（转载+心得） 关于添加了一个lib之后的链接错误2005

今天本想把在游戏中用到的FreeType字体的使用给总结一下,写一个Demo出来的.郁闷的事发生了,用vs2008建了一个空项目,装FreeType相关的一些代码给copy整理出来后,编译后Link是给我来了一大堆的error LNK2005错误:

1>Linking...

1>libcmt.lib(setlocal.obj) : error LNK2005: __configthreadlocale already defined in MSVCRTD.lib(MSVCR90D.dll)

1>libcmt.lib(tidtable.obj) : error LNK2005: __encode_pointer already defined in MSVCRTD.lib(MSVCR90D.dll)

1>libcmt.lib(tidtable.obj) : error LNK2005: __decode_pointer already defined in MSVCRTD.lib(MSVCR90D.dll)

1>libcmt.lib(crt0dat.obj) : error LNK2005: __amsg_exit already defined in MSVCRTD.lib(MSVCR90D.dll)

1>libcmt.lib(crt0dat.obj) : error LNK2005: __initterm_e already defined in MSVCRTD.lib(MSVCR90D.dll)

1>libcmt.lib(crt0dat.obj) : error LNK2005: _exit already defined in MSVCRTD.lib(MSVCR90D.dll)

1>libcmt.lib(crt0dat.obj) : error LNK2005: __exit already defined in MSVCRTD.lib(MSVCR90D.dll)

1>libcmt.lib(crt0dat.obj) : error LNK2005: __cexit already defined in MSVCRTD.lib(MSVCR90D.dll)

1>libcmt.lib(mlock.obj) : error LNK2005: __unlock already defined in MSVCRTD.lib(MSVCR90D.dll)

1>libcmt.lib(mlock.obj) : error LNK2005: __lock already defined in MSVCRTD.lib(MSVCR90D.dll)

1>libcmt.lib(winxfltr.obj) : error LNK2005: __XcptFilter already defined in MSVCRTD.lib(MSVCR90D.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(hooks.obj) : error LNK2005: "void __cdecl terminate(void)" (?terminate@@YAXXZ) already defined in MSVCRTD.lib(MSVCR90D.dll)

1>libcmt.lib(invarg.obj) : error LNK2005: __invoke_watson already defined in MSVCRTD.lib(MSVCR90D.dll)

1>libcmt.lib(invarg.obj) : error LNK2005: __invalid_parameter already defined in MSVCRTD.lib(MSVCR90D.dll)

1>libcmt.lib(errmode.obj) : error LNK2005: ___set_app_type already defined in MSVCRTD.lib(MSVCR90D.dll)

1>LINK : warning LNK4098: defaultlib 'MSVCRTD' conflicts with use of other libs; use /NODEFAULTLIB:library

1>MSVCRTD.lib(cinitexe.obj) : warning LNK4098: defaultlib 'libcmt.lib' conflicts with use of other libs; use /NODEFAULTLIB:library

1>libcmt.lib(crt0.obj) : error LNK2019: unresolved external symbol _main referenced in function ___tmainCRTStartup

1>F:/learn/MyProject/freetype/freetype/Debug/freetype.exe : fatal error LNK1120: 1 unresolved externals

     反复的检查过代码和工程的属性,发现好像没什么问题,基本上都是libcmtd.lib和MSVCRT.lib的冲突.后来在网上查到这个问题的所在了.问题出在原来snmp_d.lib原来是用MTd方式编译的,而没有办法知道它是这么编译的,但在VC6环境下加入这个库,把工程设为MDd,它居然能够成功编译,这就是问题所在,在VC2008下就没法编译了.所以在VC2008下,必须以MTd方式才可以编译成功.

    解决办法:

       在"Property Pages(项目属性) -> Configuration Properties(配制属性) -> Linker(链接器) -> Command Line(输入) -> Additional options(附加依赖项)"中加入 /NODEFAULTLIB:libc.lib /NODEFAULTLIB:libcmt.lib /NODEFAULTLIB:msvcrt.lib /NODEFAULTLIB:libcd.lib /NODEFAULTLIB:libcmtd.lib 重新编译就可以了.

