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undefined reference to `_imp___ZN8mongocxx7v_noabi8instanceC1Ev in Qt?

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qt5c++11mongodbc++ qt
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  • V Vivek_A
    19 Aug 2021, 07:04

    @jsulm

    LIBS += C:/mongo-cxx-driver/lib/llibbsoncxx.dll
    
    INCLUDEPATH += C:/mongo-cxx-driver/include/mongocxx/v_noabi
    DEPENDPATH += C:/mongo-cxx-driver/include/mongocxx/v_noabi
    
    

    Output:

    g++: error: C:\mongo-cxx-driver\lib\llibbsoncxx.dll: No such file or directory
    Makefile.Release:233: recipe for target 'release\RTLSController.exe' failed
    
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    JonB
    wrote on 19 Aug 2021, 07:09 last edited by JonB
    #7

    @Vivek_A said in undefined reference to `_imp___ZN8mongocxx7v_noabi8instanceC1Ev in Qt?:

    g++: error: C:\mongo-cxx-driver\lib\llibbsoncxx.dll: No such file or directory

    Originally you had -llibbsoncxx.dll. I am thinking the leading -l was an argument to the linker, followed by the DLL file name? Which would make it LIBS += C:/mongo-cxx-driver/lib/libbsoncxx.dll (only one l)?

    However, this is a separate matter from whether you should be specifying a .dll here, I thought you would need either a .lib (MSVC) or a .a (MinGW)...?

    J 1 Reply Last reply 19 Aug 2021, 07:11
    1
    • J JonB
      19 Aug 2021, 07:09

      @Vivek_A said in undefined reference to `_imp___ZN8mongocxx7v_noabi8instanceC1Ev in Qt?:

      g++: error: C:\mongo-cxx-driver\lib\llibbsoncxx.dll: No such file or directory

      Originally you had -llibbsoncxx.dll. I am thinking the leading -l was an argument to the linker, followed by the DLL file name? Which would make it LIBS += C:/mongo-cxx-driver/lib/libbsoncxx.dll (only one l)?

      However, this is a separate matter from whether you should be specifying a .dll here, I thought you would need either a .lib (MSVC) or a .a (MinGW)...?

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      jsulm
      Lifetime Qt Champion
      wrote on 19 Aug 2021, 07:11 last edited by
      #8

      @JonB I wanted the OP to find that out :-) This is something a developer should do first before asking in a forum. Really basic stuff.

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

      J 1 Reply Last reply 19 Aug 2021, 07:13
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      • J jsulm
        19 Aug 2021, 07:11

        @JonB I wanted the OP to find that out :-) This is something a developer should do first before asking in a forum. Really basic stuff.

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        JonB
        wrote on 19 Aug 2021, 07:13 last edited by JonB
        #9

        @jsulm
        Whoops, sorry for treading on your toes!

        However I have amended my answer above since you saw it. Is one supposed to specify any DLL file in LIBS += ...?

        J 1 Reply Last reply 19 Aug 2021, 07:14
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        • J JonB
          19 Aug 2021, 07:13

          @jsulm
          Whoops, sorry for treading on your toes!

          However I have amended my answer above since you saw it. Is one supposed to specify any DLL file in LIBS += ...?

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          jsulm
          Lifetime Qt Champion
          wrote on 19 Aug 2021, 07:14 last edited by
          #10

          @JonB It should be .lib, yes. But OP claims there is no .lib file, but I'm not a Windows developer.

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

          J V 2 Replies Last reply 19 Aug 2021, 07:23
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          • J jsulm
            19 Aug 2021, 07:14

            @JonB It should be .lib, yes. But OP claims there is no .lib file, but I'm not a Windows developer.

