cygwin warning:
  MS-DOS style path detected: C:\Users\\xE4\xBA\x91\xE5\xBE\xAE\Desktop\\xE6\x96\xB0\xE5\xBB\xBA\xE6\x96\x87\xE4\xBB\xB6\xE5\xA4\xB9\part3\project-files\dynamips
  Preferred POSIX equivalent is: /cygdrive/c/Users/\xE4\xBA\x91\xE5\xBE\xAE/Desktop/\xE6\x96\xB0\xE5\xBB\xBA\xE6\x96\x87\xE4\xBB\xB6\xE5\xA4\xB9/part3/project-files/dynamips
  CYGWIN environment variable option "nodosfilewarning" turns off this warning.
  Consult the user's guide for more details about POSIX paths:
    http://cygwin.com/cygwin-ug-net/using.html#using-pathnames
