@XZ (public: virtual __cdecl boost::python::instance_holder::~instance_holder(void)) imported in function "public: virtual __cdecl boost::python::objects::value_holder<class `anonymous namespace'::hello>::~value_holder<class `anonymous namespace'::hello>(void)" (??1?$value_holder@Vhello@?A0xc2d1617d@ @@objects@python@boost@@UEAA@XZ) extending.obj : warning LNK4217: locally defined symbol ?install@instance_holder@python@boost@@QEAAXPEAU_object@@@Z (public: void __cdecl boost::python::instance_holder::install(struct _object *)) imported in function "public: static struct _object * __cdecl boost::python::objects::make_instance_impl<class `anonymous namespace'::hello,struct boost::python::objects::value_holder<class `anonymous namespace'::hello>,struct boost::python::objects::make_instance<class `anonymous namespace'::hello,struct boost::python::objects::value_holder<class `anonymous namespace'::hello> > >::execute<class boost::reference_wrapper<class `anonymous namespace'::hello const > const >(class boost::reference_wrapper<class `anonymous namespace'::hello const > const &)" (??$execute@$$CBV?$reference_wrapper@$$CBVhello@?A0xc2d1617d@ @@boost@@@?$make_instance_impl@Vhello@?A0xc2d1617d@@U?$value_holder@Vhello @?A0xc2d1617d@@@objects@python@boost@@U?$make_instance@Vhello@?A0xc2d1617d@ @U?$value_holder@Vhello@?A0xc2d1617d@@@objects@python@boost@@@456@ @objects@python@boost@@SAPEAU_object@@AEBV?$reference_wrapper@$$CBVhello@ ?A0xc2d1617d@@@3@@Z) extending.obj : warning LNK4217: locally defined symbol ?allocate@instance_holder@python@boost@@SAPEAXPEAU_object@@_K1@Z (public: static void * __cdecl boost::python::instance_holder::allocate(struct _object *,unsigned __int64,unsigned __int64)) imported in function "public: static void __cdecl boost::python::objects::make_holder<1>::apply<struct boost::python::objects::value_holder<class `anonymous namespace'::hello>,struct boost::mpl::vector1<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > > >::execute(struct _object *,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >)" (?execute@?$apply@U?$value_holder@Vhello @?A0xc2d1617d@@@objects@python@boost@@U?$vector1@V?$basic_string@DU ?$char_traits@D@std@@V?$allocator@D@2@@std@@@mpl@4@@?$make_holder@ $00@objects@python@boost@@SAXPEAU_object@@V?$basic_string@DU?$char_traits@D @std@@V?$allocator@D@2@@std@@@Z) extending.obj : warning LNK4217: locally defined symbol ?deallocate@instance_holder@python@boost@@SAXPEAU_object@@PEAX@Z (public: static void __cdecl boost::python::instance_holder::deallocate(struct _object *,void *)) imported in function __catch$?execute@?$apply@U ?$value_holder@Vhello@?A0xc2d1617d@@@objects@python@boost@@U?$vector1@V ?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@mpl@4 @@?$make_holder@$00@objects@python@boost@@SAXPEAU_object@@V?$basic_string@DU ?$char_traits@D@std@@V?$allocator@D@2@@std@@@Z$0 extending.obj : warning LNK4217: locally defined symbol ?lookup@registry @converter@python@boost@@YAAEBUregistration@234@Utype_info@34@@Z (struct boost::python::converter::registration const & __cdecl boost::python::converter::registry::lookup(struct boost::python::type_info)) imported in function "struct boost::python::converter::registration const & __cdecl boost::python::converter::detail::registry_lookup2<class `anonymous namespace'::hello const >(class `anonymous namespace'::hello const & (__cdecl*)(void))" (??$registry_lookup2@$$CBVhello@?A0xc2d1617d@ @@detail@converter@python@boost@@YAAEBUregistration@123@P6AAEBVhello@ ?A0xc2d1617d@@XZ@Z) extending.obj : warning LNK4217: locally defined symbol ?query@registry @converter@python@boost@@YAPEBUregistration@234@Utype_info@34@@Z (struct boost::python::converter::registration const * __cdecl boost::python::converter::registry::query(struct boost::python::type_info)) imported in function "public: static struct _typeobject const * __cdecl boost::python::converter::expected_pytype_for_arg<class `anonymous namespace'::hello &>::get_pytype(void)" (?get_pytype@ ?