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undefined reference to `_imp___ZN8mongocxx7v_noabi8instanceC1Ev in Qt?

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  • Vivek_AV Vivek_A

    hello iam solved my linking error of mongodb with qt creator , now i can include header file but when in command mongocxx::instance inst; error came

    E:/vivek/dw_tdoa_controller5/dw_tdoa_controller/main.cpp:37: undefined reference to `_imp___ZN8mongocxx7v_noabi8instanceC1Ev'
    

    my pro file

    win32:CONFIG(release, debug|release): LIBS += -LC:/mongo-cxx-driver/lib/ -llibmongocxx.dll
    else:win32:CONFIG(debug, debug|release): LIBS += -LC:/mongo-cxx-driver/lib/ -llibmongocxx.dll
    
    INCLUDEPATH += C:/mongo-cxx-driver/include/mongocxx/v_noabi
    DEPENDPATH += C:/mongo-cxx-driver/include/mongocxx/v_noabi
    
    win32:CONFIG(release, debug|release): LIBS += -LC:/mongo-cxx-driver/lib/ -llibbsoncxx.dll
    else:win32:CONFIG(debug, debug|release): LIBS += -LC:/mongo-cxx-driver/lib/ -llibbsoncxx.dll
    
    INCLUDEPATH += C:/mongo-cxx-driver/include/bsoncxx/v_noabi
    DEPENDPATH += C:/mongo-cxx-driver/include/bsoncxx/v_noabi
    

    how to fix it

    jsulmJ Offline
    jsulmJ Offline
    jsulm
    Lifetime Qt Champion
    wrote on last edited by
    #2

    @Vivek_A Please take a look at https://doc.qt.io/qt-5/qmake-variable-reference.html#libs
    and fix your LIBS (hint: you need to add .lib not .dll).

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

    Vivek_AV 1 Reply Last reply
    1
    • jsulmJ jsulm

      @Vivek_A Please take a look at https://doc.qt.io/qt-5/qmake-variable-reference.html#libs
      and fix your LIBS (hint: you need to add .lib not .dll).

      Vivek_AV Offline
      Vivek_AV Offline
      Vivek_A
      wrote on last edited by
      #3

      @jsulm hi, its build using mingw64 so there is only .a file not .lib .
      full file is llibmongocxx.dll.a , this pro file command is generate by this IDE not manually written .

      vk

      jsulmJ 1 Reply Last reply
      0
      • Vivek_AV Vivek_A

        @jsulm hi, its build using mingw64 so there is only .a file not .lib .
        full file is llibmongocxx.dll.a , this pro file command is generate by this IDE not manually written .

        jsulmJ Offline
        jsulmJ Offline
        jsulm
        Lifetime Qt Champion
        wrote on last edited by
        #4

        @Vivek_A Please take a look at the link I gave you and compare with what you did...
        Should be

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

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

        Vivek_AV 1 Reply Last reply
        1
        • jsulmJ jsulm

          @Vivek_A Please take a look at the link I gave you and compare with what you did...
          Should be

          LIBS += C:/mongo-cxx-driver/lib/llibbsoncxx.dll
          
          Vivek_AV Offline
          Vivek_AV Offline
          Vivek_A
          wrote on last edited by
          #5

          @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
          

          vk

          jsulmJ JonBJ 2 Replies Last reply
          0
          • 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
            
            jsulmJ Offline
            jsulmJ Offline
            jsulm
            Lifetime Qt Champion
            wrote on last edited by
            #6

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

            C:\mongo-cxx-driver\lib\llibbsoncxx.dll

            So, does this file exist? And I mean exact this path.

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

            1 Reply Last reply
            0
            • 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
                  0
                  • 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
                    0
                    • 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
                      0
                      • 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

                        vk

                        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
                              

                              vk

                              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"
                                

                                vk

                                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???

                                    vk

                                    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

                                        vk

                                        1 Reply Last reply
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                                        • 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
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