| # Copyright 2016 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. | 
 |  | 
 | declare_args() { | 
 |   # The absolute path of the sysroot that is used with the target toolchain. | 
 |   target_sysroot = "" | 
 | } | 
 |  | 
 | if (current_os == target_os && target_sysroot != "") { | 
 |   sysroot = target_sysroot | 
 | } else if (is_fuchsia) { | 
 |   import("//zircon/public/sysroot/cpp.gni") | 
 |   sysroot = cpp_sysroot_dir | 
 | } else if (is_linux) { | 
 |   sysroot = "//prebuilt/third_party/sysroot/linux" | 
 | } else if (is_mac) { | 
 |   import("//build/config/mac/mac_sdk.gni") | 
 |   sysroot = mac_sdk_path | 
 | } else { | 
 |   sysroot = "" | 
 | } |