1#!/usr/bin/env python
2# Copyright 2014 the V8 project authors. All rights reserved.
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4# modification, are permitted provided that the following conditions are
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27# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28
29"""Outputs host CPU architecture in format recognized by gyp."""
30
31
32from __future__ import print_function
33import platform
34import re
35import sys
36
37
38def main():
39  print(DoMain([]))
40  return 0
41
42def DoMain(_):
43  return DetectHostArch();
44
45def DetectHostArch():
46  """Hook to be called from gyp without starting a separate python
47  interpreter."""
48  host_arch = platform.machine()
49  host_system = platform.system();
50
51  # Convert machine type to format recognized by gyp.
52  if re.match(r'i.86', host_arch) or host_arch == 'i86pc':
53    host_arch = 'ia32'
54  elif host_arch in ['x86_64', 'amd64']:
55    host_arch = 'x64'
56  elif host_arch.startswith('arm'):
57    host_arch = 'arm'
58  elif host_arch == 'aarch64':
59    host_arch = 'arm64'
60  elif host_arch == 'mips64':
61    host_arch = 'mips64el'
62  elif host_arch.startswith('mips'):
63    host_arch = 'mipsel'
64
65  # Under AIX the value returned by platform.machine is not
66  # the best indicator of the host architecture
67  # AIX 6.1 which is the lowest level supported only provides
68  # a 64 bit kernel
69  if host_system == 'AIX':
70    host_arch = 'ppc64'
71
72  # platform.machine is based on running kernel. It's possible to use 64-bit
73  # kernel with 32-bit userland, e.g. to give linker slightly more memory.
74  # Distinguish between different userland bitness by querying
75  # the python binary.
76  if host_arch == 'x64' and platform.architecture()[0] == '32bit':
77    host_arch = 'ia32'
78
79  return host_arch
80
81if __name__ == '__main__':
82  sys.exit(main())
83