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#
# Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
#
# SPDX-License-Identifier: BSD-3-Clause
#
################################################################################
# Helpers for finding and referencing platform directories
################################################################################
ifndef PLAT_HELPERS_MK
PLAT_HELPERS_MK := $(lastword $(MAKEFILE_LIST))
ifeq (${PLAT},)
$(error "Error: Unknown platform. Please use PLAT=<platform name> to specify the platform")
endif
# TF_PLATFORM_ROOT can be overridden for when building tools directly
TF_PLATFORM_ROOT ?= plat/
PLAT_MAKEFILE := platform.mk
# Generate the platforms list by recursively searching for all directories
# under /plat containing a PLAT_MAKEFILE. Append each platform with a `|`
# char and strip out the final '|'.
ALL_PLATFORM_MK_FILES := $(call rwildcard,${TF_PLATFORM_ROOT},${PLAT_MAKEFILE})
ALL_PLATFORM_DIRS := $(patsubst %/,%,$(dir ${ALL_PLATFORM_MK_FILES}))
ALL_PLATFORMS := $(sort $(notdir ${ALL_PLATFORM_DIRS}))
PLAT_MAKEFILE_FULL := $(filter %/${PLAT}/${PLAT_MAKEFILE},${ALL_PLATFORM_MK_FILES})
PLATFORM_LIST := $(subst ${space},|,${ALL_PLATFORMS})
ifeq ($(PLAT_MAKEFILE_FULL),)
$(error "Error: Invalid platform. The following platforms are available: ${PLATFORM_LIST}")
endif
# Record the directory where the platform make file was found.
PLAT_DIR := $(dir ${PLAT_MAKEFILE_FULL})
endif
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