pkg-generic: introduce _DL_SUBDIR

This per package variable can be used to specify the download
subdirectory used by that 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.

Signed-off-by: Maxime Hadjinlian <maxime.hadjinlian@gmail.com>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

diff --git a/package/pkg-generic.mk b/package/pkg-generic.mk
index 20ee73d438cc5ba0bfd8421c67b00283a242f1bc..3c6a1839ff15717ccc8b8ef5569fe1e885862fe8 100644 (file)
--- a/package/pkg-generic.mk
+++ b/package/pkg-generic.mk
@@ -432,7 +432,8 @@ endif
 
 $(2)_BASENAME  = $$(if $$($(2)_VERSION),$(1)-$$($(2)_VERSION),$(1))
 $(2)_BASENAME_RAW = $$(if $$($(2)_VERSION),$$($(2)_RAWNAME)-$$($(2)_VERSION),$$($(2)_RAWNAME))
-$(2)_DL_DIR    =  $$(DL_DIR)/$$($(2)_RAWNAME)
+$(2)_DL_SUBDIR ?= $$($(2)_RAWNAME)
+$(2)_DL_DIR = $$(DL_DIR)/$$($(2)_DL_SUBDIR)
 $(2)_DIR       =  $$(BUILD_DIR)/$$($(2)_BASENAME)
 
 ifndef $(2)_SUBDIR