qt编译出现的异常（一）

最近在编写程序时，我使用了第三方插件qwt，正常安装之后，在编译项目时出现了下列情况：./debug\curvewidgetclass.o: In function `CurveWidgetClass':E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:5: undefined reference to `_imp___ZN7QwtPlotC2EP7QWidget'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:8: undefined reference to `_imp___ZN7QwtPlot6canvasEv'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:8: undefined reference to `_imp___ZN13QwtPlotPannerC1EP13QwtPlotCanvas'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:11: undefined reference to `_imp___ZN7QwtPlot6canvasEv'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:11: undefined reference to `_imp___ZN16QwtPlotMagnifierC1EP13QwtPlotCanvas'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:17: undefined reference to `_imp___ZN7QwtPlot8setTitleERK7QString'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:18: undefined reference to `_imp___ZN9QwtLegendC1EP7QWidget'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:18: undefined reference to `_imp___ZN7QwtPlot12insertLegendEP9QwtLegendNS_14LegendPositionEd'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:21: undefined reference to `_imp___ZN7QwtPlot12setAxisTitleEiRK7QString'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:22: undefined reference to `_imp___ZN7QwtPlot12setAxisScaleEiddd'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:24: undefined reference to `_imp___ZN7QwtPlot12setAxisTitleEiRK7QString'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:25: undefined reference to `_imp___ZN7QwtPlot12setAxisScaleEiddd'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:28: undefined reference to `_imp___ZN7QwtPlot6canvasEv'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:29: undefined reference to `_imp___ZN7QwtPlot6canvasEv'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:30: undefined reference to `_imp___ZN7QwtPlot6canvasEv'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:30: undefined reference to `_imp___ZN13QwtPlotCanvas15setBorderRadiusEd'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:34: undefined reference to `_imp___ZN7QwtPlot6canvasEv'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:36: undefined reference to `_imp___ZN11QwtPlotGridC1Ev'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:37: undefined reference to `_imp___ZN11QwtPlotGrid10enableXMinEb'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:38: undefined reference to `_imp___ZN11QwtPlotGrid9setMajPenERK4QPen'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:39: undefined reference to `_imp___ZN11QwtPlotGrid9setMinPenERK4QPen'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:40: undefined reference to `_imp___ZN11QwtPlotItem6attachEP7QwtPlot'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:45: undefined reference to `_imp___ZN12QwtPlotCurveC1ERK7QString'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:46: undefined reference to `_imp___ZN11QwtPlotItem13setRenderHintENS_10RenderHintEb'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:47: undefined reference to `_imp___ZN12QwtPlotCurve18setLegendAttributeENS_15LegendAttributeEb'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:48: undefined reference to `_imp___ZN11QwtPlotItem6attachEP7QwtPlot'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:53: undefined reference to `_imp___ZN13QwtPlotMarkerC1Ev'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:54: undefined reference to `_imp___ZN7QwtTextC1ERK7QStringNS_10TextFormatE'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:54: undefined reference to `_imp___ZN13QwtPlotMarker8setLabelERK7QwtText'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:54: undefined reference to `_imp___ZN7QwtTextD1Ev'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:55: undefined reference to `_imp___ZN13QwtPlotMarker17setLabelAlignmentE6QFlagsIN2Qt13AlignmentFlagEE'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:56: undefined reference to `_imp___ZN13QwtPlotMarker12setLineStyleENS_9LineStyleE'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:57: undefined reference to `_imp___ZN13QwtPlotMarker9setYValueEd'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:58: undefined reference to `_imp___ZN11QwtPlotItem6attachEP7QwtPlot'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:61: undefined reference to `_imp___ZN13QwtPlotMarkerC1Ev'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:62: undefined reference to `_imp___ZN7QwtTextC1ERK7QStringNS_10TextFormatE'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:62: undefined reference to `_imp___ZN13QwtPlotMarker8setLabelERK7QwtText'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:62: undefined reference to `_imp___ZN7QwtTextD1Ev'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:63: