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# Copyright 2021 The Pigweed Authors
#
# 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
#
# https://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.
import("//build_overrides/pigweed.gni")
import("clang_config.gni")
cortex_m_common_flags = [
"-mabi=aapcs",
"-mthumb",
]
cortex_m_software_fpu_flags = [ "-mfloat-abi=soft" ]
cortex_m_hardware_fpu_flags_common = [
"-mfloat-abi=hard",
# Used by some pigweed tests/targets to correctly handle hardware FPU
# behavior.
"-DPW_ARMV7M_ENABLE_FPU=1",
]
cortex_m_hardware_fpu_flags =
cortex_m_hardware_fpu_flags_common + [ "-mfpu=fpv4-sp-d16" ]
cortex_m_hardware_fpu_v5_flags =
cortex_m_hardware_fpu_flags_common + [ "-mfpu=fpv5-d16" ]
cortex_m_hardware_fpu_v5_sp_flags =
cortex_m_hardware_fpu_flags_common + [ "-mfpu=fpv5-sp-d16" ]
# Default config added to all the ARM cortex M targets to link `nosys` library.
config("nosys") {
# TODO(prabhukr): libs = ["nosys"] did not work as expected (pwrev/133110).
ldflags = [ "-lnosys" ]
}
config("enable_float_printf") {
ldflags = [ "-Wl,-u_printf_float" ]
}
pw_clang_arm_config("cortex_m0plus") {
cflags = [ "-mcpu=cortex-m0plus" ]
cflags += cortex_m_common_flags
cflags += cortex_m_software_fpu_flags
asmflags = cflags
ldflags = cflags
}
pw_clang_arm_config("cortex_m3") {
cflags = [ "-mcpu=cortex-m3" ]
cflags += cortex_m_common_flags
cflags += cortex_m_software_fpu_flags
asmflags = cflags
ldflags = cflags
}
pw_clang_arm_config("cortex_m4") {
cflags = [ "-mcpu=cortex-m4" ]
cflags += cortex_m_common_flags
cflags += cortex_m_software_fpu_flags
asmflags = cflags
ldflags = cflags
}
pw_clang_arm_config("cortex_m4f") {
cflags = [ "-mcpu=cortex-m4" ]
cflags += cortex_m_common_flags
cflags += cortex_m_hardware_fpu_flags
asmflags = cflags
ldflags = cflags
}
pw_clang_arm_config("cortex_m7") {
cflags = [ "-mcpu=cortex-m7" ]
cflags += cortex_m_common_flags
cflags += cortex_m_software_fpu_flags
asmflags = cflags
ldflags = cflags
}
pw_clang_arm_config("cortex_m7f") {
cflags = [ "-mcpu=cortex-m7" ]
cflags += cortex_m_common_flags
cflags += cortex_m_hardware_fpu_v5_flags
asmflags = cflags
ldflags = cflags
}
pw_clang_arm_config("cortex_m33") {
cflags = [ "-mcpu=cortex-m33" ]
cflags += cortex_m_common_flags
cflags += cortex_m_software_fpu_flags
asmflags = cflags
ldflags = cflags
}
pw_clang_arm_config("cortex_m33f") {
cflags = [ "-mcpu=cortex-m33" ]
cflags += cortex_m_common_flags
cflags += cortex_m_hardware_fpu_v5_sp_flags
asmflags = cflags
ldflags = cflags
}
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