[RFC, 1/2] scripts/kconfig/Makefile: Allow KBUILD_DEFCONFIG to be a target

[Michael Ellerman]

On Wed, 2015-23-09 at 05:40:34 UTC, Michael Ellerman wrote:
> Arch Makefiles can set KBUILD_DEFCONFIG to tell kbuild the name of the
> defconfig that should be built by default.
> 
> However currently there is an assumption that KBUILD_DEFCONFIG points to
> a file at arch/$(SRCARCH)/configs/$(KBUILD_DEFCONFIG).
> 
> We would like to use a target, using merge_config, as our defconfig, so
> adapt the logic in scripts/kconfig/Makefile to allow that.
> 
> To minimise the chance of breaking anything, we first check if
> KBUILD_DEFCONFIG is a file, and if so we do the old logic. If it's not a
> file, then we call the top-level Makefile with KBUILD_DEFCONFIG as the
> target.
> 
> Signed-off-by: Michael Ellerman <mpe at ellerman.id.au>
> Acked-by: Michal Marek <mmarek at suse.com>

Applied to powerpc next.

https://git.kernel.org/powerpc/c/d2036f30cfe1daa19e63ce75

cheers