undefined reference to `_imp___ZN13QwtPlotMarker17setLabelAlignmentE6QFlagsIN2Qt13AlignmentFlagEE'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:64: undefined reference to `_imp___ZN13QwtPlotMarker19setLabelOrientationEN2Qt11OrientationE'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:65: undefined reference to `_imp___ZN13QwtPlotMarker12setLineStyleENS_9LineStyleE'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:66: undefined reference to `_imp___ZN13QwtPlotMarker10setLinePenERK4QPen'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:67: undefined reference to `_imp___ZN13QwtPlotMarker9setXValueEd'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:68: undefined reference to `_imp___ZN11QwtPlotItem6attachEP7QwtPlot'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:54: undefined reference to `_imp___ZN7QwtTextD1Ev'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:62: undefined reference to `_imp___ZN7QwtTextD1Ev'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:5: undefined reference to `_imp___ZN7QwtPlotD2Ev'./debug\curvewidgetclass.o: In function `ZN16CurveWidgetClass8populateEP7QVectorIdES0_I7QStringEi':E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:85: undefined reference to `_imp___ZN12QwtPlotCurve6setPenERK4QPen'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:86: undefined reference to `_imp___ZN11QwtPlotItem8setTitleERK7QString'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:89: undefined reference to `_imp___ZN12QwtPlotCurve6setPenERK4QPen'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:90: undefined reference to `_imp___ZN11QwtPlotItem8setTitleERK7QString'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:93: undefined reference to `_imp___ZN12QwtPlotCurve6setPenERK4QPen'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:94: undefined reference to `_imp___ZN11QwtPlotItem8setTitleERK7QString'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:97: undefined reference to `_imp___ZN12QwtPlotCurve6setPenERK4QPen'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:98: undefined reference to `_imp___ZN11QwtPlotItem8setTitleERK7QString'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:101: undefined reference to `_imp___ZN12QwtPlotCurve6setPenERK4QPen'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:102: undefined reference to `_imp___ZN11QwtPlotItem8setTitleERK7QString'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:105: undefined reference to `_imp___ZN12QwtPlotCurve6setPenERK4QPen'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:106: undefined reference to `_imp___ZN11QwtPlotItem8setTitleERK7QString'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:109: undefined reference to `_imp___ZN12QwtPlotCurve6setPenERK4QPen'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:110: undefined reference to `_imp___ZN11QwtPlotItem8setTitleERK7QString'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:113: undefined reference to `_imp___ZN12QwtPlotCurve6setPenERK4QPen'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:114: undefined reference to `_imp___ZN11QwtPlotItem8setTitleERK7QString'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:133: undefined reference to `_imp___ZN12QwtPlotCurve10setSamplesERK7QVectorIdES3_'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:135: undefined reference to `_imp___ZN7QwtPlot16setAxisScaleDrawEiP12QwtScaleDraw'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:136: undefined reference to `_imp___ZN7QwtPlot20setAxisLabelRotationEid'./debug\curvewidgetclass.o: In function `ZN16CurveWidgetClass11resizeEventEP12QResizeEvent':E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.cpp:167: undefined reference to `_imp___ZN7QwtPlot11resizeEventEP12QResizeEvent'./debug\curvewidgetclass.o: In function `TimeScaleDraw':E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.h:28: undefined reference to `_imp___ZN12QwtScaleDrawC2Ev'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.h:30: undefined reference to `_imp___ZN20QwtAbstractScaleDraw13setTickLengthEN11QwtScaleDiv8TickTypeEd'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.h:31: undefined reference to `_imp___ZN20QwtAbstractScaleDraw13setTickLengthEN11QwtScaleDiv8TickTypeEd'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.h:32: undefined reference to `_imp___ZN20QwtAbstractScaleDraw13setTickLengthEN11QwtScaleDiv8TickTypeEd'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.h:34: undefined reference to `_imp___ZN20QwtAbstractScaleDraw10setSpacingEd'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.h:28: undefined reference to `_imp___ZN12QwtScaleDrawD2Ev'./debug\curvewidgetclass.o: In function `ZNK13TimeScaleDraw5labelEd':E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.h:39: undefined