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    [Solved]Linking to some functions of windows sockets api

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    • S
      swhweng last edited by

      Hello,
      I have a Qt project with libmodbus in it.
      On Linux it compiles and links ok , but on Windows there are linking errors that I try to resolve and ask here perhaps somebody
      get the same problem:
      I defined
      @
      #define WINVER = 0x0501@

      There is a C code that uses some functions for tcp/ip communication
      I included: <Ws2tcpip.h> <winsock.h><winsock2.h><w32api.h><winnetwk.h><ws2spi.h><wtsapi32.h>
      also
      and also added to Qt .pro file next library
      @win32:LIBS += -lsetupapi
      -Ws_2_32.lib@

      The compiler is mingw32

      I get next linking errors:

      ./release\modbus-tcp.o:modbus-tcp.c:(.text+0x128): undefined reference to setsockopt@20' ./release\modbus-tcp.o:modbus-tcp.c:(.text+0x160): undefined reference to setsockopt@20'
      ./release\modbus-tcp.o:modbus-tcp.c:(.text+0x1b7): undefined reference to getaddrinfo@16' ./release\modbus-tcp.o:modbus-tcp.c:(.text+0x1ec): undefined reference to socket@12'
      ./release\modbus-tcp.o:modbus-tcp.c:(.text+0x214): undefined reference to connect@12' ./release\modbus-tcp.o:modbus-tcp.c:(.text+0x22c): undefined reference to freeaddrinfo@4'
      ./release\modbus-tcp.o:modbus-tcp.c:(.text+0x244): undefined reference to closesocket@4' ./release\modbus-tcp.o:modbus-tcp.c:(.text+0x28b): undefined reference to socket@12'
      ./release\modbus-tcp.o:modbus-tcp.c:(.text+0x2b9): undefined reference to htons@4' ./release\modbus-tcp.o:modbus-tcp.c:(.text+0x2c6): undefined reference to inet_addr@4'
      ./release\modbus-tcp.o:modbus-tcp.c:(.text+0x2e4): undefined reference to connect@12' ./release\modbus-tcp.o:modbus-tcp.c:(.text+0x314): undefined reference to closesocket@4'
      ./release\modbus-tcp.o:modbus-tcp.c:(.text+0x5e0): undefined reference to select@20' ./release\modbus-tcp.o:modbus-tcp.c:(.text+0x673): undefined reference to accept@12'
      ./release\modbus-tcp.o:modbus-tcp.c:(.text+0x6a6): undefined reference to closesocket@4' ./release\modbus-tcp.o:modbus-tcp.c:(.text+0x6de): undefined reference to accept@12'
      ./release\modbus-tcp.o:modbus-tcp.c:(.text+0x707): undefined reference to inet_ntoa@4' ./release\modbus-tcp.o:modbus-tcp.c:(.text+0x72f): undefined reference to closesocket@4'
      ./release\modbus-tcp.o:modbus-tcp.c:(.text+0x7b0): undefined reference to getaddrinfo@16' ./release\modbus-tcp.o:modbus-tcp.c:(.text+0x813): undefined reference to setsockopt@20'
      ./release\modbus-tcp.o:modbus-tcp.c:(.text+0x822): undefined reference to closesocket@4' ./release\modbus-tcp.o:modbus-tcp.c:(.text+0x855): undefined reference to socket@12'
      ./release\modbus-tcp.o:modbus-tcp.c:(.text+0x88e): undefined reference to bind@12' ./release\modbus-tcp.o:modbus-tcp.c:(.text+0x89d): undefined reference to closesocket@4'
      ./release\modbus-tcp.o:modbus-tcp.c:(.text+0x8cb): undefined reference to listen@8' ./release\modbus-tcp.o:modbus-tcp.c:(.text+0x8dd): undefined reference to freeaddrinfo@4'
      ./release\modbus-tcp.o:modbus-tcp.c:(.text+0x907): undefined reference to freeaddrinfo@4' ./release\modbus-tcp.o:modbus-tcp.c:(.text+0x918): undefined reference to closesocket@4'
      ./release\modbus-tcp.o:modbus-tcp.c:(.text+0x966): undefined reference to socket@12' ./release\modbus-tcp.o:modbus-tcp.c:(.text+0x9a2): undefined reference to setsockopt@20'
      ./release\modbus-tcp.o:modbus-tcp.c:(.text+0x9ca): undefined reference to htons@4' ./release\modbus-tcp.o:modbus-tcp.c:(.text+0x9ea): undefined reference to bind@12'
      ./release\modbus-tcp.o:modbus-tcp.c:(.text+0x9ff): undefined reference to listen@8' ./release\modbus-tcp.o:modbus-tcp.c:(.text+0xa18): undefined reference to closesocket@4'
      ./release\modbus-tcp.o:modbus-tcp.c:(.text+0xa57): undefined reference to recv@16' ./release\modbus-tcp.o:modbus-tcp.c:(.text+0xa9e): undefined reference to recv@16'
      ./release\modbus-tcp.o:modbus-tcp.c:(.text+0xac1): undefined reference to shutdown@8' ./release\modbus-tcp.o:modbus-tcp.c:(.text+0xacf): undefined reference to closesocket@4'
      ./release\modbus-tcp.o:modbus-tcp.c:(.text+0xb92): undefined reference to `send@16'
      It seems mingw could not link to windows socket functions that are in the list.
      What header to include, what library to add to .pro file so as the linking will succeed?
      Thank you very much
      Awaiting for your help.

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      • G
        giesbert last edited by

        mingw can't link .lib files.
        you should try :

        @
        win32:LIBS += -lsetupapi
        -lWs_2_32
        @

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

        1 Reply Last reply Reply Quote 0
        • G
          goetz last edited by

          Also, please not that the lib is named "ws2_32", so you have to add to your .pro file:

          @
          LIBS += -lws2_32
          @

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

          1 Reply Last reply Reply Quote 0
          • S
            swhweng last edited by

            yes,
            there should be added -lws2_32 and not -Ws_2_32.lib to project file LIBS section.
            Thank you. It links. Solved!

            1 Reply Last reply Reply Quote 0
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