# Copyright 2014 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

import("//build/config/compiler/compiler.gni")
import("//build/config/sysroot.gni")
import("//build/toolchain/cros_toolchain.gni")
import("//build/toolchain/gcc_toolchain.gni")

# This is mostly identical to gcc_toolchain, but handles relativizing toolchain
# paths. This is needed for CrOS since these paths often change based on the
# environment. For example, cxx is a relative path picked up on $PATH in the
# chroot. But in Simple Chrome, cxx is a system-absolute path.
template("cros_toolchain") {
  gcc_toolchain(target_name) {
    forward_variables_from(invoker, "*")

    # CrOS's target toolchain wrapper prefers to invoke gomacc itself, so pass
    # it the gomacc path via cmd-line arg. Otherwise, for both CrOS's host
    # wrapper (used in the ebuild) and Chrome's clang (used in Simple Chrome),
    # prepend gomacc like normal.
    if (use_goma && toolchain_args.needs_gomacc_path_arg) {
      extra_cppflags += " --gomacc-path $goma_dir/gomacc"
    }
    if (use_rbe && toolchain_args.needs_gomacc_path_arg) {
      extra_cppflags += " --gomacc-path $rbe_cros_cc_wrapper"
    }

    # Relativize path if compiler is specified such that not to lookup from $PATH
    # and cc/cxx does not contain additional flags.
    if (cc != get_path_info(cc, "file") && string_replace(cc, " ", "") == cc) {
      cc = rebase_path(cc, root_build_dir)
    }
    if (cxx != get_path_info(cxx, "file") &&
        string_replace(cxx, " ", "") == cxx) {
      cxx = rebase_path(cxx, root_build_dir)
    }
    if (ar != get_path_info(ar, "file") && string_replace(ar, " ", "") == ar) {
      ar = rebase_path(ar, root_build_dir)
    }
    if (ld != get_path_info(ld, "file") && string_replace(ld, " ", "") == ld) {
      ld = rebase_path(ld, root_build_dir)
    }
  }
}

# This is the normal toolchain for most targets.
cros_toolchain("target") {
  ar = cros_target_ar
  cc = cros_target_cc
  cxx = cros_target_cxx
  ld = cros_target_ld

  if (cros_target_nm != "") {
    nm = cros_target_nm
  }
  if (cros_target_readelf != "") {
    readelf = cros_target_readelf
  }
  extra_cflags = cros_target_extra_cflags
  extra_cppflags = cros_target_extra_cppflags
  extra_cxxflags = cros_target_extra_cxxflags
  extra_ldflags = cros_target_extra_ldflags

  toolchain_args = {
    cc_wrapper = ""
    needs_gomacc_path_arg = true
    clang_use_chrome_plugins = false
    current_cpu = target_cpu
    current_os = "chromeos"
    is_clang = is_clang
    use_debug_fission = use_debug_fission
    use_gold = use_gold
    use_sysroot = use_sysroot
    sysroot = target_sysroot
  }
}

# This is a special toolchain needed just for the nacl_bootstrap target in
# //native_client/src/trusted/service_runtime/linux. It is identical
# to ":target" except that it forces use_debug_fission, use_gold, and
# use_sysroot off, and allows the user to set different sets of extra flags.
cros_toolchain("nacl_bootstrap") {
  ar = cros_target_ar
  cc = cros_target_cc
  cxx = cros_target_cxx
  ld = cros_target_ld

  if (cros_target_nm != "") {
    nm = cros_target_nm
  }
  if (cros_target_readelf != "") {
    readelf = cros_target_readelf
  }
  extra_cflags = cros_nacl_bootstrap_extra_cflags
  extra_cppflags = cros_nacl_bootstrap_extra_cppflags
  extra_cxxflags = cros_nacl_bootstrap_extra_cxxflags
  extra_ldflags = cros_nacl_bootstrap_extra_ldflags

  toolchain_args = {
    cc_wrapper = ""
    needs_gomacc_path_arg = true
    clang_use_chrome_plugins = false
    current_cpu = target_cpu
    current_os = "chromeos"
    is_clang = is_clang
    use_debug_fission = false
    use_gold = false
    use_sysroot = false
  }
}

cros_toolchain("host") {
  # These are args for the template.
  ar = cros_host_ar
  cc = cros_host_cc
  cxx = cros_host_cxx
  ld = cros_host_ld

  if (cros_host_nm != "") {
    nm = cros_host_nm
  }
  if (cros_host_readelf != "") {
    readelf = cros_host_readelf
  }
  extra_cflags = cros_host_extra_cflags
  extra_cppflags = cros_host_extra_cppflags
  extra_cxxflags = cros_host_extra_cxxflags
  extra_ldflags = cros_host_extra_ldflags

  toolchain_args = {
    cc_wrapper = ""
    needs_gomacc_path_arg = false
    clang_use_chrome_plugins = false
    is_clang = cros_host_is_clang
    current_cpu = host_cpu
    current_os = "linux"
    use_sysroot = use_sysroot
    sysroot = cros_host_sysroot
  }
}

cros_toolchain("v8_snapshot") {
  # These are args for the template.
  ar = cros_v8_snapshot_ar
  cc = cros_v8_snapshot_cc
  cxx = cros_v8_snapshot_cxx
  ld = cros_v8_snapshot_ld

  if (cros_v8_snapshot_nm != "") {
    nm = cros_v8_snapshot_nm
  }
  if (cros_v8_snapshot_readelf != "") {
    readelf = cros_v8_snapshot_readelf
  }
  extra_cflags = cros_v8_snapshot_extra_cflags
  extra_cppflags = cros_v8_snapshot_extra_cppflags
  extra_cxxflags = cros_v8_snapshot_extra_cxxflags
  extra_ldflags = cros_v8_snapshot_extra_ldflags

  toolchain_args = {
    cc_wrapper = ""
    needs_gomacc_path_arg = false
    clang_use_chrome_plugins = false
    is_clang = cros_v8_snapshot_is_clang
    if (target_cpu == "x86" || target_cpu == "arm" || target_cpu == "mipsel") {
      current_cpu = "x86"
    } else {
      current_cpu = "x64"
    }
    v8_current_cpu = v8_target_cpu
    current_os = "linux"
    use_sysroot = use_sysroot
    sysroot = cros_v8_snapshot_sysroot
  }
}