$expected_pytype_for_arg@AEAVhello@?A0xc2d1617d@@@converter@python@boost@ @SAPEBU_typeobject@@XZ) extending.obj : warning LNK4217: locally defined symbol ?insert@registry @converter@python@boost@@YAXP6APEAU_object@@PEBX@ZUtype_info @34@P6APEBU_typeobject@@XZ@Z (void __cdecl boost::python::converter::registry::insert(struct _object * (__cdecl*)(void const *),struct boost::python::type_info,struct _typeobject const * (__cdecl*)(void))) imported in function "public: __cdecl boost::python::to_python_converter<class `anonymous namespace'::hello,struct boost::python::objects::class_cref_wrapper<class `anonymous namespace'::hello,struct boost::python::objects::make_instance<class `anonymous namespace'::hello,struct boost::python::objects::value_holder<class `anonymous namespace'::hello> > >,1>::to_python_converter<class `anonymous namespace'::hello,struct boost::python::objects::class_cref_wrapper<class `anonymous namespace'::hello,struct boost::python::objects::make_instance<class `anonymous namespace'::hello,struct boost::python::objects::value_holder<class `anonymous namespace'::hello> > >,1>(void)" (??0?$to_python_converter@Vhello @?A0xc2d1617d@@U?$class_cref_wrapper@Vhello@?A0xc2d1617d@ @U?$make_instance@Vhello@?A0xc2d1617d@@U?$value_holder@Vhello@?A0xc2d1617d@ @@objects@python@boost@@@objects@python@boost@@@objects@python@boost@ @$00@python@boost@@QEAA@XZ) extending.obj : warning LNK4217: locally defined symbol ?insert@registry @converter@python@boost@@YAXP6APEAXPEAU_object@ @@ZP6AX0PEAUrvalue_from_python_stage1_data@234@@ZUtype_info@34 @P6APEBU_typeobject@@XZ@Z (void __cdecl boost::python::converter::registry::insert(void * (__cdecl*)(struct _object *),void (__cdecl*)(struct _object *,struct boost::python::converter::rvalue_from_python_stage1_data *),struct boost::python::type_info,struct _typeobject const * (__cdecl*)(void))) imported in function "public: __cdecl boost::python::converter::shared_ptr_from_python<class `anonymous namespace'::hello,class boost::shared_ptr>::shared_ptr_from_python<class `anonymous namespace'::hello,class boost::shared_ptr>(void)" (??0?$shared_ptr_from_python@Vhello@?A0xc2d1617d@@Vshared_ptr@boost @@@converter@python@boost@@QEAA@XZ) extending.obj : warning LNK4217: locally defined symbol ?get_class_object@registration@converter@python@boost@@QEBAPEAU_typeobject@@XZ (public: struct _typeobject * __cdecl boost::python::converter::registration::get_class_object(void)const ) imported in function "public: static struct _typeobject * __cdecl boost::python::objects::make_instance<class `anonymous namespace'::hello,struct boost::python::objects::value_holder<class `anonymous namespace'::hello> >::get_class_object<class boost::reference_wrapper<class `anonymous namespace'::hello const > const >(class boost::reference_wrapper<class `anonymous namespace'::hello const > const &)" (??$get_class_object@$$CBV?$reference_wrapper@$$CBVhello@ ?A0xc2d1617d@@@boost@@@?$make_instance@Vhello@?A0xc2d1617d@ @U?$value_holder@Vhello@?A0xc2d1617d@@@objects@python@boost@@@objects@python @boost@@SAPEAU_typeobject@@AEBV?$reference_wrapper@$$CBVhello@?A0xc2d1617d@ @@3@@Z) extending.obj : warning LNK4217: locally defined symbol ?expected_from_python_type@registration@converter@python@boost@ @QEBAPEBU_typeobject@@XZ (public: struct _typeobject const * __cdecl boost::python::converter::registration::expected_from_python_type(void)const ) imported in function "public: static struct _typeobject const * __cdecl boost::python::converter::expected_from_python_type_direct<class `anonymous namespace'::hello>::get_pytype(void)" (?get_pytype@ ?