problems while linking in MFc app

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  • rama
    #1

    problems while linking in MFc app

    HI,
    I have a win32 application that works okay but when i use the same
    classes in a MFC application , i am faced with problems. I am
    including a library into the MFC applicationand compilation goes fine.
    Please let me know what is wrong.

    Errors:

    Linking...
    msvcirtd.lib(MS VCIRTD.dll) : error LNK2005: "public: class ostream &
    __thiscall ostream::operat or<<(class ostream & (__cdecl*)(clas s
    ostream &))" (??6ostream@@QA EAAV0@P6AAAV0@A AV0@@Z@Z) already defined
    in improv-2.3.1.lib(Optio ns.obj)
    libci.lib(_ios. obj) : error LNK2005: "protected: __thiscall
    ios::ios(void)" (??0ios@@IAE@XZ ) already defined in
    msvcirtd.lib(MS VCIRTD.dll)
    libci.lib(_ios. obj) : error LNK2005: "public: virtual __thiscall
    ios::~ios(void) " (??1ios@@UAE@XZ ) already defined in
    msvcirtd.lib(MS VCIRTD.dll)
    libci.lib(ostre am.obj) : error LNK2005: "public: class ostream &
    __thiscall ostream::operat or<<(char const *)"
    (??6ostream@@QA EAAV0@PBD@Z) already defined in
    msvcirtd.lib(MS VCIRTD.dll)
    libci.lib(ostre am.obj) : error LNK2005: "public: class ostream &
    __thiscall ostream::flush( void)" (?flush@ostream @@QAEAAV1@XZ) already
    defined in msvcirtd.lib(MS VCIRTD.dll)
    LIBC.lib(crt0da t.obj) : error LNK2005: _exit already defined in
    msvcrtd.lib(MSV CRTD.dll)
    LIBC.lib(crt0da t.obj) : error LNK2005: __exit already defined in
    msvcrtd.lib(MSV CRTD.dll)
    LIBC.lib(crt0in it.obj) : error LNK2005: ___xc_z already defined in
    msvcrtd.lib(cin itexe.obj)
    LIBC.lib(crt0in it.obj) : error LNK2005: ___xc_a already defined in
    msvcrtd.lib(cin itexe.obj)
    LIBC.lib(crt0in it.obj) : error LNK2005: ___xi_z already defined in
    msvcrtd.lib(cin itexe.obj)
    LIBC.lib(crt0in it.obj) : error LNK2005: ___xi_a already defined in
    msvcrtd.lib(cin itexe.obj)
    msvcrtd.lib(MSV CRTD.dll) : error LNK2005: __setmbcp already defined in
    LIBC.lib(mbctyp e.obj)
    LINK : warning LNK4098: defaultlib "msvcrtd.li b" conflicts with use of
    other libs; use /NODEFAULTLIB:li brary
    LINK : warning LNK4098: defaultlib "LIBC" conflicts with use of other
    libs; use /NODEFAULTLIB:li brary
    midi2text.obj : error LNK2001: unresolved external symbol "private:
    void __thiscall midi2text::exam ple(void)" (?example@midi2 text@@AAEXXZ)
    midiGUI.exe : fatal error LNK1120: 1 unresolved externals
    Error executing link.exe.

    midiGUI.exe - 14 error(s), 2 warning(s)

    Thanks,
    Meera
    Tags: None
    • John Harrison
      #2
      Re: problems while linking in MFc app


      "rama" <meera_gn@hotma il.com> wrote in message
      news:ee0c6021.0 309050157.2218a 3fc@posting.goo gle.com...[color=blue]
      > HI,
      > I have a win32 application that works okay but when i use the same
      > classes in a MFC application , i am faced with problems. I am
      > including a library into the MFC applicationand compilation goes fine.
      > Please let me know what is wrong.
      >
      > Errors:
      >
      > Linking...
      > msvcirtd.lib(MS VCIRTD.dll) : error LNK2005: "public: class ostream &
      > __thiscall ostream::operat or<<(class ostream & (__cdecl*)(clas s
      > ostream &))" (??6ostream@@QA EAAV0@P6AAAV0@A AV0@@Z@Z) already defined
      > in improv-2.3.1.lib(Optio ns.obj)[/color]

      [snip]

