build/detect_host_arch.py

   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
   8 import platform
   9 import re
  10 import sys
  11
  12
  13 def 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
  34 def DoMain(_):
  35   """Hook to be called from gyp without starting a separate python
  36   interpreter."""
  37   return HostArch()
  38
  39 if __name__ == '__main__':
  40   print DoMain([])