[PATCH] kbuild: add KBUILD_DEFCONFIG

[Masahiro Yamada]

Hi Jean-Christophe,

On Tue, 13 Jan 2015 14:53:19 +0800
Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com> wrote:

> 
> > On Jan 13, 2015, at 2:46 PM, Masahiro Yamada <yamada.m at jp.panasonic.com> wrote:
> > 
> > This allows "make ARCH=... defconfig".
> > 
> > Fox example, you can type "make defconfig" instead of
> > "make sandbox_defconfig".
> > 
> > Signed-off-by: Masahiro Yamada <yamada.m at jp.panasonic.com>
> > ---
> > 
> > arch/arm/Makefile      | 1 +
> > arch/blackfin/Makefile | 1 +
> > arch/efi/Makefile      | 2 ++
> > arch/nios2/Makefile    | 2 ++
> > arch/openrisc/Makefile | 2 ++
> > arch/sandbox/Makefile  | 1 +
> > arch/x86/Makefile      | 2 ++
> > 7 files changed, 11 insertions(+)
> > 
> > diff --git a/arch/arm/Makefile b/arch/arm/Makefile
> > index f06e2a0..9dd983b 100644
> > --- a/arch/arm/Makefile
> > +++ b/arch/arm/Makefile
> > @@ -1,3 +1,4 @@
> > +KBUILD_DEFCONFIG := versatilepb_defconfig
> 
> no sure we need a default config on arm and some other
> 
> I known we use them on the kernel but here it could result in a broken board
> if use not carefully
> 
> for arch that only have 1 defconfig and will only have one maybe
> 

Why could it result in a broken board?  (It seems harmless to me.)

I think it is useful at least for Sandbox and some other arches that
have only "generic_defconfig".

It is true that KBUILD_DEFCONFIG is not so useful for ARM.
If it is not desired for ARM (and Blackfin), we can drop it, of course.



Best Regards
Masahiro Yamada