You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
83 lines
2.7 KiB
83 lines
2.7 KiB
# 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.
|
|
|
|
_script_path = rebase_path("../py/pw_toolchain/clang_arm_toolchain.py")
|
|
|
|
# This template generates a config that can be used to target ARM cores using
|
|
# a clang compiler.
|
|
#
|
|
# Clang isn't a plug-and-play experience for Cortex-M baremetal targets; it's
|
|
# missing C runtime libraries, C/C++ standard libraries, and a few other
|
|
# things. This template uses the provided cflags, asmflags, ldflags, etc. to
|
|
# generate a config that pulls the missing components from an arm-none-eabi-gcc
|
|
# compiler on the system PATH. The end result is a clang-based compiler that
|
|
# pulls in gcc-provided headers and libraries to complete the toolchain.
|
|
#
|
|
# Args:
|
|
# - asmflags, cflags, cflags_c, cflags_cc, ldflags: These flags are used to
|
|
# locate the correct architecture-specific libraries/headers. To
|
|
# properly drive the script, provide all architecture flags (e.g. -mcpu,
|
|
# -mabi, -mthumb, -mfloat-abi, -mfpu) in at least one of these
|
|
# variables.
|
|
#
|
|
# Generated targets:
|
|
# - $target_name: The final config to use with your clang toolchain.
|
|
template("pw_clang_arm_config") {
|
|
config(target_name) {
|
|
# Pull all the compiler flags into a single list.
|
|
_compiler_flags = []
|
|
forward_variables_from(invoker, "*")
|
|
if (defined(asmflags)) {
|
|
_compiler_flags += asmflags
|
|
} else {
|
|
asmflags = []
|
|
}
|
|
if (defined(cflags)) {
|
|
_compiler_flags += cflags
|
|
} else {
|
|
cflags = []
|
|
}
|
|
if (defined(cflags_c)) {
|
|
_compiler_flags += cflags_c
|
|
} else {
|
|
cflags_c = []
|
|
}
|
|
if (defined(cflags_cc)) {
|
|
_compiler_flags += cflags_cc
|
|
} else {
|
|
cflags_cc = []
|
|
}
|
|
if (defined(ldflags)) {
|
|
_compiler_flags += ldflags
|
|
} else {
|
|
ldflags = []
|
|
}
|
|
|
|
# Invoke the script that will generate clang flags based on the current
|
|
# compiler version and desired arch.
|
|
_script_flags = [
|
|
"--gn-scope",
|
|
"--cflags",
|
|
"--ldflags",
|
|
"--",
|
|
]
|
|
_script_flags += _compiler_flags
|
|
_arm_flags = exec_script(_script_path, _script_flags, "scope")
|
|
|
|
cflags += _arm_flags.cflags
|
|
ldflags += _arm_flags.cflags
|
|
ldflags += _arm_flags.ldflags
|
|
}
|
|
}
|