Failed to build with Qt 6.5.3

[lengocthuong15]

Hi @sjinks
I am trying to build this lib with Qt 6.5.3
Everything looks good except there is an error the link state

qt_eventdispatcher_libev/libqt_eventdispatcher_libev.a(eventdispatcher_libev.cpp.o): In function `EventDispatcherLibEv::hasPendingEvents()':
eventdispatcher_libev.cpp:(.text+0x135): undefined reference to `qGlobalPostedEventsCount()'

For more context, I can build this with Qt 6.3.1 but got this issue when upgrading to Qt 6.5.3
Here is the output for qGlobalPostedEventsCount 6.3.1

And here is the output for qGlobalPostedEventsCount 6.5.3

It seems that in the new version, they change the use of qGlobalPostedEventsCount
Do you have any idea?

[lengocthuong15]

I've figured it out by myself, in Qt 6.5.3, they don't export the function qGlobalPostedEventsCount anymore, so when building with this lib, we cannot link it.
https://codereview.qt-project.org/c/qt/qtbase/+/411667/1

The workaround is to enable it again
Revert Q_CORE_EXPORT back to src/corelib/kernel/qcoreapplication.cpp
But I don't know is there any particular reason (especially about security) that they need to remove this export.
From my point of view, there is no solid reason, they just think that this function is not using anywhere other than autotest, so just the not export it to outside anymore.