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

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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

      S Offline
      S Offline
      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

        S 1 Reply Last reply
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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

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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
                0
                • 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 Online
                  jsulmJ Online
                  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 Online
                      jsulmJ Online
                      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 Online
                          jsulmJ Online
                          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 Online
                              jsulmJ Online
                              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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                              • jsulmJ jsulm

                                @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).

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                                shravani
                                wrote on last edited by
                                #35
                                This post is deleted!
                                1 Reply Last reply
                                1
                                • jsulmJ jsulm

                                  @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).

                                  S Offline
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                                  shravani
                                  wrote on last edited by
                                  #36

                                  @jsulm
                                  i added all dlls but now getting this error
                                  0_1498976658348_error.png

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                                  • SGaistS Offline
                                    SGaistS Offline
                                    SGaist
                                    Lifetime Qt Champion
                                    wrote on last edited by
                                    #37

                                    Hi,

                                    You can't start an application like that from explorer, you first have to follow the same steps you would before deploying your application on another computer.

                                    Interested in AI ? www.idiap.ch
                                    Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                                    S 1 Reply Last reply
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                                    • SGaistS SGaist

                                      Hi,

                                      You can't start an application like that from explorer, you first have to follow the same steps you would before deploying your application on another computer.

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                                      shravani
                                      wrote on last edited by shravani
                                      #38

                                      @SGaist
                                      In Qt creator also I'm getting same error after adding ucrtbased.dll to debug folder.
                                      i tried executing examples given in qt but getting same error.
                                      recently i installed this qt 5.8.1 msvc2015 new version because in qt 5.0 it(mqtt) is not working.

                                      0_1499045791448_error2.png 0_1499045799223_path.png

                                      jsulmJ 1 Reply Last reply
                                      0
                                      • S shravani

                                        @SGaist
                                        In Qt creator also I'm getting same error after adding ucrtbased.dll to debug folder.
                                        i tried executing examples given in qt but getting same error.
                                        recently i installed this qt 5.8.1 msvc2015 new version because in qt 5.0 it(mqtt) is not working.

                                        0_1499045791448_error2.png 0_1499045799223_path.png

                                        jsulmJ Online
                                        jsulmJ Online
                                        jsulm
                                        Lifetime Qt Champion
                                        wrote on last edited by
                                        #39

                                        @shravani Which DLLs exactly did you copy and from where? No need to copy ucrtbased.dll when starting from QtCreator.

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

                                        S 1 Reply Last reply
                                        0
                                        • jsulmJ jsulm

                                          @shravani Which DLLs exactly did you copy and from where? No need to copy ucrtbased.dll when starting from QtCreator.

                                          S Offline
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                                          shravani
                                          wrote on last edited by shravani
                                          #40

                                          @jsulm
                                          but while running it showed ucrtbased.dll is missing)DLL not found as above post)

                                          jsulmJ 1 Reply Last reply
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