Can't find libQt5Core lib

SGaist

And why are you not deploying the Qt5Core library since you already deploy the others ?

r3d9u11

@SGaist as I told before I did copy Qt libs with application to the target embedded device (as you can see the folder /ta512 already contains all needed Qt libs and executable application), also I did set value of LD_LIBRARY_PATH to /ta512 before application has been started.

SGaist

That's clear, but from your last test, why only these three libs and not QtCore ?

r3d9u11

@SGaist sorry, maybe I don't understand you question right. Does libQt5Core.so.5 (which was already deployed with application to the target device) is not "Qt5Core library"?

SGaist

The question is: since you are deploying 3 Qt libraries already, why not the Qt5Core ?

r3d9u11

@SGaist Sorry, but what do you mean under "Qt5Core"? "libQt5Core.so" is a "Qt5Core", isn't it?

SGaist

Yes it is.

r3d9u11

@SGaist because the target application is looking for the libQt5Core.so.5, not for libQt5Core.so

howewer I'll try to do copy of all aliases: libQt5Core.so, libQt5Core.so.5 and libQt5Core.so.5.12.0

thanks for hint!
and happy New Year ;)

SGaist

If you want to be sure the loader finds the correct library where you put them, then yes, copy all the aliases up to the library itself.

r3d9u11

@SGaist I did copy for each needed alias, but nothing changes:

# export LD_LIBRARY_PATH=/ta_20190102115904/qt5lib
# ls $LD_LIBRARY_PATH
libQt5Core.so         libQt5Gui.so         libQt5Widgets.so
libQt5Core.so.5       libQt5Gui.so.5       libQt5Widgets.so.5
libQt5Core.so.5.12.0  libQt5Gui.so.5.12.0  libQt5Widgets.so.5.12.0
# cd /ta_20190102115904
# ./qt_c
./qt_c: /usr/lib/arm-linux-gnueabihf/libQt5Core.so.5: version `Qt_5' not found (required by ./qt_c)

Ok, I did remove system version:

# mv /usr/lib/arm-linux-gnueabihf/libQt5Core.so.5 /usr/lib/arm-linux-gnueabihf/libQt5Core.so.5.orig
# mv /usr/lib/arm-linux-gnueabihf/libQt5Core.so.5.5 /usr/lib/arm-linux-gnueabihf/libQt5Core.so.5.5.orig
# mv /usr/lib/arm-linux-gnueabihf/libQt5Core.so.5.5.1 /usr/lib/arm-linux-gnueabihf/libQt5Core.so.5.5.1.orig
# ./qt_c
./qt_c: error while loading shared libraries: libQt5Core.so.5: cannot open shared object file: No such file or directory

(there is no alias /usr/lib/arm-linux-gnueabihf/libQt5Core.so)
All binaries have a right arch, I think:

# file qt5lib/libQt5Core.so
qt5lib/libQt5Core.so: ELF 32-bit LSB shared object, ARM, EABI5 version 1 (GNU/Linux), dynamically linked, for GNU/Linux 4.11.0, not stripped
# file qt5lib/libQt5Core.so.5
qt5lib/libQt5Core.so.5: ELF 32-bit LSB shared object, ARM, EABI5 version 1 (GNU/Linux), dynamically linked, for GNU/Linux 4.11.0, not stripped
# file qt5lib/libQt5Core.so.5.12.0
qt5lib/libQt5Core.so.5.12.0: ELF 32-bit LSB shared object, ARM, EABI5 version 1 (GNU/Linux), dynamically linked, for GNU/Linux 4.11.0, not stripped
# file qt_c
qt_c: ELF 32-bit LSB executable, ARM, EABI5 version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux-armhf.so.3, for GNU/Linux 3.2.0, not stripped

cross compiled Qt application don't want to use cross-compiled Qt libraries.
I don't understand what's wrong :(

I'll try to use a previous version of the toolchain

r3d9u11

Looks like older compiler solved this topic.