Compile MQTT library & need to update to latest 5.11

[bhu24]

Hie
I want to use MQTT for my project but i am unable to use "qtmqtt" library as i follow mostly possible solution but it fails
one of the step which i follow:

add in .pro file
QT += mqtt

To use a Qt module, it must be installed in the Qt lib directory.
First, retrieve the lib directory path executing this command from a terminal:

qmake -query QT_INSTALL_LIBS

Cd into that directory and check if a file called Qt5Mqtt.dll is there: if not, you must build/install the module.
To get the module source code, you can execute this git command:

git clone git://code.qt.io/qt/qtmqtt.git

Once you have the source files, cd into the source files directory containing the file qtmqtt.pro and run these commands:

qmake
make
make install

(you may need administrator privileges for the last one).
After the commands completed successfully, you should be able to see the library in the QT_INSTALL_LIBS directory, and use the module in a Qt project.

In case of compilation issues, open the qtmqtt.pro file with creator, and try to build the library from there, then manually install (copy) it into the QT_INSTALL_LIBS.

( 2 ) platform details is as follow :

O.S => Ubuntu 14.04
QT => qt Creator 4.8.1
QMake version 3.0
Using Qt version 5.2.1 in /usr/lib/x86_64-linux-gnu

is i want to update to qt version 5.11 so is it possible on "ubuntu 14.04"?? on update ubuntu to 16.04???
because i already tried offline installer using "qt-opensource-linux-x64-5.11.1.run" file

[kkoehne]

Hi, and welcome to the forum.

It's unclear to me what exactly fails for you. Have you followed the steps described? Is something in the manual unclear to you?

[bhu24]

Thanks for reply.
Actually problem is "qtmqtt" is not compile on my Qt creator.
Yes, i followed described steps.
Please let me know this problem is because of qt 5.2.1 version???
i read somewhere for "qtmqtt" compilation required higher version of >5.7 so on my ubuntu 14.04 please let me know how to install higher version.!! As mentioned in question as follows:

O.S => Ubuntu 14.04
QT => qt Creator 4.8.1
QMake version 3.0
Using Qt version 5.2.1 in /usr/lib/x86_64-linux-gnu

if i want to update to qt version 5.11 so is it possible on "ubuntu 14.04"?? or update ubuntu to 16.04???
because i already tried offline installer using "qt-opensource-linux-x64-5.11.1.run" file

Thanks for help!

[aha_1980]

@bhu24 said in Compile MQTT library & need to update to latest 5.11:

because i already tried offline installer using "qt-opensource-linux-x64-5.11.1.run" file

And what happened? (We want the exact error message!)

[aha_1980]

This post is deleted!

[bhu24]

Question ->. because i already tried offline installer using "qt-opensource-linux-x64-5.11.1.run" file

Answer :- it not given error is installed version of 5.2.1 on system
QMake version 3.0
Using Qt version 5.2.1 in /usr/lib/x86_64-linux-gnu

1. When run from terminal got following error after running "sudo make" Command
   .
   .
   .
   .
   In file included from qmqttclient.cpp:31:0:
   qmqttclient_p.h:49:31: fatal error: private/qobject_p.h: No such file or directory
   #include <private/qobject_p.h>
   ^
   compilation terminated.
   make[2]: *** [.obj/qmqttclient.o] Error 1
   make[2]: Leaving directory /home/balkrishna/qtmqtt/src/mqtt' make[1]: *** [sub-mqtt-make_first] Error 2 make[1]: Leaving directory /home/balkrishna/qtmqtt/src'
   make: *** [sub-src-make_first] Error 2

2. qtmqtt.pro file with creator, i try to build library then Got following error

/home/balkrishna/qtmqtt/src/mqtt/qmqttclient_p.h:49: error: private/qobject_p.h: No such file or directory
#include <private/qobject_p.h>
^

[aha_1980]

@bhu24

I don't think QtMQTT will work with Qt 5.2.1.

My questions was, what happened when you:

tried offline installer using "qt-opensource-linux-x64-5.11.1.run" file

?

