Ubuntu Qmake is not an executable

14.04 qt qt-creator qt5

11,171

If it may be useful:

To have the developer versions of Qt4 and Qt5 at the same time, and to develop using one or the other:

First I downloaded the Qt 5.4.1 offline installer from http://www.qt.io/download-open-source/, I executed it and it was installed in its default folder (in $HOME/Qt5.4.1).

To achieve that the system used that Qt 5 version as the default to develop with Qt (and so that it could find the correct qmake, etc.), I executed:

newQtchooserFolder="$HOME/.config/qtchooser"
mkdir -p "$newQtchooserFolder"
newQt5Configuration="$newQtchooserFolder/5.conf"
echo "$HOME/Qt5.4.1/5.4/gcc_64/bin" > "$newQt5Configuration"
echo "$HOME/Qt5.4.1/5.4/gcc_64/lib" >> "$newQt5Configuration"
sudo ln -sfv "$newQt5Configuration" /usr/lib/x86_64-linux-gnu/qt-default/qtchooser/default.conf

And if Qt 4 was needed to develop:

a) Temporarily: qmake -qt4 (or qmake -qt=4) could be executed instead of just qmake; or export QT_SELECT=4 could be executed and then qmake.

b) Permanently: The link /usr/lib/x86_64-linux-gnu/qt-default/qtchooser/default.conf could point to another .conf file like /usr/share/qtchooser/qt4-x86_64-linux-gnu.conf.

There's more information about those steps in man qtchooser and in http://www.linuxfromscratch.org/blfs/view/7.4/general/qtchooser.html.

11,171

DolDurma

مهدی پیشگوی هستم. برنامه نویس و توسعه دهنده اپلیکیشن های سمت سرور و اندروید

Updated on September 18, 2022

Comments

DolDurma almost 2 years
I have the latest versions of qtcreator, qt5-qmake build-essential and g++ installed.

In option of Build & Run and choose qmake in /usr/bin/qmake I get this error:
```
The qmake executable /usr/lib/i386-linux-gnu/qt4/bin/qmake could not be added: qmake '/usr/lib/i386-linux-gnu/qt4/bin/qmake' is not an executable.
```
In Home system I don't have any problem after installing those packages and setting Qmake in option

Other information:
```
tux-world@alachiq:~ > apt-cache search qt5-qmake
qt5-qmake - Qt 5 qmake Makefile generator tool

tux-world@alachiq:~ > ldd /opt/qtForArm/bin/qmake 
     ldd: /opt/qtForArm/bin/qmake: No such file or directory

tux-world@alachiq:~ > sudo chmod +x /usr/lib/i386-linux-gnu/qt4/bin/qmake
[sudo] password for tux-world: 
chmod: cannot access ‘/usr/lib/i386-linux-gnu/qt4/bin/qmake’: No such file or directory
```
- kenn almost 10 years
  
  what is the output of ls -l /usr/lib/i386-linux-gnu/qt4/bin/qmake ?
- DolDurma almost 10 years
  
  @kenn ls: cannot access /usr/lib/i386-linux-gnu/qt4/bin/qmake: No such file or directory
- kenn almost 10 years
  
  you installed qt5, why are you trying to execute qt4?
- kenn almost 10 years
  
  check out my old answer here askubuntu.com/questions/424161/…