$expected_from_python_type_direct@Vhello@?A0xc2d1617d@@@converter@python @boost@@SAPEBU_typeobject@@XZ) extending.obj : warning LNK4217: locally defined symbol ?throw_error_already_set@python@boost@@YAXXZ (void __cdecl boost::python::throw_error_already_set(void)) imported in function "struct _object * __cdecl boost::python::expect_non_null<struct _object>(struct _object *)" (??$expect_non_null@U_object@@@python@boost@@YAPEAU_object@ @PEAU2@@Z) extending.obj : warning LNK4217: locally defined symbol ??0shared_ptr_deleter@converter@python@boost@@QEAA@V?$handle@U_object@@@23@@Z (public: __cdecl boost::python::converter::shared_ptr_deleter::shared_ptr_deleter(class boost::python::handle<struct _object>)) imported in function "private: static void __cdecl boost::python::converter::shared_ptr_from_python<class `anonymous namespace'::hello,class boost::shared_ptr>::construct(struct _object *,struct boost::python::converter::rvalue_from_python_stage1_data *)" (?construct@?$shared_ptr_from_python@Vhello@?A0xc2d1617d@ @Vshared_ptr@boost@@@converter@python@boost@@CAXPEAU_object@ @PEAUrvalue_from_python_stage1_data@234@@Z) extending.obj : warning LNK4217: locally defined symbol ??1shared_ptr_deleter@converter@python@boost@@QEAA@XZ (public: __cdecl boost::python::converter::shared_ptr_deleter::~shared_ptr_deleter(void)) imported in function "public: __cdecl boost::detail::shared_count::shared_count<void *,struct boost::python::converter::shared_ptr_deleter>(void *,struct boost::python::converter::shared_ptr_deleter)" (??$?0PEAXUshared_ptr_deleter@converter@python@boost@@@shared_count@detail @boost@@QEAA@PEAXUshared_ptr_deleter@converter@python@2@@Z) extending.obj : warning LNK4217: locally defined symbol ??Rshared_ptr_deleter@converter@python@boost@@QEAAXPEBX@Z (public: void __cdecl boost::python::converter::shared_ptr_deleter::operator()(void const *)) imported in function "public: __cdecl boost::detail::shared_count::shared_count<void *,struct boost::python::converter::shared_ptr_deleter>(void *,struct boost::python::converter::shared_ptr_deleter)" (??$?0PEAXUshared_ptr_deleter@converter@python@boost@@@shared_count@detail @boost@@QEAA@PEAXUshared_ptr_deleter@converter@python@2@@Z) extending.obj : warning LNK4217: locally defined symbol ?get_lvalue_from_python@converter@python@boost@@YAPEAXPEAU_object@ @AEBUregistration@123@@Z (void * __cdecl boost::python::converter::get_lvalue_from_python(struct _object *,struct boost::python::converter::registration const &)) imported in function "public: __cdecl boost::python::converter::reference_arg_from_python<class `anonymous namespace'::hello &>::reference_arg_from_python<class `anonymous namespace'::hello &>(struct _object *)" (??0?$reference_arg_from_python@AEAVhello@?A0xc2d1617d@@@converter@python @boost@@QEAA@PEAU_object@@@Z) extending.obj : warning LNK4217: locally defined symbol ?rvalue_from_python_stage1@converter@python@boost @@YA?AUrvalue_from_python_stage1_data@123@PEAU_object@@AEBUregistration@123@@Z (struct boost::python::converter::rvalue_from_python_stage1_data __cdecl boost::python::converter::rvalue_from_python_stage1(struct _object *,struct boost::python::converter::registration const &)) imported in function "public: __cdecl boost::python::converter::arg_rvalue_from_python<class `anonymous namespace'::hello const &>::arg_rvalue_from_python<class `anonymous namespace'::hello const &>(struct _object *)" (??0?