error : undefined reference to `qt_resourceFeatureZlib'

sberkantgulen · 28 Jul 2021, 06:02

@jsulm Thanks for answer.

I downloaded qt offline installer then i installed it on ubuntu 18.04.

qt-opensource-linux-x64-5.14.2.run
https://download.qt.io/archive/qt/5.14/5.14.2/

By the way, Qt examples work correctly.

jsulm · wrote on 28 Jul 2021, 06:02

@sberkantgulen Can you post the whole compile output?
Do you have any pre-build binaries?

sberkantgulen · 28 Jul 2021, 06:13

@jsulm said in error : undefined reference to `qt_resourceFeatureZlib':

build

Is there any difference between PKG_CONFIG ?

export PKG_CONFIG_PATH=/usr/lib/x86_64-linux-gnu/pkgconfig/
source ~/.bashrc
echo $PKG_CONFIG_PATH

jsulm · wrote on 28 Jul 2021, 06:13

@sberkantgulen This is not the whole compile output. Please do a complete rebuild and post the compile output (delete build folder, run qmake and build).

There shouldn't be any need to set PKG_CONFIG_PATH.

sberkantgulen · 28 Jul 2021, 06:21

It is so long, you can download from link below.

https://s5.dosya.tc/server4/f78313/qt_build.odt.html

jsulm · wrote on 28 Jul 2021, 06:21

@sberkantgulen Please upload a simple text file, not Open Office one (I will not open office files)...

sberkantgulen · 28 Jul 2021, 06:38

Uh, sorry..

https://s5.dosya.tc/server4/smn9tn/err.txt.html

jsulm · wrote on 28 Jul 2021, 06:38

@sberkantgulen Linker cannot find your libs:

/usr/bin/ld: cannot find -lBL
/usr/bin/ld: cannot find -lDL

You should check how you handle the dependencies between your subfolders.
g++ -Wl,-rpath,/home/kkvyz1/Qt5.14.2/5.14.2/gcc_64/lib -o PL main.o qrc_qml.o -L/usr/lib/x86_64-linux-gnu/ -L/home/kkvyz1/Desktop/dQGCS/dev/build-YKI-Desktop_Qt_5_14_2_GCC_64bit-Debug/PL/../BL/ -lBL -L/home/kkvyz1/Desktop/dQGCS/dev/build-YKI-Desktop_Qt_5_14_2_GCC_64bit-Debug/PL/../DL/ -lDL -lcairo -lQt5GStreamerQuick-1.0 -lQt5Quick -lQt5Gui -lQt5Qml -lQt5Network -lgstvideo-1.0 -lgstbase-1.0 -lgstreamer-1.0 -lgobject-2.0 -lglib-2.0 -lQt5GStreamer-1.0 -lQt5GLib-2.0 -lQt5Core /home/kkvyz1/Qt5.14.2/5.14.2/gcc_64/lib/libQt5Quick.so /home/kkvyz1/Qt5.14.2/5.14.2/gcc_64/lib/libQt5Gui.so /home/kkvyz1/Qt5.14.2/5.14.2/gcc_64/lib/libQt5QmlModels.so /home/kkvyz1/Qt5.14.2/5.14.2/gcc_64/lib/libQt5Qml.so /home/kkvyz1/Qt5.14.2/5.14.2/gcc_64/lib/libQt5Network.so /home/kkvyz1/Qt5.14.2/5.14.2/gcc_64/lib/libQt5Core.so -lGL -lpthread

sberkantgulen · 28 Jul 2021, 06:55

@jsulm said in error : undefined reference to `qt_resourceFeatureZlib':

how you handle the dependencies between your subfolders.

My project's pro file like this:

TEMPLATE = subdirs

SUBDIRS += \
    DL \
    BL \
    PL

And other .pro files like this:

How exactly should I make a change?
Also this project works when I auto-install with 5.9.

jsulm · wrote on 28 Jul 2021, 06:55

@sberkantgulen Take a look at https://doc.qt.io/qt-5/qmake-variable-reference.html#subdirs, especially the *.depends part. You need to specify the dependencies between your subdirs.

sberkantgulen · 28 Jul 2021, 07:29

Thank you, I will do some more research on these issues.

