diff --git a/meta/poky/scripts/contrib/bbvars.py b/meta/poky/scripts/contrib/bbvars.py
new file mode 100755
index 0000000..286b5a9
--- /dev/null
+++ b/meta/poky/scripts/contrib/bbvars.py
@@ -0,0 +1,180 @@
+#!/usr/bin/env python3
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+#
+# Copyright (C) Darren Hart <dvhart@linux.intel.com>, 2010
+
+
+import sys
+import getopt
+import os
+import os.path
+import re
+
+# Set up sys.path to let us import tinfoil
+scripts_path = os.path.dirname(os.path.dirname(os.path.realpath(__file__)))
+lib_path = scripts_path + '/lib'
+sys.path.insert(0, lib_path)
+import scriptpath
+scriptpath.add_bitbake_lib_path()
+import bb.tinfoil
+
+def usage():
+    print('Usage: %s -d FILENAME [-d FILENAME]*' % os.path.basename(sys.argv[0]))
+    print('  -d FILENAME         documentation file to search')
+    print('  -h, --help          display this help and exit')
+    print('  -t FILENAME         documentation config file (for doc tags)')
+    print('  -T                  Only display variables with doc tags (requires -t)')
+
+def bbvar_is_documented(var, documented_vars):
+    ''' Check if variable (var) is in the list of documented variables(documented_vars) '''
+    if var in documented_vars:
+        return True
+    else:
+        return False
+
+def collect_documented_vars(docfiles):
+    ''' Walk the docfiles and collect the documented variables '''
+    documented_vars = []
+    prog = re.compile(".*($|[^A-Z_])<glossentry id=\'var-")
+    var_prog = re.compile('<glossentry id=\'var-(.*)\'>')
+    for d in docfiles:
+        with open(d) as f:
+            documented_vars += var_prog.findall(f.read())
+
+    return documented_vars
+
+def bbvar_doctag(var, docconf):
+    prog = re.compile('^%s\[doc\] *= *"(.*)"' % (var))
+    if docconf == "":
+        return "?"
+
+    try:
+        f = open(docconf)
+    except IOError as err:
+        return err.args[1]
+
+    for line in f:
+        m = prog.search(line)
+        if m:
+            return m.group(1)
+
+    f.close()
+    return ""
+
+def main():
+    docfiles = []
+    bbvars = set()
+    undocumented = []
+    docconf = ""
+    onlydoctags = False
+
+    # Collect and validate input
+    try:
+        opts, args = getopt.getopt(sys.argv[1:], "d:hm:t:T", ["help"])
+    except getopt.GetoptError as err:
+        print('%s' % str(err))
+        usage()
+        sys.exit(2)
+
+    for o, a in opts:
+        if o in ('-h', '--help'):
+            usage()
+            sys.exit(0)
+        elif o == '-d':
+            if os.path.isfile(a):
+                docfiles.append(a)
+            else:
+                print('ERROR: documentation file %s is not a regular file' % a)
+                sys.exit(3)
+        elif o == "-t":
+            if os.path.isfile(a):
+                docconf = a
+        elif o == "-T":
+            onlydoctags = True
+        else:
+            assert False, "unhandled option"
+
+    if len(docfiles) == 0:
+        print('ERROR: no docfile specified')
+        usage()
+        sys.exit(5)
+
+    if onlydoctags and docconf == "":
+        print('ERROR: no docconf specified')
+        usage()
+        sys.exit(7)
+
+    prog = re.compile("^[^a-z]*$")
+    with bb.tinfoil.Tinfoil() as tinfoil:
+        tinfoil.prepare(config_only=False)
+        parser = bb.codeparser.PythonParser('parser', None)
+        datastore = tinfoil.config_data
+
+        def bbvars_update(data):
+            if prog.match(data):
+                bbvars.add(data)
+            if tinfoil.config_data.getVarFlag(data, 'python'):
+                try:
+                    parser.parse_python(tinfoil.config_data.getVar(data))
+                except bb.data_smart.ExpansionError:
+                    pass
+                for var in parser.references:
+                    if prog.match(var):
+                        bbvars.add(var)
+            else:
+                try:
+                    expandedVar = datastore.expandWithRefs(datastore.getVar(data, False), data)
+                    for var in expandedVar.references:
+                        if prog.match(var):
+                            bbvars.add(var)
+                except bb.data_smart.ExpansionError:
+                    pass
+
+        # Use tinfoil to collect all the variable names globally
+        for data in datastore:
+            bbvars_update(data)
+
+        # Collect variables from all recipes
+        for recipe in tinfoil.all_recipe_files(variants=False):
+            print("Checking %s" % recipe)
+            for data in tinfoil.parse_recipe_file(recipe):
+                bbvars_update(data)
+
+    documented_vars = collect_documented_vars(docfiles)
+
+    # Check each var for documentation
+    varlen = 0
+    for v in bbvars:
+        if len(v) > varlen:
+            varlen = len(v)
+        if not bbvar_is_documented(v, documented_vars):
+            undocumented.append(v)
+    undocumented.sort()
+    varlen = varlen + 1
+
+    # Report all undocumented variables
+    print('Found %d undocumented bb variables (out of %d):' % (len(undocumented), len(bbvars)))
+    header = '%s%s' % (str("VARIABLE").ljust(varlen), str("DOCTAG").ljust(7))
+    print(header)
+    print(str("").ljust(len(header), '='))
+    for v in undocumented:
+        doctag = bbvar_doctag(v, docconf)
+        if not onlydoctags or not doctag == "":
+            print('%s%s' % (v.ljust(varlen), doctag))
+
+
+if __name__ == "__main__":
+    main()