# if defined(OPENSSL_SYS_WINDOWS)
# define strcasecmp _stricmp
# define strncasecmp _strnicmp
+# if (_MSC_VER >= 1310)
+# define open _open
+# define fdopen _fdopen
+# define close _close
+# define strdup _strdup
+# define unlink _unlink
+# endif
# elif defined(OPENSSL_SYS_VMS)
/* VMS below version 7.0 doesn't have strcasecmp() */
# include "internal/o_str.h"