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#----------------------------------------------------------------------------
# Copyright (c) 2021 - 2022 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
#
# http://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.
#----------------------------------------------------------------------------
# specify the cross compiler
set(CMAKE_C_COMPILER armclang)
set(CMAKE_CXX_COMPILER armclang)
set(CMAKE_C_LINKER_PREFERENCE armlink)
set(CMAKE_ASM_LINKER_PREFERENCE armlink)
set(CMAKE_ASM_COMPILER armasm)
set(CMAKE_ASM_COMPILER_AR armar)
set(CMAKE_CROSSCOMPILING true)
set(CMAKE_SYSTEM_NAME Generic)
set(MIN_ARM_CLANG_VERSION 6.16)
# Skip compiler test execution
set(CMAKE_C_COMPILER_WORKS 1)
set(CMAKE_CXX_COMPILER_WORKS 1)
if (NOT DEFINED CMAKE_SYSTEM_PROCESSOR)
set(CMAKE_SYSTEM_PROCESSOR cortex-m55)
endif()
if (CMAKE_SYSTEM_PROCESSOR STREQUAL cortex-m55)
# Flags for cortex-m55
set(CPU_ID M55)
set(CPU_COMPILE_DEF CPU_CORTEX_${CPU_ID})
set(CPU_NAME ${CMAKE_SYSTEM_PROCESSOR})
set(ARM_CPU "ARMC${CPU_ID}")
set(FLOAT_ABI hard)
set(ARM_MATH_DSP 1)
set(ARM_MATH_LOOPUNROLL 1)
set(CPU_HEADER_FILE "${ARM_CPU}.h")
set(CPU_LINK_OPT "--cpu=Cortex-${CPU_ID}")
elseif(CMAKE_SYSTEM_PROCESSOR STREQUAL cortex-m33)
# Flags for cortex-m33 to go here
endif()
set(${CPU_COMPILE_DEF} 1)
# Warning options
add_compile_options(
-Wall
-Wextra
-Wvla)
# General purpose compile options:
add_compile_options(
-funsigned-char
-fno-function-sections
"$<$<COMPILE_LANGUAGE:CXX>:-fno-unwind-tables;-fno-rtti;-fno-exceptions>")
# Arch compile options:
add_compile_options(
-mthumb
-mcpu=${CPU_NAME}
-mfloat-abi=${FLOAT_ABI}
--target=arm-arm-non-eabi
-mlittle-endian
-MD)
# Compile definitions:
add_compile_definitions(
CPU_HEADER_FILE=\"${CPU_HEADER_FILE}\"
$<$<BOOL:${CPU_COMPILE_DEF}>:${CPU_COMPILE_DEF}>
$<$<BOOL:${ARM_MATH_DSP}>:ARM_MATH_DSP>
$<$<BOOL:${ARM_MATH_LOOPUNROLL}>:ARM_MATH_LOOPUNROLL>)
# Link options:
add_link_options(${CPU_LINK_OPT})
set(CMAKE_ASM_FLAGS "${CPU_LINK_OPT}")
# Warnings to be ignored:
# L6314W = No section matches pattern
# L6439W = Multiply defined Global Symbol
add_link_options(
--diag_suppress=L6439W,L6314W
--info sizes,totals,unused,veneers
--strict
--callgraph
--load_addr_map_info
--xref
"$<$<CONFIG:RELEASE>:--no_debug>")
function(configure_semihosting TARGET_NAME SEMIHOSTING)
if (${SEMIHOSTING})
target_compile_definitions(${TARGET_NAME} PUBLIC USE_SEMIHOSTING)
endif()
endfunction()
# Function to add a map file output for the linker to dump diagnostic information to.
function(add_target_map_file TARGET_NAME MAP_FILE_PATH)
target_link_options(${TARGET_NAME} PUBLIC
--map --symbols --list=${MAP_FILE_PATH})
endfunction()
# Function to add linker option to use the chosen linker script (scatter file).
function(add_linker_script TARGET_NAME SCRIPT_DIR SCRIPT_NAME)
set(LINKER_SCRIPT_PATH ${SCRIPT_DIR}/${SCRIPT_NAME}.sct)
if (NOT EXISTS ${LINKER_SCRIPT_PATH})
message(FATAL_ERROR "Scatter file not found: ${LINKER_SCRIPT_PATH}")
endif()
message(STATUS "Using linker script: ${LINKER_SCRIPT_PATH}")
target_link_options(${TARGET_NAME} PUBLIC
--scatter=${LINKER_SCRIPT_PATH})
endfunction()
# Function to set the command to copy/extract contents from an elf
# into a binary file.
function(add_bin_generation_command)
set(multiValueArgs SECTION_PATTERNS OUTPUT_BIN_NAMES)
set(oneValueArgs TARGET_NAME OUTPUT_DIR AXF_PATH)
cmake_parse_arguments(PARSED "" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
add_custom_command(TARGET ${PARSED_TARGET_NAME}
POST_BUILD
COMMAND fromelf --bin --output=${PARSED_OUTPUT_DIR}/
${PARSED_AXF_PATH})
endfunction()
# Function to assert the compiler version
function(enforce_compiler_version)
if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS ${MIN_ARM_CLANG_VERSION})
message( FATAL_ERROR "Arm compiler version must be ${MIN_ARM_CLANG_VERSION} or greater." )
endif()
endfunction()
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