gcc/testsuite/gcc.dg/c99-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=iso9899:1999 -pedantic-errors" } */
   5
   6 void
   7 foo (void)
   8 {
   9   bar (); /* { dg-bogus "warning" "warning in place of error" } */
  10  /* { dg-error "implicit" "C99 implicit declaration error" { target *-*-* } .-1 } */
  11 }
  12
  13 /* C90 subclause 7.1.7 says we can implicitly declare strcmp; C99 removes
  14    implict declarations.
  15 */
  16 int
  17 bar (const char *a, const char *b)
  18 {
  19   return strcmp (a, b); /* { dg-bogus "warning" "warning in place of error" } */
  20   /* { dg-error "implicit" "C99 implicit declaration error" { target *-*-* } .-1 } */
  21 }