gcc/testsuite/gcc.dg/pr81345.c

   1 /* PR other/81345 - -Wall resets -Wstringop-overflow to 1 from the default 2
   2    { dg-do compile }
   3    { dg-options "-O2 -Wall -Wno-array-bounds" } */
   4
   5 char a[3];
   6
   7 void f (const char *s)
   8 {
   9   __builtin_strncpy (a, s, sizeof a + 1);   /* { dg-warning "\\\[-Wstringop-overflow=]" } */
  10 }
  11
  12 struct S { char a[3]; int i; };
  13
  14 void g (struct S *d, const char *s)
  15 {
  16   __builtin_strncpy (d->a, s, sizeof d->a + 1);   /* { dg-warning "\\\[-Wstringop-overflow=]" } */
  17 }