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#
# Copyright (c) 2020 Arm Limited. All rights reserved.
#
# SPDX-License-Identifier: Apache-2.0
#
# Licensed under the Apache License, Version 2.0 (the License); you may
# not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an AS IS BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
function(ethosu_link_options target scope)
cmake_parse_arguments(ARG "" "LINK_FILE" "" ${ARGN})
if (CMAKE_CXX_COMPILER_ID STREQUAL "ARMClang")
set(LINK_FILE_OUT ${CMAKE_CURRENT_SOURCE_DIR}/${ARG_LINK_FILE}.scatter)
set(LINK_FILE_OPTION "--scatter")
elseif (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
set(LINK_FILE ${ARG_LINK_FILE}.ld)
set(LINK_FILE_IN ${CMAKE_CURRENT_SOURCE_DIR}/${LINK_FILE})
set(LINK_FILE_OUT ${CMAKE_CURRENT_BINARY_DIR}/${LINK_FILE})
set(LINK_FILE_OPTION "-T")
set(prop "$<TARGET_PROPERTY:${target},COMPILE_DEFINITIONS>")
add_custom_command(
OUTPUT ${LINK_FILE_OUT}
DEPENDS ${LINK_FILE_IN}
BYPRODUCTS ${LINK_FILE_OUT}
COMMAND ${CMAKE_C_COMPILER} -E -x c -P -o ${LINK_FILE_OUT} ${LINK_FILE_IN}
COMMAND_EXPAND_LISTS "$<$<BOOL:${prop}>:-D$<JOIN:${prop},;-D>>"
COMMENT "Preprocessing and generating linker script"
VERBATIM)
add_custom_target(${target}-linker-script
DEPENDS ${LINK_FILE_OUT}
VERBATIM)
add_dependencies(${target} ${target}-linker-script)
endif()
target_link_options(${target} ${scope} ${LINK_FILE_OPTION} ${LINK_FILE_OUT})
set_target_properties(${target} PROPERTIES LINK_DEPENDS ${LINK_FILE_OUT})
endfunction()
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