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            JonB
            wrote on 19 Aug 2021, 07:23 last edited by
            #11

            @jsulm
            A .lib will not do him, as he is using MinGW/gcc. I now see he wrote earlier:

            full file is llibmongocxx.dll.a

            That is an unusual naming convention! If that is really the case, and applies to llibbsoncxx.dll.a too, then it would indeed seem to be as he wrote. But the error message

            g++: error: C:\mongo-cxx-driver\lib\llibbsoncxx.dll: No such file or directory
            

            shows what MinGW seems actually to be looking for, no mention of a .a suffix. So I'm not sure what is going on....

            1 Reply Last reply
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            • J jsulm
              19 Aug 2021, 07:14

              @JonB It should be .lib, yes. But OP claims there is no .lib file, but I'm not a Windows developer.

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              Vivek_A
              wrote on 19 Aug 2021, 07:23 last edited by Vivek_A
              #12

              @jsulm ok, i understand idid this

              LIBS += C:/mongo-cxx-driver/lib/libbsoncxx.dll.a
              
              INCLUDEPATH += C:/mongo-cxx-driver/include/mongocxx/v_noabi
              DEPENDPATH += C:/mongo-cxx-driver/include/mongocxx/v_noabi
              

              included but error that said first remains

              ./release\main.o:main.cpp:(.text+0x1d): undefined reference to `_imp___ZN8mongocxx7v_noabi8instanceC1Ev'
              ./release\main.o:main.cpp:(.text+0xee): undefined reference to `_imp___ZN8mongocxx7v_noabi8instanceD1Ev'
              ./release\main.o:main.cpp:(.text+0x14e): undefined reference to `_imp___ZN8mongocxx7v_noabi8instanceD1Ev'
              

              if you dont know about windows side of this , then its ok.
              @JonB i have doubt , the compiler is mingw 32 and i build the mongdb in mingw 64 is this makes any issues

              J J 2 Replies Last reply 19 Aug 2021, 07:25
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              • V Vivek_A
                19 Aug 2021, 07:23

                @jsulm ok, i understand idid this

                LIBS += C:/mongo-cxx-driver/lib/libbsoncxx.dll.a
                
                INCLUDEPATH += C:/mongo-cxx-driver/include/mongocxx/v_noabi
                DEPENDPATH += C:/mongo-cxx-driver/include/mongocxx/v_noabi
                

                included but error that said first remains

                ./release\main.o:main.cpp:(.text+0x1d): undefined reference to `_imp___ZN8mongocxx7v_noabi8instanceC1Ev'
                ./release\main.o:main.cpp:(.text+0xee): undefined reference to `_imp___ZN8mongocxx7v_noabi8instanceD1Ev'
                ./release\main.o:main.cpp:(.text+0x14e): undefined reference to `_imp___ZN8mongocxx7v_noabi8instanceD1Ev'
                

                if you dont know about windows side of this , then its ok.
                @JonB i have doubt , the compiler is mingw 32 and i build the mongdb in mingw 64 is this makes any issues

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                jsulm
                Lifetime Qt Champion
                wrote on 19 Aug 2021, 07:25 last edited by
                #13

                @Vivek_A You need to link at least one more lib containing the missing symbols (libmongocxx I guess).

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

                1 Reply Last reply
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                • V Vivek_A
                  19 Aug 2021, 07:23

                  @jsulm ok, i understand idid this

                  LIBS += C:/mongo-cxx-driver/lib/libbsoncxx.dll.a
                  
                  INCLUDEPATH += C:/mongo-cxx-driver/include/mongocxx/v_noabi
                  DEPENDPATH += C:/mongo-cxx-driver/include/mongocxx/v_noabi
                  

                  included but error that said first remains

                  ./release\main.o:main.cpp:(.text+0x1d): undefined reference to `_imp___ZN8mongocxx7v_noabi8instanceC1Ev'
                  ./release\main.o:main.cpp:(.text+0xee): undefined reference to `_imp___ZN8mongocxx7v_noabi8instanceD1Ev'
                  ./release\main.o:main.cpp:(.text+0x14e): undefined reference to `_imp___ZN8mongocxx7v_noabi8instanceD1Ev'
                  

                  if you dont know about windows side of this , then its ok.
                  @JonB i have doubt , the compiler is mingw 32 and i build the mongdb in mingw 64 is this makes any issues

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                  JonB
                  wrote on 19 Aug 2021, 07:28 last edited by JonB
                  #14

                  @Vivek_A said in undefined reference to `_imp___ZN8mongocxx7v_noabi8instanceC1Ev in Qt?:

                  LIBS += C:/mongo-cxx-driver/lib/libbsoncxx.dll.a

                  This looks much more reasonable than before!

