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how to add library(qmqtt.h) in qmqtt client for windows

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  • jsulmJ jsulm

    @shravani It looks like you're clicking on Run not on Build. Since mqtt is a lib you cannot execute it. And again: can you post the build log?

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    shravani
    wrote on last edited by shravani
    #15

    @jsulm
    sorry ,i can only post what i got after building in build folder.0_1498628025184_build_image.PNG!0_1498628076971_build.PNG

    jsulmJ raven-worxR 2 Replies Last reply
    0
    • S shravani

      @jsulm
      sorry ,i can only post what i got after building in build folder.0_1498628025184_build_image.PNG!0_1498628076971_build.PNG

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

      @shravani Why can't you post the build log? You have it in QtCreator. The screen-shots you posted do not help.

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

      1 Reply Last reply
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      • S shravani

        @jsulm
        sorry ,i can only post what i got after building in build folder.0_1498628025184_build_image.PNG!0_1498628076971_build.PNG

        raven-worxR Offline
        raven-worxR Offline
        raven-worx
        Moderators
        wrote on last edited by
        #17

        @shravani
        got the folder where you donwloaded qmqtt (where the qmqtt.pro resides) and and execute the following:

        1. qmake
        2. nmake (for Visual Studio compiler) or mingw32-make (for mingw)

        thats it. No QtCreator needed.
        Then the .dll and corresponding .lib (MSVC) or .a (mingw32) file will be created in the output folder.

        --- SUPPORT REQUESTS VIA CHAT WILL BE IGNORED ---
        If you have a question please use the forum so others can benefit from the solution in the future

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        • raven-worxR raven-worx

          @shravani
          got the folder where you donwloaded qmqtt (where the qmqtt.pro resides) and and execute the following:

          1. qmake
          2. nmake (for Visual Studio compiler) or mingw32-make (for mingw)

          thats it. No QtCreator needed.
          Then the .dll and corresponding .lib (MSVC) or .a (mingw32) file will be created in the output folder.

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          shravani
          wrote on last edited by shravani
          #18

          @raven-worx
          thank you,
          im new to qt could you please tell me how to execute qmake and mingw32-make in windows?

          raven-worxR 1 Reply Last reply
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          • S shravani

            @raven-worx
            thank you,
            im new to qt could you please tell me how to execute qmake and mingw32-make in windows?

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            raven-worxR Offline
            raven-worx
            Moderators
            wrote on last edited by raven-worx
            #19

            @shravani
            open a console window and execute "qmake" let it finished and afterwards execute one of the two (the correct one corresponding to your used compiler!) make commands for building.

            Make sure that the executable can be found by the system (add the paths to the PATH environment variable)
            But those a pretty basics. Probably you should go on reading some learning material first before trying to build a software which is based on a 3rd party library.

            --- SUPPORT REQUESTS VIA CHAT WILL BE IGNORED ---
            If you have a question please use the forum so others can benefit from the solution in the future

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            • raven-worxR raven-worx

              @shravani
              open a console window and execute "qmake" let it finished and afterwards execute one of the two (the correct one corresponding to your used compiler!) make commands for building.

              Make sure that the executable can be found by the system (add the paths to the PATH environment variable)
              But those a pretty basics. Probably you should go on reading some learning material first before trying to build a software which is based on a 3rd party library.

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              shravani
              wrote on last edited by shravani
              #20

              @raven-worx
              can u give any link to read? and where .lib will be created? in same folder?

              raven-worxR 1 Reply Last reply
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              • S shravani

                @raven-worx
                can u give any link to read? and where .lib will be created? in same folder?

                raven-worxR Offline
                raven-worxR Offline
                raven-worx
                Moderators
                wrote on last edited by
                #21

                @shravani
                Getting started.
                Probably you should consider buying a book about Qt also

                --- SUPPORT REQUESTS VIA CHAT WILL BE IGNORED ---
                If you have a question please use the forum so others can benefit from the solution in the future

                S 1 Reply Last reply
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                • raven-worxR raven-worx

                  @shravani
                  Getting started.
                  Probably you should consider buying a book about Qt also

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                  shravani
                  wrote on last edited by
                  #22

                  @raven-worx
                  but using qtcreator also, run qmake is possible right?why am i not getting .lib file file?can you see screenshots of my debug folder (above)after building.

                  raven-worxR 1 Reply Last reply
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                  • S shravani

                    @raven-worx
                    but using qtcreator also, run qmake is possible right?why am i not getting .lib file file?can you see screenshots of my debug folder (above)after building.

                    raven-worxR Offline
                    raven-worxR Offline
                    raven-worx
                    Moderators
                    wrote on last edited by
                    #23

                    @shravani
                    yes, but especially when you are not completley sure what you are doing there are some pitfalls.
                    You can try to build using QtCreator, but then do not press the Run/Debug button, but the Build button below.

                    --- SUPPORT REQUESTS VIA CHAT WILL BE IGNORED ---
                    If you have a question please use the forum so others can benefit from the solution in the future

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                    • raven-worxR raven-worx

                      @shravani
                      yes, but especially when you are not completley sure what you are doing there are some pitfalls.
                      You can try to build using QtCreator, but then do not press the Run/Debug button, but the Build button below.

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                      shravani
                      wrote on last edited by shravani
                      #24

                      @raven-worx
                      hi,
                      after building i came to know qmqtt.lib was created(5th line from last).but i could not find it inorder to add that path to .pro file.can u please tell by default where it will be stored? in build/debug also it is not present(see above post).

                      thank you

                      0_1498707021202_build_log.PNG

                      raven-worxR 1 Reply Last reply
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                      • dheerendraD Offline
                        dheerendraD Offline
                        dheerendra
                        Qt Champions 2022
                        wrote on last edited by
                        #25

                        Most easiest way is to hit windows search button, search that file and find that directory. Specify this directory in pro file.

