llvm/utils/sysroot.py

   1 #!/usr/bin/env python3
   2
   3 """Helps manage sysroots."""
   4
   5 import argparse
   6 import os
   7 import subprocess
   8 import sys
   9
  10
  11 def make_fake_sysroot(out_dir):
  12     def cmdout(cmd):
  13         return subprocess.check_output(cmd).decode(sys.stdout.encoding).strip()
  14
  15     if sys.platform == 'win32':
  16         p = os.getenv('ProgramFiles(x86)', 'C:\\Program Files (x86)')
  17
  18         winsdk = os.getenv('WindowsSdkDir')
  19         if not winsdk:
  20             winsdk = os.path.join(p, 'Windows Kits', '10')
  21             print('%WindowsSdkDir% not set. You might want to run this from')
  22             print('a Visual Studio cmd prompt. Defaulting to', winsdk)
  23
  24         vswhere = os.path.join(
  25                 p, 'Microsoft Visual Studio', 'Installer', 'vswhere')
  26         vcid = 'Microsoft.VisualStudio.Component.VC.Tools.x86.x64'
  27         vsinstalldir = cmdout(
  28                 [vswhere, '-latest', '-products', '*', '-requires', vcid,
  29                     '-property', 'installationPath'])
  30
  31         def mkjunction(dst, src):
  32             subprocess.check_call(['mklink', '/j', dst, src], shell=True)
  33         os.mkdir(out_dir)
  34         mkjunction(os.path.join(out_dir, 'VC'),
  35                    os.path.join(vsinstalldir, 'VC'))
  36         os.mkdir(os.path.join(out_dir, 'Windows Kits'))
  37         mkjunction(os.path.join(out_dir, 'Windows Kits', '10'), winsdk)
  38     elif sys.platform == 'darwin':
  39         # The SDKs used by default in compiler-rt/cmake/base-config-ix.cmake.
  40         # COMPILER_RT_ENABLE_IOS defaults to on.
  41         # COMPILER_RT_ENABLE_WATCHOS and COMPILER_RT_ENABLE_TV default to off.
  42         # compiler-rt/cmake/config-ix.cmake sets DARWIN_EMBEDDED_PLATFORMS
  43         # depending on these.
  44         sdks = ['macosx', 'iphoneos', 'iphonesimulator']
  45         os.mkdir(out_dir)
  46         for sdk in sdks:
  47           sdkpath = cmdout(['xcrun', '-sdk', sdk, '-show-sdk-path'])
  48           # sdkpath is something like /.../SDKs/MacOSX11.1.sdk, which is a
  49           # symlink to MacOSX.sdk in the same directory. Resolve the symlink,
  50           # to make the symlink in out_dir less likely to break when the SDK
  51           # is updated (which will bump the number on xcrun's output, but not
  52           # on the symlink destination).
  53           sdkpath = os.path.realpath(sdkpath)
  54           os.symlink(sdkpath, os.path.join(out_dir, os.path.basename(sdkpath)))
  55     else:
  56         os.symlink('/', out_dir)
  57
  58     print('Done. Pass these flags to cmake:')
  59     abs_out_dir = os.path.abspath(out_dir)
  60     if sys.platform == 'win32':
  61         # CMake doesn't like backslashes in commandline args.
  62         abs_out_dir = abs_out_dir.replace(os.path.sep, '/')
  63         print('  -DLLVM_WINSYSROOT=' + abs_out_dir)
  64     elif sys.platform == 'darwin':
  65         flags = [
  66           '-DCMAKE_OSX_SYSROOT=' + os.path.join(abs_out_dir, 'MacOSX.sdk'),
  67
  68           # For find_darwin_sdk_dir() in
  69           # compiler-rt/cmake/Modules/CompilerRTDarwinUtils.cmake
  70           '-DDARWIN_macosx_CACHED_SYSROOT=' +
  71               os.path.join(abs_out_dir, 'MacOSX.sdk'),
  72           '-DDARWIN_iphoneos_CACHED_SYSROOT=' +
  73               os.path.join(abs_out_dir, 'iPhoneOS.sdk'),
  74           '-DDARWIN_iphonesimulator_CACHED_SYSROOT=' +
  75               os.path.join(abs_out_dir, 'iPhoneSimulator.sdk'),
  76         ]
  77         print('  ' + ' '.join(flags))
  78     else:
  79         print('  -DCMAKE_SYSROOT=' + abs_out_dir + ' to cmake.')
  80
  81
  82 def main():
  83     parser = argparse.ArgumentParser(description=__doc__)
  84
  85     subparsers = parser.add_subparsers(dest='command', required=True)
  86
  87     makefake = subparsers.add_parser('make-fake',
  88             help='Create a sysroot that symlinks to local directories.')
  89     makefake.add_argument('--out-dir', required=True)
  90
  91     args = parser.parse_args()
  92
  93     assert args.command == 'make-fake'
  94     make_fake_sysroot(args.out_dir)
  95
  96
  97 if __name__ == '__main__':
  98     main()