package/pkg-cargo: provide a single definition of CARGO_HOME value

Instead of replicating $(HOST_DIR)/share/cargo in several place,
define BR_CARGO_HOME. This will help when we'll want to change this
location.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/pkg-cargo.mk

@@ -20,8 +20,10 @@
 #
 ################################################################################
 
+BR_CARGO_HOME = $(HOST_DIR)/share/cargo
+
 PKG_COMMON_CARGO_ENV = \
-	CARGO_HOME=$(HOST_DIR)/share/cargo
+	CARGO_HOME=$(BR_CARGO_HOME)
 
 # __CARGO_TEST_CHANNEL_OVERRIDE_DO_NOT_USE_THIS is needed to allow
 # passing the -Z target-applies-to-host, which is needed together with
@@ -79,7 +81,7 @@ $(2)_DOWNLOAD_DEPENDENCIES += host-rustc
 $(2)_DEPENDENCIES += host-rustc
 
 $(2)_DOWNLOAD_POST_PROCESS = cargo
-$(2)_DL_ENV += CARGO_HOME=$$(HOST_DIR)/share/cargo
+$(2)_DL_ENV += CARGO_HOME=$$(BR_CARGO_HOME)
 
 # If building in a sub directory, use that to find the Cargo.toml
 ifneq ($$($(2)_SUBDIR),)

package/suricata/suricata.mk

@@ -29,7 +29,7 @@ SURICATA_DEPENDENCIES = \
 
 SURICATA_CONF_ENV = \
 	ac_cv_path_HAVE_SPHINXBUILD=no \
-	CARGO_HOME=$(HOST_DIR)/share/cargo \
+	CARGO_HOME=$(BR_CARGO_HOME) \
 	RUST_TARGET=$(RUSTC_TARGET_NAME)
 
 SURICATA_CONF_OPTS = \