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