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Including MQTT wrapper for mosquitto library on windows

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  • jsulmJ jsulm

    @Dean21 said in Including MQTT wrapper for mosquitto library on windows:

    INCLUDEPATH += C:/Program Files/mosquitto/devel

    Are the header files directly inside this folder or in a subfolder?

    Christian EhrlicherC Offline
    Christian EhrlicherC Offline
    Christian Ehrlicher
    Lifetime Qt Champion
    wrote on last edited by
    #3

    @jsulm The path contains spaces and is not properly quoted.

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    1 Reply Last reply
    2
    • jsulmJ jsulm

      @Dean21 said in Including MQTT wrapper for mosquitto library on windows:

      INCLUDEPATH += C:/Program Files/mosquitto/devel

      Are the header files directly inside this folder or in a subfolder?

      D Offline
      D Offline
      Dean21
      wrote on last edited by
      #4

      @jsulm yes for the mosquitto.h and mosquittopp.h they are directly in that folder

      1 Reply Last reply
      0
      • jsulmJ jsulm

        @Dean21 said in Including MQTT wrapper for mosquitto library on windows:

        INCLUDEPATH += C:/Program Files/mosquitto/devel

        Are the header files directly inside this folder or in a subfolder?

        D Offline
        D Offline
        Dean21
        wrote on last edited by
        #5

        @jsulm Also if I include the quotes i get lots of different errors such as 964a3e67-f886-41f2-affb-bd74bd29cd6a-image.png

        jsulmJ D 2 Replies Last reply
        0
        • D Dean21

          @jsulm Also if I include the quotes i get lots of different errors such as 964a3e67-f886-41f2-affb-bd74bd29cd6a-image.png

          jsulmJ Offline
          jsulmJ Offline
          jsulm
          Lifetime Qt Champion
          wrote on last edited by
          #6

          @Dean21 Now you get linker errors, which means you're not linking properly or the lib is not compatible because of different compiler. Did you also fix your LIBS part in pro file (quotes)?

          https://forum.qt.io/topic/113070/qt-code-of-conduct

          1 Reply Last reply
          0
          • D Dean21

            @jsulm Also if I include the quotes i get lots of different errors such as 964a3e67-f886-41f2-affb-bd74bd29cd6a-image.png

            D Offline
            D Offline
            Dean21
            wrote on last edited by
            #7

            @Dean21 Yes I also fixed the libs part in the pro file with the quotes as well.
            So what can I do to try and get it to link, the kit used when I made this project says it is Desktop Qt 6.4.1 MinGW 64-bit for the compiler.

            Thanks for the help

            jsulmJ 1 Reply Last reply
            0
            • D Dean21

              Hi, I am making a widget application in qt creator 9.0.1

              I have been stuck on this for a while now, I have previously had this library (https://github.com/KostiantynBushko/QMosqMqttClient) working on a linux computer so just tried to follow the same as I did before in the .pro file and what I put in my widget.cpp file.

              I have included the .h and .cpp file in the project as it says to do in the github instructions and included the compiler flag in my .pro file.

              And the mosquitto library is working when used by itself outside of qt

              The issue is that when I try to compile I get this error

              C:\Program Files\mosquitto\devel\mosquittopp.h:31: error: mosquitto.h: No such file or directory
              In file included from ..\Microscope_GUI\QMMqttClient.h:6,
                               from ..\Microscope_GUI\widget.cpp:12:
              C:/Program Files/mosquitto/devel/mosquittopp.h:31:10: fatal error: mosquitto.h: No such file or directory
                 31 | #include <mosquitto.h>
                    |          ^~~~~~~~~~~~~
              

              And the same error 2 more times for where it cant find the library.

              The mosquitto.h and mosquittopp.h are both part of the mosquitto mqtt library and are in the same directory, locate on my computer at C:\Program Files\mosquitto\devel

              The include error is saying that the mosquittopp.h file doesnt recognise mosquitto.h as a file even though they are in the same directory.

