Fix WebRTC API framework build.

webrtc/build/ios/merge_ios_libs

-#!/usr/bin/python
-
-#  Copyright 2016 The WebRTC project authors. All Rights Reserved.
-#
-#  Use of this source code is governed by a BSD-style license
-#  that can be found in the LICENSE file in the root of the source
-#  tree. An additional intellectual property rights grant can be found
-#  in the file PATENTS.  All contributing project authors may
-#  be found in the AUTHORS file in the root of the source tree.
-
-"""Script for merging generated iOS libraries."""
-
-import optparse
-import os
-import re
-import subprocess
-import sys
-
-
-def MergeLibs(lib_base_dir):
-  """Merges generated iOS libraries for different archs.
-
-  Uses libtool to generate FAT archive files for each generated library.
-
-  Args:
-    lib_base_dir: directory whose subdirectories are named by architecture and
-                  contain the built libraries for that architecture
-
-  Returns:
-    Exit code of libtool.
-  """
-  include_dir_name = 'include'
-  output_dir_name = 'lib'
-  archs = [arch for arch in os.listdir(lib_base_dir)
-           if arch[:1] != '.' and arch != output_dir_name
-           and arch != include_dir_name]
-  # For each arch, find (library name, libary path) for arch. We will merge
-  # all libraries with the same name.
-  libs = {}
-  for dirpath, _, filenames in os.walk(lib_base_dir):
-    if dirpath.endswith(output_dir_name):
-      continue
-    for filename in filenames:
-      if not filename.endswith('.a'):
-        continue
-      entry = libs.get(filename, [])
-      entry.append(os.path.join(dirpath, filename))
-      libs[filename] = entry
-
-  orphaned_libs = {}
-  valid_libs = {}
-  for library, paths in libs.items():
-    if len(paths) < len(archs):
-      orphaned_libs[library] = paths
-    else:
-      valid_libs[library] = paths
-  for library, paths in orphaned_libs.items():
-    components = library[:-2].split('_')[:-1]
-    found = False
-    # Find directly matching parent libs by stripping suffix.
-    while components and not found:
-      parent_library = '_'.join(components) + '.a'
-      if parent_library in valid_libs:
-        valid_libs[parent_library].extend(paths)
-        found = True
-        break
-      components = components[:-1]
-    # Find next best match by finding parent libs with the same prefix.
-    if not found:
-      base_prefix = library[:-2].split('_')[0]
-      for valid_lib, valid_paths in valid_libs.items():
-        prefix = '_'.join(components)
-        if valid_lib[:len(base_prefix)] == base_prefix:
-          valid_paths.extend(paths)
-          found = True
-          break
-    assert found
-
-  # Create output directory.
-  output_dir_path = os.path.join(lib_base_dir, output_dir_name)
-  if not os.path.exists(output_dir_path):
-    os.mkdir(output_dir_path)
-
-  # Use this so libtool merged binaries are always the same.
-  env = os.environ.copy()
-  env['ZERO_AR_DATE'] = '1'
-
-  # Ignore certain errors.
-  libtool_re = re.compile(r'^.*libtool:.*file: .* has no symbols$')
-
-  # Merge libraries using libtool.
-  for library, paths in valid_libs.items():
-    cmd_list = ['libtool', '-static', '-v', '-o',
-                os.path.join(output_dir_path, library)] + paths
-    libtoolout = subprocess.Popen(cmd_list, stderr=subprocess.PIPE, env=env)
-    _, err = libtoolout.communicate()
-    for line in err.splitlines():
-      if not libtool_re.match(line):
-        print >>sys.stderr, line
-    # Unconditionally touch the output .a file on the command line if present
-    # and the command succeeded. A bit hacky.
-    if not libtoolout.returncode:
-      for i in range(len(cmd_list) - 1):
-        if cmd_list[i] == '-o' and cmd_list[i+1].endswith('.a'):
-          os.utime(cmd_list[i+1], None)
-          break
-    else:
-      return libtoolout.returncode
-  return libtoolout.returncode
-
-
-def Main():
-  parser = optparse.OptionParser()
-  _, args = parser.parse_args()
-  if len(args) != 1:
-    parser.error('Error: Exactly 1 argument required.')
-  lib_base_dir = args[0]
-  MergeLibs(lib_base_dir)
-
-if __name__ == '__main__':
-  sys.exit(Main())