Hi Kai,

I can say only about the QtSerialPort. 

The QtSerialPort module is used the libudev ((more precisely - the libudev 
devel is required !!!) as preferred way (for the QSerialPortInfo class) to 
detect a names and other info about present serial ports.

The support of libudev will detected in run-time by using the link_pkgconfig. 
In case libudev is disabled (or not found) then will be used a parsing in 
sysfs. But support of sysfs isn't up to the end implemented yet, therefore some 
devices (serial ports) may not be found.

Best regards,
Denis

21.10.2013, 18:30, "Koehne Kai" <[email protected]>:
> Hi there,
>
> In the latest Linux binary packages for 5.2 libQt5Webkit depends on 
> libudev.so.0, which isn't installed (or at least not in this version) on a 
> lot of distributions:
>
> https://bugreports.qt-project.org/browse/QTBUG-34176
>
> The easiest fix would be to configure Qt with -no-libudev / remove libudev 
> headers etc from the build machines. Anyhow, it seems also other Qt modules 
> use it if it's available, namely Qt5SerialPort, libqgtk2, 
> libqevdevtableplugin, libqevdevtouchplugin.so, libqevdevkeyboardplugin.so, 
> libqevdevmouseplugin.so, libqevdevtabletplugin.so .
>
> Can anyone in the knowing clarify how important libudev is for them? What 
> will break if we don't link against libudev anywhere (like we did with 5.1.1)?
>
> Regards
>
> Kai
>
> --
>    Kai Köhne, Senior Software Engineer - Digia, Qt
>    Digia Germany GmbH, Rudower Chaussee 13, D-12489 Berlin
>    Geschäftsführer: Mika Pälsi, Juha Varelius, Anja Wasenius
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