linux-kernel - Re: [PATCH] tools: iio: add ability to pass kernel headers

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Message-ID: <6104d595-462b-c154-5b6a-73ed33d0b258@infradead.org>
Date:   Fri, 14 Apr 2017 08:23:03 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Jonathan Cameron <jic23@...nel.org>, Sekhar Nori <nsekhar@...com>
Cc:     Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] tools: iio: add ability to pass kernel headers

On 04/14/17 07:42, Jonathan Cameron wrote:
> On 11/04/17 12:06, Sekhar Nori wrote:
>> Very often, especially when cross compiling, there is a need
>> to pass kernel headers different from those installed on the
>> build machine.
>>
>> Add support for doing this for iio utils by using the
>> 'INSTALL_HDR_PATH' environment variable. This is supported by
>> 'make headers_install' for installing kernel headers at a
>> user specified location. So you will do:
>>
>> $ make headers_install ARCH=arm INSTALL_HDR_PATH=<absolute-path>
>> $ make -C tools/iio ARCH=arm INSTALL_HDR_PATH=<absolute-path>
>>
>> Signed-off-by: Sekhar Nori <nsekhar@...com>
> 
> It's a bit of an oddity as that usually refers to where to put
> the headers rather than where they are.
> 
> Is there a more general solution?  I couldn't find anything
> particularly consistent in tools.

Whatever the solution is, it should be used for all tools/, not just iio.

>> ---
>>  tools/iio/Makefile | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)


-- 
~Randy