c++网络编程问题

6 D:\Dev-Cpp\include\ace\OS_NS_stdio.h:414,               from D:\Dev-Cpp\include\ace\OS_NS_arpa_inet.inl                  from D:/Dev-Cpp/include/ace/OS_NS_stdio.h:414,               from D:/Dev-Cpp/include/ace/OS_NS_arpa_inet.inl

执行  g++.exe...
g++.exe "D:/clang/net002.cpp" -o "D:/clang/net002.exe"   -g3  -I"C:/Dev-Cpp/lib/gcc/mingw32/3.4.2/include"  -I"C:/Dev-Cpp/include/c++/3.4.2/backward"  -I"C:/Dev-Cpp/include/c++/3.4.2/mingw32"  -I"C:/Dev-Cpp/include/c++/3.4.2"  -I"C:/Dev-Cpp/include"   -L"C:/Dev-Cpp/lib" -g3
In file included from C:/Dev-Cpp/include/ace/config-win32.h:36,
                 from C:/Dev-Cpp/include/ace/config.h:44,
                 from C:/Dev-Cpp/include/ace/config-lite.h:24,
                 from C:/Dev-Cpp/include/ace/config-all.h:20,
                 from C:/Dev-Cpp/include/ace/OS.h:20,
                 from D:/clang/net002.cpp:1:

C:/Dev-Cpp/include/ace/config-win32-common.h:351:4: #error You must link against multi-threaded libraries when using ACE (check your project settings)
In file included from C:/Dev-Cpp/include/ace/Time_Value.h:382,
                 from C:/Dev-Cpp/include/ace/OS_NS_unistd.h:29,
                 from C:/Dev-Cpp/include/ace/OS_NS_stdio.inl:4,
                 from C:/Dev-Cpp/include/ace/OS_NS_stdio.h:414,
                 from C:/Dev-Cpp/include/ace/OS_NS_arpa_inet.inl:6,

                 from C:/Dev-Cpp/include/ace/OS_NS_arpa_inet.h:70,
                 from C:/Dev-Cpp/include/ace/OS.h:30,
                 from D:/clang/net002.cpp:1:
C:/Dev-Cpp/include/ace/Time_Value.inl:73: warning: 'void ACE_Time_Value::set(const timeval&)' defined locally after being referenced with dllimport linkage