diff --git a/cmdline.py b/cmdline.py
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+# Copyright 2013, Big Switch Networks, Inc.
+#
+# LoxiGen is licensed under the Eclipse Public License, version 1.0 (EPL), with
+# the following special exception:
+#
+# LOXI Exception
+#
+# As a special exception to the terms of the EPL, you may distribute libraries
+# generated by LoxiGen (LoxiGen Libraries) under the terms of your choice, provided
+# that copyright and licensing notices generated by LoxiGen are not altered or removed
+# from the LoxiGen Libraries and the notice provided below is (i) included in
+# the LoxiGen Libraries, if distributed in source code form and (ii) included in any
+# documentation for the LoxiGen Libraries, if distributed in binary form.
+#
+# Notice: "Copyright 2013, Big Switch Networks, Inc. This library was generated by the LoxiGen Compiler."
+#
+# You may not use this file except in compliance with the EPL or LOXI Exception. You may obtain
+# a copy of the EPL at:
+#
+# http://www.eclipse.org/legal/epl-v10.html
+#
+# 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
+# EPL for the specific language governing permissions and limitations
+# under the EPL.
+
+from optparse import OptionParser
+
+from loxi_globals import OFVersions
+
+##
+# Command line options
+options = {}
+
+##
+# Command line arguments
+args = []
+
+##@var config_default
+# The default configuration dictionary for LOXI code generation
+options_default = {
+    "lang"               : "c",
+    "version-list"       : "1.0 1.1 1.2 1.3",
+    "install-dir"        : "loxi_output",
+}
+
+def lang_normalize(lang):
+    """
+    Normalize the representation of the language
+    """
+    return lang.lower()
+
+def version_list_normalize(vlist):
+    """
+    Normalize the version list and return as an array
+    """
+    out_list = []
+    # @fixme Map to OF version references
+    if vlist.find(',') > 0:
+        vlist = vlist.split(',')
+    else:
+        vlist = vlist.split()
+    vlist.sort()
+    for ver in vlist:
+        try:
+            out_list.append(OFVersions.from_string(ver))
+        except KeyError:
+            sys.stderr.write("Bad version input, %s" % str(ver))
+            sys.exit(1)
+    return out_list
+
+def process_commandline(default_vals=options_default):
+    """
+    Set up the options dictionary
+
+    @param cfg_dflt The default configuration dictionary
+    @return A pair (options, args) as per parser return
+    """
+    global options
+    global args
+    global target_version_list
+
+    parser = OptionParser(version="%prog 0.1")
+
+    #@todo Add options via dictionary
+    parser.add_option("--list-files", action="store_true", default=False,
+                      help="List output files generated")
+    parser.add_option("-l", "--lang", "--language",
+                      default=default_vals["lang"],
+                      help="Select the target language: c, python")
+    parser.add_option("-i", "--install-dir",
+                      default=default_vals["install-dir"],
+                      help="Directory to install generated files to (default %s)" % default_vals["install-dir"])
+    parser.add_option("-v", "--verbose",
+                      action="store_true", default=False,
+                      help="Debug output")
+
+    parser.add_option("-V", "--version-list",
+                      default=default_vals["version-list"],
+                      help="Specify the versions to target as 1.0 1.1 etc")
+
+    (options, args) = parser.parse_args()
+
+    options.lang = lang_normalize(options.lang)
+    target_version_list = version_list_normalize(options.version_list)
+    target_version_list.sort()
+    return (options, args, target_version_list)