1# Copyright 2021 The Pigweed Authors 2# 3# Licensed under the Apache License, Version 2.0 (the "License"); you may not 4# use this file except in compliance with the License. You may obtain a copy of 5# the License at 6# 7# https://www.apache.org/licenses/LICENSE-2.0 8# 9# Unless required by applicable law or agreed to in writing, software 10# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 11# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 12# License for the specific language governing permissions and limitations under 13# the License. 14 15import("//build_overrides/pigweed.gni") 16 17import("clang_config.gni") 18 19cortex_m_common_flags = [ 20 "-mabi=aapcs", 21 "-mthumb", 22] 23 24cortex_m_software_fpu_flags = [ "-mfloat-abi=soft" ] 25 26cortex_m_hardware_fpu_flags = [ 27 "-mfloat-abi=hard", 28 "-mfpu=fpv4-sp-d16", 29 30 # Used by some pigweed tests/targets to correctly handle hardware FPU 31 # behavior. 32 "-DPW_ARMV7M_ENABLE_FPU=1", 33] 34 35config("enable_float_printf") { 36 ldflags = [ "-Wl,-u_printf_float" ] 37} 38 39pw_clang_arm_config("cortex_m3") { 40 cflags = [ "-mcpu=cortex-m3" ] 41 cflags += cortex_m_common_flags 42 cflags += cortex_m_software_fpu_flags 43 asmflags = cflags 44 ldflags = cflags 45} 46 47pw_clang_arm_config("cortex_m4f") { 48 cflags = [ "-mcpu=cortex-m4" ] 49 cflags += cortex_m_common_flags 50 cflags += cortex_m_hardware_fpu_flags 51 asmflags = cflags 52 ldflags = cflags 53} 54