qmake could not find a Qt installation of

Question

I have a software in ubuntu that requires me to run qmake  to generate the Makefile   However  running qmake gives back this error   qmake  could not find a Qt installation of      I have installed what I thought to be the required packages using   sudo apt-get install qt4-qmake sudo apt-get install qt5-qmake   But the error didn t go away   Any help on this would be gladly appreciated

User · Answer

I had this problem building jasmine-headless-webkit Ruby gem. Despite having qt4 installed, qmake (a symlink to qtchooser) insisted it didn't know about a QT installation. OTOH, it was able to list qt4 when asked directly.

This made everything better:

export QT_SELECT=qt4

qtchooser then knew to use qmake-qt4, and so on.

User · Answer

A symbolic link to the desired version  defined globally   sudo ln -s  usr bin qmake-qt5  usr bin qmake       or per user   sudo ln -s  usr bin qmake-qt5  home USERNAME  local bin qmake       to see if it works   qmake --version

User · Answer

sudo apt-get install qt5-default works for me     aptitude show qt5-default tells that     This package sets Qt 5 to be the default Qt version to be used when using    development binaries like qmake  It provides a default configuration for    qtchooser  but does not prevent alternative Qt installations from being used

User · Answer

if assistant is run from terminal directly  it will use the default path  usually is the  usr bin assistant  I had similar situation  to make it work  all I had to do is to find the actual installation of my qt installation bin path  like xxx Qt5 13 2 5 13 2 gcc 64 bin   type xxx Qt5 13 2 5 13 2 gcc 64 bin assisstant directly from terminal

User · Answer

For others in my situation  the solution was   qmake -qt qt5   This was on Ubuntu 14 04 after install qt5-qmake  qmake was a symlink to qtchooser which takes the -qt argument

User · Answer

Search where is qmake-qt4   which qmake-qt4   For example qmake-qt4 is in this path    usr bin qmake-qt4   Create symbolic link   cd  usr local sbin  ln -s  usr bin qmake-qt4   mv qmake-qt4 qmake   Regards

User · Answer

For my Qt 5 7  open QtCreator  go to Tools -  Options -  Build  amp  Run -  Qt Versions gave me the location of qmake

User · Answer

Install qt using  sudo apt install qt5-qmake   Open    bashrc file  vim    bashrc   Added the path below to the    bashrc file  export PATH  quot  opt Qt 5 15 1 gcc 64 bin   PATH quot    Execute load a    bashrc file in your current shell source    bashrc    Try now qmake by using the version command below  qmake --version

User · Answer

You could check path to qmake using which qmake   Consider install qt4-default or qt5-default depends what version of qt you want use   You could also use qtchooser  -  a  wrapper  used  to select between Qt development binary versions

User · Answer

I have qt4 installed   I found that using the following path worked for me  despite  which qmake  returning  usr bin qmake  which is just a link to qtchooser anyway   The following path works for me  on a 64 bit system   Running from the full path of    usr lib x86 64-linux-gnu qt4 bin qmake

User · Answer

As Debian Qt s maintainer please allow me to suggest you to not use qtx-default  Please read qtchooser s man page  the solution is described there  If you are interested in packaging an app you can also take a look at this blog post I made explaining how to do it   method 1 QT SELECT qt5 qmake    method 2  export QT SELECT qt5 qmake     more qt commands here    method 3  make -qt5  To use Qt 4  just replace the qt5 with qt4 Update 20210202  starting from Debian 11  bullseye  the packages qtx-default do not longer exist  Same goes for Ubuntu  but I don t know in which specific version  If you know of a package that still has the dependency  mostly non-Debian official packages  please file a bug  Same goes for Wiki pages  etc

[qt] qmake: could not find a Qt installation of ''

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