QTCreator 6.0 can't start

[cyniu88]

@JoeCFD said in QTCreator 6.0 can't start:

locate libQt6Core.so.6 to check if there are duplicate libQt6Core

I don't understand,

what am I supposed to do?

[JoeCFD]

@cyniu88 locate is a command.
locate libQt6Core.so.6

You may need to reinstall qt creator. Link with relative path is broken. If you reinstall it and it has the same problem, it might be a Qt build problem. I will try it out at home to see I have the same problem.

[cyniu88]

locate libQt6Core.so.6

return nothing

I reinstalled QT many times, still the result is the same.
I took another PC (Windows 10 WSL Ubuntu 20) but qtcreator does not start for the same reason :(

on PC with DEBIAN qtcreatro 6.0 worsk well

[JoeCFD]

@cyniu88 Then try to use 6.0 one. Qt creator is stand alone. I will let you know if I have the same problem tomorrow.

[Christian Ehrlicher]

@cyniu88 said in QTCreator 6.0 can't start:

what am I supposed to do?

find / -name libQt6Core.so.6

[JonB]

@Christian-Ehrlicher said in QTCreator 6.0 can't start:

find / -name libQt6Core.so.6

...will be ghostly silent ;-) I think the OP should try

find / -name libQt6Core.so.6 -ls     ## or `-print` instead of `-ls` in the unlikely case your Linux doesn't accept it

[cyniu88]

comand "find" found only one place

/mnt/f/LINUX-UBUNTU/QT/Tools/QtCreator/lib/Qt/lib/libQt6Core.so.6

[JonB]

@cyniu88
There has been an on-going topic, unresolved so far, at https://forum.qt.io/topic/132524/cannot-get-any-query-output-from-executable-opt-qt-6-2-2-gcc_64-bin-qmake. It is to do with Qt Creator reporting unable to find libQt6Core.so.6 under Qt6. I have a feeling that topic and this are somehow the same issue? Maybe @Christian-Ehrlicher has a view?

I was confused there, and still am in this topic here, as to where exactly libQt6Core.so.6 => not found comes from. There are two possible ways get message

"error while loading shared libraries: libQt6Core.so.6: cannot open shared object file: No such file or directory

Either it actually cannot find a libQt6Core.so.6 file, or it can find the file but fails to load because of missing/incorrect dependencies. The error message then reports that case as "no such file" on the libQt6Core.so.6 it was trying to load.

Use ldd on existing libQt6Core.so.6 file(s) to determine whether they are loadable. Bear that in mind if you think the file should not be reporting "not found".

[cyniu88]

@JonB said in QTCreator 6.0 can't start:

Use ldd on existing libQt6Core.so.6 file(s) to determine whether they are loadable. Bear that in mind if you think the file should not be reporting "not found".

I do this a few posts above

[JonB]

@cyniu88
Yes, I see. I don't have access to Qt. If it's not huge output, can you post ls -l /mnt/f/LINUX-UBUNTU/QT/Tools/QtCreator/lib/Qt/bin, which is where qtcreator is.

[cyniu88]

here is output

cyniu@cyniu-PC:/mnt/f/LINUX-UBUNTU/QT/Tools/QtCreator/bin$ ls -l /mnt/f/LINUX-UBUNTU/QT/Tools/QtCreator/lib/Qt/bin
total 84
-rwxrwxrwx 1 root root    77 Dec  1 17:52 qt.conf
-rwxrwxrwx 1 root root 83600 Dec  1 17:52 qtdiag
cyniu@cyniu-PC:/mnt/f/LINUX-UBUNTU/QT/Tools/QtCreator/bin$

I am not sure what you mean, but qtcreator binary file is located in

Tools/QtCreator/bin

not in

Tools/QtCreator/lib/Qt/bin

[JonB]

@cyniu88 said in QTCreator 6.0 can't start:

I am not sure what you mean, but qtcreator binary file is located in

So that's the directory I would like to see!

[cyniu88]

cyniu@cyniu-PC:/mnt/f/LINUX-UBUNTU/QT/Tools/QtCreator/bin$ ls -lah
total 1.4M
drwxrwxrwx 1 root root 4.0K Dec  8 19:21 .
drwxrwxrwx 1 root root 4.0K Dec  7 23:10 ..
-rwxrwxrwx 1 root root   66 Dec  8 18:07 find.txt
-rwxrwxrwx 1 root root 388K Dec  1 17:51 qbs
-rwxrwxrwx 1 root root  44K Dec  1 17:51 qbs-config
-rwxrwxrwx 1 root root  53K Dec  1 17:51 qbs-config-ui
-rwxrwxrwx 1 root root  52K Dec  1 17:51 qbs-create-project
-rwxrwxrwx 1 root root  60K Dec  1 17:51 qbs-setup-android
-rwxrwxrwx 1 root root 218K Dec  1 17:51 qbs-setup-qt
-rwxrwxrwx 1 root root 403K Dec  1 17:51 qbs-setup-toolchains
-rwxrwxrwx 1 root root   84 Dec  1 17:52 qt.conf
-rwxrwxrwx 1 root root 110K Dec  1 17:51 qtcreator
-rwxrwxrwx 1 root root 1.4K Dec  8 09:02 qtcreator.sh
cyniu@cyniu-PC:/mnt/f/LINUX-UBUNTU/QT/Tools/QtCreator/bin$

[JonB]

@cyniu88
Yeah, clearly nothing interesting there then :) Hang on, cat needs feeding....

[JonB]

@cyniu88
If this were my problem, which it is not, and I wanted to investigate....

Like you, I believe you have shown an acceptable libQt6Core.so.6 does exist in the same location as other libraries it reports as finding successfully. Please triple-check this assumption on your system.

I am guessing the libQt6Core.so.6 => not found line actually means "cannot be loaded successfully", which I believe is what can be reported.

So, I would run ldd on all those other dependencies of qtcreator. Like, is it possible that ldd libQt6Gui.so.6 would reveal a different dependent version of another library required by libQt6Core.so.6? I don't know whether ldd qtcreator's output would tell you that in one go. (Maybe https://sourceforge.net/projects/recursive-ldd/ is useful here?) Test it for a couple of select ones if it's a lot of work, or get creative piping all the output through sort -u or similar :)

Also, do have a look at that https://forum.qt.io/topic/132524/cannot-get-any-query-output-from-executable-opt-qt-6-2-2-gcc_64-bin-qmake I referred you too. Aren't you two the same problem?

[JoeCFD]

qt creator uses relative path to link all qt libs which come with it. It is possible that there is a bug in the build script of qt creator. LD_LIBRARY_PATH is not used. Therefore, it can not start.

[JonB]

@cyniu88 I happily hand you over to @JoeCFD :)

[JoeCFD]

@JonB I have to confirm this when I get home. If it is true, we can file a bug report to Qt.

[cyniu88]

ok this sounds good, but I don't understand why the problem occurs on WSL on two separate computers, on the third computer with Debian as OS everything works fine? Are the engineers working on QT saving money on testing ? ;)

[JoeCFD]

@cyniu88 it is software engineering and bugs do exist. Do not complain too much and you may not pay anything to Qt.