Re: Build problems with xen 4.7

[Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>]

On Tue, Dec 01, 2015 at 08:56:03AM -0700, Jan Beulich wrote:
> >>> On 01.12.15 at 15:36, <konrad.wilk@oracle.com> wrote:
> > On December 1, 2015 8:19:32 AM EST, Jan Beulich <JBeulich@suse.com> wrote:
> >>>>> 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.
> >>
> > 
> > Ccing Marcos who also saw this. Marcos do you remember the git commit that 
> > caused this?
> 
> There's no question about when this got introduced. What we need
> to understand is why this is an issue only for very few people.

It is only an issue when doing rpmbuilds.

Not when doing the build outside of that.
> 
> Jan
>