              I have tried included full path names in my widget.cpp, .pro file, the mosquittopp.h file and the mosquitto.h file but nothing seems to work.

              This is my .pro file

              QT       += core gui
              
              greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
              
              CONFIG += c++17
              
              QMAKE_CXXFLAGS += -lmosquitto
              
              INCLUDEPATH += C:/Program Files/mosquitto/devel
              
              LIBS += C:/Program Files/mosquitto/devel -lmosquittopp
              
              # You can make your code fail to compile if it uses deprecated APIs.
              # In order to do so, uncomment the following line.
              #DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
              
              SOURCES += \
                  QMMqttClient.cpp \
                  main.cpp \
                  widget.cpp \
              
              HEADERS += \
                  QMMqttClient.h \
                  widget.h
              
              FORMS += \
                  widget.ui
              
              # Default rules for deployment.
              qnx: target.path = /tmp/$${TARGET}/bin
              else: unix:!android: target.path = /opt/$${TARGET}/bin
              !isEmpty(target.path): INSTALLS += target
              

              This is my widget.cpp file

              #include "widget.h"
              #include "ui_widget.h"
              #include <QPalette>
              #include <QDebug>
              #include <QTimer>
              #include <QString>
              
              
              //-----for qt qrapper for mosquitto-----
              #include <QCoreApplication>
              #include <QTime>
              #include "QMMqttClient.h"
              //--------------------------------------
              
              Widget::Widget(QWidget *parent)
                  : QWidget(parent)
                  , ui(new Ui::Widget)
              {
                  ui->setupUi(this);
              }
              
              Widget::~Widget()
              {
                  delete ui;
              }
              

              All other files are unaltered from the library or are automatically generated when you make a widget application.

              Any help on what I could be doing wrong would be great as I am quite stuck on this.

              S Offline
              S Offline
              starkm42
              wrote on last edited by
              #8

              @Dean21 i am thinking this is because you forgot to add DEPENDPATH

              source: https://doc.qt.io/qt-6/qmake-variable-reference.html#dependpath

              Specifies a list of directories for qmake to scan, to resolve dependencies. This variable is used when qmake crawls through the header files that you #include in your source code.
              

              when using 3rd party libraries, this method is much more easy and less error prone. https://doc.qt.io/qtcreator/creator-project-qmake-libraries.html

              Qt modifies your qmake file for you.

              D 1 Reply Last reply
              0
              • D Dean21

                @Dean21 Yes I also fixed the libs part in the pro file with the quotes as well.
                So what can I do to try and get it to link, the kit used when I made this project says it is Desktop Qt 6.4.1 MinGW 64-bit for the compiler.

                Thanks for the help

                jsulmJ Offline
                jsulmJ Offline
                jsulm
                Lifetime Qt Champion
                wrote on last edited by
                #9

                @Dean21 I think on Windows you need to link differently (see https://doc.qt.io/qt-6/qmake-variable-reference.html#libs):

                unix:LIBS += -L/usr/local/lib -lmath
                win32:LIBS += c:/mylibs/math.lib
                

                So, you need to use a path to the *.lib file of the library.

                "the kit used when I made this project says it is Desktop Qt 6.4.1 MinGW 64-bit for the compiler" - the question is - what compiler was used to build that library? If MSVC was used it is not going to work. You need a MinGW build of the lib.

                https://forum.qt.io/topic/113070/qt-code-of-conduct

                D 1 Reply Last reply
                0
                • S starkm42

                  @Dean21 i am thinking this is because you forgot to add DEPENDPATH

                  source: https://doc.qt.io/qt-6/qmake-variable-reference.html#dependpath

                  Specifies a list of directories for qmake to scan, to resolve dependencies. This variable is used when qmake crawls through the header files that you #include in your source code.
                  

                  when using 3rd party libraries, this method is much more easy and less error prone. https://doc.qt.io/qtcreator/creator-project-qmake-libraries.html

                  Qt modifies your qmake file for you.

