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$NetBSD: patch-xen_include_xen_stdarg.h,v 1.3 2011/08/14 20:42:41 abs Exp $
--- xen/include/xen/stdarg.h.orig 2011-06-14 16:03:46.000000000 +0000
+++ xen/include/xen/stdarg.h
@@ -1,8 +1,19 @@
#if defined(__OpenBSD__)
# include "/usr/include/stdarg.h"
#elif defined (__NetBSD__)
+ /* Why not just include stdarg.h like everyone else? should explain */
typedef __builtin_va_list va_list;
-# define va_start(ap, last) __builtin_stdarg_start((ap), (last))
+# ifdef __GNUC__
+# define __GNUC_PREREQ__(x, y) \
+ ((__GNUC__ == (x) && __GNUC_MINOR__ >= (y)) || \
+ (__GNUC__ > (x)))
+# else
+# define __GNUC_PREREQ__(x, y) 0
+# endif
+# if !__GNUC_PREREQ__(4, 5)
+# define __builtin_va_start(ap, last) __builtin_stdarg_start((ap), (last))
+# endif
+# define va_start(ap, last) __builtin_va_start((ap), (last))
# define va_end(ap) __builtin_va_end(ap)
# define va_arg __builtin_va_arg
#else
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