QT installation failed on arm71

FRKhan

@SGaist Thank you very much. I cross compiled qt-4.8.7 with gcc-linaro-arm-linux-gnueabihf-4.8-2013.10_linux cross compiler. I created .img file of the installed folder and mounted on root of my target device. then i created a simple application on my host system for the target device with same cross compiler and qmake. I checked my executable as follow

file <myexe>
<myexe>: ELF 32-bit LSB executable, ARM, EABI5 version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 3.1.1, BuildID[sha1]=67324567f3bc1d67e9bc876e670ed6e8fcd3a061, not stripped

The image file on which qt is installed is mounted on /mnt/

Now when i try to execute my executable file, something appears but vanishes instantly with following error on terminal ( I tried ./myexe and ./myexe -qws but got same error message)

Fontconfig warning:ignoring C.UTF-8: not a valid language tag
./myexe: symbol lookup error: ./myexe: undefined symbol: _ZN7QWidget8qwsEventEP8QWSEvent

I'm feeling that i'm missing some path setting but i have no clue about that. I have searched this error but nothing resolved it.

SGaist

Run ldd on your executable. You will likely see the distribution provided Qt rather than the one you cross-compiled.

FRKhan

@SGaist here is the output og ldd <myexe>

libQtGui.so.4 => /usr/local/Qt-4.8.7-arm/lib/libQtGui.so.4 (0xb682d000)
	libQtNetwork.so.4 => /usr/local/Qt-4.8.7-arm/lib/libQtNetwork.so.4 (0xb6773000)
	libQtCore.so.4 => /usr/local/Qt-4.8.7-arm/lib/libQtCore.so.4 (0xb64ea000)
	libpthread.so.0 => /lib/arm-linux-gnueabihf/libpthread.so.0 (0xb64b2000)
	libstdc++.so.6 => /usr/lib/arm-linux-gnueabihf/libstdc++.so.6 (0xb6407000)
	libm.so.6 => /lib/arm-linux-gnueabihf/libm.so.6 (0xb639b000)
	libgcc_s.so.1 => /lib/arm-linux-gnueabihf/libgcc_s.so.1 (0xb6379000)
	libc.so.6 => /lib/arm-linux-gnueabihf/libc.so.6 (0xb6292000)
	libdl.so.2 => /lib/arm-linux-gnueabihf/libdl.so.2 (0xb6287000)
	librt.so.1 => /lib/arm-linux-gnueabihf/librt.so.1 (0xb6279000)
	/lib/ld-linux-armhf.so.3 (0x7f5d1000)

besides this, I have tried a few approaches. I used my cross-compiler and root file system running on SD card.
https://medium.com/@amirmann/how-to-cross-compile-qt-for-raspberry-pi-3-on-linux-ubuntu-for-beginners-75acf2a078c
this removed the undefined symbol error but gives this error when i ran my exe on target board

./myexe
QWSSocket::connectToLocalFile could not connect:: No such file or directory
QWSSocket::connectToLocalFile could not connect:: No such file or directory
QWSSocket::connectToLocalFile could not connect:: No such file or directory
QWSSocket::connectToLocalFile could not connect:: No such file or directory
QWSSocket::connectToLocalFile could not connect:: No such file or directory
QWSSocket::connectToLocalFile could not connect:: No such file or directory
No Qt for Embedded Linux server appears to be running.

If you want to run this program as a server,
add the "-qws" command-line option.

./myexe -qws
Qt for Embedded Linux data directory is not owned by user 0: /tmpqtembedded-0 aborted

here is some other information of my target system that can be relevant

apt-cache policy libqt4-declarative
  Installed: 4:4.8.5-dfsg-5ubuntu2
  Candidate: 4:4.8.5-dfsg-5ubuntu2


ran on target
strings /usr/lib/arm-linux-gnueabihf/libQtDeclarative.so.4 | egrep 'qwsEvent|x11Event'
_ZN7QWidget8**x11**EventEP7_XEvent

athar@athar-HP-Z420-Workstation:/usr/local/Qt-4.8.7-arm/lib$ strings libQtDeclarative.so.4 | egrep 'qwsEvent|x11Event'
_ZN7QWidget8**qws**EventEP8QWSEvent

file myexe
myexe: ELF 32-bit LSB executable, ARM, EABI5 version 1 (SYSV), dynamically linked, interpreter /lib/ld-, for GNU/Linux 3.1.1, BuildID[sha1]=e473e432126aa63423a95cbfcce7dec29632255a, not stripped

