How can I use the QtMqtt code?

[SGaist]

Hi,

If you use Qt 5.12, you'll already have the module with Qt so no need to build it by hand.

The Qt Creator About Box doesn't give the information about what version of Qt you are using but from the looks of it, you have Qt 5.12.2.

[JoeBermejales]

@SGaist thanks you for the instant response! but I get the following error:

Does this apply to my current config (MSVC2015 - Qt12.2.2 - W7 ) ??

[Pablo J. Rogina]

@SGaist said in How can I use the QtMqtt code?:

you'll already have the module with Qt so no need to build it by hand.

Qt MQTT is not part of "standard" Qt 5.12 distribution... From documentation:

Note: Qt MQTT is part of the Qt for Automation offering and not Qt. For further details please see Qt for Automation.

@JoeBermejales have you try building the module from command line?, like this:

git clone git://code.qt.io/qt/mqtt.git -b 5.12
cd mqtt
qmake
make
make install

[SGaist]

@Pablo-J-Rogina Good catch ! I forgot about that.

[JoeBermejales]

@Pablo-J.-Rogina said in How can I use the QtMqtt code?:

@JoeBermejales have you try building the module from command line?, like this:

Yes, but I get some errors. I did the following:

• I downloaded the qtmqtt 5.11.2 branch (corresponding to my Qt current version -in previous question and setup it was 5.12.2, but get the same error-) and extracted to the following path:

• I opened the Qt console and navigate to the path and executed the qmake and make commands that you described:

• qmake seems to be valid:

• But make is not:
  

• So I tried with mingw32-make and get the following error:

C:\Qt\5.11.2\mingw53_32\qtmqtt-5.11.2\qtmqtt-5.11.2>mingw32-make
cd src\ && ( if not exist Makefile C:\Qt\5.11.2\mingw53_32\bin\qmake.exe -o Makefile C:\Qt\5.11.2\mingw53_32\qtmqtt-5.11
.2\qtmqtt-5.11.2\src\src.pro ) && mingw32-make -f Makefile
mingw32-make[1]: Entering directory 'C:/Qt/5.11.2/mingw53_32/qtmqtt-5.11.2/qtmqtt-5.11.2/src'
cd mqtt\ && ( if not exist Makefile C:\Qt\5.11.2\mingw53_32\bin\qmake.exe -o Makefile C:\Qt\5.11.2\mingw53_32\qtmqtt-5.1
1.2\qtmqtt-5.11.2\src\mqtt\mqtt.pro ) && mingw32-make -f Makefile
mingw32-make[2]: Entering directory 'C:/Qt/5.11.2/mingw53_32/qtmqtt-5.11.2/qtmqtt-5.11.2/src/mqtt'
mingw32-make -f Makefile.Release all
mingw32-make[3]: Entering directory 'C:/Qt/5.11.2/mingw53_32/qtmqtt-5.11.2/qtmqtt-5.11.2/src/mqtt'
g++ -c -fno-keep-inline-dllexport -msse2 -mstackrealign -mfpmath=sse -O2 -std=c++1y -fno-exceptions -Wall -W -Wextra -Wv
la -Wdate-time -DUNICODE -D_UNICODE -DWIN32 -DMINGW_HAS_SECURE_API=1 -DWINVER=0x0601 -D_WIN32_WINNT=0x0601 -DQT_NO_NARRO
WING_CONVERSIONS_IN_CONNECT -DQT_BUILD_MQTT_LIB -DQT_BUILDING_QT -D_CRT_SECURE_NO_WARNINGS -D_USE_MATH_DEFINES -DQT_NO_C
AST_TO_ASCII -DQT_ASCII_CAST_WARNINGS -DQT_MOC_COMPAT -DQT_USE_QSTRINGBUILDER -DQT_DEPRECATED_WARNINGS -DQT_DISABLE_DEPR
ECATED_BEFORE=0x040800 -DQT_NO_EXCEPTIONS -DQT_NO_DEBUG -DQT_NETWORK_LIB -DQT_CORE_LIB -I. -I..\..\include -I..\..\inclu
de\QtMqtt -IC:/Qt/5.11.2/mingw53_32/qtmqtt-5.11.2/qtmqtt-5.11.2/include/QtMqtt/5.11.2 -IC:/Qt/5.11.2/mingw53_32/qtmqtt-5
.11.2/qtmqtt-5.11.2/include/QtMqtt/5.11.2/QtMqtt -Itmp -IC:\Qt\5.11.2\mingw53_32\include -IC:\Qt\5.11.2\mingw53_32\inclu
de\QtNetwork -IC:\Qt\5.11.2\mingw53_32\include\QtCore\5.11.2 -IC:\Qt\5.11.2\mingw53_32\include\QtCore\5.11.2\QtCore -IC:
\Qt\5.11.2\mingw53_32\include\QtCore -I.moc\release -IC:\openssl\include -IC:\Utils\my_sql\mysql-5.6.11-win32\include -I
C:\Utils\postgresql\pgsql\include -IC:\Qt\5.11.2\mingw53_32\mkspecs\win32-g++  -o .obj\release\qmqttclient.o qmqttclient
.cpp
In file included from qmqttclient.cpp:30:0:
qmqttclient.h:33:32: fatal error: QtMqtt/qmqttglobal.h: No such file or directory
compilation terminated.
Makefile.Release:571: recipe for target '.obj/release/qmqttclient.o' failed
mingw32-make[3]: *** [.obj/release/qmqttclient.o] Error 1
mingw32-make[3]: Leaving directory 'C:/Qt/5.11.2/mingw53_32/qtmqtt-5.11.2/qtmqtt-5.11.2/src/mqtt'
Makefile:40: recipe for target 'release-all' failed
mingw32-make[2]: *** [release-all] Error 2
mingw32-make[2]: Leaving directory 'C:/Qt/5.11.2/mingw53_32/qtmqtt-5.11.2/qtmqtt-5.11.2/src/mqtt'
Makefile:40: recipe for target 'sub-mqtt-make_first' failed
mingw32-make[1]: *** [sub-mqtt-make_first] Error 2
mingw32-make[1]: Leaving directory 'C:/Qt/5.11.2/mingw53_32/qtmqtt-5.11.2/qtmqtt-5.11.2/src'
Makefile:42: recipe for target 'sub-src-make_first' failed
mingw32-make: *** [sub-src-make_first] Error 2