                        Dheerendra
                        @Community Service
                        Certified Qt Specialist
                        http://www.pthinks.com

                        1 Reply Last reply
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                        • S shravani

                          @raven-worx
                          hi,
                          after building i came to know qmqtt.lib was created(5th line from last).but i could not find it inorder to add that path to .pro file.can u please tell by default where it will be stored? in build/debug also it is not present(see above post).

                          thank you

                          0_1498707021202_build_log.PNG

                          raven-worxR Offline
                          raven-worxR Offline
                          raven-worx
                          Moderators
                          wrote on last edited by
                          #26

                          @shravani
                          according to this log in the \bin directory.

                          --- SUPPORT REQUESTS VIA CHAT WILL BE IGNORED ---
                          If you have a question please use the forum so others can benefit from the solution in the future

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                          • raven-worxR raven-worx

                            @shravani
                            according to this log in the \bin directory.

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                            shravani
                            wrote on last edited by shravani
                            #27

                            @raven-worx
                            thank you very much. now i added that .lib file to .pro file and build all is successful.but as the program start executing im getting this error while debugging.can u please look into it?
                            i dont understand which dll file is missing and where to add it?

                            0_1498793774462_Capture.PNG

                            jsulmJ 1 Reply Last reply
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                            • S shravani

                              @raven-worx
                              thank you very much. now i added that .lib file to .pro file and build all is successful.but as the program start executing im getting this error while debugging.can u please look into it?
                              i dont understand which dll file is missing and where to add it?

                              0_1498793774462_Capture.PNG

                              jsulmJ Offline
                              jsulmJ Offline
                              jsulm
                              Lifetime Qt Champion
                              wrote on last edited by
                              #28

                              @shravani How do you start the app? From QtCreator?
                              On Windows you can use http://www.dependencywalker.com/ to find out which libraries an application needs.
                              If you want to start your app outside of QtCreator then you first need to deploy it: http://doc.qt.io/qt-5/windows-deployment.html

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

                              S 1 Reply Last reply
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                              • jsulmJ jsulm

                                @shravani How do you start the app? From QtCreator?
                                On Windows you can use http://www.dependencywalker.com/ to find out which libraries an application needs.
                                If you want to start your app outside of QtCreator then you first need to deploy it: http://doc.qt.io/qt-5/windows-deployment.html

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                                shravani
                                wrote on last edited by
                                #29

                                @jsulm

                                im running it in qtcreator, not outside.inside qt also do i need to include?

                                jsulmJ 1 Reply Last reply
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                                • S shravani

                                  @jsulm

                                  im running it in qtcreator, not outside.inside qt also do i need to include?

                                  jsulmJ Offline
                                  jsulmJ Offline
                                  jsulm
                                  Lifetime Qt Champion
                                  wrote on last edited by
                                  #30

                                  @shravani In QtCreator it should work. Use http://www.dependencywalker.com to see what is missing.
                                  Besides the lib file - do you have the DLL? Lib file is needed for linking, but DLL is needed at runtime.
                                  Also can you show how you added the lib to pro file?

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

                                  S 1 Reply Last reply
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                                  • jsulmJ jsulm

                                    @shravani In QtCreator it should work. Use http://www.dependencywalker.com to see what is missing.
                                    Besides the lib file - do you have the DLL? Lib file is needed for linking, but DLL is needed at runtime.
                                    Also can you show how you added the lib to pro file?

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                                    shravani
                                    wrote on last edited by
                                    #31

                                    @jsulm
                                    in this src/ qmqtt.h,.. and .lib files are there.so added that path.

                                    INCLUDEPATH += C:\Qt\qmqtt-master\src
                                    LIBS += -LC:\Qt\qmqtt-master\src -lqmqtt

                                    jsulmJ 1 Reply Last reply
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                                    • S shravani

                                      @jsulm
                                      in this src/ qmqtt.h,.. and .lib files are there.so added that path.

                                      INCLUDEPATH += C:\Qt\qmqtt-master\src
                                      LIBS += -LC:\Qt\qmqtt-master\src -lqmqtt

                                      jsulmJ Offline
                                      jsulmJ Offline
                                      jsulm
                                      Lifetime Qt Champion
                                      wrote on last edited by
                                      #32

                                      @shravani
                                      Again: you need the DLL file to be able to execute your app. Where is qmqtt.dll (or libqmqtt.dll)?

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

                                      S 1 Reply Last reply
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                                      • jsulmJ jsulm

                                        @shravani
                                        Again: you need the DLL file to be able to execute your app. Where is qmqtt.dll (or libqmqtt.dll)?

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                                        shravani
                                        wrote on last edited by shravani
                                        #33

                                        @jsulm
                                        it is inside src only.do i need to add anywhere else again?
                                        after building library it created in /bin so i copied from there to src folder

                                        jsulmJ 1 Reply Last reply
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                                        • S shravani

                                          @jsulm
                                          it is inside src only.do i need to add anywhere else again?
                                          after building library it created in /bin so i copied from there to src folder

                                          jsulmJ Offline
                                          jsulmJ Offline
                                          jsulm
                                          Lifetime Qt Champion
                                          wrote on last edited by
                                          #34

                                          @shravani The DLL must be in a directory where the operating system is looking for shared libraries when loading an app. Fastest way is to copy it to the build directory of your app (where your executable is).

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

                                          S 2 Replies Last reply
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