$arg_rvalue_from_python@AEBVhello@?A0xc2d1617d@@@converter@python @boost@@QEAA@PEAU_object@@@Z) extending.obj : warning LNK4217: locally defined symbol ??1py_function_impl_base@objects@python@boost@@UEAA@XZ (public: virtual __cdecl boost::python::objects::py_function_impl_base::~py_function_impl_base(void)) imported in function "public: virtual __cdecl boost::python::objects::caller_py_function_impl<struct boost::python::detail::caller<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > (__cdecl*)(class `anonymous namespace'::hello const &),struct boost::python::default_call_policies,struct boost::mpl::vector2<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,class `anonymous namespace'::hello const &> > >::~caller_py_function_impl<struct boost::python::detail::caller<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > (__cdecl*)(class `anonymous namespace'::hello const &),struct boost::python::default_call_policies,struct boost::mpl::vector2<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,class `anonymous namespace'::hello const &> > >(void)" (??1?$caller_py_function_impl@U ?$caller@P6A?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@ @AEBVhello@?A0xc2d1617d@@@ZUdefault_call_policies@python@boost@@U?$vector2@V ?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@AEBVhello@ ?A0xc2d1617d@@@mpl@7@@detail@python@boost@@@objects@python@boost@@UEAA@XZ) extending.obj : warning LNK4217: locally defined symbol ??0py_function_impl_base@objects@python@boost@@QEAA@XZ (public: __cdecl boost::python::objects::py_function_impl_base::py_function_impl_base(void)) imported in function "public: __cdecl boost::python::objects::caller_py_function_impl<struct boost::python::detail::caller<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > (__cdecl*)(class `anonymous namespace'::hello const &),struct boost::python::default_call_policies,struct boost::mpl::vector2<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,class `anonymous namespace'::hello const &> > >::caller_py_function_impl<struct boost::python::detail::caller<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > (__cdecl*)(class `anonymous namespace'::hello const &),struct boost::python::default_call_policies,struct boost::mpl::vector2<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,class `anonymous namespace'::hello const &> > >(struct boost::python::detail::caller<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > (__cdecl*)(class `anonymous namespace'::hello const &),struct boost::python::default_call_policies,struct boost::mpl::vector2<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,class `anonymous namespace'::hello const &> > const &)" (??0?$caller_py_function_impl@U ?$caller@P6A?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@ @AEBVhello@?A0xc2d1617d@@@ZUdefault_call_policies@python@boost@@U?$vector2@V ?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@AEBVhello@ ?A0xc2d1617d@@@mpl@7@@detail@python@boost@@@objects@python@boost@@QEAA@AEBU ?$caller@P6A?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@ @AEBVhello@?A0xc2d1617d@@@ZUdefault_call_policies@python@boost@@U?$vector2@V ?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@AEBVhello@ ?A0xc2d1617d@@@mpl@7@@detail@23@@Z) extending.obj : warning LNK4217: locally defined symbol ?add_to_namespace@objects@python@boost@@YAXAEBVobject@api@23@PEBD01@Z (void __cdecl boost::python::objects::add_to_namespace(class boost::python::api::object const &,char const *,class boost::python::api::object const &,char const *)) imported in function "private: void __cdecl boost::python::class_<class `anonymous namespace'::hello,struct boost::python::detail::not_specified,struct boost::python::detail::not_specified,struct boost::python::detail::not_specified>::def_impl<class `anonymous namespace'::hello,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > (__cdecl*)(class A0xc2d1617d::hello const &),struct boost::python::detail::def_helper<char const *,struct boost::python::detail::not_specified,struct boost::python::detail::not_specified,struct boost::python::detail::not_specified> >(class `anonymous namespace'::hello *,char const *,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > (__cdecl*)(class A0xc2d1617d::hello const &),struct boost::python::detail::def_helper<char const *,struct boost::python::detail::not_specified,struct boost::python::detail::not_specified,struct boost::python::detail::not_specified> const &,...)" (??