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

[Baruch Siach]

Hi Floris,

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
> +	$(if $(LINUX_KERNEL_CONFIG_FRAGMENTS),
> +		$(@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?

baruch

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