how to add a mqtt library on qt

[OSEMO NDJUDI]

After I do all command

git clone https://github.com/qt/qtmqtt
cd qmqtt
mkdir build
cd build
qmake -r ..
make
sudo make install
when i created a project i got an error, unknown module(s) in QT : qtmqtt
it is possible to help me please

[mrjj]

Hi
maybe it was not copied to right place
try

/full path to the qt you use/qmake -query QT_INSTALL_LIBS
(like ~/Qt/5.10.0/gcc_64/bin/qmake )

and see where it points.
then look there if you have
Qt5Mqtt.so in the right folder

[OSEMO NDJUDI]

This post is deleted!

[SGaist]

Hi and welcome to devnet,

Any chances that you wrote QT += qtmqtt rather than QT += mqtt ?

[OSEMO NDJUDI]

@mrjj Hi
my QT path is ~/QT/5.15.2/gcc_64/lib.
it is normal?
thank you for the answer

[mrjj]

@OSEMO-NDJUDI

Well you can install it as you wish so any path can be normal.

Make sure you are not using a distro that has Qt already included as then there can be multiple qmake etc.

So in that libs, do you have the Qt5Mqtt file ?

else try to see where it put it with

sudo updatedb
locate Qt5Mqtt

[OSEMO NDJUDI]

@mrjj in lib I have libqt5qmqtt file.
i have a directory Qt5Mqtt in ~/lib/cmake.
how do i know if my distribution has Qt included?

[OSEMO NDJUDI]

@SGaist I wrote in QT += mqtt in my .pro file

[SGaist]

Which distribution are you using ?
Which version of a Qt are you using ?
How did you install it ?