Re: [gentoo-user] finding qt plugins?

[Paul Hartman <paul.hartman+gentoo@gmail.com>]

On Mon, Jun 29, 2009 at 12:04 AM, Roy Wright<roy@wright.org> wrote:
> Howdy,
>
> On ~x86 did the upgrade to qt 4.5.2 and get the following message:
>
> "After a rebuild or upgrade of Qt, it can happen that Qt plugins (such as Qt
> and KDE styles and widgets) can no longer be loaded. In this situation you
> should recompile the packages providing these plugins...
>
> "Packages that typically need to be recompiled are kdelibs from KDE4, any
> additional KDE4/Qt4 styles, qscintilla and PyQt4..."
>
> Then followed the link on the plugins which stated:
>
> "The Qt library and all plugins are built using a build key. The build key
> in the Qt library is examined against the build key in the plugin, and if
> they match, the plugin is loaded. If the build keys do not match, then the
> Qt library refuses to load the plugin."
>
> So how do I find all the installed qt plugins on my system and check their
> build keys?

From a couple minutes of poking around:

strings /usr/lib/qt4/libQtCore.so | grep Build.key

strings some-other-file | grep buildkey

Which comes back with seemingly everything build against Qt4... But I
don't know how to tell which ones qualify as a "plug-in"...

Typically when I rebuild Qt4 I also rebuild kdelibs, PyQt4, and my
themes... in my case that is gtk-engines-kde4, gtk-engines-qt, and all
qtcurve packages. Seems to work for me.