What's the right way to get "qmlscene" to work out of the box?

Dmitry Shachnev mitya57 at ubuntu.com
Mon Jun 23 14:33:02 UTC 2014


I have a patch for this but it was not accepted upstream:

https://codereview.qt-project.org/82702

Can you use absolute path to qmlscene? Or, better, to qml (which is a
successor to qmlscene)?

--
Dmitry Shachnev
Am 23.06.2014 18:23 schrieb "Sebastien Bacher" <seb128 at ubuntu.com>:

> Hey,
>
> Not sure if that has been discussed before, but current "qmlscene"
> doesn't work on our default installation.
>
> Just as an example; taking a trusty iso, enabling universe and
> installing ubuntu-ui-toolkit-examples leads to a non working gallery
> desktop entry ... the command is a qmlscene one, and running "qmlscene"
> returns an error about "/usr/lib/<...>/qt4/qmlscene" not existing. It's
> not because that binary is using qt5.
>
> That issue also leads to click packages to fail to run on the
> unity8-desktop iso, and I'm trying to see what's the right way to
> resolve it...
>
> I've discussed the topic a bit on IRC and the advices/replies include:
> - qmlscene is a dev tools and shouldn't be used by those applications
> - you should change the environment/export a variable to make qt5 the
> default (seems to be what ubuntu-touch does)
> - install qt5-default ... but that would bring some extra 50MB on the iso
>
> We could make unity8-desktop-session export the environment variable
> needed to have qt5 default, but that's a workaround and would mean those
> are still buggy.
>
> Is there any reason qtchooser doesn't check for available versions, and
> always prefer an installed one to the default if that one is not
> available? It feels like that would be the right way to handle the
> issue, but I might be overlooking something...
>
> One issue I can see, is that it would not resolve the case where qt4
> binaries are installed but the application is a qt5 ... maybe it's a bug
> in the packaging of those applications and they should reference the qt5
> binary rather than qtchooser un-versionned command?
>
> Opinions?
>
> Cheers,
> Sebastien Bacher
>
>
>
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