Error while loading shared libraries: libQt5Bluetooth.so.5

Yaldiz

Hi,

Following libraries exist in Embedded Device SDKs;

-rw-r--r-- 1 root root 1218 Mar 23 21:52 libQt5Bluetooth.prl
lrwxrwxrwx 1 root root 25 Mar 23 21:52 libQt5Bluetooth.so -> libQt5Bluetooth.so.5.14.2
lrwxrwxrwx 1 root root 25 Mar 23 21:52 libQt5Bluetooth.so.5 -> libQt5Bluetooth.so.5.14.2
lrwxrwxrwx 1 root root 25 Mar 23 21:53 libQt5Bluetooth.so.5.14 -> libQt5Bluetooth.so.5.14.2
-rwxr-xr-x 1 root root 750964 Mar 23 21:52 libQt5Bluetooth.so.5.14.2

When i run the application on the target device gives this error:
error while loading shared libraries: libQt5Bluetooth.so.5: cannot open shared object file: No such file or directory

NOTE: I added
Qt += bluetooth
LIBS += -L/opt/tdx-xwayland/5.6.0/sysroots/armv7at2hf-neon-tdx-linux-gnueabi/usr/include -lbluetooth

How can i use bluetooth libraries?

Best Regards.

sierdzio

@Yaldiz said in Error while loading shared libraries: libQt5Bluetooth.so.5:

Qt += bluetooth

This needs to be QT

LIBS += -L/opt/tdx-xwayland/5.6.0/sysroots/armv7at2hf-neon-tdx-linux-gnueabi/usr/include -lbluetooth

Library in /include folder? Looks suspicious, check if it's a good path.

Yaldiz

unix:!macx: LIBS += -L$$PWD/../../../../../opt/tdx-xwayland/5.6.0/sysroots/armv7at2hf-neon-tdx-linux-gnueabi/usr/lib/ -lQt5Bluetooth

INCLUDEPATH += $$PWD/../../../../../opt/tdx-xwayland/5.6.0/sysroots/armv7at2hf-neon-tdx-linux-gnueabi/usr/include/QtBluetooth
DEPENDPATH += $$PWD/../../../../../opt/tdx-xwayland/5.6.0/sysroots/armv7at2hf-neon-tdx-linux-gnueabi/usr/include/QtBluetooth

I tried like this gives same error.

NOTE: Project compiling succesfully but when i try to run executable file on the target gives this error.

sierdzio

@Yaldiz said in Error while loading shared libraries: libQt5Bluetooth.so.5:

NOTE: Project compiling succesfully but when i try to run executable file on the target gives this error.

Add /opt/tdx-xwayland/5.6.0/sysroots/armv7at2hf-neon-tdx-linux-gnueabi/usr/lib/ to LD_LIBRARY_PATH, then.

Yaldiz

I tried following rule;

LD_LIBRARY_PATH=/opt/tdx-xwayland/5.6.0/sysroots/armv7at2hf-neon-tdx-linux-gnueabi/usr/lib/:${LD_LIBRARY_PATH}

same error still exist.

JoeCFD

Since bluetooth is a Qt component, you do not need to add it to LIBS. Just like core gui widgets, right? They are added automatically.

Yaldiz

Yes, i understand it but i tried theese rules ;
Qt += bluetooth and mentioned way theese gives same errors.

sierdzio

As mentioned, it HAS TO BE QT (both letters capital). Qt won't do! And after you change anything in .pro file, it's best to make a full rebuild - remove build dir, run qmake and make again.

Other libs (core, gui, etc.) link correctly right?

It's a long shot, but maybe check if your bluetooth lib is compiled for correct architecture:

readelf -h /opt/tdx-xwayland/5.6.0/sysroots/armv7at2hf-neon-tdx-linux-gnueabi/usr/lib/libQt5Bluetooth.so.5.14.2

Yaldiz

core, gui, dbus, network linked correctly.

I can use sqlite3 with following rule.
LIBS += -L/opt/tdx-xwayland/5.6.0/sysroots/armv7at2hf-neon-tdx-linux-gnueabi/usr/include -lsqlite3

Project compiled for correct architecture(ARM).

ELF Header:
Magic: 7f 45 4c 46 01 01 01 00 00 00 00 00 00 00 00 00
Class: ELF32
Data: 2's complement, little endian
Version: 1 (current)
OS/ABI: UNIX - System V
ABI Version: 0
Type: DYN (Shared object file)
Machine: ARM
Version: 0x1
Entry point address: 0x19bf8
Start of program headers: 52 (bytes into file)
Start of section headers: 749924 (bytes into file)
Flags: 0x5000400, Version5 EABI, hard-float ABI
Size of this header: 52 (bytes)
Size of program headers: 32 (bytes)
Number of program headers: 6
Size of section headers: 40 (bytes)
Number of section headers: 26
Section header string table index: 25
readelf: Warning: Separate debug info file /opt/tdx-xwayland/5.6.0/sysroots/armv7at2hf-neon-tdx-linux-gnueabi/usr/lib/libQt5Bluetooth.so.5.14.2 found, but CRC does not match - ignoring

Best Regards.

sierdzio

Yep, looks correct.

libQt5Bluetooth.so.5.14.2 found, but CRC does not match

Is this only about the symlink or the file is corrupt?

Anyway, I've run out of ideas, sorry :-(

Yaldiz

Thanks for the help and for your time :)

pasi

It does not help if the bluetooth library is in the SDK. Error clearly states that it's not found in actual device. Also very suspicious that in the SDK path you have Qt version 5.6.0 but then bluetooth library is version 5.14.2. So do you actually have Qt 5.6.0 and you've just replaced/added bluetooth library from newer Qt5 version? That would explain the readelf warning.