                  Now as @jsulm says it looks like you need some further similars for other library files required to link successfully.

                  @JonB i have doubt , the compiler is mingw 32 and i build the mongdb in mingw 64 is this makes any issues

                  I am not sure what you are saying. It will not be possible to mix 64-bit-compiled code with 32-bit-compiled code in one executable. The compiler's bit-ness is not at issue, rather only whichever bit-ness it is generating code for.

                  Start by trying what @jsulm has pointed out, then deal with bit-ness if there is still an error.....

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                  • V Offline
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                    Vivek_A
                    wrote on 19 Aug 2021, 09:20 last edited by
                    #15

                    @JonB modified

                    LIBS += C:/mongo-cxx-driver/lib/libbsoncxx.dll.a
                    LIBS += C:/mongo-cxx-driver/lib/libmongocxx.dll.a
                    INCLUDEPATH += C:/mongo-cxx-driver/include/mongocxx/v_noabi
                    DEPENDPATH += C:/mongo-cxx-driver/include/mongocxx/v_noabi
                    
                    INCLUDEPATH += C:/mongo-cxx-driver/include/bsoncxx/v_noabi
                    DEPENDPATH += C:/mongo-cxx-driver/include/bsoncxx/v_noabi
                    

                    clean & rebuilded
                    Output:

                    ./release\main.o:main.cpp:(.text+0x19): undefined reference to `_imp___ZN8mongocxx7v_noabi8instanceC1Ev'
                    ./release\main.o:main.cpp:(.text+0x23): undefined reference to `_imp___ZN8mongocxx7v_noabi8instanceD1Ev'
                    collect2.exe: error: ld returned 1 exit status
                    
                    V 1 Reply Last reply 19 Aug 2021, 12:01
                    0
                    • V Vivek_A
                      19 Aug 2021, 09:20

                      @JonB modified

                      LIBS += C:/mongo-cxx-driver/lib/libbsoncxx.dll.a
                      LIBS += C:/mongo-cxx-driver/lib/libmongocxx.dll.a
                      INCLUDEPATH += C:/mongo-cxx-driver/include/mongocxx/v_noabi
                      DEPENDPATH += C:/mongo-cxx-driver/include/mongocxx/v_noabi
                      
                      INCLUDEPATH += C:/mongo-cxx-driver/include/bsoncxx/v_noabi
                      DEPENDPATH += C:/mongo-cxx-driver/include/bsoncxx/v_noabi
                      

                      clean & rebuilded
                      Output:

                      ./release\main.o:main.cpp:(.text+0x19): undefined reference to `_imp___ZN8mongocxx7v_noabi8instanceC1Ev'
                      ./release\main.o:main.cpp:(.text+0x23): undefined reference to `_imp___ZN8mongocxx7v_noabi8instanceD1Ev'
                      collect2.exe: error: ld returned 1 exit status
                      
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                      Vivek_A
                      wrote on 19 Aug 2021, 12:01 last edited by
                      #16

                      @Vivek_A anybody help...is that compiler problem

                      ./debug\main.o: In function `Z5qMainiPPc':
                      E:/vivek/dw_tdoa_controller7/dw_tdoa_controller/main.cpp:36: undefined reference to `_imp___ZN8mongocxx7v_noabi8instanceC1Ev'
                      E:/vivek/dw_tdoa_controller7/dw_tdoa_controller/main.cpp:36: undefined reference to `_imp___ZN8mongocxx7v_noabi8instanceD1Ev'
                      E:/vivek/dw_tdoa_controller7/dw_tdoa_controller/main.cpp:36: undefined reference to `_imp___ZN8mongocxx7v_noabi8instanceD1Ev'
                      collect2.exe: error: ld returned 1 exit status
                      
