diff --git a/import-layers/yocto-poky/bitbake/lib/bb/cookerdata.py b/import-layers/yocto-poky/bitbake/lib/bb/cookerdata.py
index 50259a9..b07c266 100644
--- a/import-layers/yocto-poky/bitbake/lib/bb/cookerdata.py
+++ b/import-layers/yocto-poky/bitbake/lib/bb/cookerdata.py
@@ -22,9 +22,11 @@
 # with this program; if not, write to the Free Software Foundation, Inc.,
 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
-import os, sys
-from functools import wraps
 import logging
+import os
+import re
+import sys
+from functools import wraps
 import bb
 from bb import data
 import bb.parse
@@ -192,7 +194,8 @@
                 fn, _, _, _ = traceback.extract_tb(tb, 1)[0]
                 if not fn.startswith(bbdir):
                     break
-            parselog.critical("Unable to parse %s", fn, exc_info=(exc_class, exc, tb))
+            parselog.critical("Unable to parse %s" % fn, exc_info=(exc_class, exc, tb))
+            sys.exit(1)
         except bb.parse.ParseError as exc:
             parselog.critical(str(exc))
             sys.exit(1)
@@ -234,9 +237,9 @@
 
         bb.utils.set_context(bb.utils.clean_context())
         bb.event.set_class_handlers(bb.event.clean_class_handlers())
-        self.data = bb.data.init()
+        self.basedata = bb.data.init()
         if self.tracking:
-            self.data.enableTracking()
+            self.basedata.enableTracking()
 
         # Keep a datastore of the initial environment variables and their
         # values from when BitBake was launched to enable child processes
@@ -247,16 +250,49 @@
             self.savedenv.setVar(k, cookercfg.env[k])
 
         filtered_keys = bb.utils.approved_variables()
-        bb.data.inheritFromOS(self.data, self.savedenv, filtered_keys)
-        self.data.setVar("BB_ORIGENV", self.savedenv)
+        bb.data.inheritFromOS(self.basedata, self.savedenv, filtered_keys)
+        self.basedata.setVar("BB_ORIGENV", self.savedenv)
         
         if worker:
-            self.data.setVar("BB_WORKERCONTEXT", "1")
+            self.basedata.setVar("BB_WORKERCONTEXT", "1")
+
+        self.data = self.basedata
+        self.mcdata = {}
 
     def parseBaseConfiguration(self):
         try:
-            self.parseConfigurationFiles(self.prefiles, self.postfiles)
-        except SyntaxError:
+            bb.parse.init_parser(self.basedata)
+            self.data = self.parseConfigurationFiles(self.prefiles, self.postfiles)
+
+            if self.data.getVar("BB_WORKERCONTEXT", False) is None:
+                bb.fetch.fetcher_init(self.data)
+            bb.codeparser.parser_cache_init(self.data)
+
+            bb.event.fire(bb.event.ConfigParsed(), self.data)
+
+            reparse_cnt = 0
+            while self.data.getVar("BB_INVALIDCONF", False) is True:
+                if reparse_cnt > 20:
+                    logger.error("Configuration has been re-parsed over 20 times, "
+                                 "breaking out of the loop...")
+                    raise Exception("Too deep config re-parse loop. Check locations where "
+                                    "BB_INVALIDCONF is being set (ConfigParsed event handlers)")
+                self.data.setVar("BB_INVALIDCONF", False)
+                self.data = self.parseConfigurationFiles(self.prefiles, self.postfiles)
+                reparse_cnt += 1
+                bb.event.fire(bb.event.ConfigParsed(), self.data)
+
+            bb.parse.init_parser(self.data)
+            self.data_hash = self.data.get_hash()
+            self.mcdata[''] = self.data
+
+            multiconfig = (self.data.getVar("BBMULTICONFIG", True) or "").split()
+            for config in multiconfig:
+                mcdata = self.parseConfigurationFiles(['conf/multiconfig/%s.conf' % config] + self.prefiles, self.postfiles)
+                bb.event.fire(bb.event.ConfigParsed(), mcdata)
+                self.mcdata[config] = mcdata
+
+        except (SyntaxError, bb.BBHandledException):
             raise bb.BBHandledException
         except bb.data_smart.ExpansionError as e:
             logger.error(str(e))
@@ -269,8 +305,7 @@
         return findConfigFile("bblayers.conf", data)
 
     def parseConfigurationFiles(self, prefiles, postfiles):
-        data = self.data
-        bb.parse.init_parser(data)
+        data = bb.data.createCopy(self.basedata)
 
         # Parse files for loading *before* bitbake.conf and any includes
         for f in prefiles:
@@ -289,15 +324,22 @@
             data = bb.data.createCopy(data)
             approved = bb.utils.approved_variables()
             for layer in layers:
+                if not os.path.isdir(layer):
+                    parselog.critical("Layer directory '%s' does not exist! "
+                                      "Please check BBLAYERS in %s" % (layer, layerconf))
+                    sys.exit(1)
                 parselog.debug(2, "Adding layer %s", layer)
                 if 'HOME' in approved and '~' in layer:
                     layer = os.path.expanduser(layer)
                 if layer.endswith('/'):
                     layer = layer.rstrip('/')
                 data.setVar('LAYERDIR', layer)
+                data.setVar('LAYERDIR_RE', re.escape(layer))
                 data = parse_config_file(os.path.join(layer, "conf", "layer.conf"), data)
                 data.expandVarref('LAYERDIR')
+                data.expandVarref('LAYERDIR_RE')
 
+            data.delVar('LAYERDIR_RE')
             data.delVar('LAYERDIR')
 
         if not data.getVar("BBPATH", True):
@@ -323,23 +365,13 @@
         # We register any handlers we've found so far here...
         for var in data.getVar('__BBHANDLERS', False) or []:
             handlerfn = data.getVarFlag(var, "filename", False)
+            if not handlerfn:
+                parselog.critical("Undefined event handler function '%s'" % var)
+                sys.exit(1)
             handlerln = int(data.getVarFlag(var, "lineno", False))
             bb.event.register(var, data.getVar(var, False),  (data.getVarFlag(var, "eventmask", True) or "").split(), handlerfn, handlerln)
 
-        if data.getVar("BB_WORKERCONTEXT", False) is None:
-            bb.fetch.fetcher_init(data)
-        bb.codeparser.parser_cache_init(data)
-        bb.event.fire(bb.event.ConfigParsed(), data)
-
-        if data.getVar("BB_INVALIDCONF", False) is True:
-            data.setVar("BB_INVALIDCONF", False)
-            self.parseConfigurationFiles(self.prefiles, self.postfiles)
-            return
-
-        bb.parse.init_parser(data)
         data.setVar('BBINCLUDED',bb.parse.get_file_depends(data))
-        self.data = data
-        self.data_hash = data.get_hash()
 
-
+        return data