linux-kernel - Re: [PATCH] kbuild: let make O=dir rpm-pkg fail

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Date:	Thu, 5 Nov 2009 15:43:16 +0900
From:	Akinobu Mita <akinobu.mita@...il.com>
To:	Frans Pop <elendil@...net.nl>
Cc:	linux-kernel@...r.kernel.org, Sam Ravnborg <sam@...nborg.org>
Subject: Re: [PATCH] kbuild: let make O=dir rpm-pkg fail

2009/11/5 Frans Pop <elendil@...net.nl>:
> On Wednesday 04 November 2009, Akinobu Mita wrote:
>> make rpm-pkg with setting KBUILD_OUTPUT is not possible and
>> it will print the good message since the commit
>> db9038c89d129383a9db2afcb72b504fe54f6edf
>>
>> $ KBUILD_OUTPUT=dir make rpm-pkg
>> ...
>> Building source + binary RPM is not possible outside the
>> kernel source tree. Don't set KBUILD_OUTPUT, or use the
>> binrpm-pkg target instead.
>> ...
>>
>> make O=dir should have the same effect of KBUILD_OUTPUT, but
>> it won't print that message.
>>
>> This fixes it by exporting KBUILD_OUTPUT if O= is set so that
>> the rpm-pkg target in scripts/package/Makefile can find it.
>
> Looks good to me. I suspect this will also fix the open question that I had
> when I submitted the patch you refer to:
> <quote>
> One open issue is that the following commands should IIUC be identical,
> but the second one does not work:
> - KBUILD_OUTPUT=../builds/amd64 make -j4 binrpm-pkg
> - make -j4 O=../builds/amd64 binrpm-pkg
>
> AFAICT the root Makefile is supposed to set KBUILD_OUTPUT based on O=, but
> that is not visible when the lines within the binrpm-pkg target are
> executed.
> My make foo was not strong enough to debug this.
> </quote>

make binrpm-pkg with O= works without this patch on my system
(CentOS5 i386). So I did not mention about it in the patch description.

> I also suspect that the use of O= is currently equally broken for the
> deb-pkg target (I know setting KBUILD_OUTPUT does work) and that this
> patch will fix that as well.

I don't have debian based system and I can't test deb-pkg now.
But I hope it works, too.
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