[U-Boot] [RFC PATCH 3/4] Add new folder and build system for SPL

[Wolfgang Denk]

Dear Aneesh V,

In message <4E16FD50.3090005 at ti.com> you wrote:
>
> > - use a different name instead of OBJTREE everywhere, and leave
> 
> What Daniel suggested about using something like SPLTREE(or SPLOBJTREE)
> seems to be be right solution then. Are you ok with that?

Yes, if it works without too much effort.

> > - introduce a new variable that stores the original setting of OBJTREE
> >    so we can refer to this later
> >
> >> I used BUILD_DIR/spl/obj as OBJTREE to avoid this problem.

Well, this may cause nasty problems.  Note that BUILD_DIR is usually
not set for local builds; current Makefile looks like this:

OBJTREE         := $(if $(BUILD_DIR),$(BUILD_DIR),$(CURDIR))
SRCTREE         := $(CURDIR)
TOPDIR          := $(SRCTREE)
...
ifneq ($(OBJTREE),$(SRCTREE))
...

Tests like this here will fail if you use BUILD_DIR (which is not set)
instead of OBJTREE (which is set to CURDIR).

> You want to continue to maintain nand_boot.c kind of files within
> $(TOPDIR)/spl/ , right?

Yes.  Copies of, or symlinks to, source files should be avoided.

Best regards,

Wolfgang Denk

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