[HELP]linker errors when adding just 1 line of OgreNewt code

hi,

i have been using OgreNewet for a few weeks now with no problems. previously i was using the Ogre example framework, but i have just re-written my app so that it does not use this, ie I implement all the functions to kick start Ogre myself.

everything is good until i add OgreNewt code (just mWorld->setWorldSize in the createScene function), at which point i get a massive list of linker errors which i cant make sense of. can someone help me please?

thank you!


Linking...
msvcprtd.lib(MSVCP71D.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?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAE@XZ) already defined in Main.obj
msvcprtd.lib(MSVCP71D.dll) : error LNK2005: "public: __thiscall std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &)" (??0?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAE@ABV01@@Z) already defined in Application.obj
msvcprtd.lib(MSVCP71D.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 *)" (??0?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAE@PBD@Z) already defined in Application.obj
msvcprtd.lib(MSVCP71D.dll) : error LNK2005: "public: int __thiscall std::ios_base::width(int)" (?width@ios_base@std@@QAEHH@Z) already defined in Application.obj
msvcprtd.lib(MSVCP71D.dll) : error LNK2005: "public: void __thiscall std::basic_ios<char,struct std::char_traits<char> >::setstate(int,bool)" (?setstate@?$basic_ios@DU?$char_traits@D@std@@@std@@QAEXH_N@Z) already defined in Application.obj
msvcprtd.lib(MSVCP71D.dll) : error LNK2005: "public: class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > & __thiscall std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >::append(unsigned int,char)" (?append@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAEAAV12@ID@Z) already defined in Application.obj
msvcprtd.lib(MSVCP71D.dll) : error LNK2005: "public: static char __cdecl std::char_traits<char>::to_char_type(int const &)" (?to_char_type@?$char_traits@D@std@@SADABH@Z) already defined in Application.obj
msvcprtd.lib(MSVCP71D.dll) : error LNK2005: "public: static bool __cdecl std::char_traits<char>::eq_int_type(int const &,int const &)" (?eq_int_type@?$char_traits@D@std@@SA_NABH0@Z) already defined in Application.obj
msvcprtd.lib(MSVCP71D.dll) : error LNK2005: "public: static int __cdecl std::char_traits<char>::eof(void)" (?eof@?$char_traits@D@std@@SAHXZ) already defined in Application.obj
msvcprtd.lib(MSVCP71D.dll) : error LNK2005: "public: class std::basic_streambuf<char,struct std::char_traits<char> > * __thiscall std::basic_ios<char,struct std::char_traits<char> >::rdbuf(void)const " (?rdbuf@?$basic_ios@DU?$char_traits@D@std@@@std@@QBEPAV?$basic_streambuf@DU?$char_traits@D@std@@@2@XZ) already defined in Application.obj
msvcprtd.lib(MSVCP71D.dll) : error LNK2005: "public: unsigned int __thiscall std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >::max_size(void)const " (?max_size@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QBEIXZ) already defined in Application.obj
msvcprtd.lib(MSVCP71D.dll) : error LNK2005: "public: int __thiscall std::ios_base::width(void)const " (?width@ios_base@std@@QBEHXZ) already defined in Application.obj
msvcprtd.lib(MSVCP71D.dll) : error LNK2005: "public: class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > & __thiscall std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >::erase(unsigned int,unsigned int)" (?erase@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAEAAV12@II@Z) already defined in Application.obj