注：我自己在VS08下建立的控制台中，又在cpp文件中加入了一句#include<iostream>，这样就没有错误了，程序执行无误。

另外，我的MFC下的同样性质的程序，出现了一大堆错误，

解决思路参考如下文章：

Compiling...
main.cpp
SLEEDispatcher.cpp
Linking...
LIBCD.lib(crt0dat.obj) : error LNK2005: __cinit already defined in LIBCMTD.lib(crt0dat.obj)
LIBCD.lib(crt0dat.obj) : error LNK2005: _exit already defined in LIBCMTD.lib(crt0dat.obj)
LIBCD.lib(crt0dat.obj) : error LNK2005: __exit already defined in LIBCMTD.lib(crt0dat.obj)
LIBCD.lib(crt0dat.obj) : error LNK2005: __cexit already defined in LIBCMTD.lib(crt0dat.obj)
LIBCD.lib(crt0dat.obj) : error LNK2005: __c_exit already defined in LIBCMTD.lib(crt0dat.obj)
LIBCD.lib(crt0dat.obj) : error LNK2005: __C_Exit_Done already defined in LIBCMTD.lib(crt0dat.obj)
LIBCD.lib(crt0dat.obj) : error LNK2005: __C_Termination_Done already defined in LIBCMTD.lib(crt0dat.obj)
LIBCD.lib(crt0dat.obj) : error LNK2005: __exitflag already defined in LIBCMTD.lib(crt0dat.obj)
LIBCD.lib(crt0dat.obj) : error LNK2005: __wpgmptr already defined in LIBCMTD.lib(crt0dat.obj)
LIBCD.lib(crt0dat.obj) : error LNK2005: __pgmptr already defined in LIBCMTD.lib(crt0dat.obj)
LIBCD.lib(crt0dat.obj) : error LNK2005: ___winitenv already defined in LIBCMTD.lib(crt0dat.obj)
LIBCD.lib(crt0dat.obj) : error LNK2005: __wenviron already defined in LIBCMTD.lib(crt0dat.obj)
LIBCD.lib(crt0dat.obj) : error LNK2005: ___initenv already defined in LIBCMTD.lib(crt0dat.obj)
LIBCD.lib(crt0dat.obj) : error LNK2005: __environ already defined in LIBCMTD.lib(crt0dat.obj)
LIBCD.lib(crt0dat.obj) : error LNK2005: ___wargv already defined in LIBCMTD.lib(crt0dat.obj)
LIBCD.lib(crt0dat.obj) : error LNK2005: ___argv already defined in LIBCMTD.lib(crt0dat.obj)
LIBCD.lib(crt0dat.obj) : error LNK2005: ___argc already defined in LIBCMTD.lib(crt0dat.obj)
LIBCD.lib(crt0dat.obj) : error LNK2005: __winminor already defined in LIBCMTD.lib(crt0dat.obj)
LIBCD.lib(crt0dat.obj) : error LNK2005: __winmajor already defined in LIBCMTD.lib(crt0dat.obj)
LIBCD.lib(crt0dat.obj) : error LNK2005: __winver already defined in LIBCMTD.lib(crt0dat.obj)
LIBCD.lib(crt0dat.obj) : error LNK2005: __osver already defined in LIBCMTD.lib(crt0dat.obj)
LIBCD.lib(crt0dat.obj) : error LNK2005: __umaskval already defined in LIBCMTD.lib(crt0dat.obj)
LINK : warning LNK4098: defaultlib "LIBCD" conflicts with use of other libs; use /NODEFAULTLIB:library
Debug/SLEEDispatcher.exe : fatal error LNK1169: one or more multiply defined symbols found
Error executing link.exe.

SLEEDispatcher.exe - 23 error(s), 1 warning(s)


CounterAction:
Project->Setting->Generation->Use MFC in a Shared DLL
注：然后把与lib有关的变量等的声明初始化都放在了对话框的cpp中，而不是在.h里面，同时毫无疑问的在linker里面添加了该lib库文件，最后程序编译链接成功，执行正确。