"Undefined reference to `QwtPlot::QwtPlot(QWidget*)'

[mlte]

Hi, this is a linker error. Do you link against the qwt library?

Ginsengelf

I used the following commands to link the Qwt with Qtcreator.

ln -s /opt/qwt-6.1.0/plugins/designer/libqwt_designer_plugin.so /opt/Qt5.1.1/Tools/QtCreator/bin/plugins/designer/
echo /opt/qwt-6.1.0/lib | tee /etc/ld.so.conf.d/qwt.conf
ldconfig -v

ln -s /opt/qwt-6.1.0/plugins/designer/libqwt_designer_plugin.so /opt/Qt5.1.1/Tools/QtCreator/bin/plugins/designer/
echo /opt/qwt-6.1.0/lib | tee /etc/ld.so.conf.d/qwt.conf
ldconfig -v

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