[Buildroot] [PATCH 1/1] linux: Deselect all unconfigured compression options

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

Cam, All,

On 2017-10-19 21:59 +1100, Cam Hutchison spake thusly:
> The LINUX_KCONFIG_FIXUP_CMDS are meant to deselect any compression
> option that are not selected in the buildroot configuration. But it only
> deselects the last one in the list instead of all of them because it
> overwrites the LINUX_COMPRESSION_OPT_ variable instead of appending to
> it. Only the last option set to that variable gets deselected.
> 
> This produces the warning:
> 
> .config:2216:warning: override: KERNEL_GZIP changes choice state
> 
> is emitted when buildroot runs olddefconfig when buildroot configures a
> kernel with a custom config that has a different kernel compression
> option set to what is configured in buildroot.
> 
> Accumulate all the deselected compression options instead of overwriting
> them to ensure all non-selected options get deselected..
> 
> Signed-off-by: Cam Hutchison <camh@xdna.net>

Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>

Small comment below...

> ---
>  linux/linux.mk | 12 ++++++------
>  1 file changed, 6 insertions(+), 6 deletions(-)
> 
> diff --git a/linux/linux.mk b/linux/linux.mk
> index 9c2aa77a10..bd5589bae0 100644
> --- a/linux/linux.mk
> +++ b/linux/linux.mk
> @@ -74,11 +74,11 @@ LINUX_DEPENDENCIES += host-lzop
>  else ifeq ($(BR2_LINUX_KERNEL_XZ),y)
>  LINUX_DEPENDENCIES += host-xz
>  endif
> -LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_GZIP) = CONFIG_KERNEL_GZIP
> -LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_LZ4) = CONFIG_KERNEL_LZ4
> -LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_LZMA) = CONFIG_KERNEL_LZMA
> -LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_LZO) = CONFIG_KERNEL_LZO
> -LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_XZ) = CONFIG_KERNEL_XZ
> +LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_GZIP) += CONFIG_KERNEL_GZIP
> +LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_LZ4) += CONFIG_KERNEL_LZ4
> +LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_LZMA) += CONFIG_KERNEL_LZMA
> +LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_LZO) += CONFIG_KERNEL_LZO
> +LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_XZ) += CONFIG_KERNEL_XZ
>  
>  # If host-uboot-tools is selected by the user, assume it is needed to
>  # create a custom image
> @@ -252,7 +252,7 @@ endif
>  define LINUX_KCONFIG_FIXUP_CMDS
>  	$(if $(LINUX_NEEDS_MODULES),
>  		$(call KCONFIG_ENABLE_OPT,CONFIG_MODULES,$(@D)/.config))
> -	$(call KCONFIG_ENABLE_OPT,$(LINUX_COMPRESSION_OPT_y),$(@D)/.config)
> +	$(call KCONFIG_ENABLE_OPT,$(strip $(LINUX_COMPRESSION_OPT_y)),$(@D)/.config)

I think the strip is not needed, because leading spaces in arguments to
a call are anyway stripped.

But it is most systematice to do, so it's fine with me.

Regards,
Yann E. MORIN.

>  	$(foreach opt, $(LINUX_COMPRESSION_OPT_),
>  		$(call KCONFIG_DISABLE_OPT,$(opt),$(@D)/.config)
>  	)
> -- 
> 2.11.0
> 
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