$def_impl@Vhello @?A0xc2d1617d@@P6A?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@ @std@@AEBV12@@ZU?$def_helper@PEBDUnot_specified@detail@python@boost@ @U1234@U1234@@detail@python@boost@@@?$class_@Vhello@?A0xc2d1617d@ @Unot_specified@detail@python@boost@@U3456@U3456@@python@boost @@AEAAXPEAVhello@?A0xc2d1617d@@PEBDP6A?AV?$basic_string@DU?$char_traits@D @std@@V?$allocator@D@2@@std@@AEBV34@@ZAEBU?$def_helper@PEBDUnot_specified @detail@python@boost@@U1234@U1234@@detail@12@ZZ) extending.obj : warning LNK4217: locally defined symbol ??0class_base@objects@python@boost@@QEAA@PEBD_KQEBUtype_info@23@0@Z (public: __cdecl boost::python::objects::class_base::class_base(char const *,unsigned __int64,struct boost::python::type_info const * const,char const *)) imported in function "public: __cdecl boost::python::class_<class `anonymous namespace'::hello,struct boost::python::detail::not_specified,struct boost::python::detail::not_specified,struct boost::python::detail::not_specified>::class_<class `anonymous namespace'::hello,struct boost::python::detail::not_specified,struct boost::python::detail::not_specified,struct boost::python::detail::not_specified><class boost::python::init<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_> >(char const *,struct boost::python::init_base<class boost::python::init<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_> > const &)" (??$?0V?$init@V ?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@Uvoid_@mpl @boost@@U345@U345@U345@U345@U345@U345@U345@U345@U345@U345@U345@U345@U345@ @python@boost@@@?$class_@Vhello@?A0xc2d1617d@@Unot_specified@detail @python@boost@@U3456@U3456@@python@boost@@QEAA@PEBDAEBU?$init_base@V?$init@V ?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@Uvoid_@mpl @boost@@U345@U345@U345@U345@U345@U345@U345@U345@U345@U345@U345@U345@U345@ @python@boost@@@12@@Z) extending.obj : warning LNK4217: locally defined symbol ?set_instance_size@class_base@objects@python@boost@@IEAAX_K@Z (protected: void __cdecl boost::python::objects::class_base::set_instance_size(unsigned __int64)) imported in function "private: void __cdecl boost::python::class_<class `anonymous namespace'::hello,struct boost::python::detail::not_specified,struct boost::python::detail::not_specified,struct boost::python::detail::not_specified>::initialize<struct boost::python::init_base<class boost::python::init<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_> > >(struct boost::python::init_base<class boost::python::init<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_,struct boost::mpl::void_> > const &)" (??$initialize@U ?$init_base@V?$init@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@ @std@@Uvoid_@mpl@boost@@U345@U345@U345@U345@U345@U345@U345@U345@U345@U345 @U345@U345@U345@@python@boost@@@python@boost@@@?$class_@Vhello@?A0xc2d1617d@ @Unot_specified@detail@python@boost@@U3456@U3456@@python@boost @@AEAAXAEBU?$init_base@V?$init@V?$basic_string@DU?$char_traits@D@std@ @V?$allocator@D@2@@std@@Uvoid_@mpl@boost@@U345@U345@U345@U345@U345@U345 @U345@U345@U345@U345@U345@U345@U345@@python@boost@@@12@@Z) extending.obj : warning LNK4217: locally defined symbol ?function_object@objects@python@boost@@YA?AVobject@api@23@AEBUpy_function @123@AEBU?