1# Copyright 2019 The Chromium Authors. All rights reserved. 2# Use of this source code is governed by a BSD-style license that can be 3# found in the LICENSE file. 4 5# These are primarily relevant in current_cpu == "x64" contexts, where 6# X64 code is being compiled. 7if (current_cpu == "x64") { 8 declare_args() { 9 # The micro architecture of x64 cpu. This will be a string like "haswell" or 10 # "skylake". An empty string means to use the default architecture which is 11 # "x86-64". 12 # CPU options for "x86-64" in GCC can be found at 13 # https://gcc.gnu.org/onlinedocs/gcc/x86-Options.html 14 # CPU options for "x86-64" in llvm can be found at 15 # https://github.com/llvm/llvm-project/blob/master/llvm/include/llvm/Support/X86TargetParser.def 16 x64_arch = "" 17 } 18 19 if ((is_posix && !is_apple) || is_fuchsia) { 20 if (x64_arch == "") { 21 x64_arch = "x86-64" 22 } 23 } 24} 25