[Buildroot] [PATCH 10/13] pkg-generic: introduce _SAME_SOURCE_AS

[Maxime Hadjinlian]

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, you have linux-headers and linux, you
don't want to download twice the kernel (because of the introduction of
the subdirs in DL_DIR).

So you want to specify in linux-headers, this variable, so it will use
the linux's source.

Signed-off-by: Maxime Hadjinlian <maxime.hadjinlian at 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 7364551471..a8e0686068 100644
--- a/package/pkg-generic.mk
+++ b/package/pkg-generic.mk
@@ -434,7 +434,9 @@ 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 	=  $$(if $$($(2)_SAME_SOURCE_AS), \
+	$$(DL_DIR)/$$($$(call UPPERCASE,$$($(2)_SAME_SOURCE_AS))_RAWNAME), \
+	$$(DL_DIR)/$$($(2)_RAWNAME))
 $(2)_DIR	=  $$(BUILD_DIR)/$$($(2)_BASE_NAME)
 
 ifndef $(2)_SUBDIR
-- 
2.13.2