C:\Qt\5.11.2\mingw53_32\qtmqtt-5.11.2\qtmqtt-5.11.2>

Any idea what is going on?

Thanks for your help

[Pablo J. Rogina]

@JoeBermejales maybe this post I did some time ago should help.

It looks like you need to ask qmake to recurse subdirs with the -r argument.

[JoeBermejales]

@Pablo-J.-Rogina thank you, but after following the suggested instructions nothing seems to work, and I had multiple errors, so I started from the beginning with Qt Creator.

1. I downloaded and extracted the 5.12.2 Mqtt version corresponding to my Qt working version.
   

2. I opened the root level .pro file

3. I configured with the Qt 5.12.2 MSVC2015 64bit version:

4. I get the following errors:

5. If i try to build the project, I get the following errors:

6. After the previous errors, I first execute qmake from Qt Creator (Build -> Run qmake) and seems to work fine with no errors:

7. I build again but the original errors remain:
   

Please, any idea?

Thanks

[SGaist]

Do you have perl installed on your machine ?

[JoeBermejales]

@SGaist yes, and I tried to reinstall Qt 5.12.2 with Mingw 7.3.0 64bits and get the same errors:

I will try in another computer, we really need the QtMqtt code to communicate to a remote device.

Thanks again @SGaist

[SGaist]

Which version of perl do you have ?