$pair@PEBUkeyword@detail@python@boost@@PEBU1234@@std@@@Z (class boost::python::api::object __cdecl boost::python::objects::function_object(struct boost::python::objects::py_function const &,struct std::pair<struct boost::python::detail::keyword const *,struct boost::python::detail::keyword const *> const &)) imported in function "class boost::python::api::object __cdecl boost::python::detail::make_function_aux<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > (__cdecl*)(class `anonymous namespace'::hello const &),struct boost::python::default_call_policies,struct boost::mpl::vector2<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,class `anonymous namespace'::hello const &>,struct boost::mpl::int_<0> >(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > (__cdecl*)(class `anonymous namespace'::hello const &),struct boost::python::default_call_policies const &,struct boost::mpl::vector2<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,class `anonymous namespace'::hello const &> const &,struct std::pair<struct boost::python::detail::keyword const *,struct boost::python::detail::keyword const *> const &,struct boost::mpl::int_<0>)" (??$make_function_aux@P6A?AV?$basic_string@DU ?$char_traits@D@std@@V?$allocator@D@2@@std@@AEBVhello@?A0xc2d1617d@ @@ZUdefault_call_policies@python@boost@@U?$vector2@V?$basic_string@DU ?$char_traits@D@std@@V?$allocator@D@2@@std@@AEBVhello@?A0xc2d1617d@@@mpl@7 @U?$int_@$0A@@97@@detail@python@boost@@YA?AVobject@api@12@P6A ?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@AEBVhello@ ?A0xc2d1617d@@@ZAEBUdefault_call_policies@12@AEBU?$vector2@V ?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@AEBVhello@ ?A0xc2d1617d@@@mpl@2@AEBU?$pair@PEBUkeyword@detail@python@boost@@PEBU1234@ @6@U?$int_@$0A@@mpl@2@@Z) extending.obj : warning LNK4217: locally defined symbol ?function_object@objects@python@boost@@YA?AVobject@api@23@AEBUpy_function @123@@Z (class boost::python::api::object __cdecl boost::python::objects::function_object(struct boost::python::objects::py_function const &)) imported in function "class boost::python::api::object __cdecl boost::python::detail::make_function_aux<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > (__cdecl*)(class `anonymous namespace'::hello const &),struct boost::python::default_call_policies,struct boost::mpl::vector2<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,class `anonymous namespace'::hello const &> >(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > (__cdecl*)(class `anonymous namespace'::hello const &),struct boost::python::default_call_policies const &,struct boost::mpl::vector2<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,class `anonymous namespace'::hello const &> const &)" (??$make_function_aux@P6A ?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@AEBVhello@ ?A0xc2d1617d@@@ZUdefault_call_policies@python@boost@@U?$vector2@V ?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@AEBVhello@ ?A0xc2d1617d@@@mpl@7@@detail@python@boost@@YA?AVobject@api@12@P6A ?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@AEBVhello@ ?A0xc2d1617d@@@ZAEBUdefault_call_policies@12@AEBU?$vector2@V ?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@AEBVhello@ ?A0xc2d1617d@@@mpl@2@@Z) extending.obj : warning LNK4217: locally defined symbol ?copy_class_object@objects@python@boost@@YAXAEBUtype_info@23@0@Z (void __cdecl boost::python::objects::copy_class_object(struct boost::python::type_info const &,struct boost::python::type_info const &)) imported in function "private: static void __cdecl boost::python::objects::class_metadata<class `anonymous namespace'::hello,struct boost::python::detail::not_specified,struct boost::python::detail::not_specified,struct boost::python::detail::not_specified>::maybe_register_class_to_python<class `anonymous namespace'::hello>(class `anonymous namespace'::hello *,struct boost::mpl::bool_<0>)" (??$maybe_register_class_to_python@Vhello @?A0xc2d1617d@@@?