QSerialPort Library for Qt creator 4.8 on Debian 9

Digvijay · wrote on 26 Sept 2018, 11:45

Hi,

I am trying to build my ready made project (which was built on Qt creator 5.8 on windows) on Debian (32 bit) using Qt creator 4.8. I am missing QSerialPort libraries. I tried downloading the libraries but those were not supporting Qt creator 4.8. So please can anybody share link for QSerialPort libraries for Qt creator 4.8 on Debian 9. Also steps to install the library will be of great help.

Regards,
Digvijay.

[edit: fixed presentation SGaist]

SGaist · 28 Sept 2018, 04:48

Hi,

Qt Creator 4.8 has not yet been released so you are likely talking about Qt 4.8. You'll have to build the QtSerialPort module by hand yourself.

Before going further, why use Qt 4.8 on Linux since you are using 5.8 on Windows ?

kuzulis · 28 Sept 2018, 05:05

If you need to use QtSerialPort with Qt 4.8.x then you should to build it himself, e.g. using this manual. Or just try to install it from repos of your Linux distro.

Digvijay · 28 Sept 2018, 06:59

@SGaist I also do not want to use Qt 4.8. But my linux is 32 bit so i can not install Qt 5.8 which requires 64 bit linux.

Digvijay · wrote on 28 Sept 2018, 05:05

@kuzulis I had tried to built the library using link given by you. But it was not working so i created the thread on forum in the first place. I will try again. May be i am missing something(related to linux).

kuzulis · 30 Sept 2018, 04:10

@Digvijay said in QSerialPort Library for Qt creator 4.8 on Debian 9:

But it was not working

It is impossible. Please read that link more closely.

SGaist · 30 Sept 2018, 03:34

@Digvijay said in QSerialPort Library for Qt creator 4.8 on Debian 9:

@SGaist I also do not want to use Qt 4.8. But my linux is 32 bit so i can not install Qt 5.8 which requires 64 bit linux.

No it doesn't, it's just that the pre-built package is not provided any more for 32 bit.

Debian stable comes with 5.7 for all its support architectures which includes 32bit. If you need a more recent version of Qt, you can build it.

Digvijay · S SGaist 28 Sept 2018, 06:59

@SGaist Can you please tell me how to download or install this 5.7 setup??

Digvijay · 30 Sept 2018, 05:45

@kuzulis I again tried installing but it is not working. I have attached the terminal output.

epcnc@epcnc:~$ git clone git://code.qt.io/qt/qtserialport.git
Cloning into 'qtserialport'...
remote: Counting objects: 9362, done.
remote: Compressing objects: 100% (4679/4679), done.
remote: Total 9362 (delta 6198), reused 6812 (delta 4601)
Receiving objects: 100% (9362/9362), 2.51 MiB | 893.00 KiB/s, done.
Resolving deltas: 100% (6198/6198), done.
Checking connectivity... done.
epcnc@epcnc:~$ cd qtserialport
epcnc@epcnc:~/qtserialport$ git checkout qt4-dev
Branch qt4-dev set up to track remote branch qt4-dev from origin.
Switched to a new branch 'qt4-dev'
epcnc@epcnc:~/qtserialport$ echo $PATH
/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games
epcnc@epcnc:~/qtserialport$ echo $SHELL
/bin/bash
epcnc@epcnc:~/qtserialport$ export PATH=$PATH:/usr/include
epcnc@epcnc:~/qtserialport$ echo $PATH
/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games:/usr/include
epcnc@epcnc:~/qtserialport$ export PATH=$PATH:/usr/include/qt4
epcnc@epcnc:~/qtserialport$ echo $PATH
/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games:/usr/include:/usr/include/qt4
epcnc@epcnc:~/qtserialport$ git clone git://code.qt.io/qt/qtserialport.git
Cloning into 'qtserialport'...
remote: Counting objects: 9362, done.
remote: Compressing objects: 100% (4679/4679), done.
remote: Total 9362 (delta 6197), reused 6812 (delta 4601)
Receiving objects: 100% (9362/9362), 2.51 MiB | 818.00 KiB/s, done.
Resolving deltas: 100% (6197/6197), done.
Checking connectivity... done.
epcnc@epcnc:~/qtserialport$ mkdir qtserialport-build
epcnc@epcnc:~/qtserialport$ cd qtserialport-build
epcnc@epcnc:~/qtserialport/qtserialport-build$ qmake ../qtserialport/qtserialport.pro
Project MESSAGE: Cannot build current QtSerialPort sources with Qt version 4.8.6.
Project ERROR: Use at least Qt 5.0.0 or try to download QtSerialPort for Qt4.
epcnc@epcnc:~/qtserialport/qtserialport-build$

aha_1980 · 1 Oct 2018, 04:11

Hi @Digvijay,

Why do you git clone two times? After the first clone, you switched to the correct branch and the build would have worked. Also, the build directory should be outside, parallel to the sources.

