ldd not finding libqgtk2 platform theme.

[azagaya]

Hi,
This may be related to #338.
I have an Ubuntu Trusty just for building Appimages, and i've installed Qt 5.12 there. However, when running linuxdeployqt, i have this:

ERROR: findDependencyInfo: "ldd: /opt/Qt/5.12.1/gcc_64/plugins/platformthemes/libqgtk2.so: No such file or directory\n"
ERROR: getBinaryRPaths: "objdump: '/opt/Qt/5.12.1/gcc_64/plugins/platformthemes/libqgtk2.so': No such file\n"
ERROR: file copy failed from "/opt/Qt/5.12.1/gcc_64/plugins/platformthemes/libqgtk2.so"
ERROR: to "/home/pablo/QtWorkspace/Appimages/NormalmapGenerator/usr/bin/..//plugins/platformthemes/libqgtk2.so"
ERROR: findDependencyInfo: "ldd: /opt/Qt/5.12.1/gcc_64/plugins/styles/libqgtk2style.so: No such file or directory\n"
ERROR: getBinaryRPaths: "objdump: '/opt/Qt/5.12.1/gcc_64/plugins/styles/libqgtk2style.so': No such file\n"
ERROR: file copy failed from "/opt/Qt/5.12.1/gcc_64/plugins/styles/libqgtk2style.so"
ERROR: to "/home/pablo/QtWorkspace/Appimages/NormalmapGenerator/usr/bin/..//plugins/styles/libqgtk2style.so"
ERROR: ldd outputLine: "libXrender.so.1 => not found"
ERROR: for binary: "/opt/Qt/5.12.1/gcc_64/plugins/platforms/libqxcb.so"
ERROR: Please ensure that all libraries can be found by ldd. Aborting.

How can i fix this? should i use older Qt??

[probonopd]

Thanks for reporting. Where is your Qt 5.12.1 coming from? Where is your libqgtk2style.so coming from?

[azagaya]

Hi,
I've installed everything with the online installer provided in Qt website. I think libqtgtk2style was not even installed that way.

[dxsooo]

Hi, I had the same problem when I use linuxdeployqt 6. I built my Qt 5.9.7 in docker and it won't build libqtgtk2style.so. When I checked my downloaded Qt(5.9.2) that works well with older linuxdeployqt 5, it doesn't have libqtgtk2style.so neither.

I suppose the newest linuxdeployqt searching wrong *.so?

[probonopd]

How exactly are you invoking linuxdeployqt @azagaya? Are you using some command line options?

[azagaya]

Hi,
I'm using -qmake and -appimage switches only.

[probonopd]

Does the file /opt/Qt/5.12.1/gcc_64/plugins/platformthemes/libqgtk2.so exist on your system? Or similar files?

[probonopd]

If it does not exist yet, what happens if you do

apt-get update
apt-get -y install libgtk2.0-dev
git clone http://code.qt.io/qt/qtstyleplugins.git
cd qtstyleplugins
qmake
make -j$(nproc)
sudo make install 
cd -

before invoking linuxdeployqt?

[azagaya]

No, only gtk3 versions seems to be installed with newer Qt.. . Funny thing is that I did not have this problem last year

[probonopd]

Please see whether this version resolves it:
https://transfer.sh/HrUX/linuxdeployqt-continuous-x86_64.AppImage

[azagaya]

Thanks! As soon as I get home after work I'll try!

[azagaya]

With that version i get this warning:

The plugin "/opt/Qt5.12.1/5.12.1/gcc_64/plugins/platformthemes/libqgtk2.so" could not be found. Please check spelling and try again!

However, Appimage generated works in my pc.
I have not tryied compiling qt styles myself yet, should i try that also? or this version should resolve it by itself?

[probonopd]

Thanks for testing. If you want it to look properly, you still should do

#350 (comment)

[b00f]

I also have the same issue. Any way to resolve it?

== UPDATE ==
#350 (comment) fixed it. Thanks

[b00f]

Unfortunately I was wrong. I got Segmentation fault error. At fist place I thought it's my mistake but looks like it was not. Please let me if you can find a workaround.

[probonopd]

Please try #355 (comment). The segfault may be unrelated to the gtk warnings.

[ibXCM]

git clone http://code.qt.io/qt/qtstyleplugins.git

Thanks bro，you solved my problem。

[bohning]

Unfortunately, compilation of the qtstyleplugins with gtk2.0 fails and I get (Qt 5.15.2):

qgtkstyle_p.cpp:511:11: error: ‘setSystemPalette’ is not a member of ‘QApplicationPrivate’
           QApplicationPrivate::setSystemPalette(newPalette);
           ^
Makefile:1915: recipe for target '.obj/qgtkstyle_p.o' failed

where this seems to be the solution: https://forums.freebsd.org/threads/qt5-style-plugins-patch-to-install-with-qt-5-15-0.76084/

So obviously, setSystemPalette() moved from QApplicationPrivate:: to QApplication:: namespace.

Any ideas?

[probonopd]

@bohning which system are you compiling this on? And using which Qt version from where?

[bohning]

@probonopd This was on Appveyor CI, Ubuntu 16.04, pre-installed Qt 5.15.2.

See the console output here.

Thanks for your response and taking the time.

[probonopd]

Are you using the 5.15.2 source code for qtstyleplugins?

[bohning]

Ah, now I see the problem. I simply followed your proposed solution and this is probably wrong. How would I get the 5.15.2 source code of the qtstyleplugins on AppVeyor?

[probonopd]

Err, looking at https://code.qt.io/cgit/qt/qtstyleplugins.git/ there seem to have been no changes in years, so that's probably not the issue. Sorry! Maybe it doesn't compile on 5.15.2 anymore? Can you try with e.g., Qt 5.9, just to be sure?

[bohning]

Yes, that’s where I just looked and came to the same conclusion. With Qt 5.9 it compiles just fine.

[probonopd]

Sounds like an issue with qtstyleplugins then? Maybe you'd like to open an issue at https://bugreports.qt.io/?