      This is caused by having the wrong compiler options set when you compile.
      For advice on how to operate your compiler you should ask in a compiler
      group, this is not a language issue (which is what we discuss here). Try
      news:microsoft. public.vc.langu age or
      news:comp.os.ms-windows.program mer.tools.mfc for instance.

      john


        Comment

        • John Harrison
          #3
          Re: problems while linking in MFc app

          >[color=blue]
          > This is caused by having the wrong compiler options set when you compile.[/color]

          I should say, having different compiler options when you compile your
          library, from the compiler options you use when you compile your
          application.

          john


            Comment

            • Alex Sedow
              #4
              Re: problems while linking in MFc app

              1. Try add to "project properties/linker/input/ignore libraries": libc,
              nafxcw
              2. Try /Force option.

              Alex

              "rama" <meera_gn@hotma il.com> wrote in message
              news:ee0c6021.0 309050157.2218a 3fc@posting.goo gle.com...[color=blue]
              > HI,
              > I have a win32 application that works okay but when i use the same
              > classes in a MFC application , i am faced with problems. I am
              > including a library into the MFC applicationand compilation goes fine.
              > Please let me know what is wrong.
              >
              > Errors:
              >
              > Linking...
              > msvcirtd.lib(MS VCIRTD.dll) : error LNK2005: "public: class ostream &
              > __thiscall ostream::operat or<<(class ostream & (__cdecl*)(clas s
              > ostream &))" (??6ostream@@QA EAAV0@P6AAAV0@A AV0@@Z@Z) already defined
              > in improv-2.3.1.lib(Optio ns.obj)
              > libci.lib(_ios. obj) : error LNK2005: "protected: __thiscall
              > ios::ios(void)" (??0ios@@IAE@XZ ) already defined in
              > msvcirtd.lib(MS VCIRTD.dll)
              > libci.lib(_ios. obj) : error LNK2005: "public: virtual __thiscall
              > ios::~ios(void) " (??1ios@@UAE@XZ ) already defined in
              > msvcirtd.lib(MS VCIRTD.dll)
              > libci.lib(ostre am.obj) : error LNK2005: "public: class ostream &
              > __thiscall ostream::operat or<<(char const *)"
              > (??6ostream@@QA EAAV0@PBD@Z) already defined in
              > msvcirtd.lib(MS VCIRTD.dll)
              > libci.lib(ostre am.obj) : error LNK2005: "public: class ostream &
              > __thiscall ostream::flush( void)" (?flush@ostream @@QAEAAV1@XZ) already
              > defined in msvcirtd.lib(MS VCIRTD.dll)
              > LIBC.lib(crt0da t.obj) : error LNK2005: _exit already defined in
              > msvcrtd.lib(MSV CRTD.dll)
              > LIBC.lib(crt0da t.obj) : error LNK2005: __exit already defined in
              > msvcrtd.lib(MSV CRTD.dll)
              > LIBC.lib(crt0in it.obj) : error LNK2005: ___xc_z already defined in
              > msvcrtd.lib(cin itexe.obj)
              > LIBC.lib(crt0in it.obj) : error LNK2005: ___xc_a already defined in
              > msvcrtd.lib(cin itexe.obj)
              > LIBC.lib(crt0in it.obj) : error LNK2005: ___xi_z already defined in
              > msvcrtd.lib(cin itexe.obj)
              > LIBC.lib(crt0in it.obj) : error LNK2005: ___xi_a already defined in
              > msvcrtd.lib(cin itexe.obj)
              > msvcrtd.lib(MSV CRTD.dll) : error LNK2005: __setmbcp already defined in
              > LIBC.lib(mbctyp e.obj)
              > LINK : warning LNK4098: defaultlib "msvcrtd.li b" conflicts with use of
              > other libs; use /NODEFAULTLIB:li brary
              > LINK : warning LNK4098: defaultlib "LIBC" conflicts with use of other
              > libs; use /NODEFAULTLIB:li brary
              > midi2text.obj : error LNK2001: unresolved external symbol "private:
              > void __thiscall midi2text::exam ple(void)" (?example@midi2 text@@AAEXXZ)
              > midiGUI.exe : fatal error LNK1120: 1 unresolved externals
              > Error executing link.exe.
              >
              > midiGUI.exe - 14 error(s), 2 warning(s)
              >
              > Thanks,
              > Meera[/color]


                Comment

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