# 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.

import("//build_overrides/pigweed.gni")

# Specifies the tools used by host Clang toolchains.
_arm_clang_toolchain = {
  # Note: On macOS, there is no "llvm-ar", only "ar", which happens to be LLVM
  # ar. This should get updated for linux systems.
  ar = "ar"
  cc = "clang"
  cxx = "clang++"

  link_whole_archive = true
}

# Configs specific to different architectures.
_cortex_m3 = [ "$dir_pw_toolchain/arm_clang:cortex_m3" ]

_cortex_m4 = [ "$dir_pw_toolchain/arm_clang:cortex_m4" ]

_cortex_m4f = [ "$dir_pw_toolchain/arm_clang:cortex_m4f" ]

# Describes ARM clang toolchains for specific targets.
pw_toolchain_arm_clang = {
  cortex_m3_debug = {
    name = "arm_clang_cortex_m3_debug"
    forward_variables_from(_arm_clang_toolchain, "*")
    defaults = {
      default_configs = _cortex_m3 + [ "$dir_pw_build:optimize_debugging" ]
    }
  }
  cortex_m3_speed_optimized = {
    name = "arm_clang_cortex_m3_speed_optimized"
    forward_variables_from(_arm_clang_toolchain, "*")
    defaults = {
      default_configs = _cortex_m3 + [ "$dir_pw_build:optimize_speed" ]
    }
  }
  cortex_m3_size_optimized = {
    name = "arm_clang_cortex_m3_size_optimized"
    forward_variables_from(_arm_clang_toolchain, "*")
    defaults = {
      default_configs = _cortex_m3 + [ "$dir_pw_build:optimize_size" ]
    }
  }
  cortex_m4_debug = {
    name = "arm_clang_cortex_m4_debug"
    forward_variables_from(_arm_clang_toolchain, "*")
    defaults = {
      default_configs = _cortex_m4 + [ "$dir_pw_build:optimize_debugging" ]
    }
  }
  cortex_m4_speed_optimized = {
    name = "arm_clang_cortex_m4_speed_optimized"
    forward_variables_from(_arm_clang_toolchain, "*")
    defaults = {
      default_configs = _cortex_m4 + [ "$dir_pw_build:optimize_speed" ]
    }
  }
  cortex_m4_size_optimized = {
    name = "arm_clang_cortex_m4_size_optimized"
    forward_variables_from(_arm_clang_toolchain, "*")
    defaults = {
      default_configs = _cortex_m4 + [ "$dir_pw_build:optimize_size" ]
    }
  }
  cortex_m4f_debug = {
    name = "arm_clang_cortex_m4f_debug"
    forward_variables_from(_arm_clang_toolchain, "*")
    defaults = {
      default_configs = _cortex_m4f + [ "$dir_pw_build:optimize_debugging" ]
    }
  }
  cortex_m4f_speed_optimized = {
    name = "arm_clang_cortex_m4f_speed_optimized"
    forward_variables_from(_arm_clang_toolchain, "*")
    defaults = {
      default_configs = _cortex_m4f + [ "$dir_pw_build:optimize_speed" ]
    }
  }
  cortex_m4f_size_optimized = {
    name = "arm_clang_cortex_m4f_size_optimized"
    forward_variables_from(_arm_clang_toolchain, "*")
    defaults = {
      default_configs = _cortex_m4f + [ "$dir_pw_build:optimize_size" ]
    }
  }
}

# This list just contains the members of the above scope for convenience to make
# it trivial to generate all the toolchains in this file via a
# `generate_toolchains` target.
pw_toolchain_arm_clang_list = [
  pw_toolchain_arm_clang.cortex_m3_debug,
  pw_toolchain_arm_clang.cortex_m3_speed_optimized,
  pw_toolchain_arm_clang.cortex_m3_size_optimized,
  pw_toolchain_arm_clang.cortex_m4_debug,
  pw_toolchain_arm_clang.cortex_m4_speed_optimized,
  pw_toolchain_arm_clang.cortex_m4_size_optimized,
  pw_toolchain_arm_clang.cortex_m4f_debug,
  pw_toolchain_arm_clang.cortex_m4f_speed_optimized,
  pw_toolchain_arm_clang.cortex_m4f_size_optimized,
]