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This is a tiny bit messy because compiler-rt needs different sysroots for macOS, iOS, etc. We want sysroot.py to create something that is a hermetic representation of all build deps, so it needs to create a directory that contains all needed SDKs, and these subdirectories are then passed to cmake which passes each of these _subdirectories_ as different -isysroot flags while building the runtime libraries. Differential Revision: https://reviews.llvm.org/D96958
99 lines
3.7 KiB
Python
Executable File
99 lines
3.7 KiB
Python
Executable File
#!/usr/bin/env python3
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"""Helps manage sysroots."""
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import argparse
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import os
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import subprocess
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import sys
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def make_fake_sysroot(out_dir):
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def cmdout(cmd):
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return subprocess.check_output(cmd).decode(sys.stdout.encoding).strip()
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if sys.platform == 'win32':
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p = os.getenv('ProgramFiles(x86)', 'C:\\Program Files (x86)')
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winsdk = os.getenv('WindowsSdkDir')
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if not winsdk:
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winsdk = os.path.join(p, 'Windows Kits', '10')
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print('%WindowsSdkDir% not set. You might want to run this from')
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print('a Visual Studio cmd prompt. Defaulting to', winsdk)
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vswhere = os.path.join(
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p, 'Microsoft Visual Studio', 'Installer', 'vswhere')
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vcid = 'Microsoft.VisualStudio.Component.VC.Tools.x86.x64'
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vsinstalldir = cmdout(
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[vswhere, '-latest', '-products', '*', '-requires', vcid,
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'-property', 'installationPath'])
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def mkjunction(dst, src):
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subprocess.check_call(['mklink', '/j', dst, src], shell=True)
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os.mkdir(out_dir)
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mkjunction(os.path.join(out_dir, 'VC'),
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os.path.join(vsinstalldir, 'VC'))
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os.mkdir(os.path.join(out_dir, 'Windows Kits'))
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mkjunction(os.path.join(out_dir, 'Windows Kits', '10'), winsdk)
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elif sys.platform == 'darwin':
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# The SDKs used by default in compiler-rt/cmake/base-config-ix.cmake.
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# COMPILER_RT_ENABLE_IOS defaults to on.
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# COMPILER_RT_ENABLE_WATCHOS and COMPILER_RT_ENABLE_TV default to off.
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# compiler-rt/cmake/config-ix.cmake sets DARWIN_EMBEDDED_PLATFORMS
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# depending on these.
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sdks = ['macosx', 'iphoneos', 'iphonesimulator']
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os.mkdir(out_dir)
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for sdk in sdks:
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sdkpath = cmdout(['xcrun', '-sdk', sdk, '-show-sdk-path'])
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# sdkpath is something like /.../SDKs/MacOSX11.1.sdk, which is a
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# symlink to MacOSX.sdk in the same directory. Resolve the symlink,
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# to make the symlink in out_dir less likely to break when the SDK
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# is updated (which will bump the number on xcrun's output, but not
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# on the symlink destination).
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sdkpath = os.path.realpath(sdkpath)
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os.symlink(sdkpath, os.path.join(out_dir, os.path.basename(sdkpath)))
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else:
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os.symlink('/', out_dir)
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print('Done. Pass these flags to cmake:')
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abs_out_dir = os.path.abspath(out_dir)
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if sys.platform == 'win32':
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# CMake doesn't like backslashes in commandline args.
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abs_out_dir = abs_out_dir.replace(os.path.sep, '/')
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print(' -DLLVM_WINSYSROOT=' + abs_out_dir)
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elif sys.platform == 'darwin':
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flags = [
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'-DCMAKE_OSX_SYSROOT=' + os.path.join(abs_out_dir, 'MacOSX.sdk'),
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# For find_darwin_sdk_dir() in
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# compiler-rt/cmake/Modules/CompilerRTDarwinUtils.cmake
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'-DDARWIN_macosx_CACHED_SYSROOT=' +
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os.path.join(abs_out_dir, 'MacOSX.sdk'),
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'-DDARWIN_iphoneos_CACHED_SYSROOT=' +
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os.path.join(abs_out_dir, 'iPhoneOS.sdk'),
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'-DDARWIN_iphonesimulator_CACHED_SYSROOT=' +
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os.path.join(abs_out_dir, 'iPhoneSimulator.sdk'),
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]
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print(' ' + ' '.join(flags))
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else:
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print(' -DCMAKE_SYSROOT=' + abs_out_dir + ' to cmake.')
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def main():
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parser = argparse.ArgumentParser(description=__doc__)
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subparsers = parser.add_subparsers(dest='command', required=True)
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makefake = subparsers.add_parser('make-fake',
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help='Create a sysroot that symlinks to local directories.')
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makefake.add_argument('--out-dir', required=True)
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args = parser.parse_args()
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assert args.command == 'make-fake'
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make_fake_sysroot(args.out_dir)
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if __name__ == '__main__':
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main()
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