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#
# Copyright (c) 2020-2021 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.
#
set(TARGET_CPU "cortex-m4" CACHE STRING "Target CPU")
set(CMAKE_SYSTEM_NAME Generic)
set(CMAKE_C_COMPILER "arm-none-eabi-gcc")
set(CMAKE_ASM_COMPILER "arm-none-eabi-gcc")
set(CMAKE_CXX_COMPILER "arm-none-eabi-g++")
# Convert TARGET_CPU=Cortex-M33+nofp+nodsp into
# - CMAKE_SYSTEM_PROCESSOR=cortex-m33
# - TARGET_CPU_FEATURES=no-fp;no-dsp
string(REPLACE "+" ";" TARGET_CPU_FEATURES ${TARGET_CPU})
list(POP_FRONT TARGET_CPU_FEATURES CMAKE_SYSTEM_PROCESSOR)
string(TOLOWER ${CMAKE_SYSTEM_PROCESSOR} CMAKE_SYSTEM_PROCESSOR)
set(CMAKE_EXECUTABLE_SUFFIX ".elf")
set(CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY)
set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
# Select C/C++ version
set(CMAKE_C_STANDARD 99)
set(CMAKE_CXX_STANDARD 14)
# Compile options
add_compile_options(
-mcpu=${TARGET_CPU}
-mthumb
"$<$<CONFIG:DEBUG>:-gdwarf-3>"
"$<$<COMPILE_LANGUAGE:CXX>:-fno-unwind-tables;-fno-rtti;-fno-exceptions>")
# Compile defines
add_compile_definitions(
"$<$<NOT:$<CONFIG:DEBUG>>:NDEBUG>")
# Link options
add_link_options(
-mcpu=${TARGET_CPU}
-mthumb
--specs=nosys.specs)
# Set floating point unit
if("${TARGET_CPU}" MATCHES "\\+fp")
set(FLOAT hard)
elseif("${TARGET_CPU}" MATCHES "\\+nofp")
set(FLOAT soft)
elseif("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "cortex-m33" OR
"${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "cortex-m55")
set(FLOAT hard)
else()
set(FLOAT soft)
endif()
if (FLOAT)
add_compile_options(-mfloat-abi=${FLOAT})
add_link_options(-mfloat-abi=${FLOAT})
endif()
# Compilation warnings
add_compile_options(
-Wall
-Wextra
-Wsign-compare
-Wunused
-Wswitch-default
-Wformat
-Wdouble-promotion
-Wredundant-decls
-Wshadow
-Wcast-align
-Wnull-dereference
-Wno-format-extra-args
-Wno-unused-function
-Wno-unused-parameter
-Wno-unused-label
-Wno-missing-field-initializers
-Wno-return-type)
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