Undefined reference to qDebug

ayush_mistral

Hi,

There are some common libQt5*.so files also present in the path /usr/lib/x86_64-linux-gnu

Thanks and Regards
Ayush

kshegunov

@ayush_mistral
Okay, then this: "Make sure you're running the qmake that came with the package you installed, and not a system-wide installed one." is quite relevant.
Use the qmake that came with the package you installed. You can find it somewhere in the /home/mistral/Qt/.../bin folder. You go to your project, run make clean, then use the correct qmake to create the Makefile anew, and then you make your project again.

Kind regards.

ayush_mistral

@kshegunov

Hi I found the qmake executable in the path Qt5.5/gcc_64/bin folder

Can you please tell me which tab should I change in qt projects tab to provide the path for the appropriate qmake?

kshegunov

@ayush_mistral
Actually you set up a kit for QtCreator and then change the kit for your project. To make your kit work with the Qt you've downloaded just specify the correct qmake executable and a name that you'd recognize.
The kit your project uses is on the projects page, up-most, just below the name of the project. You have the kit name there and under it two buttons - build and run. Pointing at the kit name ("Qt 5.6 64 bit" in my case) will cause a down arrow to show next to the text. Clicking the arrow there's a context menu that has Change kit on it, and you just select the one you like. After changing the kit, do a full rebuild of your project.

Kind regards.

ayush_mistral

@kshegunov

Hi,

I have the following settings in the newly created kit

Name- cppunit_qt
Device type - desktop
Device - Local PC
Compiler - GCC (x86 64bit in /usr/bin)
Debugger - System GDB at /usr/bin/gdb

Try to make clean and rebuild the project still the error is the same
Can you please tell me if I am missing something or doing something wrong?

Thanks and Regards
Ayush
Qt Version - Qt5.5.1GCC 64bit

jsulm

@ayush_mistral Which Qt version did you set in that kit?

ayush_mistral

@jsulm

I set 5.5.1

kshegunov

@ayush_mistral
But with which qmake that is? If you go to the "Manage kits" page and look at the "Qt versions" tab you see that there's a qmake location column. You'd want to have the version you use to match the qmake you have in the manually installed directory. I have the following table:

Auto-detected
    Qt 5.5.1 in PATH (System)         /usr/bin/qmake
Manual
    Qt 5.6.0 (qt5)                    /home/nye/Programming/C++/qt/qt-5.6/qtbase/bin/qmake
    Qt 5.7.0 (qt-dev)                 /home/nye/Programming/C++/qt/qt-dev/qtbase/bin/qmake

Any of those can be used to make a kit, however in your case you need to make sure to use the one you installed from the SDK package.

Kind regards.

asanka424

@kshegunov sorry I was replyin from my phone and seems like reply gone to you.

ayush_mistral

@kshegunov

Hi,

In the QT versions tab of my newly created kit the path for the qmake is the same in the manually installed directory (/mistral/QT/5.5/gcc_64/bin/qmake). I also tried to change the qmake and added in the QT version present in path /usr/bin/qmake but still the error is same

Thanks and Regards
Ayush

kshegunov

@ayush_mistral
Hello,

In the QT versions tab of my newly created kit the path for the qmake is the same in the manually installed directory (/mistral/QT/5.5/gcc_64/bin/qmake)

This should be okay. I honestly am out of ideas ...

Kind regards.

eureka

Spotting your earlier post ...

"There are some common libQt5.so files also present in the path /usr/lib/x86_64-linux-gnu"

Since all ideas are exhausted I will venture a suggestion (as a beginner). A fresh installation.

...

When I migrated from Qt4 to Qt 5.5.1 I got myself in quite a stew with conflicts with legacy Qt libraries. So I decided to start afresh.

I purged all old versions of Qt 4 and Qt 5.
I purged remaining libraries in /usr/lib/x86_64-linux-gnu (actually mine were in x86_32-linux-gnu)
I installed Qt 5.5.1 using workflow here ...

https://launchpad.net/~beineri/+archive/ubuntu/opt-qt551-trusty

and followed some other threads

http://askubuntu.com/questions/279421/how-can-i-install-qt-5-x-on-12-04-lts

ftp://ftp.oregonstate.edu/.2/lfs-website/blfs/view/svn/x/qt5.html

I ran command .. qmake --version

(see options by running command .. man qmake)

QMake version 3.0
Using Qt version 5.5.1 in /opt/qt55/lib

qtchooser -print-env
QT_SELECT="default"
QTTOOLDIR="/opt/qt55/bin"
QTLIBDIR="/opt/qt55/li"

I edited ~/.profile as follows (two lines)

export QT5PREFIX="/opt/qt55"
export LD_LIBRARY_PATH="/opt/qt55/bin":${LD_LIBRARY_PATH}

I checked and edited the paths in Qt Creator

And I was then out of my conflicts mess.
But this is just a hunch that you have conflicts as I did.
I would put your Qt 5.5.1 installation in /opt/qt55