When useing the macro of _WIN32 in the file of rtconfig.h , then the file of dfs_win32.c will removed and compiled some mistakes. Fix it.
@@ -238,7 +238,7 @@
#endif /* end of _MSC_VER */
-#ifdef _WIN32
+#ifdef _Win32
#define RT_USING_DFS_WINSHAREDIR
#endif