Merge from bittboy/buildroot@db180c0

arch/arch.mk.xtensa

@@ -0,0 +1,36 @@
+################################################################################
+# This variable can be used by packages that need to extract the overlay.
+#
+# ARCH_XTENSA_OVERLAY_FILE is the path to the overlay tarball; empty if not
+#                          using any overlay
+#
+# Example:
+#   ifneq ($(ARCH_XTENSA_OVERLAY_FILE),)
+#       tar xf $(ARCH_XTENSA_OVERLAY_FILE) -C $(@D) --strip-components=1 gcc
+#   endif
+################################################################################
+BR_ARCH_XTENSA_OVERLAY_FILE = $(call qstrip,$(BR2_XTENSA_OVERLAY_FILE))
+ifneq ($(filter http://% https://% ftp://% scp://%,$(BR_ARCH_XTENSA_OVERLAY_FILE)),)
+ARCH_XTENSA_OVERLAY_URL = $(BR_ARCH_XTENSA_OVERLAY_FILE)
+ARCH_XTENSA_OVERLAY_FILE = $($(PKG)_DL_DIR)/$(notdir $(BR_ARCH_XTENSA_OVERLAY_FILE))
+# Do not check that file, we can't know its hash
+BR_NO_CHECK_HASH_FOR += $(notdir $(ARCH_XTENSA_OVERLAY_URL))
+else
+ARCH_XTENSA_OVERLAY_FILE = $(BR_ARCH_XTENSA_OVERLAY_FILE)
+endif
+
+################################################################################
+# arch-xtensa-overlay-extract -- extract an extensa overlay
+#
+# argument 1 is the path in which to extract
+# argument 2 is the component to extract, one of: gcc, binutils, gdb, linux,
+#            u-boot
+#
+# Example:
+#   $(call arch-xtensa-overlay-extract,/path/to/overlay.tar,$(@D),gcc)
+################################################################################
+define arch-xtensa-overlay-extract
+	$(call suitable-extractor,$(ARCH_XTENSA_OVERLAY_FILE)) \
+		$(ARCH_XTENSA_OVERLAY_FILE) | \
+	$(TAR) --strip-components=1 -C $(1) $(TAR_OPTIONS) - $(2)
+endef