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ifneq ($(filter xtensa%,$(ARCH)),)
#############################################################
#
# Xtensa processor architecture (including Diamond Standard cores)
#
#############################################################
# The following defines a function to be used like this:
# $(call XTENSA_PATCH, <module>, <patchdir>, <relative dir list...>)
# which returns the first overlay patch file for <module> found
# in the list of directories <relative dir list...> which are
# relative to <patchdir> (itself either absolute or relative to the
# current directory). The returned filename is relative to <patchdir>.
# For example:
# $(call XTENSA_PATCH, binutils, some/dir/path, . ..)
# (no commas between directory paths in the list).
#
# A selected overlay patch must exist ("fsf" means no specific
# overlay is selected). So the function emits a Makefile error
# if a selected patch file is not found.
XTENSA_CORENAME:=$(call qstrip,$(BR2_xtensa_core_name))
ifeq ($(XTENSA_CORENAME),fsf)
XTENSA_PATCH =
else
XTENSA_PATCH_SUFFIX = $(1)-xtensa_$(XTENSA_CORENAME).tgz
XTENSA_PATCH_FILE = $(firstword $(wildcard $(patsubst %,$(2)/%/*$(XTENSA_PATCH_SUFFIX),$(3))))
# FULLPATH = $(if $(filter /%,$(1)),$(1),$(PWD)/$(1))
XTENSA_PATCH = $(if $(XTENSA_PATCH_FILE),$(patsubst $(2)/%,%,$(XTENSA_PATCH_FILE)),\
$(error Missing $(1) patch for Xtensa $(XTENSA_CORENAME) processor (*$(XTENSA_PATCH_SUFFIX) in $(addprefix $(2)/,$(3)))))
endif
endif
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