But i still can not understand. Everything works when i use cmd.
If there is a problem about dependencies how project works on Qt 5.9 ?

What is the difference between offline installation and command line installation ?
I can not understand. Qt 5.12 and Qt 5.14 give me error..

jsulm · wrote on 28 Jul 2021, 07:29

@sberkantgulen I don't know why it works with Qt 5.9, maybe that version handles build folders with subdirs projects differently than newer version and you were simply lucky.

"What is the difference between offline installation and command line installation ?" - I guess by "command line installation" you mean installing using apt? Using apt you install Qt built and packaged by your Linux distribution. If you use offline/online installer you use official Qt builds from Qt Company.

sberkantgulen · 28 Jul 2021, 07:56

Yes, i mean when i install from terminal with command:

sudo apt-get install qt5-default

It installs Qt 5.9.5.
And everything is okey. For example i can run qtcreator from terminal with:

sudo ./qtcreator

But, when i install qt with offline installer i can't do same things.
Terminal can not find qtcreator when i run:

sudo ./qtcreator

I thought there might be a problem with the paths. But no matter what I did, I couldn't solve it.

jsulm · wrote on 28 Jul 2021, 07:56

@sberkantgulen said in error : undefined reference to `qt_resourceFeatureZlib':

sudo ./qtcreator

Why do you start QtCreator with sudo?! This is not needed at all!

To start QtCreator installed using offline/online installer you simply have to use absolute path. On my machine it is:

~/Qt/Tools/QtCreator/bin/qtcreator

sberkantgulen · 28 Jul 2021, 08:19

Yes, i mean;

Maybe problem can be about file association . I wanted to point this out .
It's like it can't see the libraries and therefore cannot mount sub-directories.
AM i wrong?

jsulm · wrote on 28 Jul 2021, 08:19

@sberkantgulen Not sure what you mean. QtCreator has nothing to do with building of your app (you can build in a terminal without QtCreator). Also, nothing is mounted. The problem is that linker can't find the libraries. That means those libraries are not located in the folders you pass to the linker (like here: -L/home/kkvyz1/Desktop/dQGCS/dev/build-YKI-Desktop_Qt_5_14_2_GCC_64bit-Debug/PL/../DL). So, I suggest you really take a look at the link I gave you and define the dependencies between your subfolders properly.

sberkantgulen · 28 Jul 2021, 10:30

I mean, my problem can be like this topic:
https://forum.qt.io/topic/107933/undefined-reference-to-qt_resourcefeaturezlib

And i don't know how can i change libraries.

jsulm · wrote on 28 Jul 2021, 10:30

@sberkantgulen The problem from your last compile log has nothing to do with resourcefeaturezlib...

sberkantgulen · wrote on 28 Jul 2021, 11:26

@jsulm said in error : undefined reference to `qt_resourceFeatureZlib':

The problem from your last compile log has nothing to do with resourcefeaturezlib...

You are right. I built my project step by step. And i added every code block line by line.

Problem is about gstreamer.

PKGCONFIG += gstreamer-1.0 gstreamer-video-1.0 #Qt5GStreamer-1.0 #Qt5GStreamerQuick-1.0

When i add this line there is no error in my project.
But i uncomment 2 packages which are #Qt5GStreamer-1.0 #Qt5GStreamerQuick-1.0 , and they cause an error.

PKGCONFIG += gstreamer-1.0 gstreamer-video-1.0 Qt5GStreamer-1.0 Qt5GStreamerQuick-1.0

Probably qt can't find the path for gstreamer.

SGaist · wrote on 28 Jul 2021, 18:44

Hi,

Might be a silly question but did you install the corresponding development packages ?