QChart undefined reference to _imp__ZN8QtCharts

[Milori]

Hi,
in mainwindow.h is:
#include <QtSerialPort/QSerialPort>
#include <QtCharts/QtCharts>
private:
Ui::MainWindow *ui;
QSerialPort *serial;
QChart *tempChart;

and in mainwindow.cpp is:
serial = new QSerialPort(this);
tempChart = new QChart();

Both new object *serial and *tempChart is brown highlighted and focused.
Object serial works normally and object tempChart has error "undefined reference to `_imp___ZN8QtCharts6QChartC1EP13QGraphicsItem6QFlagsIN2Qt10WindowTypeEE'
Where to look for a mistake

[mrjj]

@Milori said in QChart undefined reference to _imp__ZN8QtCharts:

QtCharts

Hi
Do you have
QT += charts
in the .pro file?

[Milori]

No :), thanks.
One Small question:
is any link to pdf where is decribed this and others requires to correctly building QT projects?

[mrjj]

@Milori
For all classes, its listed in docs.
http://doc.qt.io/qt-5/qtcharts-index.html
says so down the page.

Other example
http://doc.qt.io/qt-5/qserialport.html

[Milori]

I apologize but i don't find asked pdf file on links.
Where to study, for example, how different between import QT += serialport and QT +=core gui serialport is?

[jsulm]

@Milori Why do you need a PDF? The link posted by @mrjj points to official Qt documentation - there are no PDFs.
"QT += serialport" - only adds support for serialport to your app (makes the serial port Qt classes available)
"QT +=core gui serialport" - same as above but adds core and gui modules as well
You only need to add modules you need, as @mrjj said you find which modules a class belongs to in its documentation.
You should read this http://doc.qt.io/qt-5/qtmodules.html