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# 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 sys
import argparse
import os
import re
import subprocess
# Valid arch subdir names.
VALID_ARCHS = ['arm_libs', 'arm64_libs', 'ia32_libs', 'x64_libs']
def MergeLibs(lib_base_dir):
"""Merges generated iOS libraries for different archs.
Uses libtool to generate FAT archive files for each generated library.
lib_base_dir: directory whose subdirectories are named by architecture and
contain the built libraries for that architecture
Exit code of libtool.
output_dir_name = 'fat_libs'
archs = [arch for arch in os.listdir(lib_base_dir)
if arch in VALID_ARCHS]
# For each arch, find (library name, libary path) for arch. We will merge
# all libraries with the same name.
libs = {}
for lib_dir in [os.path.join(lib_base_dir, arch) for arch in VALID_ARCHS]:
if not os.path.exists(lib_dir):
for dirpath, _, filenames in os.walk(lib_dir):
for filename in filenames:
if not filename.endswith('.a'):
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
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:
found = True
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():
if valid_lib[:len(base_prefix)] == base_prefix:
found = True
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):
# 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.
libtool_returncode = 0
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.
libtool_returncode = libtoolout.returncode
if not libtool_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)
return libtool_returncode
def Main():
parser_description = 'Merge WebRTC libraries.'
parser = argparse.ArgumentParser(description=parser_description)
help='Directory with built libraries. ',
args = parser.parse_args()
lib_base_dir = args.lib_base_dir
if __name__ == '__main__':