I disable the qDebug() messages by writing
CONFIG(release, debug|release):DEFINES += QT_NO_DEBUG_OUTPUT
in the .pro file. This works fine. I would like to know if there is any way to enable qDebug() messages using the source code. I would like to send it as an argument to the application. Therefore by default I will have the qDebug() messages disabled, but with an argument stating to switch on the qDebug() messages I need the qDebug() enabled. Is it possible to do this?
Any help is appreciated
You can control QDebug (and all messages) at runtime via a few options:
QT_LOGGING_RULES="*.debug=false;driver.usb.debug=true"
turns on qDebug for everything except USB debug. If you need a more complicated setup, or if you are using Qt 5.5 or earlier you can turn on and off individual debug messages via a qtlogging.ini file.You can add your own function for handling Qt debug messages with qInstallMsgHandler
This will allow you to control whether to print the messages.
Adding this code to my qmake project file enabled qDebug() messages for release builds on Windows/MSYS, even without the qInstallMsgHandler():
CONFIG += console
CONFIG += warn_on
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