gcc/testsuite/gcc.dg/builtins-30.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-Wall -Wshadow" } */
   3
   4 extern double strtod (const char *, char **);
   5 #define UNUSED __attribute__ ((unused))
   6
   7 /* A built-in function may be overridden by an old-style definition
   8    specifying too few arguments... */
   9 double cos ()
  10 {  /* { dg-warning "shadows a built-in" } */
  11   return strtod ("nan", 0);
  12 }
  13
  14 /* the right number, but the wrong type, arguments... */
  15 double sin (foo)
  16      int foo UNUSED;  /* { dg-warning "shadows a built-in" } */
  17 {
  18   return strtod ("nan", 0);
  19 }
  20
  21 /* or too many arguments.  */
  22 long double cosl (foo, bar)
  23      const char *foo UNUSED;  /* { dg-warning "shadows a built-in" } */
  24      int bar UNUSED;
  25 {
  26   return strtod ("nan", 0);
  27 }