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  elif host_arch.startswith('aarch64'):
25    host_arch = 'arm64'
26  elif host_arch.startswith('mips'):
27    host_arch = 'mips'
28  elif host_arch.startswith('ppc'):
29    host_arch = 'ppc'
30  elif host_arch.startswith('s390'):
31    host_arch = 's390'
32
33
34  # platform.machine is based on running kernel. It's possible to use 64-bit
35  # kernel with 32-bit userland, e.g. to give linker slightly more memory.
36  # Distinguish between different userland bitness by querying
37  # the python binary.
38  if host_arch == 'x64' and platform.architecture()[0] == '32bit':
39    host_arch = 'ia32'
40  if host_arch == 'arm64' and platform.architecture()[0] == '32bit':
41    host_arch = 'arm'
42
43  return host_arch
44
45def DoMain(_):
46  """Hook to be called from gyp without starting a separate python
47  interpreter."""
48  return HostArch()
49
50if __name__ == '__main__':
51  print DoMain([])
52