[Interest] When does Qt load its plugins?

[Elvis Stansvik]

2016-07-13 12:34 GMT+02:00 Elvis Stansvik <elvstone at gmail.com>:
> I'm working on packaging an application using QtWidgets as an AppImage
> and I'm looking at which of the Qt plugins I must bundle.
>
> I'll run an strace while using the application, but I thought I'd also

I realize now that stracing my application, it's still hard to make
out what I actually need. For instance, Qt opens the Gtk platformtheme
plugin:

    open("/tmp/.mount_jBV3dp/usr/lib/qt5/plugins/platformthemes/libqgtk2.so",
O_RDONLY|O_CLOEXEC) = 9

But I know for sure that I don't need that one.

Is there anywhere where all of Qt's own plugins are listed with a
short description of their purpose/importance?

Elvis

> ask here: When in general does Qt load its plugins? For some plugins
> (such as the platform plugin), I expect it to be quite early. But what
> about imageformat plugins, is there a policy that they be loaded as
> late as possible?
>
> In short I'm wondering if I must use every nook and cranny of the
> application during my strace run, to catch all plugins, or if it's
> enough to say wait until the QApplication and QMainWindow is up.
>
> Thanks in advance,
> Elvis