error LNK2005

1>msvcprtd.lib(MSVCP100D.dll) : error LNK2005: "class std::basic_ostream<char,struct std::char_traits<char> > & __cdecl std::endl(class std::basic_ostream<char,struct std::char_traits<char> > &)" (?endl@std@@YAAEAV?$basic_ostream@DU?$char_traits@D@std@@@1@AEAV21@@Z) already defined in ComputerServer_C.obj


Monday, June 21, 2010
msvcprtd.lib(MSVCP100D.dll) : error LNK2005: already defined in gtestd.lib(gtest.obj)
This error occurs when the C/C++ Code Generation Runtime Library in gtest is defined differently from testing code using it.  The gtest project was defined as MTd (Multi-threaded Debug) and the testing project defined as MDd (Multi-threaded DLL).

Fix:  Changed the testing project to use MTd.  From the Property Pages select Configuration Properties ==> C/C++ ==> Code Generation ==> Runtime Library ==> Multi-threaded (/MT).

转自： http://stanlearnswindows.blogspot.com/2010/06/msvcprtdlibmsvcp100ddll-error-lnk2005.html