Logging library for Qt

[artem.marchenko]

I am quite new to Qt and I am looking for a logging library.

Something that would have several priorities to be enabled, disabled (errors, warnings, infos), could print to console or file and ideally have a set of macros that would automagically add classname and method name to the log file.

I tried googling around, managed to find mentions of Log4Qt and QxtLogger, but somehow not much activity around them and surprising amount of messages on just using qInstallMsgHandler() and creating a custom logger just for yourself.

What would be a supported logging library to study closer?
Or is everybody really creating his own logger and that's it?

[AcerExtensa]

Why do you need any logging libraries? Qt has great and simple logging possibilities...

Using qDebug(), qWarning() & qCritical() with implemented MsgHandler function can do everything what you need and it's done in 5 minutes...

[andre]

QxtLogger works just fine. There is also work going on in Qt itself to make more detailed logging possible, but that will be for Qt5.

[Scylla]

Or take a look at "this":http://developer.qt.nokia.com/forums/viewthread/2654 .

[xstream]

Hi. Writing qInstallMsgHandler() yourself is pointless. There's a ready-made library that already implements all the necessary cases: https://github.com/yamixst/qtlogger
Just include qtlogger.h, call gQtLogger.configure(), and you've got super-advanced logging :)

[SGaist]

@xstream Hi,

Thanks for sharing ! It looks pretty interesting.
I think there might be one thing missing from it: QLoggingCategory support.

[xstream]

@SGaist Just try it. The category is fully supported. there is both filtering and printing of categories.

[SGaist]

My bad ! I somehow missed your use of QLoggingCategory although I looked for it.