11

The question is, before I try to build supercollider from source, making sure that I am using Qt5. Problem is this:

jsimon@edgy:~$ qmake -v
qmake: could not exec '/usr/lib/x86_64-linux-gnu/qt4/bin/qmake': No such file or directory
jsimon@edgy:~$ locate qmake
/usr/bin/qmake

I think is there something misconfigured with qtchooser, docs here:

Qtchooser man page

and here:

Qtchooser on Linux from Scratch

More digging, there is a directory with some symlinks in it:

jsimon@edgy:/usr/lib/x86_64-linux-gnu/qtchooser$ ls -al
lrwxrwxrwx   1 root root    50 Sep  1 06:04 4.conf -> ../../../share/qtchooser/qt4-x86_64-linux-gnu.conf
lrwxrwxrwx   1 root root    50 Sep  1 06:04 5.conf -> ../../../share/qtchooser/qt5-x86_64-linux-gnu.conf
lrwxrwxrwx   1 root root    50 Sep  1 06:04 qt4.conf -> ../../../share/qtchooser/qt4-x86_64-linux-gnu.conf
lrwxrwxrwx   1 root root    50 Sep  1 06:04 qt5.conf -> ../../../share/qtchooser/qt5-x86_64-linux-gnu.conf

And another deeper directory with what looks to me like the problem, a symlink giving Qt4 as the default:

jsimon@edgy:/usr/lib/x86_64-linux-gnu/qt-default/qtchooser$ ls -al
lrwxrwxrwx 1 root root   53 Sep  1 06:04 default.conf -> ../../../../share/qtchooser/qt4-x86_64-linux-gnu.conf

Some information from qtchooser:

jsimon@edgy:~$ qtchooser -print-env
QT_SELECT="default"
QTTOOLDIR="/usr/lib/x86_64-linux-gnu/qt4/bin"
QTLIBDIR="/usr/lib/x86_64-linux-gnu"

Looking at this page, it ought to be simple:

Handling Multiple Qt Versions

However:

jsimon@edgy:~$ export QT_SELECT=qt5
jsimon@edgy:~$ printenv
[snip]
QT_SELECT=qt5
[snip]
jsimon@edgy:~$ qmake -v
qmake: could not exec '/usr/lib/x86_64-linux-gnu/qt5/bin/qmake': No such file or directory

Back where we're started, no change. Now what?

Zanna
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J. Simon van der Walt
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  • Have you read the readme for supercollider located here. It details several dependencies to install including Qt. It also details how to set the path to Qt when you build (for both a repository install or an install from the Qt website). It shouldn't be necessary to use qtchooser. – gsxruk Sep 02 '16 at 13:52
  • Yes, I've studied that closely, and discussed the issue on the supercollider mailing list. http://new-supercollider-mailing-lists-forums-use-these.2681727.n2.nabble.com/Build-3-7-2-from-source-on-ubuntu-16-04-td7627556.html#a7627596 – J. Simon van der Walt Sep 02 '16 at 14:51
  • It just seemed to me that qtchooser was probably the 'right' way to do this. – J. Simon van der Walt Sep 02 '16 at 14:52
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    If the primary error is could not exec '/usr/lib/x86_64-linux-gnu/qt5/bin/qmake': No such file or directory, that would suggest you need to install (or re-install) the qt5-qmake package – steeldriver Sep 02 '16 at 14:56
  • Solved! Thanks. I didn't realise that qmake and qt were two different things. Installing qt5-qmake using Synaptic seems to fix everything. Umm, how does this work, is there some way I now mark this question as solved, or answered? – J. Simon van der Walt Sep 02 '16 at 15:17
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    In my case qt5-qmake was already installed, and I still had this problem. My solution was to change the link sudo ln -s -T /usr/share/qtchooser/qt5-x86_64-linux-gnu.conf /usr/lib/x86_64-linux-gnu/qt-default/qtchooser/default.conf -f – dafnahaktana Oct 05 '18 at 09:10

1 Answers1

7

All of this turned out to be a red herring: all that was needed was to install qmake, for example:

sudo apt install qt5-qmake
Zanna
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J. Simon van der Walt
  • 313