[bhu24]

@aha_1980
i already told you about the same

Answer :- it installed successfully but after installation got "qt version of 5.2.1" on ubuntu 14.04 system instead of "qt version of 5.11.1"

Command to check qt version
=> qmake --version
=> QMake version 3.0
Using Qt version 5.2.1 in /usr/lib/x86_64-linux-gnu

[SGaist]

Hi,

Use the full path to the qmake executable of the Qt version your want to use.

You are currently using your distribution provided Qt.

[aha_1980]

@bhu24

Answer :- it installed successfully but after installation got "qt version of 5.2.1" on ubuntu 14.04 system instead of "qt version of 5.11.1"

Ah sorry, I didn't get this :(

As @SGaist said, you must call qmake with full path if you have multiple versions installed.

But then it should work - good luck.

Regards

[bhu24]

@SGaist thanks got qmake 5.11.1 and now got error while compiling "qtmqtt" Library

error: error: unrecognized command line option '-std=c++1z'
error: error: unrecognized command line option '-Wdate-time'

@aha_1980 thnaks to you also

[aha_1980]

@bhu24 said in Compile MQTT library & need to update to latest 5.11:

error: error: unrecognized command line option '-std=c++1z'

I'm not sure why c++1z (= "c++17") is forced, but your compiler may be too old for that.

Can you see if c++1z is given in any of the .pro or .pri files?

[bhu24]

@aha_1980 still issue is not resolved

Previous - error: error: unrecognized command line option '-std=c++1z'
NEW - error: [.pch/Qt5Mqtt.gch/c++] Error 1

one error gone but new issue arise!!!

Solved issue - error: error: unrecognized command line option '-Wdate-time'

[SGaist]

That's because you're currently using an out of date compiler.

[bhu24]


Here i am sending screenshot's of my 1. Qt version 2. Compilers 3. Cmake
So please let me is any thing i am missing so facing this issue!!!!!!

[jsulm]

@bhu24 This is quite a big list of compilers! Do you really need all of them (4.7, 4.8, 4.9)?
Which compiler do you use? Which is set as compiler in the Kit you're using?

[bhu24]

@jsulm my requirement is to compile "MQTT" library which need qt 5.11.1 higher version and compiler 4.9 as per my knowledge please suggest me solution on same.
Thanks for help!!

[jsulm]

@bhu24 Did you check whether GCC 4.9 is really set in your Kit?

[bhu24]

@jsulm yes as you can see in screen shot

1. Got compiler output window as follows:
   home/balkrishna/Desktop/qt/qtmqtt/include/QtMqtt/QtMqttDepends -o .pch/Qt5Mqtt.gch/c++
   g++: error: unrecognized command line option '-std=c++1z'
   make[2]: Leaving directory /home/balkrishna/build-qtmqtt-Qt_5_11_1-Debug/src/mqtt' make[1]: Leaving directory /home/balkrishna/build-qtmqtt-Qt_5_11_1-Debug/src'
   make[2]: *** [.pch/Qt5Mqtt.gch/c++] Error 1
   make[1]: *** [sub-mqtt-make_first] Error 2
   make: *** [sub-src-make_first] Error 2
   12:29:01: The process "/usr/bin/make" exited with code 2.
   Error while building/deploying project qtmqtt (kit: Qt 5.11.1)
   When executing step 'Make'

2. In Genral message window shows following :

/home/balkrishna/Qt5.11.1/5.11.1/gcc_64/mkspecs/features/qmake_use.prf(6): 'take_first' is not a recognized replace function.
Project ERROR: Library '' is not defined.
/home/balkrishna/Qt5.11.1/5.11.1/gcc_64/mkspecs/features/qmake_use.prf(6): 'take_first' is not a recognized replace function.
Project ERROR: Library '' is not defined.

3. In Issue window show following:

error: error: unrecognized command line option '-std=c++1z'
error: [.pch/Qt5Mqtt.gch/c++] Error 1

Any thing is wrong from my side so please let me know and suggest which things should i cross check to resolve this issue

[jsulm]

@bhu24 said in Compile MQTT library & need to update to latest 5.11:

yes as you can see in screen shot

No, I can't as you did not post the screen-shot of your Kit...