root@athar-HP-Z420-Workstation:/usr/local# egrep -r qwsEvent Qt-4.8.7-arm/*
Binary file Qt-4.8.7-arm/demos/composition/composition matches
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Binary file Qt-4.8.7-arm/examples/multimedia/videowidget/videowidget matches
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Binary file Qt-4.8.7-arm/examples/uitools/multipleinheritance/multipleinheritance matches
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Binary file Qt-4.8.7-arm/examples/desktop/screenshot/screenshot matches
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Binary file Qt-4.8.7-arm/examples/draganddrop/fridgemagnets/fridgemagnets matches
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Binary file Qt-4.8.7-arm/examples/effects/fademessage/fademessage matches
Binary file Qt-4.8.7-arm/examples/tools/treemodelcompleter/treemodelcompleter matches
Binary file Qt-4.8.7-arm/examples/tools/inputpanel/inputpanel matches
Binary file Qt-4.8.7-arm/examples/tools/echoplugin/echoplugin matches
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Binary file Qt-4.8.7-arm/examples/tools/i18n/i18n matches
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Binary file Qt-4.8.7-arm/examples/tools/settingseditor/settingseditor matches
Binary file Qt-4.8.7-arm/examples/tools/customcompleter/customcompleter matches
Binary file Qt-4.8.7-arm/examples/tools/plugandpaint/plugandpaint matches
Binary file Qt-4.8.7-arm/examples/tools/styleplugin/styleplugin matches
Binary file Qt-4.8.7-arm/examples/tools/regexp/regexp matches
Binary file Qt-4.8.7-arm/examples/declarative/positioners/positioners matches
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Binary file Qt-4.8.7-arm/examples/declarative/ui-components/main/main matches
Binary file Qt-4.8.7-arm/examples/declarative/ui-components/searchbox/searchbox matches
Binary file Qt-4.8.7-arm/examples/declarative/ui-components/flipable/flipable matches
Binary file Qt-4.8.7-arm/examples/declarative/ui-components/scrollbar/scrollbar matches
Binary file Qt-4.8.7-arm/examples/declarative/ui-components/tabwidget/tabwidget matches
Binary file Qt-4.8.7-arm/examples/declarative/ui-components/slideswitch/slideswitch matches
Binary file Qt-4.8.7-arm/examples/declarative/ui-components/progressbar/progressbar matches
Binary file Qt-4.8.7-arm/examples/declarative/touchinteraction/pincharea/pincharea matches
Binary file Qt-4.8.7-arm/examples/declarative/touchinteraction/mousearea/mousearea-example/mouseareaexample matches
Binary file Qt-4.8.7-arm/examples/declarative/touchinteraction/gestures/experimental-gestures/experimentalgestures matches
Binary file Qt-4.8.7-arm/examples/declarative/sqllocalstorage/sqllocalstorage matches
Binary file Qt-4.8.7-arm/examples/declarative/animation/basics/property-animation/property-animation matches
Binary file Qt-4.8.7-arm/examples/declarative/animation/basics/color-animation/color-animation matches
Binary file Qt-4.8.7-arm/examples/declarative/animation/behaviors/behavior-example/behavior-example matches
Binary file Qt-4.8.7-arm/examples/declarative/animation/states/states matches
Binary file Qt-4.8.7-arm/examples/declarative/animation/easing/easing matches
Binary file Qt-4.8.7-arm/examples/declarative/i18n/i18n matches
Binary file Qt-4.8.7-arm/examples/declarative/modelviews/webview/newwindows/newwindows matches
Binary file Qt-4.8.7-arm/examples/declarative/modelviews/webview/inlinehtml/inlinehtml matches
Binary file Qt-4.8.7-arm/examples/declarative/modelviews/webview/alerts/alerts matches
Binary file Qt-4.8.7-arm/examples/declarative/modelviews/webview/autosize/autosize matches
Binary file Qt-4.8.7-arm/examples/declarative/modelviews/webview/googlemaps/googlemaps matches
Binary file Qt-4.8.7-arm/examples/declarative/modelviews/parallax/parallax matches
