xcb platform plugin missing with a Qt kit compiled from Qt sources

Lini

Hello everyone,

I have some trouble launching my Qt5 application with a Qt5 kit compiled from the sources.
Here is what I did :

download Qt5.9.2 sources from installer (qt-unified-linux-x64-3.0.0-online.run)
configure :

./configure -debug -nomake examples -nomake tests -skip 3d -skip androidextras -skip charts -skip canvas3d -skip gamepad -skip location -skip multimedia -skip purchasing -skip qtwebengine -skip quick1 -skip quickcontrols -skip sensors -skip script -skip tools -skip webchannel -skip websockets -skip winextras

and then make:

make

add a kit in QtCreator linked to the Qt version I have compiled (/opt/Qt/5.9.2/Src/gtbase/bin/qmake)

After that my application compiles just fine but I have this error after launching it :

This application failed to start because it could not find or load the Qt platform plugin "xcb"
in "".

If I compile and launch the application from the binaries downloaded using the Qt installer, I don't have any error and the application runs just fine.
I want to use Qt sources in order to have a complete stack tree in debug mode.

Am I doing something wrong ?
Thank you in advance for any help provided.

Florian.

SGaist

Hi,

Might be a silly question but did you call make install after the build has finished ?

Lini

Hi and thank you for your quick answer,

Actually this was not a silly question at all because I did not call any make install... The reason is that I only wanted to compile Qt, not install it. But it seems that everything works like a charm after the make install. My application can now launch and I have the whole stack tree. That is all that matters to me.
Again, thank you for the answer that solved my issue.

Florian