From mboxrd@z Thu Jan  1 00:00:00 1970
From: M A Young <m.a.young@durham.ac.uk>
Subject: Build problems with xen 4.7
Date: Mon, 30 Nov 2015 23:37:23 +0000 (GMT)
Message-ID: <alpine.DEB.2.00.1511302332250.32657@procyon.dur.ac.uk>
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When I try to build the current xen 4.7 master I get the following error

<command-line>:0:0: error: "__OBJECT_FILE__" redefined [-Werror]
<command-line>:0:0: note: this is the location of the previous definition
cc1: all warnings being treated as errors

The problem seems to be that -D__OBJECT_FILE__= is set each time 
xen/Rules.mk is called, which happens more than once because of nested 
makes resulting in multiple diffent values for -D__OBJECT_FILE__=

	Michael Young