I have a C++ project that uses IBPP to access a firebird database. I simply do it by including the file “all_in_one.cpp” in my project, and all went well with both VS6 (yes, I still have some of those) and VS2008.
Now I am considering using VS2010. It is compiling ok but does not link. I know VS2010 comes with a new implementation of the STL, and the linking problem obviously is around the STL.
I have tried creating a new project with VS2010, just adding the all_in_one.cpp file. It is a simple project that does not contain anything else, and it still fails to link with the same missing symbols. I can’t figure out what’s missing, incorrect. I have tried linking to the same libraries as in VS2008 (including the path). Nothing is working so far.
Here are the errors:
all_in_one.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) struct std::_Smanip<__int64> __cdecl std::setw(__int64)" (__imp_?setw@std@@YA?AU?$_Smanip@_J@1@_J@Z) referenced in function "public: char const * __thiscall IBPP::DBKey::AsString(void)const " (?AsString@DBKey@IBPP@@QBEPBDXZ)
all_in_one.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: void __thiscall std::_Container_base12::_Orphan_all(void)" (__imp_?_Orphan_all@_Container_base12@std@@QAEXXZ) referenced in function "public: class std::vector<double,class std::allocator<double> > & __thiscall std::vector<double,class std::allocator<double> >::operator=(class std::vector<double,class std::allocator<double> > const &)" (??4?$vector@NV?$allocator@N@std@@@std@@QAEAAV01@ABV01@@Z)
all_in_one.obj : error LNK2001: unresolved external symbol "public: virtual void __thiscall std::basic_streambuf<char,struct std::char_traits<char> >::_Lock(void)" (?_Lock@?$basic_streambuf@DU?$char_traits@D@std@@@std@@UAEXXZ)
all_in_one.obj : error LNK2001: unresolved external symbol "public: virtual void __thiscall std::basic_streambuf<char,struct std::char_traits<char> >::_Unlock(void)" (?_Unlock@?$basic_streambuf@DU?$char_traits@D@std@@@std@@UAEXXZ)
all_in_one.obj : error LNK2001: unresolved external symbol "protected: virtual __int64 __thiscall std::basic_streambuf<char,struct std::char_traits<char> >::showmanyc(void)" (?showmanyc@?$basic_streambuf@DU?$char_traits@D@std@@@std@@MAE_JXZ)
all_in_one.obj : error LNK2001: unresolved external symbol "protected: virtual __int64 __thiscall std::basic_streambuf<char,struct std::char_traits<char> >::xsgetn(char *,__int64)" (?xsgetn@?$basic_streambuf@DU?$char_traits@D@std@@@std@@MAE_JPAD_J@Z)
all_in_one.obj : error LNK2001: unresolved external symbol "protected: virtual __int64 __thiscall std::basic_streambuf<char,struct std::char_traits<char> >::xsputn(char const *,__int64)" (?xsputn@?$basic_streambuf@DU?$char_traits@D@std@@@std@@MAE_JPBD_J@Z)
all_in_one.obj : error LNK2001: unresolved external symbol "protected: virtual class std::basic_streambuf<char,struct std::char_traits<char> > * __thiscall std::basic_streambuf<char,struct std::char_traits<char> >::setbuf(char *,__int64)" (?setbuf@?$basic_streambuf@DU?$char_traits@D@std@@@std@@MAEPAV12@PAD_J@Z)
all_in_one.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) __int64 const std::_BADOFF" (__imp_?_BADOFF@std@@3_JB)
all_in_one.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) void __cdecl std::_Xlength_error(char const *)" (__imp_?_Xlength_error@std@@YAXPBD@Z) referenced in function "public: void __thiscall std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >::_Xlen(void)const " (?_Xlen@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QBEXXZ)
all_in_one.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) void __cdecl std::_Xout_of_range(char const *)" (__imp_?_Xout_of_range@std@@YAXPBD@Z) referenced in function "public: void __thiscall std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >::_Xran(void)const " (?_Xran@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QBEXXZ)
all_in_one.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __thiscall std::_Container_base12::~_Container_base12(void)" (__imp_??1_Container_base12@std@@QAE@XZ) referenced in function __unwindfunclet$??0?$_String_val@DV?$allocator@D@std@@@std@@QAE@V?$allocator@D@1@@Z$0
all_in_one.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __thiscall std::_Container_base12::_Container_base12(void)" (__imp_??0_Container_base12@std@@QAE@XZ) referenced in function "public: __thiscall std::_String_val<char,class std::allocator<char> >::_String_val<char,class std::allocator<char> >(class std::allocator<char>)" (??0?$_String_val@DV?$allocator@D@std@@@std@@QAE@V?$allocator@D@1@@Z)
all_in_one.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: struct std::_Iterator_base12 * * __thiscall std::_Container_base12::_Getpfirst(void)const " (__imp_?_Getpfirst@_Container_base12@std@@QBEPAPAU_Iterator_base12@2@XZ) referenced in function "protected: void __thiscall std::vector<class ibpp_internals::TransactionImpl *,class std::allocator<class ibpp_internals::TransactionImpl *> >::_Orphan_range(class ibpp_internals::TransactionImpl * *,class ibpp_internals::TransactionImpl * *)const " (?_Orphan_range@?$vector@PAVTransactionImpl@ibpp_internals@@V?$allocator@PAVTransactionImpl@ibpp_internals@@@std@@@std@@IBEXPAPAVTransactionImpl@ibpp_internals@@0@Z)
all_in_one.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __int64 __thiscall std::ios_base::width(__int64)" (__imp_?width@ios_base@std@@QAE_J_J@Z) referenced in function "class std::basic_ostream<char,struct std::char_traits<char> > & __cdecl std::operator<<<struct std::char_traits<char> >(class std::basic_ostream<char,struct std::char_traits<char> > &,char const *)" (??$?6U?$char_traits@D@std@@@std@@YAAAV?$basic_ostream@DU?$char_traits@D@std@@@0@AAV10@PBD@Z)
all_in_one.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __int64 __thiscall std::basic_streambuf<char,struct std::char_traits<char> >::sputn(char const *,__int64)" (__imp_?sputn@?$basic_streambuf@DU?$char_traits@D@std@@@std@@QAE_JPBD_J@Z) referenced in function "class std::basic_ostream<char,struct std::char_traits<char> > & __cdecl std::operator<<<struct std::char_traits<char> >(class std::basic_ostream<char,struct std::char_traits<char> > &,char const *)" (??$?6U?$char_traits@D@std@@@std@@YAAAV?$basic_ostream@DU?$char_traits@D@std@@@0@AAV10@PBD@Z)
all_in_one.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __int64 __thiscall std::ios_base::width(void)const " (__imp_?width@ios_base@std@@QBE_JXZ) referenced in function "class std::basic_ostream<char,struct std::char_traits<char> > & __cdecl std::operator<<<struct std::char_traits<char> >(class std::basic_ostream<char,struct std::char_traits<char> > &,char const *)" (??$?6U?$char_traits@D@std@@@std@@YAAAV?$basic_ostream@DU?$char_traits@D@std@@@0@AAV10@PBD@Z)
It seems your library/DLL is exporting some templated/STL stuff.
STL is not binary compatible among different compiler versions.
You need to use same compiler/linker/bitness to compile and link the DLL/EXE if STL/template is involved.