Plugin errors, & can't set path with qt.conf.

teux

Hi all,

I'm building a Qt 5.7.0 application for the raspberry pi running Raspbian 4.9.59-v7+ #1047.

As an integrated solution, I'm using QtRpi for the prebuilt Qt binaries and toolchain, and have it configured as a kit in Qt Creator.

Everything builds fine, but I'm running into issues with deploying the app, specifically with the eglfs plugin. Running with QT_DEBUG_PLUGINS enables, I get the following relevant output:

QFactoryLoader::QFactoryLoader() checking directory path "/home/pi/platforms" ...
loaded library "/usr/local/qt5pi/plugins/platforms/libqeglfs.so"
QLibraryPrivate::loadPlugin failed on "/usr/local/qt5pi/plugins/platforms/libqeglfs.so" : "Cannot load library /usr/local/qt5pi/plugins/platforms/libqeglfs.so: (libts-0.0.so.0: cannot open shared object file: No such file or directory)"
This application failed to start because it could not find or load the Qt platform plugin "eglfs"
in "".

Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, xcb.

Reinstalling the application may fix this problem.
Aborted

It's just confusing, as it seems all of the other plugins loaded just fine, ex:

QFactoryLoader::QFactoryLoader() looking at "/usr/local/qt5pi/plugins/platforms/libqlinuxfb.so"
Found metadata in lib /usr/local/qt5pi/plugins/platforms/libqlinuxfb.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "linuxfb"
        ]
    },
    "className": "QLinuxFbIntegrationPlugin",
    "debug": false,
    "version": 329472
}


Got keys from plugin meta data ("linuxfb")

My guess is that it's because of the empty search path in the error message: could not find or load the Qt platform plugin "eglfs" in "", but I can't seem to set that empty search path/folder. I've tried with a qt.conf in the application's directory, as per this documentation, but that doesn't seem to affect anything. Here's what I have:

[Paths]
Prefix = /usr/local/qt5pi/

Any thoughts/advice?
Thank you sincerely for the help.

And a quick edit, as it may be unclear, the file it's claiming it can't find does exist. See:

pi@beta:~$ find /usr/local/qt5pi/plugins/platforms/
/usr/local/qt5pi/plugins/platforms/
/usr/local/qt5pi/plugins/platforms/libqeglfs.so
/usr/local/qt5pi/plugins/platforms/libqminimal.so
/usr/local/qt5pi/plugins/platforms/libqminimalegl.so
/usr/local/qt5pi/plugins/platforms/libqxcb.so
/usr/local/qt5pi/plugins/platforms/libqoffscreen.so
/usr/local/qt5pi/plugins/platforms/libqlinuxfb.so

raven-worx

@teux said in Plugin errors, & can't set path with qt.conf.:

(libts-0.0.so.0: cannot open shared object file: No such file or directory)

you problem seems that the eglfs plugin doesn't load, because it can't find the dependency to libts?