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/* { dg-do compile } */

/* { dg-options "-Wall -Wshadow" } */

extern double strtod (const char *, char **);

#define UNUSED __attribute__ ((unused))

/* A built-in function may be overridden by an old-style definition

   specifying too few arguments... */

double cos ()

{  /* { dg-warning "shadows a built-in" } */

  /* { dg-warning "warning: number of arguments doesn't match built-in prototype" "built-in" { target *-*-* } 10 } */

  return strtod ("nan", 0);

}

/* the right number, but the wrong type, arguments... */

double sin (foo)

     int foo UNUSED;  /* { dg-warning "shadows a built-in" } */

{  /* { dg-warning "warning: argument 'foo' doesn't match built-in prototype" } */

  return strtod ("nan", 0);

}

/* or too many arguments.  */

long double cosl (foo, bar)

     const char *foo UNUSED;  /* { dg-warning "shadows a built-in" } */

     int bar UNUSED;

{  /* { dg-warning "warning: number of arguments doesn't match built-in prototype" } */

  /* { dg-warning "warning: argument 'foo' doesn't match built-in prototype" "foo" { target *-*-* } 26 } */

  return strtod ("nan", 0);

}