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How to embed DLL file in one executable file ?

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  • N Offline
    N Offline
    neel2818
    wrote on last edited by
    #1

    Hi All,

    I have three DLL files that my project depends on and after successful compilation i get one executable file but when i double click on that executable file in debug folder that tells us to copy QtCored4.dll,and other DLL file in debug folder so is there any way i can embed DLL in executable file ? so Every time i need not copy DLL in every folder.

    Thanks,
    Neel

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    • F Offline
      F Offline
      Franzk
      wrote on last edited by
      #2

      You cannot embed dlls in your program. If you have the sources of the libraries you can create a static library. In any case, you can add the Qt binary dir to your PATH, thereby removing the need to copy the libraries every time.

      "Horse sense is the thing a horse has which keeps it from betting on people." -- W.C. Fields

      http://www.catb.org/~esr/faqs/smart-questions.html

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      • N Offline
        N Offline
        neel2818
        wrote on last edited by
        #3

        That is right i agree with you.
        But if i want to send exe to another person and that person has not installed Qt in his machine then what should be the solution ?
        I want to send ONLY exe to another person so when he/she double click on exe then in that folder temporory DLL is extract and execute the exe.

        Thanks,
        Neel

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        • F Offline
          F Offline
          Franzk
          wrote on last edited by
          #4

          Build the static library or take the steps necessary to add the dll copy step to your build process. Note that you shouldn't distribute debug builds, as the debug run-time may not be present on the receiving system.

          "Horse sense is the thing a horse has which keeps it from betting on people." -- W.C. Fields

          http://www.catb.org/~esr/faqs/smart-questions.html

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          • ZlatomirZ Offline
            ZlatomirZ Offline
            Zlatomir
            wrote on last edited by
            #5

            You can use and installer (like "nsis":http://nsis.sourceforge.net/Main_Page) and use this to share your application with all the .dll files.

            https://forum.qt.io/category/41/romanian

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            • N Offline
              N Offline
              neel2818
              wrote on last edited by
              #6

              Not able to understand.
              can u please give me proper steps . I am using visual studio.
              I have tried to build Qt project as static but after that exe also want DLL file

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              • ZlatomirZ Offline
                ZlatomirZ Offline
                Zlatomir
                wrote on last edited by
                #7

                Before you can static build your application (so that it doesn't require dll) you need to static build the Qt framework (because as Franzk said you can't embed the dll into your exe) - you need the static libraries built before you can build a static exe. "here":http://doc.qt.nokia.com/latest/deployment-windows.html is a documentation link about the windows deployment (contains information about static build too)

                https://forum.qt.io/category/41/romanian

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                • H Offline
                  H Offline
                  hirakjyoti
                  wrote on last edited by
                  #8

                  Instead of double clicking on the executable file you can open Qt Command Prompt (if Windows) , then in the Qt Command Prompt go to debug folder & type your executable file name...

                  Hirakjyoti Sarma

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                  • G Offline
                    G Offline
                    giesbert
                    wrote on last edited by
                    #9

                    to link Qt statically, you have to rebuild Qt completly from the sources.
                    There are descriptions on the Devnet wiki and the Qt docs about how to do that.

                    Thats the only way to get one executable without dependencies. But building Qt takes some hours.

                    First you have to download the Qt sources zip file from "here":http://qt.nokia.com/downloads . In the text, there is a link behind the word zip :-)

                    Nokia Certified Qt Specialist.
                    Programming Is Like Sex: One mistake and you have to support it for the rest of your life. (Michael Sinz)

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                    • G Offline
                      G Offline
                      goetz
                      wrote on last edited by
                      #10

                      I do not recommend static linking. It has some disadvantages and hassles to setup. And - depending on the tool chain you use - it may not be sufficient at all, as you will have to deliver additional DLLs (eg. openssl or the like).

                      Instead, create an installer for Windows, NSIS was mentioned earlier, I can reommend "Inno Setup":http://www.jrsoftware.org/isinfo.php (install the QuickStart Pack). Setting up an installer with Inno Setup is very easy.

                      http://www.catb.org/~esr/faqs/smart-questions.html

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                      • T Offline
                        T Offline
                        tobias.hunger
                        wrote on last edited by
                        #11

                        In addition static linking will limit your licensing options. Please review your license terms before deciding on static linking.

                        From my understanding you will either need a commercial license of Qt or put your application under GPL if you do static linking against Qt. But then I am not a lawyer: Please consult yours and do not follow random legal advise found on the internet:-)

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                        • M Offline
                          M Offline
                          Mike_Really
                          wrote on last edited by
                          #12

                          Anyway, if you want to embed dll, it is actually possible. The type of these solutions are application virtualization tools. E.g. "boxedapp":http://boxedapp.com provides such function.

                          Of course, it's clear that you must follow licensing restrictions if any.

                          Hope it helps.

                          Mike.

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