jenkins: bail early if $MAKE env var is not set
If $MAKE is unset, it produces confusing errors, rather check explicitly.
Change-Id: I59b111dfdee4e1edea04155144f01d99f5f72aa1
diff --git a/contrib/jenkins_common.sh b/contrib/jenkins_common.sh
index 6cfa334..bc4ac65 100644
--- a/contrib/jenkins_common.sh
+++ b/contrib/jenkins_common.sh
@@ -2,6 +2,12 @@
set -ex
+if [ -z "$MAKE" ]; then
+ set +x
+ echo "Error: you need to set \$MAKE before invoking, e.g. MAKE=make"
+ exit 1
+fi
+
verify_value_string_arrays_are_terminated.py $(find . -name "*.[hc]")
prep_build() {