Problems of cross compiling with Linux and targeting Windows

[GreenYun]

OpenWSMan provides some libc functions when detecting that specific headers not found or WIN32 defined. But they're conflicting when building by MinGW.
MinGW provides almost full glibc functions as standard library, this makes TIME_WITH_SYS_TIME defined and the code including such as sys/time.h, while WIN32 alse defined, self-defined type like timezone is alse compiled. Duplicated type error occurs.