diff -r 000000000000 -r 6474c204b198 config/expandlibs_gen.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/config/expandlibs_gen.py	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,50 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+'''Given a list of object files and library names, prints a library
+descriptor to standard output'''
+
+from __future__ import with_statement
+import sys
+import os
+import expandlibs_config as conf
+from expandlibs import LibDescriptor, isObject, ensureParentDir, ExpandLibsDeps
+from optparse import OptionParser
+
+def generate(args):
+    desc = LibDescriptor()
+    for arg in args:
+        if isObject(arg):
+            if os.path.exists(arg):
+                desc['OBJS'].append(os.path.abspath(arg))
+            else:
+                raise Exception("File not found: %s" % arg)
+        elif os.path.splitext(arg)[1] == conf.LIB_SUFFIX:
+            if os.path.exists(arg) or os.path.exists(arg + conf.LIBS_DESC_SUFFIX):
+                desc['LIBS'].append(os.path.abspath(arg))
+            else:
+                raise Exception("File not found: %s" % arg)
+    return desc
+
+if __name__ == '__main__':
+    parser = OptionParser()
+    parser.add_option("--depend", dest="depend", metavar="FILE",
+        help="generate dependencies for the given execution and store it in the given file")
+    parser.add_option("-o", dest="output", metavar="FILE",
+        help="send output to the given file")
+
+    (options, args) = parser.parse_args()
+    if not options.output:
+        raise Exception("Missing option: -o")
+
+    ensureParentDir(options.output)
+    with open(options.output, 'w') as outfile:
+        print >>outfile, generate(args)
+    if options.depend:
+        ensureParentDir(options.depend)
+        with open(options.depend, 'w') as depfile:
+            deps = ExpandLibsDeps(args)
+            depfile.write("%s : %s\n" % (options.output, ' '.join(deps)))
+            for dep in deps:
+                depfile.write("%s :\n" % dep)