From mboxrd@z Thu Jan  1 00:00:00 1970
From: George Dunlap <george.dunlap@eu.citrix.com>
Subject: Re: [xen-4.3-testing bisection] complete build-i386
Date: Thu, 11 Jul 2013 16:13:19 +0100
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To: Ian Jackson <Ian.Jackson@eu.citrix.com>
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On 11/07/13 16:07, Ian Jackson wrote:
> If someone did an ad-hoc test build of changing Config.mk, it is
> possible that this is because one of
>
> (a) They didn't clean their tree _entirely thoroughly_.
>      "make clean" is not sufficient because it doesn't remove cloned
>      subdirectories.  "git-clean -x -d -f" is not sufficient because
>      it recurses into the cloned subdirectories, discovers that these
>      are separate git repositories, and stops.

If you specify -f twice it will override this behavior and delete cloned 
subdirectories.   So "git clean -ffdx" should really really really clean it.

  -George