qDebug not displaying anything

c++ qt qt-creator qdebug
Lukasz Czerwinski picture Lukasz Czerwinski · Oct 9, 2012 · Viewed 18.2k times · Source

Often when I need to debug something it's easier to print something using qDebug() instead of debugging step-by-step using a debugger. The problem is that from time to time the output of qDebug() isn't displayed at all! The same with qWarning and qCritical. What's strange, it only occurs when running the project normally (Ctrl+R), while when debugging (F5) the output shows up.

Answer

Lukasz Czerwinski picture Lukasz Czerwinski · Oct 9, 2012

The solution is simple: add CONFIG += console to your .pro file and rebuild the whole project.

Related questions

Adding external library into Qt Creator project

How can I add external library into a project built by Qt Creator RC1 (version 0.9.2)? For example, the win32 function EnumProcesses() requires Psapi.lib to be added in the project to build.

Read More
QtCreator: No valid kits found

Installed just the IDE on Windows 7. I want to create a Plain C++ Project (Non-QT Project); however I get an error: No valid kits found. When I click on Options->Kits, I see the Desktop (default) kit, and it …

Read More
How to link opencv in QtCreator and use Qt library

This question must be duplicate many times, but it just doesn't work and sometimes it still remains unanswered. Sources of information are mainly these http://www.laganiere.name/opencvCookbook/chap1s1_2.shtml http://www.youtube.com/watch?v=dgcXYQijV6c …

Read More