gcc/testsuite/c-c++-common/pr66208.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-Wnonnull" } */
   3
   4 void foox (char*, ...) __attribute__ ((nonnull (1)));
   5 #define foo(p) foox (p, "p is null") /* { dg-warning "null argument" } */
   6
   7 void baz (void)
   8 {
   9   foo (0); /* { dg-message "note: in expansion" } */
  10 }