[U-Boot] "make clean" not traversing into board-specific directories?

[James Chargin]

Dear Jörg,

On 05/18/2016 02:06 AM, Joerg.Scheuermann at continental-corporation.com wrote:
>> Von: Masahiro Yamada <yamada.masahiro at socionext.com>
>> Datum: 14.05.2016 11:11
>>
>> 2016-05-14 7:41 GMT+09:00 James Chargin <jimccrown at gmail.com>:
>>> Hi,
>>>
>>>
>>> On 05/13/2016 01:50 PM, Fabio Estevam wrote:
>>>>
>>>> Hi Jörg,
>>>>
>>>> On Fri, May 13, 2016 at 1:57 PM,
>>>> <Joerg.Scheuermann at continental-corporation.com> wrote:
>>>>>
>>>>> Hello,
>>>>>
>>>>> I am using u-boot 2015.04 and have a mechanism implemented in the
>>>>> board-specific Makefile for our board,
>>>>> which uses xsltproc to generate header-files from xml input files -
> this
>>>>> part is working by now.
>>>>>
>>>>> what is still not working is the removal of those generated files
> upon
>>>>> calling "make clean",
>>>>> and after some initial inspection I found out, that the
> board-specific
>>>>> directories are completely ignored when calling "make clean"!
>>>>>...

> Hi again,
>
> I 'solved' my case now by generating those headers into include/generated
> - as there is some existing magic already, that purges this directory upon
> "make distclean"
> (which actually is all I needed...)

Nice hack, good work.

>
> is that ok that way or are there some "rules" to not write board-specific
> stuff into this directory perhaps?
> (this may not work when building consecutive u-boots for different boards
> WITHOUT "make distclean" in between
>   - but in my understanding this needs to be done in this case anyway,
> correct?)

In a U-Boot 2015.07 build I've got, the other files I see in 
include/generated seem like they have been derived from the "make 
<my-board>_config".

So, your work seems to me to be compatible with the way things work more 
recently (I shouldn't be considered an authority on this).

I can't speak to what "rules" might say about it. I can't find any 
documented, which seems pretty much like "there are no rules" :)

>
> best regards,
> Jörg
>
>
> p.s.
> just a thought:
> maybe the reason for "make clean" ignoring the board-specific directories
> is to make it functional
> without the need to have a valid configuration at hand?
> (in other words: "make all" requires a "make xyz_config" before - "make
> clean/distclean/mrproper" does not)

This is an excellent observation, thanks.

I'd guess it means that if changes are ever made so "make clean" visits 
board directories, those changes will have be tolerant of there being no 
configuration established.

Best regards,
Jim
-- 
Jim Chargin
AJA Video Systems                       jimc at aja.com
(530) 271-3334                          http://www.aja.com