third_party/lwip/BUILD.gn

# Copyright (c) 2020 Project CHIP 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
#
# http://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/chip.gni")

# Re-export the Matter lwip integration as "lwip"
#
# To depend on lwip while keeping the implementation target
# encapsulated:
#
# import("//build_overrides/lwip.gni")
#
# source_set("foo") {
#   public_deps = [
#      "${lwip_root}:lwip",
#      ...
#   ]
# }
#
# and set up the build_overrides appropriately (a typical lwip_root
# would be //third_party/lwip).
#
# To help define the library, a reusable template is provided as
# lwip_target() in third_party/lwip/lwip.gni. Example usage:
#
# //example/lwip/BUILD.gn:
#
#  config("lwip_config") {
#    include_dirs = [ "include" ]
#  }
#
#  lwip_target("lwip") {
#    public = [
#      "include/lwipopts.h"
#    ]
#
#    sources = [ "sys_arch.c" ]
#
#    public_configs = [
#      ":lwip_config",
#    ]
#  }
#
# Then set lwip_root = "//example/lwip" in build_overrides (or,
# if declared as an argument in build_overrides, via args).
#
# Defining the library directly works too.
#
# If there's no include paths to add, defines to set, sources to
# compile, or libraries to link, then an empty group target suffices.
group("lwip") {
  public_deps = [ "${chip_root}/src/lwip:lwip" ]
}