msvcprtd.lib(MSVCP71D.dll) : error LNK2005: "public: __thiscall std::locale::~locale(void)" (??1locale@std@@QAE@XZ) already defined in Application.obj
msvcprtd.lib(MSVCP71D.dll) : error LNK2005: "public: class std::locale __thiscall std::ios_base::getloc(void)const " (?getloc@ios_base@std@@QBE?AVlocale@2@XZ) already defined in Application.obj
msvcprtd.lib(MSVCP71D.dll) : error LNK2005: "public: void __thiscall std::basic_streambuf<char,struct std::char_traits<char> >::_Unlock(void)" (?_Unlock@?$basic_streambuf@DU?$char_traits@D@std@@@std@@QAEXXZ) already defined in Application.obj
msvcprtd.lib(MSVCP71D.dll) : error LNK2005: "public: void __thiscall std::basic_streambuf<char,struct std::char_traits<char> >::_Lock(void)" (?_Lock@?$basic_streambuf@DU?$char_traits@D@std@@@std@@QAEXXZ) already defined in Application.obj
msvcprtd.lib(MSVCP71D.dll) : error LNK2005: "public: __thiscall std::_Lockit::~_Lockit(void)" (??1_Lockit@std@@QAE@XZ) already defined in Application.obj
msvcprtd.lib(MSVCP71D.dll) : error LNK2005: "public: void __thiscall std::locale::facet::_Register(void)" (?_Register@facet@locale@std@@QAEXXZ) already defined in libcpd.lib(locale0.obj)
msvcprtd.lib(MSVCP71D.dll) : error LNK2005: "public: void __thiscall std::locale::facet::_Incref(void)" (?_Incref@facet@locale@std@@QAEXXZ) already defined in Application.obj
msvcprtd.lib(MSVCP71D.dll) : error LNK2005: "public: static unsigned int __cdecl std::ctype<char>::_Getcat(class std::locale::facet const * *)" (?_Getcat@?$ctype@D@std@@SAIPAPBVfacet@locale@2@@Z) already defined in Application.obj
msvcprtd.lib(MSVCP71D.dll) : error LNK2005: "public: class std::locale::facet const * __thiscall std::locale::_Getfacet(unsigned int)const " (?_Getfacet@locale@std@@QBEPBVfacet@12@I@Z) already defined in libcpd.lib(locale0.obj)
msvcprtd.lib(MSVCP71D.dll) : error LNK2005: "public: __thiscall std::locale::id::operator unsigned int(void)" (??Bid@locale@std@@QAEIXZ) already defined in Application.obj
msvcprtd.lib(MSVCP71D.dll) : error LNK2005: "public: __thiscall std::_Lockit::_Lockit(int)" (??0_Lockit@std@@QAE@H@Z) already defined in Application.obj
msvcprtd.lib(MSVCP71D.dll) : error LNK2005: "public: char __thiscall std::basic_ios<char,struct std::char_traits<char> >::widen(char)const " (?widen@?$basic_ios@DU?$char_traits@D@std@@@std@@QBEDD@Z) already defined in Application.obj
msvcprtd.lib(MSVCP71D.dll) : error LNK2005: "public: unsigned int __thiscall std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >::size(void)const " (?size@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QBEIXZ) already defined in Application.obj
msvcprtd.lib(MSVCP71D.dll) : error LNK2005: "public: static int __cdecl std::char_traits<char>::to_int_type(char const &)" (?to_int_type@?$char_traits@D@std@@SAHABD@Z) already defined in Application.obj
msvcprtd.lib(MSVCP71D.dll) : error LNK2005: "public: int __thiscall std::basic_streambuf<char,struct std::char_traits<char> >::sputc(char)" (?sputc@?$basic_streambuf@DU?$char_traits@D@std@@@std@@QAEHD@Z) already defined in Application.obj
msvcprtd.lib(MSVCP71D.dll) : error LNK2005: "public: char __thiscall std::basic_ios<char,struct std::char_traits<char> >::fill(void)const " (?fill@?$basic_ios@DU?$char_traits@D@std@@@std@@QBEDXZ) already defined in Application.obj
msvcprtd.lib(MSVCP71D.dll) : error LNK2005: "public: int __thiscall std::ios_base::flags(void)const " (?flags@ios_base@std@@QBEHXZ) already defined in Application.obj
