ext-5.c

this is a gcc file, you can download it and learn its usetility, for further detail please look at t

/* Test for gettext default attributes.  */
/* Origin: Joseph Myers <[e-mail]> */
/* { dg-do compile } */
/* { dg-options "-std=gnu99 -Wformat" } */

#include "format.h"

void
foo (int i, long l)
{
  printf (gettext ("%d"), i);
  printf (gettext ("%ld"), i); /* { dg-warning "format" "gettext" } */
  printf (dgettext ("", "%d"), i);
  printf (dgettext ("", "%ld"), i); /* { dg-warning "format" "dgettext" } */
  printf (dcgettext ("", "%d", 0), i);
  printf (dcgettext ("", "%ld", 0), i); /* { dg-warning "format" "dcgettext" } */
}