[PATCH] xen: Deal with stdarg.h and -nostdinc

[Christoph Egger <Christoph.Egger@amd.com>]

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For compiling the xen kernel we use -nostdinc which means
we don't want to rely on any external headers.
That also counts vor stdarg.h.

Use the external header when we compile the tools.
Adapt libelf-loader.c which is compiled in the kernel
and with the tools.

Signed-off-by: Christoph Egger <Christoph.Egger@amd.com>

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diff -r 24b01e02ea17 xen/common/libelf/libelf-loader.c
--- a/xen/common/libelf/libelf-loader.c	Thu May 26 11:34:49 2011 +0200
+++ b/xen/common/libelf/libelf-loader.c	Thu May 26 16:45:38 2011 +0200
@@ -16,7 +16,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  */
 
-#include <stdarg.h>
+#include "../../include/xen/stdarg.h"
 
 #include "libelf-private.h"
 
diff -r 24b01e02ea17 xen/include/xen/stdarg.h
--- a/xen/include/xen/stdarg.h	Thu May 26 11:34:49 2011 +0200
+++ b/xen/include/xen/stdarg.h	Thu May 26 16:45:38 2011 +0200
@@ -1,5 +1,13 @@
-#if defined(__OpenBSD__)
-#  include "/usr/include/stdarg.h"
+#ifndef _XEN_STDARG_H_
+#define _XEN_STDARG_H_
+
+#if defined(__XEN__)
+typedef __builtin_va_list va_list;
+#define va_start(ap, last)    __builtin_stdarg_start((ap), (last))
+#define va_end(ap)            __builtin_va_end(ap)
+#define va_arg                __builtin_va_arg
 #else
 #  include <stdarg.h>
 #endif
+
+#endif	/* _XEN_STDARG_H_ */

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