Why i am gettting error: 'QtMsgHandler' does not name a type' ?

Qt embedded developer

when i include log4Qt library in qt and build project at that time i am getting below error

/home/log4qt/logmanager.h:267: error: 'QtMsgHandler' does not name a type
QtMsgHandler mOldQtMsgHandler;
^

Is there any solution is there for this error in qt 5.5.1 ?

jsulm

@Qt-embedded-developer What log4Qt version do you use? In master branch there is no such line in logmanager.h

Qt embedded developer

@jsulm

Thanks for reply.

i actually don't know version of it. i have downloaded this from sourceforge site.

can you refer me site for latest version of log4qt library download ?

jsulm

@Qt-embedded-developer https://github.com/MEONMedical/Log4Qt

Qt embedded developer

@jsulm Sorry for earlier i mentioned my qt version is 5.12.

Actually My qt version is 5.5.1. and so i get 2 error :

/home/src/log4qt/log4qt.h:463: error: #error "Log4Qt requires Qt version 5.12.0 or higher"

error "Log4Qt requires Qt version 5.12.0 or higher"

To resolve this error when i comment below part of code

#if QT_VERSION < QT_VERSION_CHECK(5, 12, 0)
#   error "Log4Qt requires Qt version 5.12.0 or higher"
#endif

i get another error

/home/mangal/WORK_SOFTRONICS/Project/24JULY21/LZ-50/trunk/Log4Qt/src/log4qt/logmanager.h:279: error: 'QVersionNumber' does not name a type
static QVersionNumber versionNumber();
^
QVersionNumber

What is solution for this issue ?

Christian Ehrlicher

@Qt-embedded-developer said in Why i am gettting error: 'QtMsgHandler' does not name a type' ?:

error "Log4Qt requires Qt version 5.12.0 or higher"
to resolve this error when i comment below part of code

And you really think the message is there for no reason??

jsulm

@Qt-embedded-developer Please take time to read the link I provided, you will find this there:
"Minimum Qt version required Qt5.12 (for support of Qt versions down to 5.3 use branch 1.4 or the lates 1.4.x release or for support of Qt versions down to 5.7 use branch 1.5 or the lates 1.5.x release)".
So, if you want to use your old Qt version then use Log4Qt version 1.4 (checkout branch 1.4).

Qt embedded developer

@Christian-Ehrlicher Sorry for trying that.

Qt embedded developer

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