
import os
import subprocess
import sys


def main():
  devnull = open(os.devnull, 'w')
  for clang in ('clang', 'clang-3.8', 'clang-3.5'):
    if subprocess.call(['which', clang], stdout=devnull, stderr=devnull) != 0:
      continue
    res = subprocess.check_output([clang, '-print-search-dirs'])
    for line in res.splitlines():
      if not line.startswith('libraries:'):
        continue
      libs = line.split('=', 1)[1].split(':')
      for lib in libs:
        if '/clang/' not in lib or not os.path.isdir(lib + '/lib'):
          continue
        print os.path.abspath(lib)
        print clang
        print clang.replace('clang', 'clang++')
        return 0
  print 'Could not find the LLVM lib dir'
  return 1


if __name__ == '__main__':
  sys.exit(main())


import os
import subprocess
import sys


def main():
  devnull = open(os.devnull, 'w')
  for clang in ('clang', 'clang-3.8', 'clang-3.5'):
    if subprocess.call(['which', clang], stdout=devnull, stderr=devnull) != 0:
      continue
    res = subprocess.check_output([clang, '-print-search-dirs']).decode("utf-8")
    for line in res.splitlines():
      if not line.startswith('libraries:'):
        continue
      libs = line.split('=', 1)[1].split(':')
      for lib in libs:
        if '/clang/' not in lib or not os.path.isdir(lib + '/lib'):
          continue
        print(os.path.abspath(lib))
        print(clang)
        print(clang.replace('clang', 'clang++'))
        return 0
  print('Could not find the LLVM lib dir')
  return 1


if __name__ == '__main__':
  sys.exit(main())

Fix issue with finding llvm when using python3
gn: Fix issue with finding llvm when using python3

With python3, subprocess output is a byte sequence. This needs to be
decoded to string so that the string functions work. Fix it so we can
find LLVM when building perfetto.

Also fix 'print' operator which is a function in python3.

Bug: 147789115

Signed-off-by: Joel Fernandes <89f39a38232ac523c7644e47b6ca6563177e40b4@google.com>
Change-Id: I4ab9b3c248d471e7ab5a27559152a1954ca43108

  
  import os
  import subprocess
  import sys
  
  
  def main():
    devnull = open(os.devnull, 'w')
    for clang in ('clang', 'clang-3.8', 'clang-3.5'):
      if subprocess.call(['which', clang], stdout=devnull, stderr=devnull) != 0:
        continue
-     res = subprocess.check_output([clang, '-print-search-dirs'])
+     res = subprocess.check_output([clang, '-print-search-dirs']).decode("utf-8")
      for line in res.splitlines():
        if not line.startswith('libraries:'):
          continue
        libs = line.split('=', 1)[1].split(':')
        for lib in libs:
          if '/clang/' not in lib or not os.path.isdir(lib + '/lib'):
            continue
-         print os.path.abspath(lib)
+         print(os.path.abspath(lib))
-         print clang
+         print(clang)
-         print clang.replace('clang', 'clang++')
+         print(clang.replace('clang', 'clang++'))
          return 0
-   print 'Could not find the LLVM lib dir'
+   print('Could not find the LLVM lib dir')
    return 1
  
  
  if __name__ == '__main__':
    sys.exit(main())
  
Fix issue with finding llvm when using python3
## Code Before:

import os
import subprocess
import sys


def main():
  devnull = open(os.devnull, 'w')
  for clang in ('clang', 'clang-3.8', 'clang-3.5'):
    if subprocess.call(['which', clang], stdout=devnull, stderr=devnull) != 0:
      continue
    res = subprocess.check_output([clang, '-print-search-dirs'])
    for line in res.splitlines():
      if not line.startswith('libraries:'):
        continue
      libs = line.split('=', 1)[1].split(':')
      for lib in libs:
        if '/clang/' not in lib or not os.path.isdir(lib + '/lib'):
          continue
        print os.path.abspath(lib)
        print clang
        print clang.replace('clang', 'clang++')
        return 0
  print 'Could not find the LLVM lib dir'
  return 1


if __name__ == '__main__':
  sys.exit(main())

## Instruction:
Fix issue with finding llvm when using python3
## Code After:

import os
import subprocess
import sys


def main():
  devnull = open(os.devnull, 'w')
  for clang in ('clang', 'clang-3.8', 'clang-3.5'):
    if subprocess.call(['which', clang], stdout=devnull, stderr=devnull) != 0:
      continue
    res = subprocess.check_output([clang, '-print-search-dirs']).decode("utf-8")
    for line in res.splitlines():
      if not line.startswith('libraries:'):
        continue
      libs = line.split('=', 1)[1].split(':')
      for lib in libs:
        if '/clang/' not in lib or not os.path.isdir(lib + '/lib'):
          continue
        print(os.path.abspath(lib))
        print(clang)
        print(clang.replace('clang', 'clang++'))
        return 0
  print('Could not find the LLVM lib dir')
  return 1


if __name__ == '__main__':
  sys.exit(main())
