Fatal error: QtMqtt/qmqttglobal.h: No such file or directory

20Stefan05

Hello. I am trying to install mqtt in linux. I have downloaded the source files from github. Qmake works fine, but make gives this error: fatal error: QtMqtt/qmqttglobal.h: No such file or directory. I have also searched for qmqttglobal.h and it is at its place. My operating system is Linux and my qt version is 5.12.4. What else should I try?

Pablo J. Rogina

@20Stefan05 have you built and install the QtMqtt module?

20Stefan05

@Pablo-J-Rogina, I don't think so.I have tried to build it in the qt creator, but it had many errors. How should I install and build the module?

eyllanesc

@20Stefan05 You shouldn't use Qt Creator to compile mqtt, instead run the following in terminal:

git clone https://github.com/qt/qtmqtt.git
cd qtmqtt
qmake .
make 
sudo make install

20Stefan05

@eyllanesc I did that, but at running make, I get Fatal error: QtMqtt/qmqttglobal.h: No such file or directory

SGaist

Hi,

Are you sure you are using the correct version of Qt to build that module ?

Do you have pearl installed ?
Did you checkout the correct branch ?

20Stefan05

@SGaist I have pearl installed. I am using Qt 5.12.4.

SGaist

You did not answer all questions.

Beside that, are you using the full path to qmake ?

20Stefan05

@SGaist I don't know what is the correct branch. At the qmake I am entering the qtmqtt directory and just type "qmake".

SGaist

Usually you would use the branch matching the Qt version you want to use.

How did you install Qt 5.12.4 ?

20Stefan05

@SGaist I have installed the qt maintenance tool and from it - the Qt 5.12.4. Should I try to make it in the Qt/5.12.4/gcc_64/bin?

SGaist

As I already wrote, use the full path to qmake. Otherwise you are going to use your distribution provided Qt.