gcc/testsuite/gcc.target/arm/va_list.c

   1 /* { dg-do run } */
   2 /* { dg-require-effective-target arm_eabi } */
   3
   4 #include <stdarg.h>
   5 #include <stddef.h>
   6
   7 /* AAPCS \S 7.1.4 requires that va_list match the structure shown
   8    here */
   9 typedef struct my_va_list
  10 {
  11   void *ap;
  12 } my_va_list;
  13
  14 int
  15 main () {
  16   if (sizeof (va_list) != sizeof (my_va_list))
  17     return 1;
  18   /* This check confirms both that "va_list" has a member named "__ap"
  19      and that it is located at the correct position.  */
  20   if (offsetof (va_list, __ap)
  21       != offsetof (my_va_list, ap))
  22     return 2;
  23
  24   return 0;
  25 }