linux-kernel - Re: [PATCH] Documentation: ptp: Fix build failure on MIPS cross builds

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Date:	Tue, 21 Oct 2014 18:04:51 -0400
From:	Peter Foley <pefoley2@...oley.com>
To:	Richard Cochran <richardcochran@...il.com>
Cc:	David Daney <ddaney.cavm@...il.com>,
	David Miller <davem@...emloft.net>, markos.chandras@...tec.com,
	linux-mips@...ux-mips.org, corbet@....net, netdev@...r.kernel.org,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] Documentation: ptp: Fix build failure on MIPS cross builds

On Tue, Oct 21, 2014 at 2:27 PM, Richard Cochran
<richardcochran@...il.com> wrote:
> On Tue, Oct 21, 2014 at 09:58:51AM -0700, David Daney wrote:
>> What I don't understand is why we are using hostprogs in this
>> Makefile.  Isn't this a program that would run on the target, not
>> the build host?
>
> Yes.
>
> Peter, could you please fix it?

The intention of these changes was to generate more compiliation
coverage for code in Documentation/
The underlying issue is that this doesn't work for cross-compiling
because kbuild doesn't have cross-compile support for userspace code.
I submitted a patch to disable building Documentation when
cross-compiling, as the consensus in the thread that resulted in that
patch (https://lkml.org/lkml/2014/10/8/510) was that implementing
targetprogs in kbuild was not currently worth it.
I can try to take a crack at adding targetprogs support, but I'm
rather busy right now, so it may take a little while.

Thanks,

Peter
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