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1#!/usr/bin/env python
2# Copyright 2014 The Chromium Authors. All rights reserved.
3# Use of this source code is governed by a BSD-style license that can be
4# found in the LICENSE file.
5
6"""Outputs host CPU architecture in format recognized by gyp."""
7
8import platform
9import re
10import sys
11
12
13def HostArch():
14  """Returns the host architecture with a predictable string."""
15  host_arch = platform.machine()
16
17  # Convert machine type to format recognized by gyp.
18  if re.match(r'i.86', host_arch) or host_arch == 'i86pc':
19    host_arch = 'ia32'
20  elif host_arch in ['x86_64', 'amd64']:
21    host_arch = 'x64'
22  elif host_arch.startswith('arm'):
23    host_arch = 'arm'
24
25  # platform.machine is based on running kernel. It's possible to use 64-bit
26  # kernel with 32-bit userland, e.g. to give linker slightly more memory.
27  # Distinguish between different userland bitness by querying
28  # the python binary.
29  if host_arch == 'x64' and platform.architecture()[0] == '32bit':
30    host_arch = 'ia32'
31
32  return host_arch
33
34def DoMain(_):
35  """Hook to be called from gyp without starting a separate python
36  interpreter."""
37  return HostArch()
38
39if __name__ == '__main__':
40  print DoMain([])
41