gcc/testsuite/gcc.dg/format/cast-1.c

   1 /* Test for strings cast through integer types: should not be treated
   2    as format strings unless the types are of the same width as
   3    pointers (intptr_t or similar).  */
   4 /* Origin: Joseph Myers <joseph@codesourcery.com> */
   5 /* { dg-do compile } */
   6 /* { dg-options "-Wformat" } */
   7
   8 #include "format.h"
   9
  10 void
  11 f (int x)
  12 {
  13   printf("%s", x); /* { dg-warning "format" } */
  14   printf((char *)(__UINTPTR_TYPE__)"%s", x); /* { dg-warning "format" } */
  15   printf((char *)(char)"%s", x); /* { dg-warning "cast from pointer to integer of different size" } */
  16 }