Symbol lookup error (undefined symbol) when deploying Qt5 app on clear Ubuntu machine

c1tru55

Hi!

I created default Qt5 widgets application, compiled is as a release on Ubuntu and prepare directory with next files:

But when I run app.sh script on another Ubuntu machine (without installed Qt5), I get next error:

@symbol lookup error: /path/to/app/./libQt5Widgets.so.5: undefined symbol: _ZTI15QGuiApplication@

How fix it? Thanks in advance,

SGaist

Hi and welcome to devnet,

Do you also have libQt5Gui deployed ?

c1tru55

Hi and thanks!

yes, I have libQt5Gui.so.5 library also in same dir...

SGaist

Then run ldd on your executable from your script to see if there's something missing

c1tru55

Done it previously several times using:
LD_LIBRARY_PATH=. ldd app
but there are no not found libraries!

SGaist

LD_LIBRARY_PATH=. is not a good idea, you should rather give the full path of the folder containing your application