                      
                      Makefile:36: recipe for target 'debug' failed
                      mingw32-make[1]: *** [debug\RTLSController.exe] Error 1
                      mingw32-make: *** [debug] Error 2
                      17:25:51: The process "C:\Qt\Qt5.11.2\Tools\mingw530_32\bin\mingw32-make.exe" exited with code 2.
                      Error while building/deploying project dw_controller (kit: Desktop Qt 5.11.2 MinGW 32bit)
                      When executing step "Make"
                      
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                        SGaist
                        Lifetime Qt Champion
                        wrote on 19 Aug 2021, 18:54 last edited by
                        #17

                        Try inverting the order of the libraries you are linking.

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

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                          Vivek_A
                          wrote on 23 Aug 2021, 11:33 last edited by Vivek_A
                          #18

                          @SGaist tried , still same error , i think its not in the linking of lib, may be the installation or compiler problem... what u think???

                          M 1 Reply Last reply 23 Aug 2021, 11:42
                          0
                          • V Vivek_A
                            23 Aug 2021, 11:33

                            @SGaist tried , still same error , i think its not in the linking of lib, may be the installation or compiler problem... what u think???

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                            mrjj
                            Lifetime Qt Champion
                            wrote on 23 Aug 2021, 11:42 last edited by
                            #19

                            @Vivek_A

                            Hi
                            I saw this line
                            building/deploying project dw_controller (kit: Desktop Qt 5.11.2 MinGW 32bit)

                            but you said " its build using mingw64 "

                            So are your 32 bit app trying to load 64 bit DLL ?

                            V 1 Reply Last reply 23 Aug 2021, 12:40
                            0
                            • M mrjj
                              23 Aug 2021, 11:42

                              @Vivek_A

                              Hi
                              I saw this line
                              building/deploying project dw_controller (kit: Desktop Qt 5.11.2 MinGW 32bit)

                              but you said " its build using mingw64 "

                              So are your 32 bit app trying to load 64 bit DLL ?

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                              Vivek_A
                              wrote on 23 Aug 2021, 12:40 last edited by
                              #20

                              @mrjj hi sir, i build and installed mongocxx driver using ming64. The app running in Qt is Desktop Qt 5.11.2 MinGW 32bit, ie a mingw 32 bit compiler
                              32cea6be-46de-4793-820b-4fc7a9d94cde-image.png

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                                SGaist
                                Lifetime Qt Champion
                                wrote on 23 Aug 2021, 12:43 last edited by
                                #21

                                The question is: did you build the MongoDB C++ library in 32 or 64 bit ?

                                If the later then you can't use them with to build a 32bit application. Beside compiler, architecture matters as well. You can't mix and match 32 and 64 bit when building librairies or applications.

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

                                V 1 Reply Last reply 24 Aug 2021, 05:25
                                2
                                • S SGaist
                                  23 Aug 2021, 12:43

                                  The question is: did you build the MongoDB C++ library in 32 or 64 bit ?

                                  If the later then you can't use them with to build a 32bit application. Beside compiler, architecture matters as well. You can't mix and match 32 and 64 bit when building librairies or applications.

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                                  Vivek_A
                                  wrote on 24 Aug 2021, 05:25 last edited by
                                  #22
                                  This post is deleted!
                                  1 Reply Last reply
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                                    Vivek_A
                                    wrote on 24 Aug 2021, 06:27 last edited by
                                    #23

                                    my compiler is mingw32bit and mongocxx driver build in 64 bit . so thats make problem , i solved it by installing 64bit Qt.

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