-# define get_last_sys_error() errno
-# define clear_sys_error() errno=0
-# endif
-
-# if defined(WINDOWS)
-# define get_last_socket_error() WSAGetLastError()
-# define clear_socket_error() WSASetLastError(0)
-# define readsocket(s,b,n) recv((s),(b),(n),0)
-# define writesocket(s,b,n) send((s),(b),(n),0)
-# elif defined(__DJGPP__)
-# define WATT32
-# define WATT32_NO_OLDIES
-# define get_last_socket_error() errno
-# define clear_socket_error() errno=0
-# define closesocket(s) close_s(s)
-# define readsocket(s,b,n) read_s(s,b,n)
-# define writesocket(s,b,n) send(s,b,n,0)
-# elif defined(OPENSSL_SYS_VMS)
-# define get_last_socket_error() errno
-# define clear_socket_error() errno=0
-# define ioctlsocket(a,b,c) ioctl(a,b,c)
-# define closesocket(s) close(s)
-# define readsocket(s,b,n) recv((s),(b),(n),0)
-# define writesocket(s,b,n) send((s),(b),(n),0)
-# elif defined(OPENSSL_SYS_VXWORKS)
-# define get_last_socket_error() errno
-# define clear_socket_error() errno=0
-# define ioctlsocket(a,b,c) ioctl((a),(b),(int)(c))
-# define closesocket(s) close(s)
-# define readsocket(s,b,n) read((s),(b),(n))
-# define writesocket(s,b,n) write((s),(char *)(b),(n))
-# else
-# define get_last_socket_error() errno
-# define clear_socket_error() errno=0
-# define ioctlsocket(a,b,c) ioctl(a,b,c)
-# define closesocket(s) close(s)
-# define readsocket(s,b,n) read((s),(b),(n))
-# define writesocket(s,b,n) write((s),(b),(n))