[Buildroot] [v3 09/13] pkg-generic: introduce _SAME_SOURCE_AS

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

On 2018-03-31 16:24 +0200, Maxime Hadjinlian spake thusly:
> This per package variable can be used to specify that a package shares
> the same sources as another package.
> 
> The use case here is for example linux-headers and linux, which share
> the same sources (because they are the same upstream project), so we
> don't want to download twice the kernel, nor store it multiple times
> either.
> 
> Make will automatically try to help by introducing leading and trailing
> spaces when replacing a line-continuation '\', so we need to call
> $(strip) on the variable.
> 
> Signed-off-by: Maxime Hadjinlian <maxime.hadjinlian@gmail.com>
> ---
>  package/pkg-generic.mk | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/package/pkg-generic.mk b/package/pkg-generic.mk
> index b1342228c8..f3829e9912 100644
> --- a/package/pkg-generic.mk
> +++ b/package/pkg-generic.mk
> @@ -428,7 +428,9 @@ endif
>  
>  $(2)_BASE_NAME	= $$(if $$($(2)_VERSION),$(1)-$$($(2)_VERSION),$(1))
>  $(2)_RAW_BASE_NAME = $$(if $$($(2)_VERSION),$$($(2)_RAWNAME)-$$($(2)_VERSION),$$($(2)_RAWNAME))
> -$(2)_DL_DIR 	=  $$(DL_DIR)/$$($(2)_RAWNAME)
> +$(2)_DL_DIR	= $$(strip $$(if $$($(2)_SAME_SOURCE_AS), \
> +        $$($$(call UPPERCASE,$$($(2)_SAME_SOURCE_AS))_DL_DIR), \
> +        $$(DL_DIR)/$$($(2)_RAWNAME)))

Indentation with TABs, please.

May I suggest an alternate indentation (spaces here for easy display):

$(2)_DL_DIR = $$(strip $$(if $$($(2)_SAME_SOURCE_AS), \
                                $$($$(call UPPERCASE,$$($(2)_SAME_SOURCE_AS))_DL_DIR), \
                                $$(DL_DIR)/$$($(2)_RAWNAME)) \
                )

Regards,
Yann E. MORIN.

>  $(2)_DIR	=  $$(BUILD_DIR)/$$($(2)_BASE_NAME)
>  
>  ifndef $(2)_SUBDIR
> -- 
> 2.16.2
> 

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