Hi!

I am relatively a n00b in compiling under Windows. I followed the instruction to install Qwt-6.1.0-rc3, and apparently it worked. I am now trying to compile a project that makes use of QwtPlot, with the following (messy) .pro file:

Qt Code: 
  1. CONFIG += 	qwt\
  2. 			qt
  3. QT       += core\
  4. 			gui
  5.  
  6. greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
  7.  
  8. TARGET = VisualDiscretizerWin
  9. TEMPLATE = app
  10.  
  11. INCLUDEPATH += 	../../Dropbox/Utils/CPP/ \
  12. 				../../Dropbox/Utils/CPP/tinyxml/
  13.  
  14. SOURCES += main.cpp \
  15.     Interval.cpp \
  16.     VisualDiscretizerMainWindow.cpp \
  17.     VisualDiscretizerDiscretizationWindow.cpp \
  18.     ../../Dropbox/Utils/CPP/TextUtils.cpp \
  19.     ../../Dropbox/Utils/CPP/tinyxml/xmltest.cpp \
  20.     ../../Dropbox/Utils/CPP/tinyxml/tinyxmlparser.cpp \
  21.     ../../Dropbox/Utils/CPP/tinyxml/tinyxmlerror.cpp \
  22.     ../../Dropbox/Utils/CPP/tinyxml/tinyxml.cpp \
  23.     ../../Dropbox/Utils/CPP/tinyxml/tinystr.cpp
  24.  
  25. HEADERS  += \
  26.     Interval.h \
  27.     VisualDiscretizerMainWindow.h \
  28.     VisualDiscretizerDiscretizationWindow.h \
  29.     ../../Dropbox/Utils/CPP/TextUtils.hh \
  30.     ../../Dropbox/Utils/CPP/tinyxml/tinyxml.h \
  31.     ../../Dropbox/Utils/CPP/tinyxml/tinystr.h \
  32.     "C:/Qwt-6.1.0-rc3/include/qwt_plot.h"
  33.  
  34. FORMS    += \
  35.     VisualDiscretizer.ui
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I get some warnings during the compiling process (qmake <project-file>.pro / mingw32-make):
Qt Code: 
  1. E:\Research\VisualDiscretizerWin>qmake VisualDiscretizerWin.pro
  2.  
  3. E:\Research\VisualDiscretizerWin>mingw32-make
  4. mingw32-make -f Makefile.Release
  5. mingw32-make[1]: Entering directory 'E:/Research/VisualDiscretizerWin'
  6.  
  7. <snip>
  8.  
  9. release\moc_qwt_plot.cpp:95:6: warning: 'static void QwtPlot::qt_static_metacall
  10. (QObject*, QMetaObject::Call, int, void**)' redeclared without dllimport attribu
  11. te: previous dllimport ignored [-Wattributes]
  12. release\moc_qwt_plot.cpp:136:28: warning: 'QwtPlot::staticMetaObject' redeclared
  13.  without dllimport attribute after being referenced with dll linkage [enabled by
  14.  default]
  15. release\moc_qwt_plot.cpp:142:20: warning: 'virtual const QMetaObject* QwtPlot::m
  16. etaObject() const' redeclared without dllimport attribute: previous dllimport ig
  17. nored [-Wattributes]
  18. release\moc_qwt_plot.cpp:147:7: warning: 'virtual void* QwtPlot::qt_metacast(con
  19. st char*)' redeclared without dllimport attribute: previous dllimport ignored [-
  20. Wattributes]
  21. release\moc_qwt_plot.cpp:157:5: warning: 'virtual int QwtPlot::qt_metacall(QMeta
  22. Object::Call, int, void**)' redeclared without dllimport attribute: previous dll
  23. import ignored [-Wattributes]
  24. release\moc_qwt_plot.cpp:208:6: warning: 'void QwtPlot::itemAttached(QwtPlotItem
  25. *, bool)' redeclared without dllimport attribute after being referenced with dll
  26.  linkage [enabled by default]
  27. release\moc_qwt_plot.cpp:215:6: warning: 'void QwtPlot::legendDataChanged(const
  28. QVariant&, const QList<QwtLegendData>&)' redeclared without dllimport attribute
  29. after being referenced with dll linkage [enabled by default]
  30. g++ -Wl,-s -Wl,-subsystem,windows -mthreads -o release\VisualDiscretizerWin.exe
  31. object_script.VisualDiscretizerWin.Release  -lmingw32 -lqtmain -LE:\Libs\Qt\Qt5.
  32. 0.2\5.0.2\mingw47_32\lib -lQt5Widgets -lQt5Gui -lQt5Core -llibEGL -llibGLESv2 -l
  33. gdi32 -luser32 -LC:/Qwt-6.1.0-rc3/lib -lqwt
  34. mingw32-make[1]: Leaving directory 'E:/Research/VisualDiscretizerWin'
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And finally, when I try to run the executable VisualDiscretizerWin.exe in the release sub-folder, I get the dreaded error:

"VisualDiscretizerWin.exe - Entry Point Not Found
The procedure entry point __gxx_personality_sj0 could not be located in the dynamic link library libstdc++-6.dll"

Can you help me? Thanks in advance for your time