[Buildroot] [PATCH] Linux kernel: add support for config fragment files

Floris Bos bos at je-eigen-domein.nl
Tue Feb 10 21:09:44 UTC 2015

On 02/10/2015 08:19 PM, Baruch Siach wrote:
> On Tue, Feb 10, 2015 at 02:50:21PM +0100, Floris Bos wrote:
>> Adds configuration option to merge additional kernel configuration files
>> to the main kernel configuration using scripts/kconfig/merge_config.sh
>> For use-cases in which it is desired to build a custom Linux kernel based on
>> the defconfig of the target device, but with a couple extra options/modules
>> enabled.
>> Signed-off-by: Floris Bos <bos at je-eigen-domein.nl>
>> ---
> [...]
>> @@ -178,6 +179,8 @@ define LINUX_CONFIGURE_CMDS
>>   	$(INSTALL) -m 0644 $(KERNEL_SOURCE_CONFIG) $(KERNEL_ARCH_PATH)/configs/buildroot_defconfig
>>   	$(TARGET_MAKE_ENV) $(MAKE1) $(LINUX_MAKE_FLAGS) -C $(@D) buildroot_defconfig
>>   	rm $(KERNEL_ARCH_PATH)/configs/buildroot_defconfig
>> +		$(@D)/scripts/kconfig/merge_config.sh -m -O $(@D) $(@D)/.config $(LINUX_KERNEL_CONFIG_FRAGMENTS))
> The merge_config.sh script is in the kernel since version 3.3. The -O
> parameter is only supported since v3.9. How do you handle older kernels?

Could make it use the merge_config.sh we have in buildroot (in 
support/kconfig) instead, if support for old kernel versions is a 

Yours sincerely,

Floris Bos

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