autoconf_sample  (directory)
   +-AUTHORS     (file)
   +-ChangeLog   (file)
   +-INSTALL     (file)
   +-LICENSE     (file)
   +-Makefile.am (file)
   +-NEWS        (file)
   +-README      (file)
   +-configure.ac (file)
   +-src         (directory)
      +hello.cpp (file)