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   /* { dg-warning "number of arguments doesn't match built-in prototype" "built-in" { target *-*-* } 10 } */
  12   return strtod ("nan", 0);
  13 }
  14
  15 /* the right number, but the wrong type, arguments... */
  16 double sin (foo)
  17      int foo UNUSED;  /* { dg-warning "shadows a built-in" } */
  18 {  /* { dg-warning "argument 'foo' doesn't match built-in prototype" } */
  19   return strtod ("nan", 0);
  20 }
  21
  22 /* or too many arguments.  */
  23 long double cosl (foo, bar)
  24      const char *foo UNUSED;  /* { dg-warning "shadows a built-in" } */
  25      int bar UNUSED;
  26 {  /* { dg-warning "number of arguments doesn't match built-in prototype" } */
  27   /* { dg-warning "argument 'foo' doesn't match built-in prototype" "foo" { target *-*-* } 26 } */
  28   return strtod ("nan", 0);
  29 }