components/nacl/features.gni

# Copyright 2017 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/gclient_args.gni")

# The NaCl sandbox and toolchain currently only support x86-32, x86-64
# and ARM32.
#
# The NaCl sandbox itself supports MIPS32, but the Clang toolchain
# support for that is no longer up-to-date, so we don't include that
# in the list of CPU architectures to enable NaCl on.
#
# NaCl is also supported on ARM64 Chrome OS, where the ARM32 NaCl
# sandbox is used.
# NaCl works on non-Chrome-OS ARM64 Linux, but we don't enable it by default in
# that case.
_cpu_is_supported =
    target_cpu == "x86" || target_cpu == "x64" || target_cpu == "arm" ||
    (target_cpu == "arm64" && target_os == "chromeos")

declare_args() {
  # Enables Native Client support.
  #
  # NaCl is only supported on ChromeOS.
  enable_nacl = checkout_nacl && _cpu_is_supported && target_os == "chromeos"
}

assert(!enable_nacl || checkout_nacl)