diff --git a/build/gen_changelog.sh b/build/gen_changelog.sh
new file mode 100755
index 000000000000..6750469399f4
--- /dev/null
+++ b/build/gen_changelog.sh
@@ -0,0 +1,30 @@
+#!/bin/bash
+
+COMMIT_RANGE="$1"
+
+REPO=`git remote -v | grep -m 1 "(push)" | sed -e "s/.*github.com[:/]\(.*\)\.git.*/\1/"`
+BASE_URL="https://github.com/$REPO/issues/"
+
+if test -z "$1"; then
+	echo "This script builds changelog entries based on merge commits within the given range" >&2
+	echo "" >&2
+	echo "Usage $0 commit_range" >&2
+	echo "" >&2
+	echo "commit_range is \"commitid1..commitid2\", for example \"v10.0.2..stable20\"" >&2
+	exit 1
+fi
+
+# get all merge commits within the commit range
+git log --merges "$COMMIT_RANGE" --format="format:%s - %b" |
+	# only pick the "pull request" ones in case of some bad merges
+	grep "pull request" |
+	# pick up PR id and subject
+	cut -d" " -f4,8- |
+	# move the PR id to the end of the row
+	sed -e "s&^\(#[0-9]*\) \(.*\)$&- \2 - \1&g" |
+	# replace PR id with Github links
+	sed -e "s& #\([0-9]*\)$& \[#\1\]\("$BASE_URL"\1\)&g" |
+	# remove "[stable10]" or other prefix strings
+	sed -e "s&\[stable[0-9]*\] &&gi"
+
+