xen: Don't use __builtin_stdarg_start().

Cset fca49a00 ("netbsd: build fix with gcc 4.5") changed the
definition of va_start() to use __builtin_va_start() rather than
__builtin_stdarg_start() for GCCs >= 4.5, but in fact GCC dropped
__builtin_stdarg_start() before v3.3.

Signed-off-by: Tim Deegan <tim@xen.org>
Tested-by: Roger Pau Monné <roger.pau@citrix.com>

diff --git a/xen/include/xen/stdarg.h b/xen/include/xen/stdarg.h
index 0283f0652828ecabca18b581933c82cda2ff45d3..216fe6d414d38113bc94d0f1823f19edb579951e 100644 (file)
--- a/xen/include/xen/stdarg.h
+++ b/xen/include/xen/stdarg.h
@@ -1,18 +1,6 @@
 #ifndef __XEN_STDARG_H__
 #define __XEN_STDARG_H__
 
-#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
-
 typedef __builtin_va_list va_list;
 #define va_start(ap, last)    __builtin_va_start((ap), (last))
 #define va_end(ap)            __builtin_va_end(ap)