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#!/usr/bin/env python3
# Copyright 2014 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Outputs host CPU architecture in format recognized by gyp."""
from functools import lru_cache
import platform
import re
@lru_cache(maxsize=None)
def HostArch():
"""Returns the host architecture with a predictable string."""
host_arch = platform.machine().lower()
host_processor = platform.processor().lower()
# Convert machine type to format recognized by gyp.
if re.match(r'i.86', host_arch) or host_arch == 'i86pc':
host_arch = 'x86'
elif host_arch in ['x86_64', 'amd64']:
host_arch = 'x64'
elif host_arch == 'arm64' or host_arch.startswith('aarch64'):
host_arch = 'arm64'
elif host_arch.startswith('arm'):
host_arch = 'arm'
elif host_arch.startswith('mips64'):
host_arch = 'mips64'
elif host_arch.startswith('mips'):
host_arch = 'mips'
elif host_arch.startswith('ppc') or host_processor == 'powerpc':
host_arch = 'ppc'
elif host_arch.startswith('s390'):
host_arch = 's390'
elif host_arch.startswith('riscv'):
host_arch = 'riscv64'
elif platform.system() == 'OS/390':
host_arch = 's390x'
if host_arch == 'arm64':
host_platform = platform.architecture()
if len(host_platform) > 1:
if host_platform[1].lower() == 'windowspe':
# Special case for Windows on Arm: windows-386 packages no
# longer work so use the x64 emulation (this restricts us to
# Windows 11). Python 32-bit returns the host_arch as arm64,
# 64-bit does not.
return 'x64'
# platform.machine is based on running kernel. It's possible to use 64-bit
# kernel with 32-bit userland, e.g. to give linker slightly more memory.
# Distinguish between different userland bitness by querying
# the python binary.
if host_arch == 'x64' and platform.architecture()[0] == '32bit':
host_arch = 'x86'
if host_arch == 'arm64' and platform.architecture()[0] == '32bit':
host_arch = 'arm'
return host_arch
def DoMain(_):
"""Hook to be called from gyp without starting a separate python
interpreter."""
return HostArch()
if __name__ == '__main__':
print(DoMain([]))
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