So, once again the needed steps:

$ git clone git://code.qt.io/qt/qtserialport.git
$ cd qtserialport
$ git checkout qt4-dev
$ cd ..
$ mkdir qtserialport-build
$ cd qtserialport-build
$ qmake ../qtserialport/qtserialport.pro
$ make

I'm also not sure if all the PATH manipulations are needed - I guess not.

Regards

Digvijay · 1 Oct 2018, 05:59

Hi @aha_1980
Thanks for the reply. Now i can build the library but it is still not visible to Qt creator. When i add CONFIG += serialport to .pro file it is giving the error as follows
Project MESSAGE: Warning: unknown QT: serialport
So still what is going wrong??
Also can you please tell me how to install Qt 5.8 on 32 bit debian 9?? Because i do not want change my windows based GUI every time. I want directly compile project. I do not want to work in lnux environment as i am not familiar with it.

Regards,
Digvijay

jsulm · 1 Oct 2018, 11:03

@Digvijay Why do you build Qt by yourself?
As @SGaist pointed out Debian stable already provides Qt 5.7 (including 32bit).

aha_1980 · 1 Oct 2018, 12:01

Hi @Digvijay,

I guess you need to call sudo make install as last step.

But as others said, why don't you install the Qt version supplied by your distribution?

Because i do not want change my windows based GUI every time. I want directly compile project.

Sorry, I don't understand what you mean by this.

Regards

Digvijay · 1 Oct 2018, 11:24

Hi
@jsulm said in QSerialPort Library for Qt creator 4.8 on Debian 9:

As @SGaist pointed out Debian stable already provides Qt 5.7 (including 32bit).

Yes i know that Qt 5.7 is available. But i do not know how to install it. Do i need to uninstall the Qt 4.8?? And how to install it on linux??
And one important thing is i have only one day of experience in linux. So i am sorry if i am asking silly questions.

regards,
Digvijay

SGaist · wrote on 1 Oct 2018, 11:18

Then before starting to develop you should first get to know the distribution you are using. Start by looking up the Debian package manager: apt. Depending on your desktop environment you might even have a GUI on top of it.

No you don't need to uninstall anything, Qt 4 and 5 can co-exist without any problem.

jsulm · wrote on 1 Oct 2018, 11:24

@Digvijay To add to @SGaist on Ubuntu (and most probably on Debian) there as a GUI tool to install/uninstall packages: Synaptic.
Install it using: apt install synaptic

Digvijay · 1 Oct 2018, 13:42

Hi
@aha_1980 said in QSerialPort Library for Qt creator 4.8 on Debian 9:

Sorry, I don't understand what you mean by this.

What i mean is that, i have developed my application(UI) on windows. But for some reason i have to put the exe on linux. To do that i have to compile my application in linux or use cross compiler. Compiling application in linux is easier so i am trying to do that.

Regards,
Digvijay

aha_1980 · 2 Oct 2018, 10:16

@Digvijay said in QSerialPort Library for Qt creator 4.8 on Debian 9:

Compiling application in linux is easier so i am trying to do that.

Yeah, thats what we do also. Where is your problem with that?

Regarding QtSerialPort, you have several possible solutions:

use Qt5 as provided by your Linux distribution
use the Qt5 online installer for 32 bit Linux (I think the last version is Qt 5.5.1)
compile QtSerialPort for Qt4 yourself
use a Linux distribution that has a newer Qt5
compile Qt5 yourself

If you are not limited to 32 Bit Linux, you can install the newest Qt also via the 64 bit online installer.

Regards

Digvijay · wrote on 2 Oct 2018, 10:16

Hi,
Finally i have installed recent version of Qt and able to use serial library. Thanks for all the help.
Regards,
Digvijay

SGaist · 5 Oct 2018, 12:01

How did you finally install it ?

In any case, since you have it working now, please mark the thread as solved using the "Topic Tools" button so that other forum users may know a solution has been found :)