[U-Boot] [PATCH v5] SPL: Makefile: Build a separate autoconf.mk for SPL

[Scott Wood]

On Mon, 2013-08-19 at 16:14 +0800, ying.zhang at freescale.com wrote:
> From: Ying Zhang <b40530 at freescale.com>

No.  You added one line AFAICT.  Preserve the original author here.

> SPL defines CONFIG_SPL_BUILD but this does not percolate to the autoconf.mk Makefile.
> As a result the build breaks when CONFIG_SPL_BUILD is used in the board-specific include
> header file. With this, there is a possibility of having a CONFIG option defined in the
> header file but not defined in the Makefile causing all kinds of build failure and problems.
> 
> It also messes things for up, for example, when one might want to undefine options to
> keep the SPL small and doesn't want to be stuck with the CONFIG options used for U-boot.
> Lastly, this also avoids defining special CONFIG_SPL_ variables for cases where some
> options are required in U-boot but not in SPL.
> 
> We add a spl-autoconf.mk rule that is generated for SPL with the CONFIG_SPL_BUILD flag
> and conditionally include it for SPL builds.
> 
> Signed-off-by: Joel A Fernandes <joelagnel at ti.com>
> Signed-off-by: Ying Zhang <b40530 at freescale.com>
> ---
> Change from v4:
> - No change.
> Change from v3:
> - No change.

Surely there was *some* change or you wouldn't have reposted...

-Scott