From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Jan Beulich" <JBeulich@suse.com>
Subject: Re: Build problems with xen 4.7
Date: Tue, 01 Dec 2015 06:19:32 -0700
Message-ID: <565DAC7402000078000BACE9@prv-mh.provo.novell.com>
References: <alpine.DEB.2.00.1511302332250.32657@procyon.dur.ac.uk>
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To: M A Young <m.a.young@durham.ac.uk>
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>>> On 01.12.15 at 00:37, <m.a.young@durham.ac.uk> wrote:
> 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__=

Considering you're the first one to have such a problem, I think the
precise compiler version you use matters here. Also the redundant
definitions shouldn't be different, and identical re-definition should
not yield a diagnostic. So I think there's a little more data you need
to supply in order to determine whether we need to adjust something.

Jan