[U-Boot] SPL framework re-design

[Aneesh V]

Dear Wolfgang,

On Monday 27 June 2011 02:57 PM, Wolfgang Denk wrote:
> Dear Aneesh,
>
> In message<4E0804DC.8090805 at ti.com>  you wrote:
>>
>>>> +spl:	$(TIMESTAMP_FILE) $(VERSION_FILE) depend
>>>> +	$(MAKE) -C spl/ all
>>>> +
>>>>     $(obj)mmc_spl/u-boot-mmc-spl.bin:	mmc_spl
>>>
>>> The mmc_spl/ is suppoed to be moved into spl/, isn't it?
>>
>> This patch was intended only as a prototype for the new directory
>> structure. I didn't bother to touch the existing stuff.
>
> I see.
>
>>>> --- /dev/null
>>>> +++ b/spl/Makefile
>>>> @@ -0,0 +1,94 @@
>>>> +#
>>>> +# (C) Copyright 2011 Daniel Schwierzeck, daniel.schwierzeck at googlemail.com.
>>>
>>> Really???
>>
>> I copied Daniel's Makefile and started from there.
>
> I guess the only real part that was left from the old file is the GPL
> header...
>
>>> As Mike mentioned, we can eventually directly include the OBJSs here
>>> and omit the building of libraries?
>>
>> I can't seem to find a mail from Mike on this thread. Did I miss any
>> mail?
>
> I can find it either.  I don't know what I had in mind then.
>
>> Do you mean re-using equivalent libraries from the normal U-Boot
>> without re-compiling them?
>
> There are actually two different topics here:
>
> - The first is how to link all the objects in the spl/ tree together.
>    As I understand, you proposal was to link all objects in each of the
>    subdirectories into a library, and then link all the libraries
>    together.
>
>    Instead of doing this, we could as well just maintain a list of
>    objects and then link all these together directly, without creating
>    libraries first.
>

Is this like a make variable that keeps accumulating objects
from sub-directories? If so, is that through a *.mk at each level and
including all these *.mk at the top level Makefile. Or is there some 
other idea?

best regards,
Aneesh