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I'm writing a 3D image engine (it reads a XML with a scene info and it prints with openGL) for college, in visual studio (unfortunately...), and I'm doing the parser atm, which reads the xml into a simple tree-like data structure. One of the elements is Camera and before i added that part of the data structure, the program was running ok, but after i added it, i'm having the following errors:

1>LIBCMT.lib(stdexcpt.obj) : error LNK2005: "public: virtual char const * __thiscall std::exception::what(void)const " (?what@exception@std@@UBEPBDXZ) already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LIBCMT.lib(stdexcpt.obj) : error LNK2005: "public: __thiscall std::exception::exception(char const * const &)" (??0exception@std@@QAE@ABQBD@Z) already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LIBCMT.lib(stdexcpt.obj) : error LNK2005: "public: virtual __thiscall std::exception::~exception(void)" (??1exception@std@@UAE@XZ) already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LIBCMT.lib(stdexcpt.obj) : error LNK2005: "public: __thiscall std::exception::exception(class std::exception const &)" (??0exception@std@@QAE@ABV01@@Z) already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LIBCMT.lib(_fpinit_.obj) : error LNK2005: __fltused already defined in a previous module
1>LIBCMT.lib(_fpinit_.obj) : error LNK2005: __ldused already defined in a previous module
1>LIBCMT.lib(invarg.obj) : error LNK2005: __invoke_watson already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LIBCMT.lib(invarg.obj) : error LNK2005: __invalid_parameter already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LIBCMT.lib(_ctype.obj) : error LNK2005: _isalpha already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LIBCMT.lib(_ctype.obj) : error LNK2005: _isspace already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LIBCMT.lib(_ctype.obj) : error LNK2005: _isalnum already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LIBCMT.lib(crt0dat.obj) : error LNK2005: __initterm_e already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LIBCMT.lib(crt0dat.obj) : error LNK2005: _exit already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LIBCMT.lib(crt0dat.obj) : error LNK2005: __exit already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LIBCMT.lib(crt0dat.obj) : error LNK2005: __cexit already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LIBCMT.lib(crt0dat.obj) : error LNK2005: __amsg_exit already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LIBCMT.lib(mlock.obj) : error LNK2005: __unlock already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LIBCMT.lib(mlock.obj) : error LNK2005: __lock already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LIBCMT.lib(winxfltr.obj) : error LNK2005: __XcptFilter already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LIBCMT.lib(setlocal.obj) : error LNK2005: __configthreadlocale already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LIBCMT.lib(hooks.obj) : error LNK2005: "void __cdecl terminate(void)" (?terminate@@YAXXZ) already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LIBCMT.lib(crt0init.obj) : error LNK2005: ___xi_a already defined in MSVCRTD.lib(cinitexe.obj)
1>LIBCMT.lib(crt0init.obj) : error LNK2005: ___xi_z already defined in MSVCRTD.lib(cinitexe.obj)
1>LIBCMT.lib(crt0init.obj) : error LNK2005: ___xc_a already defined in MSVCRTD.lib(cinitexe.obj)
1>LIBCMT.lib(crt0init.obj) : error LNK2005: ___xc_z already defined in MSVCRTD.lib(cinitexe.obj)
1>LIBCMT.lib(crt0.obj) : error LNK2005: _mainCRTStartup already defined in MSVCRTD.lib(crtexe.obj)
1>LIBCMT.lib(errmode.obj) : error LNK2005: ___set_app_type already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LIBCMT.lib(atox.obj) : error LNK2005: _atoi already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LIBCMT.lib(tolower.obj) : error LNK2005: _tolower already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LIBCMT.lib(strtol.obj) : error LNK2005: _strtol already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LINK : warning LNK4098: defaultlib 'MSVCRTD' conflicts with use of other libs; use /NODEFAULTLIB:library
1>LINK : warning LNK4098: defaultlib 'LIBCMT' conflicts with use of other libs; use /NODEFAULTLIB:library
1>bin\CGFexample.exe : fatal error LNK1169: one or more multiply defined symbols found

I can't understand why adding a simple new class would create such a weird error, can anyone help?

P.S. Ill add the camera class if needed but its really just a bunch of variables with sets and gets and two child classes (there's two types of cameras), and I don't think the problem is because of the class itself anyway.

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2 回答 2

6

正如@John 所提到的，您应该使用动态或静态 C 运行时链接。在 Visual Studio 中，这由 RunTime Library property（C/C++ 文件夹 > 代码生成 > 运行时库属性）控制。C 运行时有 4 个选项：调试/发布和静态/动态。

旁注：如果您使用的是第 3 方 dll，清单文件应为您提供有关正在使用的运行时间的一些信息。您可以使用Dependency Walker等工具仔细检查它（如果是动态的，您将看到一个名为 MSVCRXXX.DLL 的 dll），其中 XXX 是 VC 的版本和 D 用于调试

于 2013-10-02T11:27:49.870 回答
4

我解决了您忽略其中一个库的具体问题。

为此，转到 ( Project Properties->Linker->Input->Ignore Specific Default Libraries) 并输入LIBCMT.lib

于 2014-10-16T19:18:27.267 回答