1 files changed, 5 insertions, 0 deletions

diff --git a/bitbake/lib/bb/data.py b/bitbake/lib/bb/data.py
index 7047f48934..110666ca2b 100644
--- a/bitbake/lib/bb/data.py
+++ b/bitbake/lib/bb/data.py
@@ -158,6 +158,11 @@ def expandKeys(alterdata, readdata = None):
 
     for key in todolist:
         ekey = todolist[key]
+        if ekey in keys(alterdata):
+            val = alterdata.getVar(key, 0)
+            newval = alterdata.getVar(ekey, 0)
+            if val is not None and newval is not None:
+                bb.warn("Variable key %s (%s) replaces original key %s (%s)." % (key, val, ekey, newval))
         alterdata.renameVar(key, ekey)
 
 def inheritFromOS(d, savedenv, permitted):