/* n_29.c:  #undef directive.   */

/* 29.1:    Undefined macro is not a macro. */

/*  DEFINED;    */

#define DEFINED

#undef  DEFINED

    DEFINED;

/* 29.2:    Undefining undefined name is not an error.  */

#undef  UNDEFINED

/* { dg-do preprocess }

   { dg-final { if ![file exist n_29.i] { return }                      } }

   { dg-final { if \{ [grep n_29.i "DEFINED"] != ""             \} \{   } }

   { dg-final { return \}                                               } }

   { dg-final { fail "n_29.c: #undef"                                   } }

 */