[JoeBermejales]

@SGaist

perl -v

This is perl 5, version 26, subversion 3 (v5.26.3) built for MSWin32-x64-multi-thread
(with 2 registered patches, see perl -V for more detail)

perl -V

Summary of my perl5 (revision 5 version 26 subversion 3) configuration:

  Platform:
    osname=MSWin32
    osvers=6.1.7601
    archname=MSWin32-x64-multi-thread
    uname=''
    config_args='undef'
    hint=recommended
    useposix=true
    d_sigaction=undef
    useithreads=define
    usemultiplicity=define
    use64bitint=define
    use64bitall=undef
    uselongdouble=undef
    usemymalloc=n
    default_inc_excludes_dot=define
    bincompat5005=undef
  Compiler:
    cc='C:\PROGRA~1\MINGW-~1\X86_64~1.0-W\mingw64\bin\gcc.exe'
    ccflags =' -s -O2 -DWIN32 -DWIN64 -DCONSERVATIVE -DPERL_TEXTMODE_SCRIPTS -DU
SE_SITECUSTOMIZE -DPERL_IMPLICIT_CONTEXT -DPERL_IMPLICIT_SYS -fwrapv -fno-strict
-aliasing -mms-bitfields'
    optimize='-s -O2'
    cppflags='-DWIN32'
    ccversion=''
    gccversion='4.6.3'
    gccosandvers=''
    intsize=4
    longsize=4
    ptrsize=8
    doublesize=8
    byteorder=12345678
    doublekind=3
    d_longlong=define
    longlongsize=8
    d_longdbl=define
    longdblsize=16
    longdblkind=3
    ivtype='long long'
    ivsize=8
    nvtype='double'
    nvsize=8
    Off_t='long long'
    lseeksize=8
    alignbytes=8
    prototype=define
  Linker and Libraries:
    ld='C:\PROGRA~1\MINGW-~1\X86_64~1.0-W\mingw64\bin\g++.exe'
    ldflags ='-s -static-libgcc -static-libstdc++ -L"C:\Perl64\lib\CORE" -L"C:\M
inGW\x86_64-w64-mingw32\lib"'
    libpth=C:\MinGW\x86_64-w64-mingw32\lib
    libs=-lmoldname -lkernel32 -luser32 -lgdi32 -lwinspool -lcomdlg32 -ladvapi32
 -lshell32 -lole32 -loleaut32 -lnetapi32 -luuid -lws2_32 -lmpr -lwinmm -lversion
 -lodbc32 -lodbccp32 -lcomctl32
    perllibs=-lmoldname -lkernel32 -luser32 -lgdi32 -lwinspool -lcomdlg32 -ladva
pi32 -lshell32 -lole32 -loleaut32 -lnetapi32 -luuid -lws2_32 -lmpr -lwinmm -lver
sion -lodbc32 -lodbccp32 -lcomctl32
    libc=
    so=dll
    useshrplib=true
    libperl=libperl526.a
    gnulibc_version=''
  Dynamic Linking:
    dlsrc=dl_win32.xs
    dlext=dll
    d_dlsymun=undef
    ccdlflags=' '
    cccdlflags=' '
    lddlflags='-mdll -s -static-libgcc -static-libstdc++ -L"C:\Perl64\lib\CORE"
-L"C:\MinGW\x86_64-w64-mingw32\lib"'


Characteristics of this binary (from libperl):
  Compile-time options:
    HAS_TIMES
    HAVE_INTERP_INTERN
    MULTIPLICITY
    PERLIO_LAYERS
    PERL_COPY_ON_WRITE
    PERL_DONT_CREATE_GVSV
    PERL_IMPLICIT_CONTEXT
    PERL_IMPLICIT_SYS
    PERL_MALLOC_WRAP
    PERL_OP_PARENT
    PERL_PRESERVE_IVUV
    USE_64_BIT_INT
    USE_ITHREADS
    USE_LARGE_FILES
    USE_LOCALE
    USE_LOCALE_COLLATE
    USE_LOCALE_CTYPE
    USE_LOCALE_NUMERIC
    USE_LOCALE_TIME
    USE_PERLIO
    USE_PERL_ATOF
    USE_SITECUSTOMIZE
  Locally applied patches:
    ActivePerl Build 2603 [a95bce075]
    f79ab36645 win32: Fix installsitebin and installsitescript entries in Config
_heavy.pl
  Built under MSWin32
  Compiled at Dec 17 2018 09:46:45
  @INC:
    C:/Perl64/site/lib
    C:/Perl64/lib

Edit: I tried in another computer (W7 64bits - Mingw 5.3.0 - Qt 5.11.2) and same error: QtMqtt/qmqttglobal.h file not found

[JoeBermejales]

@JoeBermejales HI, finally I modified the source code and it works!! I removed the QtMqtt/ in the includes as shown in the following screenshots:

I changed this:

For this, en every .h file:

And now it compiles!!!

