third_party/abseil-cpp/BUILD.gn

# Copyright (c) 2018 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.

# Flags specified here must not impact ABI. Code compiled with and without these
# opts will be linked together, and in some cases headers compiled with and
# without these options will be part of the same program.

import("//build/toolchain/toolchain.gni")

group("default") {
  deps = [
    "absl/types:any",
    "absl/types:bad_any_cast",
    "absl/types:span",
    "absl/types:optional",
    "absl/types:bad_optional_access",
  ]
}

config("absl_include_config") {
  # Using -isystem (with clang and GCC) and -imsvc (with clang-cl) instead of
  # include_dirs (-I), so we don't need to suppress warnings coming from
  # Abseil. Doing so would mask warnings in our own code.
  if (is_win) {
    if (is_clang) {
      # clang-cl:
      cflags = [
        "-imsvc",
        rebase_path(".", root_build_dir),
      ]
    } else {
      # MSVC doesn't have -isystem, in that case we fallback to include_dirs and
      # we use the warning suppression flags defined in :absl_default_cflags_cc.
      include_dirs = [ "." ]
    }
  } else {
    # GCC or clang:
    cflags = [
      "-isystem",
      rebase_path(".", root_build_dir),
    ]
  }
}

config("absl_define_config") {
  defines = [ "ABSL_ALLOCATOR_NOTHROW=1" ]
}

config("absl_default_cflags_cc") {
  cflags_cc = []
  if (is_clang) {
    cflags_cc += [
      # TODO(crbug.com/588506): Explicitly enable conversion warnings.
      "-Wbool-conversion",
      "-Wconstant-conversion",
      "-Wenum-conversion",
      "-Wint-conversion",
      "-Wliteral-conversion",
      "-Wnon-literal-null-conversion",
      "-Wnull-conversion",
      "-Wobjc-literal-conversion",
      "-Wno-sign-conversion",
      "-Wstring-conversion",
    ]
    if (!is_nacl && !use_xcode_clang) {
      cflags_cc += [ "-Wbitfield-enum-conversion" ]
    }
  }
  if (is_win) {
    cflags_cc += [
      "/wd4005",  # macro-redefinition
      "/wd4068",  # unknown pragma
      "/wd4702",  # unreachable code
    ]
  }
}

config("absl_test_cflags_cc") {
  cflags_cc = []
  if (is_clang || !is_win) {
    cflags_cc += [
      "-Wno-conversion-null",
      "-Wno-missing-declarations",
      "-Wno-sign-compare",
      "-Wno-unused-function",
      "-Wno-unused-parameter",
      "-Wno-unused-private-field",
    ]
  }
  if (is_win) {
    cflags_cc += [
      "/wd4018",  # signed/unsigned mismatch
      "/wd4101",  # unreferenced local variable
    ]
  }
}