C:\Program Files\Microsoft Visual Studio 10.0\VC\INCLUDE\errno.h(92) : error C22 20: warning treated as error - no 'object' file generated C:\Program Files\Microsoft Visual Studio 10.0\VC\INCLUDE\errno.h(92) : warning C 4005: 'EADDRINUSE' : macro redefinition tmp32\e_os.h(153) : see previous definition of 'EADDRINUSE' NMAKE : fatal error U1077: '"C:\Program Files\Microsoft Visual Studio 10.0\VC\BI N\cl.EXE"' : return code '0x2' Stop.