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#!/usr/bin/env python3
"""Helps manage sysroots."""
import argparse
import os
import subprocess
import sys
def make_fake_sysroot(out_dir):
def cmdout(cmd):
return subprocess.check_output(cmd).decode(sys.stdout.encoding).strip()
if sys.platform == 'win32':
p = os.getenv('ProgramFiles(x86)', 'C:\\Program Files (x86)')
winsdk = os.getenv('WindowsSdkDir')
if not winsdk:
winsdk = os.path.join(p, 'Windows Kits', '10')
print('%WindowsSdkDir% not set. You might want to run this from')
print('a Visual Studio cmd prompt. Defaulting to', winsdk)
vswhere = os.path.join(
p, 'Microsoft Visual Studio', 'Installer', 'vswhere')
vcid = 'Microsoft.VisualStudio.Component.VC.Tools.x86.x64'
vsinstalldir = cmdout(
[vswhere, '-latest', '-products', '*', '-requires', vcid,
'-property', 'installationPath'])
def mkjunction(dst, src):
subprocess.check_call(['mklink', '/j', dst, src], shell=True)
os.mkdir(out_dir)
mkjunction(os.path.join(out_dir, 'VC'),
os.path.join(vsinstalldir, 'VC'))
os.mkdir(os.path.join(out_dir, 'Windows Kits'))
mkjunction(os.path.join(out_dir, 'Windows Kits', '10'), winsdk)
elif sys.platform == 'darwin':
# The SDKs used by default in compiler-rt/cmake/base-config-ix.cmake.
# COMPILER_RT_ENABLE_IOS defaults to on.
# COMPILER_RT_ENABLE_WATCHOS and COMPILER_RT_ENABLE_TV default to off.
# compiler-rt/cmake/config-ix.cmake sets DARWIN_EMBEDDED_PLATFORMS
# depending on these.
sdks = ['macosx', 'iphoneos', 'iphonesimulator']
os.mkdir(out_dir)
for sdk in sdks:
sdkpath = cmdout(['xcrun', '-sdk', sdk, '-show-sdk-path'])
# sdkpath is something like /.../SDKs/MacOSX11.1.sdk, which is a
# symlink to MacOSX.sdk in the same directory. Resolve the symlink,
# to make the symlink in out_dir less likely to break when the SDK
# is updated (which will bump the number on xcrun's output, but not
# on the symlink destination).
sdkpath = os.path.realpath(sdkpath)
os.symlink(sdkpath, os.path.join(out_dir, os.path.basename(sdkpath)))
else:
os.symlink('/', out_dir)
print('Done. Pass these flags to cmake:')
abs_out_dir = os.path.abspath(out_dir)
if sys.platform == 'win32':
# CMake doesn't like backslashes in commandline args.
abs_out_dir = abs_out_dir.replace(os.path.sep, '/')
print(' -DLLVM_WINSYSROOT=' + abs_out_dir)
elif sys.platform == 'darwin':
flags = [
'-DCMAKE_OSX_SYSROOT=' + os.path.join(abs_out_dir, 'MacOSX.sdk'),
# For find_darwin_sdk_dir() in
# compiler-rt/cmake/Modules/CompilerRTDarwinUtils.cmake
'-DDARWIN_macosx_CACHED_SYSROOT=' +
os.path.join(abs_out_dir, 'MacOSX.sdk'),
'-DDARWIN_iphoneos_CACHED_SYSROOT=' +
os.path.join(abs_out_dir, 'iPhoneOS.sdk'),
'-DDARWIN_iphonesimulator_CACHED_SYSROOT=' +
os.path.join(abs_out_dir, 'iPhoneSimulator.sdk'),
]
print(' ' + ' '.join(flags))
else:
print(' -DCMAKE_SYSROOT=' + abs_out_dir + ' to cmake.')
def main():
parser = argparse.ArgumentParser(description=__doc__)
subparsers = parser.add_subparsers(dest='command', required=True)
makefake = subparsers.add_parser('make-fake',
help='Create a sysroot that symlinks to local directories.')
makefake.add_argument('--out-dir', required=True)
args = parser.parse_args()
assert args.command == 'make-fake'
make_fake_sysroot(args.out_dir)
if __name__ == '__main__':
main()
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