pw_build/BUILD.gn

# Copyright 2019 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.

# Standard compiler flags to reduce output binary size.
config("reduced_size") {
  cflags = [
    "-fno-common",
    "-fno-exceptions",
    "-ffunction-sections",
    "-fdata-sections",
  ]
  cflags_cc = [ "-fno-rtti" ]
}

config("strict_warnings") {
  cflags = [
    "-Wall",
    "-Wextra",

    # Make all warnings errors, except for the exemptions below.
    "-Werror",
    "-Wno-error=cpp",  # preprocessor #warning statement
    "-Wno-error=deprecated-declarations",  # [[deprecated]] attribute
  ]
}

config("cpp17") {
  cflags_cc = [
    "-std=c++17",

    # Allow uses of the register keyword, which may appear in C headers.
    "-Wno-register",
  ]
}

# Default C++ version for Pigweed modules.
config("pw_default_cpp") {
  configs = [ ":cpp17" ]
}