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Binary file Qt-4.8.7-arm/examples/declarative/toys/dynamicscene/dynamicscene matches
Binary file Qt-4.8.7-arm/examples/declarative/toys/tic-tac-toe/tic-tac-toe matches
Binary file Qt-4.8.7-arm/examples/declarative/toys/clocks/clocks matches
Binary file Qt-4.8.7-arm/examples/declarative/toys/corkboards/corkboards matches
Binary file Qt-4.8.7-arm/examples/declarative/toys/tvtennis/tvtennis matches
Binary file Qt-4.8.7-arm/examples/declarative/text/fonts/hello/hello matches
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Binary file Qt-4.8.7-arm/examples/declarative/text/fonts/banner/banner matches
Binary file Qt-4.8.7-arm/examples/declarative/text/fonts/availableFonts/availableFonts matches
Binary file Qt-4.8.7-arm/examples/declarative/text/textselection/textselection matches
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Binary file Qt-4.8.7-arm/examples/network/fortuneclient/fortuneclient matches
Binary file Qt-4.8.7-arm/examples/network/fortuneserver/fortuneserver matches
Binary file Qt-4.8.7-arm/examples/network/broadcastreceiver/broadcastreceiver matches
Binary file Qt-4.8.7-arm/examples/network/loopback/loopback matches
Binary file Qt-4.8.7-arm/examples/network/http/http matches
Binary file Qt-4.8.7-arm/examples/network/blockingfortuneclient/blockingfortuneclient matches
Binary file Qt-4.8.7-arm/examples/qtconcurrent/imagescaling/imagescaling matches
Binary file Qt-4.8.7-arm/examples/gestures/imagegestures/imagegestures matches
Binary file Qt-4.8.7-arm/examples/dialogs/tabdialog/tabdialog matches
Binary file Qt-4.8.7-arm/examples/dialogs/standarddialogs/standarddialogs matches
Binary file Qt-4.8.7-arm/examples/dialogs/extension/extension matches
Binary file Qt-4.8.7-arm/examples/dialogs/configdialog/configdialog matches
Binary file Qt-4.8.7-arm/examples/dialogs/classwizard/classwizard matches
Binary file Qt-4.8.7-arm/examples/dialogs/findfiles/findfiles matches
Binary file Qt-4.8.7-arm/examples/dialogs/licensewizard/licensewizard matches
Qt-4.8.7-arm/include/Qt/qwidget.h:    virtual bool qwsEvent(QWSEvent *);
Qt-4.8.7-arm/include/Qt/qapplication.h:    virtual bool qwsEventFilter(QWSEvent *);
Qt-4.8.7-arm/include/Qt/qgraphicswidget.h:    //virtual bool qwsEvent(QWSEvent *event);
Qt-4.8.7-arm/include/QtGui/qwidget.h:    virtual bool qwsEvent(QWSEvent *);
Qt-4.8.7-arm/include/QtGui/qapplication.h:    virtual bool qwsEventFilter(QWSEvent *);
Qt-4.8.7-arm/include/QtGui/qgraphicswidget.h:    //virtual bool qwsEvent(QWSEvent *event);
Binary file Qt-4.8.7-arm/lib/libQtSvg.so.4.8.7 matches
Binary file Qt-4.8.7-arm/lib/libQtGui.so.4.8.7 matches
Binary file Qt-4.8.7-arm/lib/libQtWebKit.so.4.9.4 matches
Binary file Qt-4.8.7-arm/lib/libQtScriptTools.so.4.8.7 matches
Binary file Qt-4.8.7-arm/lib/libQtDeclarative.so.4.8.7 matches
Binary file Qt-4.8.7-arm/lib/libQt3Support.so.4.8.7 matches
Binary file Qt-4.8.7-arm/tests/qt4/tst_hybridPixmap/hybridPixmap matches
root@athar-HP-Z420-Workstation:/usr/local# egrep -r x11Event Qt-4.8.7-arm/*
Qt-4.8.7-arm/include/Qt/qwidget.h:    virtual bool x11Event(XEvent *);
Qt-4.8.7-arm/include/Qt/qapplication.h:    virtual bool x11EventFilter(XEvent *);
Qt-4.8.7-arm/include/Qt/qgraphicswidget.h:    //virtual bool x11Event(XEvent *event);
Qt-4.8.7-arm/include/Qt/qx11embed_x11.h:    bool x11Event(XEvent *);
Qt-4.8.7-arm/include/Qt/qx11embed_x11.h:    bool x11Event(XEvent *);
Qt-4.8.7-arm/include/QtGui/qwidget.h:    virtual bool x11Event(XEvent *);
Qt-4.8.7-arm/include/QtGui/qapplication.h:    virtual bool x11EventFilter(XEvent *);
Qt-4.8.7-arm/include/QtGui/qgraphicswidget.h:    //virtual bool x11Event(XEvent *event);
Qt-4.8.7-arm/include/QtGui/qx11embed_x11.h:    bool x11Event(XEvent *);
Qt-4.8.7-arm/include/QtGui/qx11embed_x11.h:    bool x11Event(XEvent *);