                  D Offline
                  D Offline
                  Dean21
                  wrote on last edited by
                  #10

                  @starkm42 Thanks for the reply, that seemed to work to remove a lot of the linking errors but not I get this one error I havent seen before

                  :-1: error: No rule to make target 'C:/Users/deanm/Desktop/Uni_Year_3/3rd_year_project/Microscope_GUI_V2/Microscope_GUI/../../../../../../../Program Files/mosquitto/devel/libmosquittoppd.a', needed by 'debug/Microscope_GUI.exe'. Stop.

                  jsulmJ 1 Reply Last reply
                  0
                  • D Dean21

                    @starkm42 Thanks for the reply, that seemed to work to remove a lot of the linking errors but not I get this one error I havent seen before

                    :-1: error: No rule to make target 'C:/Users/deanm/Desktop/Uni_Year_3/3rd_year_project/Microscope_GUI_V2/Microscope_GUI/../../../../../../../Program Files/mosquitto/devel/libmosquittoppd.a', needed by 'debug/Microscope_GUI.exe'. Stop.

                    jsulmJ Offline
                    jsulmJ Offline
                    jsulm
                    Lifetime Qt Champion
                    wrote on last edited by
                    #11

                    @Dean21 How does your pro file look like now?

                    https://forum.qt.io/topic/113070/qt-code-of-conduct

                    D 1 Reply Last reply
                    0
                    • jsulmJ jsulm

                      @Dean21 I think on Windows you need to link differently (see https://doc.qt.io/qt-6/qmake-variable-reference.html#libs):

                      unix:LIBS += -L/usr/local/lib -lmath
                      win32:LIBS += c:/mylibs/math.lib
                      

                      So, you need to use a path to the *.lib file of the library.

                      "the kit used when I made this project says it is Desktop Qt 6.4.1 MinGW 64-bit for the compiler" - the question is - what compiler was used to build that library? If MSVC was used it is not going to work. You need a MinGW build of the lib.

                      D Offline
                      D Offline
                      Dean21
                      wrote on last edited by
                      #12

                      @jsulm I am not sure what compiler was used to compile the library, but as I have had this working in Qt creator before on linux with the same library I assumed it would work fine on windows

                      S 1 Reply Last reply
                      0
                      • jsulmJ jsulm

                        @Dean21 How does your pro file look like now?

                        D Offline
                        D Offline
                        Dean21
                        wrote on last edited by
                        #13

                        @jsulm This is now my .pro file.

                        QT       += core gui
                        
                        greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
                        
                        CONFIG += c++17
                        
                        #QMAKE_CXXFLAGS += -lmosquitto
                        
                        #INCLUDEPATH += "C:/Program Files/mosquitto/devel"
                        
                        #LIBS += -L"C:/Program Files/mosquitto/devel" -lmosquittopp
                        
                        # You can make your code fail to compile if it uses deprecated APIs.
                        # In order to do so, uncomment the following line.
                        #DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
                        
                        SOURCES += \
                            QMMqttClient.cpp \
                            main.cpp \
                            widget.cpp \
                        
                        HEADERS += \
                            QMMqttClient.h \
                            widget.h
                        
                        FORMS += \
                            widget.ui
                        
                        # Default rules for deployment.
                        qnx: target.path = /tmp/$${TARGET}/bin
                        else: unix:!android: target.path = /opt/$${TARGET}/bin
                        !isEmpty(target.path): INSTALLS += target
                        
                        win32:CONFIG(release, debug|release): LIBS += -L$$PWD/'../../../../../../../Program Files/mosquitto/devel/' -lmosquittopp
                        else:win32:CONFIG(debug, debug|release): LIBS += -L$$PWD/'../../../../../../../Program Files/mosquitto/devel/' -lmosquittoppd
                        else:unix: LIBS += -L$$PWD/'../../../../../../../Program Files/mosquitto/devel/' -lmosquittopp
                        
