No console window in GUI app with CONFIG+=console

[A Former User]

My GUI app won't start with a console even if I add the line "CONFIG+=console" in the projetc file.

I tried to clean all files before recompile it but still no console.

Qt lib 4.8
Qt Creator 2.4
Compiler mingw32

Does somebody have an idea ?

[rschaub]

have you tried deleting the makefiles and/or re-running qmake?

[A Former User]

Yes, i tried to delete all generated files ( including makefiles ) and rebuild the project in a Qt command prompt

[A Former User]

Are you using "QApplication":http://doc-snapshot.qt-project.org/4.8/qapplication.html or "QCoreApplication":http://doc-snapshot.qt-project.org/4.8/qcoreapplication.html instance?

@The QApplication class manages the GUI application's control flow and main settings.@

@The QCoreApplication class provides an event loop for console Qt applications.@

[andre]

Should not matter, you can get a console with a QApplication too. Also note that QApplication inherits QCoreApplication.

[A Former User]

I'm using a QApplication instance. But i'm not sure if the problem is here 'cause this feature was made to provide a debug console in GUI app.

[Wilk]

Hello
AFAIK Qt Creator automatically gets debug output from the application and shows it at "Application Output" tab.

[A Former User]

A QApplication always initializes the graphics system. For a real console app, without using QtGui module, you need QCoreApplication.

There is no easy way to provide a "debug console" in your application. You will need to attach to the windows service for that or provide a logger window for qDebug/qWarning/qError yourself. For the latter, there is an example for a "Browser for QDebug Log Output":/wiki/Browser_for_QDebug_output in the wiki.

PS: There's another, more sophisticated logger framework. See the "announcement in the showcase forum":/forums/viewthread/2654.