Last two command resulted the same while executed on target board.

SGaist

Did you run ldd on your target ?
In any case, did you install your cross-compiler Qt on your target ?

FRKhan

@SGaist

@SGaist said in QT installation failed on arm71:

Did you run ldd on your target ?

Yes. here is the output

analog@analog:~$ ldd NewProj
libQtGui.so.4 => /usr/local/Qt-4.8.7-arm/lib/libQtGui.so.4 (0xb682d000)
libQtNetwork.so.4 => /usr/local/Qt-4.8.7-arm/lib/libQtNetwork.so.4 (0xb6773000)
libQtCore.so.4 => /usr/local/Qt-4.8.7-arm/lib/libQtCore.so.4 (0xb64ea000)
libpthread.so.0 => /lib/arm-linux-gnueabihf/libpthread.so.0 (0xb64b2000)
libstdc++.so.6 => /usr/lib/arm-linux-gnueabihf/libstdc++.so.6 (0xb6407000)
libm.so.6 => /lib/arm-linux-gnueabihf/libm.so.6 (0xb639b000)
libgcc_s.so.1 => /lib/arm-linux-gnueabihf/libgcc_s.so.1 (0xb6379000)
libc.so.6 => /lib/arm-linux-gnueabihf/libc.so.6 (0xb6292000)
libdl.so.2 => /lib/arm-linux-gnueabihf/libdl.so.2 (0xb6287000)
librt.so.1 => /lib/arm-linux-gnueabihf/librt.so.1 (0xb6279000)
/lib/ld-linux-armhf.so.3 (0x7f5d1000)

@SGaist said in QT installation failed on arm71:

In any case, did you install your cross-compiler Qt on your target ?

I cross compiled Qt4.8.7 and installed in /usr/local/qt on my host PC. I then copied the /usr/local/qt folder in my target at /usr/local/qt-arm

Pablo J. Rogina

@FRKhan said in QT installation failed on arm71:

in my target at /usr/local/qt-arm

If there's no typo, something is not matching since ldd is showing Qt libraries are taken from another folder: /usr/local/Qt-4.8.7-arm/lib so it seems you have another installation of Qt in your device...

SGaist

One thing to do: copy the Qt installation folder in the exact same subdirectory on your target than on your desktop machine.

FRKhan

Thank you guys for your time.

@Pablo-J-Rogina said in QT installation failed on arm71:

If there's no typo, something is not matching since ldd is showing Qt libraries are taken from another folder: /usr/local/Qt-4.8.7-arm/lib so it seems you have another installation of Qt in your device...

yes that was typo. It is /usr/local/Qt-4.8.7-arm

@SGaist said in QT installation failed on arm71:

One thing to do: copy the Qt installation folder in the exact same subdirectory on your target than on your desktop machine.

I did it. deployed application but nothing appeared. not even any error. I found this thread. I open console terminal (CNTRL+ALT+F1) and my application executed successfully. I did not enabled virtual frame buffer or vnc while configuring qt sources.

Although i somehow executed application on my target but i didn't understand one thing. How qt application executes on host system when compiled using host kit? i mean why that doesn't depends upon virtual framebuffer on vnc?
Secondly, Qt virtual buffer documentation says we should not use it on release application but on debug applications only. If this is true the what is the most optimized approach to deploy the qt application on production release?

SGaist

If you are building with your host kit then it's going to use your host infrastructure. Likely the XCB backend.

The virtual framebuffer is a tool that allows you to visualise your application the way it would be on your target without the need to have it available.

FRKhan

@SGaist Thank you

@SGaist said in QT installation failed on arm71:

The virtual framebuffer is a tool that allows you to visualise your application the way it would be on your target without the need to have it available.

Ok. than what is the best way to deploy the application. My target board is running XUnuntu. When i deploy my application, it appears in destined folder when does not run until i go to console terminal. I have to do (CNTRL+ALT+F1) and run ./app -qws.

what i want is, when i double click on my application executable, it should launch. Like built-in calculator. When i click on calculator icon, it's window appears. is it possible for qt application?

SGaist

Do you have a window manager on your target ?

FRKhan

@SGaist
yes. My target is Picozed SDR board which is running Xubuntu with HDMI display. It has Xfce desktop environment. We can install other tools as well. It has most of the desktop environment available.

SGaist

Then why are you using a Qt version built for embedded without window manager ?

FRKhan

@SGaist I have not figured out what version is suitable for me. I'm beginner in QT. I had no idea about this window manager thing. Can you please guide me. Any useful material or link?

SGaist

Well, since you want to use your desktop environnement on your target. Just don't pass the embedded option when configuring Qt. You'll have a standard desktop Qt but built for ARM.