$class_metadata@Vhello@?A0xc2d1617d@@Unot_specified@detail @python@boost@@U3456@U3456@@objects@python@boost@@CAXPEAVhello@?A0xc2d1617d@ @U?$bool_@$0A@@mpl@3@@Z) extending.obj : warning LNK4217: locally defined symbol ?init_module@detail @python@boost@@YAPEAU_object@@AEAUPyModuleDef@@P6AXXZ@Z (struct _object * __cdecl boost::python::detail::init_module(struct PyModuleDef &,void (__cdecl*)(void))) imported in function PyInit_extending extending.obj : warning LNK4217: locally defined symbol ?scope_setattr_doc@detail@python@boost@@YAXPEBDAEBVobject@api@23@0@Z (void __cdecl boost::python::detail::scope_setattr_doc(char const *,class boost::python::api::object const &,char const *)) imported in function "void __cdecl boost::python::def<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > (__cdecl*)(class `anonymous namespace'::hello const &)>(char const *,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > (__cdecl*)(class `anonymous namespace'::hello const &))" (??$def@P6A?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@ @std@@AEBVhello@?A0xc2d1617d@@@Z@python@boost@ @YAXPEBDP6A?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@ @AEBVhello@?A0xc2d1617d@@@Z@Z) extending.obj : *error LNK2019:* unresolved external symbol "__declspec(dllimport) void * __cdecl boost::python::objects::find_static_type(void *,struct boost::python::type_info,struct boost::python::type_info)" (__imp_?find_static_type@objects@python@boost@@YAPEAXPEAXUtype_info@23@1@Z) referenced in function "private: virtual void * __cdecl boost::python::objects::value_holder<class `anonymous namespace'::hello>::holds(struct boost::python::type_info,bool)" (?holds@ ?$value_holder@Vhello@?A0xc2d1617d@@@objects@python@boost@ @EEAAPEAXUtype_info@34@_N@Z) extending.obj : *error LNK2019:* unresolved external symbol "void __cdecl boost::throw_exception(class std::exception const &)" (?throw_exception@boost@@YAXAEBVexception@std@@@Z) referenced in function "public: __cdecl boost::detail::shared_count::shared_count<void *,struct boost::python::converter::shared_ptr_deleter>(void *,struct boost::python::converter::shared_ptr_deleter)" (??$?0PEAXUshared_ptr_deleter@converter@python@boost@@@shared_count@detail @boost@@QEAA@PEAXUshared_ptr_deleter@converter@python@2@@Z) extending.obj : *error LNK2019:* unresolved external symbol "__declspec(dllimport) public: __cdecl boost::python::converter::shared_ptr_deleter::shared_ptr_deleter(struct boost::python::converter::shared_ptr_deleter const &)" (__imp_??0shared_ptr_deleter@converter@python@boost@@QEAA@AEBU0123@@Z) referenced in function "public: __cdecl std::_Compressed_pair<struct boost::python::converter::shared_ptr_deleter,void *,0>::_Compressed_pair<struct boost::python::converter::shared_ptr_deleter,void *,0><struct boost::python::converter::shared_ptr_deleter &,void * &>(struct std::_One_then_variadic_args_t,struct boost::python::converter::shared_ptr_deleter &,void * &)" (??$?0AEAUshared_ptr_deleter@converter@python@boost@@AEAPEAX@ ?$_Compressed_pair@Ushared_ptr_deleter@converter@python@boost@@PEAX$0A@@std@ @QEAA@U_One_then_variadic_args_t@1@AEAUshared_ptr_deleter@converter@python @boost@@AEAPEAX@Z) extending.obj : *error LNK2019:* unresolved external symbol "__declspec(dllimport) public: __cdecl boost::python::objects::class_base::~class_base(void)" (__imp_??1class_base@objects@python@boost@@QEAA@XZ) referenced in function "public: __cdecl boost::python::class_<class `anonymous namespace'::hello,struct boost::python::detail::not_specified,struct boost::python::detail::not_specified,struct boost::python::detail::not_specified>::~class_<class `anonymous namespace'::hello,struct boost::python::detail::not_specified,struct boost::python::detail::not_specified,struct boost::python::detail::not_specified>(void)" (??1?