# Copyright 2018 The Hafnium Authors.
#
# Use of this source code is governed by a BSD-style
# license that can be found in the LICENSE file or at
# https://opensource.org/licenses/BSD-3-Clause.

# Configuration of the build toolchain.
declare_args() {
  # The name of the project being built.
  project = "reference"

  # This default path is overriden from the Makefile based on
  # the toolchain_lib arg passed through gn.
  toolchain_lib =
      rebase_path("//prebuilts/linux-x64/clang/lib64/clang/12.0.5/include")

  # Whether to build against the platform for embedded images consisting of
  # include paths and defines. This is also used for host targets that simulate
  # an embedded image.
  use_platform = false

  # Whether assertions are included in the build, this is overriden from the Makefile
  # based on the enable_assertions arg passed through gn
  enable_assertions = 1
}

# Check that we support the attempted build.
assert(host_os == "linux", "Only linux builds are currently supported.")

# Setup the standard variables.
if (target_os == "") {
  target_os = host_os
}
if (target_cpu == "") {
  target_cpu = host_cpu
}
if (current_os == "") {
  current_os = target_os
}
if (current_cpu == "") {
  current_cpu = target_cpu
}

assert(target_os == host_os, "Cross compiles not yet supported.")
assert(target_cpu == host_cpu, "Cross compiles not yet supported.")

# All binary targets will get this list of configs by default.
_shared_binary_target_configs = [ "//build:compiler_defaults" ]

# If it's not building a host utility, it's building against the platform so apply the configuration.
if (use_platform) {
  _shared_binary_target_configs += [ "//build:platform" ]
}

# Apply that default list to the binary target types.
set_defaults("executable") {
  configs = _shared_binary_target_configs
}
set_defaults("static_library") {
  configs = _shared_binary_target_configs
}
set_defaults("shared_library") {
  configs = _shared_binary_target_configs
}
set_defaults("source_set") {
  configs = _shared_binary_target_configs
}

# The default toolchain is the target toolchain for building utilities and tests.
set_default_toolchain("//build/toolchain:host_clang")