Thanks to @SGaist and @Pablo-J-Rogina for your help! :)

I summarize here the way I achieved to compile and use the official Mqtt source code in Windows 7 Pro:

1. Download source code from https://github.com/qt/qtmqtt (pay attention to your Qt version)
2. Extract the zip and open the root .pro project with Qt Creator and navigate to src .h files
3. Remove all the necessary <QtMqtt/ prefixes in order the routes to be recognized and fix the path errors presented on .h files
4. Compile for your current kit (in our case, Windows 7 64 MSVC 2015 Community Edition 64 bits Qt 5.12.2)
5. Copy the .h files and lib directory to your local lib path
6. Add the following code to your .pro file (correct the relative routes if necessary)

win32:CONFIG(release, debug|release): LIBS += -L$$PWD/mqtt/lib/ -lQt5Mqtt
else:win32:CONFIG(debug, debug|release): LIBS += -L$$PWD/mqtt/lib/ -lQt5Mqttd
INCLUDEPATH += $$PWD/mqtt/src
DEPENDPATH += $$PWD/mqtt/src
win32:!win32-g++:CONFIG(release, debug|release): PRE_TARGETDEPS += $$PWD/mqtt/lib/Qt5Mqtt.lib
else:win32:!win32-g++:CONFIG(debug, debug|release): PRE_TARGETDEPS += $$PWD/mqtt/lib/Qt5Mqttd.lib

7. In your code, you can include the library classes as follow:

#include <qmqttclient.h>

[autoantwort]

I tried the same but I got the error:

$ make
cd src/ && ( test -e Makefile || C:/Qt/5.14.2/mingw73_64/bin/qmake.exe -o Makefile "C:/Users/Leander Schulten/git_projects/Lichtsteuerung.git/src/lib/qtmqtt/mqtt/src/src.pro" ) && make -f Makefile
make[1]: Entering directory '/c/Users/Leander Schulten/git_projects/Lichtsteuerung.git/src/lib/qtmqtt/mqtt/src'
cd mqtt/ && ( test -e Makefile || C:/Qt/5.14.2/mingw73_64/bin/qmake.exe -o Makefile "C:/Users/Leander Schulten/git_projects/Lichtsteuerung.git/src/lib/qtmqtt/mqtt/src/mqtt/mqtt.pro" ) && make -f Makefile
Could not find a sync.profile for 'C:/Users/Leander'
Project MESSAGE: perl -w C:\Qt\5.14.2\mingw73_64\bin\syncqt.pl -module QtMqtt -version 5.14.2 -outdir "C:/Users/Leander Schulten/git_projects/Lichtsteuerung.git/src/lib/qtmqtt/mqtt" -builddir "C:/Users/Leander Schulten/git_projects/Lichtsteuerung.git/src/lib/qtmqtt/mqtt" C:/Users/Leander Schulten/git_projects/Lichtsteuerung.git/src/lib/qtmqtt/mqtt
Project ERROR: Failed to run: perl -w C:\Qt\5.14.2\mingw73_64\bin\syncqt.pl -module QtMqtt -version 5.14.2 -outdir "C:/Users/Leander Schulten/git_projects/Lichtsteuerung.git/src/lib/qtmqtt/mqtt" -builddir "C:/Users/Leander Schulten/git_projects/Lichtsteuerung.git/src/lib/qtmqtt/mqtt" C:/Users/Leander Schulten/git_projects/Lichtsteuerung.git/src/lib/qtmqtt/mqtt
make[1]: *** [Makefile:50: sub-mqtt-make_first] Error 3
make[1]: Leaving directory '/c/Users/Leander Schulten/git_projects/Lichtsteuerung.git/src/lib/qtmqtt/mqtt/src'
make: *** [Makefile:52: sub-src-make_first] Error 2

My username contains a space and this created a problem as you can see here: Could not find a sync.profile for 'C:/Users/Leander' <- should be 'Leander Schulten'

[Pablo J. Rogina]

@autoantwort said in How can I use the QtMqtt code?:

My username contains a space and this created a problem

Avoid the problem using a path without spaces in it...