$class_@Vhello @?A0xc2d1617d@@Unot_specified@detail@python@boost@@U3456@U3456@@python@boost @@QEAA@XZ) extending.obj : *error LNK2019:* unresolved external symbol "__declspec(dllimport) void __cdecl boost::python::objects::register_dynamic_id_aux(struct boost::python::type_info,struct std::pair<void *,struct boost::python::type_info> (__cdecl*)(void *))" (__imp_?register_dynamic_id_aux@objects@python@boost@@YAXUtype_info@23 @P6A?AU?$pair@PEAXUtype_info@python@boost@@@std@@PEAX@Z@Z) referenced in function "void __cdecl boost::python::objects::register_dynamic_id<class `anonymous namespace'::hello>(class `anonymous namespace'::hello *)" (??$register_dynamic_id@Vhello@?A0xc2d1617d@@@objects@python@boost@ @YAXPEAVhello@?A0xc2d1617d@@@Z) extending.dll : fatal error LNK1120: 5 unresolved externals Finally, this is the output that I get when I follow the example of the documentation: *C:\lib\boost_1_67_0\libs\python\example\quickstart>bjam toolset=msvc --verbose-test -a test* warning: no Python configured in user-config.jam warning: will use default configuration ...found 34 targets... ...updating 12 targets... msvc.write-setup-script ..\bin\standalone\msvc\msvc-14.0\msvc-setup.bat compile-c-c++ extending.obj call "..\bin\standalone\msvc\msvc-14.0\msvc-setup.bat" x86 >nul cl /Zm800 -nologo @"extending.obj.rsp" ...failed compile-c-c++ extending.obj... ...skipped <p.>extending.pyd for lack of <p.>extending.obj... ...skipped <p.>test_ext for lack of <p.>extending.pyd... compile-c-c++ embedding.obj call "..\bin\standalone\msvc\msvc-14.0\msvc-setup.bat" x86 >nul cl /Zm800 -nologo @"embedding.obj.rsp" ...failed compile-c-c++ embedding.obj... ...skipped <p.>test_embed.exe for lack of <p.>embedding.obj... ...skipped <p.>test_embed.run for lack of <p.>test_embed.exe... ...failed updating 2 targets... ...skipped 6 targets... ...updated 2 targets... I would appreciate if somebody can give some clues on how to solve this issue. Thanks in advance,

2 1

How to derive a python class from a C++ base abstract class [Boost.python]
by Danny C July 10, 2018

July 10, 2018

Hi, I am trying to build a hybrid system for exposing my C++ library to python and some other languages. Use case: Expose certain C++ abstract classes to be extended in python. A different exposed concrete class instance uses the methods from extended classes as callbacks Q1: I want to derive a python class whose base class is an ABSTRACT class written in C++. How do I do this. I've read many threads and similar questions but most of them are concerning SWIG. I want to use boost.python for my purpose. Any help on this is really appreciated. Q2: How do I implement callbacks from C++ to python i.e. my callback function is written in python. Thanks iowax

2 1

map_indexing_suite for boost::container::flat_map, std::map, std::unordered_amp
by MM July 9, 2018

July 9, 2018

Hello, I've tried to adapt using myfm = boost::container::flat_map<const T*, V>; with boost::python::map_indexing_suite class_< myfm, myfm* >("myfm") .def( map_indexing_suite<myfm>{} ) ; I get a compile errors: /usr/include/boost/python/detail/invoke.hpp:75:14: error: no match for call > to ‘(const > boost::python::detail::specify_a_return_value_policy_to_wrap_functions_returning<const > T*>) (const T*)’ > ... > Caller = boost::python::detail::caller<const T* (*)(std::pair<const T*, > V>&), default_call_policies ...> I would suspect that there is some function that returns the key_type of the flat_map and takes a single argument of the value_type, but I can't find any. If there's one, I would need pick a return value policy for it. As a matter of fact, I've switched to std::unordered_map and std::map, and I am encountering the same problem MM

1 0