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#
# Copyright (c) 2020-2022 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
#
# 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")
string(TOLOWER ${TARGET_CPU} CMAKE_SYSTEM_PROCESSOR)
set(CMAKE_SYSTEM_NAME Generic)
set(CMAKE_C_COMPILER "arm-none-eabi-gcc")
set(CMAKE_CXX_COMPILER "arm-none-eabi-g++")
set(CMAKE_ASM_COMPILER "arm-none-eabi-gcc")
set(CMAKE_LINKER "arm-none-eabi-ld")
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 11)
set(CMAKE_CXX_STANDARD 14)
set(GCC_CPU ${CMAKE_SYSTEM_PROCESSOR})
string(REPLACE "cortex-m85" "cortex-m55" GCC_CPU ${GCC_CPU})
# Compile options
add_compile_options(
-mcpu=${GCC_CPU}
-mthumb
"$<$<CONFIG:DEBUG>:-gdwarf-3>"
"$<$<COMPILE_LANGUAGE:CXX>:-fno-unwind-tables;-fno-rtti;-fno-exceptions>"
-fdata-sections
-ffunction-sections)
# Compile defines
add_compile_definitions(
"$<$<NOT:$<CONFIG:DEBUG>>:NDEBUG>")
# Link options
add_link_options(
-mcpu=${GCC_CPU}
-mthumb
--specs=nosys.specs)
# Set floating point unit
if(CMAKE_SYSTEM_PROCESSOR MATCHES "\\+fp")
set(FLOAT hard)
elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "\\+nofp")
set(FLOAT soft)
elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "cortex-m33(\\+|$)" OR
CMAKE_SYSTEM_PROCESSOR MATCHES "cortex-m55(\\+|$)" OR
CMAKE_SYSTEM_PROCESSOR MATCHES "cortex-m85(\\+|$)")
set(FLOAT hard)
elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "cortex-m4(\\+|$)" OR
CMAKE_SYSTEM_PROCESSOR MATCHES "cortex-m7(\\+|$)")
set(FLOAT hard)
set(FPU_CONFIG "fpv4-sp-d16")
add_compile_options(-mfpu=${FPU_CONFIG})
add_link_options(-mfpu=${FPU_CONFIG})
else()
set(FLOAT soft)
endif()
if (FLOAT)
add_compile_options(-mfloat-abi=${FLOAT})
add_link_options(-mfloat-abi=${FLOAT})
endif()
add_link_options(LINKER:--nmagic,--gc-sections)
# Compilation warnings
add_compile_options(
-Wall
-Wextra
-Wcast-align
-Wdouble-promotion
-Wformat
-Wmissing-field-initializers
-Wnull-dereference
-Wredundant-decls
-Wshadow
-Wswitch
-Wswitch-default
-Wunused
-Wno-redundant-decls
-Wno-psabi
)
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