linux-kernel - [RFD] How to support KBUILD

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Date:	Thu, 31 Dec 2015 11:13:15 +0800
From:	Bamvor Jian Zhang <bamvor.zhangjian@...aro.org>
To:	lkml <linux-kernel@...r.kernel.org>, linux-api@...r.kernel.org
Cc:	Michael Ellerman <mpe@...erman.id.au>,
	Mark Brown <broonie@...nel.org>,
	Kevin Hilman <khilman@...nel.org>,
	Shuah Khan <shuahkh@....samsung.com>,
	Tyler Baker <tyler.baker@...aro.org>, dvhart@...radead.org,
	Bamvor Zhang Jian <bamvor.zhangjian@...aro.org>
Subject: [RFD] How to support KBUILD_OUTPUT for kselftest?

Hi,

I am trying to improve cross compiling support for kselftest recently. Right
now I am stuck when I want to enable KBUILD_OUTPUT(O=xxx). It exist in wiki of
kselftest[1]. Hope it is not a duplicated work.

It seems that only perf tools(tools/perf) support it. And I could know that the
following Makefile are called when building perf:
tools/Makefile
tools/perf/Makefile
tools/perf/Makefile.perf
tools/build/Makefile.build

But I could not get the idea that how to do it for kselftest. Is there any
existed infrastructure I could use?

I am appreciated if there is any suggestions or ideas. Thanks in advance.

Regards

Bamvor

[1] https://kselftest.wiki.kernel.org/support_cross-compilation

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