Move hash computation from bash script to a python script because calling md5 repeatedly from bash is too slow.
--
MOS_MIGRATED_REVID=134087524
diff --git a/src/tools/xcode/libtool/make_hashed_objlist.py b/src/tools/xcode/libtool/make_hashed_objlist.py
new file mode 100644
index 0000000..077d2d1
--- /dev/null
+++ b/src/tools/xcode/libtool/make_hashed_objlist.py
@@ -0,0 +1,50 @@
+# pylint: disable=g-bad-file-header
+# Copyright 2016 The Bazel Authors. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Creates symbolic links for .o files with hashcode.
+
+This script reads the file list containing the input files, creates symbolic
+links with a path-hash appended to their original name (foo.o becomes
+foo_{md5sum}.o), then saves the list of symbolic links to another file.
+
+This is to circumvent a bug in the original libtool that arises when two input
+files have the same base name (even if they are in different directories).
+"""
+
+import hashlib
+import os
+import sys
+
+
+def main():
+ obj_file_list = open(sys.argv[1])
+ hashed_obj_file_list = open(sys.argv[2], 'w')
+
+ for line in obj_file_list:
+ obj_file_path = line.rstrip('\n')
+ hashed_obj_file_path = '%s_%s.o' % (
+ os.path.splitext(obj_file_path)[0],
+ hashlib.md5(obj_file_path).hexdigest())
+
+ hashed_obj_file_list.write(hashed_obj_file_path + '\n')
+
+ # Create symlink only if the symlink doesn't exist.
+ if not os.path.exists(hashed_obj_file_path):
+ os.symlink(os.path.basename(obj_file_path), hashed_obj_file_path)
+
+ hashed_obj_file_list.close()
+
+if __name__ == '__main__':
+ main()
