gcc/testsuite/c-c++-common/Wsuggest-attribute-1.c

   1 /* PR c/98487 */
   2 /* { dg-do compile { target { c || c++11 } } } */
   3 /* { dg-options "-Wsuggest-attribute=format" } */
   4
   5 #include <stdarg.h>
   6
   7 [[gnu::__format__(__printf__, 1, 2)]]
   8 void
   9 do_printf(const char * const a0, ...)
  10 {
  11   va_list ap;
  12   va_start(ap, a0);
  13   __builtin_vprintf(a0, ap);
  14   va_end(ap);
  15 }
  16
  17 [[gnu::__format__(__scanf__, 1, 2)]]
  18 void
  19 do_scanf(const char * const a0, ...)
  20 {
  21   va_list ap;
  22   va_start(ap, a0);
  23   __builtin_vscanf(a0, ap);
  24   va_end(ap);
  25 }
  26
  27 struct tm;
  28
  29 [[gnu::__format__(__strftime__, 1, 0)]]
  30 void
  31 do_strftime(const char * const a0, struct tm * a1)
  32 {
  33   char buff[256];
  34   __builtin_strftime(buff, sizeof(buff), a0, a1);
  35   __builtin_puts(buff);
  36 }