# Copyright 2025 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

import("//build/config/c++/c++.gni")

# The atomic support library contains static data that must not be duplicated in
# a given program (or wherever atomic objects are shared between components).
# Therefore, for correctness, we build it as a shared object in the componenet
# build.
#
# See crbug.com/402171653 for context.
if (is_component_build) {
  _target_type = "shared_library"
} else {
  _target_type = "source_set"
}

target(_target_type, "atomic") {
  sources = [
    "src/lib/builtins/assembly.h",
    "src/lib/builtins/atomic.c",
    "src/lib/builtins/int_endianness.h",
  ]

  if (_target_type == "shared_library") {
    no_default_deps = true
    if (is_win) {
      sources += [ "atomics.def" ]
    } else {
      configs -= [ "//build/config/gcc:symbol_visibility_hidden" ]
      configs += [ "//build/config/gcc:symbol_visibility_default" ]
    }

    if (is_android) {
      configs -= [ "//build/config/android:hide_all_but_jni_onload" ]
    }
  }

  configs += [ "//build/config/compiler:no_chromium_code" ]

  configs -= [
    "//build/config/compiler:chromium_code",
    "//build/config/coverage:default_coverage",
  ]
}