mfcs42d.lib(dllmodul.obj) : error LNK2005: _DllMain@12 already defined in MSVCRTD.lib(dllmain.obj)

[ybbqy]

mfcs42d.lib(dllmodul.obj) : error LNK2005: _DllMain@12 already defined in MSVCRTD.lib(dllmain.obj)

我在setting|link|input "ignore libraries:", add in...

mfcs42.lib MSVCRT.lib


编译过去，但不知道为什么会出现这个问题，是我编程序的问题吗？

英文不太好，所以照作了，但不明白其意。请指点一二。



mfcs42.lib(dllmodul.obj) : error LNK2005: _DllMain@12 already defined in MSVCRT.lib(dllmain.obj)
mfcs42.lib(dllmodul.obj) : warning LNK4006: _DllMain@12 already defined in MSVCRT.lib(dllmain.obj); second definition ignored
Release/xxx.dll : fatal error LNK1169: one or more multiply defined symbols found

ANS: -Oct2002- to eliminate this linker bug, you need to force the linker to link with different .lib files in a specific order.. first mfcxxx.dll then msvcrtxxx.lib. Note the linker output error message and replace xxx with your version of .lib files.
for example for my "release build":
under setting|link|input "ignore libraries:", add in...

mfcs42.lib MSVCRT.lib

then re-add them under "object/library modules" in this exact order (mfc to be linked first).

mfcs42.lib MSVCRT.lib

[AkiraChing]

CRT 库对于 new、delete 和 DllMain 函数使用弱外部链接。由于 MFC 库也包含 new、delete 和 DllMain 函数，这样就要求先链接 MFC 库，然后再链接 CRT 库。
有两种解决方法。
可以参考知识库文章
http://support.microsoft.com/default.aspx?scid=kb;zh-cn;148652&Product=vccIN1