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      1 #!/usr/bin/env python
      2 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
      3 # Use of this source code is governed by a BSD-style license that can be
      4 # found in the LICENSE file.
      5 
      6 import os
      7 import shutil
      8 import subprocess
      9 import sys
     10 import tempfile
     11 
     12 def _Usage():
     13   print 'Usage: merge_static_libs OUTPUT_LIB INPUT_LIB [INPUT_LIB]*'
     14   sys.exit(1)
     15 
     16 def MergeLibs(in_libs, out_lib):
     17   """ Merges multiple static libraries into one.
     18 
     19   in_libs: list of paths to static libraries to be merged
     20   out_lib: path to the static library which will be created from in_libs
     21   """
     22   if os.name == 'posix':
     23     tempdir = tempfile.mkdtemp()
     24     abs_in_libs = []
     25     for in_lib in in_libs:
     26       abs_in_libs.append(os.path.abspath(in_lib))
     27     curdir = os.getcwd()
     28     os.chdir(tempdir)
     29     objects = []
     30     ar = os.environ.get('AR', 'ar')
     31     for in_lib in abs_in_libs:
     32       proc = subprocess.Popen([ar, '-t', in_lib], stdout=subprocess.PIPE)
     33       proc.wait()
     34       obj_str = proc.communicate()[0]
     35       current_objects = obj_str.rstrip().split('\n')
     36       proc = subprocess.Popen([ar, '-x', in_lib], stdout=subprocess.PIPE,
     37                               stderr=subprocess.STDOUT)
     38       proc.wait()
     39       if proc.poll() == 0:
     40         # The static library is non-thin, and we extracted objects
     41         for obj in current_objects:
     42           objects.append(os.path.abspath(obj))
     43       elif 'thin archive' in proc.communicate()[0]:
     44         # The static library is thin, so it contains the paths to its objects
     45         for obj in current_objects:
     46           objects.append(obj)
     47       else:
     48         raise Exception('Failed to extract objects from %s.' % in_lib)
     49     os.chdir(curdir)
     50     if not subprocess.call([ar, '-crs', out_lib] + objects) == 0:
     51       raise Exception('Failed to add object files to %s' % out_lib)
     52     shutil.rmtree(tempdir)
     53   elif os.name == 'nt':
     54     subprocess.call(['lib', '/OUT:%s' % out_lib] + in_libs)
     55   else:
     56     raise Exception('Error: Your platform is not supported')
     57 
     58 def Main():
     59   if len(sys.argv) < 3:
     60     _Usage()
     61   out_lib = sys.argv[1]
     62   in_libs = sys.argv[2:]
     63   MergeLibs(in_libs, out_lib)
     64 
     65 if '__main__' == __name__:
     66   sys.exit(Main())
     67