1 files changed, 18 insertions, 0 deletions
diff --git a/pcr/babeld/babeld.install b/pcr/babeld/babeld.install
new file mode 100644
index 000000000..686153617
--- /dev/null
+++ b/pcr/babeld/babeld.install
@@ -0,0 +1,18 @@
+compatibility_warning() {
+  echo "PLEASE NOTE:"
+  echo " "
+  echo "-------------------------------------------------------------"
+  echo " This version uses the IANA-allocated UDP port and multicast"
+  echo " group and is therefore incompatible with older versions."
+  echo "-------------------------------------------------------------"
+}
+
+post_upgrade() {
+  major=$(echo $2 | cut -d '.' -f1)
+  minor=$(echo $2 | cut -d '.' -f2)
+  if [ $major -lt 1 ]; then
+    compatibility_warning
+  elif [ $major -eq 1 -a $minor -lt 1 ]; then
+    compatibility_warning
+  fi	
+}