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undefined reference to `_imp___ZN8mongocxx7v_noabi8instanceC1Ev in Qt?

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qt5c++11mongodbc++ qt
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  • Vivek_AV Vivek_A

    @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
    
    JonBJ Offline
    JonBJ Offline
    JonB
    wrote on 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)...?

    jsulmJ 1 Reply Last reply
    1
    • JonBJ JonB

      @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)...?

      jsulmJ Offline
      jsulmJ Offline
      jsulm
      Lifetime Qt Champion
      wrote on 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

      JonBJ 1 Reply Last reply
      0
      • jsulmJ jsulm

        @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.

        JonBJ Offline
        JonBJ Offline
        JonB
        wrote on 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 += ...?

        jsulmJ 1 Reply Last reply
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        • JonBJ JonB

          @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 += ...?

          jsulmJ Offline
          jsulmJ Offline
          jsulm
          Lifetime Qt Champion
          wrote on 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

          JonBJ Vivek_AV 2 Replies Last reply
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          • jsulmJ jsulm

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

            JonBJ Offline
            JonBJ Offline
            JonB
            wrote on 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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            • jsulmJ jsulm

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

              Vivek_AV Offline
              Vivek_AV Offline
              Vivek_A
              wrote on 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

              jsulmJ JonBJ 2 Replies Last reply
              0
              • Vivek_AV Vivek_A

                @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

                jsulmJ Offline
                jsulmJ Offline
                jsulm
                Lifetime Qt Champion
                wrote on 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
                2
                • Vivek_AV Vivek_A

                  @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

                  JonBJ Offline
                  JonBJ Offline
                  JonB
                  wrote on 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.....

                  1 Reply Last reply
                  2
                  • Vivek_AV Offline
                    Vivek_AV Offline
                    Vivek_A
                    wrote on 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
                    
                    Vivek_AV 1 Reply Last reply
                    0
                    • Vivek_AV Vivek_A

                      @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
                      
                      Vivek_AV Offline
                      Vivek_AV Offline
                      Vivek_A
                      wrote on 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"
                      
                      1 Reply Last reply
                      0
                      • SGaistS Offline
                        SGaistS Offline
                        SGaist
                        Lifetime Qt Champion
                        wrote on 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

                        1 Reply Last reply
                        0
                        • Vivek_AV Offline
                          Vivek_AV Offline
                          Vivek_A
                          wrote on 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???

                          mrjjM 1 Reply Last reply
                          0
                          • Vivek_AV Vivek_A

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

                            mrjjM Offline
                            mrjjM Offline
                            mrjj
                            Lifetime Qt Champion
                            wrote on 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 ?

                            Vivek_AV 1 Reply Last reply
                            0
                            • mrjjM mrjj

                              @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 ?

                              Vivek_AV Offline
                              Vivek_AV Offline
                              Vivek_A
                              wrote on 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

                              1 Reply Last reply
                              0
                              • SGaistS Offline
                                SGaistS Offline
                                SGaist
                                Lifetime Qt Champion
                                wrote on 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

                                Vivek_AV 1 Reply Last reply
                                2
                                • SGaistS SGaist

                                  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.

                                  Vivek_AV Offline
                                  Vivek_AV Offline
                                  Vivek_A
                                  wrote on last edited by
                                  #22
                                  This post is deleted!
                                  1 Reply Last reply
                                  0
                                  • Vivek_AV Offline
                                    Vivek_AV Offline
                                    Vivek_A
                                    wrote on 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.

                                    1 Reply Last reply
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