Build dynamic framework with podspec for Objective-C API.

webrtc/build/ios/flatten_ios_headers

+#!/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 flattening iOS header structure."""
+
+import optparse
+import os
+import shutil
+import sys
+
+def FlattenHeaders(lib_base_dir, framework_base_dir):
+  """Flattens iOS header file directory structure."""
+  include_dir = 'include'
+  unflattened_include_dir_path = os.path.join(lib_base_dir, include_dir)
+  flattened_include_dir_path = os.path.join(framework_base_dir, include_dir)
+
+  # Create output directories.
+  if not os.path.exists(framework_base_dir):
+    os.mkdir(framework_base_dir)
+  if not os.path.exists(flattened_include_dir_path):
+    os.mkdir(flattened_include_dir_path)
+
+  for dirpath, _, filenames in os.walk(unflattened_include_dir_path):
+    for filename in filenames:
+      current_path = os.path.join(dirpath, filename)
+      new_path = os.path.join(flattened_include_dir_path, filename)
+      shutil.copy(current_path, new_path)
+
+def Main():
+  parser = optparse.OptionParser()
+  _, args = parser.parse_args()
+  if len(args) != 2:
+    parser.error('Error: Exactly 2 arguments required.')
+  lib_base_dir = args[0]
+  framework_base_dir = args[1]
+  FlattenHeaders(lib_base_dir, framework_base_dir)
+
+if __name__ == '__main__':
+  sys.exit(Main())