                        INCLUDEPATH += $$PWD/'../../../../../../../Program Files/mosquitto/devel'
                        DEPENDPATH += $$PWD/'../../../../../../../Program Files/mosquitto/devel'
                        
                        win32-g++:CONFIG(release, debug|release): PRE_TARGETDEPS += $$PWD/'../../../../../../../Program Files/mosquitto/devel/libmosquittopp.a'
                        else:win32-g++:CONFIG(debug, debug|release): PRE_TARGETDEPS += $$PWD/'../../../../../../../Program Files/mosquitto/devel/libmosquittoppd.a'
                        else:win32:!win32-g++:CONFIG(release, debug|release): PRE_TARGETDEPS += $$PWD/'../../../../../../../Program Files/mosquitto/devel/mosquittopp.lib'
                        else:win32:!win32-g++:CONFIG(debug, debug|release): PRE_TARGETDEPS += $$PWD/'../../../../../../../Program Files/mosquitto/devel/mosquittoppd.lib'
                        else:unix: PRE_TARGETDEPS += $$PWD/'../../../../../../../Program Files/mosquitto/devel/libmosquittopp.a'
                        
                        
                        jsulmJ 1 Reply Last reply
                        0
                        • D Dean21

                          @jsulm This is now my .pro file.

                          QT       += core gui
                          
                          greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
                          
                          CONFIG += c++17
                          
                          #QMAKE_CXXFLAGS += -lmosquitto
                          
                          #INCLUDEPATH += "C:/Program Files/mosquitto/devel"
                          
                          #LIBS += -L"C:/Program Files/mosquitto/devel" -lmosquittopp
                          
                          # You can make your code fail to compile if it uses deprecated APIs.
                          # In order to do so, uncomment the following line.
                          #DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
                          
                          SOURCES += \
                              QMMqttClient.cpp \
                              main.cpp \
                              widget.cpp \
                          
                          HEADERS += \
                              QMMqttClient.h \
                              widget.h
                          
                          FORMS += \
                              widget.ui
                          
                          # Default rules for deployment.
                          qnx: target.path = /tmp/$${TARGET}/bin
                          else: unix:!android: target.path = /opt/$${TARGET}/bin
                          !isEmpty(target.path): INSTALLS += target
                          
                          win32:CONFIG(release, debug|release): LIBS += -L$$PWD/'../../../../../../../Program Files/mosquitto/devel/' -lmosquittopp
                          else:win32:CONFIG(debug, debug|release): LIBS += -L$$PWD/'../../../../../../../Program Files/mosquitto/devel/' -lmosquittoppd
                          else:unix: LIBS += -L$$PWD/'../../../../../../../Program Files/mosquitto/devel/' -lmosquittopp
                          
                          INCLUDEPATH += $$PWD/'../../../../../../../Program Files/mosquitto/devel'
                          DEPENDPATH += $$PWD/'../../../../../../../Program Files/mosquitto/devel'
                          
                          win32-g++:CONFIG(release, debug|release): PRE_TARGETDEPS += $$PWD/'../../../../../../../Program Files/mosquitto/devel/libmosquittopp.a'
                          else:win32-g++:CONFIG(debug, debug|release): PRE_TARGETDEPS += $$PWD/'../../../../../../../Program Files/mosquitto/devel/libmosquittoppd.a'
                          else:win32:!win32-g++:CONFIG(release, debug|release): PRE_TARGETDEPS += $$PWD/'../../../../../../../Program Files/mosquitto/devel/mosquittopp.lib'
                          else:win32:!win32-g++:CONFIG(debug, debug|release): PRE_TARGETDEPS += $$PWD/'../../../../../../../Program Files/mosquitto/devel/mosquittoppd.lib'
                          else:unix: PRE_TARGETDEPS += $$PWD/'../../../../../../../Program Files/mosquitto/devel/libmosquittopp.a'
                          
                          
                          jsulmJ Offline
                          jsulmJ Offline
                          jsulm
                          Lifetime Qt Champion
                          wrote on last edited by
                          #14

                          @Dean21 said in Including MQTT wrapper for mosquitto library on windows:

                          else:unix: PRE_TARGETDEPS += $$PWD/'../../../../../../../Program Files/mosquitto/devel/libmosquittopp.a'

                          Why do you have this?
                          Your LIBS for Windows are still wrong.