reference to `_imp___ZN7QwtTextC1ERK7QStringNS_10TextFormatE'./debug\curvewidgetclass.o:curvewidgetclass.cpp:(.rdata$_ZTV13TimeScaleDraw[vtable for TimeScaleDraw]+0x10): undefined referenceto `QwtAbstractScaleDraw::draw(QPainter*, QPalette const&) const'./debug\curvewidgetclass.o:curvewidgetclass.cpp:(.rdata$_ZTV13TimeScaleDraw[vtable for TimeScaleDraw]+0x18): undefined referenceto `QwtScaleDraw::extent(QFont const&) const'./debug\curvewidgetclass.o:curvewidgetclass.cpp:(.rdata$_ZTV13TimeScaleDraw[vtable for TimeScaleDraw]+0x1c): undefined referenceto `QwtScaleDraw::drawTick(QPainter*, double, double) const'./debug\curvewidgetclass.o:curvewidgetclass.cpp:(.rdata$_ZTV13TimeScaleDraw[vtable for TimeScaleDraw]+0x20): undefined referenceto `QwtScaleDraw::drawBackbone(QPainter*) const'./debug\curvewidgetclass.o:curvewidgetclass.cpp:(.rdata$_ZTV13TimeScaleDraw[vtable for TimeScaleDraw]+0x24): undefined referenceto `QwtScaleDraw::drawLabel(QPainter*, double) const'./debug\curvewidgetclass.o: In function `~TimeScaleDraw':E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.h:25: undefined reference to `_imp___ZN12QwtScaleDrawD2Ev'E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/curvewidgetclass.h:25: undefined reference to `_imp___ZN12QwtScaleDrawD2Ev'./debug\moc_curvewidgetclass.o: In function `ZN16CurveWidgetClass11qt_metacastEPKc':E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/debug/moc_curvewidgetclass.cpp:71: undefined reference to `_imp___ZN7QwtPlot11qt_metacastEPKc'./debug\moc_curvewidgetclass.o: In function `ZN16CurveWidgetClass11qt_metacallEN11QMetaObject4CallEiPPv':E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/debug/moc_curvewidgetclass.cpp:76: undefined reference to `_imp___ZN7QwtPlot11qt_metacallEN11QMetaObject4CallEiPPv'./debug\moc_curvewidgetclass.o: In function `_static_initialization_and_destruction_0':E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/debug/moc_curvewidgetclass.cpp:55: undefined reference to `_imp___ZN7QwtPlot16staticMetaObjectE'./debug\moc_curvewidgetclass.o:moc_curvewidgetclass.cpp:(.rdata$_ZTV16CurveWidgetClass[vtable for CurveWidgetClass]+0x1c): undefinedreference to `QwtPlot::event(QEvent*)'./debug\moc_curvewidgetclass.o:moc_curvewidgetclass.cpp:(.rdata$_ZTV16CurveWidgetClass[vtable for CurveWidgetClass]+0x40): undefinedreference to `QwtPlot::sizeHint() const'./debug\moc_curvewidgetclass.o:moc_curvewidgetclass.cpp:(.rdata$_ZTV16CurveWidgetClass[vtable for CurveWidgetClass]+0x44): undefinedreference to `QwtPlot::minimumSizeHint() const'./debug\moc_curvewidgetclass.o:moc_curvewidgetclass.cpp:(.rdata$_ZTV16CurveWidgetClass[vtable for CurveWidgetClass]+0xe8): undefinedreference to `QwtPlot::canvasMap(int) const'./debug\moc_curvewidgetclass.o:moc_curvewidgetclass.cpp:(.rdata$_ZTV16CurveWidgetClass[vtable for CurveWidgetClass]+0xec): undefinedreference to `QwtPlot::updateLayout()'./debug\moc_curvewidgetclass.o:moc_curvewidgetclass.cpp:(.rdata$_ZTV16CurveWidgetClass[vtable for CurveWidgetClass]+0xf0): undefinedreference to `QwtPlot::drawCanvas(QPainter*)'./debug\moc_curvewidgetclass.o:moc_curvewidgetclass.cpp:(.rdata$_ZTV16CurveWidgetClass[vtable for CurveWidgetClass]+0xf4): undefinedreference to `QwtPlot::drawItems(QPainter*, QRectF const&, QwtScaleMap const*) const'./debug\moc_curvewidgetclass.o:moc_curvewidgetclass.cpp:(.rdata$_ZTV16CurveWidgetClass[vtable for CurveWidgetClass]+0xf8): undefinedreference to `QwtPlot::replot()'./debug\moc_curvewidgetclass.o:moc_curvewidgetclass.cpp:(.rdata$_ZTV16CurveWidgetClass[vtable for CurveWidgetClass]+0xfc): undefinedreference to `QwtPlot::legendItemClicked()'./debug\moc_curvewidgetclass.o:moc_curvewidgetclass.cpp:(.rdata$_ZTV16CurveWidgetClass[vtable for CurveWidgetClass]+0x100): undefinedreference to `QwtPlot::legendItemChecked(bool)'./debug\moc_curvewidgetclass.o:moc_curvewidgetclass.cpp:(.rdata$_ZTV16CurveWidgetClass[vtable for CurveWidgetClass]+0x104): undefinedreference to `QwtPlot::updateTabOrder()'./debug\moc_curvewidgetclass.o: In function `~CurveWidgetClass':E:\RemoteMonitorPromoteV4.0\RemoteMonitorPromoteV42/debug//../curvewidgetclass.h:45: undefined reference to `_imp___ZN7QwtPlotD2Ev'collect2: ld returned 1 exit statusmingw32-make[1]: *** [debug\RemoteMonitorPromoteV42.exe] Error 1mingw32-make: *** [debug] Error 209:30:04: 进程"D:\Qt\MinGW\bin\mingw32-make.exe"退出，退出代码 2 。Error while building/deploying project RemoteMonitorPromoteV41 (target: 桌面)When executing step 'Make'让人百思不解，明明安装正确，为什么还出现找不到文件没有定义的情况？最后我在项目文件中找到了问题，

注意其中的" "的地方，因为我在其他项目中直接粘贴过来，而那个项目文件用的编码为系统默认编码，现在项目编码为UTF-8编码，一粘贴，我就悲剧了，IDE竟然把 " 转化为了中文版 “ ！而不是英文，系统当然找不到库文件了！正确的是：

DEFINES    += QT_DLL QWT_DLL

CONFIG(debug,debug|release):LIBS += -L"D:/Qt/qwt/lib" -lqwtd

else:LIBS += -L"D:/Qt/qwt/lib" -lqwt

INCLUDEPATH+= D:/Qt/qwt/include