On Thu, Oct 24, 2013 at 2:15 PM, Koehne Kai <kai.koe...@digia.com> wrote:
> First time I post to the list, so please bear with me :) I'm a developer 
> working on Qt. The Qt project just released a  beta of the upcoming version 
> 5.2, and to help people to test it we've been also releasing an installer 
> with binaries for Linux that is supposed to work on a variety of 
> distributions.
>
> One of the problems [1] we still have to fix is our libudev.so.0 dependency 
> ... That is, we're building the packages on Ubuntu 11.10 and link against 
> system libudev.so.0 , while some modern distributions are (solely) providing 
> libudev.so.1. For some parts of Qt the libudev dependency is actually not 
> that important , and we can disable it. However, for the QtSerialPort library 
> I've been told libudev is crucial: It uses it to enumerate all available 
> ports.
>
> So, to overcome this we've been thinking about building & shipping our own 
> copy of libudev (renamed , or statically linked, to avoid clashes) ... Would 
> you expect such a pristine version of libudev, compiled on distribution A , 
> to work flawlessly on distribution B? What problems would you anticipate?

No, you cannot really ship your own libudev, it is coupled with the
daemon. They speak a non-trivial wire protocol and write udev database
files which are a private implementation only; they changed in the
past, and might change at any time again. Libudev and udevd can only
be used in the same version.

Kay
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