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

   1 /* Test for warnings for missing format attributes.  */
   2 /* Origin: Joseph Myers <jsm28@cam.ac.uk> */
   3 /* { dg-do compile } */
   4 /* { dg-options "-std=gnu99 -Wmissing-format-attribute" } */
   5
   6 #include "format.h"
   7
   8 void
   9 foo (const char *fmt, ...)
  10 {
  11   va_list ap;
  12   va_start (ap, fmt);
  13   vprintf (fmt, ap); /* { dg-warning "candidate" "printf attribute warning" } */
  14   va_end (ap);
  15 }
  16
  17 void
  18 bar (const char *fmt, ...)
  19 {
  20   va_list ap;
  21   va_start (ap, fmt);
  22   vscanf (fmt, ap); /* { dg-warning "candidate" "scanf attribute warning" } */
  23   va_end (ap);
  24 }
  25
  26 __attribute__((__format__(gnu_attr___printf__, 1, 2))) void
  27 foo2 (const char *fmt, ...)
  28 {
  29   va_list ap;
  30   va_start (ap, fmt);
  31   vprintf (fmt, ap);
  32   va_end (ap);
  33 }
  34
  35 void
  36 vfoo (const char *fmt, va_list arg)
  37 {
  38   vprintf (fmt, arg); /* { dg-warning "candidate" "printf attribute warning 2" } */
  39 }