I have a problem accessing a 3rd party library (SMS) in QT Creator.
I'm on Windows 10, 64 bit
Qt Creator 4.2.1 - Based on Qt 5.8.0 (MSVC 2015, 32 bit)
Using Visual Studio 2015 (Community and Enterprise) with update 3

In Visual Studio, I was able to correct the problem using Windows Environment Variables and by setting Character Set to Unicode. But I would really prefer to use Qt Creator for an IDE.

In Qt Creator, the simplest code referring to SMS produces the build error below. There are no *d.dll or *d.lib files (no debugging versions) but that does not seem to prevent debugging my own code in Visual Studio. I have tried release-mode building in Qt Creator, but that did not help. I have even tried modifying the *.pro file with an absolute path - no go.

Can anyone tell me how to buildling with these 3rd party libraries?
Thanks!

Build error:
Qt Code: 
  1. link /NOLOGO /DYNAMICBASE /NXCOMPAT /INCREMENTAL:NO /SUBSYSTEM:WINDOWS "/MANIFESTDEPENDENCY:type='win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' publicKeyToken='6595b64144ccf1df' language='*' processorArchitecture='*'" /MANIFEST:embed /OUT:release\legereModeler.exe @C:\Users\ROBIN_~1\AppData\Local\Temp\legereModeler.exe.4552.1922.jom
  2. surfacesmoother.obj : error LNK2019: unresolved external symbol "void __cdecl iwos_WriteBuffer(char const *,char const *,char const *)" (?iwos_WriteBuffer@@YAXPEBD00@Z) referenced in function "public: virtual void __cdecl IwTArray<class IwVector3d>::Dump(void)const " (?Dump@?$IwTArray@VIwVector3d@@@@UEBAXXZ)
  3. surfacesmoother.obj : error LNK2001: unresolved external symbol "public: virtual void __cdecl IwObject::Dump(char *)const " (?Dump@IwObject@@UEBAXPEAD@Z)
  4. release\legereModeler.exe : fatal error LNK1120: 2 unresolved externals
  5. jom: E:\sandbox\build-legereModeler-Desktop_Qt_5_8_0_MSVC2015_64bit-Release\Makefile.Release [release\legereModeler.exe] Error 1120
  6. jom: E:\sandbox\build-legereModeler-Desktop_Qt_5_8_0_MSVC2015_64bit-Release\Makefile [release] Error 2
  7. 14:58:30: The process "C:\Qt\Qt5.8.0\Tools\QtCreator\bin\jom.exe" exited with code 2.
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My *.pro file:
Qt Code: 
  1. QT       += core gui
  2.  
  3. greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
  4.  
  5. TARGET = legereModeler
  6. TEMPLATE = app
  7. DEFINES += QT_DEPRECATED_WARNINGS
  8. #DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
  9.  
  10. SOURCES += main.cpp\
  11.     control/surfacesmoother.cpp \
  12.     display/mainwindow.cpp \
  13.     handlers/mainwindowhandlers.cpp \
  14.     model/fakedata.cpp \
  15.     utils/coordinatesmanager.cpp
  16.  
  17. HEADERS += control/surfacesmoother.h \
  18.     display/mainwindow.h \
  19.     handlers/mainwindowhandlers.h \
  20.     model/fakedata.h \
  21.     utils/coordinatesmanager.h \
  22.     GeneratedFiles/ui_mainwindow.h
  23.  
  24. FORMS    += mainwindow.ui
  25.  
  26. LIBS += -L$$PWD/../SMS/ -lNLib
  27. #LIBS += -LC:\sandbox\SMS -lNLib
  28. #LIBS += -L$$PWD/../SMS/ -lNLibd
  29.  
  30. LIBS += -L$$PWD/../SMS/ -lNMTLib
  31. #LIBS += -LC:\sandbox\SMS -lNMTLib
  32. #LIBS += -L$$PWD/../SMS/ -lNMTLibd
  33.  
  34. INCLUDEPATH += $$PWD/../SMS
  35. DEPENDPATH += $$PWD/../SMS
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