gcc/testsuite/gcc.dg/wtr-union-init-1.c

   1 /* Test for -Wtraditional warnings on union initialization.
   2    Note, gcc should omit these warnings in system header files.
   3    By Kaveh R. Ghazi <ghazi@caip.rutgers.edu> 8/22/2000.  */
   4 /* { dg-do compile } */
   5 /* { dg-options "-Wtraditional" } */
   6
   7 union foo
   8 {
   9   int i;
  10   long l;
  11 };
  12
  13 void
  14 testfunc ()
  15 {
  16   /* Note we only warn for nonzero initializers.  */
  17   static union foo f1 = { 0 };
  18   static union foo f2 = { 1 }; /* { dg-warning "traditional C rejects initialization of unions" "initialization of unions" } */
  19
  20 # 21 "sys-header.h" 3
  21 /* We are in system headers now, no -Wtraditional warnings should issue.  */
  22
  23   static union foo f3 = { 0 };
  24   static union foo f4 = { 1 };
  25 }