Unsolved Failed to load Qmainwindow,qtwidgets,qtimezone,qfile after upgraded from jessie t stretch

[qt_ankit_developer]

Dear sir,
when i am using qt creator 4 on raspbian jessie everything is working fine, but when i have upgraded from jessie to stretch of raspbian, now my qtcretor version is also upgraded from qt4.8 to qt5.11.now when i am running my code on qtcreator it does not include Qtwidgets, Qmainwindow, Qtimezone and many more file in qt creator, compiler gives error that no such file found .
please help me to solve this problem

[SGaist]

Hi,

Do you mean, the default Qt version installed is now Qt 5.11 ?
If so, you have to add ˋQT+= widgetsˋ to your .pro file.

With Qt 5, the widgets have moved to their own module.

[qt_ankit_developer]

I have added that file also but still qmainwindow, qwidgets , qtimezone and many more files are not including on my project which is previously developed in qt creator 3.2.1

[SGaist]

Didn re-run qmake after that adding that line ?