                          https://forum.qt.io/topic/113070/qt-code-of-conduct

                          D 1 Reply Last reply
                          0
                          • jsulmJ jsulm

                            @Dean21 said in Including MQTT wrapper for mosquitto library on windows:

                            else:unix: PRE_TARGETDEPS += $$PWD/'../../../../../../../Program Files/mosquitto/devel/libmosquittopp.a'

                            Why do you have this?
                            Your LIBS for Windows are still wrong.

                            D Offline
                            D Offline
                            Dean21
                            wrote on last edited by
                            #15

                            @jsulm Sorry forgot to untick linux and mac boxes, here is the .pro file, it still has the same error though.

                            QT       += core gui
                            
                            greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
                            
                            CONFIG += c++17
                            
                            QMAKE_CXXFLAGS += -lmosquitto
                            
                            INCLUDEPATH += "C:/Program Files/mosquitto/devel"
                            
                            LIBS += -L"C:/Program Files/mosquitto/devel" -lmosquittopp
                            
                            # You can make your code fail to compile if it uses deprecated APIs.
                            # In order to do so, uncomment the following line.
                            #DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
                            
                            SOURCES += \
                                QMMqttClient.cpp \
                                main.cpp \
                                widget.cpp \
                            
                            HEADERS += \
                                QMMqttClient.h \
                                widget.h
                            
                            FORMS += \
                                widget.ui
                            
                            # Default rules for deployment.
                            qnx: target.path = /tmp/$${TARGET}/bin
                            else: unix:!android: target.path = /opt/$${TARGET}/bin
                            !isEmpty(target.path): INSTALLS += target
                            
                            win32:CONFIG(release, debug|release): LIBS += -L$$PWD/'../../../../../../../Program Files/mosquitto/devel/' -lmosquittopp
                            else:win32:CONFIG(debug, debug|release): LIBS += -L$$PWD/'../../../../../../../Program Files/mosquitto/devel/' -lmosquittoppd
                            
                            INCLUDEPATH += $$PWD/'../../../../../../../Program Files/mosquitto/devel'
                            DEPENDPATH += $$PWD/'../../../../../../../Program Files/mosquitto/devel'
                            
                            win32-g++:CONFIG(release, debug|release): PRE_TARGETDEPS += $$PWD/'../../../../../../../Program Files/mosquitto/devel/libmosquittopp.a'
                            else:win32-g++:CONFIG(debug, debug|release): PRE_TARGETDEPS += $$PWD/'../../../../../../../Program Files/mosquitto/devel/libmosquittoppd.a'
                            else:win32:!win32-g++:CONFIG(release, debug|release): PRE_TARGETDEPS += $$PWD/'../../../../../../../Program Files/mosquitto/devel/mosquittopp.lib'
                            else:win32:!win32-g++:CONFIG(debug, debug|release): PRE_TARGETDEPS += $$PWD/'../../../../../../../Program Files/mosquitto/devel/mosquittoppd.lib'
                            
                            

                            Error: :-1: error: No rule to make target 'C:/Users/deanm/Desktop/Uni_Year_3/3rd_year_project/Microscope_GUI_V2/Microscope_GUI/../../../../../../../Program Files/mosquitto/devel/libmosquittoppd.a', needed by 'debug/Microscope_GUI.exe'. Stop.

