LNK2005 error in VS2005 when statically building Qt App

[pkloc]

Hello,

I am building my app in Visual Studio 2005 and wish to link to static version of the CRT. To do this I go to my project properties and in Configuration Properties->c/c++->Code Generation I set Runtime Library = /MTd (Multi-threaded Debug). This gives me the following errors:

Linking...
9>MSVCRT.lib(MSVCR80.dll) : error LNK2005: _isupper already defined in LIBCMTD.lib(_ctype.obj)
9>MSVCRT.lib(ti_inst.obj) : error LNK2005: "private: __thiscall type_info::type_info(class type_info const &)" (??0type_info@@AAE@ABV0@@Z) already defined in LIBCMTD.lib(typinfo.obj)
9>MSVCRT.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 LIBCMTD.lib(typinfo.obj)
9> Creating library nrcs_imp.lib and object nrcs_imp.exp
9>LINK : warning LNK4098: defaultlib 'MSVCRT' conflicts with use of other libs; use /NODEFAULTLIB:library
9>LIBCMTD.lib(crt0init.obj) : warning LNK4098: defaultlib 'msvcrtd.lib' conflicts with use of other libs; use /NODEFAULTLIB:library
9>E:\projects\Assign\pkloc_AssignQT\edm_news\assign_ qt\qt\source\main\Debug\Assign.exe : fatal error LNK1169: one or more multiply defined symbols found


When linking to dynamic version of CRT, by setting Runtime Library = /MDd (Multi-threaded Debug DLL) I get no errors.

How can I fix this?

[jpn]

Try following the instructions in our wiki: Building static applications (http://wiki.qtcentre.org/index.php?title=Building_static_applications).

[pkloc]

Are you saying it is necessary to build Qt itself statically in order to build a static application using Qt?

[jpn]

Are you saying it is necessary to build Qt itself statically in order to build a static application using Qt?
Yes. Otherwise you'll get a conflict between C runtime libs. While your application links to static runtime (LIBCMTD.lib) Qt still links to dynamic runtime (MSVCRT.lib). That's what the error message above is trying to tell.

[pkloc]

I built the static version of Qt, then I cleaned and re-built my project and now I get the following linker errors:

Linking...
1> Creating library E:\projects\Assign\pkloc_AssignQT\edm_news\assign_ qt\qt\source\main\Debug\common.lib and object E:\projects\Assign\pkloc_AssignQT\edm_news\assign_ qt\qt\source\main\Debug\common.exp
1>AvidStyle.obj : error LNK2001: unresolved external symbol "public: static struct QMetaObject const QHeaderView::staticMetaObject" (?staticMetaObject@QHeaderView@@2UQMetaObject@@B)
1>AvidStyle.obj : error LNK2001: unresolved external symbol "public: static struct QMetaObject const QMenuBar::staticMetaObject" (?staticMetaObject@QMenuBar@@2UQMetaObject@@B)
1>AvidStyle.obj : error LNK2001: unresolved external symbol "public: static struct QMetaObject const QScrollArea::staticMetaObject" (?staticMetaObject@QScrollArea@@2UQMetaObject@@B)
1>moc_AlternateScrollArea.obj : error LNK2001: unresolved external symbol "public: static struct QMetaObject const QScrollArea::staticMetaObject" (?staticMetaObject@QScrollArea@@2UQMetaObject@@B)

[pkloc]

OK, so I changed a setting for all the libraries I'm building: I changed Configuration Type from Dynamic Library to Static Library. That took care of the errors in the previous posting. Now, unfortunately, when my main project starts to link I get the following:

A bunch of wnarnings like:

1>NRCSModel.lib(CacheModel.obj) : warning LNK4049: locally defined symbol ?convertToQString@JavaQTBridgeHelper@javahelper@av id@@SA?AVQString@@VString@lang@java@@@Z (public: static class QString __cdecl avid::javahelper::JavaQTBridgeHelper::convertToQSt ring(class java::lang::String)) imported
1>NRCSModel.lib(EntityShell.obj) : warning LNK4049: locally defined symbol ?convertToQString@JavaQTBridgeHelper@javahelper@av id@@SA?AVQString@@VString@lang@java@@@Z (public: static class QString __cdecl avid::javahelper::JavaQTBridgeHelper::convertToQSt ring(class java::lang::String)) imported
1>EventDatesModel.obj : warning LNK4049: locally defined symbol ??0UIException@ui@avid@@QAE@ABVQString@@@Z (public: __thiscall avid::ui::UIException::UIException(class QString const &)) imported

followed by a bunch of errors like:

1>ConditionDateCoverageEvent.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) protected: void __thiscall avid::javahelper::Loggable::logCodeLine(class QString const &)const " (__imp_?logCodeLine@Loggable@javahelper@avid@@IBEX ABVQString@@@Z)
1>ConditionDateCoverageLocation.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) protected: void __thiscall avid::javahelper::Loggable::logCodeLine(class QString const &)const " (__imp_?logCodeLine@Loggable@javahelper@avid@@IBEX ABVQString@@@Z)

Ouch!!!

[jpn]

Please correct me if I'm wrong but I don't think you need imports/exports with static libraries.

[pkloc]

That's true, thank you.

Ultimately I am trying to link to the static version of the CRT but I guess that is not supported by Qt according to this:

http://trolltech.com/developer/knowledgebase/faq.2007-03-15.4154694947/

[jpn]

Hey, thanks for pointing it out! I just wish they were more specific about the memory problems. I have added a notice to our wiki about the issue.