Re: [Buildroot] [PATCH v1 6/8] support/kconfig: bump to linux-v6.9-rc5 version

["Yann E. MORIN" <yann.morin.1998@free.fr>]

Peter, Petr, All,

On 2024-05-08 23:54 +0200, Peter Seiderer via buildroot spake thusly:
> On Wed, 8 May 2024 23:41:44 +0200, Petr Vorel <petr.vorel@gmail.com> wrote:
[--SNIP--]
> > Even with applied patch 7th and 8th (and the others applied previously simple
> > 'make defconfig' fails:
> > 
> > buildroot/output/build/buildroot-config/conf: Kconfig file missing
> > Usage: buildroot/output/build/buildroot-config/conf [options] <kconfig-file>
[--SNIP--]
> Known problem ;-), see cover letter
> > Works for me despite 'make defconfig'...

I think you meant: s/despite/except/

And I think the solution is easy:

    Makefile: always use a base config file for defconfig

    Currently, our bundled kconfig copy does not require that a base
    configuration file, with some non-default set in there, be specified
    for defconfig, and we only pass one if specified by the user.

    Future kconfig versions will require a base config file be always
    specified, so prepare for that: if the user did not specify a base
    config file, use /dev/null, an empty file, to specify there is no
    preset value.

    Reported-by: Petr Vorel <petr.vorel@gmail.com>
    Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

    diff --git a/Makefile b/Makefile
    index d1caec63b5..a46dd79239 100644
    --- a/Makefile
    +++ b/Makefile
    @@ -1015,7 +1015,7 @@ oldconfig syncconfig olddefconfig: $(BUILD_DIR)/buildroot-config/conf outputmake
     	@$(COMMON_CONFIG_ENV) $< --$@ $(CONFIG_CONFIG_IN)

     defconfig: $(BUILD_DIR)/buildroot-config/conf outputmakefile
    -	@$(COMMON_CONFIG_ENV) $< --defconfig$(if $(DEFCONFIG),=$(DEFCONFIG)) $(CONFIG_CONFIG_IN)
    +	@$(COMMON_CONFIG_ENV) $< --defconfig=$(or $(DEFCONFIG),/dev/null) $(CONFIG_CONFIG_IN)

     %_defconfig: $(BUILD_DIR)/buildroot-config/conf  outputmakefile
     	@defconfig=$(or \

This also works with thecurrnt kconfig version we bundle, so this can be
a preliminray patch.

Regards,
Yann E. MORIN.

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