text: /* { dg-do preprocess } */
  /* { dg-options "-std=c99 -pedantic -fextended-identifiers" } */
  
  \u00AA
  \u00AB /* { dg-error "not valid in an identifier" } */
  \u00B6 /* { dg-error "not valid in an identifier" } */
  \u00BA
  \u00C0
  \u00D6
  \u0384 /* { dg-error "not valid in an identifier" } */
  
  \u0669 /* { dg-error "not valid at the start of an identifier" } */
  A\u0669
  0\u00BA
  0\u0669
  \u0E59 /* { dg-error "not valid at the start of an identifier" } */
  A\u0E59
  