[solved] *.obj files not found when using msvc

Mortl

Hi,
I am working on a project and I am trying to compile it with the Msvc 2010. It compiles perfectly when using the MinGw compiler, but due to compatibility reasons I have to use Msvc.
When I am building the program all files compile, and the *.obj files are existing.
But afterwards I get some errors like:

@PrimaryEmotion.obj:-1: Fehler: LNK2001: Nicht aufgelöstes externes Symbol ""public: __thiscall AffectiveState::AffectiveState(class AffectiveState const &)" (??0AffectiveState@@QAE@ABV0@@Z)".@

(unresolved symbols) and a hint, that (in this case noted above) the file PrimaryEmotion.obj was not found.
I read in some forums that this might be an error which comes from the linker.
I do not know if this is relevant, but the code compiles to a dll file.

Any suggestions what I am doing wrong?

Regards,
Jan

SGaist

Hi,

Are you trying to build a MinGW Qt project with Visual Studio ? If so, it won't work, you have to get a matching Qt installed

Mortl

No, the project is pure c++ without any dependencies. It was written with Qt-Creator but you should be able to compile all source files with any compiler.

SGaist

So are you using still using Qt Creator ? Did you setup the compiler and linker correctly ?

And are you sure you are linking to your library correctly ?

Mortl

Yes I am using Qt Creator with "Qt 5.2.0 MSVC2010 32bit OpenGL" and the "msvc 10 x86" compiler. I am pretty shure this is correct, because the compilation does not fail, but the linking.

A am not linking agains any library outside of the project. The linking errors come from *.obj files which are not found, but are compiled from within the project.

As I said the project compiles fine with MinGW so this might be a msvc issue. Any msvc specific stuff that I do not see in the documentation.

For clearance here the complete compiler output.

@01:16:22: Führe Schritte für Projekt WASABIEngine aus...
01:16:22: Starte "C:\Qt\Qt5.2.0\5.2.0\msvc2010_opengl\bin\qmake.exe" C:\Users\Mortl\Desktop\WASABIQtGui\WASABIEngine\WASABIEngine.pro -r -spec win32-msvc2010
01:16:23: Der Prozess "C:\Qt\Qt5.2.0\5.2.0\msvc2010_opengl\bin\qmake.exe" wurde normal beendet.
01:16:23: Starte "C:\Qt\Qt5.2.0\Tools\QtCreator\bin\jom.exe"
C:\Qt\Qt5.2.0\Tools\QtCreator\bin\jom.exe -f Makefile.Release
cl -c -nologo -Zm200 -Zc:wchar_t -O2 -MD -GR -W3 -w34100 -w34189 -EHsc -DUNICODE -DWIN32 -DWASABIENGINE_LIBRARY -DQT_NO_DEBUG -DQT_CORE_LIB -DNDEBUG -I"..........\Qt\Qt5.2.0\5.2.0\msvc2010_opengl\include" -I"..........\Qt\Qt5.2.0\5.2.0\msvc2010_opengl\include\QtCore" -I"release" -I"." -I"..........\Qt\Qt5.2.0\5.2.0\msvc2010_opengl\mkspecs\win32-msvc2010" -Forelease\ @C:\Users\Mortl\AppData\Local\Temp\WASABIRunner.obj.2992.15.jom
WASABIRunner.cc
WASABIEngine.cc
SecondaryEmotion.cc
PrimaryEmotion.cc
EmotionDynamics.cc
Code wird generiert...
cl -c -nologo -Zm200 -Zc:wchar_t -O2 -MD -GR -W3 -w34100 -w34189 -EHsc -DUNICODE -DWIN32 -DWASABIENGINE_LIBRARY -DQT_NO_DEBUG -DQT_CORE_LIB -DNDEBUG -I"..........\Qt\Qt5.2.0\5.2.0\msvc2010_opengl\include" -I"..........\Qt\Qt5.2.0\5.2.0\msvc2010_opengl\include\QtCore" -I"release" -I"." -I"..........\Qt\Qt5.2.0\5.2.0\msvc2010_opengl\mkspecs\win32-msvc2010" -Forelease\ @C:\Users\Mortl\AppData\Local\Temp\EmotionConverter.obj.2992.15.jom
EmotionConverter.cc
EmotionContainer.cc
cogaEmotionalAttendee.cc
cogaAttendee.cc
AffectiveState.cc
Code wird generiert...
link /NOLOGO /DYNAMICBASE /NXCOMPAT /INCREMENTAL:NO /DLL /MANIFEST /MANIFESTFILE:release\WASABIEngine.dll.embed.manifest /OUT:release\WASABIEngine.dll @C:\Users\Mortl\AppData\Local\Temp\WASABIEngine.dll.2992.7593.jom
Bibliothek "release\WASABIEngine.lib" und Objekt "release\WASABIEngine.exp" werden erstellt.
SecondaryEmotion.obj : error LNK2019: Verweis auf nicht aufgelöstes externes Symbol ""public: __thiscall AffectiveState::AffectiveState(class AffectiveState const &)" (??0AffectiveState@@QAE@ABV0@@Z)" in Funktion ""public: __thiscall SecondaryEmotion::SecondaryEmotion(class SecondaryEmotion const &)" (??0SecondaryEmotion@@QAE@ABV0@@Z)".
PrimaryEmotion.obj : error LNK2001: Nicht aufgelöstes externes Symbol ""public: __thiscall AffectiveState::AffectiveState(class AffectiveState const &)" (??0AffectiveState@@QAE@ABV0@@Z)".
EmotionContainer.obj : error LNK2001: Nicht aufgelöstes externes Symbol ""public: __thiscall AffectiveState::AffectiveState(class AffectiveState const &)" (??0AffectiveState@@QAE@ABV0@@Z)".
release\WASABIEngine.dll : fatal error LNK1120: 1 nicht aufgelöste externe Verweise.
jom: C:\Users\Mortl\Desktop\WASABIQtGui\build-WASABIEngine\Makefile.Release [release\WASABIEngine.dll] Error 1120
jom: C:\Users\Mortl\Desktop\WASABIQtGui\build-WASABIEngine\Makefile [release] Error 2
01:16:30: Der Prozess "C:\Qt\Qt5.2.0\Tools\QtCreator\bin\jom.exe" wurde mit dem Rückgabewert 2 beendet.
Fehler beim Erstellen/Deployment des Projekts WASABIEngine(Kit: Desktop Qt 5.2.0 MSVC2010 32bit OpenGL)
Bei der Ausführung von Schritt 'Make'
01:16:30: Verstrichene Zeit: 00:08.@

kenchan

Hi, Are you sure all your function call are spelled correctly?

AffectiveState::AffectiveState -> EffectiveState::EffectiveState ?? spelling mistakes or just outdated objects are often the cause of this kind of thing.

Try a clean all and a rebuild :-)

Mortl

As I said, the project compiles fine with an other compiler (MinGW) so the problem can not be a spelling mistake.
I always clean the project before building, somtimes by manually deleting the whole build directory.

Mortl

I have found the solution:

In the header file there is a copy constructor declared but in the source file not defined. MinGW does not care about that, but MSVC throws therse errors while linking.

SGaist

Indeed, gcc and msvc (also clang) have different sensitivities about such things (also e.g. order of initialization)

Great you found and and thanks for sharing !
Can you also update the thread title prepending [solved] ? So other forum users may know a solution has been found :)