build/unification/zircon_library_forward.gn

# Copyright 2020 The Fuchsia Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

# This file lives at //build/unification/zircon_library_forward.gn; ONLY EDIT IT
# BY THAT NAME!

# Please do not remove the "ONLY EDIT IT BY THAT NAME!" bit as it is used as a
# marker to determine whether a build file was derived from the present file.
# There, here's another one to be really sure: ONLY EDIT IT BY THAT NAME!

import("//build/unification/zircon_library_mappings.gni")

dir = get_label_info(".", "name")
forward_target = false

foreach(mapping, zircon_library_mappings) {
  if (mapping.name == dir) {
    assert(forward_target == false, "$dir appears twice in library mappings")
    forward_target = mapping
  }
}

assert(forward_target != false, "Could not find $dir in library mappings")

label = forward_target.label
assert(current_toolchain == get_label_info(label, "toolchain"),
       "Cross-toolchain forwarding for ${label} is not currently supported")

group(dir) {
  public_deps = [ label ]
}

if (forward_target.sdk) {
  import("//build/sdk/sdk_atom_alias.gni")

  label_name = get_label_info(label, "name")
  label_dir = get_label_info(label, "dir")

  sdk_atom_alias("${dir}_sdk") {
    atom = "$label_dir:${label_name}_sdk"
  }
}