\r
#define _EFI_INT_SIZE_OF(n) ((sizeof (n) + sizeof (UINTN) - 1) &~(sizeof (UINTN) - 1))\r
\r
+#if defined(__GNUC__)\r
+//\r
+// Use GCC built-in macros for variable argument lists.\r
+//\r
+\r
+///\r
+/// Variable used to traverse the list of arguments. This type can vary by \r
+/// implementation and could be an array or structure. \r
+///\r
+typedef __builtin_va_list VA_LIST;\r
+\r
+#define VA_START(Marker, Parameter) __builtin_va_start (Marker, Parameter)\r
+\r
+#define VA_ARG(Marker, TYPE) ((sizeof (TYPE) < sizeof (UINTN)) ? (TYPE)(__builtin_va_arg (Marker, UINTN)) : (TYPE)(__builtin_va_arg (Marker, TYPE)))\r
+\r
+#define VA_END(Marker) __builtin_va_end (Marker)\r
+\r
+#else\r
+\r
//\r
// Also support coding convention rules for var arg macros\r
//\r
#define VA_ARG(ap, t) (*(t *) ((ap += _EFI_INT_SIZE_OF (t)) - _EFI_INT_SIZE_OF (t)))\r
#define VA_END(ap) (ap = (VA_LIST) 0)\r
\r
+#endif\r
+\r
+\r
#endif\r
\r
#endif\r