                            jsulmJ 1 Reply Last reply
                            0
                            • D Dean21

                              @jsulm Sorry forgot to untick linux and mac boxes, here is the .pro file, it still has the same error though.

                              QT       += core gui
                              
                              greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
                              
                              CONFIG += c++17
                              
                              QMAKE_CXXFLAGS += -lmosquitto
                              
                              INCLUDEPATH += "C:/Program Files/mosquitto/devel"
                              
                              LIBS += -L"C:/Program Files/mosquitto/devel" -lmosquittopp
                              
                              # You can make your code fail to compile if it uses deprecated APIs.
                              # In order to do so, uncomment the following line.
                              #DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
                              
                              SOURCES += \
                                  QMMqttClient.cpp \
                                  main.cpp \
                                  widget.cpp \
                              
                              HEADERS += \
                                  QMMqttClient.h \
                                  widget.h
                              
                              FORMS += \
                                  widget.ui
                              
                              # Default rules for deployment.
                              qnx: target.path = /tmp/$${TARGET}/bin
                              else: unix:!android: target.path = /opt/$${TARGET}/bin
                              !isEmpty(target.path): INSTALLS += target
                              
                              win32:CONFIG(release, debug|release): LIBS += -L$$PWD/'../../../../../../../Program Files/mosquitto/devel/' -lmosquittopp
                              else:win32:CONFIG(debug, debug|release): LIBS += -L$$PWD/'../../../../../../../Program Files/mosquitto/devel/' -lmosquittoppd
                              
                              INCLUDEPATH += $$PWD/'../../../../../../../Program Files/mosquitto/devel'
                              DEPENDPATH += $$PWD/'../../../../../../../Program Files/mosquitto/devel'
                              
                              win32-g++:CONFIG(release, debug|release): PRE_TARGETDEPS += $$PWD/'../../../../../../../Program Files/mosquitto/devel/libmosquittopp.a'
                              else:win32-g++:CONFIG(debug, debug|release): PRE_TARGETDEPS += $$PWD/'../../../../../../../Program Files/mosquitto/devel/libmosquittoppd.a'
                              else:win32:!win32-g++:CONFIG(release, debug|release): PRE_TARGETDEPS += $$PWD/'../../../../../../../Program Files/mosquitto/devel/mosquittopp.lib'
                              else:win32:!win32-g++:CONFIG(debug, debug|release): PRE_TARGETDEPS += $$PWD/'../../../../../../../Program Files/mosquitto/devel/mosquittoppd.lib'
                              
                              

                              Error: :-1: error: No rule to make target 'C:/Users/deanm/Desktop/Uni_Year_3/3rd_year_project/Microscope_GUI_V2/Microscope_GUI/../../../../../../../Program Files/mosquitto/devel/libmosquittoppd.a', needed by 'debug/Microscope_GUI.exe'. Stop.

                              jsulmJ Offline
                              jsulmJ Offline
                              jsulm
                              Lifetime Qt Champion
                              wrote on last edited by
                              #16

                              @Dean21 said in Including MQTT wrapper for mosquitto library on windows:

                              QMAKE_CXXFLAGS += -lmosquitto

                              Why?

                              And again: your LIBS for Windows are wrong!

                              I also don't know why you have static versions if you want to link dynamically:

                              else:win32-g++:CONFIG(debug, debug|release): PRE_TARGETDEPS += $$PWD/'../../../../../../../Program Files/mosquitto/devel/libmosquittoppd.a'
                              

                              Remove alls these *.a stuff.

                              https://forum.qt.io/topic/113070/qt-code-of-conduct

                              D 1 Reply Last reply
                              0
                              • jsulmJ jsulm

                                @Dean21 said in Including MQTT wrapper for mosquitto library on windows:

                                QMAKE_CXXFLAGS += -lmosquitto

                                Why?

                                And again: your LIBS for Windows are wrong!

