[PATCH] dtc: Add -i option to support search paths

[Simon Glass]

Hi Jon,

On Mon, Mar 12, 2012 at 6:54 AM, Jon Loeliger <jdl at jdl.com> wrote:
>> It is often inconvenient to place device tree files in the same directory
>> as their includes, or to specify the full path to include files.
>>
>> An example of this is in U-Boot where we have a .dtsi file for each SOC
>> type, and this is included by the board .dts file. We need to either use
>> a mechanism like:
>>
>> /include/ ARCH_CPU_DTS
>>
>> with sed or cpp to perform the replacement with the correct path, or
>> we must specify the full path in the file:
>>
>> /include/ "../../arch/arm/dts/tegra20.dtsi"
>>
>> The first option is not desirable since it requires anyone compiling the
>> file to first pre-process it. The second is not desirable since it
>> introduces a path which is project-specific into a file which is supposed
>> to be a hardware description. For example Linux and U-Boot are unlikely to
>> put these include files in the same place.
>>
>> It is much more convenient to specify the search patch on the command line
>> as is done with C pre-processors, for example.
>>
>> Introduce a -i option to add to the list of search paths used to find
>> source and include files.
>>
>> We cannot use -I as it is already in use. Other suggestions welcome.
>>
>> Signed-off-by: Simon Glass <sjg at chromium.org>
>
> Any comments here?  I'm inclined to aply it as is.

My main concern is to make sure that -i is the best choice for this.
So it would be good to have thoughts on that at least.

Apart from that, I will send a new patch which adds one more test and
fixes a typo.

Regards,
Simon

>
> Thanks,
> jdl