From 03f142b99e7fdc191d3a08fe1da791344d5e0798 Mon Sep 17 00:00:00 2001
From: Rudi Heitbaum <rudi@heitbaum.com>
Date: Sat, 30 Apr 2022 09:54:03 +0000
Subject: [PATCH] scripts/makefile_helper: make sure variables are set before
 running an rm

---
 scripts/makefile_helper | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/scripts/makefile_helper b/scripts/makefile_helper
index dfcf40dd16..9184efffda 100755
--- a/scripts/makefile_helper
+++ b/scripts/makefile_helper
@@ -8,6 +8,11 @@ set -e
 # If config/options can't be sourced, abort. PWD isn't the expected ROOT.
 . config/options ""
 
+if [ -z "${BUILD_BASE}" -o -z "${BUILD_ROOT}" ]; then
+  # make sure variables are set before running an rm
+  echo "error: ${0}: both BUILD_BASE and BUILD_ROOT must be set when running \"[clean|distclean]\"; aborting"
+  exit 1
+fi
 # task handling
 case $1 in
   --clean)