vm\os-windows-x86.64.cpp(7) : error C2220: warning treated as error - no 'object' file generated vm\os-windows-x86.64.cpp(7) : warning C4091: '' : ignored on left of 'const unsigned char' when no variable is declared vm\os-windows-x86.64.cpp(7) : error C2143: syntax error : missing ';' before 'constant' vm\os-windows-x86.64.cpp(7) : error C2059: syntax error : 'constant' NMAKE : fatal error U1077: '"C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\BIN\x86_amd64\cl.EXE"' : return code '0x2' Stop. NMAKE : fatal error U1077: '"C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\BIN\nmake.EXE"' : return code '0x2' Stop. Build failed.