gcc/testsuite/gcc.dg/c90-impl-decl-1.c

   1 /* Test for implicit function declaration: in C90 only.  */
   2 /* Origin: Joseph Myers <jsm28@cam.ac.uk> */
   3 /* { dg-do compile } */
   4 /* { dg-options "-std=iso9899:1990 -pedantic-errors" } */
   5
   6 void
   7 foo (void)
   8 {
   9   bar ();
  10 }
  11
  12 /* C90 subclause 7.1.7 says we can implicitly declare strcmp; C99 removes
  13    implict declarations.
  14 */
  15 int
  16 bar (const char *a, const char *b)
  17 {
  18   /* This fails for GCC CVS 20000709, but is not marked XFAIL since
  19      GCC 2.95.2 passes.
  20   */
  21   return strcmp (a, b); /* { dg-bogus "implicit" "implicit declaration warning for strcmp" } */
  22 }