[Buildroot] [PATCH 1/1] merge_config.sh: add br2-external support

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

Ilya, All,

On 2017-12-28 18:09 +0300, Ilya Kuzmich spake thusly:
> Pass BR2_EXTERNAL value via -e option.
> This will prevent merge_config.sh from silently eating any symbols defined in
> external trees on a clean buildroot tree invocation.
> 
> Signed-off-by: Ilya Kuzmich <ilya.kuzmich@gmail.com>
> ---
>  support/kconfig/merge_config.sh | 13 ++++++++++++-
>  1 file changed, 12 insertions(+), 1 deletion(-)
> 
> diff --git a/support/kconfig/merge_config.sh b/support/kconfig/merge_config.sh
> index 8a1708b..f52318a 100755
> --- a/support/kconfig/merge_config.sh
> +++ b/support/kconfig/merge_config.sh
> @@ -33,6 +33,7 @@ usage() {
>  	echo "  -n    use allnoconfig instead of alldefconfig"
>  	echo "  -r    list redundant entries when merging fragments"
>  	echo "  -O    dir to put generated output files"
> +	echo "  -e    br external tree"

So, this is not only about one tree, since we also support mutiple
trees, so:

    -e    colon-separated list of br2-external trees to use (optional)

>  }
>  
>  MAKE=true
> @@ -71,6 +72,11 @@ while true; do
>  		shift 2
>  		continue
>  		;;
> +	"-e")
> +		EXTERNAL=$2
> +		shift 2
> +		continue
> +		;;
>  	*)
>  		break
>  		;;
> @@ -127,11 +133,16 @@ if [ "$OUTPUT" != "." ] ; then
>  	OUTPUT_ARG="O=$OUTPUT"
>  fi
>  
> +EXTERNAL_ARG=""
> +if [ "$EXTERNAL" ] ; then
> +    EXTERNAL_ARG="BR2_EXTERNAL=$EXTERNAL"
> +fi

Why don't you simply handle that in the case statement, above?

    "-e")
        EXTERNAL_ARG="BR2_EXTERNAL=$2"
        shift 2
        continue
        ;;

And that all. And no need to explicitly set it to empty first.

Regards,
Yann E. MORIN.

>  
>  # Use the merged file as the starting point for:
>  # alldefconfig: Fills in any missing symbols with Kconfig default
>  # allnoconfig: Fills in any missing symbols with # CONFIG_* is not set
> -make KCONFIG_ALLCONFIG=$TMP_FILE $OUTPUT_ARG $ALLTARGET
> +make KCONFIG_ALLCONFIG=$TMP_FILE $EXTERNAL_ARG $OUTPUT_ARG $ALLTARGET
>  
>  
>  # Check all specified config values took (might have missed-dependency issues)
> -- 
> 2.7.4
> 
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> buildroot at busybox.net
> http://lists.busybox.net/mailman/listinfo/buildroot

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