[U-Boot] [RFC PATCH 1/7] Adapt config.mk for usage in spl/Makefile

[Daniel Schwierzeck]

Hi Aneesh,

On Thu, Jun 30, 2011 at 7:12 AM, Aneesh V <aneesh at ti.com> wrote:
> On Thursday 30 June 2011 12:22 AM, Mike Frysinger wrote:
>>
>> On Wednesday, June 29, 2011 09:09:21 Aneesh V wrote:
>>>
>>> -$(obj)%.s:     %.S
>>> +$(obj)%.s:     $(src)%.S
>
> I too didn't understand why that was done. But I noticed it just before
> sending the patches so decided to give it a try later. I tried removing
> them now and it doesn't harm. Maybe, some of the changes I did to the
> definition of OBJTREE obj etc would have rendered it irrelevant?
>
> Daniel,
> Can you throw some light on this?
>

In my original patch I tweaked the src and obj variables to use spl as remote
build directory. As a consequence I had to change the implicite make rules too.

The regular way is:
src = $(TOPDIR)/arch/ARCH/cpu/CPU/start.S
obj = $(TOPDIR)/arch/ARCH/cpu/CPU/start.o (in-tree builds)
obj = $(BUILDDIR)/arch/ARCH/cpu/CPU/start.o (out-of-tree builds)

with spl as build directory:
src = $(TOPDIR)/arch/ARCH/cpu/CPU/start.S
obj = $(TOPDIR)/spl/arch/ARCH/cpu/CPU/start.o (in-tree builds)
obj = $(BUILDDIR)/spl/arch/ARCH/cpu/CPU/start.o (out-of-tree builds)

in the latter case I saw that $(src) got the value
$(TOPDIR)/spl/arch/ARCH/cpu/CPU/start.S
and the implicite make rules did not work anymore.

I'am glad if this works without those changes. I'll try
this for my boards too.

Best regards,
Daniel