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Build error. Unresolved external symbol
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This is what is output of the error
moc_widget.obj:-1: error: LNK2019: unresolved external symbol "private: void __cdecl Widget::setValue(int)" (?setValue@Widget@@AEAAXH@Z) referenced in function "private: static void __cdecl Widget::qt_static_metacall(class QObject *,enum QMetaObject::Call,int,void * *)" (?qt_static_metacall@Widget@@CAXPEAVQObject@@W4Call@QMetaObject@@HPEAPEAX@Z)I am trying to implement some custom slots and signals for my gui.
This is how my header looks like
QT_BEGIN_NAMESPACE namespace Ui { class Widget; } QT_END_NAMESPACE class Widget : public QWidget { Q_OBJECT public: Widget(QWidget *parent = nullptr); ~Widget(); private slots: void on_pushButton_clicked(); void setValue(int value); signals: void valueChanged(int newValue); private: Ui::Widget *ui; void init_gui(); int normalize(int iterations, int curriternum); int m_value; }; #endif // WIDGET_HIf i remove setValue from private slot it is building properly but if i include that its not build ing.
My pro file
QT += core gui greaterThan(QT_MAJOR_VERSION, 4): QT += widgets #ONFIG += c++11 # You can make your code fail to compile if it uses deprecated APIs. # In order to do so, uncomment the following line. #DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000 # disables all the APIs deprecated before Qt 6.0.0 INCLUDEPATH += ..\dependencies\eigen\include\eigen3\Eigen LIBS += -lwsock32 LIBS += -lws2_32 LIBS += -lkernel32 -lkernel32 -lgdi32 -lwinspool -lcomdlg32 -ladvapi32 -lshell32 -lole32 -loleaut32 -luuid -lodbc32 -lodbccp32 SOURCES += \ main.cpp \ widget.cpp HEADERS += \ widget.h FORMS += \ widget.ui # Default rules for deployment. qnx: target.path = /tmp/$${TARGET}/bin else: unix:!android: target.path = /opt/$${TARGET}/bin !isEmpty(target.path): INSTALLS += targetAs per some posts in stack and qt forum few suggested to run qmake and i did that. When building the error still remains?
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This is what is output of the error
moc_widget.obj:-1: error: LNK2019: unresolved external symbol "private: void __cdecl Widget::setValue(int)" (?setValue@Widget@@AEAAXH@Z) referenced in function "private: static void __cdecl Widget::qt_static_metacall(class QObject *,enum QMetaObject::Call,int,void * *)" (?qt_static_metacall@Widget@@CAXPEAVQObject@@W4Call@QMetaObject@@HPEAPEAX@Z)I am trying to implement some custom slots and signals for my gui.
This is how my header looks like
QT_BEGIN_NAMESPACE namespace Ui { class Widget; } QT_END_NAMESPACE class Widget : public QWidget { Q_OBJECT public: Widget(QWidget *parent = nullptr); ~Widget(); private slots: void on_pushButton_clicked(); void setValue(int value); signals: void valueChanged(int newValue); private: Ui::Widget *ui; void init_gui(); int normalize(int iterations, int curriternum); int m_value; }; #endif // WIDGET_HIf i remove setValue from private slot it is building properly but if i include that its not build ing.
My pro file
QT += core gui greaterThan(QT_MAJOR_VERSION, 4): QT += widgets #ONFIG += c++11 # You can make your code fail to compile if it uses deprecated APIs. # In order to do so, uncomment the following line. #DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000 # disables all the APIs deprecated before Qt 6.0.0 INCLUDEPATH += ..\dependencies\eigen\include\eigen3\Eigen LIBS += -lwsock32 LIBS += -lws2_32 LIBS += -lkernel32 -lkernel32 -lgdi32 -lwinspool -lcomdlg32 -ladvapi32 -lshell32 -lole32 -loleaut32 -luuid -lodbc32 -lodbccp32 SOURCES += \ main.cpp \ widget.cpp HEADERS += \ widget.h FORMS += \ widget.ui # Default rules for deployment. qnx: target.path = /tmp/$${TARGET}/bin else: unix:!android: target.path = /opt/$${TARGET}/bin !isEmpty(target.path): INSTALLS += targetAs per some posts in stack and qt forum few suggested to run qmake and i did that. When building the error still remains?