msvcprtd.lib(MSVCP71D.dll) : error LNK2005: "public: class std::basic_ostream<char,struct std::char_traits<char> > & __thiscall std::basic_ostream<char,struct std::char_traits<char> >::flush(void)" (?flush@?$basic_ostream@DU?$char_traits@D@std@@@std@@QAEAAV12@XZ) already defined in Application.obj
msvcprtd.lib(MSVCP71D.dll) : error LNK2005: "public: class std::basic_ostream<char,struct std::char_traits<char> > * __thiscall std::basic_ios<char,struct std::char_traits<char> >::tie(void)const " (?tie@?$basic_ios@DU?$char_traits@D@std@@@std@@QBEPAV?$basic_ostream@DU?$char_traits@D@std@@@2@XZ) already defined in Application.obj
msvcprtd.lib(MSVCP71D.dll) : error LNK2005: "public: bool __thiscall std::ios_base::good(void)const " (?good@ios_base@std@@QBE_NXZ) already defined in Application.obj
msvcprtd.lib(MSVCP71D.dll) : error LNK2005: "public: void __thiscall std::basic_ostream<char,struct std::char_traits<char> >::_Osfx(void)" (?_Osfx@?$basic_ostream@DU?$char_traits@D@std@@@std@@QAEXXZ) already defined in Application.obj
msvcprtd.lib(MSVCP71D.dll) : error LNK2005: "bool __cdecl std::uncaught_exception(void)" (?uncaught_exception@std@@YA_NXZ) already defined in libcpd.lib(uncaught.obj)
msvcprtd.lib(MSVCP71D.dll) : error LNK2005: "public: char const * __thiscall std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >::c_str(void)const " (?c_str@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QBEPBDXZ) already defined in Main.obj
MSVCRTD.lib(MSVCR71D.dll) : error LNK2005: "public: __thiscall bad_cast::bad_cast(char const *)" (??0bad_cast@@QAE@PBD@Z) already defined in LIBCD.lib(stdexcpt.obj)
MSVCRTD.lib(MSVCR71D.dll) : error LNK2005: "public: virtual __thiscall exception::~exception(void)" (??1exception@@UAE@XZ) already defined in LIBCD.lib(stdexcpt.obj)
MSVCRTD.lib(MSVCR71D.dll) : error LNK2005: "public: __thiscall exception::exception(void)" (??0exception@@QAE@XZ) already defined in LIBCD.lib(stdexcpt.obj)
MSVCRTD.lib(MSVCR71D.dll) : error LNK2005: "public: __thiscall exception::exception(class exception const &)" (??0exception@@QAE@ABV0@@Z) already defined in LIBCD.lib(stdexcpt.obj)
MSVCRTD.lib(ti_inst.obj) : error LNK2005: "private: __thiscall type_info::type_info(class type_info const &)" (??0type_info@@AAE@ABV0@@Z) already defined in LIBCD.lib(typinfo.obj)
MSVCRTD.lib(ti_inst.obj) : error LNK2005: "private: class type_info & __thiscall type_info::operator=(class type_info const &)" (??4type_info@@AAEAAV0@ABV0@@Z) already defined in LIBCD.lib(typinfo.obj)
LINK : warning LNK4098: defaultlib 'MSVCRTD' conflicts with use of other libs; use /NODEFAULTLIB:library
Debug/FYProject.exe : fatal error LNK1169: one or more multiply defined symbols found

SOLVED.

needed to configure project to run as multithreaded dll.

sorry to bother you.


[EDIT] however although it builds fine now, the compiler still spits out this:
LINK : warning LNK4098: defaultlib 'MSVCRTD' conflicts with use of other libs; use /NODEFAULTLIB:library

is this bad? what does it mean?

Ignore that warning, there are few cases it is actually bad..

cool, thanks!

For note, it just means you are mixing library types (debug with release, single-threaded with multi-threaded), so you may experience issues depending on what you do, but many cases it does not matter and you have no choice in the matter anyway (like bringing in another library).

EDIT: Here, a half second search found that, has a table of which things conflict with which libraries so you can fix it if you feel so inclined, and are able to (aka, not importing another conflicting library).