                                I also don't know why you have static versions if you want to link dynamically:

                                else:win32-g++:CONFIG(debug, debug|release): PRE_TARGETDEPS += $$PWD/'../../../../../../../Program Files/mosquitto/devel/libmosquittoppd.a'
                                

                                Remove alls these *.a stuff.

                                D Offline
                                D Offline
                                Dean21
                                wrote on last edited by
                                #17

                                @jsulm My bad, this was done with dynamic and this is what was generated in the .pro file now.

                                QT       += core gui
                                
                                greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
                                
                                CONFIG += c++17
                                
                                QMAKE_CXXFLAGS += -lmosquitto
                                
                                INCLUDEPATH += "C:/Program Files/mosquitto/devel"
                                
                                LIBS += -L"C:/Program Files/mosquitto/devel" -lmosquittopp
                                
                                # You can make your code fail to compile if it uses deprecated APIs.
                                # In order to do so, uncomment the following line.
                                #DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
                                
                                SOURCES += \
                                    QMMqttClient.cpp \
                                    main.cpp \
                                    widget.cpp \
                                
                                HEADERS += \
                                    QMMqttClient.h \
                                    widget.h
                                
                                FORMS += \
                                    widget.ui
                                
                                # Default rules for deployment.
                                qnx: target.path = /tmp/$${TARGET}/bin
                                else: unix:!android: target.path = /opt/$${TARGET}/bin
                                !isEmpty(target.path): INSTALLS += target
                                
                                win32:CONFIG(release, debug|release): LIBS += -L$$PWD/'../../../../../../../Program Files/mosquitto/devel/' -lmosquittopp
                                else:win32:CONFIG(debug, debug|release): LIBS += -L$$PWD/'../../../../../../../Program Files/mosquitto/devel/' -lmosquittoppd
                                
                                INCLUDEPATH += $$PWD/'../../../../../../../Program Files/mosquitto/devel'
                                DEPENDPATH += $$PWD/'../../../../../../../Program Files/mosquitto/devel'
                                
                                

                                This now gives these errors:

                                :-1: error: cannot find -lmosquittoppd
                                :-1: error: cannot find -lmosquittod
                                :-1: error: collect2.exe: error: ld returned 1 exit status

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                                • D Dean21

                                  @jsulm I am not sure what compiler was used to compile the library, but as I have had this working in Qt creator before on linux with the same library I assumed it would work fine on windows

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                                  starkm42
                                  wrote on last edited by starkm42
                                  #18

                                  @Dean21 wait are you using the same compiled library that you used for linux on windows without recompiling or getting new binaries compiled for windows ?

                                  @Dean21 said in Including MQTT wrapper for mosquitto library on windows:

                                  @jsulm I am not sure what compiler was used to compile the library, but as I have had this working in Qt creator before on linux with the same library I assumed it would work fine on windows

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                                  0
                                  • S starkm42

                                    @Dean21 wait are you using the same compiled library that you used for linux on windows without recompiling or getting new binaries compiled for windows ?

                                    @Dean21 said in Including MQTT wrapper for mosquitto library on windows:

                                    @jsulm I am not sure what compiler was used to compile the library, but as I have had this working in Qt creator before on linux with the same library I assumed it would work fine on windows

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                                    Dean21
                                    wrote on last edited by
                                    #19

                                    @starkm42 No, i just redownloaded the library from the website and set it up to start with to make sure it was working before i tried to use it in qt

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                                      Dean21
                                      wrote on last edited by
                                      #20

                                      I just re-added the library, but removed the tickbox for "add d suffix for debug", and that removes the errors about finding -mosquitoppd, but now I have all the same linker errors again.

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                                      0
                                      • D Dean21

                                        I just re-added the library, but removed the tickbox for "add d suffix for debug", and that removes the errors about finding -mosquitoppd, but now I have all the same linker errors again.

