--- /dev/null
+++ dyld/dyld-1340/build-scripts/include.sh
@@ -0,0 +1,10 @@
+exit_if_error() {
+  local exit_code=$1
+  shift
+  [[ $exit_code ]] &&               # do nothing if no error code passed
+    ((exit_code != 0)) && {         # do nothing if error code is 0
+      printf 'ERROR: %s\n' "$@" >&2 # we can use better logging here
+      exit "$exit_code"             # we could also check to make sure
+                                    # error code is numeric when passed
+    }
+}