toolchain/external: use generic extract commands (!blackfin case)

Now that packages can provide a list of files to be excluded when
extracting their archive, downloaded external toolchains are no longer
special in this respect.

Still, those toolchains are currently extracted directly into their
final location, $(HOST_DIR)/opt/ext-toolchain/ which means we still
need a custom extract command.

Except, we don't really need it: we can just move the toolchain, after
it's been extracted by the generic extract command, with a post-extract
hook.

This means that:

  - we now extract the toolchain with the generic extract command,

  - the toolchain is thus extracted into $(@D) ,

  - fixup commands are run against $(@D), as a post-extract hook,
    instead of against $(HOST_DIR)/opt/ext-toolchain ,

  - once this is done, we move $(@D)/* into the final location with a
    new post-extract hook.

Note: the blackfin case is special, and will be handled in a follow-up
patch.

[Thomas: register the TOOLCHAIN_EXTERNAL_FIXUP_CMDS only for the Arago
case, add some additional comments in the code about why we're moving
the toolchain around.]

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
Reviewed-by: Romain Naour <romain.naour@openwide.fr>
Reviewed-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
Tested-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

toolchain/toolchain-external/toolchain-external.mk

@@ -300,17 +300,19 @@ TOOLCHAIN_EXTERNAL_SITE = http://software-dl.ti.com/sdoemb/sdoemb_public_sw/arag
 TOOLCHAIN_EXTERNAL_SOURCE = arago-2011.09-armv7a-linux-gnueabi-sdk.tar.bz2
 TOOLCHAIN_EXTERNAL_ACTUAL_SOURCE_TARBALL = arago-toolchain-2011.09-sources.tar.bz2
 define TOOLCHAIN_EXTERNAL_FIXUP_CMDS
-	mv $(TOOLCHAIN_EXTERNAL_INSTALL_DIR)/arago-2011.09/armv7a/* $(TOOLCHAIN_EXTERNAL_INSTALL_DIR)/
-	rm -rf $(TOOLCHAIN_EXTERNAL_INSTALL_DIR)/arago-2011.09/
+	mv $(@D)/arago-2011.09/armv7a/* $(@D)/
+	rm -rf $(@D)/arago-2011.09/
 endef
+TOOLCHAIN_EXTERNAL_POST_EXTRACT_HOOKS += TOOLCHAIN_EXTERNAL_FIXUP_CMDS
 else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_ARAGO_ARMV5TE_201109),y)
 TOOLCHAIN_EXTERNAL_SITE = http://software-dl.ti.com/sdoemb/sdoemb_public_sw/arago_toolchain/2011_09/exports
 TOOLCHAIN_EXTERNAL_SOURCE = arago-2011.09-armv5te-linux-gnueabi-sdk.tar.bz2
 TOOLCHAIN_EXTERNAL_ACTUAL_SOURCE_TARBALL = arago-toolchain-2011.09-sources.tar.bz2
 define TOOLCHAIN_EXTERNAL_FIXUP_CMDS
-	mv $(TOOLCHAIN_EXTERNAL_INSTALL_DIR)/arago-2011.09/armv5te/* $(TOOLCHAIN_EXTERNAL_INSTALL_DIR)/
-	rm -rf $(TOOLCHAIN_EXTERNAL_INSTALL_DIR)/arago-2011.09/
+	mv $(@D)/arago-2011.09/armv5te/* $(@D)/
+	rm -rf $(@D)/arago-2011.09/
 endef
+TOOLCHAIN_EXTERNAL_POST_EXTRACT_HOOKS += TOOLCHAIN_EXTERNAL_FIXUP_CMDS
 else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_LINARO_ARM),y)
 ifeq ($(HOSTARCH),x86)
 TOOLCHAIN_EXTERNAL_SITE = http://releases.linaro.org/14.09/components/toolchain/binaries
@@ -474,12 +476,17 @@ define TOOLCHAIN_EXTERNAL_EXTRACT_CMDS
 endef
 else ifneq ($(TOOLCHAIN_EXTERNAL_SOURCE),)
 # Normal handling of toolchain tarball extraction.
-define TOOLCHAIN_EXTERNAL_EXTRACT_CMDS
+TOOLCHAIN_EXTERNAL_EXCLUDES = usr/lib/locale/*
+
+# As a regular package, the toolchain gets extracted in $(@D), but
+# since it's actually a fairly special package, we need it to be moved
+# into TOOLCHAIN_EXTERNAL_INSTALL_DIR.
+define TOOLCHAIN_EXTERNAL_MOVE
 	mkdir -p $(TOOLCHAIN_EXTERNAL_INSTALL_DIR)
-	$(call suitable-extractor,$(TOOLCHAIN_EXTERNAL_SOURCE)) $(DL_DIR)/$(TOOLCHAIN_EXTERNAL_SOURCE) | \
-		$(TAR) --strip-components=1 --exclude='usr/lib/locale/*' -C $(TOOLCHAIN_EXTERNAL_INSTALL_DIR) $(TAR_OPTIONS) -
-	$(TOOLCHAIN_EXTERNAL_FIXUP_CMDS)
+	mv $(@D)/* $(TOOLCHAIN_EXTERNAL_INSTALL_DIR)/
 endef
+TOOLCHAIN_EXTERNAL_POST_EXTRACT_HOOKS += \
+	TOOLCHAIN_EXTERNAL_MOVE
 endif
 
 # Returns the location of the libc.a file for the given compiler + flags