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                                        starkm42
                                        wrote on last edited by starkm42
                                        #21

                                        @Dean21

                                        for adding a test library called NemaTode, after following the guide https://doc.qt.io/qtcreator/creator-project-qmake-libraries.html

                                        this is what my qmake looks like

                                        QT       += core gui positioning
                                        
                                        greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
                                        
                                        CONFIG += c++17
                                        
                                        # You can make your code fail to compile if it uses deprecated APIs.
                                        # In order to do so, uncomment the following line.
                                        #DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
                                        
                                        SOURCES += \
                                            gpssource.cpp \
                                            main.cpp \
                                            mainwindow.cpp
                                        
                                        HEADERS += \
                                            gpssource.h \
                                            mainwindow.h
                                        
                                        # Default rules for deployment.
                                        qnx: target.path = /tmp/$${TARGET}/bin
                                        else: unix:!android: target.path = /opt/$${TARGET}/bin
                                        !isEmpty(target.path): INSTALLS += target
                                        
                                        win32:CONFIG(release, debug|release): LIBS += -L$$PWD/../../third_party_libs/NemaTode/lib/ -lNemaTode
                                        else:win32:CONFIG(debug, debug|release): LIBS += -L$$PWD/../../third_party_libs/NemaTode/lib/ -lNemaTode
                                        else:unix: LIBS += -L$$PWD/../../third_party_libs/NemaTode/lib/ -lNemaTode
                                        
                                        INCLUDEPATH += $$PWD/../../third_party_libs/NemaTode/include/nmeaparse
                                        DEPENDPATH += $$PWD/../../third_party_libs/NemaTode/include/nmeaparse
                                        
                                        FORMS += \
                                            GPSCordinatesDisplay.ui
                                        

                                        mine does not have LIB or INCLUDEPATH
                                        try removing all manual additions, just sticking to the guide would be my suggestion.

                                        D 1 Reply Last reply
                                        0
                                        • S starkm42

                                          @Dean21

                                          for adding a test library called NemaTode, after following the guide https://doc.qt.io/qtcreator/creator-project-qmake-libraries.html

                                          this is what my qmake looks like

                                          QT       += core gui positioning
                                          
                                          greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
                                          
                                          CONFIG += c++17
                                          
                                          # You can make your code fail to compile if it uses deprecated APIs.
                                          # In order to do so, uncomment the following line.
                                          #DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
                                          
                                          SOURCES += \
                                              gpssource.cpp \
                                              main.cpp \
                                              mainwindow.cpp
                                          
                                          HEADERS += \
                                              gpssource.h \
                                              mainwindow.h
                                          
                                          # Default rules for deployment.
                                          qnx: target.path = /tmp/$${TARGET}/bin
                                          else: unix:!android: target.path = /opt/$${TARGET}/bin
                                          !isEmpty(target.path): INSTALLS += target
                                          
                                          win32:CONFIG(release, debug|release): LIBS += -L$$PWD/../../third_party_libs/NemaTode/lib/ -lNemaTode
                                          else:win32:CONFIG(debug, debug|release): LIBS += -L$$PWD/../../third_party_libs/NemaTode/lib/ -lNemaTode
                                          else:unix: LIBS += -L$$PWD/../../third_party_libs/NemaTode/lib/ -lNemaTode
                                          
                                          INCLUDEPATH += $$PWD/../../third_party_libs/NemaTode/include/nmeaparse
                                          DEPENDPATH += $$PWD/../../third_party_libs/NemaTode/include/nmeaparse
                                          
                                          FORMS += \
                                              GPSCordinatesDisplay.ui
                                          

                                          mine does not have LIB or INCLUDEPATH
                                          try removing all manual additions, just sticking to the guide would be my suggestion.

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                                          Dean21
                                          wrote on last edited by
                                          #22

                                          @starkm42 Thanks for the reply, the issue was to do with the fact mosquitto was compiled with a different library. To avoid this I am just going to run a ubuntu VM Thanks everyone for the help.

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