Error when compiling project with QT

Question

Hello, I’m a beginner in Qt, I took a C++ course with QT in 2013 but I couldn’t take the learning forward and now I’m resuming. Now I’m trying to compile a simple project, just create a new project in Qt widget, it automatically creates a main screen and I haven’t touched anything, I just tried running this program created by the IDE itself and the following error occurs:

Compiler generated alerts (contained in the image):

Warning: Overriding Recipe for target 'debug/main. o'

Warning: ignoring old Recipe for target 'debug/main. o'

Answer 1

Edson, this image you linked shows 2 warnings, warning that you are overwriting build targets.

In this case you have specifically set the name of your project’s main window to "main", which is the exact name of the file generated by Qt Creator to initialize the program in C++ (main.cpp), so you prevent the project from starting at the Qt default.

I recommend you change the name of the main window to anything other than "main", for example Mainwindow (Qt Creator default suggestion).

I hope I’ve helped.